diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/r600.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/r600.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c index 8c94040cb7f..45d565bae71 100644 --- a/drivers/gpu/drm/radeon/r600.c +++ b/drivers/gpu/drm/radeon/r600.c @@ -2900,3 +2900,18 @@ int r600_debugfs_mc_info_init(struct radeon_device *rdev) return 0; #endif } + +/** + * r600_ioctl_wait_idle - flush host path cache on wait idle ioctl + * rdev: radeon device structure + * bo: buffer object struct which userspace is waiting for idle + * + * Some R6XX/R7XX doesn't seems to take into account HDP flush performed + * through ring buffer, this leads to corruption in rendering, see + * http://bugzilla.kernel.org/show_bug.cgi?id=15186 to avoid this we + * directly perform HDP flush by writing register through MMIO. + */ +void r600_ioctl_wait_idle(struct radeon_device *rdev, struct radeon_bo *bo) +{ + WREG32(R_005480_HDP_MEM_COHERENCY_FLUSH_CNTL, 0x1); +} |