asahi: Ignore spilled render targets with partial renders

Partial renders exist to the spill the tilebuffer to memory, there's nothing to
do if it's already spilled (and would just waste memory bandwidth and create a
feedback loop).

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24258>

diff --git a/src/gallium/drivers/asahi/agx_state.c b/src/gallium/drivers/asahi/agx_state.c
index 303ead9..f36101b 100644 (file)
--- a/src/gallium/drivers/asahi/agx_state.c
+++ b/src/gallium/drivers/asahi/agx_state.c
@@ -2261,6 +2261,12 @@ agx_build_meta(struct agx_batch *batch, bool store, bool partial_render)
       if (store) {
          /* TODO: Suppress stores to discarded render targets */
          key.op[rt] = AGX_META_OP_STORE;
+      } else if (batch->tilebuffer_layout.spilled[rt] && partial_render) {
+         /* Partial render programs exist only to store/load the tilebuffer to
+          * main memory. When render targets are already spilled to main memory,
+          * there's nothing to do.
+          */
+         key.op[rt] = AGX_META_OP_NONE;
       } else {
          struct agx_resource *rsrc = agx_resource(surf->texture);
          bool valid = agx_resource_valid(rsrc, surf->u.tex.level);