Mesa (master): etnaviv: simplify transfer tiling handling

[Lucas Stach]

Module: Mesa
Branch: master
Commit: d4e6de9e385579d49cd5f51e643d0141c81b5604
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=d4e6de9e385579d49cd5f51e643d0141c81b5604

Author: Lucas Stach <l.stach at pengutronix.de>
Date:   Thu May 18 16:44:18 2017 +0200

etnaviv: simplify transfer tiling handling

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>
Reviewed-by: Wladimir J. van der Laan <laanwj at gmail.com>

---

 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 707029865a..8a18dbb8fc 100644
--- a/src/gallium/drivers/etnaviv/etnaviv_transfer.c
+++ b/src/gallium/drivers/etnaviv/etnaviv_transfer.c
@@ -89,21 +89,19 @@ 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);
          }
@@ -264,13 +262,6 @@ 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));
-
    /*
     * Pull resources into the CPU domain. Only skipped for unsynchronized
     * transfers without a temporary resource.
@@ -294,7 +285,7 @@ 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;
 
@@ -321,24 +312,21 @@ 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);
          }
       }