diff options
| author | Dave Airlie <airlied@starflyer.(none)> | 2005-09-30 17:09:07 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@linux.ie> | 2005-09-30 17:09:07 +1000 |
| commit | 689b9d74b1c00e1316fbb7d1e912fe1227fdb1ab (patch) | |
| tree | 46d53c2d2ecb31d3db08f034052106030a9d8046 /drivers/char/drm/radeon_cp.c | |
| parent | b6ce156c415544f900e031890c78eba8bc92f9b3 (diff) | |
drm: add option to force writeback off.
In order to get some better debugging from people about certain hangs/crashes
we need to be able to turn AGP writeback off permanently...
Signed-off-by: Dave Airlie <airlied@linux.ie>
Diffstat (limited to 'drivers/char/drm/radeon_cp.c')
| -rw-r--r-- | drivers/char/drm/radeon_cp.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/char/drm/radeon_cp.c b/drivers/char/drm/radeon_cp.c index 447bfbe0da8..e64d680899f 100644 --- a/drivers/char/drm/radeon_cp.c +++ b/drivers/char/drm/radeon_cp.c @@ -1205,6 +1205,10 @@ static void radeon_cp_init_ring_buffer(drm_device_t * dev, dev_priv->writeback_works = 0; DRM_DEBUG("writeback test failed\n"); } + if (radeon_no_wb == 1) { + dev_priv->writeback_works = 0; + DRM_DEBUG("writeback forced off\n"); + } dev_priv->sarea_priv->last_frame = dev_priv->scratch[0] = 0; RADEON_WRITE(RADEON_LAST_FRAME_REG, dev_priv->sarea_priv->last_frame); |