Mesa (master): panfrost: Preload gl_FragCoord on Bifrost

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Module: Mesa
Branch: master
Commit: 20f6c7a9134062b6e16f7a5bd16c197cc2055e9b
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=20f6c7a9134062b6e16f7a5bd16c197cc2055e9b

Author: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Date:   Fri May 29 16:06:39 2020 -0400

panfrost: Preload gl_FragCoord on Bifrost

It's a precoloured register but we do need to specify in the cmdstream
that we want the preloading to happen.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5267>

---

 src/gallium/drivers/panfrost/pan_cmdstream.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/panfrost/pan_cmdstream.c b/src/gallium/drivers/panfrost/pan_cmdstream.c
index 0a3bbc97688..14d013f08c9 100644
--- a/src/gallium/drivers/panfrost/pan_cmdstream.c
+++ b/src/gallium/drivers/panfrost/pan_cmdstream.c
@@ -338,8 +338,11 @@ panfrost_shader_meta_init(struct panfrost_context *ctx,
                 meta->bifrost1.uniform_buffer_count = panfrost_ubo_count(ctx, st);
                 if (st == PIPE_SHADER_VERTEX)
                         meta->bifrost2.preload_regs = 0xC0;
-                else
+                else {
                         meta->bifrost2.preload_regs = 0x1;
+                        SET_BIT(meta->bifrost2.preload_regs, 0x10, ss->reads_frag_coord);
+                }
+
                 meta->bifrost2.uniform_count = MIN2(ss->uniform_count,
                                                     ss->uniform_cutoff);
         } else {