1
2
3
4
5
6
7
8
9
10
11
12
13#include <common.h>
14#include <edid.h>
15#include <linux/ctype.h>
16#include <linux/string.h>
17
18int edid_check_info(struct edid1_info *edid_info)
19{
20 if ((edid_info == NULL) || (edid_info->version == 0))
21 return -1;
22
23 if (memcmp(edid_info->header, "\x0\xff\xff\xff\xff\xff\xff\x0", 8))
24 return -1;
25
26 if (edid_info->version == 0xff && edid_info->revision == 0xff)
27 return -1;
28
29 return 0;
30}
31
32int edid_get_ranges(struct edid1_info *edid, unsigned int *hmin,
33 unsigned int *hmax, unsigned int *vmin,
34 unsigned int *vmax)
35{
36 int i;
37 struct edid_monitor_descriptor *monitor;
38
39 *hmin = *hmax = *vmin = *vmax = 0;
40 if (edid_check_info(edid))
41 return -1;
42
43 for (i = 0; i < ARRAY_SIZE(edid->monitor_details.descriptor); i++) {
44 monitor = &edid->monitor_details.descriptor[i];
45 if (monitor->type == EDID_MONITOR_DESCRIPTOR_RANGE) {
46 *hmin = monitor->data.range_data.horizontal_min;
47 *hmax = monitor->data.range_data.horizontal_max;
48 *vmin = monitor->data.range_data.vertical_min;
49 *vmax = monitor->data.range_data.vertical_max;
50 return 0;
51 }
52 }
53 return -1;
54}
55
56
57
58
59
60
61
62static char *snip(char *string)
63{
64 char *s;
65
66
67
68
69
70 string[12] = '\0';
71 s = &string[strlen(string) - 1];
72
73 while (s >= string && (isspace(*s) || *s == '\n' || *s == '\r' ||
74 *s == '\0'))
75 *(s--) = '\0';
76
77 return string;
78}
79
80
81
82
83
84
85
86static void edid_print_dtd(struct edid_monitor_descriptor *monitor,
87 unsigned int *have_timing)
88{
89 unsigned char *bytes = (unsigned char *)monitor;
90 struct edid_detailed_timing *timing =
91 (struct edid_detailed_timing *)monitor;
92
93 if (bytes[0] == 0 && bytes[1] == 0) {
94 if (monitor->type == EDID_MONITOR_DESCRIPTOR_SERIAL)
95 printf("Monitor serial number: %s\n",
96 snip(monitor->data.string));
97 else if (monitor->type == EDID_MONITOR_DESCRIPTOR_ASCII)
98 printf("Monitor ID: %s\n",
99 snip(monitor->data.string));
100 else if (monitor->type == EDID_MONITOR_DESCRIPTOR_NAME)
101 printf("Monitor name: %s\n",
102 snip(monitor->data.string));
103 else if (monitor->type == EDID_MONITOR_DESCRIPTOR_RANGE)
104 printf("Monitor range limits, horizontal sync: "
105 "%d-%d kHz, vertical refresh: "
106 "%d-%d Hz, max pixel clock: "
107 "%d MHz\n",
108 monitor->data.range_data.horizontal_min,
109 monitor->data.range_data.horizontal_max,
110 monitor->data.range_data.vertical_min,
111 monitor->data.range_data.vertical_max,
112 monitor->data.range_data.pixel_clock_max * 10);
113 } else {
114 uint32_t pixclock, h_active, h_blanking, v_active, v_blanking;
115 uint32_t h_total, v_total, vfreq;
116
117 pixclock = EDID_DETAILED_TIMING_PIXEL_CLOCK(*timing);
118 h_active = EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(*timing);
119 h_blanking = EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(*timing);
120 v_active = EDID_DETAILED_TIMING_VERTICAL_ACTIVE(*timing);
121 v_blanking = EDID_DETAILED_TIMING_VERTICAL_BLANKING(*timing);
122
123 h_total = h_active + h_blanking;
124 v_total = v_active + v_blanking;
125 if (v_total * h_total)
126 vfreq = pixclock / (v_total * h_total);
127 else
128 vfreq = 1;
129 printf("\t%dx%d\%c\t%d Hz (detailed)\n", h_active,
130 v_active, h_active > 1000 ? ' ' : '\t', vfreq);
131 *have_timing = 1;
132 }
133}
134
135
136
137
138
139
140
141static void edid_get_manufacturer_name(struct edid1_info *edid, char *name)
142{
143 name[0] = EDID1_INFO_MANUFACTURER_NAME_CHAR1(*edid) + 'A' - 1;
144 name[1] = EDID1_INFO_MANUFACTURER_NAME_CHAR2(*edid) + 'A' - 1;
145 name[2] = EDID1_INFO_MANUFACTURER_NAME_CHAR3(*edid) + 'A' - 1;
146 name[3] = '\0';
147}
148
149void edid_print_info(struct edid1_info *edid_info)
150{
151 int i;
152 char manufacturer[4];
153 unsigned int have_timing = 0;
154 uint32_t serial_number;
155
156 if (edid_check_info(edid_info)) {
157 printf("Not a valid EDID\n");
158 return;
159 }
160
161 printf("EDID version: %d.%d\n",
162 edid_info->version, edid_info->revision);
163
164 printf("Product ID code: %04x\n", EDID1_INFO_PRODUCT_CODE(*edid_info));
165
166 edid_get_manufacturer_name(edid_info, manufacturer);
167 printf("Manufacturer: %s\n", manufacturer);
168
169 serial_number = EDID1_INFO_SERIAL_NUMBER(*edid_info);
170 if (serial_number != 0xffffffff) {
171 if (strcmp(manufacturer, "MAG") == 0)
172 serial_number -= 0x7000000;
173 if (strcmp(manufacturer, "OQI") == 0)
174 serial_number -= 456150000;
175 if (strcmp(manufacturer, "VSC") == 0)
176 serial_number -= 640000000;
177 }
178 printf("Serial number: %08x\n", serial_number);
179 printf("Manufactured in week: %d year: %d\n",
180 edid_info->week, edid_info->year + 1990);
181
182 printf("Video input definition: %svoltage level %d%s%s%s%s%s\n",
183 EDID1_INFO_VIDEO_INPUT_DIGITAL(*edid_info) ?
184 "digital signal, " : "analog signal, ",
185 EDID1_INFO_VIDEO_INPUT_VOLTAGE_LEVEL(*edid_info),
186 EDID1_INFO_VIDEO_INPUT_BLANK_TO_BLACK(*edid_info) ?
187 ", blank to black" : "",
188 EDID1_INFO_VIDEO_INPUT_SEPARATE_SYNC(*edid_info) ?
189 ", separate sync" : "",
190 EDID1_INFO_VIDEO_INPUT_COMPOSITE_SYNC(*edid_info) ?
191 ", composite sync" : "",
192 EDID1_INFO_VIDEO_INPUT_SYNC_ON_GREEN(*edid_info) ?
193 ", sync on green" : "",
194 EDID1_INFO_VIDEO_INPUT_SERRATION_V(*edid_info) ?
195 ", serration v" : "");
196
197 printf("Monitor is %s\n",
198 EDID1_INFO_FEATURE_RGB(*edid_info) ? "RGB" : "non-RGB");
199
200 printf("Maximum visible display size: %d cm x %d cm\n",
201 edid_info->max_size_horizontal,
202 edid_info->max_size_vertical);
203
204 printf("Power management features: %s%s, %s%s, %s%s\n",
205 EDID1_INFO_FEATURE_ACTIVE_OFF(*edid_info) ?
206 "" : "no ", "active off",
207 EDID1_INFO_FEATURE_SUSPEND(*edid_info) ? "" : "no ", "suspend",
208 EDID1_INFO_FEATURE_STANDBY(*edid_info) ? "" : "no ", "standby");
209
210 printf("Estabilished timings:\n");
211 if (EDID1_INFO_ESTABLISHED_TIMING_720X400_70(*edid_info))
212 printf("\t720x400\t\t70 Hz (VGA 640x400, IBM)\n");
213 if (EDID1_INFO_ESTABLISHED_TIMING_720X400_88(*edid_info))
214 printf("\t720x400\t\t88 Hz (XGA2)\n");
215 if (EDID1_INFO_ESTABLISHED_TIMING_640X480_60(*edid_info))
216 printf("\t640x480\t\t60 Hz (VGA)\n");
217 if (EDID1_INFO_ESTABLISHED_TIMING_640X480_67(*edid_info))
218 printf("\t640x480\t\t67 Hz (Mac II, Apple)\n");
219 if (EDID1_INFO_ESTABLISHED_TIMING_640X480_72(*edid_info))
220 printf("\t640x480\t\t72 Hz (VESA)\n");
221 if (EDID1_INFO_ESTABLISHED_TIMING_640X480_75(*edid_info))
222 printf("\t640x480\t\t75 Hz (VESA)\n");
223 if (EDID1_INFO_ESTABLISHED_TIMING_800X600_56(*edid_info))
224 printf("\t800x600\t\t56 Hz (VESA)\n");
225 if (EDID1_INFO_ESTABLISHED_TIMING_800X600_60(*edid_info))
226 printf("\t800x600\t\t60 Hz (VESA)\n");
227 if (EDID1_INFO_ESTABLISHED_TIMING_800X600_72(*edid_info))
228 printf("\t800x600\t\t72 Hz (VESA)\n");
229 if (EDID1_INFO_ESTABLISHED_TIMING_800X600_75(*edid_info))
230 printf("\t800x600\t\t75 Hz (VESA)\n");
231 if (EDID1_INFO_ESTABLISHED_TIMING_832X624_75(*edid_info))
232 printf("\t832x624\t\t75 Hz (Mac II)\n");
233 if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_87I(*edid_info))
234 printf("\t1024x768\t87 Hz Interlaced (8514A)\n");
235 if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_60(*edid_info))
236 printf("\t1024x768\t60 Hz (VESA)\n");
237 if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_70(*edid_info))
238 printf("\t1024x768\t70 Hz (VESA)\n");
239 if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_75(*edid_info))
240 printf("\t1024x768\t75 Hz (VESA)\n");
241 if (EDID1_INFO_ESTABLISHED_TIMING_1280X1024_75(*edid_info))
242 printf("\t1280x1024\t75 (VESA)\n");
243 if (EDID1_INFO_ESTABLISHED_TIMING_1152X870_75(*edid_info))
244 printf("\t1152x870\t75 (Mac II)\n");
245
246
247 printf("Standard timings:\n");
248 for (i = 0; i < ARRAY_SIZE(edid_info->standard_timings); i++) {
249 unsigned int aspect = 10000;
250 unsigned int x, y;
251 unsigned char xres, vfreq;
252
253 xres = EDID1_INFO_STANDARD_TIMING_XRESOLUTION(*edid_info, i);
254 vfreq = EDID1_INFO_STANDARD_TIMING_VFREQ(*edid_info, i);
255 if ((xres != vfreq) ||
256 ((xres != 0) && (xres != 1)) ||
257 ((vfreq != 0) && (vfreq != 1))) {
258 switch (EDID1_INFO_STANDARD_TIMING_ASPECT(*edid_info,
259 i)) {
260 case ASPECT_625:
261 aspect = 6250;
262 break;
263 case ASPECT_75:
264 aspect = 7500;
265 break;
266 case ASPECT_8:
267 aspect = 8000;
268 break;
269 case ASPECT_5625:
270 aspect = 5625;
271 break;
272 }
273 x = (xres + 31) * 8;
274 y = x * aspect / 10000;
275 printf("\t%dx%d%c\t%d Hz\n", x, y,
276 x > 1000 ? ' ' : '\t', (vfreq & 0x3f) + 60);
277 have_timing = 1;
278 }
279 }
280
281
282 for (i = 0; i < ARRAY_SIZE(edid_info->monitor_details.descriptor);
283 i++) {
284 edid_print_dtd(&edid_info->monitor_details.descriptor[i],
285 &have_timing);
286 }
287
288 if (!have_timing)
289 printf("\tNone\n");
290}
291
