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authorAlex Deucher <alexander.deucher@amd.com>2013-06-10 17:57:07 +0400
committerAlex Deucher <alexander.deucher@amd.com>2013-06-12 16:22:49 +0400
commit80101790670385a85aca35ecae4b89e3f2fceecc (patch)
treeec5655e8f5eb1a260d83559497682e0dc3bc21a1 /drivers/gpu/drm/radeon/atombios_encoders.c
parentf100380ecd8287b0909d3c5694784adc46e78a4a (diff)
downloadlinux-80101790670385a85aca35ecae4b89e3f2fceecc.tar.xz
drm/radeon: add backlight quirk for hybrid mac
Mac laptops with multiple GPUs apparently use the gmux driver for backlight control. Don't register a radeon backlight interface. We may need to add other pci ids for other hybrid mac laptops. Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=65377 Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/gpu/drm/radeon/atombios_encoders.c')
-rw-r--r--drivers/gpu/drm/radeon/atombios_encoders.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c b/drivers/gpu/drm/radeon/atombios_encoders.c
index 8406c8251fbf..4120d355cadd 100644
--- a/drivers/gpu/drm/radeon/atombios_encoders.c
+++ b/drivers/gpu/drm/radeon/atombios_encoders.c
@@ -186,6 +186,13 @@ void radeon_atom_backlight_init(struct radeon_encoder *radeon_encoder,
u8 backlight_level;
char bl_name[16];
+ /* Mac laptops with multiple GPUs use the gmux driver for backlight
+ * so don't register a backlight device
+ */
+ if ((rdev->pdev->subsystem_vendor == PCI_VENDOR_ID_APPLE) &&
+ (rdev->pdev->device == 0x6741))
+ return;
+
if (!radeon_encoder->enc_priv)
return;