diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c | 135 |
1 files changed, 106 insertions, 29 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c b/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c index e60f760585e4..87d682d25278 100644 --- a/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c +++ b/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c @@ -22,30 +22,16 @@ * Author: AMD */ -#ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT #include "dc_hw_types.h" #include "dsc.h" #include <drm/drm_dp_helper.h> - -struct dc_dsc_policy { - bool use_min_slices_h; - int max_slices_h; // Maximum available if 0 - int min_sice_height; // Must not be less than 8 - int max_target_bpp; - int min_target_bpp; // Minimum target bits per pixel -}; - -const struct dc_dsc_policy dsc_policy = { - .use_min_slices_h = true, // DSC Policy: Use minimum number of slices that fits the pixel clock - .max_slices_h = 0, // DSC Policy: Use max available slices (in our case 4 for or 8, depending on the mode) - .min_sice_height = 108, // DSC Policy: Use slice height recommended by VESA DSC Spreadsheet user guide - .max_target_bpp = 16, - .min_target_bpp = 8, -}; - +#include "dc.h" /* This module's internal functions */ +/* default DSC policy target bitrate limit is 16bpp */ +static uint32_t dsc_policy_max_target_bpp_limit = 16; + static uint32_t dc_dsc_bandwidth_in_kbps_from_timing( const struct dc_crtc_timing *timing) { @@ -237,8 +223,12 @@ static void get_dsc_enc_caps( // This is a static HW query, so we can use any DSC memset(dsc_enc_caps, 0, sizeof(struct dsc_enc_caps)); - if (dsc) - dsc->funcs->dsc_get_enc_caps(dsc_enc_caps, pixel_clock_100Hz); + if (dsc) { + if (!dsc->ctx->dc->debug.disable_dsc) + dsc->funcs->dsc_get_enc_caps(dsc_enc_caps, pixel_clock_100Hz); + if (dsc->ctx->dc->debug.native422_support) + dsc_enc_caps->color_formats.bits.YCBCR_NATIVE_422 = 1; + } } /* Returns 'false' if no intersection was found for at least one capablity. @@ -578,9 +568,11 @@ static bool setup_dsc_config( bool is_dsc_possible = false; int pic_height; int slice_height; + struct dc_dsc_policy policy; memset(dsc_cfg, 0, sizeof(struct dc_dsc_config)); + dc_dsc_get_policy_for_timing(timing, &policy); pic_width = timing->h_addressable + timing->h_border_left + timing->h_border_right; pic_height = timing->v_addressable + timing->v_border_top + timing->v_border_bottom; @@ -596,7 +588,12 @@ static bool setup_dsc_config( goto done; if (target_bandwidth_kbps > 0) { - is_dsc_possible = decide_dsc_target_bpp_x16(&dsc_policy, &dsc_common_caps, target_bandwidth_kbps, timing, &target_bpp); + is_dsc_possible = decide_dsc_target_bpp_x16( + &policy, + &dsc_common_caps, + target_bandwidth_kbps, + timing, + &target_bpp); dsc_cfg->bits_per_pixel = target_bpp; } if (!is_dsc_possible) @@ -698,20 +695,20 @@ static bool setup_dsc_config( if (!is_dsc_possible) goto done; - if (dsc_policy.use_min_slices_h) { + if (policy.use_min_slices_h) { if (min_slices_h > 0) num_slices_h = min_slices_h; else if (max_slices_h > 0) { // Fall back to max slices if min slices is not working out - if (dsc_policy.max_slices_h) - num_slices_h = min(dsc_policy.max_slices_h, max_slices_h); + if (policy.max_slices_h) + num_slices_h = min(policy.max_slices_h, max_slices_h); else num_slices_h = max_slices_h; } else is_dsc_possible = false; } else { if (max_slices_h > 0) { - if (dsc_policy.max_slices_h) - num_slices_h = min(dsc_policy.max_slices_h, max_slices_h); + if (policy.max_slices_h) + num_slices_h = min(policy.max_slices_h, max_slices_h); else num_slices_h = max_slices_h; } else if (min_slices_h > 0) // Fall back to min slices if max slices is not possible @@ -733,7 +730,7 @@ static bool setup_dsc_config( // Slice height (i.e. number of slices per column): start with policy and pick the first one that height is divisible by. // For 4:2:0 make sure the slice height is divisible by 2 as well. if (min_slice_height_override == 0) - slice_height = min(dsc_policy.min_sice_height, pic_height); + slice_height = min(policy.min_slice_height, pic_height); else slice_height = min(min_slice_height_override, pic_height); @@ -764,7 +761,7 @@ done: return is_dsc_possible; } -bool dc_dsc_parse_dsc_dpcd(const uint8_t *dpcd_dsc_basic_data, const uint8_t *dpcd_dsc_ext_data, struct dsc_dec_dpcd_caps *dsc_sink_caps) +bool dc_dsc_parse_dsc_dpcd(const struct dc *dc, const uint8_t *dpcd_dsc_basic_data, const uint8_t *dpcd_dsc_ext_data, struct dsc_dec_dpcd_caps *dsc_sink_caps) { if (!dpcd_dsc_basic_data) return false; @@ -817,6 +814,23 @@ bool dc_dsc_parse_dsc_dpcd(const uint8_t *dpcd_dsc_basic_data, const uint8_t *dp if (!dsc_bpp_increment_div_from_dpcd(dpcd_dsc_basic_data[DP_DSC_BITS_PER_PIXEL_INC - DP_DSC_SUPPORT], &dsc_sink_caps->bpp_increment_div)) return false; + if (dc->debug.dsc_bpp_increment_div) { + /* dsc_bpp_increment_div should onl be 1, 2, 4, 8 or 16, but rather than rejecting invalid values, + * we'll accept all and get it into range. This also makes the above check against 0 redundant, + * but that one stresses out the override will be only used if it's not 0. + */ + if (dc->debug.dsc_bpp_increment_div >= 1) + dsc_sink_caps->bpp_increment_div = 1; + if (dc->debug.dsc_bpp_increment_div >= 2) + dsc_sink_caps->bpp_increment_div = 2; + if (dc->debug.dsc_bpp_increment_div >= 4) + dsc_sink_caps->bpp_increment_div = 4; + if (dc->debug.dsc_bpp_increment_div >= 8) + dsc_sink_caps->bpp_increment_div = 8; + if (dc->debug.dsc_bpp_increment_div >= 16) + dsc_sink_caps->bpp_increment_div = 16; + } + /* Extended caps */ if (dpcd_dsc_ext_data == NULL) { // Extended DPCD DSC data can be null, e.g. because it doesn't apply to SST dsc_sink_caps->branch_overall_throughput_0_mps = 0; @@ -903,4 +917,67 @@ bool dc_dsc_compute_config( timing, dsc_min_slice_height_override, dsc_cfg); return is_dsc_possible; } -#endif /* CONFIG_DRM_AMD_DC_DSC_SUPPORT */ + +void dc_dsc_get_policy_for_timing(const struct dc_crtc_timing *timing, struct dc_dsc_policy *policy) +{ + uint32_t bpc = 0; + + policy->min_target_bpp = 0; + policy->max_target_bpp = 0; + + /* DSC Policy: Use minimum number of slices that fits the pixel clock */ + policy->use_min_slices_h = true; + + /* DSC Policy: Use max available slices + * (in our case 4 for or 8, depending on the mode) + */ + policy->max_slices_h = 0; + + /* DSC Policy: Use slice height recommended + * by VESA DSC Spreadsheet user guide + */ + policy->min_slice_height = 108; + + /* DSC Policy: follow DP specs with an internal upper limit to 16 bpp + * for better interoperability + */ + switch (timing->display_color_depth) { + case COLOR_DEPTH_888: + bpc = 8; + break; + case COLOR_DEPTH_101010: + bpc = 10; + break; + case COLOR_DEPTH_121212: + bpc = 12; + break; + default: + return; + } + switch (timing->pixel_encoding) { + case PIXEL_ENCODING_RGB: + case PIXEL_ENCODING_YCBCR444: + case PIXEL_ENCODING_YCBCR422: /* assume no YCbCr422 native support */ + /* DP specs limits to 8 */ + policy->min_target_bpp = 8; + /* DP specs limits to 3 x bpc */ + policy->max_target_bpp = 3 * bpc; + break; + case PIXEL_ENCODING_YCBCR420: + /* DP specs limits to 6 */ + policy->min_target_bpp = 6; + /* DP specs limits to 1.5 x bpc assume bpc is an even number */ + policy->max_target_bpp = bpc * 3 / 2; + break; + default: + return; + } + /* internal upper limit, default 16 bpp */ + if (policy->max_target_bpp > dsc_policy_max_target_bpp_limit) + policy->max_target_bpp = dsc_policy_max_target_bpp_limit; +} + +void dc_dsc_policy_set_max_target_bpp_limit(uint32_t limit) +{ + dsc_policy_max_target_bpp_limit = limit; +} |