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drm/bridge: lt9611: switch to of_drm_get_bridge_by_endpoint()

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This driver calls drm_of_find_panel_or_bridge() with a NULL pointer in the
@panel parameter, thus using a reduced feature set of that function.
Replace this call with the simpler of_drm_get_bridge_by_endpoint().

Since of_drm_get_bridge_by_endpoint() increases the refcount of the
returned bridge, ensure it is put on removal. To achieve this, instead of
adding an explicit drm_bridge_put(), migrate to the bridge::next_bridge
pointer which is automatically put when the bridge is eventually freed.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://patch.msgid.link/20260511-drm-bridge-alloc-getput-panel_or_bridge-v6-7-f61c9e498b3f@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
This commit is contained in:
Luca Ceresoli 2026-05-11 18:40:11 +02:00
parent 91b42aa55c
commit cd9517f6e2
1 changed files with 6 additions and 3 deletions
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9
drivers/gpu/drm/bridge/lontium-lt9611.c
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@ -37,7 +37,6 @@
struct lt9611 {
struct device *dev;
struct drm_bridge bridge;
struct drm_bridge *next_bridge;
struct regmap *regmap;
@ -761,7 +760,7 @@ static int lt9611_bridge_attach(struct drm_bridge *bridge,
{
struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
return drm_bridge_attach(encoder, lt9611->next_bridge,
return drm_bridge_attach(encoder, lt9611->bridge.next_bridge,
bridge, flags);
}
@ -1058,7 +1057,11 @@ static int lt9611_parse_dt(struct device *dev,
lt9611->ac_mode = of_property_read_bool(dev->of_node, "lt,ac-mode");
return drm_of_find_panel_or_bridge(dev->of_node, 2, -1, NULL, &lt9611->next_bridge);
lt9611->bridge.next_bridge = of_drm_get_bridge_by_endpoint(dev->of_node, 2, -1);
if (IS_ERR(lt9611->bridge.next_bridge))
return PTR_ERR(lt9611->bridge.next_bridge);
return 0;
}
static int lt9611_gpio_init(struct lt9611 *lt9611)