[Mesa-dev] [PATCH 20/27] i965/miptree: Refactor ISL aux usage resolver

[Topi Pohjolainen]

Signed-off-by: Topi Pohjolainen <topi.pohjolainen at intel.com>
---
 src/mesa/drivers/dri/i965/brw_blorp.c            |  4 +-
 src/mesa/drivers/dri/i965/brw_wm_surface_state.c |  3 +-
 src/mesa/drivers/dri/i965/intel_mipmap_tree.c    | 47 +++++++++++++++---------
 src/mesa/drivers/dri/i965/intel_mipmap_tree.h    |  9 ++++-
 4 files changed, 41 insertions(+), 22 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_blorp.c b/src/mesa/drivers/dri/i965/brw_blorp.c
index 72ead04..e6bb120 100644
--- a/src/mesa/drivers/dri/i965/brw_blorp.c
+++ b/src/mesa/drivers/dri/i965/brw_blorp.c
@@ -170,8 +170,10 @@ blorp_surf_for_miptree(struct brw_context *brw,
       *level = 0;
    }
 
+   surf->aux_usage = intel_miptree_get_aux_isl_usage(brw, mt);
+
    struct isl_surf *aux_surf = &tmp_surfs[1];
-   intel_miptree_get_aux_isl_surf(brw, mt, aux_surf, &surf->aux_usage);
+   intel_miptree_get_aux_isl_surf(brw, mt, surf->aux_usage, aux_surf);
 
    if (surf->aux_usage != ISL_AUX_USAGE_NONE) {
       if (surf->aux_usage == ISL_AUX_USAGE_HIZ) {
diff --git a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
index 4566696..ef7347c 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
@@ -139,7 +139,8 @@ brw_emit_surface_state(struct brw_context *brw,
    enum isl_aux_usage aux_usage = ISL_AUX_USAGE_NONE;
    if ((mt->mcs_buf || intel_miptree_sample_with_hiz(brw, mt)) &&
        !(flags & INTEL_AUX_BUFFER_DISABLED)) {
-      intel_miptree_get_aux_isl_surf(brw, mt, &aux_surf_s, &aux_usage);
+      aux_usage = intel_miptree_get_aux_isl_usage(brw, mt);
+      intel_miptree_get_aux_isl_surf(brw, mt, aux_usage, &aux_surf_s);
       aux_surf = &aux_surf_s;
 
       if (mt->mcs_buf) {
diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
index cdfd49d..8643ef8 100644
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
@@ -3421,6 +3421,32 @@ intel_miptree_get_isl_surf(struct brw_context *brw,
       surf->usage |= ISL_SURF_USAGE_CUBE_BIT;
 }
 
+enum isl_aux_usage
+intel_miptree_get_aux_isl_usage(const struct brw_context *brw,
+                                const struct intel_mipmap_tree *mt)
+{
+   if (mt->hiz_buf)
+      return ISL_AUX_USAGE_HIZ;
+
+   if (!mt->mcs_buf)
+      return ISL_AUX_USAGE_NONE;
+
+   if (mt->num_samples > 1) {
+      assert(mt->msaa_layout == INTEL_MSAA_LAYOUT_CMS);
+      return ISL_AUX_USAGE_MCS;
+   }
+
+   if (intel_miptree_is_lossless_compressed(brw, mt)) {
+      assert(brw->gen >= 9);
+      return ISL_AUX_USAGE_CCS_E;
+   }
+
+   if ((mt->aux_disable & INTEL_AUX_DISABLE_CCS) == 0)
+      return ISL_AUX_USAGE_CCS_D;
+
+   unreachable("Invalid MCS miptree");
+}
+
 /* WARNING: THE SURFACE CREATED BY THIS FUNCTION IS NOT COMPLETE AND CANNOT BE
  * USED FOR ANY REAL CALCULATIONS.  THE ONLY VALID USE OF SUCH A SURFACE IS TO
  * PASS IT INTO isl_surf_fill_state.
@@ -3428,32 +3454,17 @@ intel_miptree_get_isl_surf(struct brw_context *brw,
 void
 intel_miptree_get_aux_isl_surf(struct brw_context *brw,
                                const struct intel_mipmap_tree *mt,
-                               struct isl_surf *surf,
-                               enum isl_aux_usage *usage)
+                               enum isl_aux_usage usage,
+                               struct isl_surf *surf)
 {
    uint32_t aux_pitch, aux_qpitch;
    if (mt->mcs_buf) {
       aux_pitch = mt->mcs_buf->pitch;
       aux_qpitch = mt->mcs_buf->qpitch;
-
-      if (mt->num_samples > 1) {
-         assert(mt->msaa_layout == INTEL_MSAA_LAYOUT_CMS);
-         *usage = ISL_AUX_USAGE_MCS;
-      } else if (intel_miptree_is_lossless_compressed(brw, mt)) {
-         assert(brw->gen >= 9);
-         *usage = ISL_AUX_USAGE_CCS_E;
-      } else if ((mt->aux_disable & INTEL_AUX_DISABLE_CCS) == 0) {
-         *usage = ISL_AUX_USAGE_CCS_D;
-      } else {
-         unreachable("Invalid MCS miptree");
-      }
    } else if (mt->hiz_buf) {
       aux_pitch = mt->hiz_buf->aux_base.pitch;
       aux_qpitch = mt->hiz_buf->aux_base.qpitch;
-
-      *usage = ISL_AUX_USAGE_HIZ;
    } else {
-      *usage = ISL_AUX_USAGE_NONE;
       return;
    }
 
@@ -3461,7 +3472,7 @@ intel_miptree_get_aux_isl_surf(struct brw_context *brw,
    intel_miptree_get_isl_surf(brw, mt, surf);
 
    /* Figure out the format and tiling of the auxiliary surface */
-   switch (*usage) {
+   switch (usage) {
    case ISL_AUX_USAGE_NONE:
       unreachable("Invalid auxiliary usage");
 
diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.h b/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
index 4c428cb..f3c8268 100644
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
@@ -786,11 +786,16 @@ void
 intel_miptree_get_isl_surf(struct brw_context *brw,
                            const struct intel_mipmap_tree *mt,
                            struct isl_surf *surf);
+
+enum isl_aux_usage
+intel_miptree_get_aux_isl_usage(const struct brw_context *brw,
+                                const struct intel_mipmap_tree *mt);
+
 void
 intel_miptree_get_aux_isl_surf(struct brw_context *brw,
                                const struct intel_mipmap_tree *mt,
-                               struct isl_surf *surf,
-                               enum isl_aux_usage *usage);
+                               enum isl_aux_usage usage,
+                               struct isl_surf *surf);
 
 union isl_color_value
 intel_miptree_get_isl_clear_color(struct brw_context *brw,
-- 
2.5.5