isl: Make public the list of modifiers

This allows Vulkan and GL to iterate over the full list of modifiers
instead of hard-coding in various places the "same" list as isl.

(Anvil's list has already diverged from isl's list. It omits Gen12
modifiers).

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/intel/isl/isl.h

@@ -1848,6 +1848,13 @@ isl_aux_state_has_valid_aux(enum isl_aux_state state)
    return state != ISL_AUX_STATE_AUX_INVALID;
 }
 
+extern const struct isl_drm_modifier_info isl_drm_modifier_info_list[];
+
+#define isl_drm_modifier_info_for_each(__info) \
+   for (const struct isl_drm_modifier_info *__info = isl_drm_modifier_info_list; \
+        __info->modifier != DRM_FORMAT_MOD_INVALID; \
+        ++__info)
+
 const struct isl_drm_modifier_info * ATTRIBUTE_CONST
 isl_drm_modifier_get_info(uint64_t modifier);
 

src/intel/isl/isl_drm.c

@@ -73,7 +73,9 @@ isl_tiling_from_i915_tiling(uint32_t tiling)
    unreachable("Invalid i915 tiling");
 }
 
-static const struct isl_drm_modifier_info modifier_info[] = {
+/** Sentinel is DRM_FORMAT_MOD_INVALID. */
+const struct isl_drm_modifier_info
+isl_drm_modifier_info_list[] = {
    {
       .modifier = DRM_FORMAT_MOD_NONE,
       .name = "DRM_FORMAT_MOD_NONE",
@@ -110,14 +112,17 @@ static const struct isl_drm_modifier_info modifier_info[] = {
       .aux_usage = ISL_AUX_USAGE_MC,
       .supports_clear_color = false,
    },
+   {
+      .modifier = DRM_FORMAT_MOD_INVALID,
+   },
 };
 
 const struct isl_drm_modifier_info *
 isl_drm_modifier_get_info(uint64_t modifier)
 {
-   for (unsigned i = 0; i < ARRAY_SIZE(modifier_info); i++) {
-      if (modifier_info[i].modifier == modifier)
-         return &modifier_info[i];
+   isl_drm_modifier_info_for_each(info) {
+      if (info->modifier == modifier)
+         return info;
    }
 
    return NULL;