On Fri, Jul 31, 2020 at 4:33 AM Andy Yan <andy.yan@xxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxx>
> > Reported-by: kernel test robot <lkp@xxxxxxxxx>
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
>
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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