1 // SPDX-License-Identifier: GPL-2.0+
4 * Pierre Aubert, Staubli Faverges , <p.aubert@staubli.com>
5 * Copyright 2011 Freescale Semiconductor, Inc.
8 /************************************************************************
9 Get Parameters for the video mode:
10 The default video mode can be defined in CONFIG_SYS_DEFAULT_VIDEO_MODE.
11 If undefined, default video mode is set to 0x301
12 Parameters can be set via the variable "videomode" in the environment.
13 2 diferent ways are possible:
14 "videomode=301" - 301 is a hexadecimal number describing the VESA
15 mode. Following modes are implemented:
17 Colors 640x480 800x600 1024x768 1152x864 1280x1024
18 --------+---------------------------------------------
19 8 bits | 0x301 0x303 0x305 0x161 0x307
20 15 bits | 0x310 0x313 0x316 0x162 0x319
21 16 bits | 0x311 0x314 0x317 0x163 0x31A
22 24 bits | 0x312 0x315 0x318 ? 0x31B
23 --------+---------------------------------------------
25 - the parameters are parsed from the bootargs.
26 The format is "NAME:VALUE,NAME:VALUE" etc.
28 "bootargs=video=ctfb:x:800,y:600,depth:16,pclk:25000"
29 Parameters not included in the list will be taken from
30 the default mode, which is one of the following:
38 if "mode" is not provided within the parameter list,
40 Following parameters are supported:
41 x xres = visible resolution horizontal
42 y yres = visible resolution vertical
43 pclk pixelclocks in pico sec
44 le left_marging time from sync to picture in pixelclocks
45 ri right_marging time from picture to sync in pixelclocks
46 up upper_margin time from sync to picture
48 hs hsync_len length of horizontal sync
49 vs vsync_len length of vertical sync
52 depth Color depth in bits per pixel
53 All other parameters in the variable bootargs are ignored.
54 It is also possible to set the parameters direct in the
55 variable "videomode", or in another variable i.e.
56 "myvideo" and setting the variable "videomode=myvideo"..
57 ****************************************************************************/
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 */
173 * in case of the bootargs line, we have to start
174 * after "video=ctfb:"
176 i = video_search_param (s, "video=ctfb:");
179 s += strlen ("video=ctfb:");
181 /* search for mode as a default value */
183 mode = 0; /* default */
185 while ((i = video_get_param_len (p, ',')) != 0) {
186 GET_OPTION ("mode:", mode)
192 if (mode >= RES_MODES_COUNT)
195 *pPar = res_mode_init[mode]; /* copy default values */
196 bpp = 24 - ((mode % 3) * 8);
199 while ((i = video_get_param_len (p, ',')) != 0) {
200 GET_OPTION ("x:", pPar->xres)
201 GET_OPTION ("y:", pPar->yres)
202 GET_OPTION ("refresh:", pPar->refresh)
203 GET_OPTION ("le:", pPar->left_margin)
204 GET_OPTION ("ri:", pPar->right_margin)
205 GET_OPTION ("up:", pPar->upper_margin)
206 GET_OPTION ("lo:", pPar->lower_margin)
207 GET_OPTION ("hs:", pPar->hsync_len)
208 GET_OPTION ("vs:", pPar->vsync_len)
209 GET_OPTION ("sync:", pPar->sync)
210 GET_OPTION ("vmode:", pPar->vmode)
211 GET_OPTION ("pclk:", pPar->pixclock)
212 GET_OPTION ("pclk_khz:", pPar->pixclock_khz)
213 GET_OPTION ("depth:", bpp)
222 * Parse the 'video-mode' environment variable
224 * Example: "video-mode=fslfb:1280x1024-32@60,monitor=dvi". See
225 * doc/README.video for more information on how to set the variable.
227 * @xres: returned value of X-resolution
228 * @yres: returned value of Y-resolution
229 * @depth: returned value of color depth
230 * @freq: returned value of monitor frequency
231 * @options: pointer to any remaining options, or NULL
233 * Returns 1 if valid values were found, 0 otherwise
235 int video_get_video_mode(unsigned int *xres, unsigned int *yres,
236 unsigned int *depth, unsigned int *freq, const char **options)
238 char *p = env_get("video-mode");
242 /* Skip over the driver name, which we don't care about. */
247 /* Get the X-resolution*/
248 while (*p && !isdigit(*p))
250 *xres = simple_strtoul(p, &p, 10);
254 /* Get the Y-resolution */
255 while (*p && !isdigit(*p))
257 *yres = simple_strtoul(p, &p, 10);
262 while (*p && !isdigit(*p))
264 *depth = simple_strtoul(p, &p, 10);
268 /* Get the frequency */
269 while (*p && !isdigit(*p))
271 *freq = simple_strtoul(p, &p, 10);
275 /* Find the extra options, if any */
277 *options = p ? p + 1 : NULL;
283 * Parse the 'video-mode' environment variable using video_get_video_mode()
284 * and lookup the matching ctfb_res_modes in res_mode_init.
286 * @default_mode: RES_MODE_##x## define for the mode to store in mode_ret
287 * when 'video-mode' is not set or does not contain a valid mode
288 * @default_depth: depth to set when 'video-mode' is not set
289 * @mode_ret: pointer where the mode will be stored
290 * @depth_ret: pointer where the depth will be stored
291 * @options: pointer to any remaining options, or NULL
293 void video_get_ctfb_res_modes(int default_mode, unsigned int default_depth,
294 const struct ctfb_res_modes **mode_ret,
295 unsigned int *depth_ret,
296 const char **options)
298 unsigned int i, xres, yres, depth, refresh;
300 *mode_ret = &res_mode_init[default_mode];
301 *depth_ret = default_depth;
304 if (!video_get_video_mode(&xres, &yres, &depth, &refresh, options))
307 for (i = 0; i < RES_MODES_COUNT; i++) {
308 if (res_mode_init[i].xres == xres &&
309 res_mode_init[i].yres == yres &&
310 res_mode_init[i].refresh == refresh) {
311 *mode_ret = &res_mode_init[i];
317 printf("video-mode %dx%d-%d@%d not available, falling back to %dx%d-%d@%d\n",
318 xres, yres, depth, refresh, (*mode_ret)->xres,
319 (*mode_ret)->yres, *depth_ret, (*mode_ret)->refresh);
323 * Find the named string option within the ',' separated options string, and
324 * store its value in dest.
326 * @options: ',' separated options string
327 * @name: name of the option to look for
328 * @dest: destination buffer to store the value of the option in
329 * @dest_len: length of dest
330 * @def: value to store in dest if the option is not present in options
332 void video_get_option_string(const char *options, const char *name,
333 char *dest, int dest_len, const char *def)
335 const char *p = options;
336 const int name_len = strlen(name);
339 while (p && (i = video_get_param_len(p, ',')) != 0) {
340 if (strncmp(p, name, name_len) == 0 && p[name_len] == '=') {
341 len = i - (name_len + 1);
344 memcpy(dest, &p[name_len + 1], len);
356 * Find the named integer option within the ',' separated options string, and
359 * @options: ',' separated options string
360 * @name: name of the option to look for
361 * @def: value to return if the option is not present in options
363 int video_get_option_int(const char *options, const char *name, int def)
365 const char *p = options;
366 const int name_len = strlen(name);
369 while (p && (i = video_get_param_len(p, ',')) != 0) {
370 if (strncmp(p, name, name_len) == 0 && p[name_len] == '=')
371 return simple_strtoul(&p[name_len + 1], NULL, 10);
381 * Convert an EDID detailed timing to a struct ctfb_res_modes
383 * @param t The EDID detailed timing to be converted
384 * @param mode Returns the converted timing
386 * @return 0 on success, or a negative errno on error
388 int video_edid_dtd_to_ctfb_res_modes(struct edid_detailed_timing *t,
389 struct ctfb_res_modes *mode)
391 int margin, h_total, v_total;
393 /* Check all timings are non 0 */
394 if (EDID_DETAILED_TIMING_PIXEL_CLOCK(*t) == 0 ||
395 EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(*t) == 0 ||
396 EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(*t) == 0 ||
397 EDID_DETAILED_TIMING_VERTICAL_ACTIVE(*t) == 0 ||
398 EDID_DETAILED_TIMING_VERTICAL_BLANKING(*t) == 0 ||
399 EDID_DETAILED_TIMING_HSYNC_OFFSET(*t) == 0 ||
400 EDID_DETAILED_TIMING_VSYNC_OFFSET(*t) == 0 ||
401 /* 3d formats are not supported */
402 EDID_DETAILED_TIMING_FLAG_STEREO(*t) != 0)
405 mode->xres = EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(*t);
406 mode->yres = EDID_DETAILED_TIMING_VERTICAL_ACTIVE(*t);
408 h_total = mode->xres + EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(*t);
409 v_total = mode->yres + EDID_DETAILED_TIMING_VERTICAL_BLANKING(*t);
410 mode->refresh = EDID_DETAILED_TIMING_PIXEL_CLOCK(*t) /
413 mode->pixclock_khz = EDID_DETAILED_TIMING_PIXEL_CLOCK(*t) / 1000;
414 mode->pixclock = 1000000000L / mode->pixclock_khz;
416 mode->right_margin = EDID_DETAILED_TIMING_HSYNC_OFFSET(*t);
417 mode->hsync_len = EDID_DETAILED_TIMING_HSYNC_PULSE_WIDTH(*t);
418 margin = EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(*t) -
419 (mode->right_margin + mode->hsync_len);
423 mode->left_margin = margin;
425 mode->lower_margin = EDID_DETAILED_TIMING_VSYNC_OFFSET(*t);
426 mode->vsync_len = EDID_DETAILED_TIMING_VSYNC_PULSE_WIDTH(*t);
427 margin = EDID_DETAILED_TIMING_VERTICAL_BLANKING(*t) -
428 (mode->lower_margin + mode->vsync_len);
432 mode->upper_margin = margin;
435 if (EDID_DETAILED_TIMING_FLAG_HSYNC_POLARITY(*t))
436 mode->sync |= FB_SYNC_HOR_HIGH_ACT;
437 if (EDID_DETAILED_TIMING_FLAG_VSYNC_POLARITY(*t))
438 mode->sync |= FB_SYNC_VERT_HIGH_ACT;
440 if (EDID_DETAILED_TIMING_FLAG_INTERLACED(*t))
441 mode->vmode = FB_VMODE_INTERLACED;
443 mode->vmode = FB_VMODE_NONINTERLACED;
448 void video_ctfb_mode_to_display_timing(const struct ctfb_res_modes *mode,
449 struct display_timing *timing)
451 timing->pixelclock.typ = mode->pixclock_khz * 1000;
453 timing->hactive.typ = mode->xres;
454 timing->hfront_porch.typ = mode->right_margin;
455 timing->hback_porch.typ = mode->left_margin;
456 timing->hsync_len.typ = mode->hsync_len;
458 timing->vactive.typ = mode->yres;
459 timing->vfront_porch.typ = mode->lower_margin;
460 timing->vback_porch.typ = mode->upper_margin;
461 timing->vsync_len.typ = mode->vsync_len;
465 if (mode->sync & FB_SYNC_HOR_HIGH_ACT)
466 timing->flags |= DISPLAY_FLAGS_HSYNC_HIGH;
468 timing->flags |= DISPLAY_FLAGS_HSYNC_LOW;
469 if (mode->sync & FB_SYNC_VERT_HIGH_ACT)
470 timing->flags |= DISPLAY_FLAGS_VSYNC_HIGH;
472 timing->flags |= DISPLAY_FLAGS_VSYNC_LOW;
473 if (mode->vmode == FB_VMODE_INTERLACED)
474 timing->flags |= DISPLAY_FLAGS_INTERLACED;