diff options
| -rw-r--r-- | src/gallium/drivers/radeonsi/si_state_draw.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/src/gallium/drivers/radeonsi/si_state_draw.c b/src/gallium/drivers/radeonsi/si_state_draw.c index d61374e95ca..b29135a1e68 100644 --- a/src/gallium/drivers/radeonsi/si_state_draw.c +++ b/src/gallium/drivers/radeonsi/si_state_draw.c @@ -165,10 +165,17 @@ static bool si_emit_derived_tess_state(struct si_context *sctx, (sctx->screen->tess_offchip_block_dw_size * 4) / output_patch_size); - /* Not necessary for correctness, but improves performance. The - * specific value is taken from the proprietary driver. + /* Not necessary for correctness, but improves performance. + * The hardware can do more, but the radeonsi shader constant is + * limited to 6 bits. */ - *num_patches = MIN2(*num_patches, 40); + *num_patches = MIN2(*num_patches, 63); /* triangles: 3 full waves except 3 lanes */ + + /* When distributed tessellation is unsupported, switch between SEs + * at a higher frequency to compensate for it. + */ + if (!sctx->screen->has_distributed_tess && sctx->screen->info.max_se > 1) + *num_patches = MIN2(*num_patches, 16); /* recommended */ /* Make sure that vector lanes are reasonably occupied. It probably * doesn't matter much because this is LS-HS, and TES is likely to |