Commit ba59d6da authored by Nathan-J. Hirschauer's avatar Nathan-J. Hirschauer Committed by Greg Kroah-Hartman

drm/radeon: enable native backlight control on old macs

commit 7a26f9ad upstream.

Commit b7bc596e ("drm/radeon: disable native
backlight control on pre-r6xx asics (v2)") accidently
broke backlight control on old mac laptops that use the
on-GPU backlight controller.
Signed-off-by: default avatarNathan-J. Hirschauer <nathanhi@deepserve.info>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 556621de
......@@ -179,9 +179,12 @@ static void radeon_encoder_add_backlight(struct radeon_encoder *radeon_encoder,
(rdev->pdev->subsystem_vendor == 0x1734) &&
(rdev->pdev->subsystem_device == 0x1107))
use_bl = false;
/* Older PPC macs use on-GPU backlight controller */
#ifndef CONFIG_PPC_PMAC
/* disable native backlight control on older asics */
else if (rdev->family < CHIP_R600)
use_bl = false;
#endif
else
use_bl = true;
}
......
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