[PATCH v3 17/22] drm/bridge: imx8qxp-pxl2dpi: get/put the companion bridge
From: Luca Ceresoli <luca.ceresoli@bootlin.com>
Date: 2025-12-16 18:00:50
Also in:
dri-devel, imx, linux-amlogic, linux-doc, lkml
Subsystem:
drm drivers, drm drivers and misc gpu patches, drm drivers for bridge chips, drm drivers for freescale imx bridge, the rest · Maintainers:
David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Andrzej Hajda, Neil Armstrong, Robert Foss, Liu Ying, Linus Torvalds
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. Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> --- drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c b/drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c
index 556aec3b3734..2c40ca86e319 100644
--- a/drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c
+++ b/drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c@@ -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,
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2.52.0