On Fri, Jan 25, 2013 at 1:10 PM, Chris Staite <chris at yourdreamnet.co.uk>
wrote:
> From: Christopher Staite <chris at yourdreamnet.co.uk>
>
> Fix commit 62444b7462a2b98bc78d68736c03a7c4e66ba7e2 for HD 6450. The stop
> and resume causes the screen to glitch and the X server to reboot constantly.
> Re-instating the UPDATE_LOCK fixes the issue in tests on the v3.6.11 stable,
> and the code has not been altered to fix this since.
>
> Signed-off-by: Christopher Staite <chris at yourdreamnet.co.uk>
>
Looks good. I've updated the patch to handle the DCE6 case and
improved the commit message. I'll go ahead and add it to my next
-fixes pull.
Thanks,
Alex
>
>
> --- drivers/gpu/drm/radeon/evergreen.c.org 2013-01-25 17:45:06.000000000
> +0000
> +++ drivers/gpu/drm/radeon/evergreen.c 2013-01-25 17:48:14.000000000 +0000
> @@ -1320,7 +1320,9 @@ void evergreen_mc_stop(struct radeon_dev
> if (!(tmp &
> EVERGREEN_CRTC_DISP_READ_REQUEST_DISABLE)) {
> radeon_wait_for_vblank(rdev, i);
> tmp |=
> EVERGREEN_CRTC_DISP_READ_REQUEST_DISABLE;
> + WREG32(EVERGREEN_CRTC_UPDATE_LOCK +
> crtc_offsets[i], 1);
> WREG32(EVERGREEN_CRTC_CONTROL +
> crtc_offsets[i], tmp);
> + WREG32(EVERGREEN_CRTC_UPDATE_LOCK +
> crtc_offsets[i], 0);
> }
> }
> /* wait for the next frame */
> @@ -1382,7 +1384,9 @@ void evergreen_mc_resume(struct radeon_d
> } else {
> tmp = RREG32(EVERGREEN_CRTC_CONTROL +
> crtc_offsets[i]);
> tmp &=
> ~EVERGREEN_CRTC_DISP_READ_REQUEST_DISABLE;
> + WREG32(EVERGREEN_CRTC_UPDATE_LOCK +
> crtc_offsets[i], 1);
> WREG32(EVERGREEN_CRTC_CONTROL +
> crtc_offsets[i], tmp);
> + WREG32(EVERGREEN_CRTC_UPDATE_LOCK +
> crtc_offsets[i], 0);
> }
> /* wait for the next frame */
> frame_count = radeon_get_vblank_counter(rdev, i);
> _______________________________________________
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> dri-devel at lists.freedesktop.org
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