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author | George Shen <george.shen@amd.com> | 2023-12-01 06:25:09 -0700 |
---|---|---|
committer | Alex Deucher <alexander.deucher@amd.com> | 2023-12-06 15:22:33 -0500 |
commit | d24e50e1005fd584e0fea138aa153349e13b4d94 (patch) | |
tree | 841f8301e136f1ad7702fc2d91bd442826dff672 /drivers/gpu/drm/amd/display | |
parent | 2cbed167d2698f10a67f47f14aaac7d498f6dfb7 (diff) | |
download | linux-d24e50e1005fd584e0fea138aa153349e13b4d94.tar.gz linux-d24e50e1005fd584e0fea138aa153349e13b4d94.tar.bz2 linux-d24e50e1005fd584e0fea138aa153349e13b4d94.zip |
drm/amd/display: Skip DPIA-specific DP LL automation flag for non-DPIA links
[Why]
The is_automated flag logic only applies to USB4 DPIA links during DP LL
compliance test automation. The flag should not be set for non-DPIA
cases.
[How]
Add check for DPIA link endpoint type before setting the flag. Also,
rename is_automated to skip_fallback_on_link_loss for clarity.
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: Meenakshikumar Somasundaram <meenakshikumar.somasundaram@amd.com>
Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Acked-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: George Shen <george.shen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display')
3 files changed, 13 insertions, 5 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h index e8c1599ab18a..6ee4db8c0548 100644 --- a/drivers/gpu/drm/amd/display/dc/dc.h +++ b/drivers/gpu/drm/amd/display/dc/dc.h @@ -1541,7 +1541,13 @@ struct dc_link { bool is_dig_mapping_flexible; bool hpd_status; /* HPD status of link without physical HPD pin. */ bool is_hpd_pending; /* Indicates a new received hpd */ - bool is_automated; /* Indicates automated testing */ + + /* USB4 DPIA links skip verifying link cap, instead performing the fallback method + * for every link training. This is incompatible with DP LL compliance automation, + * which expects the same link settings to be used every retry on a link loss. + * This flag is used to skip the fallback when link loss occurs during automation. + */ + bool skip_fallback_on_link_loss; bool edp_sink_present; diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c index 0c00e94e90b1..ae271c830c9a 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c @@ -265,7 +265,7 @@ void dp_handle_link_loss(struct dc_link *link) for (i = count - 1; i >= 0; i--) { // Always use max settings here for DP 1.4a LL Compliance CTS - if (link->is_automated) { + if (link->skip_fallback_on_link_loss) { pipes[i]->link_config.dp_link_settings.lane_count = link->verified_link_cap.lane_count; pipes[i]->link_config.dp_link_settings.link_rate = @@ -404,7 +404,9 @@ bool dp_handle_hpd_rx_irq(struct dc_link *link, if (hpd_irq_dpcd_data.bytes.device_service_irq.bits.AUTOMATED_TEST) { // Workaround for DP 1.4a LL Compliance CTS as USB4 has to share encoders unlike DP and USBC - link->is_automated = true; + if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) + link->skip_fallback_on_link_loss = true; + device_service_clear.bits.AUTOMATED_TEST = 1; core_link_write_dpcd( link, diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_dpia.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_dpia.c index 4f4e899e5c46..e8dda44b23cb 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_dpia.c +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_dpia.c @@ -811,7 +811,7 @@ static enum link_training_result dpia_training_eq_transparent( /* Take into consideration corner case for DP 1.4a LL Compliance CTS as USB4 * has to share encoders unlike DP and USBC */ - if (dp_is_interlane_aligned(dpcd_lane_status_updated) || (link->is_automated && retries_eq)) { + if (dp_is_interlane_aligned(dpcd_lane_status_updated) || (link->skip_fallback_on_link_loss && retries_eq)) { result = LINK_TRAINING_SUCCESS; break; } @@ -1037,7 +1037,7 @@ enum link_training_result dpia_perform_link_training( */ if (result == LINK_TRAINING_SUCCESS) { fsleep(5000); - if (!link->is_automated) + if (!link->skip_fallback_on_link_loss) result = dp_check_link_loss_status(link, <_settings); } else if (result == LINK_TRAINING_ABORT) dpia_training_abort(link, <_settings, repeater_id); |