[ 60/73] drm/radeon: disable the crtcs in mc_stop (r5xx-r7xx) (v2)

From: Greg Kroah-Hartman
Date: Thu May 09 2013 - 18:29:53 EST


3.9-stable review patch. If anyone has any objections, please let me know.

------------------

From: Alex Deucher <alexander.deucher@xxxxxxx>

commit e884fc640ccbdb6f94b9bdb57cfb8464b6688f4c upstream.

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@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/gpu/drm/radeon/r500_reg.h | 1 +
drivers/gpu/drm/radeon/rv515.c | 11 +++++++++++
2 files changed, 12 insertions(+)

--- a/drivers/gpu/drm/radeon/r500_reg.h
+++ b/drivers/gpu/drm/radeon/r500_reg.h
@@ -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
--- 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
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
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;
}


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