[PATCH 2/2] drm/amdgpu/display: restore the backlight on modeset (v2)

[Alex Deucher]

To stay consistent with the user's setting.

v2: rebase on multi-eDP support

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1337
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 167c8759fbc9..979e4dafa735 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -9075,6 +9075,12 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
 	/* Update audio instances for each connector. */
 	amdgpu_dm_commit_audio(dev, state);
 
+#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) ||		\
+	defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
+	/* restore the backlight level */
+	if (dm->backlight_dev)
+		amdgpu_dm_backlight_set_level(dm, dm->brightness[0]);
+#endif
 	/*
 	 * send vblank event on all events not handled in flip and
 	 * mark consumed event for drm_atomic_helper_commit_hw_done
-- 
2.31.1