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drm/bridge: imx8qxp-pxl2dpi: get/put the companion bridge

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This driver obtains a bridge pointer from of_drm_find_bridge() in the probe
function and stores it until driver removal. of_drm_find_bridge() is
deprecated. Move to of_drm_find_and_get_bridge() for the bridge to be
refcounted and use the destroy hook to put the reference on deallocation.

Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://patch.msgid.link/20251216-drm-bridge-alloc-getput-drm_of_find_bridge-v3-17-b5165fab8058@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
This commit is contained in:
Luca Ceresoli 2025-12-16 18:58:50 +01:00
parent 6802c7ee36
commit 900699ba83
1 changed files with 9 additions and 1 deletions
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10
drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c
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@ -63,6 +63,13 @@ static int imx8qxp_pxl2dpi_bridge_attach(struct drm_bridge *bridge,
DRM_BRIDGE_ATTACH_NO_CONNECTOR);
}
static void imx8qxp_pxl2dpi_bridge_destroy(struct drm_bridge *bridge)
{
struct imx8qxp_pxl2dpi *p2d = bridge->driver_private;
drm_bridge_put(p2d->companion);
}
static int
imx8qxp_pxl2dpi_bridge_atomic_check(struct drm_bridge *bridge,
struct drm_bridge_state *bridge_state,
@ -205,6 +212,7 @@ static const struct drm_bridge_funcs imx8qxp_pxl2dpi_bridge_funcs = {
.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
.atomic_reset = drm_atomic_helper_bridge_reset,
.attach = imx8qxp_pxl2dpi_bridge_attach,
.destroy = imx8qxp_pxl2dpi_bridge_destroy,
.atomic_check = imx8qxp_pxl2dpi_bridge_atomic_check,
.mode_set = imx8qxp_pxl2dpi_bridge_mode_set,
.atomic_disable = imx8qxp_pxl2dpi_bridge_atomic_disable,
@ -333,7 +341,7 @@ static int imx8qxp_pxl2dpi_parse_dt_companion(struct imx8qxp_pxl2dpi *p2d)
goto out;
}
p2d->companion = of_drm_find_bridge(companion);
p2d->companion = of_drm_find_and_get_bridge(companion);
if (!p2d->companion) {
ret = -EPROBE_DEFER;
DRM_DEV_DEBUG_DRIVER(p2d->dev,