3 * Pierre Aubert, Staubli Faverges , <p.aubert@staubli.com>
4 * Copyright 2011 Freescale Semiconductor, Inc.
6 * SPDX-License-Identifier: GPL-2.0+
9 /************************************************************************
10 Get Parameters for the video mode:
11 The default video mode can be defined in CONFIG_SYS_DEFAULT_VIDEO_MODE.
12 If undefined, default video mode is set to 0x301
13 Parameters can be set via the variable "videomode" in the environment.
14 2 diferent ways are possible:
15 "videomode=301" - 301 is a hexadecimal number describing the VESA
16 mode. Following modes are implemented:
18 Colors 640x480 800x600 1024x768 1152x864 1280x1024
19 --------+---------------------------------------------
20 8 bits | 0x301 0x303 0x305 0x161 0x307
21 15 bits | 0x310 0x313 0x316 0x162 0x319
22 16 bits | 0x311 0x314 0x317 0x163 0x31A
23 24 bits | 0x312 0x315 0x318 ? 0x31B
24 --------+---------------------------------------------
26 - the parameters are parsed from the bootargs.
27 The format is "NAME:VALUE,NAME:VALUE" etc.
29 "bootargs=video=ctfb:x:800,y:600,depth:16,pclk:25000"
30 Parameters not included in the list will be taken from
31 the default mode, which is one of the following:
39 if "mode" is not provided within the parameter list,
41 Following parameters are supported:
42 x xres = visible resolution horizontal
43 y yres = visible resolution vertical
44 pclk pixelclocks in pico sec
45 le left_marging time from sync to picture in pixelclocks
46 ri right_marging time from picture to sync in pixelclocks
47 up upper_margin time from sync to picture
49 hs hsync_len length of horizontal sync
50 vs vsync_len length of vertical sync
53 depth Color depth in bits per pixel
54 All other parameters in the variable bootargs are ignored.
55 It is also possible to set the parameters direct in the
56 variable "videomode", or in another variable i.e.
57 "myvideo" and setting the variable "videomode=myvideo"..
58 ****************************************************************************/
63 #include <linux/ctype.h>
65 #include "videomodes.h"
67 const struct ctfb_vesa_modes vesa_modes[VESA_MODES_COUNT] = {
68 {0x301, RES_MODE_640x480, 8},
69 {0x310, RES_MODE_640x480, 15},
70 {0x311, RES_MODE_640x480, 16},
71 {0x312, RES_MODE_640x480, 24},
72 {0x303, RES_MODE_800x600, 8},
73 {0x313, RES_MODE_800x600, 15},
74 {0x314, RES_MODE_800x600, 16},
75 {0x315, RES_MODE_800x600, 24},
76 {0x305, RES_MODE_1024x768, 8},
77 {0x316, RES_MODE_1024x768, 15},
78 {0x317, RES_MODE_1024x768, 16},
79 {0x318, RES_MODE_1024x768, 24},
80 {0x161, RES_MODE_1152x864, 8},
81 {0x162, RES_MODE_1152x864, 15},
82 {0x163, RES_MODE_1152x864, 16},
83 {0x307, RES_MODE_1280x1024, 8},
84 {0x319, RES_MODE_1280x1024, 15},
85 {0x31A, RES_MODE_1280x1024, 16},
86 {0x31B, RES_MODE_1280x1024, 24},
88 const struct ctfb_res_modes res_mode_init[RES_MODES_COUNT] = {
89 /* x y hz pixclk ps/kHz le ri up lo hs vs s vmode */
90 #ifndef CONFIG_VIDEO_STD_TIMINGS
91 { 640, 480, 60, 39721, 25180, 40, 24, 32, 11, 96, 2, 0, FB_VMODE_NONINTERLACED},
92 { 800, 600, 60, 27778, 36000, 64, 24, 22, 1, 72, 2, 0, FB_VMODE_NONINTERLACED},
93 {1024, 768, 60, 15384, 65000, 168, 8, 29, 3, 144, 4, 0, FB_VMODE_NONINTERLACED},
94 { 960, 720, 80, 13100, 76335, 160, 40, 32, 8, 80, 4, 0, FB_VMODE_NONINTERLACED},
95 {1152, 864, 60, 12004, 83300, 200, 64, 32, 16, 80, 4, 0, FB_VMODE_NONINTERLACED},
96 {1280, 1024, 60, 9090, 110000, 200, 48, 26, 1, 184, 3, 0, FB_VMODE_NONINTERLACED},
98 { 640, 480, 60, 39683, 25200, 48, 16, 33, 10, 96, 2, 0, FB_VMODE_NONINTERLACED},
99 { 800, 600, 60, 25000, 40000, 88, 40, 23, 1, 128, 4, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED},
100 {1024, 768, 60, 15384, 65000, 160, 24, 29, 3, 136, 6, 0, FB_VMODE_NONINTERLACED},
101 { 960, 720, 75, 13468, 74250, 176, 72, 27, 1, 112, 2, 0, FB_VMODE_NONINTERLACED},
102 {1152, 864, 75, 9259, 108000, 256, 64, 32, 1, 128, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED},
103 {1280, 1024, 60, 9259, 108000, 248, 48, 38, 1, 112, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED},
105 {1280, 720, 60, 13468, 74250, 220, 110, 20, 5, 40, 5, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED},
106 {1360, 768, 60, 11696, 85500, 256, 64, 17, 3, 112, 7, 0, FB_VMODE_NONINTERLACED},
107 {1920, 1080, 60, 6734, 148500, 148, 88, 36, 4, 44, 5, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED},
108 {1920, 1200, 60, 6494, 154000, 80, 48, 26, 3, 32, 6, FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED},
111 /************************************************************************
112 * Get Parameters for the video mode:
114 /*********************************************************************
115 * returns the length to the next seperator
118 video_get_param_len(const char *start, char sep)
121 while ((*start != 0) && (*start != sep)) {
129 video_search_param (char *start, char *param)
131 int len, totallen, i;
133 len = strlen (param);
134 totallen = len + strlen (start);
135 for (i = 0; i < totallen; i++) {
136 if (strncmp (p++, param, len) == 0)
142 /***************************************************************
143 * Get parameter via the environment as it is done for the
145 * video=ctfb:x:800,xv:1280,y:600,yv:1024,depth:16,mode:0,pclk:25000,
146 * le:56,ri:48,up:26,lo:5,hs:152,vs:2,sync:0,vmode:0,accel:0
148 * penv is a pointer to the environment, containing the string, or the name of
149 * another environment variable. It could even be the term "bootargs"
152 #define GET_OPTION(name,var) \
153 if(strncmp(p,name,strlen(name))==0) { \
154 val_s=p+strlen(name); \
155 var=simple_strtoul(val_s, NULL, 10); \
158 int video_get_params (struct ctfb_res_modes *pPar, char *penv)
165 /* first search for the environment containing the real param string */
168 if ((p = getenv (s)) != NULL)
172 * in case of the bootargs line, we have to start
173 * after "video=ctfb:"
175 i = video_search_param (s, "video=ctfb:");
178 s += strlen ("video=ctfb:");
180 /* search for mode as a default value */
182 mode = 0; /* default */
184 while ((i = video_get_param_len (p, ',')) != 0) {
185 GET_OPTION ("mode:", mode)
191 if (mode >= RES_MODES_COUNT)
194 *pPar = res_mode_init[mode]; /* copy default values */
195 bpp = 24 - ((mode % 3) * 8);
198 while ((i = video_get_param_len (p, ',')) != 0) {
199 GET_OPTION ("x:", pPar->xres)
200 GET_OPTION ("y:", pPar->yres)
201 GET_OPTION ("refresh:", pPar->refresh)
202 GET_OPTION ("le:", pPar->left_margin)
203 GET_OPTION ("ri:", pPar->right_margin)
204 GET_OPTION ("up:", pPar->upper_margin)
205 GET_OPTION ("lo:", pPar->lower_margin)
206 GET_OPTION ("hs:", pPar->hsync_len)
207 GET_OPTION ("vs:", pPar->vsync_len)
208 GET_OPTION ("sync:", pPar->sync)
209 GET_OPTION ("vmode:", pPar->vmode)
210 GET_OPTION ("pclk:", pPar->pixclock)
211 GET_OPTION ("pclk_khz:", pPar->pixclock_khz)
212 GET_OPTION ("depth:", bpp)
221 * Parse the 'video-mode' environment variable
223 * Example: "video-mode=fslfb:1280x1024-32@60,monitor=dvi". See
224 * doc/README.video for more information on how to set the variable.
226 * @xres: returned value of X-resolution
227 * @yres: returned value of Y-resolution
228 * @depth: returned value of color depth
229 * @freq: returned value of monitor frequency
230 * @options: pointer to any remaining options, or NULL
232 * Returns 1 if valid values were found, 0 otherwise
234 int video_get_video_mode(unsigned int *xres, unsigned int *yres,
235 unsigned int *depth, unsigned int *freq, const char **options)
237 char *p = getenv("video-mode");
241 /* Skip over the driver name, which we don't care about. */
246 /* Get the X-resolution*/
247 while (*p && !isdigit(*p))
249 *xres = simple_strtoul(p, &p, 10);
253 /* Get the Y-resolution */
254 while (*p && !isdigit(*p))
256 *yres = simple_strtoul(p, &p, 10);
261 while (*p && !isdigit(*p))
263 *depth = simple_strtoul(p, &p, 10);
267 /* Get the frequency */
268 while (*p && !isdigit(*p))
270 *freq = simple_strtoul(p, &p, 10);
274 /* Find the extra options, if any */
276 *options = p ? p + 1 : NULL;
282 * Parse the 'video-mode' environment variable using video_get_video_mode()
283 * and lookup the matching ctfb_res_modes in res_mode_init.
285 * @default_mode: RES_MODE_##x## define for the mode to store in mode_ret
286 * when 'video-mode' is not set or does not contain a valid mode
287 * @default_depth: depth to set when 'video-mode' is not set
288 * @mode_ret: pointer where the mode will be stored
289 * @depth_ret: pointer where the depth will be stored
290 * @options: pointer to any remaining options, or NULL
292 void video_get_ctfb_res_modes(int default_mode, unsigned int default_depth,
293 const struct ctfb_res_modes **mode_ret,
294 unsigned int *depth_ret,
295 const char **options)
297 unsigned int i, xres, yres, depth, refresh;
299 *mode_ret = &res_mode_init[default_mode];
300 *depth_ret = default_depth;
303 if (!video_get_video_mode(&xres, &yres, &depth, &refresh, options))
306 for (i = 0; i < RES_MODES_COUNT; i++) {
307 if (res_mode_init[i].xres == xres &&
308 res_mode_init[i].yres == yres &&
309 res_mode_init[i].refresh == refresh) {
310 *mode_ret = &res_mode_init[i];
316 printf("video-mode %dx%d-%d@%d not available, falling back to %dx%d-%d@%d\n",
317 xres, yres, depth, refresh, (*mode_ret)->xres,
318 (*mode_ret)->yres, *depth_ret, (*mode_ret)->refresh);
322 * Find the named string option within the ',' separated options string, and
323 * store its value in dest.
325 * @options: ',' separated options string
326 * @name: name of the option to look for
327 * @dest: destination buffer to store the value of the option in
328 * @dest_len: length of dest
329 * @def: value to store in dest if the option is not present in options
331 void video_get_option_string(const char *options, const char *name,
332 char *dest, int dest_len, const char *def)
334 const char *p = options;
335 const int name_len = strlen(name);
338 while (p && (i = video_get_param_len(p, ',')) != 0) {
339 if (strncmp(p, name, name_len) == 0 && p[name_len] == '=') {
340 len = i - (name_len + 1);
343 memcpy(dest, &p[name_len + 1], len);
355 * Find the named integer option within the ',' separated options string, and
358 * @options: ',' separated options string
359 * @name: name of the option to look for
360 * @def: value to return if the option is not present in options
362 int video_get_option_int(const char *options, const char *name, int def)
364 const char *p = options;
365 const int name_len = strlen(name);
368 while (p && (i = video_get_param_len(p, ',')) != 0) {
369 if (strncmp(p, name, name_len) == 0 && p[name_len] == '=')
370 return simple_strtoul(&p[name_len + 1], NULL, 10);
380 * Convert an EDID detailed timing to a struct ctfb_res_modes
382 * @param t The EDID detailed timing to be converted
383 * @param mode Returns the converted timing
385 * @return 0 on success, or a negative errno on error
387 int video_edid_dtd_to_ctfb_res_modes(struct edid_detailed_timing *t,
388 struct ctfb_res_modes *mode)
390 int margin, h_total, v_total;
392 /* Check all timings are non 0 */
393 if (EDID_DETAILED_TIMING_PIXEL_CLOCK(*t) == 0 ||
394 EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(*t) == 0 ||
395 EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(*t) == 0 ||
396 EDID_DETAILED_TIMING_VERTICAL_ACTIVE(*t) == 0 ||
397 EDID_DETAILED_TIMING_VERTICAL_BLANKING(*t) == 0 ||
398 EDID_DETAILED_TIMING_HSYNC_OFFSET(*t) == 0 ||
399 EDID_DETAILED_TIMING_HSYNC_PULSE_WIDTH(*t) == 0 ||
400 EDID_DETAILED_TIMING_VSYNC_OFFSET(*t) == 0 ||
401 EDID_DETAILED_TIMING_VSYNC_PULSE_WIDTH(*t) == 0 ||
402 /* 3d formats are not supported*/
403 EDID_DETAILED_TIMING_FLAG_STEREO(*t) != 0)
406 mode->xres = EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(*t);
407 mode->yres = EDID_DETAILED_TIMING_VERTICAL_ACTIVE(*t);
409 h_total = mode->xres + EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(*t);
410 v_total = mode->yres + EDID_DETAILED_TIMING_VERTICAL_BLANKING(*t);
411 mode->refresh = EDID_DETAILED_TIMING_PIXEL_CLOCK(*t) /
414 mode->pixclock_khz = EDID_DETAILED_TIMING_PIXEL_CLOCK(*t) / 1000;
415 mode->pixclock = 1000000000L / mode->pixclock_khz;
417 mode->right_margin = EDID_DETAILED_TIMING_HSYNC_OFFSET(*t);
418 mode->hsync_len = EDID_DETAILED_TIMING_HSYNC_PULSE_WIDTH(*t);
419 margin = EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(*t) -
420 (mode->right_margin + mode->hsync_len);
424 mode->left_margin = margin;
426 mode->lower_margin = EDID_DETAILED_TIMING_VSYNC_OFFSET(*t);
427 mode->vsync_len = EDID_DETAILED_TIMING_VSYNC_PULSE_WIDTH(*t);
428 margin = EDID_DETAILED_TIMING_VERTICAL_BLANKING(*t) -
429 (mode->lower_margin + mode->vsync_len);
433 mode->upper_margin = margin;
436 if (EDID_DETAILED_TIMING_FLAG_HSYNC_POLARITY(*t))
437 mode->sync |= FB_SYNC_HOR_HIGH_ACT;
438 if (EDID_DETAILED_TIMING_FLAG_VSYNC_POLARITY(*t))
439 mode->sync |= FB_SYNC_VERT_HIGH_ACT;
441 if (EDID_DETAILED_TIMING_FLAG_INTERLACED(*t))
442 mode->vmode = FB_VMODE_INTERLACED;
444 mode->vmode = FB_VMODE_NONINTERLACED;