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radeon: tweak TILE_SPLIT for MSAA surfaces 

Reviewed-by: Jerome Glisse <jglisse@redhat.com>
main
Marek Olšák 2012-08-07 23:38:19 +02:00
parent e14aedce64
commit 128803a107
1 changed files with 31 additions and 6 deletions
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33
radeon/radeon_surface.c
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@ -871,12 +871,37 @@ static int eg_surface_best(struct radeon_surface_manager *surf_man,
return 0;
}
/* set tile split to row size, optimize latter for multi-sample surface
* tile split >= 256 for render buffer surface. Also depth surface want
* smaller value for optimal performances.
*/
/* Tweak TILE_SPLIT for performance here. */
if (surf->nsamples > 1) {
if (surf->flags & (RADEON_SURF_ZBUFFER | RADEON_SURF_SBUFFER)) {
switch (surf->nsamples) {
case 2:
surf->tile_split = 128;
break;
case 4:
surf->tile_split = 128;
break;
case 8:
surf->tile_split = 256;
break;
case 16: /* cayman only */
surf->tile_split = 512;
break;
default:
fprintf(stderr, "radeon: Wrong number of samples %i (%i)\n",
surf->nsamples, __LINE__);
return -EINVAL;
}
surf->stencil_tile_split = 64;
} else {
/* tile split must be >= 256 for colorbuffer surfaces */
surf->tile_split = MAX2(surf->nsamples * surf->bpe * 64, 256);
}
} else {
/* set tile split to row size */
surf->tile_split = surf_man->hw_info.row_size;
surf->stencil_tile_split = surf_man->hw_info.row_size / 2;
}
/* bankw or bankh greater than 1 increase alignment requirement, not
* sure if it's worth using smaller bankw & bankh to stick with 2D