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>

3 files changed, 18 insertions, 12 deletions

diff --git a/drivers/gpu/drm/meson/meson_encoder_cvbs.c b/drivers/gpu/drm/meson/meson_encoder_cvbs.c
index c9678dc68fa1..dc374bfc5951 100644
--- a/drivers/gpu/drm/meson/meson_encoder_cvbs.c
+++ b/drivers/gpu/drm/meson/meson_encoder_cvbs.c
@@ -227,9 +227,12 @@ int meson_encoder_cvbs_probe(struct meson_drm *priv)
 	struct device_node *remote;
 	int ret;
 
-	meson_encoder_cvbs = devm_kzalloc(priv->dev, sizeof(*meson_encoder_cvbs), GFP_KERNEL);
-	if (!meson_encoder_cvbs)
-		return -ENOMEM;
+	meson_encoder_cvbs = devm_drm_bridge_alloc(priv->dev,
+						   struct meson_encoder_cvbs,
+						   bridge,
+						   &meson_encoder_cvbs_bridge_funcs);
+	if (IS_ERR(meson_encoder_cvbs))
+		return PTR_ERR(meson_encoder_cvbs);
 
 	/* CVBS Connector Bridge */
 	remote = of_graph_get_remote_node(priv->dev->of_node, 0, 0);
@@ -245,7 +248,6 @@ int meson_encoder_cvbs_probe(struct meson_drm *priv)
 				     "Failed to find CVBS Connector bridge\n");
 
 	/* CVBS Encoder Bridge */
-	meson_encoder_cvbs->bridge.funcs = &meson_encoder_cvbs_bridge_funcs;
 	meson_encoder_cvbs->bridge.of_node = priv->dev->of_node;
 	meson_encoder_cvbs->bridge.type = DRM_MODE_CONNECTOR_Composite;
 	meson_encoder_cvbs->bridge.ops = DRM_BRIDGE_OP_MODES;
diff --git a/drivers/gpu/drm/meson/meson_encoder_dsi.c b/drivers/gpu/drm/meson/meson_encoder_dsi.c
index 3db518e5f95d..6c6624f9ba24 100644
--- a/drivers/gpu/drm/meson/meson_encoder_dsi.c
+++ b/drivers/gpu/drm/meson/meson_encoder_dsi.c
@@ -106,9 +106,12 @@ int meson_encoder_dsi_probe(struct meson_drm *priv)
 	struct device_node *remote;
 	int ret;
 
-	meson_encoder_dsi = devm_kzalloc(priv->dev, sizeof(*meson_encoder_dsi), GFP_KERNEL);
-	if (!meson_encoder_dsi)
-		return -ENOMEM;
+	meson_encoder_dsi = devm_drm_bridge_alloc(priv->dev,
+						  struct meson_encoder_dsi,
+						  bridge,
+						  &meson_encoder_dsi_bridge_funcs);
+	if (IS_ERR(meson_encoder_dsi))
+		return PTR_ERR(meson_encoder_dsi);
 
 	/* DSI Transceiver Bridge */
 	remote = of_graph_get_remote_node(priv->dev->of_node, 2, 0);
@@ -123,7 +126,6 @@ int meson_encoder_dsi_probe(struct meson_drm *priv)
 				     "Failed to find DSI transceiver bridge\n");
 
 	/* DSI Encoder Bridge */
-	meson_encoder_dsi->bridge.funcs = &meson_encoder_dsi_bridge_funcs;
 	meson_encoder_dsi->bridge.of_node = priv->dev->of_node;
 	meson_encoder_dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;
 
diff --git a/drivers/gpu/drm/meson/meson_encoder_hdmi.c b/drivers/gpu/drm/meson/meson_encoder_hdmi.c
index 040c04b5dff9..5a0d37a257f5 100644
--- a/drivers/gpu/drm/meson/meson_encoder_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_encoder_hdmi.c
@@ -376,9 +376,12 @@ int meson_encoder_hdmi_probe(struct meson_drm *priv)
 	struct device_node *remote;
 	int ret;
 
-	meson_encoder_hdmi = devm_kzalloc(priv->dev, sizeof(*meson_encoder_hdmi), GFP_KERNEL);
-	if (!meson_encoder_hdmi)
-		return -ENOMEM;
+	meson_encoder_hdmi = devm_drm_bridge_alloc(priv->dev,
+						   struct meson_encoder_hdmi,
+						   bridge,
+						   &meson_encoder_hdmi_bridge_funcs);
+	if (IS_ERR(meson_encoder_hdmi))
+		return PTR_ERR(meson_encoder_hdmi);
 
 	/* HDMI Transceiver Bridge */
 	remote = of_graph_get_remote_node(priv->dev->of_node, 1, 0);
@@ -395,7 +398,6 @@ int meson_encoder_hdmi_probe(struct meson_drm *priv)
 	}
 
 	/* HDMI Encoder Bridge */
-	meson_encoder_hdmi->bridge.funcs = &meson_encoder_hdmi_bridge_funcs;
 	meson_encoder_hdmi->bridge.of_node = priv->dev->of_node;
 	meson_encoder_hdmi->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
 	meson_encoder_hdmi->bridge.interlace_allowed = true;