diff options
6 files changed, 27 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c b/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c index c17732fba039..a4bef4364afd 100644 --- a/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c +++ b/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c @@ -2321,6 +2321,8 @@ static enum bp_result get_integrated_info_v2_2( info->ext_disp_conn_info.checksum = info_v2_2->extdispconninfo.checksum; + info->ext_disp_conn_info.fixdpvoltageswing = + info_v2_2->extdispconninfo.fixdpvoltageswing; info->edp1_info.edp_backlight_pwm_hz = le16_to_cpu(info_v2_2->edp1_info.edp_backlight_pwm_hz); diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c index 96d2001ede61..a1fa50ddf43e 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -1660,6 +1660,14 @@ static bool dc_link_construct_legacy(struct dc_link *link, DC_LOG_DC("BIOS object table - ddi_channel_mapping: 0x%04X", link->ddi_channel_mapping.raw); DC_LOG_DC("BIOS object table - chip_caps: %d", link->chip_caps); } + + if (link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) { + link->bios_forced_drive_settings.VOLTAGE_SWING = + (info->ext_disp_conn_info.fixdpvoltageswing & 0x3); + link->bios_forced_drive_settings.PRE_EMPHASIS = + ((info->ext_disp_conn_info.fixdpvoltageswing >> 2) & 0x3); + } + break; } } 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 e514506b1997..3313f2af139f 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 @@ -1661,7 +1661,13 @@ static void override_training_settings( 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->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->voltage_swing != NULL ? diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h index 8902d642e719..517950674729 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_link.h +++ b/drivers/gpu/drm/amd/display/dc/dc_link.h @@ -178,6 +178,9 @@ struct dc_link { struct psr_settings psr_settings; + /* Drive settings read from integrated info table */ + struct dc_lane_settings bios_forced_drive_settings; + /* MST record stream using this link */ struct link_flags { bool dp_keep_receiver_powered; diff --git a/drivers/gpu/drm/amd/display/include/grph_object_ctrl_defs.h b/drivers/gpu/drm/amd/display/include/grph_object_ctrl_defs.h index 792652236c61..dd974c428d23 100644 --- a/drivers/gpu/drm/amd/display/include/grph_object_ctrl_defs.h +++ b/drivers/gpu/drm/amd/display/include/grph_object_ctrl_defs.h @@ -328,6 +328,7 @@ struct integrated_info { uint8_t gu_id[NUMBER_OF_UCHAR_FOR_GUID]; uint8_t checksum; + uint8_t fixdpvoltageswing; } ext_disp_conn_info; /* exiting long long time */ struct available_s_clk_list { diff --git a/drivers/gpu/drm/amd/display/include/link_service_types.h b/drivers/gpu/drm/amd/display/include/link_service_types.h index 9ffea7b40545..9a16fc855254 100644 --- a/drivers/gpu/drm/amd/display/include/link_service_types.h +++ b/drivers/gpu/drm/amd/display/include/link_service_types.h @@ -117,6 +117,12 @@ struct link_training_settings { bool enhanced_framing; bool allow_invalid_msa_timing_param; enum lttpr_mode lttpr_mode; + + /* disallow different lanes to have different lane settings */ + bool disallow_per_lane_settings; + /* dpcd lane settings will always use the same hw lane settings + * even if it doesn't match requested lane adjust */ + bool always_match_dpcd_with_hw_lane_settings; }; /*TODO: Move this enum test harness*/ |