2 * linux/drivers/video/modedb.c -- Standard video mode database management
4 * Copyright (C) 1999 Geert Uytterhoeven
6 * 2001 - Documented with DocBook
7 * - Brad Douglas <brad@neruo.com>
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file COPYING in the main directory of this archive for
14 #include <linux/module.h>
15 #include <linux/tty.h>
17 #include <linux/sched.h>
21 #define name_matches(v, s, l) \
22 ((v).name && !strncmp((s), (v).name, (l)) && strlen((v).name) == (l))
23 #define res_matches(v, x, y) \
24 ((v).xres == (x) && (v).yres == (y))
27 #define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
29 #define DPRINTK(fmt, args...)
33 const char *global_mode_option = NULL;
37 * Standard video mode definitions (taken from XFree86)
40 #define DEFAULT_MODEDB_INDEX 0
42 static const struct fb_videomode modedb[] = {
44 /* 640x400 @ 70 Hz, 31.5 kHz hsync */
45 NULL, 70, 640, 400, 39721, 40, 24, 39, 9, 96, 2,
46 0, FB_VMODE_NONINTERLACED
48 /* 640x480 @ 60 Hz, 31.5 kHz hsync */
49 NULL, 60, 640, 480, 39721, 40, 24, 32, 11, 96, 2,
50 0, FB_VMODE_NONINTERLACED
52 /* 800x600 @ 56 Hz, 35.15 kHz hsync */
53 NULL, 56, 800, 600, 27777, 128, 24, 22, 1, 72, 2,
54 0, FB_VMODE_NONINTERLACED
56 /* 1024x768 @ 87 Hz interlaced, 35.5 kHz hsync */
57 NULL, 87, 1024, 768, 22271, 56, 24, 33, 8, 160, 8,
58 0, FB_VMODE_INTERLACED
60 /* 640x400 @ 85 Hz, 37.86 kHz hsync */
61 NULL, 85, 640, 400, 31746, 96, 32, 41, 1, 64, 3,
62 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
64 /* 640x480 @ 72 Hz, 36.5 kHz hsync */
65 NULL, 72, 640, 480, 31746, 144, 40, 30, 8, 40, 3,
66 0, FB_VMODE_NONINTERLACED
68 /* 640x480 @ 75 Hz, 37.50 kHz hsync */
69 NULL, 75, 640, 480, 31746, 120, 16, 16, 1, 64, 3,
70 0, FB_VMODE_NONINTERLACED
72 /* 800x600 @ 60 Hz, 37.8 kHz hsync */
73 NULL, 60, 800, 600, 25000, 88, 40, 23, 1, 128, 4,
74 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
76 /* 640x480 @ 85 Hz, 43.27 kHz hsync */
77 NULL, 85, 640, 480, 27777, 80, 56, 25, 1, 56, 3,
78 0, FB_VMODE_NONINTERLACED
80 /* 1152x864 @ 89 Hz interlaced, 44 kHz hsync */
81 NULL, 69, 1152, 864, 15384, 96, 16, 110, 1, 216, 10,
82 0, FB_VMODE_INTERLACED
84 /* 800x600 @ 72 Hz, 48.0 kHz hsync */
85 NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
86 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
88 /* 1024x768 @ 60 Hz, 48.4 kHz hsync */
89 NULL, 60, 1024, 768, 15384, 168, 8, 29, 3, 144, 6,
90 0, FB_VMODE_NONINTERLACED
92 /* 640x480 @ 100 Hz, 53.01 kHz hsync */
93 NULL, 100, 640, 480, 21834, 96, 32, 36, 8, 96, 6,
94 0, FB_VMODE_NONINTERLACED
96 /* 1152x864 @ 60 Hz, 53.5 kHz hsync */
97 NULL, 60, 1152, 864, 11123, 208, 64, 16, 4, 256, 8,
98 0, FB_VMODE_NONINTERLACED
100 /* 800x600 @ 85 Hz, 55.84 kHz hsync */
101 NULL, 85, 800, 600, 16460, 160, 64, 36, 16, 64, 5,
102 0, FB_VMODE_NONINTERLACED
104 /* 1024x768 @ 70 Hz, 56.5 kHz hsync */
105 NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6,
106 0, FB_VMODE_NONINTERLACED
108 /* 1280x1024 @ 87 Hz interlaced, 51 kHz hsync */
109 NULL, 87, 1280, 1024, 12500, 56, 16, 128, 1, 216, 12,
110 0, FB_VMODE_INTERLACED
112 /* 800x600 @ 100 Hz, 64.02 kHz hsync */
113 NULL, 100, 800, 600, 14357, 160, 64, 30, 4, 64, 6,
114 0, FB_VMODE_NONINTERLACED
116 /* 1024x768 @ 76 Hz, 62.5 kHz hsync */
117 NULL, 76, 1024, 768, 11764, 208, 8, 36, 16, 120, 3,
118 0, FB_VMODE_NONINTERLACED
120 /* 1152x864 @ 70 Hz, 62.4 kHz hsync */
121 NULL, 70, 1152, 864, 10869, 106, 56, 20, 1, 160, 10,
122 0, FB_VMODE_NONINTERLACED
124 /* 1280x1024 @ 61 Hz, 64.2 kHz hsync */
125 NULL, 61, 1280, 1024, 9090, 200, 48, 26, 1, 184, 3,
126 0, FB_VMODE_NONINTERLACED
128 /* 1400x1050 @ 60Hz, 63.9 kHz hsync */
129 NULL, 68, 1400, 1050, 9259, 136, 40, 13, 1, 112, 3,
130 0, FB_VMODE_NONINTERLACED
132 /* 1400x1050 @ 75,107 Hz, 82,392 kHz +hsync +vsync*/
133 NULL, 75, 1400, 1050, 9271, 120, 56, 13, 0, 112, 3,
134 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
136 /* 1400x1050 @ 60 Hz, ? kHz +hsync +vsync*/
137 NULL, 60, 1400, 1050, 9259, 128, 40, 12, 0, 112, 3,
138 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
140 /* 1024x768 @ 85 Hz, 70.24 kHz hsync */
141 NULL, 85, 1024, 768, 10111, 192, 32, 34, 14, 160, 6,
142 0, FB_VMODE_NONINTERLACED
144 /* 1152x864 @ 78 Hz, 70.8 kHz hsync */
145 NULL, 78, 1152, 864, 9090, 228, 88, 32, 0, 84, 12,
146 0, FB_VMODE_NONINTERLACED
148 /* 1280x1024 @ 70 Hz, 74.59 kHz hsync */
149 NULL, 70, 1280, 1024, 7905, 224, 32, 28, 8, 160, 8,
150 0, FB_VMODE_NONINTERLACED
152 /* 1600x1200 @ 60Hz, 75.00 kHz hsync */
153 NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
154 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
156 /* 1152x864 @ 84 Hz, 76.0 kHz hsync */
157 NULL, 84, 1152, 864, 7407, 184, 312, 32, 0, 128, 12,
158 0, FB_VMODE_NONINTERLACED
160 /* 1280x1024 @ 74 Hz, 78.85 kHz hsync */
161 NULL, 74, 1280, 1024, 7407, 256, 32, 34, 3, 144, 3,
162 0, FB_VMODE_NONINTERLACED
164 /* 1024x768 @ 100Hz, 80.21 kHz hsync */
165 NULL, 100, 1024, 768, 8658, 192, 32, 21, 3, 192, 10,
166 0, FB_VMODE_NONINTERLACED
168 /* 1280x1024 @ 76 Hz, 81.13 kHz hsync */
169 NULL, 76, 1280, 1024, 7407, 248, 32, 34, 3, 104, 3,
170 0, FB_VMODE_NONINTERLACED
172 /* 1600x1200 @ 70 Hz, 87.50 kHz hsync */
173 NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
174 0, FB_VMODE_NONINTERLACED
176 /* 1152x864 @ 100 Hz, 89.62 kHz hsync */
177 NULL, 100, 1152, 864, 7264, 224, 32, 17, 2, 128, 19,
178 0, FB_VMODE_NONINTERLACED
180 /* 1280x1024 @ 85 Hz, 91.15 kHz hsync */
181 NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
182 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
184 /* 1600x1200 @ 75 Hz, 93.75 kHz hsync */
185 NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
186 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
188 /* 1600x1200 @ 85 Hz, 105.77 kHz hsync */
189 NULL, 85, 1600, 1200, 4545, 272, 16, 37, 4, 192, 3,
190 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
192 /* 1280x1024 @ 100 Hz, 107.16 kHz hsync */
193 NULL, 100, 1280, 1024, 5502, 256, 32, 26, 7, 128, 15,
194 0, FB_VMODE_NONINTERLACED
196 /* 1800x1440 @ 64Hz, 96.15 kHz hsync */
197 NULL, 64, 1800, 1440, 4347, 304, 96, 46, 1, 192, 3,
198 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
200 /* 1800x1440 @ 70Hz, 104.52 kHz hsync */
201 NULL, 70, 1800, 1440, 4000, 304, 96, 46, 1, 192, 3,
202 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
204 /* 512x384 @ 78 Hz, 31.50 kHz hsync */
205 NULL, 78, 512, 384, 49603, 48, 16, 16, 1, 64, 3,
206 0, FB_VMODE_NONINTERLACED
208 /* 512x384 @ 85 Hz, 34.38 kHz hsync */
209 NULL, 85, 512, 384, 45454, 48, 16, 16, 1, 64, 3,
210 0, FB_VMODE_NONINTERLACED
212 /* 320x200 @ 70 Hz, 31.5 kHz hsync, 8:5 aspect ratio */
213 NULL, 70, 320, 200, 79440, 16, 16, 20, 4, 48, 1,
216 /* 320x240 @ 60 Hz, 31.5 kHz hsync, 4:3 aspect ratio */
217 NULL, 60, 320, 240, 79440, 16, 16, 16, 5, 48, 1,
220 /* 320x240 @ 72 Hz, 36.5 kHz hsync */
221 NULL, 72, 320, 240, 63492, 16, 16, 16, 4, 48, 2,
224 /* 400x300 @ 56 Hz, 35.2 kHz hsync, 4:3 aspect ratio */
225 NULL, 56, 400, 300, 55555, 64, 16, 10, 1, 32, 1,
228 /* 400x300 @ 60 Hz, 37.8 kHz hsync */
229 NULL, 60, 400, 300, 50000, 48, 16, 11, 1, 64, 2,
232 /* 400x300 @ 72 Hz, 48.0 kHz hsync */
233 NULL, 72, 400, 300, 40000, 32, 24, 11, 19, 64, 3,
236 /* 480x300 @ 56 Hz, 35.2 kHz hsync, 8:5 aspect ratio */
237 NULL, 56, 480, 300, 46176, 80, 16, 10, 1, 40, 1,
240 /* 480x300 @ 60 Hz, 37.8 kHz hsync */
241 NULL, 60, 480, 300, 41858, 56, 16, 11, 1, 80, 2,
244 /* 480x300 @ 63 Hz, 39.6 kHz hsync */
245 NULL, 63, 480, 300, 40000, 56, 16, 11, 1, 80, 2,
248 /* 480x300 @ 72 Hz, 48.0 kHz hsync */
249 NULL, 72, 480, 300, 33386, 40, 24, 11, 19, 80, 3,
254 const struct fb_videomode vesa_modes[] = {
255 /* 0 640x350-85 VESA */
256 { NULL, 85, 640, 350, 31746, 96, 32, 60, 32, 64, 3,
257 FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA},
258 /* 1 640x400-85 VESA */
259 { NULL, 85, 640, 400, 31746, 96, 32, 41, 01, 64, 3,
260 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
261 /* 2 720x400-85 VESA */
262 { NULL, 85, 721, 400, 28169, 108, 36, 42, 01, 72, 3,
263 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
264 /* 3 640x480-60 VESA */
265 { NULL, 60, 640, 480, 39682, 48, 16, 33, 10, 96, 2,
266 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
267 /* 4 640x480-72 VESA */
268 { NULL, 72, 640, 480, 31746, 128, 24, 29, 9, 40, 2,
269 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
270 /* 5 640x480-75 VESA */
271 { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
272 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
273 /* 6 640x480-85 VESA */
274 { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
275 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
276 /* 7 800x600-56 VESA */
277 { NULL, 56, 800, 600, 27777, 128, 24, 22, 01, 72, 2,
278 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
279 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
280 /* 8 800x600-60 VESA */
281 { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
282 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
283 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
284 /* 9 800x600-72 VESA */
285 { NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
286 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
287 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
288 /* 10 800x600-75 VESA */
289 { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
290 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
291 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
292 /* 11 800x600-85 VESA */
293 { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
294 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
295 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
296 /* 12 1024x768i-43 VESA */
297 { NULL, 53, 1024, 768, 22271, 56, 8, 41, 0, 176, 8,
298 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
299 FB_VMODE_INTERLACED, FB_MODE_IS_VESA },
300 /* 13 1024x768-60 VESA */
301 { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
302 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
303 /* 14 1024x768-70 VESA */
304 { NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6,
305 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
306 /* 15 1024x768-75 VESA */
307 { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
308 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
309 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
310 /* 16 1024x768-85 VESA */
311 { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
312 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
313 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
314 /* 17 1152x864-75 VESA */
315 { NULL, 75, 1153, 864, 9259, 256, 64, 32, 1, 128, 3,
316 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
317 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
318 /* 18 1280x960-60 VESA */
319 { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
320 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
321 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
322 /* 19 1280x960-85 VESA */
323 { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
324 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
325 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
326 /* 20 1280x1024-60 VESA */
327 { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
328 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
329 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
330 /* 21 1280x1024-75 VESA */
331 { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
332 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
333 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
334 /* 22 1280x1024-85 VESA */
335 { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
336 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
337 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
338 /* 23 1600x1200-60 VESA */
339 { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
340 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
341 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
342 /* 24 1600x1200-65 VESA */
343 { NULL, 65, 1600, 1200, 5698, 304, 64, 46, 1, 192, 3,
344 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
345 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
346 /* 25 1600x1200-70 VESA */
347 { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
348 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
349 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
350 /* 26 1600x1200-75 VESA */
351 { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
352 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
353 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
354 /* 27 1600x1200-85 VESA */
355 { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
356 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
357 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
358 /* 28 1792x1344-60 VESA */
359 { NULL, 60, 1792, 1344, 4882, 328, 128, 46, 1, 200, 3,
360 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
361 /* 29 1792x1344-75 VESA */
362 { NULL, 75, 1792, 1344, 3831, 352, 96, 69, 1, 216, 3,
363 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
364 /* 30 1856x1392-60 VESA */
365 { NULL, 60, 1856, 1392, 4580, 352, 96, 43, 1, 224, 3,
366 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
367 /* 31 1856x1392-75 VESA */
368 { NULL, 75, 1856, 1392, 3472, 352, 128, 104, 1, 224, 3,
369 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
370 /* 32 1920x1440-60 VESA */
371 { NULL, 60, 1920, 1440, 4273, 344, 128, 56, 1, 200, 3,
372 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
373 /* 33 1920x1440-75 VESA */
374 { NULL, 60, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3,
375 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
378 static int my_atoi(const char *name)
385 val = 10*val+(*name-'0');
394 * __fb_try_mode - test a video mode
395 * @var: frame buffer user defined part of display
396 * @info: frame buffer info structure
397 * @mode: frame buffer video mode structure
398 * @bpp: color depth in bits per pixel
400 * Tries a video mode to test it's validity for device @info.
402 * Returns 1 on success.
406 int __fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
407 const struct fb_videomode *mode, unsigned int bpp)
411 DPRINTK("Trying mode %s %dx%d-%d@%d\n", mode->name ? mode->name : "noname",
412 mode->xres, mode->yres, bpp, mode->refresh);
413 var->xres = mode->xres;
414 var->yres = mode->yres;
415 var->xres_virtual = mode->xres;
416 var->yres_virtual = mode->yres;
419 var->bits_per_pixel = bpp;
420 var->activate |= FB_ACTIVATE_TEST;
421 var->pixclock = mode->pixclock;
422 var->left_margin = mode->left_margin;
423 var->right_margin = mode->right_margin;
424 var->upper_margin = mode->upper_margin;
425 var->lower_margin = mode->lower_margin;
426 var->hsync_len = mode->hsync_len;
427 var->vsync_len = mode->vsync_len;
428 var->sync = mode->sync;
429 var->vmode = mode->vmode;
430 if (info->fbops->fb_check_var)
431 err = info->fbops->fb_check_var(var, info);
432 var->activate &= ~FB_ACTIVATE_TEST;
438 * fb_find_mode - finds a valid video mode
439 * @var: frame buffer user defined part of display
440 * @info: frame buffer info structure
441 * @mode_option: string video mode to find
442 * @db: video mode database
443 * @dbsize: size of @db
444 * @default_mode: default video mode to fall back to
445 * @default_bpp: default color depth in bits per pixel
447 * Finds a suitable video mode, starting with the specified mode
448 * in @mode_option with fallback to @default_mode. If
449 * @default_mode fails, all modes in the video mode database will
452 * Valid mode specifiers for @mode_option:
454 * <xres>x<yres>[-<bpp>][@<refresh>] or
455 * <name>[-<bpp>][@<refresh>]
457 * with <xres>, <yres>, <bpp> and <refresh> decimal numbers and
460 * NOTE: The passed struct @var is _not_ cleared! This allows you
461 * to supply values for e.g. the grayscale and accel_flags fields.
463 * Returns zero for failure, 1 if using specified @mode_option,
464 * 2 if using specified @mode_option with an ignored refresh rate,
465 * 3 if default mode is used, 4 if fall back to any valid mode.
469 int fb_find_mode(struct fb_var_screeninfo *var,
470 struct fb_info *info, const char *mode_option,
471 const struct fb_videomode *db, unsigned int dbsize,
472 const struct fb_videomode *default_mode,
473 unsigned int default_bpp)
477 /* Set up defaults */
480 dbsize = sizeof(modedb)/sizeof(*modedb);
483 default_mode = &modedb[DEFAULT_MODEDB_INDEX];
487 /* Did the user specify a video mode? */
488 if (mode_option || (mode_option = global_mode_option)) {
489 const char *name = mode_option;
490 unsigned int namelen = strlen(name);
491 int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
492 unsigned int xres = 0, yres = 0, bpp = default_bpp, refresh = 0;
493 int yres_specified = 0;
495 for (i = namelen-1; i >= 0; i--) {
499 if (!refresh_specified && !bpp_specified &&
501 refresh = my_atoi(&name[i+1]);
502 refresh_specified = 1;
508 if (!bpp_specified && !yres_specified) {
509 bpp = my_atoi(&name[i+1]);
515 if (!yres_specified) {
516 yres = my_atoi(&name[i+1]);
527 if (i < 0 && yres_specified) {
528 xres = my_atoi(name);
532 for (i = refresh_specified; i >= 0; i--) {
533 DPRINTK("Trying specified video mode%s\n",
534 i ? "" : " (ignoring refresh rate)");
535 for (j = 0; j < dbsize; j++)
536 if ((name_matches(db[j], name, namelen) ||
537 (res_specified && res_matches(db[j], xres, yres))) &&
538 (!i || db[j].refresh == refresh) &&
539 __fb_try_mode(var, info, &db[j], bpp))
544 DPRINTK("Trying default video mode\n");
545 if (__fb_try_mode(var, info, default_mode, default_bpp))
548 DPRINTK("Trying all modes\n");
549 for (i = 0; i < dbsize; i++)
550 if (__fb_try_mode(var, info, &db[i], default_bpp))
553 DPRINTK("No valid mode found\n");
557 EXPORT_SYMBOL(vesa_modes);
558 EXPORT_SYMBOL(fb_find_mode);