drm/radeon: restore backlight level on resume
Restore the backlight level on resume. Some systems
need to explicitly restore the backlight level on
resume.
Fixes panel resume on my Trinity laptop and may fix the
following bugs:
https://bugs.freedesktop.org/show_bug.cgi?id=43829
https://bugzilla.kernel.org/show_bug.cgi?id=46241
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index 917d027..5277618 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -254,12 +254,14 @@
struct radeon_fbdev *rfbdev;
/* firmware flags */
u16 firmware_flags;
+ /* pointer to backlight encoder */
+ struct radeon_encoder *bl_encoder;
};
-#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
-
#define RADEON_MAX_BL_LEVEL 0xFF
+#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
+
struct radeon_backlight_privdata {
struct radeon_encoder *encoder;
uint8_t negative;