From: Stylon Wang stylon.wang@amd.com

[Why] Since introduction of patch "Query DPIA HPD status.", link detection at boot could be accessing DPIA AUX, which will not succeed until DMUB outbox messaging is enabled and results in below dmesg logs:

[ 160.840227] [drm:amdgpu_dm_process_dmub_aux_transfer_sync [amdgpu]] *ERROR* wait_for_completion_timeout timeout!

[How] Enable DMUB outbox messaging before link detection at boot time.

Reviewed-by: Wayne Lin Wayne.Lin@amd.com Acked-by: Tom Chung chiahsuan.chung@amd.com Signed-off-by: Stylon Wang stylon.wang@amd.com Cc: stable@vger.kernel.org #6.0.x --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 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 66eb16fbe09f..4d90c5415d5c 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -1633,12 +1633,6 @@ static int amdgpu_dm_init(struct amdgpu_device *adev) } }

- if (amdgpu_dm_initialize_drm_device(adev)) { - DRM_ERROR( - "amdgpu: failed to initialize sw for display support.\n"); - goto error; - } - /* Enable outbox notification only after IRQ handlers are registered and DMUB is alive. * It is expected that DMUB will resend any pending notifications at this point, for * example HPD from DPIA. @@ -1646,6 +1640,12 @@ static int amdgpu_dm_init(struct amdgpu_device *adev) if (dc_is_dmub_outbox_supported(adev->dm.dc)) dc_enable_dmub_outbox(adev->dm.dc);

+ if (amdgpu_dm_initialize_drm_device(adev)) { + DRM_ERROR( + "amdgpu: failed to initialize sw for display support.\n"); + goto error; + } + /* create fake encoders for MST */ dm_dp_create_fake_mst_encoders(adev);