[PATCH] drm/amdgpu/display: make backlight setting failure messages debug

[Alex Deucher]

Avoid spamming the log.  The backlight controller on DCN chips
gets powered down when the display is off, so if you attempt to
set the backlight level when the display is off, you'll get this
message.  This isn't a problem as we cache the requested backlight
level if it's adjusted when the display is off and set it again
during modeset.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Cc: nicholas.choi at amd.com
Cc: harry.wentland at amd.com
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

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 b8026c1baf36..c1f7456aeaa0 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -3506,7 +3506,7 @@ static int amdgpu_dm_backlight_set_level(struct amdgpu_display_manager *dm,
 			rc = dc_link_set_backlight_level_nits(link[i], true, brightness[i],
 				AUX_BL_DEFAULT_TRANSITION_TIME_MS);
 			if (!rc) {
-				DRM_ERROR("DM: Failed to update backlight via AUX on eDP[%d]\n", i);
+				DRM_DEBUG("DM: Failed to update backlight via AUX on eDP[%d]\n", i);
 				break;
 			}
 		}
@@ -3514,7 +3514,7 @@ static int amdgpu_dm_backlight_set_level(struct amdgpu_display_manager *dm,
 		for (i = 0; i < dm->num_of_edps; i++) {
 			rc = dc_link_set_backlight_level(dm->backlight_link[i], brightness[i], 0);
 			if (!rc) {
-				DRM_ERROR("DM: Failed to update backlight on eDP[%d]\n", i);
+				DRM_DEBUG("DM: Failed to update backlight on eDP[%d]\n", i);
 				break;
 			}
 		}
-- 
2.31.1