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panfrost: Avoid integer underflow in rt_count_1

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If rt_count = 0, this underflows to MAX_MRT. The hw doesn't seem to care
but it's semantically incorrect and confuses pandecode.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5858>
This commit is contained in:
Alyssa Rosenzweig 2020-07-14 17:08:54 -04:00 • committed by Marge Bot
parent 77bb19eebd
commit 9addb82148
1 changed files with 1 additions and 1 deletions
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2
src/gallium/drivers/panfrost/pan_mfbd.c
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@ -482,7 +482,7 @@ panfrost_emit_mfbd(struct panfrost_batch *batch, unsigned vertex_count)
/* Seems to configure tib size */
.unk1 = pan_is_large_tib(batch) ? 0xc80 : 0x1080,
.rt_count_1 = MALI_POSITIVE(batch->key.nr_cbufs),
.rt_count_1 = MALI_POSITIVE(MAX2(batch->key.nr_cbufs, 1)),
.rt_count_2 = 4,
};