search for: drm_output_poll_period

...u/drm/drm_probe_helper.c > index 555fbe54d6e2..019881d15ce1 100644 > --- a/drivers/gpu/drm/drm_probe_helper.c > +++ b/drivers/gpu/drm/drm_probe_helper.c > @@ -653,6 +653,20 @@ static void output_poll_execute(struct work_struct > *work) > schedule_delayed_work(delayed_work, > DRM_OUTPUT_POLL_PERIOD); > } > > +/** > + * drm_kms_helper_is_poll_worker - is %current task an output poll worker? > + * > + * Determine if %current task is an output poll worker. This can be used > + * to select distinct code paths for output polling versus other contexts. > + */ For this, i...

...drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c index 6dc2dde5b672..7a6b2dc08913 100644 --- a/drivers/gpu/drm/drm_probe_helper.c +++ b/drivers/gpu/drm/drm_probe_helper.c @@ -654,6 +654,26 @@ static void output_poll_execute(struct work_struct *work) schedule_delayed_work(delayed_work, DRM_OUTPUT_POLL_PERIOD); } +/** + * drm_kms_helper_is_poll_worker - is %current task an output poll worker? + * + * Determine if %current task is an output poll worker. This can be used + * to select distinct code paths for output polling versus other contexts. + * + * One use case is to avoid a deadlock between the...

...mp;dev->pdev->dev, "begin poll\n"); drm_connector_list_iter_begin(dev, &conn_iter); drm_for_each_connector_iter(connector, &conn_iter) { @@ -651,6 +652,7 @@ static void output_poll_execute(struct work_struct *work) if (repoll) schedule_delayed_work(delayed_work, DRM_OUTPUT_POLL_PERIOD); + dev_info(&dev->pdev->dev, "end poll\n"); } /** diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c index 3e29302..f9da5bc 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drm.c +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c @@ -855,6 +855,...

...drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c index 555fbe54d6e2..019881d15ce1 100644 --- a/drivers/gpu/drm/drm_probe_helper.c +++ b/drivers/gpu/drm/drm_probe_helper.c @@ -653,6 +653,20 @@ static void output_poll_execute(struct work_struct *work) schedule_delayed_work(delayed_work, DRM_OUTPUT_POLL_PERIOD); } +/** + * drm_kms_helper_is_poll_worker - is %current task an output poll worker? + * + * Determine if %current task is an output poll worker. This can be used + * to select distinct code paths for output polling versus other contexts. + */ +bool drm_kms_helper_is_poll_worker(void) +{ + stru...

...e54d6e2..019881d15ce1 100644 > > --- a/drivers/gpu/drm/drm_probe_helper.c > > +++ b/drivers/gpu/drm/drm_probe_helper.c > > @@ -653,6 +653,20 @@ static void output_poll_execute(struct work_struct > > *work) > > schedule_delayed_work(delayed_work, > > DRM_OUTPUT_POLL_PERIOD); > > } > > > > +/** > > + * drm_kms_helper_is_poll_worker - is %current task an output poll worker? > > + * > > + * Determine if %current task is an output poll worker. This can be used > > + * to select distinct code paths for output polling versus ot...

...mp;dev->pdev->dev, "begin poll\n"); drm_connector_list_iter_begin(dev, &conn_iter); drm_for_each_connector_iter(connector, &conn_iter) { @@ -651,6 +652,7 @@ static void output_poll_execute(struct work_struct *work) if (repoll) schedule_delayed_work(delayed_work, DRM_OUTPUT_POLL_PERIOD); + dev_info(&dev->pdev->dev, "end poll\n"); } /** diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c index 3e29302..f9da5bc 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drm.c +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c @@ -855,6 +855,...

Fix a deadlock on hybrid graphics laptops that's been present since 2013: DRM drivers poll connectors in 10 sec intervals. The poll worker is stopped on ->runtime_suspend with cancel_delayed_work_sync(). However the poll worker invokes the DRM drivers' ->detect callbacks, which call pm_runtime_get_sync(). If the poll worker starts after runtime suspend has begun,