aboutsummaryrefslogtreecommitdiffstats
path: root/src/gallium
diff options
context:
space:
mode:
authorMarek Olšák <[email protected]>2016-11-29 20:41:23 +0100
committerMarek Olšák <[email protected]>2016-12-01 02:16:51 +0100
commit78c4528ae7709fbe94d917d034cfd60535b5dcf3 (patch)
tree01a74f8372b28033b58628911fb3b57673a035dc /src/gallium
parent72e46c98896d0cb13fc7d70b7a4193a84d72a5fc (diff)
radeonsi: apply a tessellation bug workaround for SI
Cc: 13.0 <[email protected]> Reviewed-by: Nicolai Hähnle <[email protected]>
Diffstat (limited to 'src/gallium')
-rw-r--r--src/gallium/drivers/radeonsi/si_state_draw.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/gallium/drivers/radeonsi/si_state_draw.c b/src/gallium/drivers/radeonsi/si_state_draw.c
index 10073ef9d74..cba5a03bebe 100644
--- a/src/gallium/drivers/radeonsi/si_state_draw.c
+++ b/src/gallium/drivers/radeonsi/si_state_draw.c
@@ -166,6 +166,13 @@ static void si_emit_derived_tess_state(struct si_context *sctx,
* specific value is taken from the proprietary driver.
*/
*num_patches = MIN2(*num_patches, 40);
+
+ /* SI bug workaround - limit LS-HS threadgroups to only one wave. */
+ if (sctx->b.chip_class == SI) {
+ unsigned one_wave = 64 / MAX2(num_tcs_input_cp, num_tcs_output_cp);
+ *num_patches = MIN2(*num_patches, one_wave);
+ }
+
sctx->last_num_patches = *num_patches;
output_patch0_offset = input_patch_size * *num_patches;