From: Michael Strauss michael.strauss@amd.com
[ Upstream commit 9fa8cc0c444562fa19e20ca20f1c70e15b9d8c13 ]
[WHY] 32ms delay was added to resolve issue with a specific sink, however this same delay also introduces erroneous link training failures with certain sink devices.
[HOW] Only apply the 32ms delay for offending devices instead of globally.
Tested-by: Daniel Wheeler daniel.wheeler@amd.com Reviewed-by: Jun Lei Jun.Lei@amd.com Acked-by: Rodrigo Siqueira Rodrigo.Siqueira@amd.com Signed-off-by: Michael Strauss michael.strauss@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Stable-dep-of: 5a096b73c8fe ("drm/amd/display: Keep disable aux-i delay as 0") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/amd/display/dc/dc.h | 1 - drivers/gpu/drm/amd/display/dc/dc_types.h | 1 + .../link_dp_training_fixed_vs_pe_retimer.c | 17 +++++++++++------ 3 files changed, 12 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h index 4d93ca9c627b0..07d86b961c798 100644 --- a/drivers/gpu/drm/amd/display/dc/dc.h +++ b/drivers/gpu/drm/amd/display/dc/dc.h @@ -855,7 +855,6 @@ struct dc_debug_options { bool force_usr_allow; /* uses value at boot and disables switch */ bool disable_dtb_ref_clk_switch; - uint32_t fixed_vs_aux_delay_config_wa; bool extended_blank_optimization; union aux_wake_wa_options aux_wake_wa; uint32_t mst_start_top_delay; diff --git a/drivers/gpu/drm/amd/display/dc/dc_types.h b/drivers/gpu/drm/amd/display/dc/dc_types.h index 45ab48fe5d004..139a77acd5d02 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_types.h +++ b/drivers/gpu/drm/amd/display/dc/dc_types.h @@ -196,6 +196,7 @@ struct dc_panel_patch { unsigned int disable_fams; unsigned int skip_avmute; unsigned int mst_start_top_delay; + unsigned int delay_disable_aux_intercept_ms; };
struct dc_edid_caps { diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_fixed_vs_pe_retimer.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_fixed_vs_pe_retimer.c index 5731c4b61f9f0..fb6c938c6dab1 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_fixed_vs_pe_retimer.c +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_fixed_vs_pe_retimer.c @@ -233,7 +233,8 @@ enum link_training_result dp_perform_fixed_vs_pe_training_sequence_legacy( 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; + uint32_t pre_disable_intercept_delay_ms = + link->local_sink->edid_caps.panel_patch.delay_disable_aux_intercept_ms; 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; @@ -259,7 +260,7 @@ enum link_training_result dp_perform_fixed_vs_pe_training_sequence_legacy(
/* 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; + pre_disable_intercept_delay_ms = pre_disable_intercept_delay_ms * 2; }
/* Vendor specific: Reset lane settings */ @@ -380,7 +381,8 @@ enum link_training_result dp_perform_fixed_vs_pe_training_sequence_legacy( 0); /* Vendor specific: Disable intercept */ for (i = 0; i < max_vendor_dpcd_retries; i++) { - msleep(pre_disable_intercept_delay_ms); + if (pre_disable_intercept_delay_ms != 0) + msleep(pre_disable_intercept_delay_ms); dpcd_status = core_link_write_dpcd( link, vendor_lttpr_write_address, @@ -591,9 +593,11 @@ enum link_training_result dp_perform_fixed_vs_pe_training_sequence( const uint8_t vendor_lttpr_write_data_adicora_eq1[4] = {0x1, 0x55, 0x63, 0x2E}; const uint8_t vendor_lttpr_write_data_adicora_eq2[4] = {0x1, 0x55, 0x63, 0x01}; const uint8_t vendor_lttpr_write_data_adicora_eq3[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 pre_disable_intercept_delay_ms = + link->local_sink->edid_caps.panel_patch.delay_disable_aux_intercept_ms; +
uint32_t vendor_lttpr_write_address = 0xF004F; enum link_training_result status = LINK_TRAINING_SUCCESS; @@ -618,7 +622,7 @@ enum link_training_result dp_perform_fixed_vs_pe_training_sequence(
/* 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; + pre_disable_intercept_delay_ms = pre_disable_intercept_delay_ms * 2; }
/* Vendor specific: Reset lane settings */ @@ -739,7 +743,8 @@ enum link_training_result dp_perform_fixed_vs_pe_training_sequence( 0); /* Vendor specific: Disable intercept */ for (i = 0; i < max_vendor_dpcd_retries; i++) { - msleep(pre_disable_intercept_delay_ms); + if (pre_disable_intercept_delay_ms != 0) + msleep(pre_disable_intercept_delay_ms); dpcd_status = core_link_write_dpcd( link, vendor_lttpr_write_address,