From 1e39c21c2362dbeadf4e4e5f147bed3e7bf26ea5 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Marek=20Ol=C5=A1=C3=A1k?= Date: Tue, 28 May 2019 19:52:53 -0400 Subject: [PATCH] radeonsi/gfx10: fix a possible hang with exp pos0 with done=0 and exec=0 Acked-by: Bas Nieuwenhuizen --- src/gallium/drivers/radeonsi/si_shader.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c index 2d022438841..7bc22fcfa4f 100644 --- a/src/gallium/drivers/radeonsi/si_shader.c +++ b/src/gallium/drivers/radeonsi/si_shader.c @@ -3021,6 +3021,14 @@ void si_llvm_export_vs(struct si_shader_context *ctx, if (pos_args[i].out[0]) shader->info.nr_pos_exports++; + /* Navi10-14 skip POS0 exports if EXEC=0 and DONE=0, causing a hang. + * Setting valid_mask=1 prevents it and has no other effect. + */ + if (ctx->screen->info.family == CHIP_NAVI10 || + ctx->screen->info.family == CHIP_NAVI12 || + ctx->screen->info.family == CHIP_NAVI14) + pos_args[0].valid_mask = 1; + pos_idx = 0; for (i = 0; i < 4; i++) { if (!pos_args[i].out[0]) -- 2.30.2