From 8fb130033378c1aead13bf76b850d52e682d6435 Mon Sep 17 00:00:00 2001
From: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Date: Wed, 2 Jun 2021 07:05:35 -0400
Subject: [PATCH] zink: explicitly advertise index buffer format support
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Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11132>
---
 src/gallium/drivers/zink/zink_screen.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/gallium/drivers/zink/zink_screen.c b/src/gallium/drivers/zink/zink_screen.c
index 2eb9cfbcd25..548c8d56dcd 100644
--- a/src/gallium/drivers/zink/zink_screen.c
+++ b/src/gallium/drivers/zink/zink_screen.c
@@ -827,6 +827,13 @@ zink_is_format_supported(struct pipe_screen *pscreen,
       return screen->info.props.limits.framebufferNoAttachmentsSampleCounts &
              vk_sample_count_flags(sample_count);
 
+   if (bind & PIPE_BIND_INDEX_BUFFER) {
+      if (format != PIPE_FORMAT_R8_UINT &&
+          format != PIPE_FORMAT_R16_UINT &&
+          format != PIPE_FORMAT_R32_UINT)
+         return false;
+   }
+
    VkFormat vkformat = zink_get_format(screen, format);
    if (vkformat == VK_FORMAT_UNDEFINED)
       return false;