From 166823bfd26ff7e9b88099598305967336525716 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Marek=20Ol=C5=A1=C3=A1k?= Date: Wed, 16 Aug 2017 00:54:45 +0200 Subject: [PATCH] radeonsi/gfx9: add a temporary workaround for a tessellation driver bug MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The workaround will do for now. The root cause is still unknown. This fixes new piglit: 16in-1out Cc: 17.1 17.2 Reviewed-by: Nicolai Hähnle --- src/gallium/drivers/radeonsi/si_state_draw.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/src/gallium/drivers/radeonsi/si_state_draw.c b/src/gallium/drivers/radeonsi/si_state_draw.c index 9631f18..cb9bbd2 100644 --- a/src/gallium/drivers/radeonsi/si_state_draw.c +++ b/src/gallium/drivers/radeonsi/si_state_draw.c @@ -195,7 +195,11 @@ static void si_emit_derived_tess_state(struct si_context *sctx, */ *num_patches = MIN2(*num_patches, 40); - if (sctx->b.chip_class == SI) { + if (sctx->b.chip_class == SI || + /* TODO: fix GFX9 where a threadgroup contains more than 1 wave and + * LS vertices per patch > HS vertices per patch. Piglit: 16in-1out */ + (sctx->b.chip_class == GFX9 && + num_tcs_input_cp > num_tcs_output_cp)) { /* SI bug workaround, related to power management. Limit LS-HS * threadgroups to only one wave. */ -- 2.7.4