panfrost: Disable point sprites on Bifrost

It doesn't look like the lowering in !6473 will land before the branch
point. Let's nop out point sprites in the backend to avoid MMU faults
from creating invalid Midgard-style varyings.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7408>

diff --git a/src/gallium/drivers/panfrost/pan_cmdstream.c b/src/gallium/drivers/panfrost/pan_cmdstream.c
index 645047f..0653db3 100644 (file)
--- a/src/gallium/drivers/panfrost/pan_cmdstream.c
+++ b/src/gallium/drivers/panfrost/pan_cmdstream.c
@@ -1720,6 +1720,11 @@ panfrost_emit_varying_descriptor(struct panfrost_batch *batch,
 
         struct pipe_stream_output_info *so = &vs->stream_output;
         uint16_t point_coord_mask = ctx->rasterizer->base.sprite_coord_enable;
+
+        /* TODO: point sprites need lowering on Bifrost */
+        if (dev->quirks & IS_BIFROST)
+                point_coord_mask =  0;
+
         unsigned present = pan_varying_present(vs, fs, dev->quirks, point_coord_mask);
 
         /* Check if this varying is linked by us. This is the case for