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drm/radeon: disable the crtcs in mc_stop (r5xx-r7xx) (v2)

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Just disabling the mem requests should be enough, but
that doesn't seem to work correctly on efi systems.

v2: blank displays first, then disable.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Deucher 2013-04-17 09:35:39 -04:00
parent 968c01664c
commit e884fc640c
2 changed files with 12 additions and 0 deletions
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1
drivers/gpu/drm/radeon/r500_reg.h
View File

@ -360,6 +360,7 @@
#define AVIVO_D1MODE_MASTER_UPDATE_LOCK 0x60e0
#define AVIVO_D1MODE_MASTER_UPDATE_MODE 0x60e4
#define AVIVO_D1CRTC_UPDATE_LOCK 0x60e8
/* master controls */
#define AVIVO_DC_CRTC_MASTER_EN 0x60f8

11
drivers/gpu/drm/radeon/rv515.c
View File

@ -303,8 +303,10 @@ void rv515_mc_stop(struct radeon_device *rdev, struct rv515_mc_save *save)
tmp = RREG32(AVIVO_D1CRTC_CONTROL + crtc_offsets[i]);
if (!(tmp & AVIVO_CRTC_DISP_READ_REQUEST_DISABLE)) {
radeon_wait_for_vblank(rdev, i);
WREG32(AVIVO_D1CRTC_UPDATE_LOCK + crtc_offsets[i], 1);
tmp |= AVIVO_CRTC_DISP_READ_REQUEST_DISABLE;
WREG32(AVIVO_D1CRTC_CONTROL + crtc_offsets[i], tmp);
WREG32(AVIVO_D1CRTC_UPDATE_LOCK + crtc_offsets[i], 0);
}
/* wait for the next frame */
frame_count = radeon_get_vblank_counter(rdev, i);
@ -313,6 +315,15 @@ void rv515_mc_stop(struct radeon_device *rdev, struct rv515_mc_save *save)
break;
udelay(1);
}
/* XXX this is a hack to avoid strange behavior with EFI on certain systems */
WREG32(AVIVO_D1CRTC_UPDATE_LOCK + crtc_offsets[i], 1);
tmp = RREG32(AVIVO_D1CRTC_CONTROL + crtc_offsets[i]);
tmp &= ~AVIVO_CRTC_EN;
WREG32(AVIVO_D1CRTC_CONTROL + crtc_offsets[i], tmp);
WREG32(AVIVO_D1CRTC_UPDATE_LOCK + crtc_offsets[i], 0);
save->crtc_enabled[i] = false;
/* ***** */
} else {
save->crtc_enabled[i] = false;
}