blob: c82c298097ba855dc836c1ee20440cd79ab9ed2a [file] [log] [blame]
Tom Wai-Hong Tamd46b5f72012-12-05 14:46:39 +00001/*
2 * Copyright (c) 2012 The Chromium OS Authors.
3 *
4 * (C) Copyright 2010
5 * Petr Stetiar <ynezz@true.cz>
6 *
7 * See file CREDITS for list of people who contributed to this
8 * project.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23 * MA 02111-1307 USA
24 *
25 * Contains stolen code from ddcprobe project which is:
26 * Copyright (C) Nalin Dahyabhai <bigfun@pobox.com>
27 *
28 */
29
30#include <common.h>
31#include <edid.h>
32#include <linux/ctype.h>
33#include <linux/string.h>
34
35int edid_check_info(struct edid1_info *edid_info)
36{
37 if ((edid_info == NULL) || (edid_info->version == 0))
38 return -1;
39
40 if (memcmp(edid_info->header, "\x0\xff\xff\xff\xff\xff\xff\x0", 8))
41 return -1;
42
43 if (edid_info->version == 0xff && edid_info->revision == 0xff)
44 return -1;
45
46 return 0;
47}
48
49int edid_get_ranges(struct edid1_info *edid, unsigned int *hmin,
50 unsigned int *hmax, unsigned int *vmin,
51 unsigned int *vmax)
52{
53 int i;
54 struct edid_monitor_descriptor *monitor;
55
56 *hmin = *hmax = *vmin = *vmax = 0;
57 if (edid_check_info(edid))
58 return -1;
59
60 for (i = 0; i < ARRAY_SIZE(edid->monitor_details.descriptor); i++) {
61 monitor = &edid->monitor_details.descriptor[i];
62 if (monitor->type == EDID_MONITOR_DESCRIPTOR_RANGE) {
63 *hmin = monitor->data.range_data.horizontal_min;
64 *hmax = monitor->data.range_data.horizontal_max;
65 *vmin = monitor->data.range_data.vertical_min;
66 *vmax = monitor->data.range_data.vertical_max;
67 return 0;
68 }
69 }
70 return -1;
71}
72
73/**
74 * Snip the tailing whitespace/return of a string.
75 *
76 * @param string The string to be snipped
77 * @return the snipped string
78 */
79static char *snip(char *string)
80{
81 char *s;
82
83 /*
84 * This is always a 13 character buffer
85 * and it's not always terminated.
86 */
87 string[12] = '\0';
88 s = &string[strlen(string) - 1];
89
90 while (s >= string && (isspace(*s) || *s == '\n' || *s == '\r' ||
91 *s == '\0'))
92 *(s--) = '\0';
93
94 return string;
95}
96
97/**
98 * Print an EDID monitor descriptor block
99 *
100 * @param monitor The EDID monitor descriptor block
101 * @have_timing Modifies to 1 if the desciptor contains timing info
102 */
103static void edid_print_dtd(struct edid_monitor_descriptor *monitor,
104 unsigned int *have_timing)
105{
106 unsigned char *bytes = (unsigned char *)monitor;
107 struct edid_detailed_timing *timing =
108 (struct edid_detailed_timing *)monitor;
109
110 if (bytes[0] == 0 && bytes[1] == 0) {
111 if (monitor->type == EDID_MONITOR_DESCRIPTOR_SERIAL)
112 printf("Monitor serial number: %s\n",
113 snip(monitor->data.string));
114 else if (monitor->type == EDID_MONITOR_DESCRIPTOR_ASCII)
115 printf("Monitor ID: %s\n",
116 snip(monitor->data.string));
117 else if (monitor->type == EDID_MONITOR_DESCRIPTOR_NAME)
118 printf("Monitor name: %s\n",
119 snip(monitor->data.string));
120 else if (monitor->type == EDID_MONITOR_DESCRIPTOR_RANGE)
121 printf("Monitor range limits, horizontal sync: "
122 "%d-%d kHz, vertical refresh: "
123 "%d-%d Hz, max pixel clock: "
124 "%d MHz\n",
125 monitor->data.range_data.horizontal_min,
126 monitor->data.range_data.horizontal_max,
127 monitor->data.range_data.vertical_min,
128 monitor->data.range_data.vertical_max,
129 monitor->data.range_data.pixel_clock_max * 10);
130 } else {
131 uint32_t pixclock, h_active, h_blanking, v_active, v_blanking;
132 uint32_t h_total, v_total, vfreq;
133
134 pixclock = EDID_DETAILED_TIMING_PIXEL_CLOCK(*timing);
135 h_active = EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(*timing);
136 h_blanking = EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(*timing);
137 v_active = EDID_DETAILED_TIMING_VERTICAL_ACTIVE(*timing);
138 v_blanking = EDID_DETAILED_TIMING_VERTICAL_BLANKING(*timing);
139
140 h_total = h_active + h_blanking;
141 v_total = v_active + v_blanking;
142 if (v_total * h_total)
143 vfreq = pixclock / (v_total * h_total);
144 else
145 vfreq = 1; /* Error case */
146 printf("\t%dx%d\%c\t%d Hz (detailed)\n", h_active,
147 v_active, h_active > 1000 ? ' ' : '\t', vfreq);
148 *have_timing = 1;
149 }
150}
151
152/**
153 * Get the manufacturer name from an EDID info.
154 *
155 * @param edid_info The EDID info to be printed
156 * @param name Returns the string of the manufacturer name
157 */
158static void edid_get_manufacturer_name(struct edid1_info *edid, char *name)
159{
160 name[0] = EDID1_INFO_MANUFACTURER_NAME_CHAR1(*edid) + 'A' - 1;
161 name[1] = EDID1_INFO_MANUFACTURER_NAME_CHAR2(*edid) + 'A' - 1;
162 name[2] = EDID1_INFO_MANUFACTURER_NAME_CHAR3(*edid) + 'A' - 1;
163 name[3] = '\0';
164}
165
166void edid_print_info(struct edid1_info *edid_info)
167{
168 int i;
169 char manufacturer[4];
170 unsigned int have_timing = 0;
171 uint32_t serial_number;
172
173 if (edid_check_info(edid_info)) {
174 printf("Not a valid EDID\n");
175 return;
176 }
177
178 printf("EDID version: %d.%d\n",
179 edid_info->version, edid_info->revision);
180
181 printf("Product ID code: %04x\n", EDID1_INFO_PRODUCT_CODE(*edid_info));
182
183 edid_get_manufacturer_name(edid_info, manufacturer);
184 printf("Manufacturer: %s\n", manufacturer);
185
186 serial_number = EDID1_INFO_SERIAL_NUMBER(*edid_info);
187 if (serial_number != 0xffffffff) {
188 if (strcmp(manufacturer, "MAG") == 0)
189 serial_number -= 0x7000000;
190 if (strcmp(manufacturer, "OQI") == 0)
191 serial_number -= 456150000;
192 if (strcmp(manufacturer, "VSC") == 0)
193 serial_number -= 640000000;
194 }
195 printf("Serial number: %08x\n", serial_number);
196 printf("Manufactured in week: %d year: %d\n",
197 edid_info->week, edid_info->year + 1990);
198
199 printf("Video input definition: %svoltage level %d%s%s%s%s%s\n",
200 EDID1_INFO_VIDEO_INPUT_DIGITAL(*edid_info) ?
201 "digital signal, " : "analog signal, ",
202 EDID1_INFO_VIDEO_INPUT_VOLTAGE_LEVEL(*edid_info),
203 EDID1_INFO_VIDEO_INPUT_BLANK_TO_BLACK(*edid_info) ?
204 ", blank to black" : "",
205 EDID1_INFO_VIDEO_INPUT_SEPARATE_SYNC(*edid_info) ?
206 ", separate sync" : "",
207 EDID1_INFO_VIDEO_INPUT_COMPOSITE_SYNC(*edid_info) ?
208 ", composite sync" : "",
209 EDID1_INFO_VIDEO_INPUT_SYNC_ON_GREEN(*edid_info) ?
210 ", sync on green" : "",
211 EDID1_INFO_VIDEO_INPUT_SERRATION_V(*edid_info) ?
212 ", serration v" : "");
213
214 printf("Monitor is %s\n",
215 EDID1_INFO_FEATURE_RGB(*edid_info) ? "RGB" : "non-RGB");
216
217 printf("Maximum visible display size: %d cm x %d cm\n",
218 edid_info->max_size_horizontal,
219 edid_info->max_size_vertical);
220
221 printf("Power management features: %s%s, %s%s, %s%s\n",
222 EDID1_INFO_FEATURE_ACTIVE_OFF(*edid_info) ?
223 "" : "no ", "active off",
224 EDID1_INFO_FEATURE_SUSPEND(*edid_info) ? "" : "no ", "suspend",
225 EDID1_INFO_FEATURE_STANDBY(*edid_info) ? "" : "no ", "standby");
226
227 printf("Estabilished timings:\n");
228 if (EDID1_INFO_ESTABLISHED_TIMING_720X400_70(*edid_info))
229 printf("\t720x400\t\t70 Hz (VGA 640x400, IBM)\n");
230 if (EDID1_INFO_ESTABLISHED_TIMING_720X400_88(*edid_info))
231 printf("\t720x400\t\t88 Hz (XGA2)\n");
232 if (EDID1_INFO_ESTABLISHED_TIMING_640X480_60(*edid_info))
233 printf("\t640x480\t\t60 Hz (VGA)\n");
234 if (EDID1_INFO_ESTABLISHED_TIMING_640X480_67(*edid_info))
235 printf("\t640x480\t\t67 Hz (Mac II, Apple)\n");
236 if (EDID1_INFO_ESTABLISHED_TIMING_640X480_72(*edid_info))
237 printf("\t640x480\t\t72 Hz (VESA)\n");
238 if (EDID1_INFO_ESTABLISHED_TIMING_640X480_75(*edid_info))
239 printf("\t640x480\t\t75 Hz (VESA)\n");
240 if (EDID1_INFO_ESTABLISHED_TIMING_800X600_56(*edid_info))
241 printf("\t800x600\t\t56 Hz (VESA)\n");
242 if (EDID1_INFO_ESTABLISHED_TIMING_800X600_60(*edid_info))
243 printf("\t800x600\t\t60 Hz (VESA)\n");
244 if (EDID1_INFO_ESTABLISHED_TIMING_800X600_72(*edid_info))
245 printf("\t800x600\t\t72 Hz (VESA)\n");
246 if (EDID1_INFO_ESTABLISHED_TIMING_800X600_75(*edid_info))
247 printf("\t800x600\t\t75 Hz (VESA)\n");
248 if (EDID1_INFO_ESTABLISHED_TIMING_832X624_75(*edid_info))
249 printf("\t832x624\t\t75 Hz (Mac II)\n");
250 if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_87I(*edid_info))
251 printf("\t1024x768\t87 Hz Interlaced (8514A)\n");
252 if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_60(*edid_info))
253 printf("\t1024x768\t60 Hz (VESA)\n");
254 if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_70(*edid_info))
255 printf("\t1024x768\t70 Hz (VESA)\n");
256 if (EDID1_INFO_ESTABLISHED_TIMING_1024X768_75(*edid_info))
257 printf("\t1024x768\t75 Hz (VESA)\n");
258 if (EDID1_INFO_ESTABLISHED_TIMING_1280X1024_75(*edid_info))
259 printf("\t1280x1024\t75 (VESA)\n");
260 if (EDID1_INFO_ESTABLISHED_TIMING_1152X870_75(*edid_info))
261 printf("\t1152x870\t75 (Mac II)\n");
262
263 /* Standard timings. */
264 printf("Standard timings:\n");
265 for (i = 0; i < ARRAY_SIZE(edid_info->standard_timings); i++) {
266 unsigned int aspect = 10000;
267 unsigned int x, y;
268 unsigned char xres, vfreq;
269
270 xres = EDID1_INFO_STANDARD_TIMING_XRESOLUTION(*edid_info, i);
271 vfreq = EDID1_INFO_STANDARD_TIMING_VFREQ(*edid_info, i);
272 if ((xres != vfreq) ||
273 ((xres != 0) && (xres != 1)) ||
274 ((vfreq != 0) && (vfreq != 1))) {
275 switch (EDID1_INFO_STANDARD_TIMING_ASPECT(*edid_info,
276 i)) {
277 case ASPECT_625:
278 aspect = 6250;
279 break;
280 case ASPECT_75:
281 aspect = 7500;
282 break;
283 case ASPECT_8:
284 aspect = 8000;
285 break;
286 case ASPECT_5625:
287 aspect = 5625;
288 break;
289 }
290 x = (xres + 31) * 8;
291 y = x * aspect / 10000;
292 printf("\t%dx%d%c\t%d Hz\n", x, y,
293 x > 1000 ? ' ' : '\t', (vfreq & 0x3f) + 60);
294 have_timing = 1;
295 }
296 }
297
298 /* Detailed timing information. */
299 for (i = 0; i < ARRAY_SIZE(edid_info->monitor_details.descriptor);
300 i++) {
301 edid_print_dtd(&edid_info->monitor_details.descriptor[i],
302 &have_timing);
303 }
304
305 if (!have_timing)
306 printf("\tNone\n");
307}