diff mbox series

[v2] drm/connector: Add of_drm_find_connector

Message ID 20200703094506.22527-1-andy.yan@rock-chips.com
State New, archived
Headers show
Series [v2] drm/connector: Add of_drm_find_connector | expand

Commit Message

Andy Yan July 3, 2020, 9:45 a.m. UTC
Add a function to look up a connector by
device tree node, like what of_drm_find_bridge/panel
does.

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Reported-by: kernel test robot <lkp@intel.com>

---

Changes in v2:
- Add function declaration

 drivers/gpu/drm/drm_connector.c | 33 +++++++++++++++++++++++++++++++++
 include/drm/drm_connector.h     | 14 ++++++++++++++
 2 files changed, 47 insertions(+)

Comments

Andy Yan July 31, 2020, 2:33 a.m. UTC | #1
ping

On 7/3/20 5:45 PM, Andy Yan wrote:
> Add a function to look up a connector by
> device tree node, like what of_drm_find_bridge/panel
> does.
>
> Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
> Reported-by: kernel test robot <lkp@intel.com>
>
> ---
>
> Changes in v2:
> - Add function declaration
>
>   drivers/gpu/drm/drm_connector.c | 33 +++++++++++++++++++++++++++++++++
>   include/drm/drm_connector.h     | 14 ++++++++++++++
>   2 files changed, 47 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> index d877ddc6dc57..516376cd1868 100644
> --- a/drivers/gpu/drm/drm_connector.c
> +++ b/drivers/gpu/drm/drm_connector.c
> @@ -743,6 +743,39 @@ void drm_connector_list_iter_end(struct drm_connector_list_iter *iter)
>   }
>   EXPORT_SYMBOL(drm_connector_list_iter_end);
>   
> +#ifdef CONFIG_OF
> +/**
> + * of_drm_find_connector - look up a connector using a device tree node
> + * @np: device tree node of the connector
> + *
> + *
> + * Return: A pointer to the connector which match the specified device tree
> + * node or NULL if no panel matching the device tree node can be found, or
> + * -ENODEV: the device is not available (status != "okay" or "ok")
> + */
> +struct drm_connector *of_drm_find_connector(struct drm_device *dev, const struct device_node *np)
> +{
> +	struct drm_connector *connector;
> +	struct drm_connector_list_iter conn_iter;
> +
> +	if (!of_device_is_available(np))
> +		return ERR_PTR(-ENODEV);
> +
> +	drm_connector_list_iter_begin(dev, &conn_iter);
> +	drm_for_each_connector_iter(connector, &conn_iter) {
> +		if (connector->of_node == np) {
> +			drm_connector_list_iter_end(&conn_iter);
> +			return connector;
> +		}
> +	}
> +	drm_connector_list_iter_end(&conn_iter);
> +
> +	return NULL;
> +}
> +EXPORT_SYMBOL(of_drm_find_connector);
> +#endif
> +
> +
>   static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
>   	{ SubPixelUnknown, "Unknown" },
>   	{ SubPixelHorizontalRGB, "Horizontal RGB" },
> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> index fd543d1db9b2..d249e0498375 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -1129,6 +1129,9 @@ struct drm_connector {
>   	/** @attr: sysfs attributes */
>   	struct device_attribute *attr;
>   
> +	/** @of_node: device tree node */
> +	struct device_node *of_node;
> +
>   	/**
>   	 * @head:
>   	 *
> @@ -1647,6 +1650,17 @@ void drm_connector_list_iter_end(struct drm_connector_list_iter *iter);
>   bool drm_connector_has_possible_encoder(struct drm_connector *connector,
>   					struct drm_encoder *encoder);
>   
> +#if defined(CONFIG_OF)
> +struct drm_connector *
> +of_drm_find_connector(struct drm_device *dev, const struct device_node *np);
> +#else
> +static inline struct drm_connector *
> +of_drm_find_connector(struct drm_device *dev, const struct device_node *np)
> +{
> +	return ERR_PTR(-ENODEV);
> +}
> +#endif
> +
>   /**
>    * drm_for_each_connector_iter - connector_list iterator macro
>    * @connector: &struct drm_connector pointer used as cursor
Daniel Vetter July 31, 2020, 6:17 a.m. UTC | #2
On Fri, Jul 31, 2020 at 4:33 AM Andy Yan <andy.yan@rock-chips.com> wrote:
>
> ping
>
> On 7/3/20 5:45 PM, Andy Yan wrote:
> > Add a function to look up a connector by
> > device tree node, like what of_drm_find_bridge/panel
> > does.
> >
> > Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
> > Reported-by: kernel test robot <lkp@intel.com>

I'm pretty sure the answer is "no", but without a user for this it's
impossible to tell I guess. Always send out the patches using new
stuff together with the new stuff.
-Daniel

> >
> > ---
> >
> > Changes in v2:
> > - Add function declaration
> >
> >   drivers/gpu/drm/drm_connector.c | 33 +++++++++++++++++++++++++++++++++
> >   include/drm/drm_connector.h     | 14 ++++++++++++++
> >   2 files changed, 47 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> > index d877ddc6dc57..516376cd1868 100644
> > --- a/drivers/gpu/drm/drm_connector.c
> > +++ b/drivers/gpu/drm/drm_connector.c
> > @@ -743,6 +743,39 @@ void drm_connector_list_iter_end(struct drm_connector_list_iter *iter)
> >   }
> >   EXPORT_SYMBOL(drm_connector_list_iter_end);
> >
> > +#ifdef CONFIG_OF
> > +/**
> > + * of_drm_find_connector - look up a connector using a device tree node
> > + * @np: device tree node of the connector
> > + *
> > + *
> > + * Return: A pointer to the connector which match the specified device tree
> > + * node or NULL if no panel matching the device tree node can be found, or
> > + * -ENODEV: the device is not available (status != "okay" or "ok")
> > + */
> > +struct drm_connector *of_drm_find_connector(struct drm_device *dev, const struct device_node *np)
> > +{
> > +     struct drm_connector *connector;
> > +     struct drm_connector_list_iter conn_iter;
> > +
> > +     if (!of_device_is_available(np))
> > +             return ERR_PTR(-ENODEV);
> > +
> > +     drm_connector_list_iter_begin(dev, &conn_iter);
> > +     drm_for_each_connector_iter(connector, &conn_iter) {
> > +             if (connector->of_node == np) {
> > +                     drm_connector_list_iter_end(&conn_iter);
> > +                     return connector;
> > +             }
> > +     }
> > +     drm_connector_list_iter_end(&conn_iter);
> > +
> > +     return NULL;
> > +}
> > +EXPORT_SYMBOL(of_drm_find_connector);
> > +#endif
> > +
> > +
> >   static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
> >       { SubPixelUnknown, "Unknown" },
> >       { SubPixelHorizontalRGB, "Horizontal RGB" },
> > diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> > index fd543d1db9b2..d249e0498375 100644
> > --- a/include/drm/drm_connector.h
> > +++ b/include/drm/drm_connector.h
> > @@ -1129,6 +1129,9 @@ struct drm_connector {
> >       /** @attr: sysfs attributes */
> >       struct device_attribute *attr;
> >
> > +     /** @of_node: device tree node */
> > +     struct device_node *of_node;
> > +
> >       /**
> >        * @head:
> >        *
> > @@ -1647,6 +1650,17 @@ void drm_connector_list_iter_end(struct drm_connector_list_iter *iter);
> >   bool drm_connector_has_possible_encoder(struct drm_connector *connector,
> >                                       struct drm_encoder *encoder);
> >
> > +#if defined(CONFIG_OF)
> > +struct drm_connector *
> > +of_drm_find_connector(struct drm_device *dev, const struct device_node *np);
> > +#else
> > +static inline struct drm_connector *
> > +of_drm_find_connector(struct drm_device *dev, const struct device_node *np)
> > +{
> > +     return ERR_PTR(-ENODEV);
> > +}
> > +#endif
> > +
> >   /**
> >    * drm_for_each_connector_iter - connector_list iterator macro
> >    * @connector: &struct drm_connector pointer used as cursor
>
>
diff mbox series

Patch

diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index d877ddc6dc57..516376cd1868 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -743,6 +743,39 @@  void drm_connector_list_iter_end(struct drm_connector_list_iter *iter)
 }
 EXPORT_SYMBOL(drm_connector_list_iter_end);
 
+#ifdef CONFIG_OF
+/**
+ * of_drm_find_connector - look up a connector using a device tree node
+ * @np: device tree node of the connector
+ *
+ *
+ * Return: A pointer to the connector which match the specified device tree
+ * node or NULL if no panel matching the device tree node can be found, or
+ * -ENODEV: the device is not available (status != "okay" or "ok")
+ */
+struct drm_connector *of_drm_find_connector(struct drm_device *dev, const struct device_node *np)
+{
+	struct drm_connector *connector;
+	struct drm_connector_list_iter conn_iter;
+
+	if (!of_device_is_available(np))
+		return ERR_PTR(-ENODEV);
+
+	drm_connector_list_iter_begin(dev, &conn_iter);
+	drm_for_each_connector_iter(connector, &conn_iter) {
+		if (connector->of_node == np) {
+			drm_connector_list_iter_end(&conn_iter);
+			return connector;
+		}
+	}
+	drm_connector_list_iter_end(&conn_iter);
+
+	return NULL;
+}
+EXPORT_SYMBOL(of_drm_find_connector);
+#endif
+
+
 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
 	{ SubPixelUnknown, "Unknown" },
 	{ SubPixelHorizontalRGB, "Horizontal RGB" },
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index fd543d1db9b2..d249e0498375 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -1129,6 +1129,9 @@  struct drm_connector {
 	/** @attr: sysfs attributes */
 	struct device_attribute *attr;
 
+	/** @of_node: device tree node */
+	struct device_node *of_node;
+
 	/**
 	 * @head:
 	 *
@@ -1647,6 +1650,17 @@  void drm_connector_list_iter_end(struct drm_connector_list_iter *iter);
 bool drm_connector_has_possible_encoder(struct drm_connector *connector,
 					struct drm_encoder *encoder);
 
+#if defined(CONFIG_OF)
+struct drm_connector *
+of_drm_find_connector(struct drm_device *dev, const struct device_node *np);
+#else
+static inline struct drm_connector *
+of_drm_find_connector(struct drm_device *dev, const struct device_node *np)
+{
+	return ERR_PTR(-ENODEV);
+}
+#endif
+
 /**
  * drm_for_each_connector_iter - connector_list iterator macro
  * @connector: &struct drm_connector pointer used as cursor