drm/msm/dsi: do not store internal bridge pointer

Since the driver was switched to devm_drm_bridge_add(), there is no need
anymore to store the created bridge instance in struct msm_dsi. Drop
this field and pass data directly.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/561693/
Link: https://lore.kernel.org/r/20231009205727.2781802-2-dmitry.baryshkov@linaro.org

drivers/gpu/drm/msm/dsi/dsi.c

@@ -216,6 +216,7 @@ void __exit msm_dsi_unregister(void)
 int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
 			 struct drm_encoder *encoder)
 {
+	struct drm_bridge *bridge;
 	int ret;
 
 	msm_dsi->dev = dev;
@@ -237,13 +238,14 @@ int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
 
 	msm_dsi->encoder = encoder;
 
-	ret = msm_dsi_manager_bridge_init(msm_dsi);
-	if (ret) {
+	bridge = msm_dsi_manager_bridge_init(msm_dsi);
+	if (IS_ERR(bridge)) {
+		ret = PTR_ERR(bridge);
 		DRM_DEV_ERROR(dev->dev, "failed to create dsi bridge: %d\n", ret);
 		return ret;
 	}
 
-	ret = msm_dsi_manager_ext_bridge_init(msm_dsi->id);
+	ret = msm_dsi_manager_ext_bridge_init(msm_dsi->id, bridge);
 	if (ret) {
 		DRM_DEV_ERROR(dev->dev,
 			"failed to create dsi connector: %d\n", ret);

drivers/gpu/drm/msm/dsi/dsi.h

@@ -35,9 +35,6 @@ struct msm_dsi {
 	struct drm_device *dev;
 	struct platform_device *pdev;
 
-	/* internal dsi bridge attached to MDP interface */
-	struct drm_bridge *bridge;
-
 	struct mipi_dsi_host *host;
 	struct msm_dsi_phy *phy;
 
@@ -56,8 +53,8 @@ struct msm_dsi {
 };
 
 /* dsi manager */
-int msm_dsi_manager_bridge_init(struct msm_dsi *msm_dsi);
-int msm_dsi_manager_ext_bridge_init(u8 id);
+struct drm_bridge *msm_dsi_manager_bridge_init(struct msm_dsi *msm_dsi);
+int msm_dsi_manager_ext_bridge_init(u8 id, struct drm_bridge *int_bridge);
 int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg);
 bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len);
 int msm_dsi_manager_register(struct msm_dsi *msm_dsi);

drivers/gpu/drm/msm/dsi/dsi_manager.c

@@ -466,9 +466,9 @@ static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {
 };
 
 /* initialize bridge */
-int msm_dsi_manager_bridge_init(struct msm_dsi *msm_dsi)
+struct drm_bridge *msm_dsi_manager_bridge_init(struct msm_dsi *msm_dsi)
 {
-	struct drm_bridge *bridge = NULL;
+	struct drm_bridge *bridge;
 	struct dsi_bridge *dsi_bridge;
 	struct drm_encoder *encoder;
 	int ret;
@@ -476,7 +476,7 @@ int msm_dsi_manager_bridge_init(struct msm_dsi *msm_dsi)
 	dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,
 				sizeof(*dsi_bridge), GFP_KERNEL);
 	if (!dsi_bridge)
-		return -ENOMEM;
+		return ERR_PTR(-ENOMEM);
 
 	dsi_bridge->id = msm_dsi->id;
 
@@ -487,26 +487,23 @@ int msm_dsi_manager_bridge_init(struct msm_dsi *msm_dsi)
 
 	ret = devm_drm_bridge_add(msm_dsi->dev->dev, bridge);
 	if (ret)
-		return ret;
+		return ERR_PTR(ret);
 
 	ret = drm_bridge_attach(encoder, bridge, NULL, 0);
 	if (ret)
-		return ret;
+		return ERR_PTR(ret);
 
-	msm_dsi->bridge = bridge;
-
-	return 0;
+	return bridge;
 }
 
-int msm_dsi_manager_ext_bridge_init(u8 id)
+int msm_dsi_manager_ext_bridge_init(u8 id, struct drm_bridge *int_bridge)
 {
 	struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
 	struct drm_device *dev = msm_dsi->dev;
 	struct drm_encoder *encoder;
-	struct drm_bridge *int_bridge, *ext_bridge;
+	struct drm_bridge *ext_bridge;
 	int ret;
 
-	int_bridge = msm_dsi->bridge;
 	ext_bridge = devm_drm_of_get_bridge(&msm_dsi->pdev->dev,
 					    msm_dsi->pdev->dev.of_node, 1, 0);
 	if (IS_ERR(ext_bridge))