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drm/bridge: Add a devm_ allocator for panel bridge.

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This will let drivers reduce the error cleanup they need, in
particular the "is_panel_bridge" flag.

v2: Slight cleanup of remove function by Andrzej

Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Philippe Cornu <philippe.cornu@st.com>
Tested-by: Philippe Cornu <philippe.cornu@st.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170718210510.12229-2-eric@anholt.net
This commit is contained in:
Eric Anholt 2017-07-18 14:05:06 -07:00
parent 15b4511a4a
commit 67022227ff
2 changed files with 33 additions and 0 deletions
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30
drivers/gpu/drm/bridge/panel.c
View File

@ -195,3 +195,33 @@ void drm_panel_bridge_remove(struct drm_bridge *bridge)
devm_kfree(panel_bridge->panel->dev, bridge);
}
EXPORT_SYMBOL(drm_panel_bridge_remove);
static void devm_drm_panel_bridge_release(struct device *dev, void *res)
{
struct drm_bridge **bridge = res;
drm_panel_bridge_remove(*bridge);
}
struct drm_bridge *devm_drm_panel_bridge_add(struct device *dev,
struct drm_panel *panel,
u32 connector_type)
{
struct drm_bridge **ptr, *bridge;
ptr = devres_alloc(devm_drm_panel_bridge_release, sizeof(*ptr),
GFP_KERNEL);
if (!ptr)
return ERR_PTR(-ENOMEM);
bridge = drm_panel_bridge_add(panel, connector_type);
if (!IS_ERR(bridge)) {
*ptr = bridge;
devres_add(dev, ptr);
} else {
devres_free(ptr);
}
return bridge;
}
EXPORT_SYMBOL(devm_drm_panel_bridge_add);

3
include/drm/drm_bridge.h
View File

@ -268,6 +268,9 @@ void drm_bridge_enable(struct drm_bridge *bridge);
struct drm_bridge *drm_panel_bridge_add(struct drm_panel *panel,
u32 connector_type);
void drm_panel_bridge_remove(struct drm_bridge *bridge);
struct drm_bridge *devm_drm_panel_bridge_add(struct device *dev,
struct drm_panel *panel,
u32 connector_type);
#endif
#endif