[Mesa-dev] [PATCH 5/6] etnaviv: simplify transfer tiling handling

[Lucas Stach]

There is no need to special case compressed resources, as they are already
marked as linear on allocation. With that out of the way, there is room to
cut down on the number of if clauses used.

Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
---
 src/gallium/drivers/etnaviv/etnaviv_transfer.c | 70 +++++++++++---------------
 1 file changed, 29 insertions(+), 41 deletions(-)

diff --git a/src/gallium/drivers/etnaviv/etnaviv_transfer.c b/src/gallium/drivers/etnaviv/etnaviv_transfer.c
index f7871f485371..05cdbc599956 100644
--- a/src/gallium/drivers/etnaviv/etnaviv_transfer.c
+++ b/src/gallium/drivers/etnaviv/etnaviv_transfer.c
@@ -85,21 +85,19 @@ etna_transfer_unmap(struct pipe_context *pctx, struct pipe_transfer *ptrans)
          struct etna_resource_level *res_level = &rsc->levels[ptrans->level];
          void *mapped = etna_bo_map(rsc->bo) + res_level->offset;
 
-         if (rsc->layout == ETNA_LAYOUT_LINEAR || rsc->layout == ETNA_LAYOUT_TILED) {
-            if (rsc->layout == ETNA_LAYOUT_TILED && !util_format_is_compressed(rsc->base.format)) {
-               etna_texture_tile(
-                  mapped + ptrans->box.z * res_level->layer_stride,
-                  trans->staging, ptrans->box.x, ptrans->box.y,
-                  res_level->stride, ptrans->box.width, ptrans->box.height,
-                  ptrans->stride, util_format_get_blocksize(rsc->base.format));
-            } else { /* non-tiled or compressed format */
-               util_copy_box(mapped, rsc->base.format, res_level->stride,
-                             res_level->layer_stride, ptrans->box.x,
-                             ptrans->box.y, ptrans->box.z, ptrans->box.width,
-                             ptrans->box.height, ptrans->box.depth,
-                             trans->staging, ptrans->stride,
-                             ptrans->layer_stride, 0, 0, 0 /* src x,y,z */);
-            }
+         if (rsc->layout == ETNA_LAYOUT_TILED) {
+            etna_texture_tile(
+               mapped + ptrans->box.z * res_level->layer_stride,
+               trans->staging, ptrans->box.x, ptrans->box.y,
+               res_level->stride, ptrans->box.width, ptrans->box.height,
+               ptrans->stride, util_format_get_blocksize(rsc->base.format));
+         } else if (rsc->layout == ETNA_LAYOUT_LINEAR) {
+            util_copy_box(mapped, rsc->base.format, res_level->stride,
+                          res_level->layer_stride, ptrans->box.x,
+                          ptrans->box.y, ptrans->box.z, ptrans->box.width,
+                          ptrans->box.height, ptrans->box.depth,
+                          trans->staging, ptrans->stride,
+                          ptrans->layer_stride, 0, 0, 0 /* src x,y,z */);
          } else {
             BUG("unsupported tiling %i", rsc->layout);
          }
@@ -255,13 +253,6 @@ etna_transfer_map(struct pipe_context *pctx, struct pipe_resource *prsc,
       PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE is set.
     */
 
-   /* No need to allocate a buffer for copying if the resource is not in use,
-    * and no tiling is needed, can just return a direct pointer.
-    */
-   bool in_place = rsc->layout == ETNA_LAYOUT_LINEAR ||
-                   (rsc->layout == ETNA_LAYOUT_TILED &&
-                    util_format_is_compressed(prsc->format));
-
    if (trans->rsc || !(usage & PIPE_TRANSFER_UNSYNCHRONIZED)) {
       uint32_t prep_flags = 0;
 
@@ -281,7 +272,7 @@ etna_transfer_map(struct pipe_context *pctx, struct pipe_resource *prsc,
 
    *out_transfer = ptrans;
 
-   if (in_place) {
+   if (rsc->layout == ETNA_LAYOUT_LINEAR) {
       ptrans->stride = res_level->stride;
       ptrans->layer_stride = res_level->layer_stride;
 
@@ -308,24 +299,21 @@ etna_transfer_map(struct pipe_context *pctx, struct pipe_resource *prsc,
          goto fail;
 
       if (usage & PIPE_TRANSFER_READ) {
-         /* untile or copy resource for reading */
-         if (rsc->layout == ETNA_LAYOUT_LINEAR || rsc->layout == ETNA_LAYOUT_TILED) {
-            if (rsc->layout == ETNA_LAYOUT_TILED && !util_format_is_compressed(rsc->base.format)) {
-               etna_texture_untile(trans->staging,
-                                   mapped + ptrans->box.z * res_level->layer_stride,
-                                   ptrans->box.x, ptrans->box.y, res_level->stride,
-                                   ptrans->box.width, ptrans->box.height, ptrans->stride,
-                                   util_format_get_blocksize(rsc->base.format));
-            } else { /* non-tiled or compressed format */
-               util_copy_box(trans->staging, rsc->base.format, ptrans->stride,
-                             ptrans->layer_stride, 0, 0, 0, /* dst x,y,z */
-                             ptrans->box.width, ptrans->box.height,
-                             ptrans->box.depth, mapped, res_level->stride,
-                             res_level->layer_stride, ptrans->box.x,
-                             ptrans->box.y, ptrans->box.z);
-            }
-         } else /* TODO supertiling */
-         {
+         if (rsc->layout == ETNA_LAYOUT_TILED) {
+            etna_texture_untile(trans->staging,
+                                mapped + ptrans->box.z * res_level->layer_stride,
+                                ptrans->box.x, ptrans->box.y, res_level->stride,
+                                ptrans->box.width, ptrans->box.height, ptrans->stride,
+                                util_format_get_blocksize(rsc->base.format));
+         } else if (rsc->layout == ETNA_LAYOUT_LINEAR) {
+            util_copy_box(trans->staging, rsc->base.format, ptrans->stride,
+                          ptrans->layer_stride, 0, 0, 0, /* dst x,y,z */
+                          ptrans->box.width, ptrans->box.height,
+                          ptrans->box.depth, mapped, res_level->stride,
+                          res_level->layer_stride, ptrans->box.x,
+                          ptrans->box.y, ptrans->box.z);
+         } else {
+            /* TODO supertiling */
             BUG("unsupported tiling %i for reading", rsc->layout);
          }
       }
-- 
2.11.0