diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 3178 |
1 files changed, 2324 insertions, 854 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index 13bc69d6b679..1254d38f1778 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -27,6 +27,7 @@ #include "dm_helpers.h" #include "opp.h" #include "dsc.h" +#include "clk_mgr.h" #include "resource.h" #include "inc/core_types.h" @@ -38,6 +39,7 @@ #include "dce/dmub_hw_lock_mgr.h" #include "inc/dc_link_dpia.h" #include "inc/link_enc_cfg.h" +#include "link/link_dp_trace.h" /*Travis*/ static const uint8_t DP_VGA_LVDS_CONVERTER_ID_2[] = "sivarT"; @@ -50,6 +52,13 @@ static const uint8_t DP_VGA_LVDS_CONVERTER_ID_3[] = "dnomlA"; #include "link_dpcd.h" +#ifndef MAX +#define MAX(X, Y) ((X) > (Y) ? (X) : (Y)) +#endif +#ifndef MIN +#define MIN(X, Y) ((X) < (Y) ? (X) : (Y)) +#endif + /* maximum pre emphasis level allowed for each voltage swing level*/ static const enum dc_pre_emphasis voltage_swing_to_pre_emphasis[] = { PRE_EMPHASIS_LEVEL3, @@ -62,7 +71,6 @@ enum { POST_LT_ADJ_REQ_TIMEOUT = 200 }; -#if defined(CONFIG_DRM_AMD_DC_DCN) struct dp_lt_fallback_entry { enum dc_lane_count lane_count; enum dc_link_rate link_rate; @@ -97,15 +105,18 @@ static const struct dp_lt_fallback_entry dp_lt_fallbacks[] = { {LANE_COUNT_ONE, LINK_RATE_HIGH}, {LANE_COUNT_ONE, LINK_RATE_LOW}, }; -#endif + +static const struct dc_link_settings fail_safe_link_settings = { + .lane_count = LANE_COUNT_ONE, + .link_rate = LINK_RATE_LOW, + .link_spread = LINK_SPREAD_DISABLED, +}; static bool decide_fallback_link_setting( - struct dc_link_settings initial_link_settings, - struct dc_link_settings *current_link_setting, + struct dc_link *link, + struct dc_link_settings *max, + struct dc_link_settings *cur, enum link_training_result training_result); -static struct dc_link_settings get_common_supported_link_settings( - struct dc_link_settings link_setting_a, - struct dc_link_settings link_setting_b); static void maximize_lane_settings(const struct link_training_settings *lt_settings, struct dc_lane_settings lane_settings[LANE_COUNT_DP_MAX]); static void override_lane_settings(const struct link_training_settings *lt_settings, @@ -116,7 +127,7 @@ static uint32_t get_cr_training_aux_rd_interval(struct dc_link *link, { union training_aux_rd_interval training_rd_interval; uint32_t wait_in_micro_secs = 100; -#if defined(CONFIG_DRM_AMD_DC_DCN) + memset(&training_rd_interval, 0, sizeof(training_rd_interval)); if (dp_get_link_encoding_format(link_settings) == DP_8b_10b_ENCODING && link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_12) { @@ -128,15 +139,7 @@ static uint32_t get_cr_training_aux_rd_interval(struct dc_link *link, if (training_rd_interval.bits.TRAINIG_AUX_RD_INTERVAL) wait_in_micro_secs = training_rd_interval.bits.TRAINIG_AUX_RD_INTERVAL * 4000; } -#else - core_link_read_dpcd( - link, - DP_TRAINING_AUX_RD_INTERVAL, - (uint8_t *)&training_rd_interval, - sizeof(training_rd_interval)); - if (training_rd_interval.bits.TRAINIG_AUX_RD_INTERVAL) - wait_in_micro_secs = training_rd_interval.bits.TRAINIG_AUX_RD_INTERVAL * 4000; -#endif + return wait_in_micro_secs; } @@ -144,7 +147,6 @@ static uint32_t get_eq_training_aux_rd_interval( struct dc_link *link, const struct dc_link_settings *link_settings) { -#if defined(CONFIG_DRM_AMD_DC_DCN) union training_aux_rd_interval training_rd_interval; memset(&training_rd_interval, 0, sizeof(training_rd_interval)); @@ -173,41 +175,16 @@ static uint32_t get_eq_training_aux_rd_interval( case 6: return 64000; default: return 400; } -#else - union training_aux_rd_interval training_rd_interval; - uint32_t wait_in_micro_secs = 400; - - memset(&training_rd_interval, 0, sizeof(training_rd_interval)); - /* overwrite the delay if rev > 1.1*/ - if (link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_12) { - /* DP 1.2 or later - retrieve delay through - * "DPCD_ADDR_TRAINING_AUX_RD_INTERVAL" register */ - core_link_read_dpcd( - link, - DP_TRAINING_AUX_RD_INTERVAL, - (uint8_t *)&training_rd_interval, - sizeof(training_rd_interval)); - - if (training_rd_interval.bits.TRAINIG_AUX_RD_INTERVAL) - wait_in_micro_secs = training_rd_interval.bits.TRAINIG_AUX_RD_INTERVAL * 4000; - } - - return wait_in_micro_secs; -#endif } void dp_wait_for_training_aux_rd_interval( struct dc_link *link, uint32_t wait_in_micro_secs) { -#if defined(CONFIG_DRM_AMD_DC_DCN) - if (wait_in_micro_secs > 16000) + if (wait_in_micro_secs > 1000) msleep(wait_in_micro_secs/1000); else udelay(wait_in_micro_secs); -#else - udelay(wait_in_micro_secs); -#endif DC_LOG_HW_LINK_TRAINING("%s:\n wait = %d\n", __func__, @@ -235,7 +212,6 @@ enum dpcd_training_patterns case DP_TRAINING_PATTERN_SEQUENCE_4: dpcd_tr_pattern = DPCD_TRAINING_PATTERN_4; break; -#if defined(CONFIG_DRM_AMD_DC_DCN) case DP_128b_132b_TPS1: dpcd_tr_pattern = DPCD_128b_132b_TPS1; break; @@ -245,7 +221,6 @@ enum dpcd_training_patterns case DP_128b_132b_TPS2_CDS: dpcd_tr_pattern = DPCD_128b_132b_TPS2_CDS; break; -#endif case DP_TRAINING_PATTERN_VIDEOIDLE: dpcd_tr_pattern = DPCD_TRAINING_PATTERN_VIDEOIDLE; break; @@ -288,10 +263,8 @@ static enum dc_dp_training_pattern decide_cr_training_pattern( case DP_8b_10b_ENCODING: default: return DP_TRAINING_PATTERN_SEQUENCE_1; -#if defined(CONFIG_DRM_AMD_DC_DCN) case DP_128b_132b_ENCODING: return DP_128b_132b_TPS1; -#endif } } @@ -299,19 +272,11 @@ static enum dc_dp_training_pattern decide_eq_training_pattern(struct dc_link *li const struct dc_link_settings *link_settings) { struct link_encoder *link_enc; -#if defined(CONFIG_DRM_AMD_DC_DCN) struct encoder_feature_support *enc_caps; struct dpcd_caps *rx_caps = &link->dpcd_caps; enum dc_dp_training_pattern pattern = DP_TRAINING_PATTERN_SEQUENCE_2; - /* Access link encoder capability based on whether it is statically - * or dynamically assigned to a link. - */ - if (link->is_dig_mapping_flexible && - link->dc->res_pool->funcs->link_encs_assign) - link_enc = link_enc_cfg_get_link_enc_used_by_link(link->ctx->dc, link); - else - link_enc = link->link_enc; + link_enc = link_enc_cfg_get_link_enc(link); ASSERT(link_enc); enc_caps = &link_enc->features; @@ -334,41 +299,8 @@ static enum dc_dp_training_pattern decide_eq_training_pattern(struct dc_link *li break; } return pattern; -#else - enum dc_dp_training_pattern highest_tp = DP_TRAINING_PATTERN_SEQUENCE_2; - struct encoder_feature_support *features; - struct dpcd_caps *dpcd_caps = &link->dpcd_caps; - - /* Access link encoder capability based on whether it is statically - * or dynamically assigned to a link. - */ - if (link->is_dig_mapping_flexible && - link->dc->res_pool->funcs->link_encs_assign) - link_enc = link_enc_cfg_get_link_enc_used_by_link(link->ctx->dc, link); - else - link_enc = link->link_enc; - ASSERT(link_enc); - features = &link_enc->features; - - if (features->flags.bits.IS_TPS3_CAPABLE) - highest_tp = DP_TRAINING_PATTERN_SEQUENCE_3; - - if (features->flags.bits.IS_TPS4_CAPABLE) - highest_tp = DP_TRAINING_PATTERN_SEQUENCE_4; - - if (dpcd_caps->max_down_spread.bits.TPS4_SUPPORTED && - highest_tp >= DP_TRAINING_PATTERN_SEQUENCE_4) - return DP_TRAINING_PATTERN_SEQUENCE_4; - - if (dpcd_caps->max_ln_count.bits.TPS3_SUPPORTED && - highest_tp >= DP_TRAINING_PATTERN_SEQUENCE_3) - return DP_TRAINING_PATTERN_SEQUENCE_3; - - return DP_TRAINING_PATTERN_SEQUENCE_2; -#endif } -#if defined(CONFIG_DRM_AMD_DC_DCN) static uint8_t get_dpcd_link_rate(const struct dc_link_settings *link_settings) { uint8_t link_rate = 0; @@ -396,7 +328,98 @@ static uint8_t get_dpcd_link_rate(const struct dc_link_settings *link_settings) return link_rate; } -#endif + +static void dp_fixed_vs_pe_read_lane_adjust( + struct dc_link *link, + union dpcd_training_lane dpcd_lane_adjust[LANE_COUNT_DP_MAX]) +{ + const uint8_t vendor_lttpr_write_data_vs[3] = {0x0, 0x53, 0x63}; + const uint8_t vendor_lttpr_write_data_pe[3] = {0x0, 0x54, 0x63}; + const uint8_t offset = dp_convert_to_count( + link->dpcd_caps.lttpr_caps.phy_repeater_cnt); + uint32_t vendor_lttpr_write_address = 0xF004F; + uint32_t vendor_lttpr_read_address = 0xF0053; + uint8_t dprx_vs = 0; + uint8_t dprx_pe = 0; + uint8_t lane; + + if (offset != 0xFF) { + vendor_lttpr_write_address += + ((DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE) * (offset - 1)); + vendor_lttpr_read_address += + ((DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE) * (offset - 1)); + } + + /* W/A to read lane settings requested by DPRX */ + core_link_write_dpcd( + link, + vendor_lttpr_write_address, + &vendor_lttpr_write_data_vs[0], + sizeof(vendor_lttpr_write_data_vs)); + core_link_read_dpcd( + link, + vendor_lttpr_read_address, + &dprx_vs, + 1); + core_link_write_dpcd( + link, + vendor_lttpr_write_address, + &vendor_lttpr_write_data_pe[0], + sizeof(vendor_lttpr_write_data_pe)); + core_link_read_dpcd( + link, + vendor_lttpr_read_address, + &dprx_pe, + 1); + + for (lane = 0; lane < LANE_COUNT_DP_MAX; lane++) { + dpcd_lane_adjust[lane].bits.VOLTAGE_SWING_SET = (dprx_vs >> (2 * lane)) & 0x3; + dpcd_lane_adjust[lane].bits.PRE_EMPHASIS_SET = (dprx_pe >> (2 * lane)) & 0x3; + } +} + +static void dp_fixed_vs_pe_set_retimer_lane_settings( + struct dc_link *link, + const union dpcd_training_lane dpcd_lane_adjust[LANE_COUNT_DP_MAX], + uint8_t lane_count) +{ + const uint8_t offset = dp_convert_to_count( + link->dpcd_caps.lttpr_caps.phy_repeater_cnt); + const uint8_t vendor_lttpr_write_data_reset[4] = {0x1, 0x50, 0x63, 0xFF}; + uint32_t vendor_lttpr_write_address = 0xF004F; + uint8_t vendor_lttpr_write_data_vs[4] = {0x1, 0x51, 0x63, 0x0}; + uint8_t vendor_lttpr_write_data_pe[4] = {0x1, 0x52, 0x63, 0x0}; + uint8_t lane = 0; + + if (offset != 0xFF) { + vendor_lttpr_write_address += + ((DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE) * (offset - 1)); + } + + for (lane = 0; lane < lane_count; lane++) { + vendor_lttpr_write_data_vs[3] |= + dpcd_lane_adjust[lane].bits.VOLTAGE_SWING_SET << (2 * lane); + vendor_lttpr_write_data_pe[3] |= + dpcd_lane_adjust[lane].bits.PRE_EMPHASIS_SET << (2 * lane); + } + + /* Force LTTPR to output desired VS and PE */ + core_link_write_dpcd( + link, + vendor_lttpr_write_address, + &vendor_lttpr_write_data_reset[0], + sizeof(vendor_lttpr_write_data_reset)); + core_link_write_dpcd( + link, + vendor_lttpr_write_address, + &vendor_lttpr_write_data_vs[0], + sizeof(vendor_lttpr_write_data_vs)); + core_link_write_dpcd( + link, + vendor_lttpr_write_address, + &vendor_lttpr_write_data_pe[0], + sizeof(vendor_lttpr_write_data_pe)); +} enum dc_status dpcd_set_link_settings( struct dc_link *link, @@ -430,7 +453,7 @@ enum dc_status dpcd_set_link_settings( status = core_link_write_dpcd(link, DP_LANE_COUNT_SET, &lane_count_set.raw, 1); - if (link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_14 && + if (link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_13 && lt_settings->link_settings.use_link_rate_set == true) { rate = 0; /* WA for some MUX chips that will power down with eDP and lose supported @@ -447,11 +470,8 @@ enum dc_status dpcd_set_link_settings( status = core_link_write_dpcd(link, DP_LINK_RATE_SET, <_settings->link_settings.link_rate_set, 1); } else { -#if defined(CONFIG_DRM_AMD_DC_DCN) rate = get_dpcd_link_rate(<_settings->link_settings); -#else - rate = (uint8_t) (lt_settings->link_settings.link_rate); -#endif + status = core_link_write_dpcd(link, DP_LINK_BW_SET, &rate, 1); } @@ -493,10 +513,8 @@ uint8_t dc_dp_initialize_scrambling_data_symbols( disable_scrabled_data_symbols = 1; break; case DP_TRAINING_PATTERN_SEQUENCE_4: -#if defined(CONFIG_DRM_AMD_DC_DCN) case DP_128b_132b_TPS1: case DP_128b_132b_TPS2: -#endif disable_scrabled_data_symbols = 0; break; default: @@ -508,9 +526,9 @@ uint8_t dc_dp_initialize_scrambling_data_symbols( return disable_scrabled_data_symbols; } -static inline bool is_repeater(struct dc_link *link, uint32_t offset) +static inline bool is_repeater(const struct link_training_settings *lt_settings, uint32_t offset) { - return (link->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) && (offset != 0); + return (lt_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) && (offset != 0); } static void dpcd_set_lt_pattern_and_lane_settings( @@ -522,12 +540,12 @@ static void dpcd_set_lt_pattern_and_lane_settings( uint32_t dpcd_base_lt_offset; uint8_t dpcd_lt_buffer[5] = {0}; - union dpcd_training_pattern dpcd_pattern = { 0 }; + union dpcd_training_pattern dpcd_pattern = {0}; uint32_t size_in_bytes; bool edp_workaround = false; /* TODO link_prop.INTERNAL */ dpcd_base_lt_offset = DP_TRAINING_PATTERN_SET; - if (is_repeater(link, offset)) + if (is_repeater(lt_settings, offset)) dpcd_base_lt_offset = DP_TRAINING_PATTERN_SET_PHY_REPEATER1 + ((DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE) * (offset - 1)); @@ -543,7 +561,7 @@ static void dpcd_set_lt_pattern_and_lane_settings( dpcd_lt_buffer[DP_TRAINING_PATTERN_SET - DP_TRAINING_PATTERN_SET] = dpcd_pattern.raw; - if (is_repeater(link, offset)) { + if (is_repeater(lt_settings, offset)) { DC_LOG_HW_LINK_TRAINING("%s\n LTTPR Repeater ID: %d\n 0x%X pattern = %x\n", __func__, offset, @@ -566,8 +584,7 @@ static void dpcd_set_lt_pattern_and_lane_settings( lt_settings->dpcd_lane_settings, size_in_bytes); - if (is_repeater(link, offset)) { -#if defined(CONFIG_DRM_AMD_DC_DCN) + if (is_repeater(lt_settings, offset)) { if (dp_get_link_encoding_format(<_settings->link_settings) == DP_128b_132b_ENCODING) DC_LOG_HW_LINK_TRAINING("%s:\n LTTPR Repeater ID: %d\n" @@ -578,7 +595,6 @@ static void dpcd_set_lt_pattern_and_lane_settings( lt_settings->dpcd_lane_settings[0].tx_ffe.PRESET_VALUE); else if (dp_get_link_encoding_format(<_settings->link_settings) == DP_8b_10b_ENCODING) -#endif DC_LOG_HW_LINK_TRAINING("%s:\n LTTPR Repeater ID: %d\n" " 0x%X VS set = %x PE set = %x max VS Reached = %x max PE Reached = %x\n", __func__, @@ -589,7 +605,6 @@ static void dpcd_set_lt_pattern_and_lane_settings( lt_settings->dpcd_lane_settings[0].bits.MAX_SWING_REACHED, lt_settings->dpcd_lane_settings[0].bits.MAX_PRE_EMPHASIS_REACHED); } else { -#if defined(CONFIG_DRM_AMD_DC_DCN) if (dp_get_link_encoding_format(<_settings->link_settings) == DP_128b_132b_ENCODING) DC_LOG_HW_LINK_TRAINING("%s:\n 0x%X TX_FFE_PRESET_VALUE = %x\n", @@ -598,14 +613,13 @@ static void dpcd_set_lt_pattern_and_lane_settings( lt_settings->dpcd_lane_settings[0].tx_ffe.PRESET_VALUE); else if (dp_get_link_encoding_format(<_settings->link_settings) == DP_8b_10b_ENCODING) -#endif - DC_LOG_HW_LINK_TRAINING("%s:\n 0x%X VS set = %x PE set = %x max VS Reached = %x max PE Reached = %x\n", - __func__, - dpcd_base_lt_offset, - lt_settings->dpcd_lane_settings[0].bits.VOLTAGE_SWING_SET, - lt_settings->dpcd_lane_settings[0].bits.PRE_EMPHASIS_SET, - lt_settings->dpcd_lane_settings[0].bits.MAX_SWING_REACHED, - lt_settings->dpcd_lane_settings[0].bits.MAX_PRE_EMPHASIS_REACHED); + DC_LOG_HW_LINK_TRAINING("%s:\n 0x%X VS set = %x PE set = %x max VS Reached = %x max PE Reached = %x\n", + __func__, + dpcd_base_lt_offset, + lt_settings->dpcd_lane_settings[0].bits.VOLTAGE_SWING_SET, + lt_settings->dpcd_lane_settings[0].bits.PRE_EMPHASIS_SET, + lt_settings->dpcd_lane_settings[0].bits.MAX_SWING_REACHED, + lt_settings->dpcd_lane_settings[0].bits.MAX_PRE_EMPHASIS_REACHED); } if (edp_workaround) { /* for eDP write in 2 parts because the 5-byte burst is @@ -623,7 +637,6 @@ static void dpcd_set_lt_pattern_and_lane_settings( (uint8_t *)(lt_settings->dpcd_lane_settings), size_in_bytes); -#if defined(CONFIG_DRM_AMD_DC_DCN) } else if (dp_get_link_encoding_format(<_settings->link_settings) == DP_128b_132b_ENCODING) { core_link_write_dpcd( @@ -631,10 +644,9 @@ static void dpcd_set_lt_pattern_and_lane_settings( dpcd_base_lt_offset, dpcd_lt_buffer, sizeof(dpcd_lt_buffer)); -#endif - } else + } else /* write it all in (1 + number-of-lanes)-byte burst*/ - core_link_write_dpcd( + core_link_write_dpcd( link, dpcd_base_lt_offset, dpcd_lt_buffer, @@ -683,7 +695,7 @@ bool dp_is_interlane_aligned(union lane_align_status_updated align_status) void dp_hw_to_dpcd_lane_settings( const struct link_training_settings *lt_settings, const struct dc_lane_settings hw_lane_settings[LANE_COUNT_DP_MAX], - union dpcd_training_lane dpcd_lane_settings[LANE_COUNT_DP_MAX]) + union dpcd_training_lane dpcd_lane_settings[]) { uint8_t lane = 0; @@ -701,13 +713,11 @@ void dp_hw_to_dpcd_lane_settings( (hw_lane_settings[lane].PRE_EMPHASIS == PRE_EMPHASIS_MAX_LEVEL ? 1 : 0); } -#if defined(CONFIG_DRM_AMD_DC_DCN) else if (dp_get_link_encoding_format(<_settings->link_settings) == DP_128b_132b_ENCODING) { dpcd_lane_settings[lane].tx_ffe.PRESET_VALUE = hw_lane_settings[lane].FFE_PRESET.settings.level; } -#endif } } @@ -715,7 +725,7 @@ void dp_decide_lane_settings( const struct link_training_settings *lt_settings, const union lane_adjust ln_adjust[LANE_COUNT_DP_MAX], struct dc_lane_settings hw_lane_settings[LANE_COUNT_DP_MAX], - union dpcd_training_lane dpcd_lane_settings[LANE_COUNT_DP_MAX]) + union dpcd_training_lane dpcd_lane_settings[]) { uint32_t lane; @@ -729,13 +739,11 @@ void dp_decide_lane_settings( (enum dc_pre_emphasis)(ln_adjust[lane].bits. PRE_EMPHASIS_LANE); } -#if defined(CONFIG_DRM_AMD_DC_DCN) else if (dp_get_link_encoding_format(<_settings->link_settings) == DP_128b_132b_ENCODING) { hw_lane_settings[lane].FFE_PRESET.raw = ln_adjust[lane].tx_ffe.PRESET_VALUE; } -#endif } dp_hw_to_dpcd_lane_settings(lt_settings, hw_lane_settings, dpcd_lane_settings); @@ -786,9 +794,7 @@ static void maximize_lane_settings(const struct link_training_settings *lt_setti max_requested.VOLTAGE_SWING = lane_settings[0].VOLTAGE_SWING; max_requested.PRE_EMPHASIS = lane_settings[0].PRE_EMPHASIS; -#if defined(CONFIG_DRM_AMD_DC_DCN) max_requested.FFE_PRESET = lane_settings[0].FFE_PRESET; -#endif /* Determine what the maximum of the requested settings are*/ for (lane = 1; lane < lt_settings->link_settings.lane_count; lane++) { @@ -797,12 +803,10 @@ static void maximize_lane_settings(const struct link_training_settings *lt_setti if (lane_settings[lane].PRE_EMPHASIS > max_requested.PRE_EMPHASIS) max_requested.PRE_EMPHASIS = lane_settings[lane].PRE_EMPHASIS; -#if defined(CONFIG_DRM_AMD_DC_DCN) if (lane_settings[lane].FFE_PRESET.settings.level > max_requested.FFE_PRESET.settings.level) max_requested.FFE_PRESET.settings.level = lane_settings[lane].FFE_PRESET.settings.level; -#endif } /* make sure the requested settings are @@ -812,10 +816,8 @@ static void maximize_lane_settings(const struct link_training_settings *lt_setti if (max_requested.PRE_EMPHASIS > PRE_EMPHASIS_MAX_LEVEL) max_requested.PRE_EMPHASIS = PRE_EMPHASIS_MAX_LEVEL; -#if defined(CONFIG_DRM_AMD_DC_DCN) if (max_requested.FFE_PRESET.settings.level > DP_FFE_PRESET_MAX_LEVEL) max_requested.FFE_PRESET.settings.level = DP_FFE_PRESET_MAX_LEVEL; -#endif /* make sure the pre-emphasis matches the voltage swing*/ if (max_requested.PRE_EMPHASIS > @@ -828,9 +830,7 @@ static void maximize_lane_settings(const struct link_training_settings *lt_setti for (lane = 0; lane < LANE_COUNT_DP_MAX; lane++) { lane_settings[lane].VOLTAGE_SWING = max_requested.VOLTAGE_SWING; lane_settings[lane].PRE_EMPHASIS = max_requested.PRE_EMPHASIS; -#if defined(CONFIG_DRM_AMD_DC_DCN) lane_settings[lane].FFE_PRESET = max_requested.FFE_PRESET; -#endif } } @@ -841,24 +841,20 @@ static void override_lane_settings(const struct link_training_settings *lt_setti if (lt_settings->voltage_swing == NULL && lt_settings->pre_emphasis == NULL && -#if defined(CONFIG_DRM_AMD_DC_DCN) lt_settings->ffe_preset == NULL && -#endif lt_settings->post_cursor2 == NULL) return; - for (lane = 1; lane < LANE_COUNT_DP_MAX; lane++) { + for (lane = 0; lane < LANE_COUNT_DP_MAX; lane++) { if (lt_settings->voltage_swing) lane_settings[lane].VOLTAGE_SWING = *lt_settings->voltage_swing; if (lt_settings->pre_emphasis) lane_settings[lane].PRE_EMPHASIS = *lt_settings->pre_emphasis; if (lt_settings->post_cursor2) lane_settings[lane].POST_CURSOR2 = *lt_settings->post_cursor2; -#if defined(CONFIG_DRM_AMD_DC_DCN) if (lt_settings->ffe_preset) lane_settings[lane].FFE_PRESET = *lt_settings->ffe_preset; -#endif } } @@ -877,7 +873,7 @@ enum dc_status dp_get_lane_status_and_lane_adjust( uint32_t lane; enum dc_status status; - if (is_repeater(link, offset)) { + if (is_repeater(link_training_setting, offset)) { lane01_status_address = DP_LANE0_1_STATUS_PHY_REPEATER1 + ((DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE) * (offset - 1)); @@ -890,6 +886,14 @@ enum dc_status dp_get_lane_status_and_lane_adjust( (uint8_t *)(dpcd_buf), sizeof(dpcd_buf)); + if (status != DC_OK) { + DC_LOG_HW_LINK_TRAINING("%s:\n Failed to read from address 0x%X," + " keep current lane status and lane adjust unchanged", + __func__, + lane01_status_address); + return status; + } + for (lane = 0; lane < (uint32_t)(link_training_setting->link_settings.lane_count); lane++) { @@ -902,26 +906,17 @@ enum dc_status dp_get_lane_status_and_lane_adjust( ln_align->raw = dpcd_buf[2]; - if (is_repeater(link, offset)) { + if (is_repeater(link_training_setting, offset)) { DC_LOG_HW_LINK_TRAINING("%s:\n LTTPR Repeater ID: %d\n" " 0x%X Lane01Status = %x\n 0x%X Lane23Status = %x\n ", __func__, offset, lane01_status_address, dpcd_buf[0], lane01_status_address + 1, dpcd_buf[1]); - } else { - DC_LOG_HW_LINK_TRAINING("%s:\n 0x%X Lane01Status = %x\n 0x%X Lane23Status = %x\n ", - __func__, - lane01_status_address, dpcd_buf[0], - lane01_status_address + 1, dpcd_buf[1]); - } - lane01_adjust_address = DP_ADJUST_REQUEST_LANE0_1; - if (is_repeater(link, offset)) lane01_adjust_address = DP_ADJUST_REQUEST_LANE0_1_PHY_REPEATER1 + ((DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE) * (offset - 1)); - if (is_repeater(link, offset)) { DC_LOG_HW_LINK_TRAINING("%s:\n LTTPR Repeater ID: %d\n" " 0x%X Lane01AdjustRequest = %x\n 0x%X Lane23AdjustRequest = %x\n", __func__, @@ -931,6 +926,13 @@ enum dc_status dp_get_lane_status_and_lane_adjust( lane01_adjust_address + 1, dpcd_buf[lane_adjust_offset + 1]); } else { + DC_LOG_HW_LINK_TRAINING("%s:\n 0x%X Lane01Status = %x\n 0x%X Lane23Status = %x\n ", + __func__, + lane01_status_address, dpcd_buf[0], + lane01_status_address + 1, dpcd_buf[1]); + + lane01_adjust_address = DP_ADJUST_REQUEST_LANE0_1; + DC_LOG_HW_LINK_TRAINING("%s:\n 0x%X Lane01AdjustRequest = %x\n 0x%X Lane23AdjustRequest = %x\n", __func__, lane01_adjust_address, @@ -942,6 +944,23 @@ enum dc_status dp_get_lane_status_and_lane_adjust( return status; } +static enum dc_status dpcd_128b_132b_set_lane_settings( + struct dc_link *link, + const struct link_training_settings *link_training_setting) +{ + enum dc_status status = core_link_write_dpcd(link, + DP_TRAINING_LANE0_SET, + (uint8_t *)(link_training_setting->dpcd_lane_settings), + sizeof(link_training_setting->dpcd_lane_settings)); + + DC_LOG_HW_LINK_TRAINING("%s:\n 0x%X TX_FFE_PRESET_VALUE = %x\n", + __func__, + DP_TRAINING_LANE0_SET, + link_training_setting->dpcd_lane_settings[0].tx_ffe.PRESET_VALUE); + return status; +} + + enum dc_status dpcd_set_lane_settings( struct dc_link *link, const struct link_training_settings *link_training_setting, @@ -952,7 +971,7 @@ enum dc_status dpcd_set_lane_settings( lane0_set_address = DP_TRAINING_LANE0_SET; - if (is_repeater(link, offset)) + if (is_repeater(link_training_setting, offset)) lane0_set_address = DP_TRAINING_LANE0_SET_PHY_REPEATER1 + ((DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE) * (offset - 1)); @@ -961,19 +980,7 @@ enum dc_status dpcd_set_lane_settings( (uint8_t *)(link_training_setting->dpcd_lane_settings), link_training_setting->link_settings.lane_count); - if (is_repeater(link, offset)) { -#if defined(CONFIG_DRM_AMD_DC_DCN) - if (dp_get_link_encoding_format(&link_training_setting->link_settings) == - DP_128b_132b_ENCODING) - DC_LOG_HW_LINK_TRAINING("%s:\n LTTPR Repeater ID: %d\n" - " 0x%X TX_FFE_PRESET_VALUE = %x\n", - __func__, - offset, - lane0_set_address, - link_training_setting->dpcd_lane_settings[0].tx_ffe.PRESET_VALUE); - else if (dp_get_link_encoding_format(&link_training_setting->link_settings) == - DP_8b_10b_ENCODING) -#endif + if (is_repeater(link_training_setting, offset)) { DC_LOG_HW_LINK_TRAINING("%s\n LTTPR Repeater ID: %d\n" " 0x%X VS set = %x PE set = %x max VS Reached = %x max PE Reached = %x\n", __func__, @@ -985,16 +992,6 @@ enum dc_status dpcd_set_lane_settings( link_training_setting->dpcd_lane_settings[0].bits.MAX_PRE_EMPHASIS_REACHED); } else { -#if defined(CONFIG_DRM_AMD_DC_DCN) - if (dp_get_link_encoding_format(&link_training_setting->link_settings) == - DP_128b_132b_ENCODING) - DC_LOG_HW_LINK_TRAINING("%s:\n 0x%X TX_FFE_PRESET_VALUE = %x\n", - __func__, - lane0_set_address, - link_training_setting->dpcd_lane_settings[0].tx_ffe.PRESET_VALUE); - else if (dp_get_link_encoding_format(&link_training_setting->link_settings) == - DP_8b_10b_ENCODING) -#endif DC_LOG_HW_LINK_TRAINING("%s\n 0x%X VS set = %x PE set = %x max VS Reached = %x max PE Reached = %x\n", __func__, lane0_set_address, @@ -1024,6 +1021,7 @@ bool dp_is_max_vs_reached( static bool perform_post_lt_adj_req_sequence( struct dc_link *link, + const struct link_resource *link_res, struct link_training_settings *lt_settings) { enum dc_lane_count lane_count = @@ -1033,6 +1031,9 @@ static bool perform_post_lt_adj_req_sequence( uint32_t adj_req_timer; bool req_drv_setting_changed; uint32_t lane; + union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX] = {0}; + union lane_align_status_updated dpcd_lane_status_updated = {0}; + union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = {0}; req_drv_setting_changed = false; for (adj_req_count = 0; adj_req_count < POST_LT_ADJ_REQ_LIMIT; @@ -1044,11 +1045,6 @@ static bool perform_post_lt_adj_req_sequence( adj_req_timer < POST_LT_ADJ_REQ_TIMEOUT; adj_req_timer++) { - union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX]; - union lane_align_status_updated - dpcd_lane_status_updated; - union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = { { {0} } }; - dp_get_lane_status_and_lane_adjust( link, lt_settings, @@ -1087,6 +1083,7 @@ static bool perform_post_lt_adj_req_sequence( lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings); dc_link_dp_set_drive_settings(link, + link_res, lt_settings); break; } @@ -1128,14 +1125,12 @@ uint32_t dp_translate_training_aux_read_interval(uint32_t dpcd_aux_read_interval case 0x04: aux_rd_interval_us = 16000; break; -#if defined(CONFIG_DRM_AMD_DC_DCN) case 0x05: aux_rd_interval_us = 32000; break; case 0x06: aux_rd_interval_us = 64000; break; -#endif default: break; } @@ -1161,6 +1156,7 @@ enum link_training_result dp_get_cr_failure(enum dc_lane_count ln_count, static enum link_training_result perform_channel_equalization_sequence( struct dc_link *link, + const struct link_resource *link_res, struct link_training_settings *lt_settings, uint32_t offset) { @@ -1175,20 +1171,15 @@ static enum link_training_result perform_channel_equalization_sequence( /* Note: also check that TPS4 is a supported feature*/ tr_pattern = lt_settings->pattern_for_eq; -#if defined(CONFIG_DRM_AMD_DC_DCN) - if (is_repeater(link, offset) && dp_get_link_encoding_format(<_settings->link_settings) == DP_8b_10b_ENCODING) - tr_pattern = DP_TRAINING_PATTERN_SEQUENCE_4; -#else - if (is_repeater(link, offset)) + if (is_repeater(lt_settings, offset) && dp_get_link_encoding_format(<_settings->link_settings) == DP_8b_10b_ENCODING) tr_pattern = DP_TRAINING_PATTERN_SEQUENCE_4; -#endif - dp_set_hw_training_pattern(link, tr_pattern, offset); + dp_set_hw_training_pattern(link, link_res, tr_pattern, offset); for (retries_ch_eq = 0; retries_ch_eq <= LINK_TRAINING_MAX_RETRY_COUNT; retries_ch_eq++) { - dp_set_hw_lane_settings(link, lt_settings, offset); + dp_set_hw_lane_settings(link, link_res, lt_settings, offset); /* 2. update DPCD*/ if (!retries_ch_eq) @@ -1206,7 +1197,7 @@ static enum link_training_result perform_channel_equalization_sequence( /* 3. wait for receiver to lock-on*/ wait_time_microsec = lt_settings->eq_pattern_time; - if (is_repeater(link, offset)) + if (is_repeater(lt_settings, offset)) wait_time_microsec = dp_translate_training_aux_read_interval( link->dpcd_caps.lttpr_caps.aux_rd_interval[offset - 1]); @@ -1228,7 +1219,9 @@ static enum link_training_result perform_channel_equalization_sequence( /* 5. check CR done*/ if (!dp_is_cr_done(lane_count, dpcd_lane_status)) - return LINK_TRAINING_EQ_FAIL_CR; + return dpcd_lane_status[0].bits.CR_DONE_0 ? + LINK_TRAINING_EQ_FAIL_CR_PARTIAL : + LINK_TRAINING_EQ_FAIL_CR; /* 6. check CHEQ done*/ if (dp_is_ch_eq_done(lane_count, dpcd_lane_status) && @@ -1246,18 +1239,20 @@ static enum link_training_result perform_channel_equalization_sequence( } static void start_clock_recovery_pattern_early(struct dc_link *link, + const struct link_resource *link_res, struct link_training_settings *lt_settings, uint32_t offset) { DC_LOG_HW_LINK_TRAINING("%s\n GPU sends TPS1. Wait 400us.\n", __func__); - dp_set_hw_training_pattern(link, lt_settings->pattern_for_cr, offset); - dp_set_hw_lane_settings(link, lt_settings, offset); + dp_set_hw_training_pattern(link, link_res, lt_settings->pattern_for_cr, offset); + dp_set_hw_lane_settings(link, link_res, lt_settings, offset); udelay(400); } static enum link_training_result perform_clock_recovery_sequence( struct dc_link *link, + const struct link_resource *link_res, struct link_training_settings *lt_settings, uint32_t offset) { @@ -1267,13 +1262,17 @@ static enum link_training_result perform_clock_recovery_sequence( enum dc_lane_count lane_count = lt_settings->link_settings.lane_count; union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX]; union lane_align_status_updated dpcd_lane_status_updated; - union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = { { {0} } }; + union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = {0}; retries_cr = 0; retry_count = 0; + memset(&dpcd_lane_status, '\0', sizeof(dpcd_lane_status)); + memset(&dpcd_lane_status_updated, '\0', + sizeof(dpcd_lane_status_updated)); + if (!link->ctx->dc->work_arounds.lt_early_cr_pattern) - dp_set_hw_training_pattern(link, lt_settings->pattern_for_cr, offset); + dp_set_hw_training_pattern(link, link_res, lt_settings->pattern_for_cr, offset); /* najeeb - The synaptics MST hub can put the LT in * infinite loop by switching the VS @@ -1283,13 +1282,11 @@ static enum link_training_result perform_clock_recovery_sequence( while ((retries_cr < LINK_TRAINING_MAX_RETRY_COUNT) && (retry_count < LINK_TRAINING_MAX_CR_RETRY)) { - memset(&dpcd_lane_status, '\0', sizeof(dpcd_lane_status)); - memset(&dpcd_lane_status_updated, '\0', - sizeof(dpcd_lane_status_updated)); /* 1. call HWSS to set lane settings*/ dp_set_hw_lane_settings( link, + link_res, lt_settings, offset); @@ -1311,9 +1308,6 @@ static enum link_training_result perform_clock_recovery_sequence( /* 3. wait receiver to lock-on*/ wait_time_microsec = lt_settings->cr_pattern_time; - if (link->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) - wait_time_microsec = TRAINING_AUX_RD_INTERVAL; - dp_wait_for_training_aux_rd_interval( link, wait_time_microsec); @@ -1334,15 +1328,10 @@ static enum link_training_result perform_clock_recovery_sequence( return LINK_TRAINING_SUCCESS; /* 6. max VS reached*/ -#if defined(CONFIG_DRM_AMD_DC_DCN) if ((dp_get_link_encoding_format(<_settings->link_settings) == DP_8b_10b_ENCODING) && dp_is_max_vs_reached(lt_settings)) break; -#else - if (dp_is_max_vs_reached(lt_settings)) - break; -#endif /* 7. same lane settings*/ /* Note: settings are the same for all lanes, @@ -1351,12 +1340,10 @@ static enum link_training_result perform_clock_recovery_sequence( lt_settings->dpcd_lane_settings[0].bits.VOLTAGE_SWING_SET == dpcd_lane_adjust[0].bits.VOLTAGE_SWING_LANE) retries_cr++; -#if defined(CONFIG_DRM_AMD_DC_DCN) else if ((dp_get_link_encoding_format(<_settings->link_settings) == DP_128b_132b_ENCODING) && lt_settings->dpcd_lane_settings[0].tx_ffe.PRESET_VALUE == dpcd_lane_adjust[0].tx_ffe.PRESET_VALUE) retries_cr++; -#endif else retries_cr = 0; @@ -1379,13 +1366,14 @@ static enum link_training_result perform_clock_recovery_sequence( static inline enum link_training_result dp_transition_to_video_idle( struct dc_link *link, + const struct link_resource *link_res, struct link_training_settings *lt_settings, enum link_training_result status) { union lane_count_set lane_count_set = {0}; /* 4. mainlink output idle pattern*/ - dp_set_hw_test_pattern(link, DP_TEST_PATTERN_VIDEO_MODE, NULL, 0); + dp_set_hw_test_pattern(link, link_res, DP_TEST_PATTERN_VIDEO_MODE, NULL, 0); /* * 5. post training adjust if required @@ -1393,11 +1381,7 @@ static inline enum link_training_result dp_transition_to_video_idle( * TPS4 must be used instead of POST_LT_ADJ_REQ. */ if (link->dpcd_caps.max_ln_count.bits.POST_LT_ADJ_REQ_SUPPORTED != 1 || -#if defined(CONFIG_DRM_AMD_DC_DCN) lt_settings->pattern_for_eq >= DP_TRAINING_PATTERN_SEQUENCE_4) { -#else - lt_settings->pattern_for_eq == DP_TRAINING_PATTERN_SEQUENCE_4) { -#endif /* delay 5ms after Main Link output idle pattern and then check * DPCD 0202h. */ @@ -1409,7 +1393,7 @@ static inline enum link_training_result dp_transition_to_video_idle( } if (status == LINK_TRAINING_SUCCESS && - perform_post_lt_adj_req_sequence(link, lt_settings) == false) + perform_post_lt_adj_req_sequence(link, link_res, lt_settings) == false) status = LINK_TRAINING_LQA_FAIL; lane_count_set.bits.LANE_COUNT_SET = lt_settings->link_settings.lane_count; @@ -1484,7 +1468,6 @@ static inline void decide_8b_10b_training_settings( */ lt_settings->link_settings.link_spread = link->dp_ss_off ? LINK_SPREAD_DISABLED : LINK_SPREAD_05_DOWNSPREAD_30KHZ; - lt_settings->lttpr_mode = link->lttpr_mode; lt_settings->cr_pattern_time = get_cr_training_aux_rd_interval(link, link_setting); lt_settings->eq_pattern_time = get_eq_training_aux_rd_interval(link, link_setting); lt_settings->pattern_for_cr = decide_cr_training_pattern(link_setting); @@ -1493,10 +1476,10 @@ static inline void decide_8b_10b_training_settings( lt_settings->should_set_fec_ready = true; lt_settings->disallow_per_lane_settings = true; lt_settings->always_match_dpcd_with_hw_lane_settings = true; + lt_settings->lttpr_mode = dp_decide_8b_10b_lttpr_mode(link); dp_hw_to_dpcd_lane_settings(lt_settings, lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings); } -#if defined(CONFIG_DRM_AMD_DC_DCN) static inline void decide_128b_132b_training_settings(struct dc_link *link, const struct dc_link_settings *link_settings, struct link_training_settings *lt_settings) @@ -1517,13 +1500,11 @@ static inline void decide_128b_132b_training_settings(struct dc_link *link, lt_settings->cds_pattern_time = 2500; lt_settings->cds_wait_time_limit = (dp_convert_to_count( link->dpcd_caps.lttpr_caps.phy_repeater_cnt) + 1) * 20000; - lt_settings->lttpr_mode = dp_convert_to_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt) ? - LTTPR_MODE_NON_TRANSPARENT : LTTPR_MODE_TRANSPARENT; lt_settings->disallow_per_lane_settings = true; + lt_settings->lttpr_mode = dp_decide_128b_132b_lttpr_mode(link); dp_hw_to_dpcd_lane_settings(lt_settings, lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings); } -#endif void dp_decide_training_settings( struct dc_link *link, @@ -1532,10 +1513,8 @@ void dp_decide_training_settings( { if (dp_get_link_encoding_format(link_settings) == DP_8b_10b_ENCODING) decide_8b_10b_training_settings(link, link_settings, lt_settings); -#if defined(CONFIG_DRM_AMD_DC_DCN) else if (dp_get_link_encoding_format(link_settings) == DP_128b_132b_ENCODING) decide_128b_132b_training_settings(link, link_settings, lt_settings); -#endif } static void override_training_settings( @@ -1558,34 +1537,33 @@ static void override_training_settings( lt_settings->pre_emphasis = overrides->pre_emphasis; if (overrides->post_cursor2 != NULL) lt_settings->post_cursor2 = overrides->post_cursor2; -#if defined(CONFIG_DRM_AMD_DC_DCN) if (overrides->ffe_preset != NULL) lt_settings->ffe_preset = overrides->ffe_preset; -#endif /* Override HW lane settings with BIOS forced values if present */ if (link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN && - link->lttpr_mode == LTTPR_MODE_TRANSPARENT) { + lt_settings->lttpr_mode == LTTPR_MODE_TRANSPARENT) { lt_settings->voltage_swing = &link->bios_forced_drive_settings.VOLTAGE_SWING; lt_settings->pre_emphasis = &link->bios_forced_drive_settings.PRE_EMPHASIS; lt_settings->always_match_dpcd_with_hw_lane_settings = false; } for (lane = 0; lane < LANE_COUNT_DP_MAX; lane++) { - lt_settings->lane_settings[lane].VOLTAGE_SWING = + lt_settings->hw_lane_settings[lane].VOLTAGE_SWING = lt_settings->voltage_swing != NULL ? *lt_settings->voltage_swing : VOLTAGE_SWING_LEVEL0; - lt_settings->lane_settings[lane].PRE_EMPHASIS = + lt_settings->hw_lane_settings[lane].PRE_EMPHASIS = lt_settings->pre_emphasis != NULL ? *lt_settings->pre_emphasis : PRE_EMPHASIS_DISABLED; - lt_settings->lane_settings[lane].POST_CURSOR2 = + lt_settings->hw_lane_settings[lane].POST_CURSOR2 = lt_settings->post_cursor2 != NULL ? *lt_settings->post_cursor2 : POST_CURSOR2_DISABLED; } - dp_hw_to_dpcd_lane_settings(lt_settings, - lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings); + if (lt_settings->always_match_dpcd_with_hw_lane_settings) + dp_hw_to_dpcd_lane_settings(lt_settings, + lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings); /* Initialize training timings */ if (overrides->cr_pattern_time != NULL) @@ -1604,6 +1582,15 @@ static void override_training_settings( if (link->preferred_training_settings.fec_enable != NULL) lt_settings->should_set_fec_ready = *link->preferred_training_settings.fec_enable; + + #if defined(CONFIG_DRM_AMD_DC_DCN) + /* Check DP tunnel LTTPR mode debug option. */ + if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA && link->dc->debug.dpia_debug.bits.force_non_lttpr) + lt_settings->lttpr_mode = LTTPR_MODE_NON_LTTPR; + +#endif + dp_get_lttpr_mode_override(link, <_settings->lttpr_mode); + } uint8_t dp_convert_to_count(uint8_t lttpr_repeater_count) @@ -1669,7 +1656,7 @@ static enum dc_status configure_lttpr_mode_non_transparent( link->dpcd_caps.lttpr_caps.mode = repeater_mode; } - if (link->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) { + if (lt_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) { DC_LOG_HW_LINK_TRAINING("%s\n Set LTTPR to Non Transparent Mode\n", __func__); @@ -1765,7 +1752,6 @@ static void print_status_message( case LINK_RATE_HIGH3: link_rate = "HBR3"; break; -#if defined(CONFIG_DRM_AMD_DC_DCN) case LINK_RATE_UHBR10: link_rate = "UHBR10"; break; @@ -1775,7 +1761,6 @@ static void print_status_message( case LINK_RATE_UHBR20: link_rate = "UHBR20"; break; -#endif default: break; } @@ -1796,6 +1781,9 @@ static void print_status_message( case LINK_TRAINING_EQ_FAIL_CR: lt_result = "CR failed in EQ"; break; + case LINK_TRAINING_EQ_FAIL_CR_PARTIAL: + lt_result = "CR failed in EQ partially"; + break; case LINK_TRAINING_EQ_FAIL_EQ: lt_result = "EQ failed"; break; @@ -1805,7 +1793,6 @@ static void print_status_message( case LINK_TRAINING_LINK_LOSS: lt_result = "Link loss"; break; -#if defined(CONFIG_DRM_AMD_DC_DCN) case DP_128b_132b_LT_FAILED: lt_result = "LT_FAILED received"; break; @@ -1818,7 +1805,6 @@ static void print_status_message( case DP_128b_132b_CDS_DONE_TIMEOUT: lt_result = "CDS timeout"; break; -#endif default: break; } @@ -1838,24 +1824,25 @@ static void print_status_message( } /* Connectivity log: link training */ -#if defined(CONFIG_DRM_AMD_DC_DCN) + /* TODO - DP2.0 Log: add connectivity log for FFE PRESET */ -#endif + CONN_MSG_LT(link, "%sx%d %s VS=%d, PE=%d, DS=%s", link_rate, lt_settings->link_settings.lane_count, lt_result, - lt_settings->lane_settings[0].VOLTAGE_SWING, - lt_settings->lane_settings[0].PRE_EMPHASIS, + lt_settings->hw_lane_settings[0].VOLTAGE_SWING, + lt_settings->hw_lane_settings[0].PRE_EMPHASIS, lt_spread); } void dc_link_dp_set_drive_settings( struct dc_link *link, + const struct link_resource *link_res, struct link_training_settings *lt_settings) { /* program ASIC PHY settings*/ - dp_set_hw_lane_settings(link, lt_settings, DPRX); + dp_set_hw_lane_settings(link, link_res, lt_settings, DPRX); dp_hw_to_dpcd_lane_settings(lt_settings, lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings); @@ -1866,6 +1853,7 @@ void dc_link_dp_set_drive_settings( bool dc_link_dp_perform_link_training_skip_aux( struct dc_link *link, + const struct link_resource *link_res, const struct dc_link_settings *link_setting) { struct link_training_settings lt_settings = {0}; @@ -1882,10 +1870,10 @@ bool dc_link_dp_perform_link_training_skip_aux( /* 1. Perform_clock_recovery_sequence. */ /* transmit training pattern for clock recovery */ - dp_set_hw_training_pattern(link, lt_settings.pattern_for_cr, DPRX); + dp_set_hw_training_pattern(link, link_res, lt_settings.pattern_for_cr, DPRX); /* call HWSS to set lane settings*/ - dp_set_hw_lane_settings(link, <_settings, DPRX); + dp_set_hw_lane_settings(link, link_res, <_settings, DPRX); /* wait receiver to lock-on*/ dp_wait_for_training_aux_rd_interval(link, lt_settings.cr_pattern_time); @@ -1893,10 +1881,10 @@ bool dc_link_dp_perform_link_training_skip_aux( /* 2. Perform_channel_equalization_sequence. */ /* transmit training pattern for channel equalization. */ - dp_set_hw_training_pattern(link, lt_settings.pattern_for_eq, DPRX); + dp_set_hw_training_pattern(link, link_res, lt_settings.pattern_for_eq, DPRX); /* call HWSS to set lane settings*/ - dp_set_hw_lane_settings(link, <_settings, DPRX); + dp_set_hw_lane_settings(link, link_res, <_settings, DPRX); /* wait receiver to lock-on. */ dp_wait_for_training_aux_rd_interval(link, lt_settings.eq_pattern_time); @@ -1904,7 +1892,7 @@ bool dc_link_dp_perform_link_training_skip_aux( /* 3. Perform_link_training_int. */ /* Mainlink output idle pattern. */ - dp_set_hw_test_pattern(link, DP_TEST_PATTERN_VIDEO_MODE, NULL, 0); + dp_set_hw_test_pattern(link, link_res, DP_TEST_PATTERN_VIDEO_MODE, NULL, 0); print_status_message(link, <_settings, LINK_TRAINING_SUCCESS); @@ -1926,15 +1914,12 @@ enum dc_status dpcd_configure_lttpr_mode(struct dc_link *link, struct link_train static void dpcd_exit_training_mode(struct dc_link *link) { -#if defined(CONFIG_DRM_AMD_DC_DCN) uint8_t sink_status = 0; uint8_t i; -#endif /* clear training pattern set */ dpcd_set_training_pattern(link, DP_TRAINING_PATTERN_VIDEOIDLE); -#if defined(CONFIG_DRM_AMD_DC_DCN) /* poll for intra-hop disable */ for (i = 0; i < 10; i++) { if ((core_link_read_dpcd(link, DP_SINK_STATUS, &sink_status, 1) == DC_OK) && @@ -1942,7 +1927,6 @@ static void dpcd_exit_training_mode(struct dc_link *link) break; udelay(1000); } -#endif } enum dc_status dpcd_configure_channel_coding(struct dc_link *link, @@ -1966,7 +1950,6 @@ enum dc_status dpcd_configure_channel_coding(struct dc_link *link, return status; } -#if defined(CONFIG_DRM_AMD_DC_DCN) static void dpcd_128b_132b_get_aux_rd_interval(struct dc_link *link, uint32_t *interval_in_us) { @@ -1985,6 +1968,7 @@ static void dpcd_128b_132b_get_aux_rd_interval(struct dc_link *link, static enum link_training_result dp_perform_128b_132b_channel_eq_done_sequence( struct dc_link *link, + const struct link_resource *link_res, struct link_training_settings *lt_settings) { uint8_t loop_count; @@ -1992,11 +1976,12 @@ static enum link_training_result dp_perform_128b_132b_channel_eq_done_sequence( uint32_t wait_time = 0; union lane_align_status_updated dpcd_lane_status_updated = {0}; union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX] = {0}; - enum link_training_result status = LINK_TRAINING_SUCCESS; + enum dc_status status = DC_OK; + enum link_training_result result = LINK_TRAINING_SUCCESS; union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = {0}; /* Transmit 128b/132b_TPS1 over Main-Link */ - dp_set_hw_training_pattern(link, lt_settings->pattern_for_cr, DPRX); + dp_set_hw_training_pattern(link, link_res, lt_settings->pattern_for_cr, DPRX); /* Set TRAINING_PATTERN_SET to 01h */ dpcd_set_training_pattern(link, lt_settings->pattern_for_cr); @@ -2006,8 +1991,8 @@ static enum link_training_result dp_perform_128b_132b_channel_eq_done_sequence( &dpcd_lane_status_updated, dpcd_lane_adjust, DPRX); dp_decide_lane_settings(lt_settings, dpcd_lane_adjust, lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings); - dp_set_hw_lane_settings(link, lt_settings, DPRX); - dp_set_hw_training_pattern(link, lt_settings->pattern_for_eq, DPRX); + dp_set_hw_lane_settings(link, link_res, lt_settings, DPRX); + dp_set_hw_training_pattern(link, link_res, lt_settings->pattern_for_eq, DPRX); /* Set loop counter to start from 1 */ loop_count = 1; @@ -2017,88 +2002,96 @@ static enum link_training_result dp_perform_128b_132b_channel_eq_done_sequence( lt_settings->pattern_for_eq, DPRX); /* poll for channel EQ done */ - while (status == LINK_TRAINING_SUCCESS) { + while (result == LINK_TRAINING_SUCCESS) { dp_wait_for_training_aux_rd_interval(link, aux_rd_interval); wait_time += aux_rd_interval; - dp_get_lane_status_and_lane_adjust(link, lt_settings, dpcd_lane_status, + status = dp_get_lane_status_and_lane_adjust(link, lt_settings, dpcd_lane_status, &dpcd_lane_status_updated, dpcd_lane_adjust, DPRX); dp_decide_lane_settings(lt_settings, dpcd_lane_adjust, lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings); dpcd_128b_132b_get_aux_rd_interval(link, &aux_rd_interval); - if (dp_is_ch_eq_done(lt_settings->link_settings.lane_count, + if (status != DC_OK) { + result = LINK_TRAINING_ABORT; + } else if (dp_is_ch_eq_done(lt_settings->link_settings.lane_count, dpcd_lane_status)) { /* pass */ break; } else if (loop_count >= lt_settings->eq_loop_count_limit) { - status = DP_128b_132b_MAX_LOOP_COUNT_REACHED; + result = DP_128b_132b_MAX_LOOP_COUNT_REACHED; } else if (dpcd_lane_status_updated.bits.LT_FAILED_128b_132b) { - status = DP_128b_132b_LT_FAILED; + result = DP_128b_132b_LT_FAILED; } else { - dp_set_hw_lane_settings(link, lt_settings, DPRX); - dpcd_set_lane_settings(link, lt_settings, DPRX); + dp_set_hw_lane_settings(link, link_res, lt_settings, DPRX); + dpcd_128b_132b_set_lane_settings(link, lt_settings); } loop_count++; } /* poll for EQ interlane align done */ - while (status == LINK_TRAINING_SUCCESS) { - if (dpcd_lane_status_updated.bits.EQ_INTERLANE_ALIGN_DONE_128b_132b) { + while (result == LINK_TRAINING_SUCCESS) { + if (status != DC_OK) { + result = LINK_TRAINING_ABORT; + } else if (dpcd_lane_status_updated.bits.EQ_INTERLANE_ALIGN_DONE_128b_132b) { /* pass */ break; } else if (wait_time >= lt_settings->eq_wait_time_limit) { - status = DP_128b_132b_CHANNEL_EQ_DONE_TIMEOUT; + result = DP_128b_132b_CHANNEL_EQ_DONE_TIMEOUT; } else if (dpcd_lane_status_updated.bits.LT_FAILED_128b_132b) { - status = DP_128b_132b_LT_FAILED; + result = DP_128b_132b_LT_FAILED; } else { dp_wait_for_training_aux_rd_interval(link, lt_settings->eq_pattern_time); wait_time += lt_settings->eq_pattern_time; - dp_get_lane_status_and_lane_adjust(link, lt_settings, dpcd_lane_status, + status = dp_get_lane_status_and_lane_adjust(link, lt_settings, dpcd_lane_status, &dpcd_lane_status_updated, dpcd_lane_adjust, DPRX); } } - return status; + return result; } static enum link_training_result dp_perform_128b_132b_cds_done_sequence( struct dc_link *link, + const struct link_resource *link_res, struct link_training_settings *lt_settings) { /* Assumption: assume hardware has transmitted eq pattern */ - enum link_training_result status = LINK_TRAINING_SUCCESS; + enum dc_status status = DC_OK; + enum link_training_result result = LINK_TRAINING_SUCCESS; union lane_align_status_updated dpcd_lane_status_updated = {0}; union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX] = {0}; - union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = { { {0} } }; + union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = {0}; uint32_t wait_time = 0; /* initiate CDS done sequence */ dpcd_set_training_pattern(link, lt_settings->pattern_for_cds); /* poll for CDS interlane align done and symbol lock */ - while (status == LINK_TRAINING_SUCCESS) { + while (result == LINK_TRAINING_SUCCESS) { dp_wait_for_training_aux_rd_interval(link, lt_settings->cds_pattern_time); wait_time += lt_settings->cds_pattern_time; - dp_get_lane_status_and_lane_adjust(link, lt_settings, dpcd_lane_status, + status = dp_get_lane_status_and_lane_adjust(link, lt_settings, dpcd_lane_status, &dpcd_lane_status_updated, dpcd_lane_adjust, DPRX); - if (dp_is_symbol_locked(lt_settings->link_settings.lane_count, dpcd_lane_status) && + if (status != DC_OK) { + result = LINK_TRAINING_ABORT; + } else if (dp_is_symbol_locked(lt_settings->link_settings.lane_count, dpcd_lane_status) && dpcd_lane_status_updated.bits.CDS_INTERLANE_ALIGN_DONE_128b_132b) { /* pass */ break; } else if (dpcd_lane_status_updated.bits.LT_FAILED_128b_132b) { - status = DP_128b_132b_LT_FAILED; + result = DP_128b_132b_LT_FAILED; } else if (wait_time >= lt_settings->cds_wait_time_limit) { - status = DP_128b_132b_CDS_DONE_TIMEOUT; + result = DP_128b_132b_CDS_DONE_TIMEOUT; } } - return status; + return result; } -#endif static enum link_training_result dp_perform_8b_10b_link_training( struct dc_link *link, + const struct link_resource *link_res, struct link_training_settings *lt_settings) { enum link_training_result status = LINK_TRAINING_SUCCESS; @@ -2108,12 +2101,12 @@ static enum link_training_result dp_perform_8b_10b_link_training( uint8_t lane = 0; if (link->ctx->dc->work_arounds.lt_early_cr_pattern) - start_clock_recovery_pattern_early(link, lt_settings, DPRX); + start_clock_recovery_pattern_early(link, link_res, lt_settings, DPRX); /* 1. set link rate, lane count and spread. */ dpcd_set_link_settings(link, lt_settings); - if (link->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) { + if (lt_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) { /* 2. perform link training (set link training done * to false is done as well) @@ -2122,40 +2115,47 @@ static enum link_training_result dp_perform_8b_10b_link_training( for (repeater_id = repeater_cnt; (repeater_id > 0 && status == LINK_TRAINING_SUCCESS); repeater_id--) { - status = perform_clock_recovery_sequence(link, lt_settings, repeater_id); + status = perform_clock_recovery_sequence(link, link_res, lt_settings, repeater_id); - if (status != LINK_TRAINING_SUCCESS) + if (status != LINK_TRAINING_SUCCESS) { + repeater_training_done(link, repeater_id); break; + } status = perform_channel_equalization_sequence(link, + link_res, lt_settings, repeater_id); + repeater_training_done(link, repeater_id); + if (status != LINK_TRAINING_SUCCESS) break; - repeater_training_done(link, repeater_id); + for (lane = 0; lane < LANE_COUNT_DP_MAX; lane++) { + lt_settings->dpcd_lane_settings[lane].raw = 0; + lt_settings->hw_lane_settings[lane].VOLTAGE_SWING = 0; + lt_settings->hw_lane_settings[lane].PRE_EMPHASIS = 0; + } } - - for (lane = 0; lane < (uint8_t)lt_settings->link_settings.lane_count; lane++) - lt_settings->dpcd_lane_settings[lane].raw = 0; } if (status == LINK_TRAINING_SUCCESS) { - status = perform_clock_recovery_sequence(link, lt_settings, DPRX); - if (status == LINK_TRAINING_SUCCESS) { - status = perform_channel_equalization_sequence(link, - lt_settings, - DPRX); + status = perform_clock_recovery_sequence(link, link_res, lt_settings, DPRX); + if (status == LINK_TRAINING_SUCCESS) { + status = perform_channel_equalization_sequence(link, + link_res, + lt_settings, + DPRX); } } return status; } -#if defined(CONFIG_DRM_AMD_DC_DCN) static enum link_training_result dp_perform_128b_132b_link_training( struct dc_link *link, + const struct link_resource *link_res, struct link_training_settings *lt_settings) { enum link_training_result result = LINK_TRAINING_SUCCESS; @@ -2167,23 +2167,468 @@ static enum link_training_result dp_perform_128b_132b_link_training( decide_8b_10b_training_settings(link, <_settings->link_settings, &legacy_settings); - return dp_perform_8b_10b_link_training(link, &legacy_settings); + return dp_perform_8b_10b_link_training(link, link_res, &legacy_settings); } dpcd_set_link_settings(link, lt_settings); if (result == LINK_TRAINING_SUCCESS) - result = dp_perform_128b_132b_channel_eq_done_sequence(link, lt_settings); + result = dp_perform_128b_132b_channel_eq_done_sequence(link, link_res, lt_settings); if (result == LINK_TRAINING_SUCCESS) - result = dp_perform_128b_132b_cds_done_sequence(link, lt_settings); + result = dp_perform_128b_132b_cds_done_sequence(link, link_res, lt_settings); return result; } -#endif + +static enum link_training_result perform_fixed_vs_pe_nontransparent_training_sequence( + struct dc_link *link, + const struct link_resource *link_res, + struct link_training_settings *lt_settings) +{ + enum link_training_result status = LINK_TRAINING_SUCCESS; + uint8_t lane = 0; + uint8_t toggle_rate = 0x6; + uint8_t target_rate = 0x6; + bool apply_toggle_rate_wa = false; + uint8_t repeater_cnt; + uint8_t repeater_id; + + /* Fixed VS/PE specific: Force CR AUX RD Interval to at least 16ms */ + if (lt_settings->cr_pattern_time < 16000) + lt_settings->cr_pattern_time = 16000; + + /* Fixed VS/PE specific: Toggle link rate */ + apply_toggle_rate_wa = (link->vendor_specific_lttpr_link_rate_wa == target_rate); + target_rate = get_dpcd_link_rate(<_settings->link_settings); + toggle_rate = (target_rate == 0x6) ? 0xA : 0x6; + + if (apply_toggle_rate_wa) + lt_settings->link_settings.link_rate = toggle_rate; + + if (link->ctx->dc->work_arounds.lt_early_cr_pattern) + start_clock_recovery_pattern_early(link, link_res, lt_settings, DPRX); + + /* 1. set link rate, lane count and spread. */ + dpcd_set_link_settings(link, lt_settings); + + /* Fixed VS/PE specific: Toggle link rate back*/ + if (apply_toggle_rate_wa) { + core_link_write_dpcd( + link, + DP_LINK_BW_SET, + &target_rate, + 1); + } + + link->vendor_specific_lttpr_link_rate_wa = target_rate; + + if (lt_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) { + + /* 2. perform link training (set link training done + * to false is done as well) + */ + repeater_cnt = dp_convert_to_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt); + + for (repeater_id = repeater_cnt; (repeater_id > 0 && status == LINK_TRAINING_SUCCESS); + repeater_id--) { + status = perform_clock_recovery_sequence(link, link_res, lt_settings, repeater_id); + + if (status != LINK_TRAINING_SUCCESS) { + repeater_training_done(link, repeater_id); + break; + } + + status = perform_channel_equalization_sequence(link, + link_res, + lt_settings, + repeater_id); + + repeater_training_done(link, repeater_id); + + if (status != LINK_TRAINING_SUCCESS) + break; + + for (lane = 0; lane < LANE_COUNT_DP_MAX; lane++) { + lt_settings->dpcd_lane_settings[lane].raw = 0; + lt_settings->hw_lane_settings[lane].VOLTAGE_SWING = 0; + lt_settings->hw_lane_settings[lane].PRE_EMPHASIS = 0; + } + } + } + + if (status == LINK_TRAINING_SUCCESS) { + status = perform_clock_recovery_sequence(link, link_res, lt_settings, DPRX); + if (status == LINK_TRAINING_SUCCESS) { + status = perform_channel_equalization_sequence(link, + link_res, + lt_settings, + DPRX); + } + } + + return status; +} + +static enum link_training_result dp_perform_fixed_vs_pe_training_sequence( + struct dc_link *link, + const struct link_resource *link_res, + struct link_training_settings *lt_settings) +{ + const uint8_t vendor_lttpr_write_data_reset[4] = {0x1, 0x50, 0x63, 0xFF}; + const uint8_t offset = dp_convert_to_count( + link->dpcd_caps.lttpr_caps.phy_repeater_cnt); + const uint8_t vendor_lttpr_write_data_intercept_en[4] = {0x1, 0x55, 0x63, 0x0}; + const uint8_t vendor_lttpr_write_data_intercept_dis[4] = {0x1, 0x55, 0x63, 0x68}; + uint32_t pre_disable_intercept_delay_ms = link->dc->debug.fixed_vs_aux_delay_config_wa; + uint8_t vendor_lttpr_write_data_vs[4] = {0x1, 0x51, 0x63, 0x0}; + uint8_t vendor_lttpr_write_data_pe[4] = {0x1, 0x52, 0x63, 0x0}; + uint32_t vendor_lttpr_write_address = 0xF004F; + enum link_training_result status = LINK_TRAINING_SUCCESS; + uint8_t lane = 0; + union down_spread_ctrl downspread = {0}; + union lane_count_set lane_count_set = {0}; + uint8_t toggle_rate; + uint8_t rate; + + /* Only 8b/10b is supported */ + ASSERT(dp_get_link_encoding_format(<_settings->link_settings) == + DP_8b_10b_ENCODING); + + if (lt_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) { + status = perform_fixed_vs_pe_nontransparent_training_sequence(link, link_res, lt_settings); + return status; + } + + if (offset != 0xFF) { + vendor_lttpr_write_address += + ((DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE) * (offset - 1)); + + /* Certain display and cable configuration require extra delay */ + if (offset > 2) + pre_disable_intercept_delay_ms = link->dc->debug.fixed_vs_aux_delay_config_wa * 2; + } + + /* Vendor specific: Reset lane settings */ + core_link_write_dpcd( + link, + vendor_lttpr_write_address, + &vendor_lttpr_write_data_reset[0], + sizeof(vendor_lttpr_write_data_reset)); + core_link_write_dpcd( + link, + vendor_lttpr_write_address, + &vendor_lttpr_write_data_vs[0], + sizeof(vendor_lttpr_write_data_vs)); + core_link_write_dpcd( + link, + vendor_lttpr_write_address, + &vendor_lttpr_write_data_pe[0], + sizeof(vendor_lttpr_write_data_pe)); + + /* Vendor specific: Enable intercept */ + core_link_write_dpcd( + link, + vendor_lttpr_write_address, + &vendor_lttpr_write_data_intercept_en[0], + sizeof(vendor_lttpr_write_data_intercept_en)); + + /* 1. set link rate, lane count and spread. */ + + downspread.raw = (uint8_t)(lt_settings->link_settings.link_spread); + + lane_count_set.bits.LANE_COUNT_SET = + lt_settings->link_settings.lane_count; + + lane_count_set.bits.ENHANCED_FRAMING = lt_settings->enhanced_framing; + lane_count_set.bits.POST_LT_ADJ_REQ_GRANTED = 0; + + + if (lt_settings->pattern_for_eq < DP_TRAINING_PATTERN_SEQUENCE_4) { + lane_count_set.bits.POST_LT_ADJ_REQ_GRANTED = + link->dpcd_caps.max_ln_count.bits.POST_LT_ADJ_REQ_SUPPORTED; + } + + core_link_write_dpcd(link, DP_DOWNSPREAD_CTRL, + &downspread.raw, sizeof(downspread)); + + core_link_write_dpcd(link, DP_LANE_COUNT_SET, + &lane_count_set.raw, 1); + + rate = get_dpcd_link_rate(<_settings->link_settings); + + /* Vendor specific: Toggle link rate */ + toggle_rate = (rate == 0x6) ? 0xA : 0x6; + + if (link->vendor_specific_lttpr_link_rate_wa == rate) { + core_link_write_dpcd( + link, + DP_LINK_BW_SET, + &toggle_rate, + 1); + } + + link->vendor_specific_lttpr_link_rate_wa = rate; + + core_link_write_dpcd(link, DP_LINK_BW_SET, &rate, 1); + + DC_LOG_HW_LINK_TRAINING("%s\n %x rate = %x\n %x lane = %x framing = %x\n %x spread = %x\n", + __func__, + DP_LINK_BW_SET, + lt_settings->link_settings.link_rate, + DP_LANE_COUNT_SET, + lt_settings->link_settings.lane_count, + lt_settings->enhanced_framing, + DP_DOWNSPREAD_CTRL, + lt_settings->link_settings.link_spread); + + /* 2. Perform link training */ + + /* Perform Clock Recovery Sequence */ + if (status == LINK_TRAINING_SUCCESS) { + const uint8_t max_vendor_dpcd_retries = 10; + uint32_t retries_cr; + uint32_t retry_count; + uint32_t wait_time_microsec; + enum dc_lane_count lane_count = lt_settings->link_settings.lane_count; + union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX]; + union lane_align_status_updated dpcd_lane_status_updated; + union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = {0}; + enum dc_status dpcd_status = DC_OK; + uint8_t i = 0; + + retries_cr = 0; + retry_count = 0; + + memset(&dpcd_lane_status, '\0', sizeof(dpcd_lane_status)); + memset(&dpcd_lane_status_updated, '\0', + sizeof(dpcd_lane_status_updated)); + + while ((retries_cr < LINK_TRAINING_MAX_RETRY_COUNT) && + (retry_count < LINK_TRAINING_MAX_CR_RETRY)) { + + + /* 1. call HWSS to set lane settings */ + dp_set_hw_lane_settings( + link, + link_res, + lt_settings, + 0); + + /* 2. update DPCD of the receiver */ + if (!retry_count) { + /* EPR #361076 - write as a 5-byte burst, + * but only for the 1-st iteration. + */ + dpcd_set_lt_pattern_and_lane_settings( + link, + lt_settings, + lt_settings->pattern_for_cr, + 0); + /* Vendor specific: Disable intercept */ + for (i = 0; i < max_vendor_dpcd_retries; i++) { + msleep(pre_disable_intercept_delay_ms); + dpcd_status = core_link_write_dpcd( + link, + vendor_lttpr_write_address, + &vendor_lttpr_write_data_intercept_dis[0], + sizeof(vendor_lttpr_write_data_intercept_dis)); + + if (dpcd_status == DC_OK) + break; + + core_link_write_dpcd( + link, + vendor_lttpr_write_address, + &vendor_lttpr_write_data_intercept_en[0], + sizeof(vendor_lttpr_write_data_intercept_en)); + } + } else { + vendor_lttpr_write_data_vs[3] = 0; + vendor_lttpr_write_data_pe[3] = 0; + + for (lane = 0; lane < lane_count; lane++) { + vendor_lttpr_write_data_vs[3] |= + lt_settings->dpcd_lane_settings[lane].bits.VOLTAGE_SWING_SET << (2 * lane); + vendor_lttpr_write_data_pe[3] |= + lt_settings->dpcd_lane_settings[lane].bits.PRE_EMPHASIS_SET << (2 * lane); + } + + /* Vendor specific: Update VS and PE to DPRX requested value */ + core_link_write_dpcd( + link, + vendor_lttpr_write_address, + &vendor_lttpr_write_data_vs[0], + sizeof(vendor_lttpr_write_data_vs)); + core_link_write_dpcd( + link, + vendor_lttpr_write_address, + &vendor_lttpr_write_data_pe[0], + sizeof(vendor_lttpr_write_data_pe)); + + dpcd_set_lane_settings( + link, + lt_settings, + 0); + } + + /* 3. wait receiver to lock-on*/ + wait_time_microsec = lt_settings->cr_pattern_time; + + dp_wait_for_training_aux_rd_interval( + link, + wait_time_microsec); + + /* 4. Read lane status and requested drive + * settings as set by the sink + */ + dp_get_lane_status_and_lane_adjust( + link, + lt_settings, + dpcd_lane_status, + &dpcd_lane_status_updated, + dpcd_lane_adjust, + 0); + + /* 5. check CR done*/ + if (dp_is_cr_done(lane_count, dpcd_lane_status)) { + status = LINK_TRAINING_SUCCESS; + break; + } + + /* 6. max VS reached*/ + if (dp_is_max_vs_reached(lt_settings)) + break; + + /* 7. same lane settings */ + /* Note: settings are the same for all lanes, + * so comparing first lane is sufficient + */ + if (lt_settings->dpcd_lane_settings[0].bits.VOLTAGE_SWING_SET == + dpcd_lane_adjust[0].bits.VOLTAGE_SWING_LANE) + retries_cr++; + else + retries_cr = 0; + + /* 8. update VS/PE/PC2 in lt_settings*/ + dp_decide_lane_settings(lt_settings, dpcd_lane_adjust, + lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings); + retry_count++; + } + + if (retry_count >= LINK_TRAINING_MAX_CR_RETRY) { + ASSERT(0); + DC_LOG_ERROR("%s: Link Training Error, could not get CR after %d tries. Possibly voltage swing issue", + __func__, + LINK_TRAINING_MAX_CR_RETRY); + + } + + status = dp_get_cr_failure(lane_count, dpcd_lane_status); + } + + /* Perform Channel EQ Sequence */ + if (status == LINK_TRAINING_SUCCESS) { + enum dc_dp_training_pattern tr_pattern; + uint32_t retries_ch_eq; + uint32_t wait_time_microsec; + enum dc_lane_count lane_count = lt_settings->link_settings.lane_count; + union lane_align_status_updated dpcd_lane_status_updated = {0}; + union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX] = {0}; + union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = {0}; + + /* Note: also check that TPS4 is a supported feature*/ + tr_pattern = lt_settings->pattern_for_eq; + + dp_set_hw_training_pattern(link, link_res, tr_pattern, 0); + + status = LINK_TRAINING_EQ_FAIL_EQ; + + for (retries_ch_eq = 0; retries_ch_eq <= LINK_TRAINING_MAX_RETRY_COUNT; + retries_ch_eq++) { + + dp_set_hw_lane_settings(link, link_res, lt_settings, 0); + + vendor_lttpr_write_data_vs[3] = 0; + vendor_lttpr_write_data_pe[3] = 0; + + for (lane = 0; lane < lane_count; lane++) { + vendor_lttpr_write_data_vs[3] |= + lt_settings->dpcd_lane_settings[lane].bits.VOLTAGE_SWING_SET << (2 * lane); + vendor_lttpr_write_data_pe[3] |= + lt_settings->dpcd_lane_settings[lane].bits.PRE_EMPHASIS_SET << (2 * lane); + } + + /* Vendor specific: Update VS and PE to DPRX requested value */ + core_link_write_dpcd( + link, + vendor_lttpr_write_address, + &vendor_lttpr_write_data_vs[0], + sizeof(vendor_lttpr_write_data_vs)); + core_link_write_dpcd( + link, + vendor_lttpr_write_address, + &vendor_lttpr_write_data_pe[0], + sizeof(vendor_lttpr_write_data_pe)); + + /* 2. update DPCD*/ + if (!retries_ch_eq) + /* EPR #361076 - write as a 5-byte burst, + * but only for the 1-st iteration + */ + + dpcd_set_lt_pattern_and_lane_settings( + link, + lt_settings, + tr_pattern, 0); + else + dpcd_set_lane_settings(link, lt_settings, 0); + + /* 3. wait for receiver to lock-on*/ + wait_time_microsec = lt_settings->eq_pattern_time; + + dp_wait_for_training_aux_rd_interval( + link, + wait_time_microsec); + + /* 4. Read lane status and requested + * drive settings as set by the sink + */ + dp_get_lane_status_and_lane_adjust( + link, + lt_settings, + dpcd_lane_status, + &dpcd_lane_status_updated, + dpcd_lane_adjust, + 0); + + /* 5. check CR done*/ + if (!dp_is_cr_done(lane_count, dpcd_lane_status)) { + status = LINK_TRAINING_EQ_FAIL_CR; + break; + } + + /* 6. check CHEQ done*/ + if (dp_is_ch_eq_done(lane_count, dpcd_lane_status) && + dp_is_symbol_locked(lane_count, dpcd_lane_status) && + dp_is_interlane_aligned(dpcd_lane_status_updated)) { + status = LINK_TRAINING_SUCCESS; + break; + } + + /* 7. update VS/PE/PC2 in lt_settings*/ + dp_decide_lane_settings(lt_settings, dpcd_lane_adjust, + lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings); + } + } + + return status; +} + enum link_training_result dc_link_dp_perform_link_training( struct dc_link *link, + const struct link_resource *link_res, const struct dc_link_settings *link_settings, bool skip_video_pattern) { @@ -2197,6 +2642,7 @@ enum link_training_result dc_link_dp_perform_link_training( link, link_settings, <_settings); + override_training_settings( link, &link->preferred_training_settings, @@ -2207,26 +2653,29 @@ enum link_training_result dc_link_dp_perform_link_training( /* configure link prior to entering training mode */ dpcd_configure_lttpr_mode(link, <_settings); - dp_set_fec_ready(link, lt_settings.should_set_fec_ready); + dp_set_fec_ready(link, link_res, lt_settings.should_set_fec_ready); dpcd_configure_channel_coding(link, <_settings); /* enter training mode: * Per DP specs starting from here, DPTX device shall not issue * Non-LT AUX transactions inside training mode. */ - if (encoding == DP_8b_10b_ENCODING) - status = dp_perform_8b_10b_link_training(link, <_settings); -#if defined(CONFIG_DRM_AMD_DC_DCN) + if (link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN && encoding == DP_8b_10b_ENCODING) + status = dp_perform_fixed_vs_pe_training_sequence(link, link_res, <_settings); + else if (encoding == DP_8b_10b_ENCODING) + status = dp_perform_8b_10b_link_training(link, link_res, <_settings); else if (encoding == DP_128b_132b_ENCODING) - status = dp_perform_128b_132b_link_training(link, <_settings); -#endif + status = dp_perform_128b_132b_link_training(link, link_res, <_settings); else ASSERT(0); - /* exit training mode and switch to video idle */ + /* exit training mode */ dpcd_exit_training_mode(link); + + /* switch to video idle */ if ((status == LINK_TRAINING_SUCCESS) || !skip_video_pattern) status = dp_transition_to_video_idle(link, + link_res, <_settings, status); @@ -2250,37 +2699,38 @@ bool perform_link_training_with_retries( struct dc_stream_state *stream = pipe_ctx->stream; struct dc_link *link = stream->link; enum dp_panel_mode panel_mode = dp_get_panel_mode(link); - struct link_encoder *link_enc; enum link_training_result status = LINK_TRAINING_CR_FAIL_LANE0; - struct dc_link_settings current_setting = *link_setting; - - /* Dynamically assigned link encoders associated with stream rather than - * link. - */ - if (link->is_dig_mapping_flexible && link->dc->res_pool->funcs->link_encs_assign) - link_enc = link_enc_cfg_get_link_enc_used_by_stream(link->ctx->dc, pipe_ctx->stream); - else - link_enc = link->link_enc; - - /* We need to do this before the link training to ensure the idle pattern in SST - * mode will be sent right after the link training - */ - if (dp_get_link_encoding_format(¤t_setting) == DP_8b_10b_ENCODING) { - link_enc->funcs->connect_dig_be_to_fe(link_enc, - pipe_ctx->stream_res.stream_enc->id, true); - dp_source_sequence_trace(link, DPCD_SOURCE_SEQ_AFTER_CONNECT_DIG_FE_BE); - } + struct dc_link_settings cur_link_settings = *link_setting; + struct dc_link_settings max_link_settings = *link_setting; + const struct link_hwss *link_hwss = get_link_hwss(link, &pipe_ctx->link_res); + int fail_count = 0; + bool is_link_bw_low = false; /* link bandwidth < stream bandwidth */ + bool is_link_bw_min = /* RBR x 1 */ + (cur_link_settings.link_rate <= LINK_RATE_LOW) && + (cur_link_settings.lane_count <= LANE_COUNT_ONE); + + dp_trace_commit_lt_init(link); + + if (dp_get_link_encoding_format(&cur_link_settings) == DP_8b_10b_ENCODING) + /* We need to do this before the link training to ensure the idle + * pattern in SST mode will be sent right after the link training + */ + link_hwss->setup_stream_encoder(pipe_ctx); - for (j = 0; j < attempts; ++j) { + dp_trace_set_lt_start_timestamp(link, false); + j = 0; + while (j < attempts && fail_count < (attempts * 10)) { - DC_LOG_HW_LINK_TRAINING("%s: Beginning link training attempt %u of %d\n", - __func__, (unsigned int)j + 1, attempts); + DC_LOG_HW_LINK_TRAINING("%s: Beginning link(%d) training attempt %u of %d @ rate(%d) x lane(%d)\n", + __func__, link->link_index, (unsigned int)j + 1, attempts, cur_link_settings.link_rate, + cur_link_settings.lane_count); dp_enable_link_phy( link, + &pipe_ctx->link_res, signal, pipe_ctx->clock_source->id, - ¤t_setting); + &cur_link_settings); if (stream->sink_patches.dppowerup_delay > 0) { int delay_dp_power_up_in_ms = stream->sink_patches.dppowerup_delay; @@ -2305,65 +2755,104 @@ bool perform_link_training_with_retries( dp_set_panel_mode(link, panel_mode); if (link->aux_access_disabled) { - dc_link_dp_perform_link_training_skip_aux(link, ¤t_setting); + dc_link_dp_perform_link_training_skip_aux(link, &pipe_ctx->link_res, &cur_link_settings); return true; } else { /** @todo Consolidate USB4 DP and DPx.x training. */ if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) { status = dc_link_dpia_perform_link_training(link, - ¤t_setting, - skip_video_pattern); + &pipe_ctx->link_res, + &cur_link_settings, + skip_video_pattern); /* Transmit idle pattern once training successful. */ - if (status == LINK_TRAINING_SUCCESS) - dp_set_hw_test_pattern(link, DP_TEST_PATTERN_VIDEO_MODE, - NULL, 0); + if (status == LINK_TRAINING_SUCCESS && !is_link_bw_low) { + dp_set_hw_test_pattern(link, &pipe_ctx->link_res, DP_TEST_PATTERN_VIDEO_MODE, NULL, 0); + /* Update verified link settings to current one + * Because DPIA LT might fallback to lower link setting. + */ + link->verified_link_cap.link_rate = link->cur_link_settings.link_rate; + link->verified_link_cap.lane_count = link->cur_link_settings.lane_count; + } } else { status = dc_link_dp_perform_link_training(link, - ¤t_setting, - skip_video_pattern); + &pipe_ctx->link_res, + &cur_link_settings, + skip_video_pattern); } - if (status == LINK_TRAINING_SUCCESS) + dp_trace_lt_total_count_increment(link, false); + dp_trace_lt_result_update(link, status, false); + dp_trace_set_lt_end_timestamp(link, false); + if (status == LINK_TRAINING_SUCCESS && !is_link_bw_low) return true; } - /* latest link training still fail, skip delay and keep PHY on - */ - if (j == (attempts - 1) && link->ep_type == DISPLAY_ENDPOINT_PHY) - break; + fail_count++; + dp_trace_lt_fail_count_update(link, fail_count, false); + if (link->ep_type == DISPLAY_ENDPOINT_PHY) { + /* latest link training still fail or link training is aborted + * skip delay and keep PHY on + */ + if (j == (attempts - 1) || (status == LINK_TRAINING_ABORT)) + break; + } - DC_LOG_WARNING("%s: Link training attempt %u of %d failed\n", - __func__, (unsigned int)j + 1, attempts); + DC_LOG_WARNING("%s: Link(%d) training attempt %u of %d failed @ rate(%d) x lane(%d) : fail reason:(%d)\n", + __func__, link->link_index, (unsigned int)j + 1, attempts, cur_link_settings.link_rate, + cur_link_settings.lane_count, status); - dp_disable_link_phy(link, signal); + dp_disable_link_phy(link, &pipe_ctx->link_res, signal); /* Abort link training if failure due to sink being unplugged. */ if (status == LINK_TRAINING_ABORT) { enum dc_connection_type type = dc_connection_none; dc_link_detect_sink(link, &type); - if (type == dc_connection_none) + if (type == dc_connection_none) { + DC_LOG_HW_LINK_TRAINING("%s: Aborting training because sink unplugged\n", __func__); break; - } else if (do_fallback) { + } + } + + /* Try to train again at original settings if: + * - not falling back between training attempts; + * - aborted previous attempt due to reasons other than sink unplug; + * - successfully trained but at a link rate lower than that required by stream; + * - reached minimum link bandwidth. + */ + if (!do_fallback || (status == LINK_TRAINING_ABORT) || + (status == LINK_TRAINING_SUCCESS && is_link_bw_low) || + is_link_bw_min) { + j++; + cur_link_settings = *link_setting; + delay_between_attempts += LINK_TRAINING_RETRY_DELAY; + is_link_bw_low = false; + is_link_bw_min = (cur_link_settings.link_rate <= LINK_RATE_LOW) && + (cur_link_settings.lane_count <= LANE_COUNT_ONE); + + } else if (do_fallback) { /* Try training at lower link bandwidth if doing fallback. */ uint32_t req_bw; uint32_t link_bw; - decide_fallback_link_setting(*link_setting, ¤t_setting, status); + decide_fallback_link_setting(link, &max_link_settings, + &cur_link_settings, status); /* Fail link training if reduced link bandwidth no longer meets * stream requirements. */ req_bw = dc_bandwidth_in_kbps_from_timing(&stream->timing); - link_bw = dc_link_bandwidth_kbps(link, ¤t_setting); - if (req_bw > link_bw) - break; + link_bw = dc_link_bandwidth_kbps(link, &cur_link_settings); + is_link_bw_low = (req_bw > link_bw); + is_link_bw_min = ((cur_link_settings.link_rate <= LINK_RATE_LOW) && + (cur_link_settings.lane_count <= LANE_COUNT_ONE)); + if (is_link_bw_low) + DC_LOG_WARNING( + "%s: Link(%d) bandwidth too low after fallback req_bw(%d) > link_bw(%d)\n", + __func__, link->link_index, req_bw, link_bw); } msleep(delay_between_attempts); - - delay_between_attempts += LINK_TRAINING_RETRY_DELAY; } - return false; } @@ -2385,12 +2874,13 @@ static enum clock_source_id get_clock_source_id(struct dc_link *link) return dp_cs_id; } -static void set_dp_mst_mode(struct dc_link *link, bool mst_enable) +static void set_dp_mst_mode(struct dc_link *link, const struct link_resource *link_res, + bool mst_enable) { if (mst_enable == false && link->type == dc_connection_mst_branch) { /* Disable MST on link. Use only local sink. */ - dp_disable_link_phy_mst(link, link->connector_signal); + dp_disable_link_phy_mst(link, link_res, link->connector_signal); link->type = dc_connection_single; link->local_sink = link->remote_sinks[0]; @@ -2401,7 +2891,7 @@ static void set_dp_mst_mode(struct dc_link *link, bool mst_enable) link->type == dc_connection_single && link->remote_sinks[0] != NULL) { /* Re-enable MST on link. */ - dp_disable_link_phy(link, link->connector_signal); + dp_disable_link_phy(link, link_res, link->connector_signal); dp_enable_mst_on_sink(link, true); link->type = dc_connection_mst_branch; @@ -2427,6 +2917,7 @@ bool dc_link_dp_sync_lt_begin(struct dc_link *link) enum link_training_result dc_link_dp_sync_lt_attempt( struct dc_link *link, + const struct link_resource *link_res, struct dc_link_settings *link_settings, struct dc_link_training_overrides *lt_overrides) { @@ -2446,25 +2937,21 @@ enum link_training_result dc_link_dp_sync_lt_attempt( <_settings); /* Setup MST Mode */ if (lt_overrides->mst_enable) - set_dp_mst_mode(link, *lt_overrides->mst_enable); + set_dp_mst_mode(link, link_res, *lt_overrides->mst_enable); /* Disable link */ - dp_disable_link_phy(link, link->connector_signal); + dp_disable_link_phy(link, link_res, link->connector_signal); /* Enable link */ dp_cs_id = get_clock_source_id(link); - dp_enable_link_phy(link, link->connector_signal, + dp_enable_link_phy(link, link_res, link->connector_signal, dp_cs_id, link_settings); /* Set FEC enable */ -#if defined(CONFIG_DRM_AMD_DC_DCN) if (dp_get_link_encoding_format(link_settings) == DP_8b_10b_ENCODING) { -#endif fec_enable = lt_overrides->fec_enable && *lt_overrides->fec_enable; - dp_set_fec_ready(link, fec_enable); -#if defined(CONFIG_DRM_AMD_DC_DCN) + dp_set_fec_ready(link, NULL, fec_enable); } -#endif if (lt_overrides->alternate_scrambler_reset) { if (*lt_overrides->alternate_scrambler_reset) @@ -2478,7 +2965,7 @@ enum link_training_result dc_link_dp_sync_lt_attempt( /* Attempt to train with given link training settings */ if (link->ctx->dc->work_arounds.lt_early_cr_pattern) - start_clock_recovery_pattern_early(link, <_settings, DPRX); + start_clock_recovery_pattern_early(link, link_res, <_settings, DPRX); /* Set link rate, lane count and spread. */ dpcd_set_link_settings(link, <_settings); @@ -2486,9 +2973,10 @@ enum link_training_result dc_link_dp_sync_lt_attempt( /* 2. perform link training (set link training done * to false is done as well) */ - lt_status = perform_clock_recovery_sequence(link, <_settings, DPRX); + lt_status = perform_clock_recovery_sequence(link, link_res, <_settings, DPRX); if (lt_status == LINK_TRAINING_SUCCESS) { lt_status = perform_channel_equalization_sequence(link, + link_res, <_settings, DPRX); } @@ -2506,21 +2994,16 @@ bool dc_link_dp_sync_lt_end(struct dc_link *link, bool link_down) * Still shouldn't turn off dp_receiver (DPCD:600h) */ if (link_down == true) { -#if defined(CONFIG_DRM_AMD_DC_DCN) struct dc_link_settings link_settings = link->cur_link_settings; -#endif - dp_disable_link_phy(link, link->connector_signal); -#if defined(CONFIG_DRM_AMD_DC_DCN) + dp_disable_link_phy(link, NULL, link->connector_signal); if (dp_get_link_encoding_format(&link_settings) == DP_8b_10b_ENCODING) -#endif - dp_set_fec_ready(link, false); + dp_set_fec_ready(link, NULL, false); } link->sync_lt_in_progress = false; return true; } -#if defined(CONFIG_DRM_AMD_DC_DCN) static enum dc_link_rate get_lttpr_max_link_rate(struct dc_link *link) { enum dc_link_rate lttpr_max_link_rate = link->dpcd_caps.lttpr_caps.max_link_rate; @@ -2534,7 +3017,20 @@ static enum dc_link_rate get_lttpr_max_link_rate(struct dc_link *link) return lttpr_max_link_rate; } -#endif + +static enum dc_link_rate get_cable_max_link_rate(struct dc_link *link) +{ + enum dc_link_rate cable_max_link_rate = LINK_RATE_HIGH3; + + if (link->dpcd_caps.cable_id.bits.UHBR10_20_CAPABILITY & DP_UHBR20) + cable_max_link_rate = LINK_RATE_UHBR20; + else if (link->dpcd_caps.cable_id.bits.UHBR13_5_CAPABILITY) + cable_max_link_rate = LINK_RATE_UHBR13_5; + else if (link->dpcd_caps.cable_id.bits.UHBR10_20_CAPABILITY & DP_UHBR10) + cable_max_link_rate = LINK_RATE_UHBR10; + + return cable_max_link_rate; +} bool dc_link_dp_get_max_link_enc_cap(const struct dc_link *link, struct dc_link_settings *max_link_enc_cap) { @@ -2545,16 +3041,7 @@ bool dc_link_dp_get_max_link_enc_cap(const struct dc_link *link, struct dc_link_ return false; } - /* Links supporting dynamically assigned link encoder will be assigned next - * available encoder if one not already assigned. - */ - if (link->is_dig_mapping_flexible && - link->dc->res_pool->funcs->link_encs_assign) { - link_enc = link_enc_cfg_get_link_enc_used_by_link(link->ctx->dc, link); - if (link_enc == NULL) - link_enc = link_enc_cfg_get_next_avail_link_enc(link->ctx->dc); - } else - link_enc = link->link_enc; + link_enc = link_enc_cfg_get_link_enc(link); ASSERT(link_enc); if (link_enc && link_enc->funcs->get_max_link_cap) { @@ -2568,34 +3055,21 @@ bool dc_link_dp_get_max_link_enc_cap(const struct dc_link *link, struct dc_link_ return false; } -static struct dc_link_settings get_max_link_cap(struct dc_link *link) + +struct dc_link_settings dp_get_max_link_cap(struct dc_link *link) { struct dc_link_settings max_link_cap = {0}; -#if defined(CONFIG_DRM_AMD_DC_DCN) enum dc_link_rate lttpr_max_link_rate; -#endif + enum dc_link_rate cable_max_link_rate; struct link_encoder *link_enc = NULL; - /* Links supporting dynamically assigned link encoder will be assigned next - * available encoder if one not already assigned. - */ - if (link->is_dig_mapping_flexible && - link->dc->res_pool->funcs->link_encs_assign) { - link_enc = link_enc_cfg_get_link_enc_used_by_link(link->ctx->dc, link); - if (link_enc == NULL) - link_enc = link_enc_cfg_get_next_avail_link_enc(link->ctx->dc); - } else - link_enc = link->link_enc; + + link_enc = link_enc_cfg_get_link_enc(link); ASSERT(link_enc); /* get max link encoder capability */ if (link_enc) link_enc->funcs->get_max_link_cap(link_enc, &max_link_cap); -#if defined(CONFIG_DRM_AMD_DC_DCN) - if (max_link_cap.link_rate >= LINK_RATE_UHBR10 && - !link->hpo_dp_link_enc) - max_link_cap.link_rate = LINK_RATE_HIGH3; -#endif /* Lower link settings based on sink's link cap */ if (link->reported_link_cap.lane_count < max_link_cap.lane_count) @@ -2608,29 +3082,36 @@ static struct dc_link_settings get_max_link_cap(struct dc_link *link) max_link_cap.link_spread) max_link_cap.link_spread = link->reported_link_cap.link_spread; + + /* Lower link settings based on cable attributes */ + cable_max_link_rate = get_cable_max_link_rate(link); + + if (!link->dc->debug.ignore_cable_id && + cable_max_link_rate < max_link_cap.link_rate) + max_link_cap.link_rate = cable_max_link_rate; + /* * account for lttpr repeaters cap * notes: repeaters do not snoop in the DPRX Capabilities addresses (3.6.3). */ - if (link->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) { + if (dp_is_lttpr_present(link)) { if (link->dpcd_caps.lttpr_caps.max_lane_count < max_link_cap.lane_count) max_link_cap.lane_count = link->dpcd_caps.lttpr_caps.max_lane_count; - -#if defined(CONFIG_DRM_AMD_DC_DCN) lttpr_max_link_rate = get_lttpr_max_link_rate(link); if (lttpr_max_link_rate < max_link_cap.link_rate) max_link_cap.link_rate = lttpr_max_link_rate; -#else - if (link->dpcd_caps.lttpr_caps.max_link_rate < max_link_cap.link_rate) - max_link_cap.link_rate = link->dpcd_caps.lttpr_caps.max_link_rate; -#endif DC_LOG_HW_LINK_TRAINING("%s\n Training with LTTPR, max_lane count %d max_link rate %d \n", __func__, max_link_cap.lane_count, max_link_cap.link_rate); } + + if (dp_get_link_encoding_format(&max_link_cap) == DP_128b_132b_ENCODING && + link->dc->debug.disable_uhbr) + max_link_cap.link_rate = LINK_RATE_HIGH3; + return max_link_cap; } @@ -2749,140 +3230,84 @@ bool hpd_rx_irq_check_link_loss_status( return return_code; } -bool dp_verify_link_cap( +static bool dp_verify_link_cap( struct dc_link *link, struct dc_link_settings *known_limit_link_setting, int *fail_count) { - struct dc_link_settings max_link_cap = {0}; - struct dc_link_settings cur_link_setting = {0}; - struct dc_link_settings *cur = &cur_link_setting; - struct dc_link_settings initial_link_settings = {0}; - bool success; - bool skip_link_training; + struct dc_link_settings cur_link_settings = {0}; + struct dc_link_settings max_link_settings = *known_limit_link_setting; + bool success = false; bool skip_video_pattern; - enum clock_source_id dp_cs_id = CLOCK_SOURCE_ID_EXTERNAL; - enum link_training_result status; + enum clock_source_id dp_cs_id = get_clock_source_id(link); + enum link_training_result status = LINK_TRAINING_SUCCESS; union hpd_irq_data irq_data; - - /* link training starts with the maximum common settings - * supported by both sink and ASIC. - */ - max_link_cap = get_max_link_cap(link); - initial_link_settings = get_common_supported_link_settings( - *known_limit_link_setting, - max_link_cap); - - /* Accept reported capabilities if link supports flexible encoder mapping or encoder already in use. */ - if (link->dc->debug.skip_detection_link_training || - link->is_dig_mapping_flexible) { - /* TODO - should we check link encoder's max link caps here? - * How do we know which link encoder to check from? - */ - link->verified_link_cap = *known_limit_link_setting; - return true; - } else if (link->link_enc && link->dc->res_pool->funcs->link_encs_assign && - !link_enc_cfg_is_link_enc_avail(link->ctx->dc, link->link_enc->preferred_engine, link)) { - link->verified_link_cap = initial_link_settings; - return true; - } + struct link_resource link_res; memset(&irq_data, 0, sizeof(irq_data)); - success = false; - skip_link_training = false; + cur_link_settings = max_link_settings; /* Grant extended timeout request */ - if ((link->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) && (link->dpcd_caps.lttpr_caps.max_ext_timeout > 0)) { + if (dp_is_lttpr_present(link) && link->dpcd_caps.lttpr_caps.max_ext_timeout > 0) { uint8_t grant = link->dpcd_caps.lttpr_caps.max_ext_timeout & 0x80; core_link_write_dpcd(link, DP_PHY_REPEATER_EXTENDED_WAIT_TIMEOUT, &grant, sizeof(grant)); } -#if defined(CONFIG_DRM_AMD_DC_DCN) - if (dp_get_link_encoding_format(&link->cur_link_settings) == DP_128b_132b_ENCODING) - reset_dp_hpo_stream_encoders_for_link(link); -#endif - /* TODO implement override and monitor patch later */ - - /* try to train the link from high to low to - * find the physical link capability - */ - /* disable PHY done possible by BIOS, will be done by driver itself */ - dp_disable_link_phy(link, link->connector_signal); - - dp_cs_id = get_clock_source_id(link); - - cur_link_setting = initial_link_settings; - - /* Temporary Renoir-specific workaround for SWDEV-215184; - * PHY will sometimes be in bad state on hotplugging display from certain USB-C dongle, - * so add extra cycle of enabling and disabling the PHY before first link training. - */ - if (link->link_enc && link->link_enc->features.flags.bits.DP_IS_USB_C && - link->dc->debug.usbc_combo_phy_reset_wa) { - dp_enable_link_phy(link, link->connector_signal, dp_cs_id, cur); - dp_disable_link_phy(link, link->connector_signal); - } - do { - skip_video_pattern = true; - - if (cur->link_rate == LINK_RATE_LOW) - skip_video_pattern = false; + if (!get_temp_dp_link_res(link, &link_res, &cur_link_settings)) + continue; + skip_video_pattern = cur_link_settings.link_rate != LINK_RATE_LOW; dp_enable_link_phy( link, + &link_res, link->connector_signal, dp_cs_id, - cur); + &cur_link_settings); + status = dc_link_dp_perform_link_training( + link, + &link_res, + &cur_link_settings, + skip_video_pattern); - if (skip_link_training) + if (status == LINK_TRAINING_SUCCESS) { success = true; - else { - status = dc_link_dp_perform_link_training( + udelay(1000); + if (read_hpd_rx_irq_data(link, &irq_data) == DC_OK && + hpd_rx_irq_check_link_loss_status( link, - cur, - skip_video_pattern); - if (status == LINK_TRAINING_SUCCESS) - success = true; - else + &irq_data)) (*fail_count)++; - } - if (success) { - link->verified_link_cap = *cur; - udelay(1000); - if (read_hpd_rx_irq_data(link, &irq_data) == DC_OK) - if (hpd_rx_irq_check_link_loss_status( - link, - &irq_data)) - (*fail_count)++; + } else { + (*fail_count)++; } - /* always disable the link before trying another - * setting or before returning we'll enable it later - * based on the actual mode we're driving - */ - dp_disable_link_phy(link, link->connector_signal); - } while (!success && decide_fallback_link_setting( - initial_link_settings, cur, status)); + dp_trace_lt_total_count_increment(link, true); + dp_trace_lt_result_update(link, status, true); + dp_disable_link_phy(link, &link_res, link->connector_signal); + } while (!success && decide_fallback_link_setting(link, + &max_link_settings, &cur_link_settings, status)); + + link->verified_link_cap = success ? + cur_link_settings : fail_safe_link_settings; + return success; +} - /* Link Training failed for all Link Settings - * (Lane Count is still unknown) +static void apply_usbc_combo_phy_reset_wa(struct dc_link *link, + struct dc_link_settings *link_settings) +{ + /* Temporary Renoir-specific workaround PHY will sometimes be in bad + * state on hotplugging display from certain USB-C dongle, so add extra + * cycle of enabling and disabling the PHY before first link training. */ - if (!success) { - /* If all LT fails for all settings, - * set verified = failed safe (1 lane low) - */ - link->verified_link_cap.lane_count = LANE_COUNT_ONE; - link->verified_link_cap.link_rate = LINK_RATE_LOW; - - link->verified_link_cap.link_spread = - LINK_SPREAD_DISABLED; - } - + struct link_resource link_res = {0}; + enum clock_source_id dp_cs_id = get_clock_source_id(link); - return success; + dp_enable_link_phy(link, &link_res, link->connector_signal, + dp_cs_id, link_settings); + dp_disable_link_phy(link, &link_res, link->connector_signal); } bool dp_verify_link_cap_with_retries( @@ -2892,101 +3317,63 @@ bool dp_verify_link_cap_with_retries( { int i = 0; bool success = false; + int fail_count = 0; + + dp_trace_detect_lt_init(link); + + if (link->link_enc && link->link_enc->features.flags.bits.DP_IS_USB_C && + link->dc->debug.usbc_combo_phy_reset_wa) + apply_usbc_combo_phy_reset_wa(link, known_limit_link_setting); + dp_trace_set_lt_start_timestamp(link, false); for (i = 0; i < attempts; i++) { - int fail_count = 0; enum dc_connection_type type = dc_connection_none; memset(&link->verified_link_cap, 0, sizeof(struct dc_link_settings)); if (!dc_link_detect_sink(link, &type) || type == dc_connection_none) { - link->verified_link_cap.lane_count = LANE_COUNT_ONE; - link->verified_link_cap.link_rate = LINK_RATE_LOW; - link->verified_link_cap.link_spread = LINK_SPREAD_DISABLED; + link->verified_link_cap = fail_safe_link_settings; break; - } else if (dp_verify_link_cap(link, - known_limit_link_setting, + } else if (dp_verify_link_cap(link, known_limit_link_setting, &fail_count) && fail_count == 0) { success = true; break; } msleep(10); } - return success; -} -bool dp_verify_mst_link_cap( - struct dc_link *link) -{ - struct dc_link_settings max_link_cap = {0}; + dp_trace_lt_fail_count_update(link, fail_count, true); + dp_trace_set_lt_end_timestamp(link, true); - if (dp_get_link_encoding_format(&link->reported_link_cap) == - DP_8b_10b_ENCODING) { - max_link_cap = get_max_link_cap(link); - link->verified_link_cap = get_common_supported_link_settings( - link->reported_link_cap, - max_link_cap); - } -#if defined(CONFIG_DRM_AMD_DC_DCN) - else if (dp_get_link_encoding_format(&link->reported_link_cap) == - DP_128b_132b_ENCODING) { - dp_verify_link_cap_with_retries(link, - &link->reported_link_cap, - LINK_TRAINING_MAX_VERIFY_RETRY); - } -#endif - return true; + return success; } -static struct dc_link_settings get_common_supported_link_settings( - struct dc_link_settings link_setting_a, - struct dc_link_settings link_setting_b) +/* in DP compliance test, DPR-120 may have + * a random value in its MAX_LINK_BW dpcd field. + * We map it to the maximum supported link rate that + * is smaller than MAX_LINK_BW in this case. + */ +static enum dc_link_rate get_link_rate_from_max_link_bw( + uint8_t max_link_bw) { - struct dc_link_settings link_settings = {0}; + enum dc_link_rate link_rate; - link_settings.lane_count = - (link_setting_a.lane_count <= - link_setting_b.lane_count) ? - link_setting_a.lane_count : - link_setting_b.lane_count; - link_settings.link_rate = - (link_setting_a.link_rate <= - link_setting_b.link_rate) ? - link_setting_a.link_rate : - link_setting_b.link_rate; - link_settings.link_spread = LINK_SPREAD_DISABLED; - - /* in DP compliance test, DPR-120 may have - * a random value in its MAX_LINK_BW dpcd field. - * We map it to the maximum supported link rate that - * is smaller than MAX_LINK_BW in this case. - */ -#if defined(CONFIG_DRM_AMD_DC_DCN) - if (link_settings.link_rate > LINK_RATE_UHBR20) { - link_settings.link_rate = LINK_RATE_UHBR20; - } else if (link_settings.link_rate < LINK_RATE_UHBR20 && - link_settings.link_rate > LINK_RATE_UHBR13_5) { - link_settings.link_rate = LINK_RATE_UHBR13_5; - } else if (link_settings.link_rate < LINK_RATE_UHBR10 && - link_settings.link_rate > LINK_RATE_HIGH3) { -#else - if (link_settings.link_rate > LINK_RATE_HIGH3) { -#endif - link_settings.link_rate = LINK_RATE_HIGH3; - } else if (link_settings.link_rate < LINK_RATE_HIGH3 - && link_settings.link_rate > LINK_RATE_HIGH2) { - link_settings.link_rate = LINK_RATE_HIGH2; - } else if (link_settings.link_rate < LINK_RATE_HIGH2 - && link_settings.link_rate > LINK_RATE_HIGH) { - link_settings.link_rate = LINK_RATE_HIGH; - } else if (link_settings.link_rate < LINK_RATE_HIGH - && link_settings.link_rate > LINK_RATE_LOW) { - link_settings.link_rate = LINK_RATE_LOW; - } else if (link_settings.link_rate < LINK_RATE_LOW) { - link_settings.link_rate = LINK_RATE_UNKNOWN; + if (max_link_bw >= LINK_RATE_HIGH3) { + link_rate = LINK_RATE_HIGH3; + } else if (max_link_bw < LINK_RATE_HIGH3 + && max_link_bw >= LINK_RATE_HIGH2) { + link_rate = LINK_RATE_HIGH2; + } else if (max_link_bw < LINK_RATE_HIGH2 + && max_link_bw >= LINK_RATE_HIGH) { + link_rate = LINK_RATE_HIGH; + } else if (max_link_bw < LINK_RATE_HIGH + && max_link_bw >= LINK_RATE_LOW) { + link_rate = LINK_RATE_LOW; + } else { + link_rate = LINK_RATE_UNKNOWN; } - return link_settings; + return link_rate; } static inline bool reached_minimum_lane_count(enum dc_lane_count lane_count) @@ -3016,14 +3403,12 @@ static enum dc_lane_count reduce_lane_count(enum dc_lane_count lane_count) static enum dc_link_rate reduce_link_rate(enum dc_link_rate link_rate) { switch (link_rate) { -#if defined(CONFIG_DRM_AMD_DC_DCN) case LINK_RATE_UHBR20: return LINK_RATE_UHBR13_5; case LINK_RATE_UHBR13_5: return LINK_RATE_UHBR10; case LINK_RATE_UHBR10: return LINK_RATE_HIGH3; -#endif case LINK_RATE_HIGH3: return LINK_RATE_HIGH2; case LINK_RATE_HIGH2: @@ -3049,7 +3434,8 @@ static enum dc_lane_count increase_lane_count(enum dc_lane_count lane_count) } } -static enum dc_link_rate increase_link_rate(enum dc_link_rate link_rate) +static enum dc_link_rate increase_link_rate(struct dc_link *link, + enum dc_link_rate link_rate) { switch (link_rate) { case LINK_RATE_LOW: @@ -3058,27 +3444,37 @@ static enum dc_link_rate increase_link_rate(enum dc_link_rate link_rate) return LINK_RATE_HIGH2; case LINK_RATE_HIGH2: return LINK_RATE_HIGH3; -#if defined(CONFIG_DRM_AMD_DC_DCN) case LINK_RATE_HIGH3: return LINK_RATE_UHBR10; case LINK_RATE_UHBR10: - return LINK_RATE_UHBR13_5; + /* upto DP2.x specs UHBR13.5 is the only link rate that could be + * not supported by DPRX when higher link rate is supported. + * so we treat it as a special case for code simplicity. When we + * have new specs with more link rates like this, we should + * consider a more generic solution to handle discrete link + * rate capabilities. + */ + return link->dpcd_caps.dp_128b_132b_supported_link_rates.bits.UHBR13_5 ? + LINK_RATE_UHBR13_5 : LINK_RATE_UHBR20; case LINK_RATE_UHBR13_5: return LINK_RATE_UHBR20; -#endif default: return LINK_RATE_UNKNOWN; } } -#if defined(CONFIG_DRM_AMD_DC_DCN) static bool decide_fallback_link_setting_max_bw_policy( + struct dc_link *link, const struct dc_link_settings *max, - struct dc_link_settings *cur) + struct dc_link_settings *cur, + enum link_training_result training_result) { uint8_t cur_idx = 0, next_idx; bool found = false; + if (training_result == LINK_TRAINING_ABORT) + return false; + while (cur_idx < ARRAY_SIZE(dp_lt_fallbacks)) /* find current index */ if (dp_lt_fallbacks[cur_idx].lane_count == cur->lane_count && @@ -3091,11 +3487,22 @@ static bool decide_fallback_link_setting_max_bw_policy( while (next_idx < ARRAY_SIZE(dp_lt_fallbacks)) /* find next index */ - if (dp_lt_fallbacks[next_idx].lane_count <= max->lane_count && - dp_lt_fallbacks[next_idx].link_rate <= max->link_rate) - break; - else + if (dp_lt_fallbacks[next_idx].lane_count > max->lane_count || + dp_lt_fallbacks[next_idx].link_rate > max->link_rate) + next_idx++; + else if (dp_lt_fallbacks[next_idx].link_rate == LINK_RATE_UHBR13_5 && + link->dpcd_caps.dp_128b_132b_supported_link_rates.bits.UHBR13_5 == 0) + /* upto DP2.x specs UHBR13.5 is the only link rate that + * could be not supported by DPRX when higher link rate + * is supported. so we treat it as a special case for + * code simplicity. When we have new specs with more + * link rates like this, we should consider a more + * generic solution to handle discrete link rate + * capabilities. + */ next_idx++; + else + break; if (next_idx < ARRAY_SIZE(dp_lt_fallbacks)) { cur->lane_count = dp_lt_fallbacks[next_idx].lane_count; @@ -3105,7 +3512,6 @@ static bool decide_fallback_link_setting_max_bw_policy( return found; } -#endif /* * function: set link rate and lane count fallback based @@ -3116,17 +3522,15 @@ static bool decide_fallback_link_setting_max_bw_policy( * and no further fallback could be done */ static bool decide_fallback_link_setting( - struct dc_link_settings initial_link_settings, - struct dc_link_settings *current_link_setting, + struct dc_link *link, + struct dc_link_settings *max, + struct dc_link_settings *cur, enum link_training_result training_result) { - if (!current_link_setting) - return false; -#if defined(CONFIG_DRM_AMD_DC_DCN) - if (dp_get_link_encoding_format(&initial_link_settings) == DP_128b_132b_ENCODING) - return decide_fallback_link_setting_max_bw_policy(&initial_link_settings, - current_link_setting); -#endif + if (dp_get_link_encoding_format(max) == DP_128b_132b_ENCODING || + link->dc->debug.force_dp2_lt_fallback_method) + return decide_fallback_link_setting_max_bw_policy(link, max, cur, + training_result); switch (training_result) { case LINK_TRAINING_CR_FAIL_LANE0: @@ -3134,45 +3538,37 @@ static bool decide_fallback_link_setting( case LINK_TRAINING_CR_FAIL_LANE23: case LINK_TRAINING_LQA_FAIL: { - if (!reached_minimum_link_rate - (current_link_setting->link_rate)) { - current_link_setting->link_rate = - reduce_link_rate( - current_link_setting->link_rate); - } else if (!reached_minimum_lane_count - (current_link_setting->lane_count)) { - current_link_setting->link_rate = - initial_link_settings.link_rate; + if (!reached_minimum_link_rate(cur->link_rate)) { + cur->link_rate = reduce_link_rate(cur->link_rate); + } else if (!reached_minimum_lane_count(cur->lane_count)) { + cur->link_rate = max->link_rate; if (training_result == LINK_TRAINING_CR_FAIL_LANE0) return false; else if (training_result == LINK_TRAINING_CR_FAIL_LANE1) - current_link_setting->lane_count = - LANE_COUNT_ONE; - else if (training_result == - LINK_TRAINING_CR_FAIL_LANE23) - current_link_setting->lane_count = - LANE_COUNT_TWO; + cur->lane_count = LANE_COUNT_ONE; + else if (training_result == LINK_TRAINING_CR_FAIL_LANE23) + cur->lane_count = LANE_COUNT_TWO; else - current_link_setting->lane_count = - reduce_lane_count( - current_link_setting->lane_count); + cur->lane_count = reduce_lane_count(cur->lane_count); } else { return false; } break; } case LINK_TRAINING_EQ_FAIL_EQ: + case LINK_TRAINING_EQ_FAIL_CR_PARTIAL: { - if (!reached_minimum_lane_count - (current_link_setting->lane_count)) { - current_link_setting->lane_count = - reduce_lane_count( - current_link_setting->lane_count); - } else if (!reached_minimum_link_rate - (current_link_setting->link_rate)) { - current_link_setting->link_rate = - reduce_link_rate( - current_link_setting->link_rate); + if (!reached_minimum_lane_count(cur->lane_count)) { + cur->lane_count = reduce_lane_count(cur->lane_count); + } else if (!reached_minimum_link_rate(cur->link_rate)) { + cur->link_rate = reduce_link_rate(cur->link_rate); + /* Reduce max link rate to avoid potential infinite loop. + * Needed so that any subsequent CR_FAIL fallback can't + * re-set the link rate higher than the link rate from + * the latest EQ_FAIL fallback. + */ + max->link_rate = cur->link_rate; + cur->lane_count = max->lane_count; } else { return false; } @@ -3180,11 +3576,15 @@ static bool decide_fallback_link_setting( } case LINK_TRAINING_EQ_FAIL_CR: { - if (!reached_minimum_link_rate - (current_link_setting->link_rate)) { - current_link_setting->link_rate = - reduce_link_rate( - current_link_setting->link_rate); + if (!reached_minimum_link_rate(cur->link_rate)) { + cur->link_rate = reduce_link_rate(cur->link_rate); + /* Reduce max link rate to avoid potential infinite loop. + * Needed so that any subsequent CR_FAIL fallback can't + * re-set the link rate higher than the link rate from + * the latest EQ_FAIL fallback. + */ + max->link_rate = cur->link_rate; + cur->lane_count = max->lane_count; } else { return false; } @@ -3279,7 +3679,7 @@ static bool decide_dp_link_settings(struct dc_link *link, struct dc_link_setting current_link_setting.lane_count); } else { current_link_setting.link_rate = - increase_link_rate( + increase_link_rate(link, current_link_setting.link_rate); current_link_setting.lane_count = initial_link_setting.lane_count; @@ -3346,21 +3746,161 @@ bool decide_edp_link_settings(struct dc_link *link, struct dc_link_settings *lin return false; } +static bool decide_edp_link_settings_with_dsc(struct dc_link *link, + struct dc_link_settings *link_setting, + uint32_t req_bw, + enum dc_link_rate max_link_rate) +{ + struct dc_link_settings initial_link_setting; + struct dc_link_settings current_link_setting; + uint32_t link_bw; + + unsigned int policy = 0; + + policy = link->panel_config.dsc.force_dsc_edp_policy; + if (max_link_rate == LINK_RATE_UNKNOWN) + max_link_rate = link->verified_link_cap.link_rate; + /* + * edp_supported_link_rates_count is only valid for eDP v1.4 or higher. + * Per VESA eDP spec, "The DPCD revision for eDP v1.4 is 13h" + */ + if ((link->dpcd_caps.dpcd_rev.raw < DPCD_REV_13 || + link->dpcd_caps.edp_supported_link_rates_count == 0)) { + /* for DSC enabled case, we search for minimum lane count */ + memset(&initial_link_setting, 0, sizeof(initial_link_setting)); + initial_link_setting.lane_count = LANE_COUNT_ONE; + initial_link_setting.link_rate = LINK_RATE_LOW; + initial_link_setting.link_spread = LINK_SPREAD_DISABLED; + initial_link_setting.use_link_rate_set = false; + initial_link_setting.link_rate_set = 0; + current_link_setting = initial_link_setting; + if (req_bw > dc_link_bandwidth_kbps(link, &link->verified_link_cap)) + return false; + + /* search for the minimum link setting that: + * 1. is supported according to the link training result + * 2. could support the b/w requested by the timing + */ + while (current_link_setting.link_rate <= + max_link_rate) { + link_bw = dc_link_bandwidth_kbps( + link, + ¤t_link_setting); + if (req_bw <= link_bw) { + *link_setting = current_link_setting; + return true; + } + if (policy) { + /* minimize lane */ + if (current_link_setting.link_rate < max_link_rate) { + current_link_setting.link_rate = + increase_link_rate(link, + current_link_setting.link_rate); + } else { + if (current_link_setting.lane_count < + link->verified_link_cap.lane_count) { + current_link_setting.lane_count = + increase_lane_count( + current_link_setting.lane_count); + current_link_setting.link_rate = initial_link_setting.link_rate; + } else + break; + } + } else { + /* minimize link rate */ + if (current_link_setting.lane_count < + link->verified_link_cap.lane_count) { + current_link_setting.lane_count = + increase_lane_count( + current_link_setting.lane_count); + } else { + current_link_setting.link_rate = + increase_link_rate(link, + current_link_setting.link_rate); + current_link_setting.lane_count = + initial_link_setting.lane_count; + } + } + } + return false; + } + + /* if optimize edp link is supported */ + memset(&initial_link_setting, 0, sizeof(initial_link_setting)); + initial_link_setting.lane_count = LANE_COUNT_ONE; + initial_link_setting.link_rate = link->dpcd_caps.edp_supported_link_rates[0]; + initial_link_setting.link_spread = LINK_SPREAD_DISABLED; + initial_link_setting.use_link_rate_set = true; + initial_link_setting.link_rate_set = 0; + current_link_setting = initial_link_setting; + + /* search for the minimum link setting that: + * 1. is supported according to the link training result + * 2. could support the b/w requested by the timing + */ + while (current_link_setting.link_rate <= + max_link_rate) { + link_bw = dc_link_bandwidth_kbps( + link, + ¤t_link_setting); + if (req_bw <= link_bw) { + *link_setting = current_link_setting; + return true; + } + if (policy) { + /* minimize lane */ + if (current_link_setting.link_rate_set < + link->dpcd_caps.edp_supported_link_rates_count + && current_link_setting.link_rate < max_link_rate) { + current_link_setting.link_rate_set++; + current_link_setting.link_rate = + link->dpcd_caps.edp_supported_link_rates[current_link_setting.link_rate_set]; + } else { + if (current_link_setting.lane_count < link->verified_link_cap.lane_count) { + current_link_setting.lane_count = + increase_lane_count( + current_link_setting.lane_count); + current_link_setting.link_rate_set = initial_link_setting.link_rate_set; + current_link_setting.link_rate = + link->dpcd_caps.edp_supported_link_rates[current_link_setting.link_rate_set]; + } else + break; + } + } else { + /* minimize link rate */ + if (current_link_setting.lane_count < + link->verified_link_cap.lane_count) { + current_link_setting.lane_count = + increase_lane_count( + current_link_setting.lane_count); + } else { + if (current_link_setting.link_rate_set < link->dpcd_caps.edp_supported_link_rates_count) { + current_link_setting.link_rate_set++; + current_link_setting.link_rate = + link->dpcd_caps.edp_supported_link_rates[current_link_setting.link_rate_set]; + current_link_setting.lane_count = + initial_link_setting.lane_count; + } else + break; + } + } + } + return false; +} + static bool decide_mst_link_settings(const struct dc_link *link, struct dc_link_settings *link_setting) { *link_setting = link->verified_link_cap; return true; } -void decide_link_settings(struct dc_stream_state *stream, +bool decide_link_settings(struct dc_stream_state *stream, struct dc_link_settings *link_setting) { - struct dc_link *link; - uint32_t req_bw; - - req_bw = dc_bandwidth_in_kbps_from_timing(&stream->timing); + struct dc_link *link = stream->link; + uint32_t req_bw = dc_bandwidth_in_kbps_from_timing(&stream->timing); - link = stream->link; + memset(link_setting, 0, sizeof(*link_setting)); /* if preferred is specified through AMDDP, use it, if it's enough * to drive the mode @@ -3369,26 +3909,42 @@ void decide_link_settings(struct dc_stream_state *stream, LANE_COUNT_UNKNOWN && link->preferred_link_setting.link_rate != LINK_RATE_UNKNOWN) { - *link_setting = link->preferred_link_setting; - return; + *link_setting = link->preferred_link_setting; + return true; } /* MST doesn't perform link training for now * TODO: add MST specific link training routine */ if (stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST) { - if (decide_mst_link_settings(link, link_setting)) - return; + decide_mst_link_settings(link, link_setting); } else if (link->connector_signal == SIGNAL_TYPE_EDP) { - if (decide_edp_link_settings(link, link_setting, req_bw)) - return; - } else if (decide_dp_link_settings(link, link_setting, req_bw)) - return; - - BREAK_TO_DEBUGGER(); - ASSERT(link->verified_link_cap.lane_count != LANE_COUNT_UNKNOWN); + /* enable edp link optimization for DSC eDP case */ + if (stream->timing.flags.DSC) { + enum dc_link_rate max_link_rate = LINK_RATE_UNKNOWN; + + if (link->panel_config.dsc.force_dsc_edp_policy) { + /* calculate link max link rate cap*/ + struct dc_link_settings tmp_link_setting; + struct dc_crtc_timing tmp_timing = stream->timing; + uint32_t orig_req_bw; + + tmp_link_setting.link_rate = LINK_RATE_UNKNOWN; + tmp_timing.flags.DSC = 0; + orig_req_bw = dc_bandwidth_in_kbps_from_timing(&tmp_timing); + decide_edp_link_settings(link, &tmp_link_setting, orig_req_bw); + max_link_rate = tmp_link_setting.link_rate; + } + decide_edp_link_settings_with_dsc(link, link_setting, req_bw, max_link_rate); + } else { + decide_edp_link_settings(link, link_setting, req_bw); + } + } else { + decide_dp_link_settings(link, link_setting, req_bw); + } - *link_setting = link->verified_link_cap; + return link_setting->lane_count != LANE_COUNT_UNKNOWN && + link_setting->link_rate != LINK_RATE_UNKNOWN; } /*************************Short Pulse IRQ***************************/ @@ -3421,7 +3977,6 @@ static bool handle_hpd_irq_psr_sink(struct dc_link *link) &psr_configuration.raw, sizeof(psr_configuration.raw)); - if (psr_configuration.bits.ENABLE) { unsigned char dpcdbuf[3] = {0}; union psr_error_status psr_error_status; @@ -3453,10 +4008,12 @@ static bool handle_hpd_irq_psr_sink(struct dc_link *link) sizeof(psr_error_status.raw)); /* PSR error, disable and re-enable PSR */ - allow_active = false; - dc_link_set_psr_allow_active(link, &allow_active, true, false, NULL); - allow_active = true; - dc_link_set_psr_allow_active(link, &allow_active, true, false, NULL); + if (link->psr_settings.psr_allow_active) { + allow_active = false; + dc_link_set_psr_allow_active(link, &allow_active, true, false, NULL); + allow_active = true; + dc_link_set_psr_allow_active(link, &allow_active, true, false, NULL); + } return true; } else if (psr_sink_psr_status.bits.SINK_SELF_REFRESH_STATUS == @@ -3472,9 +4029,32 @@ static bool handle_hpd_irq_psr_sink(struct dc_link *link) return false; } +static enum dc_link_rate get_link_rate_from_test_link_rate(uint8_t test_rate) +{ + switch (test_rate) { + case DP_TEST_LINK_RATE_RBR: + return LINK_RATE_LOW; + case DP_TEST_LINK_RATE_HBR: + return LINK_RATE_HIGH; + case DP_TEST_LINK_RATE_HBR2: + return LINK_RATE_HIGH2; + case DP_TEST_LINK_RATE_HBR3: + return LINK_RATE_HIGH3; + case DP_TEST_LINK_RATE_UHBR10: + return LINK_RATE_UHBR10; + case DP_TEST_LINK_RATE_UHBR20: + return LINK_RATE_UHBR20; + case DP_TEST_LINK_RATE_UHBR13_5: + return LINK_RATE_UHBR13_5; + default: + return LINK_RATE_UNKNOWN; + } +} + static void dp_test_send_link_training(struct dc_link *link) { struct dc_link_settings link_settings = {0}; + uint8_t test_rate = 0; core_link_read_dpcd( link, @@ -3484,8 +4064,9 @@ static void dp_test_send_link_training(struct dc_link *link) core_link_read_dpcd( link, DP_TEST_LINK_RATE, - (unsigned char *)(&link_settings.link_rate), + &test_rate, 1); + link_settings.link_rate = get_link_rate_from_test_link_rate(test_rate); /* Set preferred link settings */ link->verified_link_cap.lane_count = link_settings.lane_count; @@ -3503,15 +4084,9 @@ static void dp_test_send_phy_test_pattern(struct dc_link *link) union phy_test_pattern dpcd_test_pattern; union lane_adjust dpcd_lane_adjustment[2]; unsigned char dpcd_post_cursor_2_adjustment = 0; -#if defined(CONFIG_DRM_AMD_DC_DCN) unsigned char test_pattern_buffer[ (DP_TEST_264BIT_CUSTOM_PATTERN_263_256 - DP_TEST_264BIT_CUSTOM_PATTERN_7_0)+1] = {0}; -#else - unsigned char test_pattern_buffer[ - (DP_TEST_80BIT_CUSTOM_PATTERN_79_72 - - DP_TEST_80BIT_CUSTOM_PATTERN_7_0)+1] = {0}; -#endif unsigned int test_pattern_size = 0; enum dp_test_pattern test_pattern; union lane_adjust dpcd_lane_adjust; @@ -3534,6 +4109,17 @@ static void dp_test_send_phy_test_pattern(struct dc_link *link) &dpcd_lane_adjustment[0].raw, sizeof(dpcd_lane_adjustment)); + /* prepare link training settings */ + link_training_settings.link_settings = link->cur_link_settings; + + link_training_settings.lttpr_mode = dp_decide_lttpr_mode(link, &link->cur_link_settings); + + if ((link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) && + link_training_settings.lttpr_mode == LTTPR_MODE_TRANSPARENT) + dp_fixed_vs_pe_read_lane_adjust( + link, + link_training_settings.dpcd_lane_settings); + /*get post cursor 2 parameters * For DP 1.1a or eariler, this DPCD register's value is 0 * For DP 1.2 or later: @@ -3575,7 +4161,6 @@ static void dp_test_send_phy_test_pattern(struct dc_link *link) case PHY_TEST_PATTERN_CP2520_3: test_pattern = DP_TEST_PATTERN_TRAINING_PATTERN4; break; -#if defined(CONFIG_DRM_AMD_DC_DCN) case PHY_TEST_PATTERN_128b_132b_TPS1: test_pattern = DP_TEST_PATTERN_128b_132b_TPS1; break; @@ -3603,7 +4188,6 @@ static void dp_test_send_phy_test_pattern(struct dc_link *link) case PHY_TEST_PATTERN_SQUARE_PULSE: test_pattern = DP_TEST_PATTERN_SQUARE_PULSE; break; -#endif default: test_pattern = DP_TEST_PATTERN_VIDEO_MODE; break; @@ -3619,7 +4203,6 @@ static void dp_test_send_phy_test_pattern(struct dc_link *link) test_pattern_size); } -#if defined(CONFIG_DRM_AMD_DC_DCN) if (test_pattern == DP_TEST_PATTERN_SQUARE_PULSE) { test_pattern_size = 1; // Square pattern data is 1 byte (DP spec) core_link_read_dpcd( @@ -3638,10 +4221,6 @@ static void dp_test_send_phy_test_pattern(struct dc_link *link) test_pattern_buffer, test_pattern_size); } -#endif - - /* prepare link training settings */ - link_training_settings.link_settings = link->cur_link_settings; for (lane = 0; lane < (unsigned int)(link->cur_link_settings.lane_count); @@ -3659,14 +4238,11 @@ static void dp_test_send_phy_test_pattern(struct dc_link *link) link_training_settings.hw_lane_settings[lane].POST_CURSOR2 = (enum dc_post_cursor2) ((dpcd_post_cursor_2_adjustment >> (lane * 2)) & 0x03); - } -#if defined(CONFIG_DRM_AMD_DC_DCN) - else if (dp_get_link_encoding_format(&link->cur_link_settings) == + } else if (dp_get_link_encoding_format(&link->cur_link_settings) == DP_128b_132b_ENCODING) { link_training_settings.hw_lane_settings[lane].FFE_PRESET.raw = dpcd_lane_adjust.tx_ffe.PRESET_VALUE; } -#endif } dp_hw_to_dpcd_lane_settings(&link_training_settings, @@ -3833,7 +4409,7 @@ static void dp_test_get_audio_test_data(struct dc_link *link, bool disable_video &dpcd_pattern_type.value, sizeof(dpcd_pattern_type)); - channel_count = dpcd_test_mode.bits.channel_count + 1; + channel_count = min(dpcd_test_mode.bits.channel_count + 1, AUDIO_CHANNELS_COUNT); // read pattern periods for requested channels when sawTooth pattern is requested if (dpcd_pattern_type.value == AUDIO_TEST_PATTERN_SAWTOOTH || @@ -3958,17 +4534,15 @@ void dc_link_dp_handle_link_loss(struct dc_link *link) for (i = 0; i < MAX_PIPES; i++) { pipe_ctx = &link->dc->current_state->res_ctx.pipe_ctx[i]; if (pipe_ctx && pipe_ctx->stream && !pipe_ctx->stream->dpms_off && - pipe_ctx->stream->link == link && !pipe_ctx->prev_odm_pipe) { + pipe_ctx->stream->link == link && !pipe_ctx->prev_odm_pipe) core_link_disable_stream(pipe_ctx); - } } for (i = 0; i < MAX_PIPES; i++) { pipe_ctx = &link->dc->current_state->res_ctx.pipe_ctx[i]; if (pipe_ctx && pipe_ctx->stream && !pipe_ctx->stream->dpms_off && - pipe_ctx->stream->link == link && !pipe_ctx->prev_odm_pipe) { + pipe_ctx->stream->link == link && !pipe_ctx->prev_odm_pipe) core_link_enable_stream(link->dc->current_state, pipe_ctx); - } } } @@ -4073,6 +4647,8 @@ bool dc_link_handle_hpd_rx_irq(struct dc_link *link, union hpd_irq_data *out_hpd status = false; if (out_link_loss) *out_link_loss = true; + + dp_trace_link_loss_increment(link); } if (link->type == dc_connection_sst_branch && @@ -4153,6 +4729,56 @@ static int translate_dpcd_max_bpc(enum dpcd_downstream_port_max_bpc bpc) return -1; } +#if defined(CONFIG_DRM_AMD_DC_DCN) +uint32_t dc_link_bw_kbps_from_raw_frl_link_rate_data(uint8_t bw) +{ + switch (bw) { + case 0b001: + return 9000000; + case 0b010: + return 18000000; + case 0b011: + return 24000000; + case 0b100: + return 32000000; + case 0b101: + return 40000000; + case 0b110: + return 48000000; + } + + return 0; +} + +/* + * Return PCON's post FRL link training supported BW if its non-zero, otherwise return max_supported_frl_bw. + */ +static uint32_t intersect_frl_link_bw_support( + const uint32_t max_supported_frl_bw_in_kbps, + const union hdmi_encoded_link_bw hdmi_encoded_link_bw) +{ + uint32_t supported_bw_in_kbps = max_supported_frl_bw_in_kbps; + + // HDMI_ENCODED_LINK_BW bits are only valid if HDMI Link Configuration bit is 1 (FRL mode) + if (hdmi_encoded_link_bw.bits.FRL_MODE) { + if (hdmi_encoded_link_bw.bits.BW_48Gbps) + supported_bw_in_kbps = 48000000; + else if (hdmi_encoded_link_bw.bits.BW_40Gbps) + supported_bw_in_kbps = 40000000; + else if (hdmi_encoded_link_bw.bits.BW_32Gbps) + supported_bw_in_kbps = 32000000; + else if (hdmi_encoded_link_bw.bits.BW_24Gbps) + supported_bw_in_kbps = 24000000; + else if (hdmi_encoded_link_bw.bits.BW_18Gbps) + supported_bw_in_kbps = 18000000; + else if (hdmi_encoded_link_bw.bits.BW_9Gbps) + supported_bw_in_kbps = 9000000; + } + + return supported_bw_in_kbps; +} +#endif + static void read_dp_device_vendor_id(struct dc_link *link) { struct dp_device_vendor_id dp_id; @@ -4264,6 +4890,27 @@ static void get_active_converter_info( translate_dpcd_max_bpc( hdmi_color_caps.bits.MAX_BITS_PER_COLOR_COMPONENT); +#if defined(CONFIG_DRM_AMD_DC_DCN) + if (link->dc->caps.dp_hdmi21_pcon_support) { + union hdmi_encoded_link_bw hdmi_encoded_link_bw; + + link->dpcd_caps.dongle_caps.dp_hdmi_frl_max_link_bw_in_kbps = + dc_link_bw_kbps_from_raw_frl_link_rate_data( + hdmi_color_caps.bits.MAX_ENCODED_LINK_BW_SUPPORT); + + // Intersect reported max link bw support with the supported link rate post FRL link training + if (core_link_read_dpcd(link, DP_PCON_HDMI_POST_FRL_STATUS, + &hdmi_encoded_link_bw.raw, sizeof(hdmi_encoded_link_bw)) == DC_OK) { + link->dpcd_caps.dongle_caps.dp_hdmi_frl_max_link_bw_in_kbps = intersect_frl_link_bw_support( + link->dpcd_caps.dongle_caps.dp_hdmi_frl_max_link_bw_in_kbps, + hdmi_encoded_link_bw); + } + + if (link->dpcd_caps.dongle_caps.dp_hdmi_frl_max_link_bw_in_kbps > 0) + link->dpcd_caps.dongle_caps.extendedCapValid = true; + } +#endif + if (link->dpcd_caps.dongle_caps.dp_hdmi_max_pixel_clk_in_khz != 0) link->dpcd_caps.dongle_caps.extendedCapValid = true; } @@ -4292,7 +4939,6 @@ static void get_active_converter_info( dp_hw_fw_revision.ieee_fw_rev, sizeof(dp_hw_fw_revision.ieee_fw_rev)); } -#if defined(CONFIG_DRM_AMD_DC_DCN) if (link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_14 && link->dpcd_caps.dongle_type != DISPLAY_DONGLE_NONE) { union dp_dfp_cap_ext dfp_cap_ext; @@ -4328,7 +4974,6 @@ static void get_active_converter_info( DC_LOG_DP2("\tdfp_cap_ext.max_video_h_active_width = %d", link->dpcd_caps.dongle_caps.dfp_cap_ext.max_video_h_active_width); DC_LOG_DP2("\tdfp_cap_ext.max_video_v_active_height = %d", link->dpcd_caps.dongle_caps.dfp_cap_ext.max_video_v_active_height); } -#endif } static void dp_wa_power_up_0010FA(struct dc_link *link, uint8_t *dpcd_data, @@ -4388,123 +5033,270 @@ static bool dpcd_read_sink_ext_caps(struct dc_link *link) bool dp_retrieve_lttpr_cap(struct dc_link *link) { -#if defined(CONFIG_DRM_AMD_DC_DCN) uint8_t lttpr_dpcd_data[8]; - bool allow_lttpr_non_transparent_mode = 0; -#else - uint8_t lttpr_dpcd_data[6]; -#endif - bool vbios_lttpr_enable = link->dc->caps.vbios_lttpr_enable; - bool vbios_lttpr_interop = link->dc->caps.vbios_lttpr_aware; enum dc_status status = DC_ERROR_UNEXPECTED; bool is_lttpr_present = false; - memset(lttpr_dpcd_data, '\0', sizeof(lttpr_dpcd_data)); + /* Logic to determine LTTPR support*/ + bool vbios_lttpr_interop = link->dc->caps.vbios_lttpr_aware; -#if defined(CONFIG_DRM_AMD_DC_DCN) - if ((link->dc->config.allow_lttpr_non_transparent_mode.bits.DP2_0 && - link->dpcd_caps.channel_coding_cap.bits.DP_128b_132b_SUPPORTED)) { - allow_lttpr_non_transparent_mode = 1; - } else if (link->dc->config.allow_lttpr_non_transparent_mode.bits.DP1_4A && - !link->dpcd_caps.channel_coding_cap.bits.DP_128b_132b_SUPPORTED) { - allow_lttpr_non_transparent_mode = 1; - } -#endif + if (!vbios_lttpr_interop || !link->dc->caps.extended_aux_timeout_support) + return false; - /* - * Logic to determine LTTPR mode + /* By reading LTTPR capability, RX assumes that we will enable + * LTTPR extended aux timeout if LTTPR is present. */ - link->lttpr_mode = LTTPR_MODE_NON_LTTPR; - if (vbios_lttpr_enable && vbios_lttpr_interop) - link->lttpr_mode = LTTPR_MODE_NON_TRANSPARENT; - else if (!vbios_lttpr_enable && vbios_lttpr_interop) { -#if defined(CONFIG_DRM_AMD_DC_DCN) - if (allow_lttpr_non_transparent_mode) -#else - if (link->dc->config.allow_lttpr_non_transparent_mode) -#endif - link->lttpr_mode = LTTPR_MODE_NON_TRANSPARENT; - else - link->lttpr_mode = LTTPR_MODE_TRANSPARENT; - } else if (!vbios_lttpr_enable && !vbios_lttpr_interop) { -#if defined(CONFIG_DRM_AMD_DC_DCN) - if (!allow_lttpr_non_transparent_mode || !link->dc->caps.extended_aux_timeout_support) -#else - if (!link->dc->config.allow_lttpr_non_transparent_mode - || !link->dc->caps.extended_aux_timeout_support) -#endif - link->lttpr_mode = LTTPR_MODE_NON_LTTPR; - else - link->lttpr_mode = LTTPR_MODE_NON_TRANSPARENT; + status = core_link_read_dpcd(link, + DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV, + lttpr_dpcd_data, + sizeof(lttpr_dpcd_data)); + + link->dpcd_caps.lttpr_caps.revision.raw = + lttpr_dpcd_data[DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV - + DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV]; + + link->dpcd_caps.lttpr_caps.max_link_rate = + lttpr_dpcd_data[DP_MAX_LINK_RATE_PHY_REPEATER - + DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV]; + + link->dpcd_caps.lttpr_caps.phy_repeater_cnt = + lttpr_dpcd_data[DP_PHY_REPEATER_CNT - + DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV]; + + link->dpcd_caps.lttpr_caps.max_lane_count = + lttpr_dpcd_data[DP_MAX_LANE_COUNT_PHY_REPEATER - + DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV]; + + link->dpcd_caps.lttpr_caps.mode = + lttpr_dpcd_data[DP_PHY_REPEATER_MODE - + DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV]; + + link->dpcd_caps.lttpr_caps.max_ext_timeout = + lttpr_dpcd_data[DP_PHY_REPEATER_EXTENDED_WAIT_TIMEOUT - + DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV]; + link->dpcd_caps.lttpr_caps.main_link_channel_coding.raw = + lttpr_dpcd_data[DP_MAIN_LINK_CHANNEL_CODING_PHY_REPEATER - + DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV]; + + link->dpcd_caps.lttpr_caps.supported_128b_132b_rates.raw = + lttpr_dpcd_data[DP_PHY_REPEATER_128B132B_RATES - + DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV]; + + /* If this chip cap is set, at least one retimer must exist in the chain + * Override count to 1 if we receive a known bad count (0 or an invalid value) + */ + if (link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN && + (dp_convert_to_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt) == 0)) { + ASSERT(0); + link->dpcd_caps.lttpr_caps.phy_repeater_cnt = 0x80; + DC_LOG_DC("lttpr_caps forced phy_repeater_cnt = %d\n", link->dpcd_caps.lttpr_caps.phy_repeater_cnt); } -#if defined(CONFIG_DRM_AMD_DC_DCN) - /* Check DP tunnel LTTPR mode debug option. */ - if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA && - link->dc->debug.dpia_debug.bits.force_non_lttpr) - link->lttpr_mode = LTTPR_MODE_NON_LTTPR; -#endif - if (link->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT || link->lttpr_mode == LTTPR_MODE_TRANSPARENT) { - /* By reading LTTPR capability, RX assumes that we will enable - * LTTPR extended aux timeout if LTTPR is present. - */ - status = core_link_read_dpcd( - link, - DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV, - lttpr_dpcd_data, - sizeof(lttpr_dpcd_data)); - if (status != DC_OK) { - dm_error("%s: Read LTTPR caps data failed.\n", __func__); - return false; + /* Attempt to train in LTTPR transparent mode if repeater count exceeds 8. */ + is_lttpr_present = dp_is_lttpr_present(link); + + if (is_lttpr_present) + CONN_DATA_DETECT(link, lttpr_dpcd_data, sizeof(lttpr_dpcd_data), "LTTPR Caps: "); + + DC_LOG_DC("is_lttpr_present = %d\n", is_lttpr_present); + return is_lttpr_present; +} + +bool dp_is_lttpr_present(struct dc_link *link) +{ + return (dp_convert_to_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt) != 0 && + link->dpcd_caps.lttpr_caps.max_lane_count > 0 && + link->dpcd_caps.lttpr_caps.max_lane_count <= 4 && + link->dpcd_caps.lttpr_caps.revision.raw >= 0x14); +} + +enum lttpr_mode dp_decide_lttpr_mode(struct dc_link *link, struct dc_link_settings *link_setting) +{ + enum dp_link_encoding encoding = dp_get_link_encoding_format(link_setting); + + if (encoding == DP_8b_10b_ENCODING) + return dp_decide_8b_10b_lttpr_mode(link); + else if (encoding == DP_128b_132b_ENCODING) + return dp_decide_128b_132b_lttpr_mode(link); + + ASSERT(0); + return LTTPR_MODE_NON_LTTPR; +} + +void dp_get_lttpr_mode_override(struct dc_link *link, enum lttpr_mode *override) +{ + if (!dp_is_lttpr_present(link)) + return; + + if (link->dc->debug.lttpr_mode_override == LTTPR_MODE_TRANSPARENT) { + *override = LTTPR_MODE_TRANSPARENT; + } else if (link->dc->debug.lttpr_mode_override == LTTPR_MODE_NON_TRANSPARENT) { + *override = LTTPR_MODE_NON_TRANSPARENT; + } else if (link->dc->debug.lttpr_mode_override == LTTPR_MODE_NON_LTTPR) { + *override = LTTPR_MODE_NON_LTTPR; + } + DC_LOG_DC("lttpr_mode_override chose LTTPR_MODE = %d\n", (uint8_t)(*override)); +} + +enum lttpr_mode dp_decide_8b_10b_lttpr_mode(struct dc_link *link) +{ + bool is_lttpr_present = dp_is_lttpr_present(link); + bool vbios_lttpr_force_non_transparent = link->dc->caps.vbios_lttpr_enable; + bool vbios_lttpr_aware = link->dc->caps.vbios_lttpr_aware; + + if (!is_lttpr_present) + return LTTPR_MODE_NON_LTTPR; + + if (vbios_lttpr_aware) { + if (vbios_lttpr_force_non_transparent) { + DC_LOG_DC("chose LTTPR_MODE_NON_TRANSPARENT due to VBIOS DCE_INFO_CAPS_LTTPR_SUPPORT_ENABLE set to 1.\n"); + return LTTPR_MODE_NON_TRANSPARENT; + } else { + DC_LOG_DC("chose LTTPR_MODE_NON_TRANSPARENT by default due to VBIOS not set DCE_INFO_CAPS_LTTPR_SUPPORT_ENABLE set to 1.\n"); + return LTTPR_MODE_TRANSPARENT; } + } - link->dpcd_caps.lttpr_caps.revision.raw = - lttpr_dpcd_data[DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV - - DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV]; + if (link->dc->config.allow_lttpr_non_transparent_mode.bits.DP1_4A && + link->dc->caps.extended_aux_timeout_support) { + DC_LOG_DC("chose LTTPR_MODE_NON_TRANSPARENT by default and dc->config.allow_lttpr_non_transparent_mode.bits.DP1_4A set to 1.\n"); + return LTTPR_MODE_NON_TRANSPARENT; + } - link->dpcd_caps.lttpr_caps.max_link_rate = - lttpr_dpcd_data[DP_MAX_LINK_RATE_PHY_REPEATER - - DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV]; + DC_LOG_DC("chose LTTPR_MODE_NON_LTTPR.\n"); + return LTTPR_MODE_NON_LTTPR; +} - link->dpcd_caps.lttpr_caps.phy_repeater_cnt = - lttpr_dpcd_data[DP_PHY_REPEATER_CNT - - DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV]; +enum lttpr_mode dp_decide_128b_132b_lttpr_mode(struct dc_link *link) +{ + enum lttpr_mode mode = LTTPR_MODE_NON_LTTPR; - link->dpcd_caps.lttpr_caps.max_lane_count = - lttpr_dpcd_data[DP_MAX_LANE_COUNT_PHY_REPEATER - - DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV]; + if (dp_is_lttpr_present(link)) + mode = LTTPR_MODE_NON_TRANSPARENT; - link->dpcd_caps.lttpr_caps.mode = - lttpr_dpcd_data[DP_PHY_REPEATER_MODE - - DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV]; + DC_LOG_DC("128b_132b chose LTTPR_MODE %d.\n", mode); + return mode; +} - link->dpcd_caps.lttpr_caps.max_ext_timeout = - lttpr_dpcd_data[DP_PHY_REPEATER_EXTENDED_WAIT_TIMEOUT - - DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV]; +static bool get_usbc_cable_id(struct dc_link *link, union dp_cable_id *cable_id) +{ + union dmub_rb_cmd cmd; -#if defined(CONFIG_DRM_AMD_DC_DCN) - link->dpcd_caps.lttpr_caps.main_link_channel_coding.raw = - lttpr_dpcd_data[DP_MAIN_LINK_CHANNEL_CODING_PHY_REPEATER - - DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV]; + if (!link->ctx->dmub_srv || + link->ep_type != DISPLAY_ENDPOINT_PHY || + link->link_enc->features.flags.bits.DP_IS_USB_C == 0) + return false; - link->dpcd_caps.lttpr_caps.supported_128b_132b_rates.raw = - lttpr_dpcd_data[DP_PHY_REPEATER_128b_132b_RATES - - DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV]; -#endif + memset(&cmd, 0, sizeof(cmd)); + cmd.cable_id.header.type = DMUB_CMD_GET_USBC_CABLE_ID; + cmd.cable_id.header.payload_bytes = sizeof(cmd.cable_id.data); + cmd.cable_id.data.input.phy_inst = resource_transmitter_to_phy_idx( + link->dc, link->link_enc->transmitter); + if (dc_dmub_srv_cmd_with_reply_data(link->ctx->dmub_srv, &cmd) && + cmd.cable_id.header.ret_status == 1) { + cable_id->raw = cmd.cable_id.data.output_raw; + DC_LOG_DC("usbc_cable_id = %d.\n", cable_id->raw); + } + return cmd.cable_id.header.ret_status == 1; +} - /* Attempt to train in LTTPR transparent mode if repeater count exceeds 8. */ - is_lttpr_present = (dp_convert_to_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt) != 0 && - link->dpcd_caps.lttpr_caps.phy_repeater_cnt < 0xff && - link->dpcd_caps.lttpr_caps.max_lane_count > 0 && - link->dpcd_caps.lttpr_caps.max_lane_count <= 4 && - link->dpcd_caps.lttpr_caps.revision.raw >= 0x14); - if (is_lttpr_present) { - CONN_DATA_DETECT(link, lttpr_dpcd_data, sizeof(lttpr_dpcd_data), "LTTPR Caps: "); - configure_lttpr_mode_transparent(link); - } else - link->lttpr_mode = LTTPR_MODE_NON_LTTPR; +static union dp_cable_id intersect_cable_id( + union dp_cable_id *a, union dp_cable_id *b) +{ + union dp_cable_id out; + + out.bits.UHBR10_20_CAPABILITY = MIN(a->bits.UHBR10_20_CAPABILITY, + b->bits.UHBR10_20_CAPABILITY); + out.bits.UHBR13_5_CAPABILITY = MIN(a->bits.UHBR13_5_CAPABILITY, + b->bits.UHBR13_5_CAPABILITY); + out.bits.CABLE_TYPE = MAX(a->bits.CABLE_TYPE, b->bits.CABLE_TYPE); + + return out; +} + +static void retrieve_cable_id(struct dc_link *link) +{ + union dp_cable_id usbc_cable_id; + + link->dpcd_caps.cable_id.raw = 0; + core_link_read_dpcd(link, DP_CABLE_ATTRIBUTES_UPDATED_BY_DPRX, + &link->dpcd_caps.cable_id.raw, sizeof(uint8_t)); + + if (get_usbc_cable_id(link, &usbc_cable_id)) + link->dpcd_caps.cable_id = intersect_cable_id( + &link->dpcd_caps.cable_id, &usbc_cable_id); +} + +/* DPRX may take some time to respond to AUX messages after HPD asserted. + * If AUX read unsuccessful, try to wake unresponsive DPRX by toggling DPCD SET_POWER (0x600). + */ +static enum dc_status wa_try_to_wake_dprx(struct dc_link *link, uint64_t timeout_ms) +{ + enum dc_status status = DC_ERROR_UNEXPECTED; + uint8_t dpcd_data = 0; + uint64_t start_ts = 0; + uint64_t current_ts = 0; + uint64_t time_taken_ms = 0; + enum dc_connection_type type = dc_connection_none; + bool lttpr_present; + bool vbios_lttpr_interop = link->dc->caps.vbios_lttpr_aware; + + lttpr_present = dp_is_lttpr_present(link) || + (!vbios_lttpr_interop || !link->dc->caps.extended_aux_timeout_support); + DC_LOG_DC("lttpr_present = %d.\n", lttpr_present ? 1 : 0); + + /* Issue an AUX read to test DPRX responsiveness. If LTTPR is supported the first read is expected to + * be to determine LTTPR capabilities. Otherwise trying to read power state should be an innocuous AUX read. + */ + if (lttpr_present) + status = core_link_read_dpcd( + link, + DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV, + &dpcd_data, + sizeof(dpcd_data)); + else + status = core_link_read_dpcd( + link, + DP_SET_POWER, + &dpcd_data, + sizeof(dpcd_data)); + + if (status != DC_OK) { + DC_LOG_WARNING("%s: Read DPCD LTTPR_CAP failed - try to toggle DPCD SET_POWER for %lld ms.", + __func__, + timeout_ms); + start_ts = dm_get_timestamp(link->ctx); + + do { + if (!dc_link_detect_sink(link, &type) || type == dc_connection_none) + break; + + dpcd_data = DP_SET_POWER_D3; + status = core_link_write_dpcd( + link, + DP_SET_POWER, + &dpcd_data, + sizeof(dpcd_data)); + + dpcd_data = DP_SET_POWER_D0; + status = core_link_write_dpcd( + link, + DP_SET_POWER, + &dpcd_data, + sizeof(dpcd_data)); + + current_ts = dm_get_timestamp(link->ctx); + time_taken_ms = div_u64(dm_get_elapse_time_in_ns(link->ctx, current_ts, start_ts), 1000000); + } while (status != DC_OK && time_taken_ms < timeout_ms); + + DC_LOG_WARNING("%s: DPCD SET_POWER %s after %lld ms%s", + __func__, + (status == DC_OK) ? "succeeded" : "failed", + time_taken_ms, + (type == dc_connection_none) ? ". Unplugged." : "."); } - return is_lttpr_present; + + return status; } static bool retrieve_link_cap(struct dc_link *link) @@ -4524,6 +5316,7 @@ static bool retrieve_link_cap(struct dc_link *link) union dp_downstream_port_present ds_port = { 0 }; enum dc_status status = DC_ERROR_UNEXPECTED; uint32_t read_dpcd_retry_cnt = 3; + uint32_t aux_channel_retry_cnt = 0; int i; struct dp_sink_hw_fw_revision dp_hw_fw_revision; const uint32_t post_oui_delay = 30; // 30ms @@ -4542,20 +5335,55 @@ static bool retrieve_link_cap(struct dc_link *link) dc_link_aux_try_to_configure_timeout(link->ddc, LINK_AUX_DEFAULT_LTTPR_TIMEOUT_PERIOD); + /* Try to ensure AUX channel active before proceeding. */ + if (link->dc->debug.aux_wake_wa.bits.enable_wa) { + uint64_t timeout_ms = link->dc->debug.aux_wake_wa.bits.timeout_ms; + + if (link->dc->debug.aux_wake_wa.bits.use_default_timeout) + timeout_ms = LINK_AUX_WAKE_TIMEOUT_MS; + status = wa_try_to_wake_dprx(link, timeout_ms); + } + + while (status != DC_OK && aux_channel_retry_cnt < 10) { + status = core_link_read_dpcd(link, DP_SET_POWER, + &dpcd_power_state, sizeof(dpcd_power_state)); + + /* Delay 1 ms if AUX CH is in power down state. Based on spec + * section 2.3.1.2, if AUX CH may be powered down due to + * write to DPCD 600h = 2. Sink AUX CH is monitoring differential + * signal and may need up to 1 ms before being able to reply. + */ + if (status != DC_OK || dpcd_power_state == DP_SET_POWER_D3) { + udelay(1000); + aux_channel_retry_cnt++; + } + } + + /* If aux channel is not active, return false and trigger another detect*/ + if (status != DC_OK) { + dpcd_power_state = DP_SET_POWER_D0; + status = core_link_write_dpcd( + link, + DP_SET_POWER, + &dpcd_power_state, + sizeof(dpcd_power_state)); + + dpcd_power_state = DP_SET_POWER_D3; + status = core_link_write_dpcd( + link, + DP_SET_POWER, + &dpcd_power_state, + sizeof(dpcd_power_state)); + return false; + } + is_lttpr_present = dp_retrieve_lttpr_cap(link); - /* Read DP tunneling information. */ - status = dpcd_get_tunneling_device_data(link); - status = core_link_read_dpcd(link, DP_SET_POWER, - &dpcd_power_state, sizeof(dpcd_power_state)); + if (is_lttpr_present) + configure_lttpr_mode_transparent(link); - /* Delay 1 ms if AUX CH is in power down state. Based on spec - * section 2.3.1.2, if AUX CH may be powered down due to - * write to DPCD 600h = 2. Sink AUX CH is monitoring differential - * signal and may need up to 1 ms before being able to reply. - */ - if (status != DC_OK || dpcd_power_state == DP_SET_POWER_D3) - udelay(1000); + /* Read DP tunneling information. */ + status = dpcd_get_tunneling_device_data(link); dpcd_set_source_specific_data(link); /* Sink may need to configure internals based on vendor, so allow some @@ -4649,6 +5477,9 @@ static bool retrieve_link_cap(struct dc_link *link) read_dp_device_vendor_id(link); + /* TODO - decouple raw mst capability from policy decision */ + link->dpcd_caps.is_mst_capable = is_mst_supported(link); + get_active_converter_info(ds_port.byte, link); dp_wa_power_up_0010FA(link, dpcd_data, sizeof(dpcd_data)); @@ -4667,8 +5498,8 @@ static bool retrieve_link_cap(struct dc_link *link) link->reported_link_cap.lane_count = link->dpcd_caps.max_ln_count.bits.MAX_LANE_COUNT; - link->reported_link_cap.link_rate = dpcd_data[ - DP_MAX_LINK_RATE - DP_DPCD_REV]; + link->reported_link_cap.link_rate = get_link_rate_from_max_link_bw( + dpcd_data[DP_MAX_LINK_RATE - DP_DPCD_REV]); link->reported_link_cap.link_spread = link->dpcd_caps.max_down_spread.bits.MAX_DOWN_SPREAD ? LINK_SPREAD_05_DOWNSPREAD_30KHZ : LINK_SPREAD_DISABLED; @@ -4679,7 +5510,8 @@ static bool retrieve_link_cap(struct dc_link *link) edp_config_cap.bits.ALT_SCRAMBLER_RESET; link->dpcd_caps.dpcd_display_control_capable = edp_config_cap.bits.DPCD_DISPLAY_CONTROL_CAPABLE; - + link->dpcd_caps.channel_coding_cap.raw = + dpcd_data[DP_MAIN_LINK_CHANNEL_CODING - DP_DPCD_REV]; link->test_pattern_enabled = false; link->compliance_test_state.raw = 0; @@ -4730,6 +5562,26 @@ static bool retrieve_link_cap(struct dc_link *link) dp_hw_fw_revision.ieee_fw_rev, sizeof(dp_hw_fw_revision.ieee_fw_rev)); + /* Quirk for Apple MBP 2018 15" Retina panels: wrong DP_MAX_LINK_RATE */ + { + uint8_t str_mbp_2018[] = { 101, 68, 21, 103, 98, 97 }; + uint8_t fwrev_mbp_2018[] = { 7, 4 }; + uint8_t fwrev_mbp_2018_vega[] = { 8, 4 }; + + /* We also check for the firmware revision as 16,1 models have an + * identical device id and are incorrectly quirked otherwise. + */ + if ((link->dpcd_caps.sink_dev_id == 0x0010fa) && + !memcmp(link->dpcd_caps.sink_dev_id_str, str_mbp_2018, + sizeof(str_mbp_2018)) && + (!memcmp(link->dpcd_caps.sink_fw_revision, fwrev_mbp_2018, + sizeof(fwrev_mbp_2018)) || + !memcmp(link->dpcd_caps.sink_fw_revision, fwrev_mbp_2018_vega, + sizeof(fwrev_mbp_2018_vega)))) { + link->reported_link_cap.link_rate = LINK_RATE_RBR2; + } + } + memset(&link->dpcd_caps.dsc_caps, '\0', sizeof(link->dpcd_caps.dsc_caps)); memset(&link->dpcd_caps.fec_cap, '\0', sizeof(link->dpcd_caps.fec_cap)); @@ -4745,7 +5597,6 @@ static bool retrieve_link_cap(struct dc_link *link) DP_DSC_SUPPORT, link->dpcd_caps.dsc_caps.dsc_basic_caps.raw, sizeof(link->dpcd_caps.dsc_caps.dsc_basic_caps.raw)); -#if defined(CONFIG_DRM_AMD_DC_DCN) if (link->dpcd_caps.dongle_type != DISPLAY_DONGLE_NONE) { status = core_link_read_dpcd( link, @@ -4760,21 +5611,31 @@ static bool retrieve_link_cap(struct dc_link *link) DC_LOG_DSC("\tBRANCH_MAX_LINE_WIDTH 0x%02x", link->dpcd_caps.dsc_caps.dsc_branch_decoder_caps.fields.BRANCH_MAX_LINE_WIDTH); } -#else - status = core_link_read_dpcd( - link, - DP_DSC_BRANCH_OVERALL_THROUGHPUT_0, - link->dpcd_caps.dsc_caps.dsc_branch_decoder_caps.raw, - sizeof(link->dpcd_caps.dsc_caps.dsc_branch_decoder_caps.raw)); -#endif + + /* Apply work around to disable FEC and DSC for USB4 tunneling in TBT3 compatibility mode + * only if required. + */ + if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA && + link->dc->debug.dpia_debug.bits.enable_force_tbt3_work_around && + link->dpcd_caps.is_branch_dev && + link->dpcd_caps.branch_dev_id == DP_BRANCH_DEVICE_ID_90CC24 && + link->dpcd_caps.branch_hw_revision == DP_BRANCH_HW_REV_10 && + (link->dpcd_caps.fec_cap.bits.FEC_CAPABLE || + link->dpcd_caps.dsc_caps.dsc_basic_caps.fields.dsc_support.DSC_SUPPORT)) { + /* A TBT3 device is expected to report no support for FEC or DSC to a USB4 DPIA. + * Clear FEC and DSC capabilities as a work around if that is not the case. + */ + link->wa_flags.dpia_forced_tbt3_mode = true; + memset(&link->dpcd_caps.dsc_caps, '\0', sizeof(link->dpcd_caps.dsc_caps)); + memset(&link->dpcd_caps.fec_cap, '\0', sizeof(link->dpcd_caps.fec_cap)); + DC_LOG_DSC("Clear DSC SUPPORT for USB4 link(%d) in TBT3 compatibility mode", link->link_index); + } else + link->wa_flags.dpia_forced_tbt3_mode = false; } if (!dpcd_read_sink_ext_caps(link)) link->dpcd_sink_ext_caps.raw = 0; -#if defined(CONFIG_DRM_AMD_DC_DCN) - link->dpcd_caps.channel_coding_cap.raw = dpcd_data[DP_MAIN_LINK_CHANNEL_CODING_CAP - DP_DPCD_REV]; - if (link->dpcd_caps.channel_coding_cap.bits.DP_128b_132b_SUPPORTED) { DC_LOG_DP2("128b/132b encoding is supported at link %d", link->link_index); @@ -4819,7 +5680,9 @@ static bool retrieve_link_cap(struct dc_link *link) if (link->dpcd_caps.fec_cap1.bits.AGGREGATED_ERROR_COUNTERS_CAPABLE) DC_LOG_DP2("\tFEC aggregated error counters are supported"); } -#endif + + retrieve_cable_id(link); + dpcd_write_cable_id_to_dprx(link); /* Connectivity log: detection */ CONN_DATA_DETECT(link, dpcd_data, sizeof(dpcd_data), "Rx Caps: "); @@ -4892,14 +5755,6 @@ bool dp_overwrite_extended_receiver_cap(struct dc_link *link) bool detect_dp_sink_caps(struct dc_link *link) { return retrieve_link_cap(link); - - /* dc init_hw has power encoder using default - * signal for connector. For native DP, no - * need to power up encoder again. If not native - * DP, hw_init may need check signal or power up - * encoder here. - */ - /* TODO save sink caps in link->sink */ } static enum dc_link_rate linkRateInKHzToLinkRateMultiplier(uint32_t link_rate_in_khz) @@ -4945,6 +5800,7 @@ void detect_edp_sink_caps(struct dc_link *link) uint32_t link_rate_in_khz; enum dc_link_rate link_rate = LINK_RATE_UNKNOWN; uint8_t backlight_adj_cap; + uint8_t general_edp_cap; retrieve_link_cap(link); link->dpcd_caps.edp_supported_link_rates_count = 0; @@ -4955,7 +5811,7 @@ void detect_edp_sink_caps(struct dc_link *link) * Per VESA eDP spec, "The DPCD revision for eDP v1.4 is 13h" */ if (link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_13 && - (link->dc->debug.optimize_edp_link_rate || + (link->panel_config.ilr.optimize_edp_link_rate || link->reported_link_cap.link_rate == LINK_RATE_UNKNOWN)) { // Read DPCD 00010h - 0001Fh 16 bytes at one shot core_link_read_dpcd(link, DP_SUPPORTED_LINK_RATES, @@ -4977,15 +5833,51 @@ void detect_edp_sink_caps(struct dc_link *link) } } } - link->verified_link_cap = link->reported_link_cap; - core_link_read_dpcd(link, DP_EDP_BACKLIGHT_ADJUSTMENT_CAP, &backlight_adj_cap, sizeof(backlight_adj_cap)); link->dpcd_caps.dynamic_backlight_capable_edp = (backlight_adj_cap & DP_EDP_DYNAMIC_BACKLIGHT_CAP) ? true:false; + core_link_read_dpcd(link, DP_EDP_GENERAL_CAP_1, + &general_edp_cap, sizeof(general_edp_cap)); + + link->dpcd_caps.set_power_state_capable_edp = + (general_edp_cap & DP_EDP_SET_POWER_CAP) ? true:false; + dc_link_set_default_brightness_aux(link); + + core_link_read_dpcd(link, DP_EDP_DPCD_REV, + &link->dpcd_caps.edp_rev, + sizeof(link->dpcd_caps.edp_rev)); + /* + * PSR is only valid for eDP v1.3 or higher. + */ + if (link->dpcd_caps.edp_rev >= DP_EDP_13) { + core_link_read_dpcd(link, DP_PSR_SUPPORT, + &link->dpcd_caps.psr_info.psr_version, + sizeof(link->dpcd_caps.psr_info.psr_version)); + if (link->dpcd_caps.sink_dev_id == DP_BRANCH_DEVICE_ID_001CF8) + core_link_read_dpcd(link, DP_FORCE_PSRSU_CAPABILITY, + &link->dpcd_caps.psr_info.force_psrsu_cap, + sizeof(link->dpcd_caps.psr_info.force_psrsu_cap)); + core_link_read_dpcd(link, DP_PSR_CAPS, + &link->dpcd_caps.psr_info.psr_dpcd_caps.raw, + sizeof(link->dpcd_caps.psr_info.psr_dpcd_caps.raw)); + if (link->dpcd_caps.psr_info.psr_dpcd_caps.bits.Y_COORDINATE_REQUIRED) { + core_link_read_dpcd(link, DP_PSR2_SU_Y_GRANULARITY, + &link->dpcd_caps.psr_info.psr2_su_y_granularity_cap, + sizeof(link->dpcd_caps.psr_info.psr2_su_y_granularity_cap)); + } + } + + /* + * ALPM is only valid for eDP v1.4 or higher. + */ + if (link->dpcd_caps.dpcd_rev.raw >= DP_EDP_14) + core_link_read_dpcd(link, DP_RECEIVER_ALPM_CAP, + &link->dpcd_caps.alpm_caps.raw, + sizeof(link->dpcd_caps.alpm_caps.raw)); } void dc_link_dp_enable_hpd(const struct dc_link *link) @@ -5144,7 +6036,7 @@ static void set_crtc_test_pattern(struct dc_link *link, else if (link->dc->hwss.set_disp_pattern_generator) { struct pipe_ctx *odm_pipe; int opp_cnt = 1; - int dpg_width = width; + int dpg_width; for (odm_pipe = pipe_ctx->next_odm_pipe; odm_pipe; odm_pipe = odm_pipe->next_odm_pipe) opp_cnt++; @@ -5218,7 +6110,7 @@ bool dc_link_dp_set_test_pattern( DP_TEST_PATTERN_VIDEO_MODE) { /* Set CRTC Test Pattern */ set_crtc_test_pattern(link, pipe_ctx, test_pattern, test_pattern_color_space); - dp_set_hw_test_pattern(link, test_pattern, + dp_set_hw_test_pattern(link, &pipe_ctx->link_res, test_pattern, (uint8_t *)p_custom_pattern, (uint32_t)cust_pattern_size); @@ -5240,7 +6132,15 @@ bool dc_link_dp_set_test_pattern( if (is_dp_phy_pattern(test_pattern)) { /* Set DPCD Lane Settings before running test pattern */ if (p_link_settings != NULL) { - dp_set_hw_lane_settings(link, p_link_settings, DPRX); + if ((link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) && + p_link_settings->lttpr_mode == LTTPR_MODE_TRANSPARENT) { + dp_fixed_vs_pe_set_retimer_lane_settings( + link, + p_link_settings->dpcd_lane_settings, + p_link_settings->link_settings.lane_count); + } else { + dp_set_hw_lane_settings(link, &pipe_ctx->link_res, p_link_settings, DPRX); + } dpcd_set_lane_settings(link, p_link_settings, DPRX); } @@ -5254,7 +6154,7 @@ bool dc_link_dp_set_test_pattern( pipes->stream_res.stream_enc->funcs->dp_blank(link, pipe_ctx->stream_res.stream_enc); } - dp_set_hw_test_pattern(link, test_pattern, + dp_set_hw_test_pattern(link, &pipe_ctx->link_res, test_pattern, (uint8_t *)p_custom_pattern, (uint32_t)cust_pattern_size); @@ -5291,7 +6191,6 @@ bool dc_link_dp_set_test_pattern( case DP_TEST_PATTERN_CP2520_3: pattern = PHY_TEST_PATTERN_CP2520_3; break; -#if defined(CONFIG_DRM_AMD_DC_DCN) case DP_TEST_PATTERN_128b_132b_TPS1: pattern = PHY_TEST_PATTERN_128b_132b_TPS1; break; @@ -5319,7 +6218,6 @@ bool dc_link_dp_set_test_pattern( case DP_TEST_PATTERN_SQUARE_PULSE: pattern = PHY_TEST_PATTERN_SQUARE_PULSE; break; -#endif default: return false; } @@ -5574,7 +6472,7 @@ enum dp_panel_mode dp_get_panel_mode(struct dc_link *link) return DP_PANEL_MODE_DEFAULT; } -enum dc_status dp_set_fec_ready(struct dc_link *link, bool ready) +enum dc_status dp_set_fec_ready(struct dc_link *link, const struct link_resource *link_res, bool ready) { /* FEC has to be "set ready" before the link training. * The policy is to always train with FEC @@ -5585,14 +6483,7 @@ enum dc_status dp_set_fec_ready(struct dc_link *link, bool ready) enum dc_status status = DC_OK; uint8_t fec_config = 0; - /* Access link encoder based on whether it is statically - * or dynamically assigned to a link. - */ - if (link->is_dig_mapping_flexible && - link->dc->res_pool->funcs->link_encs_assign) - link_enc = link_enc_cfg_get_link_enc_used_by_link(link->ctx->dc, link); - else - link_enc = link->link_enc; + link_enc = link_enc_cfg_get_link_enc(link); ASSERT(link_enc); if (!dc_link_should_enable_fec(link)) @@ -5632,14 +6523,7 @@ void dp_set_fec_enable(struct dc_link *link, bool enable) { struct link_encoder *link_enc = NULL; - /* Access link encoder based on whether it is statically - * or dynamically assigned to a link. - */ - if (link->is_dig_mapping_flexible && - link->dc->res_pool->funcs->link_encs_assign) - link_enc = link_enc_cfg_get_link_enc_used_by_link(link->ctx->dc, link); - else - link_enc = link->link_enc; + link_enc = link_enc_cfg_get_link_enc(link); ASSERT(link_enc); if (!dc_link_should_enable_fec(link)) @@ -5741,6 +6625,20 @@ void dpcd_set_source_specific_data(struct dc_link *link) } } +void dpcd_write_cable_id_to_dprx(struct dc_link *link) +{ + if (!link->dpcd_caps.channel_coding_cap.bits.DP_128b_132b_SUPPORTED || + link->dpcd_caps.cable_id.raw == 0 || + link->dprx_states.cable_id_written) + return; + + core_link_write_dpcd(link, DP_CABLE_ATTRIBUTES_UPDATED_BY_DPTX, + &link->dpcd_caps.cable_id.raw, + sizeof(link->dpcd_caps.cable_id.raw)); + + link->dprx_states.cable_id_written = 1; +} + bool dc_link_set_backlight_level_nits(struct dc_link *link, bool isHDR, uint32_t backlight_millinits, @@ -5862,7 +6760,7 @@ bool is_edp_ilr_optimization_required(struct dc_link *link, struct dc_crtc_timin ASSERT(link || crtc_timing); // invalid input if (link->dpcd_caps.edp_supported_link_rates_count == 0 || - !link->dc->debug.optimize_edp_link_rate) + !link->panel_config.ilr.optimize_edp_link_rate) return false; @@ -5885,7 +6783,10 @@ bool is_edp_ilr_optimization_required(struct dc_link *link, struct dc_crtc_timin req_bw = dc_bandwidth_in_kbps_from_timing(crtc_timing); - decide_edp_link_settings(link, &link_setting, req_bw); + if (!crtc_timing->flags.DSC) + decide_edp_link_settings(link, &link_setting, req_bw); + else + decide_edp_link_settings_with_dsc(link, &link_setting, req_bw, LINK_RATE_UNKNOWN); if (link->dpcd_caps.edp_supported_link_rates[link_rate_set] != link_setting.link_rate || lane_count_set.bits.LANE_COUNT_SET != link_setting.lane_count) { @@ -5902,15 +6803,12 @@ enum dp_link_encoding dp_get_link_encoding_format(const struct dc_link_settings if ((link_settings->link_rate >= LINK_RATE_LOW) && (link_settings->link_rate <= LINK_RATE_HIGH3)) return DP_8b_10b_ENCODING; -#if defined(CONFIG_DRM_AMD_DC_DCN) else if ((link_settings->link_rate >= LINK_RATE_UHBR10) && (link_settings->link_rate <= LINK_RATE_UHBR20)) return DP_128b_132b_ENCODING; -#endif return DP_UNKNOWN_ENCODING; } -#if defined(CONFIG_DRM_AMD_DC_DCN) enum dp_link_encoding dc_link_dp_mst_decide_link_encoding_format(const struct dc_link *link) { struct dc_link_settings link_settings = {0}; @@ -5975,10 +6873,21 @@ bool dpcd_write_128b_132b_sst_payload_allocation_table( if (allocate) { avg_time_slots_per_mtp = calculate_sst_avg_time_slots_per_mtp(stream, link); req_slot_count = dc_fixpt_ceil(avg_time_slots_per_mtp); + /// Validation should filter out modes that exceed link BW + ASSERT(req_slot_count <= MAX_MTP_SLOT_COUNT); + if (req_slot_count > MAX_MTP_SLOT_COUNT) + return false; } else { /// Leave req_slot_count = 0 if allocate is false. } + proposed_table->stream_count = 1; /// Always 1 stream for SST + proposed_table->stream_allocations[0].slot_count = req_slot_count; + proposed_table->stream_allocations[0].vcp_id = vc_id; + + if (link->aux_access_disabled) + return true; + /// Write DPCD 2C0 = 1 to start updating update_status.bits.VC_PAYLOAD_TABLE_UPDATED = 1; core_link_write_dpcd( @@ -6002,7 +6911,6 @@ bool dpcd_write_128b_132b_sst_payload_allocation_table( &start_time_slot, 1); - ASSERT(req_slot_count <= MAX_MTP_SLOT_COUNT); /// Validation should filter out modes that exceed link BW core_link_write_dpcd( link, DP_PAYLOAD_ALLOCATE_TIME_SLOT_COUNT, @@ -6038,7 +6946,7 @@ bool dpcd_write_128b_132b_sst_payload_allocation_table( } } retries++; - udelay(5000); + msleep(5); } if (!result && retries == max_retries) { @@ -6047,10 +6955,6 @@ bool dpcd_write_128b_132b_sst_payload_allocation_table( // TODO - DP2.0 Payload: Read and log the payload table from downstream branch } - proposed_table->stream_count = 1; /// Always 1 stream for SST - proposed_table->stream_allocations[0].slot_count = req_slot_count; - proposed_table->stream_allocations[0].vcp_id = vc_id; - return result; } @@ -6066,6 +6970,8 @@ bool dpcd_poll_for_allocation_change_trigger(struct dc_link *link) union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX]; union lane_align_status_updated lane_status_updated; + if (link->aux_access_disabled) + return true; for (i = 0; i < act_retries; i++) { get_lane_status(link, link->cur_link_settings.lane_count, dpcd_lane_status, &lane_status_updated); @@ -6090,7 +6996,7 @@ bool dpcd_poll_for_allocation_change_trigger(struct dc_link *link) break; } - udelay(5000); + msleep(5); } if (result == ACT_FAILED) { @@ -6121,8 +7027,572 @@ struct fixed31_32 calculate_sst_avg_time_slots_per_mtp( bool is_dp_128b_132b_signal(struct pipe_ctx *pipe_ctx) { + /* If this assert is hit then we have a link encoder dynamic management issue */ + ASSERT(pipe_ctx->stream_res.hpo_dp_stream_enc ? pipe_ctx->link_res.hpo_dp_link_enc != NULL : true); return (pipe_ctx->stream_res.hpo_dp_stream_enc && - pipe_ctx->stream->link->hpo_dp_link_enc && + pipe_ctx->link_res.hpo_dp_link_enc && dc_is_dp_signal(pipe_ctx->stream->signal)); } -#endif + +void edp_panel_backlight_power_on(struct dc_link *link, bool wait_for_hpd) +{ + if (link->connector_signal != SIGNAL_TYPE_EDP) + return; + + link->dc->hwss.edp_power_control(link, true); + if (wait_for_hpd) + link->dc->hwss.edp_wait_for_hpd_ready(link, true); + if (link->dc->hwss.edp_backlight_control) + link->dc->hwss.edp_backlight_control(link, true); +} + +void dc_link_clear_dprx_states(struct dc_link *link) +{ + memset(&link->dprx_states, 0, sizeof(link->dprx_states)); +} + +void dp_receiver_power_ctrl(struct dc_link *link, bool on) +{ + uint8_t state; + + state = on ? DP_POWER_STATE_D0 : DP_POWER_STATE_D3; + + if (link->sync_lt_in_progress) + return; + + core_link_write_dpcd(link, DP_SET_POWER, &state, + sizeof(state)); + +} + +void dp_source_sequence_trace(struct dc_link *link, uint8_t dp_test_mode) +{ + if (link != NULL && link->dc->debug.enable_driver_sequence_debug) + core_link_write_dpcd(link, DP_SOURCE_SEQUENCE, + &dp_test_mode, sizeof(dp_test_mode)); +} + + +static uint8_t convert_to_count(uint8_t lttpr_repeater_count) +{ + switch (lttpr_repeater_count) { + case 0x80: // 1 lttpr repeater + return 1; + case 0x40: // 2 lttpr repeaters + return 2; + case 0x20: // 3 lttpr repeaters + return 3; + case 0x10: // 4 lttpr repeaters + return 4; + case 0x08: // 5 lttpr repeaters + return 5; + case 0x04: // 6 lttpr repeaters + return 6; + case 0x02: // 7 lttpr repeaters + return 7; + case 0x01: // 8 lttpr repeaters + return 8; + default: + break; + } + return 0; // invalid value +} + +static inline bool is_immediate_downstream(struct dc_link *link, uint32_t offset) +{ + return (convert_to_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt) == offset); +} + +void dp_enable_link_phy( + struct dc_link *link, + const struct link_resource *link_res, + enum signal_type signal, + enum clock_source_id clock_source, + const struct dc_link_settings *link_settings) +{ + link->cur_link_settings = *link_settings; + link->dc->hwss.enable_dp_link_output(link, link_res, signal, + clock_source, link_settings); + dp_receiver_power_ctrl(link, true); +} + +void edp_add_delay_for_T9(struct dc_link *link) +{ + if (link && link->panel_config.pps.extra_delay_backlight_off > 0) + udelay(link->panel_config.pps.extra_delay_backlight_off * 1000); +} + +bool edp_receiver_ready_T9(struct dc_link *link) +{ + unsigned int tries = 0; + unsigned char sinkstatus = 0; + unsigned char edpRev = 0; + enum dc_status result = DC_OK; + + result = core_link_read_dpcd(link, DP_EDP_DPCD_REV, &edpRev, sizeof(edpRev)); + + /* start from eDP version 1.2, SINK_STAUS indicate the sink is ready.*/ + if (result == DC_OK && edpRev >= DP_EDP_12) { + do { + sinkstatus = 1; + result = core_link_read_dpcd(link, DP_SINK_STATUS, &sinkstatus, sizeof(sinkstatus)); + if (sinkstatus == 0) + break; + if (result != DC_OK) + break; + udelay(100); //MAx T9 + } while (++tries < 50); + } + + return result; +} +bool edp_receiver_ready_T7(struct dc_link *link) +{ + unsigned char sinkstatus = 0; + unsigned char edpRev = 0; + enum dc_status result = DC_OK; + + /* use absolute time stamp to constrain max T7*/ + unsigned long long enter_timestamp = 0; + unsigned long long finish_timestamp = 0; + unsigned long long time_taken_in_ns = 0; + + result = core_link_read_dpcd(link, DP_EDP_DPCD_REV, &edpRev, sizeof(edpRev)); + + if (result == DC_OK && edpRev >= DP_EDP_12) { + /* start from eDP version 1.2, SINK_STAUS indicate the sink is ready.*/ + enter_timestamp = dm_get_timestamp(link->ctx); + do { + sinkstatus = 0; + result = core_link_read_dpcd(link, DP_SINK_STATUS, &sinkstatus, sizeof(sinkstatus)); + if (sinkstatus == 1) + break; + if (result != DC_OK) + break; + udelay(25); + finish_timestamp = dm_get_timestamp(link->ctx); + time_taken_in_ns = dm_get_elapse_time_in_ns(link->ctx, finish_timestamp, enter_timestamp); + } while (time_taken_in_ns < 50 * 1000000); //MAx T7 is 50ms + } + + if (link && link->panel_config.pps.extra_t7_ms > 0) + udelay(link->panel_config.pps.extra_t7_ms * 1000); + + return result; +} + +void dp_disable_link_phy(struct dc_link *link, const struct link_resource *link_res, + enum signal_type signal) +{ + struct dc *dc = link->ctx->dc; + + if (!link->wa_flags.dp_keep_receiver_powered) + dp_receiver_power_ctrl(link, false); + + dc->hwss.disable_link_output(link, link_res, signal); + /* Clear current link setting.*/ + memset(&link->cur_link_settings, 0, + sizeof(link->cur_link_settings)); + + if (dc->clk_mgr->funcs->notify_link_rate_change) + dc->clk_mgr->funcs->notify_link_rate_change(dc->clk_mgr, link); +} + +void dp_disable_link_phy_mst(struct dc_link *link, const struct link_resource *link_res, + enum signal_type signal) +{ + /* MST disable link only when no stream use the link */ + if (link->mst_stream_alloc_table.stream_count > 0) + return; + + dp_disable_link_phy(link, link_res, signal); + + /* set the sink to SST mode after disabling the link */ + dp_enable_mst_on_sink(link, false); +} + +bool dp_set_hw_training_pattern( + struct dc_link *link, + const struct link_resource *link_res, + enum dc_dp_training_pattern pattern, + uint32_t offset) +{ + enum dp_test_pattern test_pattern = DP_TEST_PATTERN_UNSUPPORTED; + + switch (pattern) { + case DP_TRAINING_PATTERN_SEQUENCE_1: + test_pattern = DP_TEST_PATTERN_TRAINING_PATTERN1; + break; + case DP_TRAINING_PATTERN_SEQUENCE_2: + test_pattern = DP_TEST_PATTERN_TRAINING_PATTERN2; + break; + case DP_TRAINING_PATTERN_SEQUENCE_3: + test_pattern = DP_TEST_PATTERN_TRAINING_PATTERN3; + break; + case DP_TRAINING_PATTERN_SEQUENCE_4: + test_pattern = DP_TEST_PATTERN_TRAINING_PATTERN4; + break; + case DP_128b_132b_TPS1: + test_pattern = DP_TEST_PATTERN_128b_132b_TPS1_TRAINING_MODE; + break; + case DP_128b_132b_TPS2: + test_pattern = DP_TEST_PATTERN_128b_132b_TPS2_TRAINING_MODE; + break; + default: + break; + } + + dp_set_hw_test_pattern(link, link_res, test_pattern, NULL, 0); + + return true; +} + +void dp_set_hw_lane_settings( + struct dc_link *link, + const struct link_resource *link_res, + const struct link_training_settings *link_settings, + uint32_t offset) +{ + const struct link_hwss *link_hwss = get_link_hwss(link, link_res); + + if ((link_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) && !is_immediate_downstream(link, offset)) + return; + + if (link_hwss->ext.set_dp_lane_settings) + link_hwss->ext.set_dp_lane_settings(link, link_res, + &link_settings->link_settings, + link_settings->hw_lane_settings); + + memmove(link->cur_lane_setting, + link_settings->hw_lane_settings, + sizeof(link->cur_lane_setting)); +} + +void dp_set_hw_test_pattern( + struct dc_link *link, + const struct link_resource *link_res, + enum dp_test_pattern test_pattern, + uint8_t *custom_pattern, + uint32_t custom_pattern_size) +{ + const struct link_hwss *link_hwss = get_link_hwss(link, link_res); + struct encoder_set_dp_phy_pattern_param pattern_param = {0}; + + pattern_param.dp_phy_pattern = test_pattern; + pattern_param.custom_pattern = custom_pattern; + pattern_param.custom_pattern_size = custom_pattern_size; + pattern_param.dp_panel_mode = dp_get_panel_mode(link); + + if (link_hwss->ext.set_dp_link_test_pattern) + link_hwss->ext.set_dp_link_test_pattern(link, link_res, &pattern_param); +} + +void dp_retrain_link_dp_test(struct dc_link *link, + struct dc_link_settings *link_setting, + bool skip_video_pattern) +{ + struct pipe_ctx *pipes = + &link->dc->current_state->res_ctx.pipe_ctx[0]; + unsigned int i; + + + for (i = 0; i < MAX_PIPES; i++) { + if (pipes[i].stream != NULL && + !pipes[i].top_pipe && !pipes[i].prev_odm_pipe && + pipes[i].stream->link != NULL && + pipes[i].stream_res.stream_enc != NULL && + pipes[i].stream->link == link) { + udelay(100); + + pipes[i].stream_res.stream_enc->funcs->dp_blank(link, + pipes[i].stream_res.stream_enc); + + /* disable any test pattern that might be active */ + dp_set_hw_test_pattern(link, &pipes[i].link_res, + DP_TEST_PATTERN_VIDEO_MODE, NULL, 0); + + dp_receiver_power_ctrl(link, false); + + link->dc->hwss.disable_stream(&pipes[i]); + if ((&pipes[i])->stream_res.audio && !link->dc->debug.az_endpoint_mute_only) + (&pipes[i])->stream_res.audio->funcs->az_disable((&pipes[i])->stream_res.audio); + + if (link->link_enc) + link->link_enc->funcs->disable_output( + link->link_enc, + SIGNAL_TYPE_DISPLAY_PORT); + + /* Clear current link setting. */ + memset(&link->cur_link_settings, 0, + sizeof(link->cur_link_settings)); + + perform_link_training_with_retries( + link_setting, + skip_video_pattern, + LINK_TRAINING_ATTEMPTS, + &pipes[i], + SIGNAL_TYPE_DISPLAY_PORT, + false); + + link->dc->hwss.enable_stream(&pipes[i]); + + link->dc->hwss.unblank_stream(&pipes[i], + link_setting); + + if (pipes[i].stream_res.audio) { + /* notify audio driver for + * audio modes of monitor */ + pipes[i].stream_res.audio->funcs->az_enable( + pipes[i].stream_res.audio); + + /* un-mute audio */ + /* TODO: audio should be per stream rather than + * per link */ + pipes[i].stream_res.stream_enc->funcs-> + audio_mute_control( + pipes[i].stream_res.stream_enc, false); + } + } + } +} + +#undef DC_LOGGER +#define DC_LOGGER \ + dsc->ctx->logger +static void dsc_optc_config_log(struct display_stream_compressor *dsc, + struct dsc_optc_config *config) +{ + uint32_t precision = 1 << 28; + uint32_t bytes_per_pixel_int = config->bytes_per_pixel / precision; + uint32_t bytes_per_pixel_mod = config->bytes_per_pixel % precision; + uint64_t ll_bytes_per_pix_fraq = bytes_per_pixel_mod; + + /* 7 fractional digits decimal precision for bytes per pixel is enough because DSC + * bits per pixel precision is 1/16th of a pixel, which means bytes per pixel precision is + * 1/16/8 = 1/128 of a byte, or 0.0078125 decimal + */ + ll_bytes_per_pix_fraq *= 10000000; + ll_bytes_per_pix_fraq /= precision; + + DC_LOG_DSC("\tbytes_per_pixel 0x%08x (%d.%07d)", + config->bytes_per_pixel, bytes_per_pixel_int, (uint32_t)ll_bytes_per_pix_fraq); + DC_LOG_DSC("\tis_pixel_format_444 %d", config->is_pixel_format_444); + DC_LOG_DSC("\tslice_width %d", config->slice_width); +} + +bool dp_set_dsc_on_rx(struct pipe_ctx *pipe_ctx, bool enable) +{ + struct dc *dc = pipe_ctx->stream->ctx->dc; + struct dc_stream_state *stream = pipe_ctx->stream; + bool result = false; + + if (dc_is_virtual_signal(stream->signal) || IS_FPGA_MAXIMUS_DC(dc->ctx->dce_environment)) + result = true; + else + result = dm_helpers_dp_write_dsc_enable(dc->ctx, stream, enable); + return result; +} + +/* The stream with these settings can be sent (unblanked) only after DSC was enabled on RX first, + * i.e. after dp_enable_dsc_on_rx() had been called + */ +void dp_set_dsc_on_stream(struct pipe_ctx *pipe_ctx, bool enable) +{ + struct display_stream_compressor *dsc = pipe_ctx->stream_res.dsc; + struct dc *dc = pipe_ctx->stream->ctx->dc; + struct dc_stream_state *stream = pipe_ctx->stream; + struct pipe_ctx *odm_pipe; + int opp_cnt = 1; + + for (odm_pipe = pipe_ctx->next_odm_pipe; odm_pipe; odm_pipe = odm_pipe->next_odm_pipe) + opp_cnt++; + + if (enable) { + struct dsc_config dsc_cfg; + struct dsc_optc_config dsc_optc_cfg; + enum optc_dsc_mode optc_dsc_mode; + + /* Enable DSC hw block */ + dsc_cfg.pic_width = (stream->timing.h_addressable + stream->timing.h_border_left + stream->timing.h_border_right) / opp_cnt; + dsc_cfg.pic_height = stream->timing.v_addressable + stream->timing.v_border_top + stream->timing.v_border_bottom; + dsc_cfg.pixel_encoding = stream->timing.pixel_encoding; + dsc_cfg.color_depth = stream->timing.display_color_depth; + dsc_cfg.is_odm = pipe_ctx->next_odm_pipe ? true : false; + dsc_cfg.dc_dsc_cfg = stream->timing.dsc_cfg; + ASSERT(dsc_cfg.dc_dsc_cfg.num_slices_h % opp_cnt == 0); + dsc_cfg.dc_dsc_cfg.num_slices_h /= opp_cnt; + + dsc->funcs->dsc_set_config(dsc, &dsc_cfg, &dsc_optc_cfg); + dsc->funcs->dsc_enable(dsc, pipe_ctx->stream_res.opp->inst); + for (odm_pipe = pipe_ctx->next_odm_pipe; odm_pipe; odm_pipe = odm_pipe->next_odm_pipe) { + struct display_stream_compressor *odm_dsc = odm_pipe->stream_res.dsc; + + odm_dsc->funcs->dsc_set_config(odm_dsc, &dsc_cfg, &dsc_optc_cfg); + odm_dsc->funcs->dsc_enable(odm_dsc, odm_pipe->stream_res.opp->inst); + } + dsc_cfg.dc_dsc_cfg.num_slices_h *= opp_cnt; + dsc_cfg.pic_width *= opp_cnt; + + optc_dsc_mode = dsc_optc_cfg.is_pixel_format_444 ? OPTC_DSC_ENABLED_444 : OPTC_DSC_ENABLED_NATIVE_SUBSAMPLED; + + /* Enable DSC in encoder */ + if (dc_is_dp_signal(stream->signal) && !IS_FPGA_MAXIMUS_DC(dc->ctx->dce_environment) + && !is_dp_128b_132b_signal(pipe_ctx)) { + DC_LOG_DSC("Setting stream encoder DSC config for engine %d:", (int)pipe_ctx->stream_res.stream_enc->id); + dsc_optc_config_log(dsc, &dsc_optc_cfg); + pipe_ctx->stream_res.stream_enc->funcs->dp_set_dsc_config(pipe_ctx->stream_res.stream_enc, + optc_dsc_mode, + dsc_optc_cfg.bytes_per_pixel, + dsc_optc_cfg.slice_width); + + /* PPS SDP is set elsewhere because it has to be done after DIG FE is connected to DIG BE */ + } + + /* Enable DSC in OPTC */ + DC_LOG_DSC("Setting optc DSC config for tg instance %d:", pipe_ctx->stream_res.tg->inst); + dsc_optc_config_log(dsc, &dsc_optc_cfg); + pipe_ctx->stream_res.tg->funcs->set_dsc_config(pipe_ctx->stream_res.tg, + optc_dsc_mode, + dsc_optc_cfg.bytes_per_pixel, + dsc_optc_cfg.slice_width); + } else { + /* disable DSC in OPTC */ + pipe_ctx->stream_res.tg->funcs->set_dsc_config( + pipe_ctx->stream_res.tg, + OPTC_DSC_DISABLED, 0, 0); + + /* disable DSC in stream encoder */ + if (dc_is_dp_signal(stream->signal)) { + if (is_dp_128b_132b_signal(pipe_ctx)) + pipe_ctx->stream_res.hpo_dp_stream_enc->funcs->dp_set_dsc_pps_info_packet( + pipe_ctx->stream_res.hpo_dp_stream_enc, + false, + NULL, + true); + else if (!IS_FPGA_MAXIMUS_DC(dc->ctx->dce_environment)) { + pipe_ctx->stream_res.stream_enc->funcs->dp_set_dsc_config( + pipe_ctx->stream_res.stream_enc, + OPTC_DSC_DISABLED, 0, 0); + pipe_ctx->stream_res.stream_enc->funcs->dp_set_dsc_pps_info_packet( + pipe_ctx->stream_res.stream_enc, false, NULL, true); + } + } + + /* disable DSC block */ + pipe_ctx->stream_res.dsc->funcs->dsc_disable(pipe_ctx->stream_res.dsc); + for (odm_pipe = pipe_ctx->next_odm_pipe; odm_pipe; odm_pipe = odm_pipe->next_odm_pipe) + odm_pipe->stream_res.dsc->funcs->dsc_disable(odm_pipe->stream_res.dsc); + } +} + +bool dp_set_dsc_enable(struct pipe_ctx *pipe_ctx, bool enable) +{ + struct display_stream_compressor *dsc = pipe_ctx->stream_res.dsc; + bool result = false; + + if (!pipe_ctx->stream->timing.flags.DSC) + goto out; + if (!dsc) + goto out; + + if (enable) { + { + dp_set_dsc_on_stream(pipe_ctx, true); + result = true; + } + } else { + dp_set_dsc_on_rx(pipe_ctx, false); + dp_set_dsc_on_stream(pipe_ctx, false); + result = true; + } +out: + return result; +} + +/* + * For dynamic bpp change case, dsc is programmed with MASTER_UPDATE_LOCK enabled; + * hence PPS info packet update need to use frame update instead of immediate update. + * Added parameter immediate_update for this purpose. + * The decision to use frame update is hard-coded in function dp_update_dsc_config(), + * which is the only place where a "false" would be passed in for param immediate_update. + * + * immediate_update is only applicable when DSC is enabled. + */ +bool dp_set_dsc_pps_sdp(struct pipe_ctx *pipe_ctx, bool enable, bool immediate_update) +{ + struct display_stream_compressor *dsc = pipe_ctx->stream_res.dsc; + struct dc_stream_state *stream = pipe_ctx->stream; + + if (!pipe_ctx->stream->timing.flags.DSC || !dsc) + return false; + + if (enable) { + struct dsc_config dsc_cfg; + uint8_t dsc_packed_pps[128]; + + memset(&dsc_cfg, 0, sizeof(dsc_cfg)); + memset(dsc_packed_pps, 0, 128); + + /* Enable DSC hw block */ + dsc_cfg.pic_width = stream->timing.h_addressable + stream->timing.h_border_left + stream->timing.h_border_right; + dsc_cfg.pic_height = stream->timing.v_addressable + stream->timing.v_border_top + stream->timing.v_border_bottom; + dsc_cfg.pixel_encoding = stream->timing.pixel_encoding; + dsc_cfg.color_depth = stream->timing.display_color_depth; + dsc_cfg.is_odm = pipe_ctx->next_odm_pipe ? true : false; + dsc_cfg.dc_dsc_cfg = stream->timing.dsc_cfg; + + DC_LOG_DSC(" "); + dsc->funcs->dsc_get_packed_pps(dsc, &dsc_cfg, &dsc_packed_pps[0]); + memcpy(&stream->dsc_packed_pps[0], &dsc_packed_pps[0], sizeof(stream->dsc_packed_pps)); + if (dc_is_dp_signal(stream->signal)) { + DC_LOG_DSC("Setting stream encoder DSC PPS SDP for engine %d\n", (int)pipe_ctx->stream_res.stream_enc->id); + if (is_dp_128b_132b_signal(pipe_ctx)) + pipe_ctx->stream_res.hpo_dp_stream_enc->funcs->dp_set_dsc_pps_info_packet( + pipe_ctx->stream_res.hpo_dp_stream_enc, + true, + &dsc_packed_pps[0], + immediate_update); + else + pipe_ctx->stream_res.stream_enc->funcs->dp_set_dsc_pps_info_packet( + pipe_ctx->stream_res.stream_enc, + true, + &dsc_packed_pps[0], + immediate_update); + } + } else { + /* disable DSC PPS in stream encoder */ + memset(&stream->dsc_packed_pps[0], 0, sizeof(stream->dsc_packed_pps)); + if (dc_is_dp_signal(stream->signal)) { + if (is_dp_128b_132b_signal(pipe_ctx)) + pipe_ctx->stream_res.hpo_dp_stream_enc->funcs->dp_set_dsc_pps_info_packet( + pipe_ctx->stream_res.hpo_dp_stream_enc, + false, + NULL, + true); + else + pipe_ctx->stream_res.stream_enc->funcs->dp_set_dsc_pps_info_packet( + pipe_ctx->stream_res.stream_enc, false, NULL, true); + } + } + + return true; +} + + +bool dp_update_dsc_config(struct pipe_ctx *pipe_ctx) +{ + struct display_stream_compressor *dsc = pipe_ctx->stream_res.dsc; + + if (!pipe_ctx->stream->timing.flags.DSC) + return false; + if (!dsc) + return false; + + dp_set_dsc_on_stream(pipe_ctx, true); + dp_set_dsc_pps_sdp(pipe_ctx, true, false); + return true; +} + +#undef DC_LOGGER +#define DC_LOGGER \ + link->ctx->logger |