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radeon: use SAMPLE_SPLIT=2 for better MSAA perf on EG/CM 

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
main
Marek Olšák 2016-05-26 14:33:12 +02:00
parent 09bfd5c716
commit 625d1810ad
1 changed files with 4 additions and 2 deletions
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6
radeon/radeon_surface.c
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@ -957,8 +957,10 @@ static int eg_surface_best(struct radeon_surface_manager *surf_man,
}
surf->stencil_tile_split = 64;
} else {
/* tile split must be >= 256 for colorbuffer surfaces */
surf->tile_split = MAX2(surf->nsamples * surf->bpe * 64, 256);
/* tile split must be >= 256 for colorbuffer surfaces,
* SAMPLE_SPLIT = tile_split / (bpe * 64), the optimal value is 2
*/
surf->tile_split = MAX2(2 * surf->bpe * 64, 256);
if (surf->tile_split > 4096)
surf->tile_split = 4096;
}