The backlight device .get_brightness callback is supposed to return the
actual brightness by querying the hardware, not the cached value. See
Documentation/ABI/stable/sysfs-class-backlight. The callback is there to
support the actual_brightness sysfs file.
With the backlight_level and backlight device brightness now in sync, one
can reliably get the cached value through the brightness sysfs file.
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
drivers/gpu/drm/i915/intel_panel.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index 725d726..ca2179d 100644
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -415,8 +415,7 @@ static int intel_panel_update_status(struct backlight_device *bd)
static int intel_panel_get_brightness(struct backlight_device *bd)
{
struct drm_device *dev = bl_get_data(bd);
- struct drm_i915_private *dev_priv = dev->dev_private;
- return dev_priv->backlight_level;
+ return intel_panel_get_backlight(dev);
}
static const struct backlight_ops intel_panel_bl_ops = {
--
1.7.9.5
