[Mesa-dev] [PATCH v4 08/18] intel/blorp: Update clear color state buffer during fast clears.

[Rafael Antognolli]

We always want to update the fast clear color during a fast clear on
i965. On anv, we doing that before a resolve, but by adding support to
blorp, we can do a similar thing and update it during a fast clear
instead.

The goal is to remove some code from anv that does such update, and
centralize everything in blorp, hopefully removing a lot of code
duplication. It also allows us to have a similar behavior on gen < 9 and
gen >= 10.

Signed-off-by: Rafael Antognolli <rafael.antognolli at intel.com>
---
 src/intel/blorp/blorp_genX_exec.h | 48 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/src/intel/blorp/blorp_genX_exec.h b/src/intel/blorp/blorp_genX_exec.h
index c68767a2faa..eef6ed8291a 100644
--- a/src/intel/blorp/blorp_genX_exec.h
+++ b/src/intel/blorp/blorp_genX_exec.h
@@ -1642,6 +1642,51 @@ blorp_emit_gen8_hiz_op(struct blorp_batch *batch,
 }
 #endif
 
+static void
+blorp_update_clear_color(struct blorp_batch *batch,
+                         const struct brw_blorp_surface_info *info,
+                         enum isl_aux_op op)
+{
+   if (info->clear_color_addr.buffer && op == ISL_AUX_OP_FAST_CLEAR) {
+#if GEN_GEN >= 9
+      for (int i = 0; i < 4; i++) {
+         blorp_emit(batch, GENX(MI_STORE_DATA_IMM), sdi) {
+            sdi.Address = info->clear_color_addr;
+            sdi.Address.offset += i * 4;
+            sdi.ImmediateData = info->clear_color.u32[i];
+         }
+      }
+#elif GEN_GEN >= 7
+      blorp_emit(batch, GENX(MI_STORE_DATA_IMM), sdi) {
+         sdi.Address = info->clear_color_addr;
+         sdi.ImmediateData = ISL_CHANNEL_SELECT_RED   << 25 |
+                             ISL_CHANNEL_SELECT_GREEN << 22 |
+                             ISL_CHANNEL_SELECT_BLUE  << 19 |
+                             ISL_CHANNEL_SELECT_ALPHA << 16;
+         if (isl_format_has_int_channel(info->view.format)) {
+            for (unsigned i = 0; i < 4; i++) {
+               assert(info->clear_color.u32[i] == 0 ||
+                      info->clear_color.u32[i] == 1);
+            }
+            sdi.ImmediateData |= (info->clear_color.u32[0] != 0) << 31;
+            sdi.ImmediateData |= (info->clear_color.u32[1] != 0) << 30;
+            sdi.ImmediateData |= (info->clear_color.u32[2] != 0) << 29;
+            sdi.ImmediateData |= (info->clear_color.u32[3] != 0) << 28;
+         } else {
+            for (unsigned i = 0; i < 4; i++) {
+               assert(info->clear_color.f32[i] == 0.0f ||
+                      info->clear_color.f32[i] == 1.0f);
+            }
+            sdi.ImmediateData |= (info->clear_color.f32[0] != 0.0f) << 31;
+            sdi.ImmediateData |= (info->clear_color.f32[1] != 0.0f) << 30;
+            sdi.ImmediateData |= (info->clear_color.f32[2] != 0.0f) << 29;
+            sdi.ImmediateData |= (info->clear_color.f32[3] != 0.0f) << 28;
+         }
+      }
+#endif
+   }
+}
+
 /**
  * \brief Execute a blit or render pass operation.
  *
@@ -1654,6 +1699,9 @@ blorp_emit_gen8_hiz_op(struct blorp_batch *batch,
 static void
 blorp_exec(struct blorp_batch *batch, const struct blorp_params *params)
 {
+   blorp_update_clear_color(batch, &params->dst, params->fast_clear_op);
+   blorp_update_clear_color(batch, &params->depth, params->hiz_op);
+
 #if GEN_GEN >= 8
    if (params->hiz_op != ISL_AUX_OP_NONE) {
       blorp_emit_gen8_hiz_op(batch, params);
-- 
2.14.3