diff options
| author | Nicolai Hähnle <[email protected]> | 2016-06-17 20:08:42 +0200 |
|---|---|---|
| committer | Nicolai Hähnle <[email protected]> | 2016-06-20 18:29:55 +0200 |
| commit | 1167905c41d4594153d6649c0cade96a83831cbd (patch) | |
| tree | fcbda64dd20a5c06a7875328f4e9dae2057eeb21 /src/gallium/drivers/radeonsi/si_state.c | |
| parent | 650137a9c8fb5ae4a214440ca3ebc43461e2d394 (diff) | |
radeonsi: use trapezoid distribution for tess on Fiji and Polaris
This yields a small performance improvement in Unigine Heaven.
Reviewed-by: Alex Deucher <[email protected]>
Reviewed-by: Marek Olšák <[email protected]>
Diffstat (limited to 'src/gallium/drivers/radeonsi/si_state.c')
| -rw-r--r-- | src/gallium/drivers/radeonsi/si_state.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/src/gallium/drivers/radeonsi/si_state.c b/src/gallium/drivers/radeonsi/si_state.c index 6be2f4be1f6..1cef1dc8750 100644 --- a/src/gallium/drivers/radeonsi/si_state.c +++ b/src/gallium/drivers/radeonsi/si_state.c @@ -3839,16 +3839,28 @@ static void si_init_config(struct si_context *sctx) } if (sctx->b.chip_class >= VI) { + unsigned vgt_tess_distribution; + si_pm4_set_reg(pm4, R_028424_CB_DCC_CONTROL, S_028424_OVERWRITE_COMBINER_MRT_SHARING_DISABLE(1) | S_028424_OVERWRITE_COMBINER_WATERMARK(4)); si_pm4_set_reg(pm4, R_028C58_VGT_VERTEX_REUSE_BLOCK_CNTL, 30); si_pm4_set_reg(pm4, R_028C5C_VGT_OUT_DEALLOC_CNTL, 32); - si_pm4_set_reg(pm4, R_028B50_VGT_TESS_DISTRIBUTION, - S_028B50_ACCUM_ISOLINE(32) | - S_028B50_ACCUM_TRI(11) | - S_028B50_ACCUM_QUAD(11) | - S_028B50_DONUT_SPLIT(16)); + + vgt_tess_distribution = + S_028B50_ACCUM_ISOLINE(32) | + S_028B50_ACCUM_TRI(11) | + S_028B50_ACCUM_QUAD(11) | + S_028B50_DONUT_SPLIT(16); + + /* Testing with Unigine Heaven extreme tesselation yielded best results + * with TRAP_SPLIT = 3. + */ + if (sctx->b.family == CHIP_FIJI || + sctx->b.family >= CHIP_POLARIS10) + vgt_tess_distribution |= S_028B50_TRAP_SPLIT(3); + + si_pm4_set_reg(pm4, R_028B50_VGT_TESS_DISTRIBUTION, vgt_tess_distribution); } if (sctx->b.family == CHIP_STONEY) |