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panfrost: Emit explicit REPLACE for disabled colour writeout

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Likewise zero for Bifrost. Avoids UB behaviour in next commit.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6476>
This commit is contained in:
Alyssa Rosenzweig 2020-08-26 09:44:12 -04:00 • committed by Marge Bot
parent 75a274de06
commit 87e35102dd
1 changed files with 12 additions and 3 deletions
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15
src/gallium/drivers/panfrost/pan_cmdstream.c
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@ -436,10 +436,18 @@ panfrost_emit_blend(struct panfrost_batch *batch, void *rts,
struct bifrost_blend_rt *brts = rts;
/* Disable blending for depth-only on Bifrost */
/* Disable blending for depth-only */
if (rt_count == 0 && dev->quirks & IS_BIFROST)
brts[0].unk2 = 0x3;
if (rt_count == 0) {
if (dev->quirks & IS_BIFROST) {
memset(brts, 0, sizeof(*brts));
brts[0].unk2 = 0x3;
} else {
pan_pack(rts, MIDGARD_BLEND_OPAQUE, cfg) {
cfg.equation = 0xf0122122; /* Replace */
}
}
}
for (unsigned i = 0; i < rt_count; ++i) {
struct mali_blend_flags_packed flags = {};
@ -461,6 +469,7 @@ panfrost_emit_blend(struct panfrost_batch *batch, void *rts,
}
if (dev->quirks & IS_BIFROST) {
memset(brts + i, 0, sizeof(brts[i]));
brts[i].flags = flags.opaque[0];
if (blend[i].is_shader) {