The Apple GMUX is the one managing the backlight, so there is no need for
Nouveau to register its own backlight interface.
Signed-off-by: Pierre Moreau <pierre.morrow at free.fr>
---
drm/nouveau/nouveau_backlight.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drm/nouveau/nouveau_backlight.c b/drm/nouveau/nouveau_backlight.c
index 914e2cb..37a1577 100644
--- a/drm/nouveau/nouveau_backlight.c
+++ b/drm/nouveau/nouveau_backlight.c
@@ -30,6 +30,7 @@
* Register locations derived from NVClock by Roderick Colenbrander
*/
+#include <linux/apple-gmux.h>
#include <linux/backlight.h>
#include "nouveau_drm.h"
@@ -239,6 +240,12 @@ nouveau_backlight_init(struct drm_device *dev)
struct nvif_device *device = &drm->device;
struct drm_connector *connector;
+ if (apple_gmux_present()) {
+ NV_INFO(drm, "Apple GMUX detected: not registering Nouveau"
+ " backlight interface");
+ return 0;
+ }
+
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
if (connector->connector_type != DRM_MODE_CONNECTOR_LVDS &&
connector->connector_type != DRM_MODE_CONNECTOR_eDP)
--
2.8.0
