From ff84c07b21cd230c78d264728cab6ccd2ee7613f Mon Sep 17 00:00:00 2001
From: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Date: Sat, 2 Apr 2022 15:12:51 -0400
Subject: [PATCH] asahi: Identify depth bias array

"Inspired" by PowerVR code, by comparison.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16512>
---
 src/asahi/lib/cmdbuf.xml          | 3 +--
 src/gallium/drivers/asahi/magic.c | 3 +--
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/asahi/lib/cmdbuf.xml b/src/asahi/lib/cmdbuf.xml
index 0a4aa43fd3f..68a0ea38200 100644
--- a/src/asahi/lib/cmdbuf.xml
+++ b/src/asahi/lib/cmdbuf.xml
@@ -576,8 +576,7 @@
     <field name="Store pipeline unk" start="12:0" size="4" default="4" type="hex"/>
     <field name="Store pipeline" start="12:4" size="28" type="address" modifier="shr(4)"/>
     <field name="Scissor array" start="14:0" size="64" type="address"/>
-    <!-- Points to zeroes, allocation of 0xc0000 bytes unknwon type 28000000 -->
-    <field name="Unknown buffer" start="16:0" size="64" type="address"/>
+    <field name="Depth bias array" start="16:0" size="64" type="address"/>
     <!-- 0xc0154 with depth clear and z32f and s8
          0x40154 with z32f and s8
          0x44 with z32f
diff --git a/src/gallium/drivers/asahi/magic.c b/src/gallium/drivers/asahi/magic.c
index 3e1e07b6d58..a0d1cfb41b8 100644
--- a/src/gallium/drivers/asahi/magic.c
+++ b/src/gallium/drivers/asahi/magic.c
@@ -176,7 +176,6 @@ demo_cmdbuf(uint64_t *buf, size_t size,
    uint64_t deflake_1 = deflake_buffer + 0x2a0;
    uint64_t deflake_2 = deflake_buffer + 0x20;
 
-   uint64_t unk_buffer = demo_zero(pool, 0x1000);
    uint64_t unk_buffer_2 = demo_zero(pool, 0x8000);
 
    uint64_t depth_buffer = 0;
@@ -188,7 +187,7 @@ demo_cmdbuf(uint64_t *buf, size_t size,
       cfg.store_pipeline_bind = 0x12;
       cfg.store_pipeline = pipeline_store;
       cfg.scissor_array = scissor_ptr;
-      cfg.unknown_buffer = unk_buffer;
+      cfg.depth_bias_array = demo_zero(pool, 0x1000);
 
       if (framebuffer->zsbuf) {
          struct pipe_surface *zsbuf = framebuffer->zsbuf;