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agx: Write sample mask even with no colour output

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Needed for discard to work properly, which has visible side effects with
occlusion queries. Fixes no_attachment framebuffers together with the next
commit.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21267>
This commit is contained in:
Alyssa Rosenzweig 2023-02-09 14:48:47 -05:00 • committed by Marge Bot
parent e785ae6125
commit 2c2f189fe7
1 changed files with 18 additions and 11 deletions
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29
src/asahi/compiler/agx_compile.c
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@ -432,18 +432,9 @@ agx_emit_store_vary(agx_builder *b, nir_intrinsic_instr *instr)
agx_src_index(&instr->src[0]));
}
static agx_instr *
agx_emit_local_store_pixel(agx_builder *b, nir_intrinsic_instr *instr)
static void
agx_write_sample_mask_1(agx_builder *b)
{
/* TODO: Reverse-engineer interactions with MRT */
if (b->shader->key->fs.ignore_tib_dependencies) {
assert(b->shader->nir->info.internal && "only for clear shaders");
} else if (b->shader->did_writeout) {
agx_writeout(b, 0x0004);
} else {
agx_writeout(b, 0x000C);
}
if (b->shader->nir->info.fs.uses_discard && !b->shader->did_sample_mask) {
/* If the shader uses discard, the sample mask must be written by the
* shader on all exeuction paths. If we've reached the end of the shader,
@ -458,6 +449,21 @@ agx_emit_local_store_pixel(agx_builder *b, nir_intrinsic_instr *instr)
BITFIELD64_BIT(FRAG_RESULT_STENCIL))) &&
"incompatible");
}
}
static agx_instr *
agx_emit_local_store_pixel(agx_builder *b, nir_intrinsic_instr *instr)
{
/* TODO: Reverse-engineer interactions with MRT */
if (b->shader->key->fs.ignore_tib_dependencies) {
assert(b->shader->nir->info.internal && "only for clear shaders");
} else if (b->shader->did_writeout) {
agx_writeout(b, 0x0004);
} else {
agx_writeout(b, 0x000C);
}
agx_write_sample_mask_1(b);
/* Compact the registers according to the mask */
agx_index compacted[4] = {agx_null()};
@ -1906,6 +1912,7 @@ agx_compile_function_nir(nir_shader *nir, nir_function_impl *impl,
*/
agx_block *last_block = list_last_entry(&ctx->blocks, agx_block, link);
agx_builder _b = agx_init_builder(ctx, agx_after_block(last_block));
agx_write_sample_mask_1(&_b);
agx_logical_end(&_b);
agx_stop(&_b);