1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "ui/display/util/edid_parser.h"
6
7 #include "base/memory/scoped_ptr.h"
8 #include "testing/gtest/include/gtest/gtest.h"
9
10 namespace ui {
11
12 namespace {
13
14 // Returns the number of characters in the string literal but doesn't count its
15 // terminator NULL byte.
16 #define charsize(str) (arraysize(str) - 1)
17
18 // Sample EDID data extracted from real devices.
19 const unsigned char kNormalDisplay[] =
20 "\x00\xff\xff\xff\xff\xff\xff\x00\x22\xf0\x6c\x28\x01\x01\x01\x01"
21 "\x02\x16\x01\x04\xb5\x40\x28\x78\xe2\x8d\x85\xad\x4f\x35\xb1\x25"
22 "\x0e\x50\x54\x00\x00\x00\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01"
23 "\x01\x01\x01\x01\x01\x01\xe2\x68\x00\xa0\xa0\x40\x2e\x60\x30\x20"
24 "\x36\x00\x81\x90\x21\x00\x00\x1a\xbc\x1b\x00\xa0\x50\x20\x17\x30"
25 "\x30\x20\x36\x00\x81\x90\x21\x00\x00\x1a\x00\x00\x00\xfc\x00\x48"
26 "\x50\x20\x5a\x52\x33\x30\x77\x0a\x20\x20\x20\x20\x00\x00\x00\xff"
27 "\x00\x43\x4e\x34\x32\x30\x32\x31\x33\x37\x51\x0a\x20\x20\x00\x71";
28
29 const unsigned char kInternalDisplay[] =
30 "\x00\xff\xff\xff\xff\xff\xff\x00\x4c\xa3\x42\x31\x00\x00\x00\x00"
31 "\x00\x15\x01\x03\x80\x1a\x10\x78\x0a\xd3\xe5\x95\x5c\x60\x90\x27"
32 "\x19\x50\x54\x00\x00\x00\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01"
33 "\x01\x01\x01\x01\x01\x01\x9e\x1b\x00\xa0\x50\x20\x12\x30\x10\x30"
34 "\x13\x00\x05\xa3\x10\x00\x00\x19\x00\x00\x00\x0f\x00\x00\x00\x00"
35 "\x00\x00\x00\x00\x00\x23\x87\x02\x64\x00\x00\x00\x00\xfe\x00\x53"
36 "\x41\x4d\x53\x55\x4e\x47\x0a\x20\x20\x20\x20\x20\x00\x00\x00\xfe"
37 "\x00\x31\x32\x31\x41\x54\x31\x31\x2d\x38\x30\x31\x0a\x20\x00\x45";
38
39 const unsigned char kOverscanDisplay[] =
40 "\x00\xff\xff\xff\xff\xff\xff\x00\x4c\x2d\xfe\x08\x00\x00\x00\x00"
41 "\x29\x15\x01\x03\x80\x10\x09\x78\x0a\xee\x91\xa3\x54\x4c\x99\x26"
42 "\x0f\x50\x54\xbd\xef\x80\x71\x4f\x81\xc0\x81\x00\x81\x80\x95\x00"
43 "\xa9\xc0\xb3\x00\x01\x01\x02\x3a\x80\x18\x71\x38\x2d\x40\x58\x2c"
44 "\x45\x00\xa0\x5a\x00\x00\x00\x1e\x66\x21\x56\xaa\x51\x00\x1e\x30"
45 "\x46\x8f\x33\x00\xa0\x5a\x00\x00\x00\x1e\x00\x00\x00\xfd\x00\x18"
46 "\x4b\x0f\x51\x17\x00\x0a\x20\x20\x20\x20\x20\x20\x00\x00\x00\xfc"
47 "\x00\x53\x41\x4d\x53\x55\x4e\x47\x0a\x20\x20\x20\x20\x20\x01\x1d"
48 "\x02\x03\x1f\xf1\x47\x90\x04\x05\x03\x20\x22\x07\x23\x09\x07\x07"
49 "\x83\x01\x00\x00\xe2\x00\x0f\x67\x03\x0c\x00\x20\x00\xb8\x2d\x01"
50 "\x1d\x80\x18\x71\x1c\x16\x20\x58\x2c\x25\x00\xa0\x5a\x00\x00\x00"
51 "\x9e\x01\x1d\x00\x72\x51\xd0\x1e\x20\x6e\x28\x55\x00\xa0\x5a\x00"
52 "\x00\x00\x1e\x8c\x0a\xd0\x8a\x20\xe0\x2d\x10\x10\x3e\x96\x00\xa0"
53 "\x5a\x00\x00\x00\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
54 "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
55 "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xc6";
56
57 // The EDID info misdetecting overscan once. see crbug.com/226318
58 const unsigned char kMisdetectedDisplay[] =
59 "\x00\xff\xff\xff\xff\xff\xff\x00\x10\xac\x64\x40\x4c\x30\x30\x32"
60 "\x0c\x15\x01\x03\x80\x40\x28\x78\xea\x8d\x85\xad\x4f\x35\xb1\x25"
61 "\x0e\x50\x54\xa5\x4b\x00\x71\x4f\x81\x00\x81\x80\xd1\x00\xa9\x40"
62 "\x01\x01\x01\x01\x01\x01\x28\x3c\x80\xa0\x70\xb0\x23\x40\x30\x20"
63 "\x36\x00\x81\x91\x21\x00\x00\x1a\x00\x00\x00\xff\x00\x50\x48\x35"
64 "\x4e\x59\x31\x33\x4e\x32\x30\x30\x4c\x0a\x00\x00\x00\xfc\x00\x44"
65 "\x45\x4c\x4c\x20\x55\x33\x30\x31\x31\x0a\x20\x20\x00\x00\x00\xfd"
66 "\x00\x31\x56\x1d\x5e\x12\x00\x0a\x20\x20\x20\x20\x20\x20\x01\x38"
67 "\x02\x03\x29\xf1\x50\x90\x05\x04\x03\x02\x07\x16\x01\x06\x11\x12"
68 "\x15\x13\x14\x1f\x20\x23\x0d\x7f\x07\x83\x0f\x00\x00\x67\x03\x0c"
69 "\x00\x10\x00\x38\x2d\xe3\x05\x03\x01\x02\x3a\x80\x18\x71\x38\x2d"
70 "\x40\x58\x2c\x45\x00\x81\x91\x21\x00\x00\x1e\x01\x1d\x80\x18\x71"
71 "\x1c\x16\x20\x58\x2c\x25\x00\x81\x91\x21\x00\x00\x9e\x01\x1d\x00"
72 "\x72\x51\xd0\x1e\x20\x6e\x28\x55\x00\x81\x91\x21\x00\x00\x1e\x8c"
73 "\x0a\xd0\x8a\x20\xe0\x2d\x10\x10\x3e\x96\x00\x81\x91\x21\x00\x00"
74 "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x94";
75
76 const unsigned char kLP2565A[] =
77 "\x00\xFF\xFF\xFF\xFF\xFF\xFF\x00\x22\xF0\x76\x26\x01\x01\x01\x01"
78 "\x02\x12\x01\x03\x80\x34\x21\x78\xEE\xEF\x95\xA3\x54\x4C\x9B\x26"
79 "\x0F\x50\x54\xA5\x6B\x80\x81\x40\x81\x80\x81\x99\x71\x00\xA9\x00"
80 "\xA9\x40\xB3\x00\xD1\x00\x28\x3C\x80\xA0\x70\xB0\x23\x40\x30\x20"
81 "\x36\x00\x07\x44\x21\x00\x00\x1A\x00\x00\x00\xFD\x00\x30\x55\x1E"
82 "\x5E\x11\x00\x0A\x20\x20\x20\x20\x20\x20\x00\x00\x00\xFC\x00\x48"
83 "\x50\x20\x4C\x50\x32\x34\x36\x35\x0A\x20\x20\x20\x00\x00\x00\xFF"
84 "\x00\x43\x4E\x4B\x38\x30\x32\x30\x34\x48\x4D\x0A\x20\x20\x00\xA4";
85
86 const unsigned char kLP2565B[] =
87 "\x00\xFF\xFF\xFF\xFF\xFF\xFF\x00\x22\xF0\x75\x26\x01\x01\x01\x01"
88 "\x02\x12\x01\x03\x6E\x34\x21\x78\xEE\xEF\x95\xA3\x54\x4C\x9B\x26"
89 "\x0F\x50\x54\xA5\x6B\x80\x81\x40\x71\x00\xA9\x00\xA9\x40\xA9\x4F"
90 "\xB3\x00\xD1\xC0\xD1\x00\x28\x3C\x80\xA0\x70\xB0\x23\x40\x30\x20"
91 "\x36\x00\x07\x44\x21\x00\x00\x1A\x00\x00\x00\xFD\x00\x30\x55\x1E"
92 "\x5E\x15\x00\x0A\x20\x20\x20\x20\x20\x20\x00\x00\x00\xFC\x00\x48"
93 "\x50\x20\x4C\x50\x32\x34\x36\x35\x0A\x20\x20\x20\x00\x00\x00\xFF"
94 "\x00\x43\x4E\x4B\x38\x30\x32\x30\x34\x48\x4D\x0A\x20\x20\x00\x45";
95
96 } // namespace
97
TEST(EDIDParserTest,ParseOverscanFlag)98 TEST(EDIDParserTest, ParseOverscanFlag) {
99 bool flag = false;
100 std::vector<uint8_t> edid(
101 kNormalDisplay, kNormalDisplay + charsize(kNormalDisplay));
102 EXPECT_FALSE(ParseOutputOverscanFlag(edid, &flag));
103
104 flag = false;
105 edid.assign(kInternalDisplay, kInternalDisplay + charsize(kInternalDisplay));
106 EXPECT_FALSE(ParseOutputOverscanFlag(edid, &flag));
107
108 flag = false;
109 edid.assign(kOverscanDisplay, kOverscanDisplay + charsize(kOverscanDisplay));
110 EXPECT_TRUE(ParseOutputOverscanFlag(edid, &flag));
111 EXPECT_TRUE(flag);
112
113 flag = false;
114 edid.assign(
115 kMisdetectedDisplay, kMisdetectedDisplay + charsize(kMisdetectedDisplay));
116 EXPECT_FALSE(ParseOutputOverscanFlag(edid, &flag));
117
118 flag = false;
119 // Copy |kOverscanDisplay| and set flags to false in it. The overscan flags
120 // are embedded at byte 150 in this specific example. Fix here too when the
121 // contents of kOverscanDisplay is altered.
122 edid.assign(kOverscanDisplay, kOverscanDisplay + charsize(kOverscanDisplay));
123 edid[150] = '\0';
124 EXPECT_TRUE(ParseOutputOverscanFlag(edid, &flag));
125 EXPECT_FALSE(flag);
126 }
127
TEST(EDIDParserTest,ParseBrokenOverscanData)128 TEST(EDIDParserTest, ParseBrokenOverscanData) {
129 // Do not fill valid data here because it anyway fails to parse the data.
130 std::vector<uint8_t> data;
131 bool flag = false;
132 EXPECT_FALSE(ParseOutputOverscanFlag(data, &flag));
133 data.assign(126, '\0');
134 EXPECT_FALSE(ParseOutputOverscanFlag(data, &flag));
135
136 // extending data because ParseOutputOverscanFlag() will access the data.
137 data.assign(128, '\0');
138 // The number of CEA extensions is stored at byte 126.
139 data[126] = '\x01';
140 EXPECT_FALSE(ParseOutputOverscanFlag(data, &flag));
141
142 data.assign(150, '\0');
143 data[126] = '\x01';
144 EXPECT_FALSE(ParseOutputOverscanFlag(data, &flag));
145 }
146
TEST(EDIDParserTest,ParseEDID)147 TEST(EDIDParserTest, ParseEDID) {
148 uint16_t manufacturer_id = 0;
149 std::string human_readable_name;
150 std::vector<uint8_t> edid(
151 kNormalDisplay, kNormalDisplay + charsize(kNormalDisplay));
152 EXPECT_TRUE(ParseOutputDeviceData(
153 edid, &manufacturer_id, &human_readable_name));
154 EXPECT_EQ(0x22f0u, manufacturer_id);
155 EXPECT_EQ("HP ZR30w", human_readable_name);
156
157 manufacturer_id = 0;
158 human_readable_name.clear();
159 edid.assign(kInternalDisplay, kInternalDisplay + charsize(kInternalDisplay));
160 EXPECT_TRUE(ParseOutputDeviceData(edid, &manufacturer_id, NULL));
161 EXPECT_EQ(0x4ca3u, manufacturer_id);
162 EXPECT_EQ("", human_readable_name);
163
164 // Internal display doesn't have name.
165 EXPECT_TRUE(ParseOutputDeviceData(edid, NULL, &human_readable_name));
166 EXPECT_TRUE(human_readable_name.empty());
167
168 manufacturer_id = 0;
169 human_readable_name.clear();
170 edid.assign(kOverscanDisplay, kOverscanDisplay + charsize(kOverscanDisplay));
171 EXPECT_TRUE(ParseOutputDeviceData(
172 edid, &manufacturer_id, &human_readable_name));
173 EXPECT_EQ(0x4c2du, manufacturer_id);
174 EXPECT_EQ("SAMSUNG", human_readable_name);
175 }
176
TEST(EDIDParserTest,ParseBrokenEDID)177 TEST(EDIDParserTest, ParseBrokenEDID) {
178 uint16_t manufacturer_id = 0;
179 std::string human_readable_name;
180 std::vector<uint8_t> edid;
181
182 // length == 0
183 EXPECT_FALSE(ParseOutputDeviceData(
184 edid, &manufacturer_id, &human_readable_name));
185
186 // name is broken. Copying kNormalDisplay and substitute its name data by
187 // some control code.
188 edid.assign(kNormalDisplay, kNormalDisplay + charsize(kNormalDisplay));
189
190 // display's name data is embedded in byte 95-107 in this specific example.
191 // Fix here too when the contents of kNormalDisplay is altered.
192 edid[97] = '\x1b';
193 EXPECT_FALSE(ParseOutputDeviceData(
194 edid, &manufacturer_id, &human_readable_name));
195
196 // If |human_readable_name| isn't specified, it skips parsing the name.
197 manufacturer_id = 0;
198 EXPECT_TRUE(ParseOutputDeviceData(edid, &manufacturer_id, NULL));
199 EXPECT_EQ(0x22f0u, manufacturer_id);
200 }
201
TEST(EDIDParserTest,GetDisplayId)202 TEST(EDIDParserTest, GetDisplayId) {
203 // EDID of kLP2565A and B are slightly different but actually the same device.
204 int64_t id1 = -1;
205 int64_t id2 = -1;
206 std::vector<uint8_t> edid(kLP2565A, kLP2565A + charsize(kLP2565A));
207 EXPECT_TRUE(GetDisplayIdFromEDID(edid, 0, &id1));
208 edid.assign(kLP2565B, kLP2565B + charsize(kLP2565B));
209 EXPECT_TRUE(GetDisplayIdFromEDID(edid, 0, &id2));
210 EXPECT_EQ(id1, id2);
211 EXPECT_NE(-1, id1);
212 }
213
TEST(EDIDParserTest,GetDisplayIdFromInternal)214 TEST(EDIDParserTest, GetDisplayIdFromInternal) {
215 int64_t id = -1;
216 std::vector<uint8_t> edid(
217 kInternalDisplay, kInternalDisplay + charsize(kInternalDisplay));
218 EXPECT_TRUE(GetDisplayIdFromEDID(edid, 0, &id));
219 EXPECT_NE(-1, id);
220 }
221
TEST(EDIDParserTest,GetDisplayIdFailure)222 TEST(EDIDParserTest, GetDisplayIdFailure) {
223 int64_t id = -1;
224 std::vector<uint8_t> edid;
225 EXPECT_FALSE(GetDisplayIdFromEDID(edid, 0, &id));
226 EXPECT_EQ(-1, id);
227 }
228
229 } // namespace ui
230