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drm/radeon: disable the GRPH block when we disable the crtc

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Since we aren't using it when the crtc is disabled, turn it off
to save power.  The GRPH block is the part of the display
controller that controls the primary graphics plane (size,
address, etc.).

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2013-08-21 14:44:15 -04:00
parent d1e3b55648
commit ac4d04d4be
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/radeon/atombios_crtc.c
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@ -1910,6 +1910,12 @@ static void atombios_crtc_disable(struct drm_crtc *crtc)
int i;
atombios_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
/* disable the GRPH */
if (ASIC_IS_DCE4(rdev))
WREG32(EVERGREEN_GRPH_ENABLE + radeon_crtc->crtc_offset, 0);
else if (ASIC_IS_AVIVO(rdev))
WREG32(AVIVO_D1GRPH_ENABLE + radeon_crtc->crtc_offset, 0);
if (ASIC_IS_DCE6(rdev))
atombios_powergate_crtc(crtc, ATOM_ENABLE);