aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/i915/intel_panel.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/i915/intel_panel.c')
-rw-r--r--drivers/gpu/drm/i915/intel_panel.c72
1 files changed, 71 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index 05f500cd9c2..a9e0c7bcd31 100644
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -277,7 +277,7 @@ void intel_panel_enable_backlight(struct drm_device *dev)
dev_priv->backlight_enabled = true;
}
-void intel_panel_setup_backlight(struct drm_device *dev)
+static void intel_panel_init_backlight(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@@ -309,3 +309,73 @@ intel_panel_detect(struct drm_device *dev)
return connector_status_unknown;
}
+
+#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
+static int intel_panel_update_status(struct backlight_device *bd)
+{
+ struct drm_device *dev = bl_get_data(bd);
+ intel_panel_set_backlight(dev, bd->props.brightness);
+ return 0;
+}
+
+static int intel_panel_get_brightness(struct backlight_device *bd)
+{
+ struct drm_device *dev = bl_get_data(bd);
+ return intel_panel_get_backlight(dev);
+}
+
+static const struct backlight_ops intel_panel_bl_ops = {
+ .update_status = intel_panel_update_status,
+ .get_brightness = intel_panel_get_brightness,
+};
+
+int intel_panel_setup_backlight(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct backlight_properties props;
+ struct drm_connector *connector;
+
+ intel_panel_init_backlight(dev);
+
+ if (dev_priv->int_lvds_connector)
+ connector = dev_priv->int_lvds_connector;
+ else if (dev_priv->int_edp_connector)
+ connector = dev_priv->int_edp_connector;
+ else
+ return -ENODEV;
+
+ props.type = BACKLIGHT_RAW;
+ props.max_brightness = intel_panel_get_max_backlight(dev);
+ dev_priv->backlight =
+ backlight_device_register("intel_backlight",
+ &connector->kdev, dev,
+ &intel_panel_bl_ops, &props);
+
+ if (IS_ERR(dev_priv->backlight)) {
+ DRM_ERROR("Failed to register backlight: %ld\n",
+ PTR_ERR(dev_priv->backlight));
+ dev_priv->backlight = NULL;
+ return -ENODEV;
+ }
+ dev_priv->backlight->props.brightness = intel_panel_get_backlight(dev);
+ return 0;
+}
+
+void intel_panel_destroy_backlight(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ if (dev_priv->backlight)
+ backlight_device_unregister(dev_priv->backlight);
+}
+#else
+int intel_panel_setup_backlight(struct drm_device *dev)
+{
+ intel_panel_init_backlight(dev);
+ return 0;
+}
+
+void intel_panel_destroy_backlight(struct drm_device *dev)
+{
+ return;
+}
+#endif