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Commit 5bead799 authored by Ben Skeggs's avatar Ben Skeggs
Browse files

drm/nouveau: don't expose backlight control when available through ACPI 



Avoid confusing userspace by not publishing backlight controls if ACPI
equivalents are available.

Reported-by: default avatarAaron Sowry <aaron@aeneby.se>
Signed-off-by: default avatarBen Skeggs <bskeggs@redhat.com>
parent cac8f05b

drivers/gpu/drm/nouveau/nouveau_backlight.c

+9 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ 
 */



#include <linux/backlight.h>

#include <linux/acpi.h>



#include "drmP.h"

#include "nouveau_drv.h"
@@ -136,6 +137,14 @@ int nouveau_backlight_init(struct drm_device *dev) 
{

	struct drm_nouveau_private *dev_priv = dev->dev_private;



#ifdef CONFIG_ACPI

	if (acpi_video_backlight_support()) {

		NV_INFO(dev, "ACPI backlight interface available, "

			     "not registering our own\n");

		return 0;

	}

#endif



	switch (dev_priv->card_type) {

	case NV_40:

		return nouveau_nv40_backlight_init(dev);