intel/isl: Add a drm_modifier_get_default_aux_state helper

Reviewed-by: Topi Pohjolainen <[email protected]>
Reviewed-by: Daniel Stone <[email protected]>
Reviewed-by: Chad Versace <[email protected]>

1 files changed, 20 insertions, 0 deletions

diff --git a/src/intel/isl/isl.h b/src/intel/isl/isl.h
index ca4556ffcff..df275f85c49 100644
--- a/src/intel/isl/isl.h
+++ b/src/intel/isl/isl.h
@@ -1558,6 +1558,26 @@ isl_drm_modifier_has_aux(uint64_t modifier)
    return isl_drm_modifier_get_info(modifier)->aux_usage != ISL_AUX_USAGE_NONE;
 }
 
+/** Returns the default isl_aux_state for the given modifier.
+ *
+ * All modified images are required to be kept out of the AUX_INVALID state
+ * but they may or may not actually be compressed and may or may not have
+ * clear color.  This function returns the worst case aux_state that we need
+ * to assume when getting a surface from another process or API.
+ */
+static inline enum isl_aux_state
+isl_drm_modifier_get_default_aux_state(uint64_t modifier)
+{
+   const struct isl_drm_modifier_info *mod_info =
+      isl_drm_modifier_get_info(modifier);
+
+   if (!mod_info || mod_info->aux_usage == ISL_AUX_USAGE_NONE)
+      return ISL_AUX_STATE_AUX_INVALID;
+
+   return mod_info->supports_clear_color ? ISL_AUX_STATE_COMPRESSED_CLEAR :
+                                           ISL_AUX_STATE_COMPRESSED_NO_CLEAR;
+}
+
 struct isl_extent2d ATTRIBUTE_CONST
 isl_get_interleaved_msaa_px_size_sa(uint32_t samples);