gma500/cdv: Add eDP support
Introduce the eDP support into the driver.
This has been reworked a bit because kernel driver proper uses encoder/connectors
while the legacy Intel driver uses the old output stuff.
It also diverges on the backlight handling. The legacy Intel driver adds a panel
abstraction based upon the i915 one. It's only really used for backlight bits
and we have a perfectly good backlight abstraction which can extend instead.
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
[ported to upstream driver, redid backlight abstraction]
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/gma500/backlight.c b/drivers/gpu/drm/gma500/backlight.c
index 20793951..143eba3 100644
--- a/drivers/gpu/drm/gma500/backlight.c
+++ b/drivers/gpu/drm/gma500/backlight.c
@@ -26,10 +26,55 @@
#include "intel_bios.h"
#include "power.h"
+static void do_gma_backlight_set(struct drm_device *dev)
+{
+#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ backlight_update_status(dev_priv->backlight_device);
+#endif
+}
+
+void gma_backlight_enable(struct drm_device *dev)
+{
+#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ dev_priv->backlight_enabled = true;
+ if (dev_priv->backlight_device) {
+ dev_priv->backlight_device->props.brightness = dev_priv->backlight_level;
+ do_gma_backlight_set(dev);
+ }
+#endif
+}
+
+void gma_backlight_disable(struct drm_device *dev)
+{
+#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ dev_priv->backlight_enabled = false;
+ if (dev_priv->backlight_device) {
+ dev_priv->backlight_device->props.brightness = 0;
+ do_gma_backlight_set(dev);
+ }
+#endif
+}
+
+void gma_backlight_set(struct drm_device *dev, int v)
+{
+#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ dev_priv->backlight_level = v;
+ if (dev_priv->backlight_device && dev_priv->backlight_enabled) {
+ dev_priv->backlight_device->props.brightness = v;
+ do_gma_backlight_set(dev);
+ }
+#endif
+}
+
int gma_backlight_init(struct drm_device *dev)
{
#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
struct drm_psb_private *dev_priv = dev->dev_private;
+ dev_priv->backlight_enabled = true;
return dev_priv->ops->backlight_init(dev);
#else
return 0;