On Thu, Dec 08, 2016 at 12:57:09AM +0100, Pierre Moreau wrote:
> 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@xxxxxxx>
Reviewed-by: Lukas Wunner <lukas@xxxxxxxxx>
Thanks,
Lukas
> ---
> drm/nouveau/nouveau_backlight.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drm/nouveau/nouveau_backlight.c b/drm/nouveau/nouveau_backlight.c
> index a34cd35..8b1ca4a 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 <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) {
> --
> 2.10.2
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