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[3/5] drm/nouveau: Add missing RPM get/put() when probing connectors

Message ID 20180716235936.11268-4-lyude@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Lyude Paul July 16, 2018, 11:59 p.m. UTC
While the GPU is guaranteed to be on when a hotplug has been received,
the same assertion does not hold true if a connector probe has been
started by userspace without having had received a sysfs event. So
ensure that any connector probing keeps the GPU alive for the duration
of the probe.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: Karol Herbst <karolherbst@gmail.com>
Cc: stable@vger.kernel.org
---
 drivers/gpu/drm/nouveau/dispnv50/disp.c     |  2 +-
 drivers/gpu/drm/nouveau/nouveau_connector.c | 21 +++++++++++++++++++--
 drivers/gpu/drm/nouveau/nouveau_connector.h |  3 +++
 3 files changed, 23 insertions(+), 3 deletions(-)

Comments

Karol Herbst July 17, 2018, 10:11 a.m. UTC | #1
Reviewed-by: Karol Herbst <karolherbst@gmail.com>

On Tue, Jul 17, 2018 at 1:59 AM, Lyude Paul <lyude@redhat.com> wrote:
> While the GPU is guaranteed to be on when a hotplug has been received,
> the same assertion does not hold true if a connector probe has been
> started by userspace without having had received a sysfs event. So
> ensure that any connector probing keeps the GPU alive for the duration
> of the probe.
>
> Signed-off-by: Lyude Paul <lyude@redhat.com>
> Cc: Karol Herbst <karolherbst@gmail.com>
> Cc: stable@vger.kernel.org
> ---
>  drivers/gpu/drm/nouveau/dispnv50/disp.c     |  2 +-
>  drivers/gpu/drm/nouveau/nouveau_connector.c | 21 +++++++++++++++++++--
>  drivers/gpu/drm/nouveau/nouveau_connector.h |  3 +++
>  3 files changed, 23 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> index ea2a886854fe..0f283ca75189 100644
> --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
> +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> @@ -858,7 +858,7 @@ static const struct drm_connector_funcs
>  nv50_mstc = {
>         .reset = nouveau_conn_reset,
>         .detect = nv50_mstc_detect,
> -       .fill_modes = drm_helper_probe_single_connector_modes,
> +       .fill_modes = nouveau_connector_probe_single_connector_modes,
>         .destroy = nv50_mstc_destroy,
>         .atomic_duplicate_state = nouveau_conn_atomic_duplicate_state,
>         .atomic_destroy_state = nouveau_conn_atomic_destroy_state,
> diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
> index 2a45b4c2ceb0..feb142fb7a8a 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_connector.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
> @@ -770,6 +770,23 @@ nouveau_connector_force(struct drm_connector *connector)
>         nouveau_connector_set_encoder(connector, nv_encoder);
>  }
>
> +int
> +nouveau_connector_probe_single_connector_modes(struct drm_connector *connector,
> +                                              uint32_t maxX, uint32_t maxY)
> +{
> +       struct device *dev = connector->dev->dev;
> +       int ret;
> +
> +       ret = pm_runtime_get_sync(dev);
> +       if (WARN_ON(ret < 0 && ret != -EACCES))
> +               return 0;
> +
> +       ret = drm_helper_probe_single_connector_modes(connector, maxX, maxY);
> +
> +       pm_runtime_put_autosuspend(dev);
> +       return ret;
> +}
> +
>  static int
>  nouveau_connector_set_property(struct drm_connector *connector,
>                                struct drm_property *property, uint64_t value)
> @@ -1088,7 +1105,7 @@ nouveau_connector_funcs = {
>         .reset = nouveau_conn_reset,
>         .detect = nouveau_connector_detect,
>         .force = nouveau_connector_force,
> -       .fill_modes = drm_helper_probe_single_connector_modes,
> +       .fill_modes = nouveau_connector_probe_single_connector_modes,
>         .set_property = nouveau_connector_set_property,
>         .destroy = nouveau_connector_destroy,
>         .atomic_duplicate_state = nouveau_conn_atomic_duplicate_state,
> @@ -1103,7 +1120,7 @@ nouveau_connector_funcs_lvds = {
>         .reset = nouveau_conn_reset,
>         .detect = nouveau_connector_detect_lvds,
>         .force = nouveau_connector_force,
> -       .fill_modes = drm_helper_probe_single_connector_modes,
> +       .fill_modes = nouveau_connector_probe_single_connector_modes,
>         .set_property = nouveau_connector_set_property,
>         .destroy = nouveau_connector_destroy,
>         .atomic_duplicate_state = nouveau_conn_atomic_duplicate_state,
> diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.h b/drivers/gpu/drm/nouveau/nouveau_connector.h
> index 2d9d35a146a4..e9ffc6eebda2 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_connector.h
> +++ b/drivers/gpu/drm/nouveau/nouveau_connector.h
> @@ -106,6 +106,9 @@ nouveau_crtc_connector_get(struct nouveau_crtc *nv_crtc)
>
>  struct drm_connector *
>  nouveau_connector_create(struct drm_device *, const struct dcb_output *);
> +int
> +nouveau_connector_probe_single_connector_modes(struct drm_connector *,
> +                                              uint32_t, uint32_t);
>
>  extern int nouveau_tv_disable;
>  extern int nouveau_ignorelid;
> --
> 2.17.1
>
> _______________________________________________
> Nouveau mailing list
> Nouveau@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/nouveau
diff mbox

Patch

diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index ea2a886854fe..0f283ca75189 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -858,7 +858,7 @@  static const struct drm_connector_funcs
 nv50_mstc = {
 	.reset = nouveau_conn_reset,
 	.detect = nv50_mstc_detect,
-	.fill_modes = drm_helper_probe_single_connector_modes,
+	.fill_modes = nouveau_connector_probe_single_connector_modes,
 	.destroy = nv50_mstc_destroy,
 	.atomic_duplicate_state = nouveau_conn_atomic_duplicate_state,
 	.atomic_destroy_state = nouveau_conn_atomic_destroy_state,
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 2a45b4c2ceb0..feb142fb7a8a 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -770,6 +770,23 @@  nouveau_connector_force(struct drm_connector *connector)
 	nouveau_connector_set_encoder(connector, nv_encoder);
 }
 
+int
+nouveau_connector_probe_single_connector_modes(struct drm_connector *connector,
+					       uint32_t maxX, uint32_t maxY)
+{
+	struct device *dev = connector->dev->dev;
+	int ret;
+
+	ret = pm_runtime_get_sync(dev);
+	if (WARN_ON(ret < 0 && ret != -EACCES))
+		return 0;
+
+	ret = drm_helper_probe_single_connector_modes(connector, maxX, maxY);
+
+	pm_runtime_put_autosuspend(dev);
+	return ret;
+}
+
 static int
 nouveau_connector_set_property(struct drm_connector *connector,
 			       struct drm_property *property, uint64_t value)
@@ -1088,7 +1105,7 @@  nouveau_connector_funcs = {
 	.reset = nouveau_conn_reset,
 	.detect = nouveau_connector_detect,
 	.force = nouveau_connector_force,
-	.fill_modes = drm_helper_probe_single_connector_modes,
+	.fill_modes = nouveau_connector_probe_single_connector_modes,
 	.set_property = nouveau_connector_set_property,
 	.destroy = nouveau_connector_destroy,
 	.atomic_duplicate_state = nouveau_conn_atomic_duplicate_state,
@@ -1103,7 +1120,7 @@  nouveau_connector_funcs_lvds = {
 	.reset = nouveau_conn_reset,
 	.detect = nouveau_connector_detect_lvds,
 	.force = nouveau_connector_force,
-	.fill_modes = drm_helper_probe_single_connector_modes,
+	.fill_modes = nouveau_connector_probe_single_connector_modes,
 	.set_property = nouveau_connector_set_property,
 	.destroy = nouveau_connector_destroy,
 	.atomic_duplicate_state = nouveau_conn_atomic_duplicate_state,
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.h b/drivers/gpu/drm/nouveau/nouveau_connector.h
index 2d9d35a146a4..e9ffc6eebda2 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.h
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.h
@@ -106,6 +106,9 @@  nouveau_crtc_connector_get(struct nouveau_crtc *nv_crtc)
 
 struct drm_connector *
 nouveau_connector_create(struct drm_device *, const struct dcb_output *);
+int
+nouveau_connector_probe_single_connector_modes(struct drm_connector *,
+					       uint32_t, uint32_t);
 
 extern int nouveau_tv_disable;
 extern int nouveau_ignorelid;