summaryrefslogtreecommitdiff
path: root/drivers
diff options
context:
space:
mode:
authorFangzhi Zuo <jerry.zuo@amd.com>2023-05-10 16:43:30 -0400
committerAlex Deucher <alexander.deucher@amd.com>2023-05-24 16:37:00 -0400
commit482e6ad9adde69d9da08864b4ccf4dfd53edb2f0 (patch)
tree1f64ee9f66bb8022a08e33dacfe15f00dfcbb94e /drivers
parent137f9cee113df91107cf91c130d5c414c4b191f0 (diff)
downloadlwn-482e6ad9adde69d9da08864b4ccf4dfd53edb2f0.tar.gz
lwn-482e6ad9adde69d9da08864b4ccf4dfd53edb2f0.zip
drm/amd/display: Have Payload Properly Created After Resume
At drm suspend sequence, MST dc_sink is removed. When commit cached MST stream back in drm resume sequence, the MST stream payload is not properly created and added into the payload table. After resume, topology change is reprobed by removing existing streams first. That leads to no payload is found in the existing payload table as below error "[drm] ERROR No payload for [MST PORT:] found in mst state" 1. In encoder .atomic_check routine, remove check existance of dc_sink 2. Bypass MST by checking existence of MST root port. dc_link_type cannot differentiate MST port before topology is rediscovered. Reviewed-by: Wayne Lin <wayne.lin@amd.com> Acked-by: Tom Chung <chiahsuan.chung@amd.com> Signed-off-by: Fangzhi Zuo <jerry.zuo@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 26b5cbc97046..d5cec03eaa8d 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2857,7 +2857,7 @@ static int dm_resume(void *handle)
* this is the case when traversing through already created
* MST connectors, should be skipped
*/
- if (aconnector->dc_link->type == dc_connection_mst_branch)
+ if (aconnector && aconnector->mst_root)
continue;
mutex_lock(&aconnector->hpd_lock);
@@ -6742,7 +6742,7 @@ static int dm_encoder_helper_atomic_check(struct drm_encoder *encoder,
int clock, bpp = 0;
bool is_y420 = false;
- if (!aconnector->mst_output_port || !aconnector->dc_sink)
+ if (!aconnector->mst_output_port)
return 0;
mst_port = aconnector->mst_output_port;