[Mesa-dev] [PATCH 2/9] intel/blorp: Use the hardware op for CCS ambiguate on gen10+

[Jason Ekstrand]

Cannonlake hardware adds a new resolve type in 3DSTATE_PS called
FAST_CLEAR_0 which does an ambiguate.  Now that the hardware can do it
directly, we should use that instead of binding the CCS as a render
target and doing it manually.  This was tested with a full Vulkan CTS
run on Cannonlake.
---
 src/intel/blorp/blorp_clear.c     | 12 +++++++++++-
 src/intel/blorp/blorp_genX_exec.h |  6 ++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/intel/blorp/blorp_clear.c b/src/intel/blorp/blorp_clear.c
index 618625b..2ae783d 100644
--- a/src/intel/blorp/blorp_clear.c
+++ b/src/intel/blorp/blorp_clear.c
@@ -857,7 +857,11 @@ blorp_ccs_resolve(struct blorp_batch *batch,
    params.x1 = ALIGN(params.x1, x_scaledown) / x_scaledown;
    params.y1 = ALIGN(params.y1, y_scaledown) / y_scaledown;
 
-   if (batch->blorp->isl_dev->info->gen >= 9) {
+   if (batch->blorp->isl_dev->info->gen >= 10) {
+      assert(resolve_op == ISL_AUX_OP_FULL_RESOLVE ||
+             resolve_op == ISL_AUX_OP_PARTIAL_RESOLVE ||
+             resolve_op == ISL_AUX_OP_AMBIGUATE);
+   } else if (batch->blorp->isl_dev->info->gen >= 9) {
       assert(resolve_op == ISL_AUX_OP_FULL_RESOLVE ||
              resolve_op == ISL_AUX_OP_PARTIAL_RESOLVE);
    } else {
@@ -1015,6 +1019,12 @@ blorp_ccs_ambiguate(struct blorp_batch *batch,
                     struct blorp_surf *surf,
                     uint32_t level, uint32_t layer)
 {
+   if (ISL_DEV_GEN(batch->blorp->isl_dev) >= 10) {
+      /* On gen10 and above, we have a hardware resolve op for this */
+      return blorp_ccs_resolve(batch, surf, level, layer, 1,
+                               surf->surf->format, ISL_AUX_OP_AMBIGUATE);
+   }
+
    struct blorp_params params;
    blorp_params_init(&params);
 
diff --git a/src/intel/blorp/blorp_genX_exec.h b/src/intel/blorp/blorp_genX_exec.h
index 593521b..023b1ae 100644
--- a/src/intel/blorp/blorp_genX_exec.h
+++ b/src/intel/blorp/blorp_genX_exec.h
@@ -787,6 +787,12 @@ blorp_emit_ps_config(struct blorp_batch *batch,
       switch (params->fast_clear_op) {
       case ISL_AUX_OP_NONE:
          break;
+#if GEN_GEN >= 10
+      case ISL_AUX_OP_AMBIGUATE:
+         ps.RenderTargetFastClearEnable = true;
+         ps.RenderTargetResolveType = FAST_CLEAR_0;
+         break;
+#endif
 #if GEN_GEN >= 9
       case ISL_AUX_OP_PARTIAL_RESOLVE:
          ps.RenderTargetResolveType = RESOLVE_PARTIAL;
-- 
2.5.0.400.gff86faf