diff options
| author |   Dave Airlie <airlied@redhat.com> | 2010-03-31 13:38:56 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2010-04-01 12:50:19 +1000 |
| commit | 9e5786bd14cb9ffe29ebe66d41cedf03311b0d30 (patch) | |
| tree | 18a1bec350a97117f4540e96323eb0efad3f9b36 /drivers/gpu | |
| parent | drm/radeon/kms/evergreen: get DP working (diff) | |
| download | linux-dev-9e5786bd14cb9ffe29ebe66d41cedf03311b0d30.tar.xz linux-dev-9e5786bd14cb9ffe29ebe66d41cedf03311b0d30.zip | |
drm/radeon/kms: add sanity check to wptr.
If we resume in a bad way, we'll get 0xffffffff in wptr, and then
oops with no console. This just adds a sanity check so that we can
avoid the oops and hopefully get more details out of people's systems.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/radeon/r100.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c index 138ddd49dfc5..c8f4b0300b70 100644 --- a/drivers/gpu/drm/radeon/r100.c +++ b/drivers/gpu/drm/radeon/r100.c @@ -744,6 +744,8 @@ int r100_cp_init(struct radeon_device *rdev, unsigned ring_size) udelay(10); rdev->cp.rptr = RREG32(RADEON_CP_RB_RPTR); rdev->cp.wptr = RREG32(RADEON_CP_RB_WPTR); + /* protect against crazy HW on resume */ + rdev->cp.wptr &= rdev->cp.ptr_mask; /* Set cp mode to bus mastering & enable cp*/ WREG32(RADEON_CP_CSQ_MODE, REG_SET(RADEON_INDIRECT2_START, indirect2_start) | |