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radv: fix handling ViewportIndex with GPL

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When the fragment shader reads the viewport index as input and the last
pre-rasterization stage doesn't export it, it should be implicitly
zero (ie. first viewport). When the next stage is known, it's already
lowered in NIR, but with GPL we can't because we don't know if the FS
reads it. To fix this use AC_EXP_PARAM_DEFAULT_VAL_000.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18699>
This commit is contained in:
Samuel Pitoiset 2022-09-20 11:40:35 +02:00 • committed by Marge Bot
parent 515847b2a7
commit 630bb53e68
1 changed files with 2 additions and 2 deletions
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4
src/amd/vulkan/radv_pipeline.c
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@ -5456,7 +5456,7 @@ radv_pipeline_emit_ps_inputs(struct radeon_cmdbuf *ctx_cs,
if (ps->info.ps.viewport_index_input && !mesh)
single_slot_to_ps_input(outinfo, VARYING_SLOT_VIEWPORT, ps_input_cntl, &ps_offset,
false, false, true);
false, true, true);
if (ps->info.ps.has_pcoord)
ps_input_cntl[ps_offset++] = S_028644_PT_SPRITE_TEX(1) | S_028644_OFFSET(0x20);
@ -5485,7 +5485,7 @@ radv_pipeline_emit_ps_inputs(struct radeon_cmdbuf *ctx_cs,
if (ps->info.ps.viewport_index_input && mesh)
single_slot_to_ps_input(outinfo, VARYING_SLOT_VIEWPORT, ps_input_cntl, &ps_offset,
false, false, false);
false, true, false);
input_mask_to_ps_inputs(outinfo, ps, ps->info.ps.input_per_primitive_mask,
ps_input_cntl, &ps_offset);