This function is the pendant of drm_of_find_panel_or_bridge() to remove a previously allocated panel_bridge. Given a specific port and endpoint it remove the panel bridge. Since drm_panel_bridge_remove() will check that bridge parameter is not NULL and is a real drm_panel_bridge and no a simple bridge it is safe to call it directly.
Signed-off-by: Benjamin Gaignard benjamin.gaignard@linaro.org Reviewed-by: Philippe Cornu philippe.cornu@st.com Tested-by: Philippe Cornu philippe.cornu@st.com --- drivers/gpu/drm/drm_of.c | 33 +++++++++++++++++++++++++++++++++ include/drm/drm_of.h | 8 ++++++++ 2 files changed, 41 insertions(+)
diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c index 8dafbdf..6b54f17 100644 --- a/drivers/gpu/drm/drm_of.c +++ b/drivers/gpu/drm/drm_of.c @@ -260,3 +260,36 @@ int drm_of_find_panel_or_bridge(const struct device_node *np, return ret; } EXPORT_SYMBOL_GPL(drm_of_find_panel_or_bridge); + +#ifdef CONFIG_DRM_PANEL_BRIDGE +/* + * drm_of_panel_bridge_remove - remove panel bridge + * @np: device tree node containing panel bridge output ports + * + * Remove the panel bridge of a given DT node's port and endpoint number + * + * Returns zero if successful, or one of the standard error codes if it fails. + */ +int drm_of_panel_bridge_remove(const struct device_node *np, + int port, int endpoint) +{ + struct drm_bridge *bridge; + struct device_node *remote; + + remote = of_graph_get_remote_node(np, port, endpoint); + if (!remote) + return -ENODEV; + + bridge = of_drm_find_bridge(remote); + drm_panel_bridge_remove(bridge); + + return 0; +} +#else +int drm_of_panel_bridge_remove(const struct device_node *np, + int port, int endpoint) +{ + return -EINVAL; +} +#endif +EXPORT_SYMBOL_GPL(drm_of_panel_bridge_remove); diff --git a/include/drm/drm_of.h b/include/drm/drm_of.h index 104dd51..390966e 100644 --- a/include/drm/drm_of.h +++ b/include/drm/drm_of.h @@ -29,6 +29,8 @@ int drm_of_find_panel_or_bridge(const struct device_node *np, int port, int endpoint, struct drm_panel **panel, struct drm_bridge **bridge); +int drm_of_panel_bridge_remove(const struct device_node *np, + int port, int endpoint); #else static inline uint32_t drm_of_find_possible_crtcs(struct drm_device *dev, struct device_node *port) @@ -65,6 +67,12 @@ static inline int drm_of_find_panel_or_bridge(const struct device_node *np, { return -EINVAL; } + +static inline int drm_of_panel_bridge_remove(const struct device_node *np, + int port, int endpoint) +{ + return -EINVAL; +} #endif
static inline int drm_of_encoder_active_endpoint_id(struct device_node *node,