drm/amd/display: Fix TDR eDP and USB4 display light up issue

[Why]
After TDR recovery, eDP and USB4 display does not light up. Because
dmub outbox notifications are not enabled after dmub reload and link
encoder assignments for the streams are not cleared before dc state
reset.

[How]
- Dmub outbox notification is enabled after tdr recovery by issuing
  inbox command to dmub.
- Link encoders for the streams are unassigned before dc state reset.

Reviewed-by: Jimmy Kizito <Jimmy.Kizito@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Meenakshikumar Somasundaram <meenakshikumar.somasundaram@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index ce8910ad27835fcc650e59950c0fbecd99103695..663be10b292bee898b7f96c17a95453b09415552 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -4337,6 +4337,7 @@ void dc_enable_dmub_outbox(struct dc *dc)
        struct dc_context *dc_ctx = dc->ctx;
 
        dmub_enable_outbox_notification(dc_ctx->dmub_srv);
+       DC_LOG_DC("%s: dmub outbox notifications enabled\n", __func__);
 }
 
 /**

diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h
index a0af0f6afeef858fcbc74085708c608b4e2026e9..9544abf75e846eab97013154b00e8437be8a399f 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dc_link.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_link.h
@@ -344,6 +344,7 @@ enum dc_detect_reason {
        DETECT_REASON_HPDRX,
        DETECT_REASON_FALLBACK,
        DETECT_REASON_RETRAIN,
+       DETECT_REASON_TDR,
 };
 
 bool dc_link_detect(struct dc_link *dc_link, enum dc_detect_reason reason);