Commit ec314c46 authored by Wayne Lin's avatar Wayne Lin Committed by Alex Deucher
Browse files

drm/amd/display: Retry AUX write when fail occurs 



[Why]
In dm_dp_aux_transfer() now, we forget to handle AUX_WR fail cases. We
suppose every write wil get done successfully and hence some AUX
commands might not sent out indeed.

[How]
Check if AUX_WR success. If not, retry it.

Signed-off-by: default avatarWayne Lin <Wayne.Lin@amd.com>
Reviewed-by: default avatarHersen Wu <hersenxs.wu@amd.com>
Acked-by: default avatarRodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent cf851f3f

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c

+1 −1
Original line number Diff line number Diff line
@@ -67,7 +67,7 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux, 
	result = dc_link_aux_transfer_raw(TO_DM_AUX(aux)->ddc_service, &payload,

				      &operation_result);



	if (payload.write)

	if (payload.write && result >= 0)

		result = msg->size;



	if (result < 0)