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1/*
2 * linux/drivers/video/modedb.c -- Standard video mode database management
3 *
4 * Copyright (C) 1999 Geert Uytterhoeven
5 *
6 * 2001 - Documented with DocBook
7 * - Brad Douglas <brad@neruo.com>
8 *
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
11 * more details.
12 */
13
14#include <linux/module.h>
15#include <linux/slab.h>
16#include <linux/fb.h>
17#include <linux/kernel.h>
18
19#undef DEBUG
20
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))
25
26#ifdef DEBUG
27#define DPRINTK(fmt, args...) printk("modedb %s: " fmt, __func__ , ## args)
28#else
29#define DPRINTK(fmt, args...)
30#endif
31
32const char *fb_mode_option;
33EXPORT_SYMBOL_GPL(fb_mode_option);
34
35/*
36 * Standard video mode definitions (taken from XFree86)
37 */
38
39static const struct fb_videomode modedb[] = {
40
41 /* 640x400 @ 70 Hz, 31.5 kHz hsync */
42 { NULL, 70, 640, 400, 39721, 40, 24, 39, 9, 96, 2, 0,
43 FB_VMODE_NONINTERLACED },
44
45 /* 640x480 @ 60 Hz, 31.5 kHz hsync */
46 { NULL, 60, 640, 480, 39721, 40, 24, 32, 11, 96, 2, 0,
47 FB_VMODE_NONINTERLACED },
48
49 /* 800x600 @ 56 Hz, 35.15 kHz hsync */
50 { NULL, 56, 800, 600, 27777, 128, 24, 22, 1, 72, 2, 0,
51 FB_VMODE_NONINTERLACED },
52
53 /* 1024x768 @ 87 Hz interlaced, 35.5 kHz hsync */
54 { NULL, 87, 1024, 768, 22271, 56, 24, 33, 8, 160, 8, 0,
55 FB_VMODE_INTERLACED },
56
57 /* 640x400 @ 85 Hz, 37.86 kHz hsync */
58 { NULL, 85, 640, 400, 31746, 96, 32, 41, 1, 64, 3,
59 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED },
60
61 /* 640x480 @ 72 Hz, 36.5 kHz hsync */
62 { NULL, 72, 640, 480, 31746, 144, 40, 30, 8, 40, 3, 0,
63 FB_VMODE_NONINTERLACED },
64
65 /* 640x480 @ 75 Hz, 37.50 kHz hsync */
66 { NULL, 75, 640, 480, 31746, 120, 16, 16, 1, 64, 3, 0,
67 FB_VMODE_NONINTERLACED },
68
69 /* 800x600 @ 60 Hz, 37.8 kHz hsync */
70 { NULL, 60, 800, 600, 25000, 88, 40, 23, 1, 128, 4,
71 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
72 FB_VMODE_NONINTERLACED },
73
74 /* 640x480 @ 85 Hz, 43.27 kHz hsync */
75 { NULL, 85, 640, 480, 27777, 80, 56, 25, 1, 56, 3, 0,
76 FB_VMODE_NONINTERLACED },
77
78 /* 1152x864 @ 89 Hz interlaced, 44 kHz hsync */
79 { NULL, 89, 1152, 864, 15384, 96, 16, 110, 1, 216, 10, 0,
80 FB_VMODE_INTERLACED },
81 /* 800x600 @ 72 Hz, 48.0 kHz hsync */
82 { NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
83 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
84 FB_VMODE_NONINTERLACED },
85
86 /* 1024x768 @ 60 Hz, 48.4 kHz hsync */
87 { NULL, 60, 1024, 768, 15384, 168, 8, 29, 3, 144, 6, 0,
88 FB_VMODE_NONINTERLACED },
89
90 /* 640x480 @ 100 Hz, 53.01 kHz hsync */
91 { NULL, 100, 640, 480, 21834, 96, 32, 36, 8, 96, 6, 0,
92 FB_VMODE_NONINTERLACED },
93
94 /* 1152x864 @ 60 Hz, 53.5 kHz hsync */
95 { NULL, 60, 1152, 864, 11123, 208, 64, 16, 4, 256, 8, 0,
96 FB_VMODE_NONINTERLACED },
97
98 /* 800x600 @ 85 Hz, 55.84 kHz hsync */
99 { NULL, 85, 800, 600, 16460, 160, 64, 36, 16, 64, 5, 0,
100 FB_VMODE_NONINTERLACED },
101
102 /* 1024x768 @ 70 Hz, 56.5 kHz hsync */
103 { NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6, 0,
104 FB_VMODE_NONINTERLACED },
105
106 /* 1280x1024 @ 87 Hz interlaced, 51 kHz hsync */
107 { NULL, 87, 1280, 1024, 12500, 56, 16, 128, 1, 216, 12, 0,
108 FB_VMODE_INTERLACED },
109
110 /* 800x600 @ 100 Hz, 64.02 kHz hsync */
111 { NULL, 100, 800, 600, 14357, 160, 64, 30, 4, 64, 6, 0,
112 FB_VMODE_NONINTERLACED },
113
114 /* 1024x768 @ 76 Hz, 62.5 kHz hsync */
115 { NULL, 76, 1024, 768, 11764, 208, 8, 36, 16, 120, 3, 0,
116 FB_VMODE_NONINTERLACED },
117
118 /* 1152x864 @ 70 Hz, 62.4 kHz hsync */
119 { NULL, 70, 1152, 864, 10869, 106, 56, 20, 1, 160, 10, 0,
120 FB_VMODE_NONINTERLACED },
121
122 /* 1280x1024 @ 61 Hz, 64.2 kHz hsync */
123 { NULL, 61, 1280, 1024, 9090, 200, 48, 26, 1, 184, 3, 0,
124 FB_VMODE_NONINTERLACED },
125
126 /* 1400x1050 @ 60Hz, 63.9 kHz hsync */
127 { NULL, 60, 1400, 1050, 9259, 136, 40, 13, 1, 112, 3, 0,
128 FB_VMODE_NONINTERLACED },
129
130 /* 1400x1050 @ 75,107 Hz, 82,392 kHz +hsync +vsync*/
131 { NULL, 75, 1400, 1050, 7190, 120, 56, 23, 10, 112, 13,
132 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
133 FB_VMODE_NONINTERLACED },
134
135 /* 1400x1050 @ 60 Hz, ? kHz +hsync +vsync*/
136 { NULL, 60, 1400, 1050, 9259, 128, 40, 12, 0, 112, 3,
137 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
138 FB_VMODE_NONINTERLACED },
139
140 /* 1024x768 @ 85 Hz, 70.24 kHz hsync */
141 { NULL, 85, 1024, 768, 10111, 192, 32, 34, 14, 160, 6, 0,
142 FB_VMODE_NONINTERLACED },
143
144 /* 1152x864 @ 78 Hz, 70.8 kHz hsync */
145 { NULL, 78, 1152, 864, 9090, 228, 88, 32, 0, 84, 12, 0,
146 FB_VMODE_NONINTERLACED },
147
148 /* 1280x1024 @ 70 Hz, 74.59 kHz hsync */
149 { NULL, 70, 1280, 1024, 7905, 224, 32, 28, 8, 160, 8, 0,
150 FB_VMODE_NONINTERLACED },
151
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,
155 FB_VMODE_NONINTERLACED },
156
157 /* 1152x864 @ 84 Hz, 76.0 kHz hsync */
158 { NULL, 84, 1152, 864, 7407, 184, 312, 32, 0, 128, 12, 0,
159 FB_VMODE_NONINTERLACED },
160
161 /* 1280x1024 @ 74 Hz, 78.85 kHz hsync */
162 { NULL, 74, 1280, 1024, 7407, 256, 32, 34, 3, 144, 3, 0,
163 FB_VMODE_NONINTERLACED },
164
165 /* 1024x768 @ 100Hz, 80.21 kHz hsync */
166 { NULL, 100, 1024, 768, 8658, 192, 32, 21, 3, 192, 10, 0,
167 FB_VMODE_NONINTERLACED },
168
169 /* 1280x1024 @ 76 Hz, 81.13 kHz hsync */
170 { NULL, 76, 1280, 1024, 7407, 248, 32, 34, 3, 104, 3, 0,
171 FB_VMODE_NONINTERLACED },
172
173 /* 1600x1200 @ 70 Hz, 87.50 kHz hsync */
174 { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3, 0,
175 FB_VMODE_NONINTERLACED },
176
177 /* 1152x864 @ 100 Hz, 89.62 kHz hsync */
178 { NULL, 100, 1152, 864, 7264, 224, 32, 17, 2, 128, 19, 0,
179 FB_VMODE_NONINTERLACED },
180
181 /* 1280x1024 @ 85 Hz, 91.15 kHz hsync */
182 { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
183 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
184 FB_VMODE_NONINTERLACED },
185
186 /* 1600x1200 @ 75 Hz, 93.75 kHz hsync */
187 { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
188 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
189 FB_VMODE_NONINTERLACED },
190
191 /* 1680x1050 @ 60 Hz, 65.191 kHz hsync */
192 { NULL, 60, 1680, 1050, 6848, 280, 104, 30, 3, 176, 6,
193 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
194 FB_VMODE_NONINTERLACED },
195
196 /* 1600x1200 @ 85 Hz, 105.77 kHz hsync */
197 { NULL, 85, 1600, 1200, 4545, 272, 16, 37, 4, 192, 3,
198 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
199 FB_VMODE_NONINTERLACED },
200
201 /* 1280x1024 @ 100 Hz, 107.16 kHz hsync */
202 { NULL, 100, 1280, 1024, 5502, 256, 32, 26, 7, 128, 15, 0,
203 FB_VMODE_NONINTERLACED },
204
205 /* 1800x1440 @ 64Hz, 96.15 kHz hsync */
206 { NULL, 64, 1800, 1440, 4347, 304, 96, 46, 1, 192, 3,
207 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
208 FB_VMODE_NONINTERLACED },
209
210 /* 1800x1440 @ 70Hz, 104.52 kHz hsync */
211 { NULL, 70, 1800, 1440, 4000, 304, 96, 46, 1, 192, 3,
212 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
213 FB_VMODE_NONINTERLACED },
214
215 /* 512x384 @ 78 Hz, 31.50 kHz hsync */
216 { NULL, 78, 512, 384, 49603, 48, 16, 16, 1, 64, 3, 0,
217 FB_VMODE_NONINTERLACED },
218
219 /* 512x384 @ 85 Hz, 34.38 kHz hsync */
220 { NULL, 85, 512, 384, 45454, 48, 16, 16, 1, 64, 3, 0,
221 FB_VMODE_NONINTERLACED },
222
223 /* 320x200 @ 70 Hz, 31.5 kHz hsync, 8:5 aspect ratio */
224 { NULL, 70, 320, 200, 79440, 16, 16, 20, 4, 48, 1, 0,
225 FB_VMODE_DOUBLE },
226
227 /* 320x240 @ 60 Hz, 31.5 kHz hsync, 4:3 aspect ratio */
228 { NULL, 60, 320, 240, 79440, 16, 16, 16, 5, 48, 1, 0,
229 FB_VMODE_DOUBLE },
230
231 /* 320x240 @ 72 Hz, 36.5 kHz hsync */
232 { NULL, 72, 320, 240, 63492, 16, 16, 16, 4, 48, 2, 0,
233 FB_VMODE_DOUBLE },
234
235 /* 400x300 @ 56 Hz, 35.2 kHz hsync, 4:3 aspect ratio */
236 { NULL, 56, 400, 300, 55555, 64, 16, 10, 1, 32, 1, 0,
237 FB_VMODE_DOUBLE },
238
239 /* 400x300 @ 60 Hz, 37.8 kHz hsync */
240 { NULL, 60, 400, 300, 50000, 48, 16, 11, 1, 64, 2, 0,
241 FB_VMODE_DOUBLE },
242
243 /* 400x300 @ 72 Hz, 48.0 kHz hsync */
244 { NULL, 72, 400, 300, 40000, 32, 24, 11, 19, 64, 3, 0,
245 FB_VMODE_DOUBLE },
246
247 /* 480x300 @ 56 Hz, 35.2 kHz hsync, 8:5 aspect ratio */
248 { NULL, 56, 480, 300, 46176, 80, 16, 10, 1, 40, 1, 0,
249 FB_VMODE_DOUBLE },
250
251 /* 480x300 @ 60 Hz, 37.8 kHz hsync */
252 { NULL, 60, 480, 300, 41858, 56, 16, 11, 1, 80, 2, 0,
253 FB_VMODE_DOUBLE },
254
255 /* 480x300 @ 63 Hz, 39.6 kHz hsync */
256 { NULL, 63, 480, 300, 40000, 56, 16, 11, 1, 80, 2, 0,
257 FB_VMODE_DOUBLE },
258
259 /* 480x300 @ 72 Hz, 48.0 kHz hsync */
260 { NULL, 72, 480, 300, 33386, 40, 24, 11, 19, 80, 3, 0,
261 FB_VMODE_DOUBLE },
262
263 /* 1920x1200 @ 60 Hz, 74.5 Khz hsync */
264 { NULL, 60, 1920, 1200, 5177, 128, 336, 1, 38, 208, 3,
265 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
266 FB_VMODE_NONINTERLACED },
267
268 /* 1152x768, 60 Hz, PowerBook G4 Titanium I and II */
269 { NULL, 60, 1152, 768, 14047, 158, 26, 29, 3, 136, 6,
270 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
271 FB_VMODE_NONINTERLACED },
272
273 /* 1366x768, 60 Hz, 47.403 kHz hsync, WXGA 16:9 aspect ratio */
274 { NULL, 60, 1366, 768, 13806, 120, 10, 14, 3, 32, 5, 0,
275 FB_VMODE_NONINTERLACED },
276
277 /* 1280x800, 60 Hz, 47.403 kHz hsync, WXGA 16:10 aspect ratio */
278 { NULL, 60, 1280, 800, 12048, 200, 64, 24, 1, 136, 3, 0,
279 FB_VMODE_NONINTERLACED },
280
281 /* 720x576i @ 50 Hz, 15.625 kHz hsync (PAL RGB) */
282 { NULL, 50, 720, 576, 74074, 64, 16, 39, 5, 64, 5, 0,
283 FB_VMODE_INTERLACED },
284
285 /* 800x520i @ 50 Hz, 15.625 kHz hsync (PAL RGB) */
286 { NULL, 50, 800, 520, 58823, 144, 64, 72, 28, 80, 5, 0,
287 FB_VMODE_INTERLACED },
288
289 /* 864x480 @ 60 Hz, 35.15 kHz hsync */
290 { NULL, 60, 864, 480, 27777, 1, 1, 1, 1, 0, 0,
291 0, FB_VMODE_NONINTERLACED },
292};
293
294#ifdef CONFIG_FB_MODE_HELPERS
295const struct fb_videomode cea_modes[64] = {
296 /* #1: 640x480p@59.94/60Hz */
297 [1] = {
298 NULL, 60, 640, 480, 39722, 48, 16, 33, 10, 96, 2, 0,
299 FB_VMODE_NONINTERLACED, 0,
300 },
301 /* #3: 720x480p@59.94/60Hz */
302 [3] = {
303 NULL, 60, 720, 480, 37037, 60, 16, 30, 9, 62, 6, 0,
304 FB_VMODE_NONINTERLACED, 0,
305 },
306 /* #5: 1920x1080i@59.94/60Hz */
307 [5] = {
308 NULL, 60, 1920, 1080, 13763, 148, 88, 15, 2, 44, 5,
309 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
310 FB_VMODE_INTERLACED, 0,
311 },
312 /* #7: 720(1440)x480iH@59.94/60Hz */
313 [7] = {
314 NULL, 60, 1440, 480, 18554/*37108*/, 114, 38, 15, 4, 124, 3, 0,
315 FB_VMODE_INTERLACED, 0,
316 },
317 /* #9: 720(1440)x240pH@59.94/60Hz */
318 [9] = {
319 NULL, 60, 1440, 240, 18554, 114, 38, 16, 4, 124, 3, 0,
320 FB_VMODE_NONINTERLACED, 0,
321 },
322 /* #18: 720x576pH@50Hz */
323 [18] = {
324 NULL, 50, 720, 576, 37037, 68, 12, 39, 5, 64, 5, 0,
325 FB_VMODE_NONINTERLACED, 0,
326 },
327 /* #19: 1280x720p@50Hz */
328 [19] = {
329 NULL, 50, 1280, 720, 13468, 220, 440, 20, 5, 40, 5,
330 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
331 FB_VMODE_NONINTERLACED, 0,
332 },
333 /* #20: 1920x1080i@50Hz */
334 [20] = {
335 NULL, 50, 1920, 1080, 13480, 148, 528, 15, 5, 528, 5,
336 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
337 FB_VMODE_INTERLACED, 0,
338 },
339 /* #32: 1920x1080p@23.98/24Hz */
340 [32] = {
341 NULL, 24, 1920, 1080, 13468, 148, 638, 36, 4, 44, 5,
342 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
343 FB_VMODE_NONINTERLACED, 0,
344 },
345 /* #35: (2880)x480p4x@59.94/60Hz */
346 [35] = {
347 NULL, 60, 2880, 480, 9250, 240, 64, 30, 9, 248, 6, 0,
348 FB_VMODE_NONINTERLACED, 0,
349 },
350};
351
352const struct fb_videomode vesa_modes[] = {
353 /* 0 640x350-85 VESA */
354 { NULL, 85, 640, 350, 31746, 96, 32, 60, 32, 64, 3,
355 FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA},
356 /* 1 640x400-85 VESA */
357 { NULL, 85, 640, 400, 31746, 96, 32, 41, 01, 64, 3,
358 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
359 /* 2 720x400-85 VESA */
360 { NULL, 85, 721, 400, 28169, 108, 36, 42, 01, 72, 3,
361 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
362 /* 3 640x480-60 VESA */
363 { NULL, 60, 640, 480, 39682, 48, 16, 33, 10, 96, 2,
364 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
365 /* 4 640x480-72 VESA */
366 { NULL, 72, 640, 480, 31746, 128, 24, 29, 9, 40, 2,
367 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
368 /* 5 640x480-75 VESA */
369 { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
370 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
371 /* 6 640x480-85 VESA */
372 { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
373 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
374 /* 7 800x600-56 VESA */
375 { NULL, 56, 800, 600, 27777, 128, 24, 22, 01, 72, 2,
376 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
377 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
378 /* 8 800x600-60 VESA */
379 { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
380 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
381 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
382 /* 9 800x600-72 VESA */
383 { NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
384 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
385 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
386 /* 10 800x600-75 VESA */
387 { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
388 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
389 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
390 /* 11 800x600-85 VESA */
391 { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
392 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
393 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
394 /* 12 1024x768i-43 VESA */
395 { NULL, 43, 1024, 768, 22271, 56, 8, 41, 0, 176, 8,
396 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
397 FB_VMODE_INTERLACED, FB_MODE_IS_VESA },
398 /* 13 1024x768-60 VESA */
399 { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
400 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
401 /* 14 1024x768-70 VESA */
402 { NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6,
403 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
404 /* 15 1024x768-75 VESA */
405 { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
406 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
407 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
408 /* 16 1024x768-85 VESA */
409 { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
410 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
411 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
412 /* 17 1152x864-75 VESA */
413 { NULL, 75, 1152, 864, 9259, 256, 64, 32, 1, 128, 3,
414 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
415 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
416 /* 18 1280x960-60 VESA */
417 { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
418 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
419 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
420 /* 19 1280x960-85 VESA */
421 { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
422 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
423 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
424 /* 20 1280x1024-60 VESA */
425 { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
426 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
427 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
428 /* 21 1280x1024-75 VESA */
429 { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
430 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
431 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
432 /* 22 1280x1024-85 VESA */
433 { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
434 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
435 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
436 /* 23 1600x1200-60 VESA */
437 { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
438 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
439 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
440 /* 24 1600x1200-65 VESA */
441 { NULL, 65, 1600, 1200, 5698, 304, 64, 46, 1, 192, 3,
442 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
443 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
444 /* 25 1600x1200-70 VESA */
445 { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
446 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
447 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
448 /* 26 1600x1200-75 VESA */
449 { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
450 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
451 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
452 /* 27 1600x1200-85 VESA */
453 { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
454 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
455 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
456 /* 28 1792x1344-60 VESA */
457 { NULL, 60, 1792, 1344, 4882, 328, 128, 46, 1, 200, 3,
458 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
459 /* 29 1792x1344-75 VESA */
460 { NULL, 75, 1792, 1344, 3831, 352, 96, 69, 1, 216, 3,
461 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
462 /* 30 1856x1392-60 VESA */
463 { NULL, 60, 1856, 1392, 4580, 352, 96, 43, 1, 224, 3,
464 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
465 /* 31 1856x1392-75 VESA */
466 { NULL, 75, 1856, 1392, 3472, 352, 128, 104, 1, 224, 3,
467 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
468 /* 32 1920x1440-60 VESA */
469 { NULL, 60, 1920, 1440, 4273, 344, 128, 56, 1, 200, 3,
470 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
471 /* 33 1920x1440-75 VESA */
472 { NULL, 75, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3,
473 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
474};
475EXPORT_SYMBOL(vesa_modes);
476#endif /* CONFIG_FB_MODE_HELPERS */
477
478/**
479 * fb_try_mode - test a video mode
480 * @var: frame buffer user defined part of display
481 * @info: frame buffer info structure
482 * @mode: frame buffer video mode structure
483 * @bpp: color depth in bits per pixel
484 *
485 * Tries a video mode to test it's validity for device @info.
486 *
487 * Returns 1 on success.
488 *
489 */
490
491static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
492 const struct fb_videomode *mode, unsigned int bpp)
493{
494 int err = 0;
495
496 DPRINTK("Trying mode %s %dx%d-%d@%d\n", mode->name ? mode->name : "noname",
497 mode->xres, mode->yres, bpp, mode->refresh);
498 var->xres = mode->xres;
499 var->yres = mode->yres;
500 var->xres_virtual = mode->xres;
501 var->yres_virtual = mode->yres;
502 var->xoffset = 0;
503 var->yoffset = 0;
504 var->bits_per_pixel = bpp;
505 var->activate |= FB_ACTIVATE_TEST;
506 var->pixclock = mode->pixclock;
507 var->left_margin = mode->left_margin;
508 var->right_margin = mode->right_margin;
509 var->upper_margin = mode->upper_margin;
510 var->lower_margin = mode->lower_margin;
511 var->hsync_len = mode->hsync_len;
512 var->vsync_len = mode->vsync_len;
513 var->sync = mode->sync;
514 var->vmode = mode->vmode;
515 if (info->fbops->fb_check_var)
516 err = info->fbops->fb_check_var(var, info);
517 var->activate &= ~FB_ACTIVATE_TEST;
518 return err;
519}
520
521/**
522 * fb_find_mode - finds a valid video mode
523 * @var: frame buffer user defined part of display
524 * @info: frame buffer info structure
525 * @mode_option: string video mode to find
526 * @db: video mode database
527 * @dbsize: size of @db
528 * @default_mode: default video mode to fall back to
529 * @default_bpp: default color depth in bits per pixel
530 *
531 * Finds a suitable video mode, starting with the specified mode
532 * in @mode_option with fallback to @default_mode. If
533 * @default_mode fails, all modes in the video mode database will
534 * be tried.
535 *
536 * Valid mode specifiers for @mode_option:
537 *
538 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m] or
539 * <name>[-<bpp>][@<refresh>]
540 *
541 * with <xres>, <yres>, <bpp> and <refresh> decimal numbers and
542 * <name> a string.
543 *
544 * If 'M' is present after yres (and before refresh/bpp if present),
545 * the function will compute the timings using VESA(tm) Coordinated
546 * Video Timings (CVT). If 'R' is present after 'M', will compute with
547 * reduced blanking (for flatpanels). If 'i' is present, compute
548 * interlaced mode. If 'm' is present, add margins equal to 1.8%
549 * of xres rounded down to 8 pixels, and 1.8% of yres. The char
550 * 'i' and 'm' must be after 'M' and 'R'. Example:
551 *
552 * 1024x768MR-8@60m - Reduced blank with margins at 60Hz.
553 *
554 * NOTE: The passed struct @var is _not_ cleared! This allows you
555 * to supply values for e.g. the grayscale and accel_flags fields.
556 *
557 * Returns zero for failure, 1 if using specified @mode_option,
558 * 2 if using specified @mode_option with an ignored refresh rate,
559 * 3 if default mode is used, 4 if fall back to any valid mode.
560 *
561 */
562
563int fb_find_mode(struct fb_var_screeninfo *var,
564 struct fb_info *info, const char *mode_option,
565 const struct fb_videomode *db, unsigned int dbsize,
566 const struct fb_videomode *default_mode,
567 unsigned int default_bpp)
568{
569 int i;
570
571 /* Set up defaults */
572 if (!db) {
573 db = modedb;
574 dbsize = ARRAY_SIZE(modedb);
575 }
576
577 if (!default_mode)
578 default_mode = &db[0];
579
580 if (!default_bpp)
581 default_bpp = 8;
582
583 /* Did the user specify a video mode? */
584 if (!mode_option)
585 mode_option = fb_mode_option;
586 if (mode_option) {
587 const char *name = mode_option;
588 unsigned int namelen = strlen(name);
589 int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
590 unsigned int xres = 0, yres = 0, bpp = default_bpp, refresh = 0;
591 int yres_specified = 0, cvt = 0, rb = 0, interlace = 0, margins = 0;
592 u32 best, diff, tdiff;
593
594 for (i = namelen-1; i >= 0; i--) {
595 switch (name[i]) {
596 case '@':
597 namelen = i;
598 if (!refresh_specified && !bpp_specified &&
599 !yres_specified) {
600 refresh = simple_strtol(&name[i+1], NULL, 10);
601 refresh_specified = 1;
602 if (cvt || rb)
603 cvt = 0;
604 } else
605 goto done;
606 break;
607 case '-':
608 namelen = i;
609 if (!bpp_specified && !yres_specified) {
610 bpp = simple_strtol(&name[i+1], NULL, 10);
611 bpp_specified = 1;
612 if (cvt || rb)
613 cvt = 0;
614 } else
615 goto done;
616 break;
617 case 'x':
618 if (!yres_specified) {
619 yres = simple_strtol(&name[i+1], NULL, 10);
620 yres_specified = 1;
621 } else
622 goto done;
623 break;
624 case '0' ... '9':
625 break;
626 case 'M':
627 if (!yres_specified)
628 cvt = 1;
629 break;
630 case 'R':
631 if (!cvt)
632 rb = 1;
633 break;
634 case 'm':
635 if (!cvt)
636 margins = 1;
637 break;
638 case 'i':
639 if (!cvt)
640 interlace = 1;
641 break;
642 default:
643 goto done;
644 }
645 }
646 if (i < 0 && yres_specified) {
647 xres = simple_strtol(name, NULL, 10);
648 res_specified = 1;
649 }
650done:
651 if (cvt) {
652 struct fb_videomode cvt_mode;
653 int ret;
654
655 DPRINTK("CVT mode %dx%d@%dHz%s%s%s\n", xres, yres,
656 (refresh) ? refresh : 60, (rb) ? " reduced blanking" :
657 "", (margins) ? " with margins" : "", (interlace) ?
658 " interlaced" : "");
659
660 memset(&cvt_mode, 0, sizeof(cvt_mode));
661 cvt_mode.xres = xres;
662 cvt_mode.yres = yres;
663 cvt_mode.refresh = (refresh) ? refresh : 60;
664
665 if (interlace)
666 cvt_mode.vmode |= FB_VMODE_INTERLACED;
667 else
668 cvt_mode.vmode &= ~FB_VMODE_INTERLACED;
669
670 ret = fb_find_mode_cvt(&cvt_mode, margins, rb);
671
672 if (!ret && !fb_try_mode(var, info, &cvt_mode, bpp)) {
673 DPRINTK("modedb CVT: CVT mode ok\n");
674 return 1;
675 }
676
677 DPRINTK("CVT mode invalid, getting mode from database\n");
678 }
679
680 DPRINTK("Trying specified video mode%s %ix%i\n",
681 refresh_specified ? "" : " (ignoring refresh rate)", xres, yres);
682
683 if (!refresh_specified) {
684 /*
685 * If the caller has provided a custom mode database and a
686 * valid monspecs structure, we look for the mode with the
687 * highest refresh rate. Otherwise we play it safe it and
688 * try to find a mode with a refresh rate closest to the
689 * standard 60 Hz.
690 */
691 if (db != modedb &&
692 info->monspecs.vfmin && info->monspecs.vfmax &&
693 info->monspecs.hfmin && info->monspecs.hfmax &&
694 info->monspecs.dclkmax) {
695 refresh = 1000;
696 } else {
697 refresh = 60;
698 }
699 }
700
701 diff = -1;
702 best = -1;
703 for (i = 0; i < dbsize; i++) {
704 if ((name_matches(db[i], name, namelen) ||
705 (res_specified && res_matches(db[i], xres, yres))) &&
706 !fb_try_mode(var, info, &db[i], bpp)) {
707 if (refresh_specified && db[i].refresh == refresh) {
708 return 1;
709 } else {
710 if (abs(db[i].refresh - refresh) < diff) {
711 diff = abs(db[i].refresh - refresh);
712 best = i;
713 }
714 }
715 }
716 }
717 if (best != -1) {
718 fb_try_mode(var, info, &db[best], bpp);
719 return (refresh_specified) ? 2 : 1;
720 }
721
722 diff = 2 * (xres + yres);
723 best = -1;
724 DPRINTK("Trying best-fit modes\n");
725 for (i = 0; i < dbsize; i++) {
726 DPRINTK("Trying %ix%i\n", db[i].xres, db[i].yres);
727 if (!fb_try_mode(var, info, &db[i], bpp)) {
728 tdiff = abs(db[i].xres - xres) +
729 abs(db[i].yres - yres);
730
731 /*
732 * Penalize modes with resolutions smaller
733 * than requested.
734 */
735 if (xres > db[i].xres || yres > db[i].yres)
736 tdiff += xres + yres;
737
738 if (diff > tdiff) {
739 diff = tdiff;
740 best = i;
741 }
742 }
743 }
744 if (best != -1) {
745 fb_try_mode(var, info, &db[best], bpp);
746 return 5;
747 }
748 }
749
750 DPRINTK("Trying default video mode\n");
751 if (!fb_try_mode(var, info, default_mode, default_bpp))
752 return 3;
753
754 DPRINTK("Trying all modes\n");
755 for (i = 0; i < dbsize; i++)
756 if (!fb_try_mode(var, info, &db[i], default_bpp))
757 return 4;
758
759 DPRINTK("No valid mode found\n");
760 return 0;
761}
762
763/**
764 * fb_var_to_videomode - convert fb_var_screeninfo to fb_videomode
765 * @mode: pointer to struct fb_videomode
766 * @var: pointer to struct fb_var_screeninfo
767 */
768void fb_var_to_videomode(struct fb_videomode *mode,
769 const struct fb_var_screeninfo *var)
770{
771 u32 pixclock, hfreq, htotal, vtotal;
772
773 mode->name = NULL;
774 mode->xres = var->xres;
775 mode->yres = var->yres;
776 mode->pixclock = var->pixclock;
777 mode->hsync_len = var->hsync_len;
778 mode->vsync_len = var->vsync_len;
779 mode->left_margin = var->left_margin;
780 mode->right_margin = var->right_margin;
781 mode->upper_margin = var->upper_margin;
782 mode->lower_margin = var->lower_margin;
783 mode->sync = var->sync;
784 mode->vmode = var->vmode & FB_VMODE_MASK;
785 mode->flag = FB_MODE_IS_FROM_VAR;
786 mode->refresh = 0;
787
788 if (!var->pixclock)
789 return;
790
791 pixclock = PICOS2KHZ(var->pixclock) * 1000;
792
793 htotal = var->xres + var->right_margin + var->hsync_len +
794 var->left_margin;
795 vtotal = var->yres + var->lower_margin + var->vsync_len +
796 var->upper_margin;
797
798 if (var->vmode & FB_VMODE_INTERLACED)
799 vtotal /= 2;
800 if (var->vmode & FB_VMODE_DOUBLE)
801 vtotal *= 2;
802
803 hfreq = pixclock/htotal;
804 mode->refresh = hfreq/vtotal;
805}
806
807/**
808 * fb_videomode_to_var - convert fb_videomode to fb_var_screeninfo
809 * @var: pointer to struct fb_var_screeninfo
810 * @mode: pointer to struct fb_videomode
811 */
812void fb_videomode_to_var(struct fb_var_screeninfo *var,
813 const struct fb_videomode *mode)
814{
815 var->xres = mode->xres;
816 var->yres = mode->yres;
817 var->xres_virtual = mode->xres;
818 var->yres_virtual = mode->yres;
819 var->xoffset = 0;
820 var->yoffset = 0;
821 var->pixclock = mode->pixclock;
822 var->left_margin = mode->left_margin;
823 var->right_margin = mode->right_margin;
824 var->upper_margin = mode->upper_margin;
825 var->lower_margin = mode->lower_margin;
826 var->hsync_len = mode->hsync_len;
827 var->vsync_len = mode->vsync_len;
828 var->sync = mode->sync;
829 var->vmode = mode->vmode & FB_VMODE_MASK;
830}
831
832/**
833 * fb_mode_is_equal - compare 2 videomodes
834 * @mode1: first videomode
835 * @mode2: second videomode
836 *
837 * RETURNS:
838 * 1 if equal, 0 if not
839 */
840int fb_mode_is_equal(const struct fb_videomode *mode1,
841 const struct fb_videomode *mode2)
842{
843 return (mode1->xres == mode2->xres &&
844 mode1->yres == mode2->yres &&
845 mode1->pixclock == mode2->pixclock &&
846 mode1->hsync_len == mode2->hsync_len &&
847 mode1->vsync_len == mode2->vsync_len &&
848 mode1->left_margin == mode2->left_margin &&
849 mode1->right_margin == mode2->right_margin &&
850 mode1->upper_margin == mode2->upper_margin &&
851 mode1->lower_margin == mode2->lower_margin &&
852 mode1->sync == mode2->sync &&
853 mode1->vmode == mode2->vmode);
854}
855
856/**
857 * fb_find_best_mode - find best matching videomode
858 * @var: pointer to struct fb_var_screeninfo
859 * @head: pointer to struct list_head of modelist
860 *
861 * RETURNS:
862 * struct fb_videomode, NULL if none found
863 *
864 * IMPORTANT:
865 * This function assumes that all modelist entries in
866 * info->modelist are valid.
867 *
868 * NOTES:
869 * Finds best matching videomode which has an equal or greater dimension than
870 * var->xres and var->yres. If more than 1 videomode is found, will return
871 * the videomode with the highest refresh rate
872 */
873const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
874 struct list_head *head)
875{
876 struct list_head *pos;
877 struct fb_modelist *modelist;
878 struct fb_videomode *mode, *best = NULL;
879 u32 diff = -1;
880
881 list_for_each(pos, head) {
882 u32 d;
883
884 modelist = list_entry(pos, struct fb_modelist, list);
885 mode = &modelist->mode;
886
887 if (mode->xres >= var->xres && mode->yres >= var->yres) {
888 d = (mode->xres - var->xres) +
889 (mode->yres - var->yres);
890 if (diff > d) {
891 diff = d;
892 best = mode;
893 } else if (diff == d && best &&
894 mode->refresh > best->refresh)
895 best = mode;
896 }
897 }
898 return best;
899}
900
901/**
902 * fb_find_nearest_mode - find closest videomode
903 *
904 * @mode: pointer to struct fb_videomode
905 * @head: pointer to modelist
906 *
907 * Finds best matching videomode, smaller or greater in dimension.
908 * If more than 1 videomode is found, will return the videomode with
909 * the closest refresh rate.
910 */
911const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
912 struct list_head *head)
913{
914 struct list_head *pos;
915 struct fb_modelist *modelist;
916 struct fb_videomode *cmode, *best = NULL;
917 u32 diff = -1, diff_refresh = -1;
918
919 list_for_each(pos, head) {
920 u32 d;
921
922 modelist = list_entry(pos, struct fb_modelist, list);
923 cmode = &modelist->mode;
924
925 d = abs(cmode->xres - mode->xres) +
926 abs(cmode->yres - mode->yres);
927 if (diff > d) {
928 diff = d;
929 diff_refresh = abs(cmode->refresh - mode->refresh);
930 best = cmode;
931 } else if (diff == d) {
932 d = abs(cmode->refresh - mode->refresh);
933 if (diff_refresh > d) {
934 diff_refresh = d;
935 best = cmode;
936 }
937 }
938 }
939
940 return best;
941}
942
943/**
944 * fb_match_mode - find a videomode which exactly matches the timings in var
945 * @var: pointer to struct fb_var_screeninfo
946 * @head: pointer to struct list_head of modelist
947 *
948 * RETURNS:
949 * struct fb_videomode, NULL if none found
950 */
951const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
952 struct list_head *head)
953{
954 struct list_head *pos;
955 struct fb_modelist *modelist;
956 struct fb_videomode *m, mode;
957
958 fb_var_to_videomode(&mode, var);
959 list_for_each(pos, head) {
960 modelist = list_entry(pos, struct fb_modelist, list);
961 m = &modelist->mode;
962 if (fb_mode_is_equal(m, &mode))
963 return m;
964 }
965 return NULL;
966}
967
968/**
969 * fb_add_videomode - adds videomode entry to modelist
970 * @mode: videomode to add
971 * @head: struct list_head of modelist
972 *
973 * NOTES:
974 * Will only add unmatched mode entries
975 */
976int fb_add_videomode(const struct fb_videomode *mode, struct list_head *head)
977{
978 struct list_head *pos;
979 struct fb_modelist *modelist;
980 struct fb_videomode *m;
981 int found = 0;
982
983 list_for_each(pos, head) {
984 modelist = list_entry(pos, struct fb_modelist, list);
985 m = &modelist->mode;
986 if (fb_mode_is_equal(m, mode)) {
987 found = 1;
988 break;
989 }
990 }
991 if (!found) {
992 modelist = kmalloc(sizeof(struct fb_modelist),
993 GFP_KERNEL);
994
995 if (!modelist)
996 return -ENOMEM;
997 modelist->mode = *mode;
998 list_add(&modelist->list, head);
999 }
1000 return 0;
1001}
1002
1003/**
1004 * fb_delete_videomode - removed videomode entry from modelist
1005 * @mode: videomode to remove
1006 * @head: struct list_head of modelist
1007 *
1008 * NOTES:
1009 * Will remove all matching mode entries
1010 */
1011void fb_delete_videomode(const struct fb_videomode *mode,
1012 struct list_head *head)
1013{
1014 struct list_head *pos, *n;
1015 struct fb_modelist *modelist;
1016 struct fb_videomode *m;
1017
1018 list_for_each_safe(pos, n, head) {
1019 modelist = list_entry(pos, struct fb_modelist, list);
1020 m = &modelist->mode;
1021 if (fb_mode_is_equal(m, mode)) {
1022 list_del(pos);
1023 kfree(pos);
1024 }
1025 }
1026}
1027
1028/**
1029 * fb_destroy_modelist - destroy modelist
1030 * @head: struct list_head of modelist
1031 */
1032void fb_destroy_modelist(struct list_head *head)
1033{
1034 struct list_head *pos, *n;
1035
1036 list_for_each_safe(pos, n, head) {
1037 list_del(pos);
1038 kfree(pos);
1039 }
1040}
1041EXPORT_SYMBOL_GPL(fb_destroy_modelist);
1042
1043/**
1044 * fb_videomode_to_modelist - convert mode array to mode list
1045 * @modedb: array of struct fb_videomode
1046 * @num: number of entries in array
1047 * @head: struct list_head of modelist
1048 */
1049void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
1050 struct list_head *head)
1051{
1052 int i;
1053
1054 INIT_LIST_HEAD(head);
1055
1056 for (i = 0; i < num; i++) {
1057 if (fb_add_videomode(&modedb[i], head))
1058 return;
1059 }
1060}
1061
1062const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
1063 struct list_head *head)
1064{
1065 struct list_head *pos;
1066 struct fb_modelist *modelist;
1067 const struct fb_videomode *m, *m1 = NULL, *md = NULL, *best = NULL;
1068 int first = 0;
1069
1070 if (!head->prev || !head->next || list_empty(head))
1071 goto finished;
1072
1073 /* get the first detailed mode and the very first mode */
1074 list_for_each(pos, head) {
1075 modelist = list_entry(pos, struct fb_modelist, list);
1076 m = &modelist->mode;
1077
1078 if (!first) {
1079 m1 = m;
1080 first = 1;
1081 }
1082
1083 if (m->flag & FB_MODE_IS_FIRST) {
1084 md = m;
1085 break;
1086 }
1087 }
1088
1089 /* first detailed timing is preferred */
1090 if (specs->misc & FB_MISC_1ST_DETAIL) {
1091 best = md;
1092 goto finished;
1093 }
1094
1095 /* find best mode based on display width and height */
1096 if (specs->max_x && specs->max_y) {
1097 struct fb_var_screeninfo var;
1098
1099 memset(&var, 0, sizeof(struct fb_var_screeninfo));
1100 var.xres = (specs->max_x * 7200)/254;
1101 var.yres = (specs->max_y * 7200)/254;
1102 m = fb_find_best_mode(&var, head);
1103 if (m) {
1104 best = m;
1105 goto finished;
1106 }
1107 }
1108
1109 /* use first detailed mode */
1110 if (md) {
1111 best = md;
1112 goto finished;
1113 }
1114
1115 /* last resort, use the very first mode */
1116 best = m1;
1117finished:
1118 return best;
1119}
1120EXPORT_SYMBOL(fb_find_best_display);
1121
1122EXPORT_SYMBOL(fb_videomode_to_var);
1123EXPORT_SYMBOL(fb_var_to_videomode);
1124EXPORT_SYMBOL(fb_mode_is_equal);
1125EXPORT_SYMBOL(fb_add_videomode);
1126EXPORT_SYMBOL(fb_match_mode);
1127EXPORT_SYMBOL(fb_find_best_mode);
1128EXPORT_SYMBOL(fb_find_nearest_mode);
1129EXPORT_SYMBOL(fb_videomode_to_modelist);
1130EXPORT_SYMBOL(fb_find_mode);
1131EXPORT_SYMBOL(fb_find_mode_cvt);