diff mbox series

drm/bridge/lontium-lt9611uxc: fix provided connector suport

Message ID 20210708230329.395976-1-dmitry.baryshkov@linaro.org (mailing list archive)
State Not Applicable, archived
Headers show
Series drm/bridge/lontium-lt9611uxc: fix provided connector suport | expand

Commit Message

Dmitry Baryshkov July 8, 2021, 11:03 p.m. UTC 
- set DRM_CONNECTOR_POLL_HPD as the connector will generate hotplug
  events on its own

- do not call drm_kms_helper_hotplug_event() unless mode_config.funcs
  pointer is not NULL to remove possible kernel oops.

Fixes: bc6fa8676ebb ("drm/bridge/lontium-lt9611uxc: move HPD notification out of IRQ handler")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

Comments

Dmitry Baryshkov Sept. 27, 2021, 6:31 p.m. UTC | #1 
On 09/07/2021 02:03, Dmitry Baryshkov wrote:
> - set DRM_CONNECTOR_POLL_HPD as the connector will generate hotplug
>    events on its own
> 
> - do not call drm_kms_helper_hotplug_event() unless mode_config.funcs
>    pointer is not NULL to remove possible kernel oops.
> 
> Fixes: bc6fa8676ebb ("drm/bridge/lontium-lt9611uxc: move HPD notification out of IRQ handler")
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---

Gracious ping for review. It would be really nice to get this patch into 
5.16


>   drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 9 ++++++---
>   1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
> index 3cac16db970f..010657ea7af7 100644
> --- a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
> +++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
> @@ -167,9 +167,10 @@ static void lt9611uxc_hpd_work(struct work_struct *work)
>   	struct lt9611uxc *lt9611uxc = container_of(work, struct lt9611uxc, work);
>   	bool connected;
>   
> -	if (lt9611uxc->connector.dev)
> -		drm_kms_helper_hotplug_event(lt9611uxc->connector.dev);
> -	else {
> +	if (lt9611uxc->connector.dev) {
> +		if (lt9611uxc->connector.dev->mode_config.funcs)
> +			drm_kms_helper_hotplug_event(lt9611uxc->connector.dev);
> +	} else {
>   
>   		mutex_lock(&lt9611uxc->ocm_lock);
>   		connected = lt9611uxc->hdmi_connected;
> @@ -339,6 +340,8 @@ static int lt9611uxc_connector_init(struct drm_bridge *bridge, struct lt9611uxc
>   		return -ENODEV;
>   	}
>   
> +	lt9611uxc->connector.polled = DRM_CONNECTOR_POLL_HPD;
> +
>   	drm_connector_helper_add(&lt9611uxc->connector,
>   				 &lt9611uxc_bridge_connector_helper_funcs);
>   	ret = drm_connector_init(bridge->dev, &lt9611uxc->connector,
>
Robert Foss Oct. 6, 2021, noon UTC | #2 
Applied to drm-misc-next

On Fri, 9 Jul 2021 at 01:03, Dmitry Baryshkov
<dmitry.baryshkov@linaro.org> wrote:
>
> - set DRM_CONNECTOR_POLL_HPD as the connector will generate hotplug
>   events on its own
>
> - do not call drm_kms_helper_hotplug_event() unless mode_config.funcs
>   pointer is not NULL to remove possible kernel oops.
>
> Fixes: bc6fa8676ebb ("drm/bridge/lontium-lt9611uxc: move HPD notification out of IRQ handler")
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---
>  drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
> index 3cac16db970f..010657ea7af7 100644
> --- a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
> +++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
> @@ -167,9 +167,10 @@ static void lt9611uxc_hpd_work(struct work_struct *work)
>         struct lt9611uxc *lt9611uxc = container_of(work, struct lt9611uxc, work);
>         bool connected;
>
> -       if (lt9611uxc->connector.dev)
> -               drm_kms_helper_hotplug_event(lt9611uxc->connector.dev);
> -       else {
> +       if (lt9611uxc->connector.dev) {
> +               if (lt9611uxc->connector.dev->mode_config.funcs)
> +                       drm_kms_helper_hotplug_event(lt9611uxc->connector.dev);
> +       } else {
>
>                 mutex_lock(&lt9611uxc->ocm_lock);
>                 connected = lt9611uxc->hdmi_connected;
> @@ -339,6 +340,8 @@ static int lt9611uxc_connector_init(struct drm_bridge *bridge, struct lt9611uxc
>                 return -ENODEV;
>         }
>
> +       lt9611uxc->connector.polled = DRM_CONNECTOR_POLL_HPD;
> +
>         drm_connector_helper_add(&lt9611uxc->connector,
>                                  &lt9611uxc_bridge_connector_helper_funcs);
>         ret = drm_connector_init(bridge->dev, &lt9611uxc->connector,
> --
> 2.30.2
>
diff mbox series

Patch

diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
index 3cac16db970f..010657ea7af7 100644
--- a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
@@ -167,9 +167,10 @@  static void lt9611uxc_hpd_work(struct work_struct *work)
 	struct lt9611uxc *lt9611uxc = container_of(work, struct lt9611uxc, work);
 	bool connected;
 
-	if (lt9611uxc->connector.dev)
-		drm_kms_helper_hotplug_event(lt9611uxc->connector.dev);
-	else {
+	if (lt9611uxc->connector.dev) {
+		if (lt9611uxc->connector.dev->mode_config.funcs)
+			drm_kms_helper_hotplug_event(lt9611uxc->connector.dev);
+	} else {
 
 		mutex_lock(&lt9611uxc->ocm_lock);
 		connected = lt9611uxc->hdmi_connected;
@@ -339,6 +340,8 @@  static int lt9611uxc_connector_init(struct drm_bridge *bridge, struct lt9611uxc
 		return -ENODEV;
 	}
 
+	lt9611uxc->connector.polled = DRM_CONNECTOR_POLL_HPD;
+
 	drm_connector_helper_add(&lt9611uxc->connector,
 				 &lt9611uxc_bridge_connector_helper_funcs);
 	ret = drm_connector_init(bridge->dev, &lt9611uxc->connector,