1 // SPDX-License-Identifier: GPL-2.0+
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 ****************************************************************************/
64 #include <linux/ctype.h>
66 #include "videomodes.h"
68 const struct ctfb_vesa_modes vesa_modes[VESA_MODES_COUNT] = {
69 {0x301, RES_MODE_640x480, 8},
70 {0x310, RES_MODE_640x480, 15},
71 {0x311, RES_MODE_640x480, 16},
72 {0x312, RES_MODE_640x480, 24},
73 {0x303, RES_MODE_800x600, 8},
74 {0x313, RES_MODE_800x600, 15},
75 {0x314, RES_MODE_800x600, 16},
76 {0x315, RES_MODE_800x600, 24},
77 {0x305, RES_MODE_1024x768, 8},
78 {0x316, RES_MODE_1024x768, 15},
79 {0x317, RES_MODE_1024x768, 16},
80 {0x318, RES_MODE_1024x768, 24},
81 {0x161, RES_MODE_1152x864, 8},
82 {0x162, RES_MODE_1152x864, 15},
83 {0x163, RES_MODE_1152x864, 16},
84 {0x307, RES_MODE_1280x1024, 8},
85 {0x319, RES_MODE_1280x1024, 15},
86 {0x31A, RES_MODE_1280x1024, 16},
87 {0x31B, RES_MODE_1280x1024, 24},
89 const struct ctfb_res_modes res_mode_init[RES_MODES_COUNT] = {
90 /* x y hz pixclk ps/kHz le ri up lo hs vs s vmode */
91 #ifndef CONFIG_VIDEO_STD_TIMINGS
92 { 640, 480, 60, 39721, 25180, 40, 24, 32, 11, 96, 2, 0, FB_VMODE_NONINTERLACED},
93 { 800, 600, 60, 27778, 36000, 64, 24, 22, 1, 72, 2, 0, FB_VMODE_NONINTERLACED},
94 {1024, 768, 60, 15384, 65000, 168, 8, 29, 3, 144, 4, 0, FB_VMODE_NONINTERLACED},
95 { 960, 720, 80, 13100, 76335, 160, 40, 32, 8, 80, 4, 0, FB_VMODE_NONINTERLACED},
96 {1152, 864, 60, 12004, 83300, 200, 64, 32, 16, 80, 4, 0, FB_VMODE_NONINTERLACED},
97 {1280, 1024, 60, 9090, 110000, 200, 48, 26, 1, 184, 3, 0, FB_VMODE_NONINTERLACED},
99 { 640, 480, 60, 39683, 25200, 48, 16, 33, 10, 96, 2, 0, FB_VMODE_NONINTERLACED},
100 { 800, 600, 60, 25000, 40000, 88, 40, 23, 1, 128, 4, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED},
101 {1024, 768, 60, 15384, 65000, 160, 24, 29, 3, 136, 6, 0, FB_VMODE_NONINTERLACED},
102 { 960, 720, 75, 13468, 74250, 176, 72, 27, 1, 112, 2, 0, FB_VMODE_NONINTERLACED},
103 {1152, 864, 75, 9259, 108000, 256, 64, 32, 1, 128, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED},
104 {1280, 1024, 60, 9259, 108000, 248, 48, 38, 1, 112, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED},
106 {1280, 720, 60, 13468, 74250, 220, 110, 20, 5, 40, 5, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED},
107 {1360, 768, 60, 11696, 85500, 256, 64, 17, 3, 112, 7, 0, FB_VMODE_NONINTERLACED},
108 {1920, 1080, 60, 6734, 148500, 148, 88, 36, 4, 44, 5, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED},
109 {1920, 1200, 60, 6494, 154000, 80, 48, 26, 3, 32, 6, FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED},
112 /************************************************************************
113 * Get Parameters for the video mode:
115 /*********************************************************************
116 * returns the length to the next seperator
119 video_get_param_len(const char *start, char sep)
122 while ((*start != 0) && (*start != sep)) {
130 video_search_param (char *start, char *param)
132 int len, totallen, i;
134 len = strlen (param);
135 totallen = len + strlen (start);
136 for (i = 0; i < totallen; i++) {
137 if (strncmp (p++, param, len) == 0)
143 /***************************************************************
144 * Get parameter via the environment as it is done for the
146 * video=ctfb:x:800,xv:1280,y:600,yv:1024,depth:16,mode:0,pclk:25000,
147 * le:56,ri:48,up:26,lo:5,hs:152,vs:2,sync:0,vmode:0,accel:0
149 * penv is a pointer to the environment, containing the string, or the name of
150 * another environment variable. It could even be the term "bootargs"
153 #define GET_OPTION(name,var) \
154 if(strncmp(p,name,strlen(name))==0) { \
155 val_s=p+strlen(name); \
156 var=simple_strtoul(val_s, NULL, 10); \
159 int video_get_params (struct ctfb_res_modes *pPar, char *penv)
166 /* first search for the environment containing the real param string */
174 * in case of the bootargs line, we have to start
175 * after "video=ctfb:"
177 i = video_search_param (s, "video=ctfb:");
180 s += strlen ("video=ctfb:");
182 /* search for mode as a default value */
184 mode = 0; /* default */
186 while ((i = video_get_param_len (p, ',')) != 0) {
187 GET_OPTION ("mode:", mode)
193 if (mode >= RES_MODES_COUNT)
196 *pPar = res_mode_init[mode]; /* copy default values */
197 bpp = 24 - ((mode % 3) * 8);
200 while ((i = video_get_param_len (p, ',')) != 0) {
201 GET_OPTION ("x:", pPar->xres)
202 GET_OPTION ("y:", pPar->yres)
203 GET_OPTION ("refresh:", pPar->refresh)
204 GET_OPTION ("le:", pPar->left_margin)
205 GET_OPTION ("ri:", pPar->right_margin)
206 GET_OPTION ("up:", pPar->upper_margin)
207 GET_OPTION ("lo:", pPar->lower_margin)
208 GET_OPTION ("hs:", pPar->hsync_len)
209 GET_OPTION ("vs:", pPar->vsync_len)
210 GET_OPTION ("sync:", pPar->sync)
211 GET_OPTION ("vmode:", pPar->vmode)
212 GET_OPTION ("pclk:", pPar->pixclock)
213 GET_OPTION ("pclk_khz:", pPar->pixclock_khz)
214 GET_OPTION ("depth:", bpp)
223 * Parse the 'video-mode' environment variable
225 * Example: "video-mode=fslfb:1280x1024-32@60,monitor=dvi". See
226 * doc/README.video for more information on how to set the variable.
228 * @xres: returned value of X-resolution
229 * @yres: returned value of Y-resolution
230 * @depth: returned value of color depth
231 * @freq: returned value of monitor frequency
232 * @options: pointer to any remaining options, or NULL
234 * Returns 1 if valid values were found, 0 otherwise
236 int video_get_video_mode(unsigned int *xres, unsigned int *yres,
237 unsigned int *depth, unsigned int *freq, const char **options)
239 char *p = env_get("video-mode");
243 /* Skip over the driver name, which we don't care about. */
248 /* Get the X-resolution*/
249 while (*p && !isdigit(*p))
251 *xres = simple_strtoul(p, &p, 10);
255 /* Get the Y-resolution */
256 while (*p && !isdigit(*p))
258 *yres = simple_strtoul(p, &p, 10);
263 while (*p && !isdigit(*p))
265 *depth = simple_strtoul(p, &p, 10);
269 /* Get the frequency */
270 while (*p && !isdigit(*p))
272 *freq = simple_strtoul(p, &p, 10);
276 /* Find the extra options, if any */
278 *options = p ? p + 1 : NULL;
284 * Parse the 'video-mode' environment variable using video_get_video_mode()
285 * and lookup the matching ctfb_res_modes in res_mode_init.
287 * @default_mode: RES_MODE_##x## define for the mode to store in mode_ret
288 * when 'video-mode' is not set or does not contain a valid mode
289 * @default_depth: depth to set when 'video-mode' is not set
290 * @mode_ret: pointer where the mode will be stored
291 * @depth_ret: pointer where the depth will be stored
292 * @options: pointer to any remaining options, or NULL
294 void video_get_ctfb_res_modes(int default_mode, unsigned int default_depth,
295 const struct ctfb_res_modes **mode_ret,
296 unsigned int *depth_ret,
297 const char **options)
299 unsigned int i, xres, yres, depth, refresh;
301 *mode_ret = &res_mode_init[default_mode];
302 *depth_ret = default_depth;
305 if (!video_get_video_mode(&xres, &yres, &depth, &refresh, options))
308 for (i = 0; i < RES_MODES_COUNT; i++) {
309 if (res_mode_init[i].xres == xres &&
310 res_mode_init[i].yres == yres &&
311 res_mode_init[i].refresh == refresh) {
312 *mode_ret = &res_mode_init[i];
318 printf("video-mode %dx%d-%d@%d not available, falling back to %dx%d-%d@%d\n",
319 xres, yres, depth, refresh, (*mode_ret)->xres,
320 (*mode_ret)->yres, *depth_ret, (*mode_ret)->refresh);
324 * Find the named string option within the ',' separated options string, and
325 * store its value in dest.
327 * @options: ',' separated options string
328 * @name: name of the option to look for
329 * @dest: destination buffer to store the value of the option in
330 * @dest_len: length of dest
331 * @def: value to store in dest if the option is not present in options
333 void video_get_option_string(const char *options, const char *name,
334 char *dest, int dest_len, const char *def)
336 const char *p = options;
337 const int name_len = strlen(name);
340 while (p && (i = video_get_param_len(p, ',')) != 0) {
341 if (strncmp(p, name, name_len) == 0 && p[name_len] == '=') {
342 len = i - (name_len + 1);
345 memcpy(dest, &p[name_len + 1], len);
357 * Find the named integer option within the ',' separated options string, and
360 * @options: ',' separated options string
361 * @name: name of the option to look for
362 * @def: value to return if the option is not present in options
364 int video_get_option_int(const char *options, const char *name, int def)
366 const char *p = options;
367 const int name_len = strlen(name);
370 while (p && (i = video_get_param_len(p, ',')) != 0) {
371 if (strncmp(p, name, name_len) == 0 && p[name_len] == '=')
372 return simple_strtoul(&p[name_len + 1], NULL, 10);
382 * Convert an EDID detailed timing to a struct ctfb_res_modes
384 * @param t The EDID detailed timing to be converted
385 * @param mode Returns the converted timing
387 * @return 0 on success, or a negative errno on error
389 int video_edid_dtd_to_ctfb_res_modes(struct edid_detailed_timing *t,
390 struct ctfb_res_modes *mode)
392 int margin, h_total, v_total;
394 /* Check all timings are non 0 */
395 if (EDID_DETAILED_TIMING_PIXEL_CLOCK(*t) == 0 ||
396 EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(*t) == 0 ||
397 EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(*t) == 0 ||
398 EDID_DETAILED_TIMING_VERTICAL_ACTIVE(*t) == 0 ||
399 EDID_DETAILED_TIMING_VERTICAL_BLANKING(*t) == 0 ||
400 EDID_DETAILED_TIMING_HSYNC_OFFSET(*t) == 0 ||
401 EDID_DETAILED_TIMING_VSYNC_OFFSET(*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;
449 void video_ctfb_mode_to_display_timing(const struct ctfb_res_modes *mode,
450 struct display_timing *timing)
452 timing->pixelclock.typ = mode->pixclock_khz * 1000;
454 timing->hactive.typ = mode->xres;
455 timing->hfront_porch.typ = mode->right_margin;
456 timing->hback_porch.typ = mode->left_margin;
457 timing->hsync_len.typ = mode->hsync_len;
459 timing->vactive.typ = mode->yres;
460 timing->vfront_porch.typ = mode->lower_margin;
461 timing->vback_porch.typ = mode->upper_margin;
462 timing->vsync_len.typ = mode->vsync_len;
466 if (mode->sync & FB_SYNC_HOR_HIGH_ACT)
467 timing->flags |= DISPLAY_FLAGS_HSYNC_HIGH;
469 timing->flags |= DISPLAY_FLAGS_HSYNC_LOW;
470 if (mode->sync & FB_SYNC_VERT_HIGH_ACT)
471 timing->flags |= DISPLAY_FLAGS_VSYNC_HIGH;
473 timing->flags |= DISPLAY_FLAGS_VSYNC_LOW;
474 if (mode->vmode == FB_VMODE_INTERLACED)
475 timing->flags |= DISPLAY_FLAGS_INTERLACED;