drm/radeon: add get_backlight_level callback
Read back the backlight level from the hw.
Needed for proper backlight restoration on resume.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 4d67f0f..de86b8e 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1174,6 +1174,8 @@
void (*wait_for_vblank)(struct radeon_device *rdev, int crtc);
/* set backlight level */
void (*set_backlight_level)(struct radeon_encoder *radeon_encoder, u8 level);
+ /* get backlight level */
+ u8 (*get_backlight_level)(struct radeon_encoder *radeon_encoder);
} display;
/* copy functions for bo handling */
struct {
@@ -1767,6 +1769,7 @@
#define radeon_irq_process(rdev) (rdev)->asic->irq.process((rdev))
#define radeon_get_vblank_counter(rdev, crtc) (rdev)->asic->display.get_vblank_counter((rdev), (crtc))
#define radeon_set_backlight_level(rdev, e, l) (rdev)->asic->display.set_backlight_level((e), (l))
+#define radeon_get_backlight_level(rdev, e) (rdev)->asic->display.get_backlight_level((e))
#define radeon_fence_ring_emit(rdev, r, fence) (rdev)->asic->ring[(r)].emit_fence((rdev), (fence))
#define radeon_semaphore_ring_emit(rdev, r, cp, semaphore, emit_wait) (rdev)->asic->ring[(r)].emit_semaphore((rdev), (cp), (semaphore), (emit_wait))
#define radeon_copy_blit(rdev, s, d, np, f) (rdev)->asic->copy.blit((rdev), (s), (d), (np), (f))