diff options
| author | Arun Siluvery <arun.siluvery@linux.intel.com> | 2016-01-21 21:43:49 +0000 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-01-25 16:48:22 +0100 |
| commit | 3669ab6191b24ee800a5f78d3748b7d96df12115 (patch) | |
| tree | f57bf44d6d37e2b66e88559cc7c793011db29b03 /drivers/gpu/drm/i915/intel_ringbuffer.c | |
| parent | e0f3fa096d6f319d1177b05d824fd8b36517368c (diff) | |
drm/i915/gen9: Add HDC_CHICKEN1 to HW whitelist
Required for WaAllowUMDToModifyHDCChicken1:skl,bxt
This register is added to HW whitelist to support WA required for future
enabling of pre-emptive command execution, WA implementation will be in
userspace and it cannot program this register if it is not on HW whitelist.
v2: explain purpose of changes (Chris)
Reviewed-by: Nick Hoath <nicholas.hoath@intel.com>
Signed-off-by: Arun Siluvery <arun.siluvery@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1453412634-29238-4-git-send-email-arun.siluvery@linux.intel.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_ringbuffer.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index c938b93c4f83..62f535c1b78e 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -986,6 +986,11 @@ static int gen9_init_workarounds(struct intel_engine_cs *ring) if (ret) return ret; + /* WaAllowUMDToModifyHDCChicken1:skl,bxt */ + ret = wa_ring_whitelist_reg(ring, GEN8_HDC_CHICKEN1); + if (ret) + return ret; + return 0; } |