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Commit d668046c authored by Dave Airlie's avatar Dave Airlie
Browse files

drm/radeon/kms: enable ACPI powermanagement mode on radeon gpus. 



Some GPUs have an APM/ACPI PM mode selection switch and some BIOSes
set this to APM. We really want this in ACPI mode for Linux.

Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 08a370fa

drivers/gpu/drm/radeon/r100.c

+7 −0
Original line number Diff line number Diff line
@@ -1809,6 +1809,7 @@ void r100_set_common_regs(struct radeon_device *rdev) 
{

	struct drm_device *dev = rdev->ddev;

	bool force_dac2 = false;

	u32 tmp;



	/* set these so they don't interfere with anything */

	WREG32(RADEON_OV0_SCALE_CNTL, 0);
@@ -1880,6 +1881,12 @@ void r100_set_common_regs(struct radeon_device *rdev) 
		WREG32(RADEON_DISP_HW_DEBUG, disp_hw_debug);

		WREG32(RADEON_DAC_CNTL2, dac2_cntl);

	}



	/* switch PM block to ACPI mode */

	tmp = RREG32_PLL(RADEON_PLL_PWRMGT_CNTL);

	tmp &= ~RADEON_PM_MODE_SEL;

	WREG32_PLL(RADEON_PLL_PWRMGT_CNTL, tmp);



}



/*

drivers/gpu/drm/radeon/radeon_reg.h

+1 −0
Original line number Diff line number Diff line
@@ -346,6 +346,7 @@ 
#       define RADEON_TVPLL_PWRMGT_OFF      (1 << 30)

#       define RADEON_TVCLK_TURNOFF         (1 << 31)

#define RADEON_PLL_PWRMGT_CNTL              0x0015 /* PLL */

#	define RADEON_PM_MODE_SEL           (1 << 13)

#       define RADEON_TCL_BYPASS_DISABLE    (1 << 20)

#define RADEON_CLR_CMP_CLR_3D               0x1a24

#define RADEON_CLR_CMP_CLR_DST              0x15c8