tests/edid: Test EDID CTA-861 parsing code

Parses a real-world EDID blob with CTA-861 EDID extension and compares
it to edid-decode output.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2351>

src/backends/edid.h

@@ -27,6 +27,8 @@
 
 #include <stdint.h>
 
+#include "core/util-private.h"
+
 typedef struct _MetaEdidInfo MetaEdidInfo;
 typedef struct _MetaEdidTiming MetaEdidTiming;
 typedef struct _MetaEdidDetailedTiming MetaEdidDetailedTiming;
@@ -230,6 +232,7 @@ struct _MetaEdidInfo
   MetaEdidHdrStaticMetadata hdr_static_metadata;
 };
 
+META_EXPORT_TEST
 MetaEdidInfo *meta_edid_info_new_parse (const uint8_t *data);
 
 #endif

src/tests/edid-tests.c

@@ -0,0 +1,79 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/*
+ * Copyright (C) 2022 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <glib.h>
+
+#include "backends/edid.h"
+
+/* GSM 23507, DisplayHDR certified */
+unsigned char edid_blob[] = {
+  0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x1e, 0x6d, 0xd3, 0x5b,
+  0xf4, 0xe7, 0x1d, 0x00, 0x02, 0x20, 0x01, 0x04, 0xb5, 0x46, 0x27, 0x78,
+  0x9d, 0x8c, 0xb5, 0xaf, 0x4f, 0x43, 0xab, 0x26, 0x0e, 0x50, 0x54, 0x21,
+  0x08, 0x00, 0xd1, 0xc0, 0x61, 0x40, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+  0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x09, 0xec, 0x00, 0xa0, 0xa0, 0xa0,
+  0x67, 0x50, 0x30, 0x20, 0x3a, 0x00, 0xb9, 0x88, 0x21, 0x00, 0x00, 0x1a,
+  0x00, 0x00, 0x00, 0xfd, 0x0c, 0x30, 0xa5, 0x03, 0x03, 0x46, 0x01, 0x0a,
+  0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x4c,
+  0x47, 0x20, 0x55, 0x4c, 0x54, 0x52, 0x41, 0x47, 0x45, 0x41, 0x52, 0x0a,
+  0x00, 0x00, 0x00, 0xff, 0x00, 0x32, 0x30, 0x32, 0x4d, 0x41, 0x50, 0x4e,
+  0x47, 0x59, 0x46, 0x32, 0x34, 0x0a, 0x02, 0x8d, 0x02, 0x03, 0x2d, 0x71,
+  0x23, 0x09, 0x06, 0x07, 0xe2, 0x00, 0x6a, 0xe3, 0x05, 0xc0, 0x00, 0xe6,
+  0x06, 0x05, 0x01, 0x61, 0x61, 0x4f, 0x48, 0x10, 0x04, 0x03, 0x01, 0x1f,
+  0x13, 0x3f, 0x40, 0x6d, 0x1a, 0x00, 0x00, 0x02, 0x05, 0x30, 0xa5, 0x00,
+  0x04, 0x61, 0x4f, 0x61, 0x4f, 0x56, 0x5e, 0x00, 0xa0, 0xa0, 0xa0, 0x29,
+  0x50, 0x30, 0x20, 0x35, 0x00, 0xb9, 0x88, 0x21, 0x00, 0x00, 0x1a, 0x5a,
+  0xa0, 0x00, 0xa0, 0xa0, 0xa0, 0x46, 0x50, 0x30, 0x20, 0x3a, 0x00, 0xb9,
+  0x88, 0x21, 0x00, 0x00, 0x00, 0x6f, 0xc2, 0x00, 0xa0, 0xa0, 0xa0, 0x55,
+  0x50, 0x30, 0x20, 0x3a, 0x00, 0xb9, 0x88, 0x21, 0x00, 0x00, 0x1a, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x2f, 0x70, 0x12, 0x79, 0x03, 0x00, 0x03, 0x00, 0x14,
+  0x3d, 0x11, 0x01, 0x84, 0xff, 0x09, 0x9f, 0x00, 0x2f, 0x80, 0x1f, 0x00,
+  0x9f, 0x05, 0x76, 0x00, 0x02, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf3, 0x90
+};
+unsigned int edid_blob_len = 384;
+
+
+int
+main (int    argc,
+      char **argv)
+{
+  MetaEdidInfo *edid;
+
+  edid = meta_edid_info_new_parse (edid_blob);
+  g_assert (edid != NULL);
+  g_assert (strcmp (edid->manufacturer_code, "GSM") == 0);
+  g_assert (edid->product_code == 23507);
+  g_assert (edid->hdr_static_metadata.max_luminance == 97);
+  g_assert (edid->hdr_static_metadata.tf ==
+            (META_EDID_TF_TRADITIONAL_GAMMA_SDR | META_EDID_TF_PQ));
+  g_assert (edid->colorimetry ==
+            (META_EDID_COLORIMETRY_BT2020YCC | META_EDID_COLORIMETRY_BT2020RGB));
+}

src/tests/meson.build

@@ -201,6 +201,11 @@ test_cases += [
     'suite': 'unit',
     'sources': [ 'anonymous-file.c', ],
   },
+  {
+    'name': 'edid',
+    'suite': 'unit',
+    'sources': [ 'edid-tests.c', ],
+  },
 ]
 
 if have_native_tests