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authorAlex Deucher <alexander.deucher@amd.com>2013-04-17 09:35:39 -0400
committerAlex Deucher <alexander.deucher@amd.com>2013-04-22 10:39:09 -0400
commite884fc640ccbdb6f94b9bdb57cfb8464b6688f4c (patch)
tree090414175b00344c145e5d3b4de4874e8c855441 /drivers/gpu/drm/radeon/rv515.c
parent968c01664ccbe0e46c19a1af662c4c266a904203 (diff)
drm/radeon: disable the crtcs in mc_stop (r5xx-r7xx) (v2)
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
Diffstat (limited to 'drivers/gpu/drm/radeon/rv515.c')
-rw-r--r--drivers/gpu/drm/radeon/rv515.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/rv515.c b/drivers/gpu/drm/radeon/rv515.c
index 6a1e5dd5b5ee..ffcba730c57c 100644
--- a/drivers/gpu/drm/radeon/rv515.c
+++ b/drivers/gpu/drm/radeon/rv515.c
@@ -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;
}