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venus: wsi workaround for gamescope

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Gamescope relies on legacy scanout support when explicit modifier isn't
available and it chains the mesa wsi hint requesting such. Venus doesn't
support legacy scanout with optimal tiling on its own, so venus disables
legacy scanout in favor of prime buffer blit for optimal performance. As
a workaround here, venus can once again force linear tiling when legacy
scanout is requested outside of common wsi.

Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35811>
This commit is contained in:
Yiwei Zhang
2025-06-28 17:01:47 -07:00
parent c5d1392a10
commit 3f1d40d230
1 changed files with 17 additions and 0 deletions
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src/virtio/vulkan/vn_wsi.c
+17
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@@ -132,6 +132,23 @@ vn_wsi_create_image(struct vn_device *dev,
create_info = &local_create_info;
}
/* Gamescope relies on legacy scanout support when explicit modifier isn't
* available and it chains the mesa wsi hint requesting such. Venus doesn't
* support legacy scanout with optimal tiling on its own, so venus disables
* legacy scanout in favor of prime buffer blit for optimal performance. As
* a workaround here, venus can once again force linear tiling when legacy
* scanout is requested outside of common wsi.
*/
if (wsi_info->scanout) {
if (create_info != &local_create_info) {
local_create_info = *create_info;
local_create_info.tiling = VK_IMAGE_TILING_LINEAR;
create_info = &local_create_info;
} else {
local_create_info.tiling = VK_IMAGE_TILING_LINEAR;
}
}
struct vn_image *img;
VkResult result = vn_image_create(dev, create_info, alloc, &img);
if (result != VK_SUCCESS)