Mesa (main): panfrost: Disable QUADS on Valhall

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Module: Mesa
Branch: main
Commit: e9190c45d59695f64daf82a7ded0179851cfc397
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=e9190c45d59695f64daf82a7ded0179851cfc397

Author: Alyssa Rosenzweig <alyssa at collabora.com>
Date:   Wed Jun 15 15:56:24 2022 -0400

panfrost: Disable QUADS on Valhall

Even with the fixes in the rest of the series, arb-provoking-vertex-render is
still failing on Valhall for a single subcase (involving QUADS). It seems likely
that QUADS support is broken on Valhall, given it's not used in any of the APIs
for which Arm ships drivers.

Signed-off-by: Alyssa Rosenzweig <alyssa at collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17068>

---

 src/gallium/drivers/panfrost/pan_screen.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/gallium/drivers/panfrost/pan_screen.c b/src/gallium/drivers/panfrost/pan_screen.c
index 72698843c8e..b7cc255645c 100644
--- a/src/gallium/drivers/panfrost/pan_screen.c
+++ b/src/gallium/drivers/panfrost/pan_screen.c
@@ -325,6 +325,14 @@ panfrost_get_param(struct pipe_screen *screen, enum pipe_cap param)
                         modes |= BITFIELD_BIT(PIPE_PRIM_POLYGON);
                 }
 
+                if (dev->arch >= 9) {
+                        /* Although Valhall is supposed to support quads, they
+                         * don't seem to work correctly. Disable to fix
+                         * arb-provoking-vertex-render.
+                         */
+                        modes &= ~BITFIELD_BIT(PIPE_PRIM_QUADS);
+                }
+
                 return modes;
         }