From 9a29d08f9f624a2ce0d55a7a041f0db2b11f8925 Mon Sep 17 00:00:00 2001
From: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Date: Sat, 8 Jun 2024 22:58:49 -0400
Subject: [PATCH] asahi: fix vbo clamp with stride=0

dEQP-VK.pipeline.monolithic.bind_buffers_2.single.stride_0_4_offset_0_0.count_1

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29742>
---
 src/asahi/lib/agx_helpers.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/asahi/lib/agx_helpers.h b/src/asahi/lib/agx_helpers.h
index a9091ce062b..07baf8163fb 100644
--- a/src/asahi/lib/agx_helpers.h
+++ b/src/asahi/lib/agx_helpers.h
@@ -224,7 +224,12 @@ agx_calculate_vbo_clamp(uint64_t vbuf, uint64_t sink, enum pipe_format format,
     */
    if (size_B >= subtracted_B) {
       *vbuf_out = vbuf + offset_B;
-      return (size_B - subtracted_B) / stride_B;
+
+      /* If stride is zero, do not clamp, everything is valid. */
+      if (stride_B)
+         return ((size_B - subtracted_B) / stride_B);
+      else
+         return UINT32_MAX;
    } else {
       *vbuf_out = sink;
       return 0;