From 1cdcf45ac82e6a488bfc8de004943e93051b91d6 Mon Sep 17 00:00:00 2001
From: Lucas Stach <l.stach@pengutronix.de>
Date: Thu, 13 Oct 2022 23:01:35 +0200
Subject: [PATCH] etnaviv: set LOGIC_OP_UNK24 for MSAA rendering on SMALL_MSAA
 GPUs

Fixes MSAA corruptions on GC3000. 0x4 seems to be enough to fix the
misrendering, but blob seems to always emit 0x5.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19066>
---
 src/gallium/drivers/etnaviv/etnaviv_state.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/gallium/drivers/etnaviv/etnaviv_state.c b/src/gallium/drivers/etnaviv/etnaviv_state.c
index 6bc836459eb..856608dafd3 100644
--- a/src/gallium/drivers/etnaviv/etnaviv_state.c
+++ b/src/gallium/drivers/etnaviv/etnaviv_state.c
@@ -361,6 +361,8 @@ etna_set_framebuffer_state(struct pipe_context *pctx,
       cs->RA_CENTROID_TABLE[9] = 0x886688a2;
       cs->RA_CENTROID_TABLE[10] = 0x888866aa;
       cs->RA_CENTROID_TABLE[11] = 0x668888a6;
+      if (VIV_FEATURE(screen, chipMinorFeatures4, SMALL_MSAA))
+         pe_logic_op |= VIVS_PE_LOGIC_OP_UNK24(0x5);
       break;
    }