drm/i915: clean up backlight conditional build

I've always felt the backlight device conditional build has been all
backwards. Make it feel right.

Gently move things towards connector based stuff while at it.

There should be no functional changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 37 insertions, 28 deletions

diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index f161ac02c4f..a0d13d3173e 100644
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -709,16 +709,6 @@ static void intel_panel_init_backlight_regs(struct drm_device *dev)
 	}
 }
 
-static void intel_panel_init_backlight(struct drm_device *dev)
-{
-	struct drm_i915_private *dev_priv = dev->dev_private;
-
-	intel_panel_init_backlight_regs(dev);
-
-	dev_priv->backlight.level = intel_panel_get_backlight(dev, 0);
-	dev_priv->backlight.enabled = dev_priv->backlight.level != 0;
-}
-
 enum drm_connector_status
 intel_panel_detect(struct drm_device *dev)
 {
@@ -742,7 +732,7 @@ intel_panel_detect(struct drm_device *dev)
 }
 
 #if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE)
-static int intel_panel_update_status(struct backlight_device *bd)
+static int intel_backlight_device_update_status(struct backlight_device *bd)
 {
 	struct intel_connector *connector = bl_get_data(bd);
 	struct drm_device *dev = connector->base.dev;
@@ -756,7 +746,7 @@ static int intel_panel_update_status(struct backlight_device *bd)
 	return 0;
 }
 
-static int intel_panel_get_brightness(struct backlight_device *bd)
+static int intel_backlight_device_get_brightness(struct backlight_device *bd)
 {
 	struct intel_connector *connector = bl_get_data(bd);
 	struct drm_device *dev = connector->base.dev;
@@ -771,20 +761,18 @@ static int intel_panel_get_brightness(struct backlight_device *bd)
 	return intel_panel_get_backlight(connector->base.dev, pipe);
 }
 
-static const struct backlight_ops intel_panel_bl_ops = {
-	.update_status = intel_panel_update_status,
-	.get_brightness = intel_panel_get_brightness,
+static const struct backlight_ops intel_backlight_device_ops = {
+	.update_status = intel_backlight_device_update_status,
+	.get_brightness = intel_backlight_device_get_brightness,
 };
 
-int intel_panel_setup_backlight(struct drm_connector *connector)
+static int intel_backlight_device_register(struct intel_connector *connector)
 {
-	struct drm_device *dev = connector->dev;
+	struct drm_device *dev = connector->base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct backlight_properties props;
 	unsigned long flags;
 
-	intel_panel_init_backlight(dev);
-
 	if (WARN_ON(dev_priv->backlight.device))
 		return -ENODEV;
 
@@ -802,9 +790,9 @@ int intel_panel_setup_backlight(struct drm_connector *connector)
 	}
 	dev_priv->backlight.device =
 		backlight_device_register("intel_backlight",
-					  connector->kdev,
-					  to_intel_connector(connector),
-					  &intel_panel_bl_ops, &props);
+					  connector->base.kdev,
+					  connector,
+					  &intel_backlight_device_ops, &props);
 
 	if (IS_ERR(dev_priv->backlight.device)) {
 		DRM_ERROR("Failed to register backlight: %ld\n",
@@ -815,26 +803,47 @@ int intel_panel_setup_backlight(struct drm_connector *connector)
 	return 0;
 }
 
-void intel_panel_destroy_backlight(struct drm_device *dev)
+static void intel_backlight_device_unregister(struct intel_connector *connector)
 {
+	struct drm_device *dev = connector->base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	if (dev_priv->backlight.device) {
 		backlight_device_unregister(dev_priv->backlight.device);
 		dev_priv->backlight.device = NULL;
 	}
 }
-#else
+#else /* CONFIG_BACKLIGHT_CLASS_DEVICE */
+static int intel_backlight_device_register(struct intel_connector *connector)
+{
+	return 0;
+}
+static void intel_backlight_device_unregister(struct intel_connector *connector)
+{
+}
+#endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */
+
 int intel_panel_setup_backlight(struct drm_connector *connector)
 {
-	intel_panel_init_backlight(connector->dev);
+	struct drm_device *dev = connector->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_connector *intel_connector = to_intel_connector(connector);
+
+	intel_panel_init_backlight_regs(dev);
+
+	dev_priv->backlight.level = intel_panel_get_backlight(dev, 0);
+	dev_priv->backlight.enabled = dev_priv->backlight.level != 0;
+
+	intel_backlight_device_register(intel_connector);
+
 	return 0;
 }
 
-void intel_panel_destroy_backlight(struct drm_device *dev)
+void intel_panel_destroy_backlight(struct drm_connector *connector)
 {
-	return;
+	struct intel_connector *intel_connector = to_intel_connector(connector);
+
+	intel_backlight_device_unregister(intel_connector);
 }
-#endif
 
 int intel_panel_init(struct intel_panel *panel,
 		     struct drm_display_mode *fixed_mode)