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drm/drm_of: add drm_of_panel_bridge_remove function 

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>
Link: https://patchwork.freedesktop.org/patch/msgid/1506936888-23844-3-git-send-email-benjamin.gaignard@linaro.org
hifive-unleashed-5.1
benjamin.gaignard@linaro.org 2017-10-02 11:34:45 +02:00 committed by Benjamin Gaignard
parent 6b0e284cfa
commit c70087e8f1
2 changed files with 41 additions and 0 deletions
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33
drivers/gpu/drm/drm_of.c
View File

@ -262,3 +262,36 @@ 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);

8
include/drm/drm_of.h
View File

@ -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,