From 626fa80c1b9537f4cac95a34614f17f50b4b985b Mon Sep 17 00:00:00 2001
From: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Date: Wed, 30 Jul 2025 14:32:37 -0400
Subject: [PATCH] asahi: optimize pass type with depth-only passes

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36399>
---
 src/asahi/lib/agx_linker.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/asahi/lib/agx_linker.c b/src/asahi/lib/agx_linker.c
index b96505ff6a1..7591095704f 100644
--- a/src/asahi/lib/agx_linker.c
+++ b/src/asahi/lib/agx_linker.c
@@ -205,6 +205,12 @@ agx_fast_link(struct agx_linked_shader *linked, struct agx_device *dev,
          cfg.unk_5 = 0x0;
       }
 
+      /* If we skip the fragment shader, we can optimize the pass type */
+      if (tag_write_disable) {
+         reads_tib = false;
+         writes_sample_mask = false;
+      }
+
       agx_pack(&linked->fragment_control, FRAGMENT_CONTROL, cfg) {
          cfg.tag_write_disable = tag_write_disable;
          cfg.disable_tri_merging = disable_tri_merging;