From 166082f3c312a840bda04e2a781ce1cc865e3f4d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADctor=20Manuel=20J=C3=A1quez=20Leal?=
 <vjaquez@igalia.com>
Date: Wed, 28 Apr 2021 10:52:29 +0200
Subject: [PATCH] va: allocator: Disable derived for Gallium if RGB and
 reading.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2127>
---
 sys/va/gstvaallocator.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sys/va/gstvaallocator.c b/sys/va/gstvaallocator.c
index 8c756f79ba..78d89310f6 100644
--- a/sys/va/gstvaallocator.c
+++ b/sys/va/gstvaallocator.c
@@ -1271,6 +1271,12 @@ _va_map_unlocked (GstVaMemory * mem, GstMapFlags flags)
           || ((flags & GST_MAP_WRITE)
               && GST_VIDEO_INFO_IS_YUV (&va_allocator->derived_info)));
       break;
+    case GST_VA_IMPLEMENTATION_MESA_GALLIUM:
+      /* Reading RGB derived images, with non-standard resolutions,
+       * looks like tiled too. TODO(victor): fill a bug in Mesa. */
+      use_derived = va_allocator->use_derived && !((flags & GST_MAP_READ)
+          && GST_VIDEO_INFO_IS_RGB (&va_allocator->derived_info));
+      break;
     default:
       use_derived = va_allocator->use_derived;
       break;