drm/gma500: Make cdv lvds use ddc adapter from drm_connector

We're moving all uses of ddc_bus to drm_connector where they belong.
Also, add missing call to destroy ddc bus when destroying the connector
and cleanup the error handling in cdv_intel_lvds_init().
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220601092311.22648-4-patrik.r.jakobsson@gmail.com

drivers/gpu/drm/gma500/cdv_intel_lvds.c

@@ -317,18 +317,12 @@ static int cdv_intel_lvds_get_modes(struct drm_connector *connector)
 	return 0;
 }
 
-/**
- * cdv_intel_lvds_destroy - unregister and free LVDS structures
- * @connector: connector to free
- *
- * Unregister the DDC bus for this connector then free the driver private
- * structure.
- */
 static void cdv_intel_lvds_destroy(struct drm_connector *connector)
 {
 	struct gma_connector *gma_connector = to_gma_connector(connector);
 	struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 
+	gma_i2c_destroy(to_gma_i2c_chan(connector->ddc));
 	gma_i2c_destroy(gma_encoder->i2c_bus);
 	drm_connector_cleanup(connector);
 	kfree(gma_connector);
@@ -487,8 +481,10 @@ void cdv_intel_lvds_init(struct drm_device *dev,
 	struct drm_display_mode *scan;
 	struct drm_crtc *crtc;
 	struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
+	struct gma_i2c_chan *ddc_bus;
 	u32 lvds;
 	int pipe;
+	int ret;
 	u8 pin;
 
 	if (!dev_priv->lvds_enabled_in_vbt)
@@ -508,11 +504,11 @@ void cdv_intel_lvds_init(struct drm_device *dev,
 	gma_connector = kzalloc(sizeof(struct gma_connector),
 				      GFP_KERNEL);
 	if (!gma_connector)
-		goto failed_connector;
+		goto err_free_encoder;
 
 	lvds_priv = kzalloc(sizeof(struct cdv_intel_lvds_priv), GFP_KERNEL);
 	if (!lvds_priv)
-		goto failed_lvds_priv;
+		goto err_free_connector;
 
 	gma_encoder->dev_priv = lvds_priv;
 
@@ -521,12 +517,24 @@ void cdv_intel_lvds_init(struct drm_device *dev,
 	gma_connector->restore = cdv_intel_lvds_restore;
 	encoder = &gma_encoder->base;
 
+	/* Set up the DDC bus. */
+	ddc_bus = gma_i2c_create(dev, GPIOC, "LVDSDDC_C");
+	if (!ddc_bus) {
+		dev_printk(KERN_ERR, dev->dev,
+			   "DDC bus registration " "failed.\n");
+		goto err_free_lvds_priv;
+	}
 
-	drm_connector_init(dev, connector,
-			   &cdv_intel_lvds_connector_funcs,
-			   DRM_MODE_CONNECTOR_LVDS);
+	ret = drm_connector_init_with_ddc(dev, connector,
+					  &cdv_intel_lvds_connector_funcs,
+					  DRM_MODE_CONNECTOR_LVDS,
+					  &ddc_bus->base);
+	if (ret)
+		goto err_destroy_ddc;
 
-	drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_LVDS);
+	ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_LVDS);
+	if (ret)
+		goto err_connector_cleanup;
 
 	gma_connector_attach_encoder(gma_connector, gma_encoder);
 	gma_encoder->type = INTEL_OUTPUT_LVDS;
@@ -554,7 +562,7 @@ void cdv_intel_lvds_init(struct drm_device *dev,
 	if (!gma_encoder->i2c_bus) {
 		dev_printk(KERN_ERR,
 			dev->dev, "I2C bus registration failed.\n");
-		goto failed_blc_i2c;
+		goto err_encoder_cleanup;
 	}
 	gma_encoder->i2c_bus->slave_addr = 0x2C;
 	dev_priv->lvds_i2c_bus = gma_encoder->i2c_bus;
@@ -569,21 +577,13 @@ void cdv_intel_lvds_init(struct drm_device *dev,
 	 *    if closed, act like it's not there for now
 	 */
 
-	/* Set up the DDC bus. */
-	gma_encoder->ddc_bus = gma_i2c_create(dev, GPIOC, "LVDSDDC_C");
-	if (!gma_encoder->ddc_bus) {
-		dev_printk(KERN_ERR, dev->dev,
-			   "DDC bus registration " "failed.\n");
-		goto failed_ddc;
-	}
-
 	/*
 	 * Attempt to get the fixed panel mode from DDC.  Assume that the
 	 * preferred mode is the right one.
 	 */
 	mutex_lock(&dev->mode_config.mutex);
-	psb_intel_ddc_get_modes(connector,
-				&gma_encoder->ddc_bus->base);
+	psb_intel_ddc_get_modes(connector, &ddc_bus->base);
+
 	list_for_each_entry(scan, &connector->probed_modes, head) {
 		if (scan->type & DRM_MODE_TYPE_PREFERRED) {
 			mode_dev->panel_fixed_mode =
@@ -625,7 +625,7 @@ void cdv_intel_lvds_init(struct drm_device *dev,
 	if (!mode_dev->panel_fixed_mode) {
 		DRM_DEBUG
 			("Found no modes on the lvds, ignoring the LVDS\n");
-		goto failed_find;
+		goto err_unlock;
 	}
 
 	/* setup PWM */
@@ -645,20 +645,19 @@ void cdv_intel_lvds_init(struct drm_device *dev,
 	mutex_unlock(&dev->mode_config.mutex);
 	return;
 
-failed_find:
+err_unlock:
 	mutex_unlock(&dev->mode_config.mutex);
-	pr_err("Failed find\n");
-	gma_i2c_destroy(gma_encoder->ddc_bus);
-failed_ddc:
-	pr_err("Failed DDC\n");
 	gma_i2c_destroy(gma_encoder->i2c_bus);
-failed_blc_i2c:
-	pr_err("Failed BLC\n");
+err_encoder_cleanup:
 	drm_encoder_cleanup(encoder);
+err_connector_cleanup:
 	drm_connector_cleanup(connector);
+err_destroy_ddc:
+	gma_i2c_destroy(ddc_bus);
+err_free_lvds_priv:
 	kfree(lvds_priv);
-failed_lvds_priv:
+err_free_connector:
 	kfree(gma_connector);
-failed_connector:
+err_free_encoder:
 	kfree(gma_encoder);
 }