From: Nicolai Hähnle <nicolai.haeh...@amd.com>
This yields a small performance improvement in Unigine Heaven.
---
src/gallium/drivers/radeonsi/si_state.c | 22 +++++++++++++++++-----
src/gallium/drivers/radeonsi/si_state_shaders.c | 10 +++++++---
2 files changed, 24 insertions(+), 8 deletions(-)
diff --git a/src/gallium/drivers/radeonsi/si_state.c
b/src/gallium/drivers/radeonsi/si_state.c
index 6be2f4b..1cef1dc 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)
diff --git a/src/gallium/drivers/radeonsi/si_state_shaders.c
b/src/gallium/drivers/radeonsi/si_state_shaders.c
index a7af76d..daef49d 100644
--- a/src/gallium/drivers/radeonsi/si_state_shaders.c
+++ b/src/gallium/drivers/radeonsi/si_state_shaders.c
@@ -300,9 +300,13 @@ static void si_set_tesseval_regs(struct si_screen *sscreen,
else
topology = V_028B6C_OUTPUT_TRIANGLE_CW;
- if (sscreen->b.chip_class >= VI)
- distribution_mode = V_028B6C_DISTRIBUTION_MODE_DONUTS;
- else
+ if (sscreen->b.chip_class >= VI) {
+ if (sscreen->b.family == CHIP_FIJI ||
+ sscreen->b.family >= CHIP_POLARIS10)
+ distribution_mode =
V_028B6C_DISTRIBUTION_MODE_TRAPEZOIDS;
+ else
+ distribution_mode = V_028B6C_DISTRIBUTION_MODE_DONUTS;
+ } else
distribution_mode = V_028B6C_DISTRIBUTION_MODE_NO_DIST;
si_pm4_set_reg(pm4, R_028B6C_VGT_TF_PARAM,
--
2.7.4
_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/mesa-dev
