RFC: anv: Enable VK_EXT_image_drm_format_modifier

The draft spec lives at
http://kiwitree.net/~chadv/vulkan/#1.0-VK_EXT_image_drm_format_modifier.

This extension spec has a complete, working API. I'm happy with the API,
and believe it's good enough. But the spec language has some outstanding
issues that prevent it from being submitted as-is to Khronos: the spec
language needs more polish, and the appendix chaper has a list of
incomplete TODOs.

2 files changed, 11 insertions, 0 deletions

diff --git a/src/intel/vulkan/anv_extensions.py b/src/intel/vulkan/anv_extensions.py
index 83a93bdbf86..89957cce32e 100644
--- a/src/intel/vulkan/anv_extensions.py
+++ b/src/intel/vulkan/anv_extensions.py
@@ -87,6 +87,7 @@ EXTENSIONS = [
     Extension('VK_KHX_multiview',                         1, True),
     Extension('VK_EXT_debug_report',                      8, True),
     Extension('VK_EXT_external_memory_dma_buf',           1, True),
+    Extension('VK_EXT_image_drm_format_modifier',         1, True),
     Extension('VK_EXT_queue_family_foreign',              1, True),
 ]
 
diff --git a/src/intel/vulkan/anv_image.c b/src/intel/vulkan/anv_image.c
index bf636ce4b65..a289ac8f944 100644
--- a/src/intel/vulkan/anv_image.c
+++ b/src/intel/vulkan/anv_image.c
@@ -1552,3 +1552,13 @@ anv_image_get_surface_for_aspect_mask(const struct anv_image *image,
    uint32_t plane = anv_image_aspect_to_plane(image->aspects, sanitized_mask);
    return &image->planes[plane].surface;
 }
+
+VkResult
+anv_GetImageDrmFormatModifierEXT(VkDevice device_h,
+                                 VkImage image_h,
+                                 uint64_t *pDrmFormatModifier)
+{
+   ANV_FROM_HANDLE(anv_image, image, image_h);
+   *pDrmFormatModifier = image->drm_format_mod;
+   return VK_SUCCESS;
+}