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gallium/radeon: don't disable DCC because of SDMA

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We want to keep DCC enabled to save bandwidth. It was a bad idea to disable
it here.

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
This commit is contained in:
Marek Olšák 2016-06-05 15:45:30 +02:00
parent 2fd74a05bb
commit c65361763c
1 changed files with 3 additions and 20 deletions
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23
src/gallium/drivers/radeon/r600_texture.c
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@ -32,8 +32,6 @@
#include <errno.h>
#include <inttypes.h>
static bool r600_texture_discard_dcc(struct r600_common_screen *rscreen,
struct r600_texture *rtex);
static void r600_texture_discard_cmask(struct r600_common_screen *rscreen,
struct r600_texture *rtex);
static unsigned r600_choose_tiling(struct r600_common_screen *rscreen,
@ -69,27 +67,12 @@ bool r600_prepare_for_dma_blit(struct r600_common_context *rctx,
/* DCC as:
* src: Use the 3D path. DCC decompression is expensive.
* dst: If overwriting the whole texture, discard DCC and use SDMA.
* Otherwise, use the 3D path.
* dst: Use the 3D path to compress the pixels with DCC.
*/
if (rsrc->dcc_offset && rsrc->surface.level[src_level].dcc_enabled)
if ((rsrc->dcc_offset && rsrc->surface.level[src_level].dcc_enabled) ||
(rdst->dcc_offset && rdst->surface.level[dst_level].dcc_enabled))
return false;
if (rdst->dcc_offset && rdst->surface.level[dst_level].dcc_enabled) {
/* We can't discard DCC if the texture has been exported.
* We can only discard DCC for the entire texture.
*/
if (rdst->resource.is_shared ||
rdst->resource.b.b.last_level > 0 ||
!util_texrange_covers_whole_level(&rdst->resource.b.b, dst_level,
dstx, dsty, dstz, src_box->width,
src_box->height, src_box->depth))
return false;
if (!r600_texture_discard_dcc(rctx->screen, rdst))
return false;
}
/* CMASK as:
* src: Both texture and SDMA paths need decompression. Use SDMA.
* dst: If overwriting the whole texture, discard CMASK and use