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drm/nouveau/bl: Do not register interface if Apple GMUX detected 

The Apple GMUX is the one managing the backlight, so there is no need for
Nouveau to register its own backlight interface.

v2: Do not split information message on two lines as it prevents from grepping
    it, as pointed out by Lukas Wunner

v3: Add a missing end-of-line character to the printed message

Signed-off-by: Pierre Moreau <pierre.morrow@free.fr>
Reviewed-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Pierre Moreau 2016-12-08 00:57:09 +01:00 committed by Ben Skeggs
parent db1a0ae214
commit b53ac1ee12
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/nouveau/nouveau_backlight.c
View File

@ -30,6 +30,7 @@
* Register locations derived from NVClock by Roderick Colenbrander
*/
#include <linux/apple-gmux.h>
#include <linux/backlight.h>
#include <linux/idr.h>
@ -267,6 +268,11 @@ 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\n");
return 0;
}
INIT_LIST_HEAD(&drm->bl_connectors);
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {