From 12edb83fb5cdf0c7969fdf6bf9f30c697fa4e8d4 Mon Sep 17 00:00:00 2001
From: Yiwei Zhang <zzyiwei@chromium.org>
Date: Fri, 14 Nov 2025 17:06:35 -0800
Subject: [PATCH] venus: add a wsi image log

This is helpful to tell which path is taken:
1. explicit modifier: legacy_scanout=0, prime_blit=0
2. prime blit: legacy_scanout=0, prime_blit=1
3. legacy scanout: legacy_scanout=1, prime_blit=0

To be noted, venus doesn't advertise legacy scanout support, but we
implicitly support it for gamescope compatibility.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38457>
---
 src/virtio/vulkan/vn_wsi.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/virtio/vulkan/vn_wsi.c b/src/virtio/vulkan/vn_wsi.c
index e275ffa1197..3ed031e5237 100644
--- a/src/virtio/vulkan/vn_wsi.c
+++ b/src/virtio/vulkan/vn_wsi.c
@@ -140,6 +140,10 @@ vn_wsi_create_image(struct vn_device *dev,
       return result;
 
    img->wsi.is_prime_blit_src = wsi_info->blit_src;
+   if (VN_DEBUG(WSI)) {
+      vn_log(dev->instance, "%s: legacy_scanout=%d, prime_blit=%d", __func__,
+             wsi_info->scanout, wsi_info->blit_src);
+   }
 
    *out_img = img;
    return VK_SUCCESS;