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 | 67 |
1 files changed, 54 insertions, 13 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 3b5053570229..7857cb42b3e6 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 @@ -1378,8 +1378,8 @@ static uint32_t bandwidth_in_kbps_from_timing( { uint32_t bits_per_channel = 0; uint32_t kbps; - switch (timing->display_color_depth) { + switch (timing->display_color_depth) { case COLOR_DEPTH_666: bits_per_channel = 6; break; @@ -1401,14 +1401,20 @@ static uint32_t bandwidth_in_kbps_from_timing( default: break; } + ASSERT(bits_per_channel != 0); kbps = timing->pix_clk_khz; kbps *= bits_per_channel; - if (timing->flags.Y_ONLY != 1) + if (timing->flags.Y_ONLY != 1) { /*Only YOnly make reduce bandwidth by 1/3 compares to RGB*/ kbps *= 3; + if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR420) + kbps /= 2; + else if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR422) + kbps = kbps * 2 / 3; + } return kbps; @@ -1624,17 +1630,42 @@ static enum dc_status read_hpd_rx_irq_data( struct dc_link *link, union hpd_irq_data *irq_data) { + static enum dc_status retval; + /* The HW reads 16 bytes from 200h on HPD, * but if we get an AUX_DEFER, the HW cannot retry * and this causes the CTS tests 4.3.2.1 - 3.2.4 to * fail, so we now explicitly read 6 bytes which is * the req from the above mentioned test cases. + * + * For DP 1.4 we need to read those from 2002h range. */ - return core_link_read_dpcd( - link, - DP_SINK_COUNT, - irq_data->raw, - sizeof(union hpd_irq_data)); + if (link->dpcd_caps.dpcd_rev.raw < DPCD_REV_14) + retval = core_link_read_dpcd( + link, + DP_SINK_COUNT, + irq_data->raw, + sizeof(union hpd_irq_data)); + else { + /* Read 2 bytes at this location,... */ + retval = core_link_read_dpcd( + link, + DP_SINK_COUNT_ESI, + irq_data->raw, + 2); + + if (retval != DC_OK) + return retval; + + /* ... then read remaining 4 at the other location */ + retval = core_link_read_dpcd( + link, + DP_LANE0_1_STATUS_ESI, + &irq_data->raw[2], + 4); + } + + return retval; } static bool allow_hpd_rx_irq(const struct dc_link *link) @@ -2272,12 +2303,14 @@ static void dp_wa_power_up_0010FA(struct dc_link *link, uint8_t *dpcd_data, static bool retrieve_link_cap(struct dc_link *link) { - uint8_t dpcd_data[DP_TRAINING_AUX_RD_INTERVAL - DP_DPCD_REV + 1]; + uint8_t dpcd_data[DP_ADAPTER_CAP - DP_DPCD_REV + 1]; union down_stream_port_count down_strm_port_count; union edp_configuration_cap edp_config_cap; union dp_downstream_port_present ds_port = { 0 }; enum dc_status status = DC_ERROR_UNEXPECTED; + uint32_t read_dpcd_retry_cnt = 3; + int i; memset(dpcd_data, '\0', sizeof(dpcd_data)); memset(&down_strm_port_count, @@ -2285,11 +2318,15 @@ static bool retrieve_link_cap(struct dc_link *link) memset(&edp_config_cap, '\0', sizeof(union edp_configuration_cap)); - status = core_link_read_dpcd( - link, - DP_DPCD_REV, - dpcd_data, - sizeof(dpcd_data)); + for (i = 0; i < read_dpcd_retry_cnt; i++) { + status = core_link_read_dpcd( + link, + DP_DPCD_REV, + dpcd_data, + sizeof(dpcd_data)); + if (status == DC_OK) + break; + } if (status != DC_OK) { dm_error("%s: Read dpcd data failed.\n", __func__); @@ -2376,6 +2413,10 @@ bool detect_dp_sink_caps(struct dc_link *link) void detect_edp_sink_caps(struct dc_link *link) { retrieve_link_cap(link); + + if (link->reported_link_cap.link_rate == LINK_RATE_UNKNOWN) + link->reported_link_cap.link_rate = LINK_RATE_HIGH2; + link->verified_link_cap = link->reported_link_cap; } |