diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2011-11-28 23:49:26 +0400 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2011-12-01 13:56:31 +0400 |
| commit | f64964796dedca340608fb1075ab6baad5625851 (patch) | |
| tree | 60812ba63cd0ffe4da61d5cbdf5b97c27a3eb474 /drivers/gpu/drm/radeon/r100.c | |
| parent | 4f3e0b1d33bfeb1e05e53073c6f277176ff9e368 (diff) | |
| download | linux-f64964796dedca340608fb1075ab6baad5625851.tar.xz | |
drm/radeon/kms: add some loop timeouts in pageflip code
Avoid infinite loops waiting for surface updates if a GPU
reset happens while waiting for a page flip.
See:
https://bugs.freedesktop.org/show_bug.cgi?id=43191
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@kernel.org
Reviewed-by: Mario Kleiner <mario.kleiner@tuebingen.mpg.de>
Tested-by: Simon Farnsworth <simon.farnsworth@onelan.co.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/r100.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/r100.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c index ad158ea49901..bfc08f6320f8 100644 --- a/drivers/gpu/drm/radeon/r100.c +++ b/drivers/gpu/drm/radeon/r100.c @@ -187,13 +187,18 @@ u32 r100_page_flip(struct radeon_device *rdev, int crtc_id, u64 crtc_base) { struct radeon_crtc *radeon_crtc = rdev->mode_info.crtcs[crtc_id]; u32 tmp = ((u32)crtc_base) | RADEON_CRTC_OFFSET__OFFSET_LOCK; + int i; /* Lock the graphics update lock */ /* update the scanout addresses */ WREG32(RADEON_CRTC_OFFSET + radeon_crtc->crtc_offset, tmp); /* Wait for update_pending to go high. */ - while (!(RREG32(RADEON_CRTC_OFFSET + radeon_crtc->crtc_offset) & RADEON_CRTC_OFFSET__GUI_TRIG_OFFSET)); + for (i = 0; i < rdev->usec_timeout; i++) { + if (RREG32(RADEON_CRTC_OFFSET + radeon_crtc->crtc_offset) & RADEON_CRTC_OFFSET__GUI_TRIG_OFFSET) + break; + udelay(1); + } DRM_DEBUG("Update pending now high. Unlocking vupdate_lock.\n"); /* Unlock the lock, so double-buffering can take place inside vblank */ |