vulkan/util: Add a helper to get a version override

Reviewed-by: Samuel Iglesias Gonsálvez <[email protected]>

2 files changed, 22 insertions, 0 deletions

diff --git a/src/vulkan/util/vk_util.c b/src/vulkan/util/vk_util.c
index 769e69062ad..ec95a89078a 100644
--- a/src/vulkan/util/vk_util.c
+++ b/src/vulkan/util/vk_util.c
@@ -47,3 +47,23 @@ uint32_t vk_get_driver_version(void)
    }
    return VK_MAKE_VERSION(major, minor, patch);
 }
+
+uint32_t vk_get_version_override(void)
+{
+   const char *str = getenv("MESA_VK_VERSION_OVERRIDE");
+   if (str == NULL)
+      return 0;
+
+   const char *minor_str = strchr(str, '.');
+   const char *patch_str = minor_str ? strchr(minor_str + 1, '.') : NULL;
+
+   int major = atoi(str);
+   int minor = minor_str ? atoi(minor_str + 1) : 0;
+   int patch = patch_str ? atoi(patch_str + 1) : 0;
+
+   /* Do some basic version sanity checking */
+   if (major < 1 || minor < 0 || patch < 0 || minor > 1023 || patch > 4095)
+      return 0;
+
+   return VK_MAKE_VERSION(major, minor, patch);
+}
diff --git a/src/vulkan/util/vk_util.h b/src/vulkan/util/vk_util.h
index 4c18a196b71..cc6a36e5acc 100644
--- a/src/vulkan/util/vk_util.h
+++ b/src/vulkan/util/vk_util.h
@@ -199,6 +199,8 @@ __vk_find_struct(void *start, VkStructureType sType)
 
 uint32_t vk_get_driver_version(void);
 
+uint32_t vk_get_version_override(void);
+
 #define VK_EXT_OFFSET (1000000000UL)
 #define VK_ENUM_EXTENSION(__enum) \
    ((__enum) >= VK_EXT_OFFSET ? ((((__enum) - VK_EXT_OFFSET) / 1000UL) + 1) : 0)