Commit 7a26f9ad authored Feb 18, 2015 by Nathan-J. Hirschauer Committed by Alex Deucher Feb 25, 2015

drm/radeon: enable native backlight control on old macs



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: Nathan-J. Hirschauer <nathanhi@deepserve.info>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

parent 5b49afd6

drivers/gpu/drm/radeon/radeon_encoders.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}