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tu: Fix hangs for DS with no output

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Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5738>
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Connor Abbott 2020-07-22 23:52:50 +02:00 • committed by Marge Bot
parent 7ad962bf89
commit d6d75fcd91
1 changed files with 8 additions and 0 deletions
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8
src/freedreno/vulkan/tu_pipeline.c
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@ -847,6 +847,14 @@ tu6_emit_vpc(struct tu_cs *cs,
tu6_setup_streamout(cs, last_shader, &linkage);
/* The GPU hangs on some models when there are no outputs (xs_pack::CNT),
* at least when a DS is the last stage, so add a dummy output to keep it
* happy if there aren't any. We do this late in order to avoid emitting
* any unused code and make sure that optimizations don't remove it.
*/
if (linkage.cnt == 0)
ir3_link_add(&linkage, 0, 0x1, linkage.max_loc);
/* map outputs of the last shader to VPC */
assert(linkage.cnt <= 32);
const uint32_t sp_out_count = DIV_ROUND_UP(linkage.cnt, 2);