drm/radeon: drop confusing message about backlight control

The message is harmless and confusing.  On PX systems,
there is one ATIF method, but potentially multiple GPUs
leading to an error on the GPU with no backlight control.

Bug: https://bugzilla.kernel.org/show_bug.cgi?id=115011
Signed-off-by: Alex Deucher <[email protected]>
Cc: Hans de Goede <[email protected]>

diff --git a/drivers/gpu/drm/radeon/radeon_acpi.c b/drivers/gpu/drm/radeon/radeon_acpi.c
index 59acd0e5c2c6384705fdda0a6b89e65be5f5abc4..31c9a92d6a1b89da90863e761fa4701f15d3ad3f 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_acpi.c
+++ b/drivers/gpu/drm/radeon/radeon_acpi.c
@@ -741,13 +741,6 @@ int radeon_acpi_init(struct radeon_device *rdev)
                }
 
                atif->encoder_for_bl = target;
-               if (!target) {
-                       /* Brightness change notification is enabled, but we
-                        * didn't find a backlight controller, this should
-                        * never happen.
-                        */
-                       DRM_ERROR("Cannot find a backlight controller\n");
-               }
        }
 
        if (atif->functions.sbios_requests && !atif->functions.system_params) {