[Mesa-dev] [PATCH 1/4] intel/isl: Add a drm_modifier_get_default_aux_state helper

[Jason Ekstrand]

---
 src/intel/isl/isl.h                           | 20 ++++++++++++++++++++
 src/mesa/drivers/dri/i965/intel_mipmap_tree.c |  3 +--
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/src/intel/isl/isl.h b/src/intel/isl/isl.h
index e77d7ee..d30b2de 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;
+}
+
 uint64_t ATTRIBUTE_CONST
 isl_drm_modifier_from_tiling(enum isl_tiling tiling,
                              enum isl_aux_usage aux_usage);
diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
index 79afdc5..bc04ad6 100644
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
@@ -1072,8 +1072,7 @@ intel_miptree_create_for_dri_image(struct brw_context *brw,
        * a worst case of compression.
        */
       enum isl_aux_state initial_state =
-         mod_info->supports_clear_color ? ISL_AUX_STATE_COMPRESSED_CLEAR :
-                                          ISL_AUX_STATE_COMPRESSED_NO_CLEAR;
+         isl_drm_modifier_get_default_aux_state(image->modifier);
 
       if (!create_ccs_buf_for_image(brw, image, mt, initial_state)) {
          intel_miptree_release(&mt);
-- 
2.5.0.400.gff86faf