From 689b9d74b1c00e1316fbb7d1e912fe1227fdb1ab Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Fri, 30 Sep 2005 17:09:07 +1000 Subject: 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 --- drivers/char/drm/radeon_cp.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/char/drm/radeon_cp.c') diff --git a/drivers/char/drm/radeon_cp.c b/drivers/char/drm/radeon_cp.c index 447bfbe0da8a..e64d680899f5 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); -- cgit v1.2.3