drm: convert many bridge drivers from devm_kzalloc() to devm_drm_bridge_alloc() API

devm_drm_bridge_alloc() is the new API to be used for allocating (and
partially initializing) a private driver struct embedding a struct
drm_bridge.

For many drivers having a simple code flow in the probe function, this
commit does a mass conversion automatically with the following semantic
patch. The changes have been reviewed manually for correctness as well as
to find any false positives.

The patch has been applied with the explicit exclusion of bridge/panel.c,
handled by a separate patch.

After applying the semantic patch, manually fixed these issues:

 - 4 drivers need ERR_CAST() instead of PTR_ERR() as the function calling
   devm_drm_bridge_alloc() returns a pointer
 - re-added empty lines and comments that the script had removed but that
   should stay

  @@
  type T;
  identifier C;
  identifier BR;
  expression DEV;
  expression FUNCS;
  @@
  -T *C;
  +T *C;
   ...
  (
  -C = devm_kzalloc(DEV, ...);
  -if (!C)
  -    return -ENOMEM;
  +C = devm_drm_bridge_alloc(DEV, T, BR, FUNCS);
  +if (IS_ERR(C))
  +     return PTR_ERR(C);
  |
  -C = devm_kzalloc(DEV, ...);
  -if (!C)
  -    return ERR_PTR(-ENOMEM);
  +C = devm_drm_bridge_alloc(DEV, T, BR, FUNCS);
  +if (IS_ERR(C))
  +     return PTR_ERR(C);
  )
   ...
  -C->BR.funcs = FUNCS;

Reviewed-by: Manikandan Muralidharan <manikandan.m@microchip.com> # microchip-lvds.c
Reviewed-by: Douglas Anderson <dianders@chromium.org> # parade-ps8640
Tested-by: Douglas Anderson <dianders@chromium.org> # parade-ps8640
Acked-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20250509-drm-bridge-convert-to-alloc-api-v3-2-b8bc1f16d7aa@bootlin.com
[Luca: fixed trivial patch conflict in adv7511_drv.c while applying]
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c
index b2408abb9d49..bb80686a70e1 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp.c
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -2725,9 +2725,10 @@ static int mtk_dp_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	int ret;
 
-	mtk_dp = devm_kzalloc(dev, sizeof(*mtk_dp), GFP_KERNEL);
-	if (!mtk_dp)
-		return -ENOMEM;
+	mtk_dp = devm_drm_bridge_alloc(dev, struct mtk_dp, bridge,
+				       &mtk_dp_bridge_funcs);
+	if (IS_ERR(mtk_dp))
+		return PTR_ERR(mtk_dp);
 
 	mtk_dp->dev = dev;
 	mtk_dp->data = (struct mtk_dp_data *)of_device_get_match_data(dev);
@@ -2785,7 +2786,6 @@ static int mtk_dp_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	mtk_dp->bridge.funcs = &mtk_dp_bridge_funcs;
 	mtk_dp->bridge.of_node = dev->of_node;
 	mtk_dp->bridge.type = mtk_dp->data->bridge_type;