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13#include <common.h>
14#include <edid.h>
15#include <errno.h>
16#include <fdtdec.h>
17#include <linux/ctype.h>
18#include <linux/string.h>
19
20int edid_check_info(struct edid1_info *edid_info)
21{
22 if ((edid_info == NULL) || (edid_info->version == 0))
23 return -1;
24
25 if (memcmp(edid_info->header, "\x0\xff\xff\xff\xff\xff\xff\x0", 8))
26 return -1;
27
28 if (edid_info->version == 0xff && edid_info->revision == 0xff)
29 return -1;
30
31 return 0;
32}
33
34int edid_check_checksum(u8 *edid_block)
35{
36 u8 checksum = 0;
37 int i;
38
39 for (i = 0; i < 128; i++)
40 checksum += edid_block[i];
41
42 return (checksum == 0) ? 0 : -EINVAL;
43}
44
45int edid_get_ranges(struct edid1_info *edid, unsigned int *hmin,
46 unsigned int *hmax, unsigned int *vmin,
47 unsigned int *vmax)
48{
49 int i;
50 struct edid_monitor_descriptor *monitor;
51
52 *hmin = *hmax = *vmin = *vmax = 0;
53 if (edid_check_info(edid))
54 return -1;
55
56 for (i = 0; i < ARRAY_SIZE(edid->monitor_details.descriptor); i++) {
57 monitor = &edid->monitor_details.descriptor[i];
58 if (monitor->type == EDID_MONITOR_DESCRIPTOR_RANGE) {
59 *hmin = monitor->data.range_data.horizontal_min;
60 *hmax = monitor->data.range_data.horizontal_max;
61 *vmin = monitor->data.range_data.vertical_min;
62 *vmax = monitor->data.range_data.vertical_max;
63 return 0;
64 }
65 }
66 return -1;
67}
68
69
70static void set_entry(struct timing_entry *entry, u32 value)
71{
72 entry->min = value;
73 entry->typ = value;
74 entry->max = value;
75}
76
77
78
79
80
81
82
83static void decode_timing(u8 *buf, struct display_timing *timing)
84{
85 uint x_mm, y_mm;
86 unsigned int ha, hbl, hso, hspw, hborder;
87 unsigned int va, vbl, vso, vspw, vborder;
88
89
90 set_entry(&timing->pixelclock, (buf[0] + (buf[1] << 8)) * 10000);
91 x_mm = (buf[12] + ((buf[14] & 0xf0) << 4));
92 y_mm = (buf[13] + ((buf[14] & 0x0f) << 8));
93 ha = (buf[2] + ((buf[4] & 0xf0) << 4));
94 hbl = (buf[3] + ((buf[4] & 0x0f) << 8));
95 hso = (buf[8] + ((buf[11] & 0xc0) << 2));
96 hspw = (buf[9] + ((buf[11] & 0x30) << 4));
97 hborder = buf[15];
98 va = (buf[5] + ((buf[7] & 0xf0) << 4));
99 vbl = (buf[6] + ((buf[7] & 0x0f) << 8));
100 vso = ((buf[10] >> 4) + ((buf[11] & 0x0c) << 2));
101 vspw = ((buf[10] & 0x0f) + ((buf[11] & 0x03) << 4));
102 vborder = buf[16];
103
104 set_entry(&timing->hactive, ha);
105 set_entry(&timing->hfront_porch, hso);
106 set_entry(&timing->hback_porch, hbl - hso - hspw);
107 set_entry(&timing->hsync_len, hspw);
108
109 set_entry(&timing->vactive, va);
110 set_entry(&timing->vfront_porch, vso);
111 set_entry(&timing->vback_porch, vbl - vso - vspw);
112 set_entry(&timing->vsync_len, vspw);
113
114 debug("Detailed mode clock %u Hz, %d mm x %d mm\n"
115 " %04x %04x %04x %04x hborder %x\n"
116 " %04x %04x %04x %04x vborder %x\n",
117 timing->pixelclock.typ,
118 x_mm, y_mm,
119 ha, ha + hso, ha + hso + hspw,
120 ha + hbl, hborder,
121 va, va + vso, va + vso + vspw,
122 va + vbl, vborder);
123}
124
125int edid_get_timing(u8 *buf, int buf_size, struct display_timing *timing,
126 int *panel_bits_per_colourp)
127{
128 struct edid1_info *edid = (struct edid1_info *)buf;
129 bool timing_done;
130 int i;
131
132 if (buf_size < sizeof(*edid) || edid_check_info(edid)) {
133 debug("%s: Invalid buffer\n", __func__);
134 return -EINVAL;
135 }
136
137 if (!EDID1_INFO_FEATURE_PREFERRED_TIMING_MODE(*edid)) {
138 debug("%s: No preferred timing\n", __func__);
139 return -ENOENT;
140 }
141
142
143 timing_done = false;
144 for (i = 0; i < 4; i++) {
145 struct edid_monitor_descriptor *desc;
146
147 desc = &edid->monitor_details.descriptor[i];
148 if (desc->zero_flag_1 != 0) {
149 decode_timing((u8 *)desc, timing);
150 timing_done = true;
151 break;
152 }
153 }
154 if (!timing_done)
155 return -EINVAL;
156
157 if (!EDID1_INFO_VIDEO_INPUT_DIGITAL(*edid)) {
158 debug("%s: Not a digital display\n", __func__);
159 return -ENOSYS;
160 }
161 if (edid->version != 1 || edid->revision < 4) {
162 debug("%s: EDID version %d.%d does not have required info\n",
163 __func__, edid->version, edid->revision);
164 *panel_bits_per_colourp = -1;
165 } else {
166 *panel_bits_per_colourp =
167 ((edid->video_input_definition & 0x70) >> 3) + 4;
168 }
169
170 return 0;
171}
172
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176
177
178
179static char *snip(char *string)
180{
181 char *s;
182
183
184
185
186
187 string[12] = '\0';
188 s = &string[strlen(string) - 1];
189
190 while (s >= string && (isspace(*s) || *s == '\n' || *s == '\r' ||
191 *s == '\0'))
192 *(s--) = '\0';
193
194 return string;
195}
196
197
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200
201
202
203static void edid_print_dtd(struct edid_monitor_descriptor *monitor,
204 unsigned int *have_timing)
205{
206 unsigned char *bytes = (unsigned char *)monitor;
207 struct edid_detailed_timing *timing =
208 (struct edid_detailed_timing *)monitor;
209
210 if (bytes[0] == 0 && bytes[1] == 0) {
211 if (monitor->type == EDID_MONITOR_DESCRIPTOR_SERIAL)
212 printf("Monitor serial number: %s\n",
213 snip(monitor->data.string));
214 else if (monitor->type == EDID_MONITOR_DESCRIPTOR_ASCII)
215 printf("Monitor ID: %s\n",
216 snip(monitor->data.string));
217 else if (monitor->type == EDID_MONITOR_DESCRIPTOR_NAME)
218 printf("Monitor name: %s\n",
219 snip(monitor->data.string));
220 else if (monitor->type == EDID_MONITOR_DESCRIPTOR_RANGE)
221 printf("Monitor range limits, horizontal sync: "
222 "%d-%d kHz, vertical refresh: "
223 "%d-%d Hz, max pixel clock: "
224 "%d MHz\n",
225 monitor->data.range_data.horizontal_min,
226 monitor->data.range_data.horizontal_max,
227 monitor->data.range_data.vertical_min,
228 monitor->data.range_data.vertical_max,
229 monitor->data.range_data.pixel_clock_max * 10);
230 } else {
231 uint32_t pixclock, h_active, h_blanking, v_active, v_blanking;
232 uint32_t h_total, v_total, vfreq;
233
234 pixclock = EDID_DETAILED_TIMING_PIXEL_CLOCK(*timing);
235 h_active = EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(*timing);
236 h_blanking = EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(*timing);
237 v_active = EDID_DETAILED_TIMING_VERTICAL_ACTIVE(*timing);
238 v_blanking = EDID_DETAILED_TIMING_VERTICAL_BLANKING(*timing);
239
240 h_total = h_active + h_blanking;
241 v_total = v_active + v_blanking;
242 if (v_total * h_total)
243 vfreq = pixclock / (v_total * h_total);
244 else
245 vfreq = 1;
246 printf("\t%dx%d\%c\t%d Hz (detailed)\n", h_active,
247 v_active, h_active > 1000 ? ' ' : '\t', vfreq);
248 *have_timing = 1;
249 }
250}
251
252
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255
256
257
258static void edid_get_manufacturer_name(struct edid1_info *edid, char *name)
259{
260 name[0] = EDID1_INFO_MANUFACTURER_NAME_CHAR1(*edid) + 'A' - 1;
261 name[1] = EDID1_INFO_MANUFACTURER_NAME_CHAR2(*edid) + 'A' - 1;
262 name[2] = EDID1_INFO_MANUFACTURER_NAME_CHAR3(*edid) + 'A' - 1;
263 name[3] = '\0';
264}
265
266void edid_print_info(struct edid1_info *edid_info)
267{
268 int i;
269 char manufacturer[4];
270 unsigned int have_timing = 0;
271 uint32_t serial_number;
272
273 if (edid_check_info(edid_info)) {
274 printf("Not a valid EDID\n");
275 return;
276 }
277
278 printf("EDID version: %d.%d\n",
279 edid_info->version, edid_info->revision);
280
281 printf("Product ID code: %04x\n", EDID1_INFO_PRODUCT_CODE(*edid_info));
282
283 edid_get_manufacturer_name(edid_info, manufacturer);
284 printf("Manufacturer: %s\n", manufacturer);
285
286 serial_number = EDID1_INFO_SERIAL_NUMBER(*edid_info);
287 if (serial_number != 0xffffffff) {
288 if (strcmp(manufacturer, "MAG") == 0)
289 serial_number -= 0x7000000;
290 if (strcmp(manufacturer, "OQI") == 0)
291 serial_number -= 456150000;
292 if (strcmp(manufacturer, "VSC") == 0)
293 serial_number -= 640000000;
294 }
295 printf("Serial number: %08x\n", serial_number);
296 printf("Manufactured in week: %d year: %d\n",
297 edid_info->week, edid_info->year + 1990);
298
299 printf("Video input definition: %svoltage level %d%s%s%s%s%s\n",
300 EDID1_INFO_VIDEO_INPUT_DIGITAL(*edid_info) ?
301 "digital signal, " : "analog signal, ",
302 EDID1_INFO_VIDEO_INPUT_VOLTAGE_LEVEL(*edid_info),
303 EDID1_INFO_VIDEO_INPUT_BLANK_TO_BLACK(*edid_info) ?
304 ", blank to black" : "",
305 EDID1_INFO_VIDEO_INPUT_SEPARATE_SYNC(*edid_info) ?
306 ", separate sync" : "",
307 EDID1_INFO_VIDEO_INPUT_COMPOSITE_SYNC(*edid_info) ?
308 ", composite sync" : "",
309 EDID1_INFO_VIDEO_INPUT_SYNC_ON_GREEN(*edid_info) ?
310 ", sync on green" : "",
311 EDID1_INFO_VIDEO_INPUT_SERRATION_V(*edid_info) ?
312 ", serration v" : "");
313
314 printf("Monitor is %s\n",
315 EDID1_INFO_FEATURE_RGB(*edid_info) ? "RGB" : "non-RGB");
316
317 printf("Maximum visible display size: %d cm x %d cm\n",
318 edid_info->max_size_horizontal,
319 edid_info->max_size_vertical);
320
321 printf("Power management features: %s%s, %s%s, %s%s\n",
322 EDID1_INFO_FEATURE_ACTIVE_OFF(*edid_info) ?
323 "" : "no ", "active off",
324 EDID1_INFO_FEATURE_SUSPEND(*edid_info) ? "" : "no ", "suspend",
325 EDID1_INFO_FEATURE_STANDBY(*edid_info) ? "" : "no ", "standby");
326
327 printf("Estabilished timings:\n");
328 if (EDID1_INFO_ESTABLISHED_TIMING_720X400_70(*edid_info))
329 printf("\t720x400\t\t70 Hz (VGA 640x400, IBM)\n");
330 if (EDID1_INFO_ESTABLISHED_TIMING_720X400_88(*edid_info))
331 printf("\t720x400\t\t88 Hz (XGA2)\n");
332 if (EDID1_INFO_ESTABLISHED_TIMING_640X480_60(*edid_info))
333 printf("\t640x480\t\t60 Hz (VGA)\n");
334 if (EDID1_INFO_ESTABLISHED_TIMING_640X480_67(*edid_info))
335 printf("\t640x480\t\t67 Hz (Mac II, Apple)\n");
336 if (EDID1_INFO_ESTABLISHED_TIMING_640X480_72(*edid_info))
337 printf("\t640x480\t\t72 Hz (VESA)\n");
338 if (EDID1_INFO_ESTABLISHED_TIMING_640X480_75(*edid_info))
339 printf("\t640x480\t\t75 Hz (VESA)\n");
340 if (EDID1_INFO_ESTABLISHED_TIMING_800X600_56(*edid_info))
341 printf("\t800x600\t\t56 Hz (VESA)\n");
342 if (EDID1_INFO_ESTABLISHED_TIMING_800X600_60(*edid_info))
343 printf("\t800x600\t\t60 Hz (VESA)\n");
344 if (EDID1_INFO_ESTABLISHED_TIMING_800X600_72(*edid_info))
345 printf("\t800x600\t\t72 Hz (VESA)\n");
346 if (EDID1_INFO_ESTABLISHED_TIMING_800X600_75(*edid_info))
347 printf("\t800x600\t\t75 Hz (VESA)\n");
348 if (EDID1_INFO_ESTABLISHED_TIMING_832X624_75(*edid_info))
349 printf("\t832x624\t\t75 Hz (Mac II)\n");
350 if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_87I(*edid_info))
351 printf("\t1024x768\t87 Hz Interlaced (8514A)\n");
352 if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_60(*edid_info))
353 printf("\t1024x768\t60 Hz (VESA)\n");
354 if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_70(*edid_info))
355 printf("\t1024x768\t70 Hz (VESA)\n");
356 if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_75(*edid_info))
357 printf("\t1024x768\t75 Hz (VESA)\n");
358 if (EDID1_INFO_ESTABLISHED_TIMING_1280X1024_75(*edid_info))
359 printf("\t1280x1024\t75 (VESA)\n");
360 if (EDID1_INFO_ESTABLISHED_TIMING_1152X870_75(*edid_info))
361 printf("\t1152x870\t75 (Mac II)\n");
362
363
364 printf("Standard timings:\n");
365 for (i = 0; i < ARRAY_SIZE(edid_info->standard_timings); i++) {
366 unsigned int aspect = 10000;
367 unsigned int x, y;
368 unsigned char xres, vfreq;
369
370 xres = EDID1_INFO_STANDARD_TIMING_XRESOLUTION(*edid_info, i);
371 vfreq = EDID1_INFO_STANDARD_TIMING_VFREQ(*edid_info, i);
372 if ((xres != vfreq) ||
373 ((xres != 0) && (xres != 1)) ||
374 ((vfreq != 0) && (vfreq != 1))) {
375 switch (EDID1_INFO_STANDARD_TIMING_ASPECT(*edid_info,
376 i)) {
377 case ASPECT_625:
378 aspect = 6250;
379 break;
380 case ASPECT_75:
381 aspect = 7500;
382 break;
383 case ASPECT_8:
384 aspect = 8000;
385 break;
386 case ASPECT_5625:
387 aspect = 5625;
388 break;
389 }
390 x = (xres + 31) * 8;
391 y = x * aspect / 10000;
392 printf("\t%dx%d%c\t%d Hz\n", x, y,
393 x > 1000 ? ' ' : '\t', (vfreq & 0x3f) + 60);
394 have_timing = 1;
395 }
396 }
397
398
399 for (i = 0; i < ARRAY_SIZE(edid_info->monitor_details.descriptor);
400 i++) {
401 edid_print_dtd(&edid_info->monitor_details.descriptor[i],
402 &have_timing);
403 }
404
405 if (!have_timing)
406 printf("\tNone\n");
407}
408
