Mesa (master): panfrost: Emit unlinked varyings

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Module: Mesa
Branch: master
Commit: 0c0217d945c558f0d21fcde2e761579e8b114433
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=0c0217d945c558f0d21fcde2e761579e8b114433

Author: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Date:   Mon Jun  8 13:45:17 2020 -0400

panfrost: Emit unlinked varyings

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5423>

---

 src/gallium/drivers/panfrost/pan_cmdstream.c | 30 ++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/src/gallium/drivers/panfrost/pan_cmdstream.c b/src/gallium/drivers/panfrost/pan_cmdstream.c
index 5eab2b1fd66..fa82844ff1b 100644
--- a/src/gallium/drivers/panfrost/pan_cmdstream.c
+++ b/src/gallium/drivers/panfrost/pan_cmdstream.c
@@ -1836,6 +1836,36 @@ pan_varying_present(
         return present;
 }
 
+/* Emitters for varying records */
+
+static struct mali_attr_meta
+pan_emit_vary(unsigned present, enum pan_special_varying buf,
+                unsigned quirks, enum mali_format format,
+                unsigned offset)
+{
+        unsigned nr_channels = MALI_EXTRACT_CHANNELS(format);
+
+        struct mali_attr_meta meta = {
+                .index = pan_varying_index(present, buf),
+                .unknown1 = quirks & IS_BIFROST ? 0x0 : 0x2,
+                .swizzle = quirks & HAS_SWIZZLES ?
+                        panfrost_get_default_swizzle(nr_channels) :
+                        panfrost_bifrost_swizzle(nr_channels),
+                .format = format,
+                .src_offset = offset
+        };
+
+        return meta;
+}
+
+/* General varying that is unused */
+
+static struct mali_attr_meta
+pan_emit_vary_only(unsigned present, unsigned quirks)
+{
+        return pan_emit_vary(present, 0, quirks, MALI_VARYING_DISCARD, 0);
+}
+
 void
 panfrost_emit_varying_descriptor(struct panfrost_batch *batch,
                                  unsigned vertex_count,