On August 6, 2024 2:19:46 AM GMT+07:00, Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx> wrote:
>
>
>On 8/2/2024 12:47 PM, Dmitry Baryshkov wrote:
>> During suspend/resume process all connectors are explicitly disabled and
>> then reenabled. However resume fails because of the connector_status check:
>>
>> [ 1185.831970] [dpu error]connector not connected 3
>>
>> It doesn't make sense to check for the Writeback connected status (and
>> other drivers don't perform such check), so drop the check.
>>
>> Fixes: 71174f362d67 ("drm/msm/dpu: move writeback's atomic_check to dpu_writeback.c")
>> Cc: stable@xxxxxxxxxxxxxxx
>> Reported-by: Leonard Lausen <leonard@xxxxxxxxx>
>> Closes: https://gitlab.freedesktop.org/drm/msm/-/issues/57
>> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
>> ---
>> drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c | 3 ---
>> 1 file changed, 3 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c
>> index 16f144cbc0c9..8ff496082902 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c
>> @@ -42,9 +42,6 @@ static int dpu_wb_conn_atomic_check(struct drm_connector *connector,
>> if (!conn_state || !conn_state->connector) {
>> DPU_ERROR("invalid connector state\n");
>> return -EINVAL;
>> - } else if (conn_state->connector->status != connector_status_connected) {
>> - DPU_ERROR("connector not connected %d\n", conn_state->connector->status);
>> - return -EINVAL;
>> }
>
>For this issue, do we hit the connector->force = DRM_FORCE_OFF path?
It was hit during the suspend/resume, so yes, it is a forced off, but by the different means.
>
>Because otherwise, writeback does not implement .detect() callback today so its always connected.
It is undefined/unkown (3), not connected (1)
>
>But if that was the case how come this error is only for writeback. Even DP has the same connected check in atomic_check()
>
>Change seems fine with me because ideally this seems like a no-op to me because writeback connector is assumed to be always connected but the issue is missing some details here.
>
>> crtc = conn_state->crtc;
>>
--
With best wishes
Dmitry
