Commit 80101790 authored by Alex Deucher's avatar Alex Deucher

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=65377Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
parent f100380e
......@@ -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;
......
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