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Merge branch 'driver-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / drivers / video / modedb.c
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
32 const char *fb_mode_option;
33 EXPORT_SYMBOL_GPL(fb_mode_option);
34
35 /*
36 * Standard video mode definitions (taken from XFree86)
37 */
38
39 static 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,
43 0, FB_VMODE_NONINTERLACED
44 }, {
45 /* 640x480 @ 60 Hz, 31.5 kHz hsync */
46 NULL, 60, 640, 480, 39721, 40, 24, 32, 11, 96, 2,
47 0, FB_VMODE_NONINTERLACED
48 }, {
49 /* 800x600 @ 56 Hz, 35.15 kHz hsync */
50 NULL, 56, 800, 600, 27777, 128, 24, 22, 1, 72, 2,
51 0, 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,
55 0, 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,
63 0, FB_VMODE_NONINTERLACED
64 }, {
65 /* 640x480 @ 75 Hz, 37.50 kHz hsync */
66 NULL, 75, 640, 480, 31746, 120, 16, 16, 1, 64, 3,
67 0, 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, FB_VMODE_NONINTERLACED
72 }, {
73 /* 640x480 @ 85 Hz, 43.27 kHz hsync */
74 NULL, 85, 640, 480, 27777, 80, 56, 25, 1, 56, 3,
75 0, FB_VMODE_NONINTERLACED
76 }, {
77 /* 1152x864 @ 89 Hz interlaced, 44 kHz hsync */
78 NULL, 89, 1152, 864, 15384, 96, 16, 110, 1, 216, 10,
79 0, FB_VMODE_INTERLACED
80 }, {
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, FB_VMODE_NONINTERLACED
84 }, {
85 /* 1024x768 @ 60 Hz, 48.4 kHz hsync */
86 NULL, 60, 1024, 768, 15384, 168, 8, 29, 3, 144, 6,
87 0, FB_VMODE_NONINTERLACED
88 }, {
89 /* 640x480 @ 100 Hz, 53.01 kHz hsync */
90 NULL, 100, 640, 480, 21834, 96, 32, 36, 8, 96, 6,
91 0, FB_VMODE_NONINTERLACED
92 }, {
93 /* 1152x864 @ 60 Hz, 53.5 kHz hsync */
94 NULL, 60, 1152, 864, 11123, 208, 64, 16, 4, 256, 8,
95 0, FB_VMODE_NONINTERLACED
96 }, {
97 /* 800x600 @ 85 Hz, 55.84 kHz hsync */
98 NULL, 85, 800, 600, 16460, 160, 64, 36, 16, 64, 5,
99 0, FB_VMODE_NONINTERLACED
100 }, {
101 /* 1024x768 @ 70 Hz, 56.5 kHz hsync */
102 NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6,
103 0, FB_VMODE_NONINTERLACED
104 }, {
105 /* 1280x1024 @ 87 Hz interlaced, 51 kHz hsync */
106 NULL, 87, 1280, 1024, 12500, 56, 16, 128, 1, 216, 12,
107 0, FB_VMODE_INTERLACED
108 }, {
109 /* 800x600 @ 100 Hz, 64.02 kHz hsync */
110 NULL, 100, 800, 600, 14357, 160, 64, 30, 4, 64, 6,
111 0, FB_VMODE_NONINTERLACED
112 }, {
113 /* 1024x768 @ 76 Hz, 62.5 kHz hsync */
114 NULL, 76, 1024, 768, 11764, 208, 8, 36, 16, 120, 3,
115 0, FB_VMODE_NONINTERLACED
116 }, {
117 /* 1152x864 @ 70 Hz, 62.4 kHz hsync */
118 NULL, 70, 1152, 864, 10869, 106, 56, 20, 1, 160, 10,
119 0, FB_VMODE_NONINTERLACED
120 }, {
121 /* 1280x1024 @ 61 Hz, 64.2 kHz hsync */
122 NULL, 61, 1280, 1024, 9090, 200, 48, 26, 1, 184, 3,
123 0, FB_VMODE_NONINTERLACED
124 }, {
125 /* 1400x1050 @ 60Hz, 63.9 kHz hsync */
126 NULL, 60, 1400, 1050, 9259, 136, 40, 13, 1, 112, 3,
127 0, FB_VMODE_NONINTERLACED
128 }, {
129 /* 1400x1050 @ 75,107 Hz, 82,392 kHz +hsync +vsync*/
130 NULL, 75, 1400, 1050, 7190, 120, 56, 23, 10, 112, 13,
131 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
132 }, {
133 /* 1400x1050 @ 60 Hz, ? kHz +hsync +vsync*/
134 NULL, 60, 1400, 1050, 9259, 128, 40, 12, 0, 112, 3,
135 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
136 }, {
137 /* 1024x768 @ 85 Hz, 70.24 kHz hsync */
138 NULL, 85, 1024, 768, 10111, 192, 32, 34, 14, 160, 6,
139 0, FB_VMODE_NONINTERLACED
140 }, {
141 /* 1152x864 @ 78 Hz, 70.8 kHz hsync */
142 NULL, 78, 1152, 864, 9090, 228, 88, 32, 0, 84, 12,
143 0, FB_VMODE_NONINTERLACED
144 }, {
145 /* 1280x1024 @ 70 Hz, 74.59 kHz hsync */
146 NULL, 70, 1280, 1024, 7905, 224, 32, 28, 8, 160, 8,
147 0, FB_VMODE_NONINTERLACED
148 }, {
149 /* 1600x1200 @ 60Hz, 75.00 kHz hsync */
150 NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
151 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
152 }, {
153 /* 1152x864 @ 84 Hz, 76.0 kHz hsync */
154 NULL, 84, 1152, 864, 7407, 184, 312, 32, 0, 128, 12,
155 0, FB_VMODE_NONINTERLACED
156 }, {
157 /* 1280x1024 @ 74 Hz, 78.85 kHz hsync */
158 NULL, 74, 1280, 1024, 7407, 256, 32, 34, 3, 144, 3,
159 0, FB_VMODE_NONINTERLACED
160 }, {
161 /* 1024x768 @ 100Hz, 80.21 kHz hsync */
162 NULL, 100, 1024, 768, 8658, 192, 32, 21, 3, 192, 10,
163 0, FB_VMODE_NONINTERLACED
164 }, {
165 /* 1280x1024 @ 76 Hz, 81.13 kHz hsync */
166 NULL, 76, 1280, 1024, 7407, 248, 32, 34, 3, 104, 3,
167 0, FB_VMODE_NONINTERLACED
168 }, {
169 /* 1600x1200 @ 70 Hz, 87.50 kHz hsync */
170 NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
171 0, FB_VMODE_NONINTERLACED
172 }, {
173 /* 1152x864 @ 100 Hz, 89.62 kHz hsync */
174 NULL, 100, 1152, 864, 7264, 224, 32, 17, 2, 128, 19,
175 0, FB_VMODE_NONINTERLACED
176 }, {
177 /* 1280x1024 @ 85 Hz, 91.15 kHz hsync */
178 NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
179 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
180 }, {
181 /* 1600x1200 @ 75 Hz, 93.75 kHz hsync */
182 NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
183 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
184 }, {
185 /* 1680x1050 @ 60 Hz, 65.191 kHz hsync */
186 NULL, 60, 1680, 1050, 6848, 280, 104, 30, 3, 176, 6,
187 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
188 }, {
189 /* 1600x1200 @ 85 Hz, 105.77 kHz hsync */
190 NULL, 85, 1600, 1200, 4545, 272, 16, 37, 4, 192, 3,
191 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
192 }, {
193 /* 1280x1024 @ 100 Hz, 107.16 kHz hsync */
194 NULL, 100, 1280, 1024, 5502, 256, 32, 26, 7, 128, 15,
195 0, FB_VMODE_NONINTERLACED
196 }, {
197 /* 1800x1440 @ 64Hz, 96.15 kHz hsync */
198 NULL, 64, 1800, 1440, 4347, 304, 96, 46, 1, 192, 3,
199 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
200 }, {
201 /* 1800x1440 @ 70Hz, 104.52 kHz hsync */
202 NULL, 70, 1800, 1440, 4000, 304, 96, 46, 1, 192, 3,
203 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
204 }, {
205 /* 512x384 @ 78 Hz, 31.50 kHz hsync */
206 NULL, 78, 512, 384, 49603, 48, 16, 16, 1, 64, 3,
207 0, FB_VMODE_NONINTERLACED
208 }, {
209 /* 512x384 @ 85 Hz, 34.38 kHz hsync */
210 NULL, 85, 512, 384, 45454, 48, 16, 16, 1, 64, 3,
211 0, FB_VMODE_NONINTERLACED
212 }, {
213 /* 320x200 @ 70 Hz, 31.5 kHz hsync, 8:5 aspect ratio */
214 NULL, 70, 320, 200, 79440, 16, 16, 20, 4, 48, 1,
215 0, FB_VMODE_DOUBLE
216 }, {
217 /* 320x240 @ 60 Hz, 31.5 kHz hsync, 4:3 aspect ratio */
218 NULL, 60, 320, 240, 79440, 16, 16, 16, 5, 48, 1,
219 0, FB_VMODE_DOUBLE
220 }, {
221 /* 320x240 @ 72 Hz, 36.5 kHz hsync */
222 NULL, 72, 320, 240, 63492, 16, 16, 16, 4, 48, 2,
223 0, FB_VMODE_DOUBLE
224 }, {
225 /* 400x300 @ 56 Hz, 35.2 kHz hsync, 4:3 aspect ratio */
226 NULL, 56, 400, 300, 55555, 64, 16, 10, 1, 32, 1,
227 0, FB_VMODE_DOUBLE
228 }, {
229 /* 400x300 @ 60 Hz, 37.8 kHz hsync */
230 NULL, 60, 400, 300, 50000, 48, 16, 11, 1, 64, 2,
231 0, FB_VMODE_DOUBLE
232 }, {
233 /* 400x300 @ 72 Hz, 48.0 kHz hsync */
234 NULL, 72, 400, 300, 40000, 32, 24, 11, 19, 64, 3,
235 0, FB_VMODE_DOUBLE
236 }, {
237 /* 480x300 @ 56 Hz, 35.2 kHz hsync, 8:5 aspect ratio */
238 NULL, 56, 480, 300, 46176, 80, 16, 10, 1, 40, 1,
239 0, FB_VMODE_DOUBLE
240 }, {
241 /* 480x300 @ 60 Hz, 37.8 kHz hsync */
242 NULL, 60, 480, 300, 41858, 56, 16, 11, 1, 80, 2,
243 0, FB_VMODE_DOUBLE
244 }, {
245 /* 480x300 @ 63 Hz, 39.6 kHz hsync */
246 NULL, 63, 480, 300, 40000, 56, 16, 11, 1, 80, 2,
247 0, FB_VMODE_DOUBLE
248 }, {
249 /* 480x300 @ 72 Hz, 48.0 kHz hsync */
250 NULL, 72, 480, 300, 33386, 40, 24, 11, 19, 80, 3,
251 0, FB_VMODE_DOUBLE
252 }, {
253 /* 1920x1200 @ 60 Hz, 74.5 Khz hsync */
254 NULL, 60, 1920, 1200, 5177, 128, 336, 1, 38, 208, 3,
255 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
256 FB_VMODE_NONINTERLACED
257 }, {
258 /* 1152x768, 60 Hz, PowerBook G4 Titanium I and II */
259 NULL, 60, 1152, 768, 14047, 158, 26, 29, 3, 136, 6,
260 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
261 }, {
262 /* 1366x768, 60 Hz, 47.403 kHz hsync, WXGA 16:9 aspect ratio */
263 NULL, 60, 1366, 768, 13806, 120, 10, 14, 3, 32, 5,
264 0, FB_VMODE_NONINTERLACED
265 }, {
266 /* 1280x800, 60 Hz, 47.403 kHz hsync, WXGA 16:10 aspect ratio */
267 NULL, 60, 1280, 800, 12048, 200, 64, 24, 1, 136, 3,
268 0, FB_VMODE_NONINTERLACED
269 }, {
270 /* 720x576i @ 50 Hz, 15.625 kHz hsync (PAL RGB) */
271 NULL, 50, 720, 576, 74074, 64, 16, 39, 5, 64, 5,
272 0, FB_VMODE_INTERLACED
273 }, {
274 /* 800x520i @ 50 Hz, 15.625 kHz hsync (PAL RGB) */
275 NULL, 50, 800, 520, 58823, 144, 64, 72, 28, 80, 5,
276 0, FB_VMODE_INTERLACED
277 }, {
278 /* 864x480 @ 60 Hz, 35.15 kHz hsync */
279 NULL, 60, 864, 480, 27777, 1, 1, 1, 1, 0, 0,
280 0, FB_VMODE_NONINTERLACED
281 },
282 };
283
284 #ifdef CONFIG_FB_MODE_HELPERS
285 const struct fb_videomode cea_modes[64] = {
286 /* #1: 640x480p@59.94/60Hz */
287 [1] = {
288 NULL, 60, 640, 480, 39722, 48, 16, 33, 10, 96, 2, 0, FB_VMODE_NONINTERLACED, 0,
289 },
290 /* #3: 720x480p@59.94/60Hz */
291 [3] = {
292 NULL, 60, 720, 480, 37037, 60, 16, 30, 9, 62, 6, 0, FB_VMODE_NONINTERLACED, 0,
293 },
294 /* #5: 1920x1080i@59.94/60Hz */
295 [5] = {
296 NULL, 60, 1920, 1080, 13763, 148, 88, 15, 2, 44, 5,
297 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_INTERLACED, 0,
298 },
299 /* #7: 720(1440)x480iH@59.94/60Hz */
300 [7] = {
301 NULL, 60, 1440, 480, 18554/*37108*/, 114, 38, 15, 4, 124, 3, 0, FB_VMODE_INTERLACED, 0,
302 },
303 /* #9: 720(1440)x240pH@59.94/60Hz */
304 [9] = {
305 NULL, 60, 1440, 240, 18554, 114, 38, 16, 4, 124, 3, 0, FB_VMODE_NONINTERLACED, 0,
306 },
307 /* #18: 720x576pH@50Hz */
308 [18] = {
309 NULL, 50, 720, 576, 37037, 68, 12, 39, 5, 64, 5, 0, FB_VMODE_NONINTERLACED, 0,
310 },
311 /* #19: 1280x720p@50Hz */
312 [19] = {
313 NULL, 50, 1280, 720, 13468, 220, 440, 20, 5, 40, 5,
314 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, 0,
315 },
316 /* #20: 1920x1080i@50Hz */
317 [20] = {
318 NULL, 50, 1920, 1080, 13480, 148, 528, 15, 5, 528, 5,
319 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_INTERLACED, 0,
320 },
321 /* #32: 1920x1080p@23.98/24Hz */
322 [32] = {
323 NULL, 24, 1920, 1080, 13468, 148, 638, 36, 4, 44, 5,
324 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, 0,
325 },
326 /* #35: (2880)x480p4x@59.94/60Hz */
327 [35] = {
328 NULL, 60, 2880, 480, 9250, 240, 64, 30, 9, 248, 6, 0, FB_VMODE_NONINTERLACED, 0,
329 },
330 };
331
332 const struct fb_videomode vesa_modes[] = {
333 /* 0 640x350-85 VESA */
334 { NULL, 85, 640, 350, 31746, 96, 32, 60, 32, 64, 3,
335 FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA},
336 /* 1 640x400-85 VESA */
337 { NULL, 85, 640, 400, 31746, 96, 32, 41, 01, 64, 3,
338 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
339 /* 2 720x400-85 VESA */
340 { NULL, 85, 721, 400, 28169, 108, 36, 42, 01, 72, 3,
341 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
342 /* 3 640x480-60 VESA */
343 { NULL, 60, 640, 480, 39682, 48, 16, 33, 10, 96, 2,
344 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
345 /* 4 640x480-72 VESA */
346 { NULL, 72, 640, 480, 31746, 128, 24, 29, 9, 40, 2,
347 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
348 /* 5 640x480-75 VESA */
349 { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
350 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
351 /* 6 640x480-85 VESA */
352 { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
353 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
354 /* 7 800x600-56 VESA */
355 { NULL, 56, 800, 600, 27777, 128, 24, 22, 01, 72, 2,
356 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
357 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
358 /* 8 800x600-60 VESA */
359 { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
360 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
361 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
362 /* 9 800x600-72 VESA */
363 { NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
364 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
365 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
366 /* 10 800x600-75 VESA */
367 { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
368 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
369 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
370 /* 11 800x600-85 VESA */
371 { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
372 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
373 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
374 /* 12 1024x768i-43 VESA */
375 { NULL, 43, 1024, 768, 22271, 56, 8, 41, 0, 176, 8,
376 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
377 FB_VMODE_INTERLACED, FB_MODE_IS_VESA },
378 /* 13 1024x768-60 VESA */
379 { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
380 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
381 /* 14 1024x768-70 VESA */
382 { NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6,
383 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
384 /* 15 1024x768-75 VESA */
385 { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
386 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
387 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
388 /* 16 1024x768-85 VESA */
389 { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
390 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
391 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
392 /* 17 1152x864-75 VESA */
393 { NULL, 75, 1152, 864, 9259, 256, 64, 32, 1, 128, 3,
394 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
395 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
396 /* 18 1280x960-60 VESA */
397 { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
398 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
399 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
400 /* 19 1280x960-85 VESA */
401 { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
402 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
403 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
404 /* 20 1280x1024-60 VESA */
405 { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
406 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
407 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
408 /* 21 1280x1024-75 VESA */
409 { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
410 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
411 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
412 /* 22 1280x1024-85 VESA */
413 { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
414 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
415 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
416 /* 23 1600x1200-60 VESA */
417 { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
418 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
419 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
420 /* 24 1600x1200-65 VESA */
421 { NULL, 65, 1600, 1200, 5698, 304, 64, 46, 1, 192, 3,
422 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
423 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
424 /* 25 1600x1200-70 VESA */
425 { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
426 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
427 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
428 /* 26 1600x1200-75 VESA */
429 { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
430 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
431 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
432 /* 27 1600x1200-85 VESA */
433 { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
434 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
435 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
436 /* 28 1792x1344-60 VESA */
437 { NULL, 60, 1792, 1344, 4882, 328, 128, 46, 1, 200, 3,
438 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
439 /* 29 1792x1344-75 VESA */
440 { NULL, 75, 1792, 1344, 3831, 352, 96, 69, 1, 216, 3,
441 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
442 /* 30 1856x1392-60 VESA */
443 { NULL, 60, 1856, 1392, 4580, 352, 96, 43, 1, 224, 3,
444 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
445 /* 31 1856x1392-75 VESA */
446 { NULL, 75, 1856, 1392, 3472, 352, 128, 104, 1, 224, 3,
447 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
448 /* 32 1920x1440-60 VESA */
449 { NULL, 60, 1920, 1440, 4273, 344, 128, 56, 1, 200, 3,
450 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
451 /* 33 1920x1440-75 VESA */
452 { NULL, 75, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3,
453 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
454 };
455 EXPORT_SYMBOL(vesa_modes);
456 #endif /* CONFIG_FB_MODE_HELPERS */
457
458 /**
459 * fb_try_mode - test a video mode
460 * @var: frame buffer user defined part of display
461 * @info: frame buffer info structure
462 * @mode: frame buffer video mode structure
463 * @bpp: color depth in bits per pixel
464 *
465 * Tries a video mode to test it's validity for device @info.
466 *
467 * Returns 1 on success.
468 *
469 */
470
471 static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
472 const struct fb_videomode *mode, unsigned int bpp)
473 {
474 int err = 0;
475
476 DPRINTK("Trying mode %s %dx%d-%d@%d\n", mode->name ? mode->name : "noname",
477 mode->xres, mode->yres, bpp, mode->refresh);
478 var->xres = mode->xres;
479 var->yres = mode->yres;
480 var->xres_virtual = mode->xres;
481 var->yres_virtual = mode->yres;
482 var->xoffset = 0;
483 var->yoffset = 0;
484 var->bits_per_pixel = bpp;
485 var->activate |= FB_ACTIVATE_TEST;
486 var->pixclock = mode->pixclock;
487 var->left_margin = mode->left_margin;
488 var->right_margin = mode->right_margin;
489 var->upper_margin = mode->upper_margin;
490 var->lower_margin = mode->lower_margin;
491 var->hsync_len = mode->hsync_len;
492 var->vsync_len = mode->vsync_len;
493 var->sync = mode->sync;
494 var->vmode = mode->vmode;
495 if (info->fbops->fb_check_var)
496 err = info->fbops->fb_check_var(var, info);
497 var->activate &= ~FB_ACTIVATE_TEST;
498 return err;
499 }
500
501 /**
502 * fb_find_mode - finds a valid video mode
503 * @var: frame buffer user defined part of display
504 * @info: frame buffer info structure
505 * @mode_option: string video mode to find
506 * @db: video mode database
507 * @dbsize: size of @db
508 * @default_mode: default video mode to fall back to
509 * @default_bpp: default color depth in bits per pixel
510 *
511 * Finds a suitable video mode, starting with the specified mode
512 * in @mode_option with fallback to @default_mode. If
513 * @default_mode fails, all modes in the video mode database will
514 * be tried.
515 *
516 * Valid mode specifiers for @mode_option:
517 *
518 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m] or
519 * <name>[-<bpp>][@<refresh>]
520 *
521 * with <xres>, <yres>, <bpp> and <refresh> decimal numbers and
522 * <name> a string.
523 *
524 * If 'M' is present after yres (and before refresh/bpp if present),
525 * the function will compute the timings using VESA(tm) Coordinated
526 * Video Timings (CVT). If 'R' is present after 'M', will compute with
527 * reduced blanking (for flatpanels). If 'i' is present, compute
528 * interlaced mode. If 'm' is present, add margins equal to 1.8%
529 * of xres rounded down to 8 pixels, and 1.8% of yres. The char
530 * 'i' and 'm' must be after 'M' and 'R'. Example:
531 *
532 * 1024x768MR-8@60m - Reduced blank with margins at 60Hz.
533 *
534 * NOTE: The passed struct @var is _not_ cleared! This allows you
535 * to supply values for e.g. the grayscale and accel_flags fields.
536 *
537 * Returns zero for failure, 1 if using specified @mode_option,
538 * 2 if using specified @mode_option with an ignored refresh rate,
539 * 3 if default mode is used, 4 if fall back to any valid mode.
540 *
541 */
542
543 int fb_find_mode(struct fb_var_screeninfo *var,
544 struct fb_info *info, const char *mode_option,
545 const struct fb_videomode *db, unsigned int dbsize,
546 const struct fb_videomode *default_mode,
547 unsigned int default_bpp)
548 {
549 int i;
550
551 /* Set up defaults */
552 if (!db) {
553 db = modedb;
554 dbsize = ARRAY_SIZE(modedb);
555 }
556
557 if (!default_mode)
558 default_mode = &db[0];
559
560 if (!default_bpp)
561 default_bpp = 8;
562
563 /* Did the user specify a video mode? */
564 if (!mode_option)
565 mode_option = fb_mode_option;
566 if (mode_option) {
567 const char *name = mode_option;
568 unsigned int namelen = strlen(name);
569 int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
570 unsigned int xres = 0, yres = 0, bpp = default_bpp, refresh = 0;
571 int yres_specified = 0, cvt = 0, rb = 0, interlace = 0, margins = 0;
572 u32 best, diff, tdiff;
573
574 for (i = namelen-1; i >= 0; i--) {
575 switch (name[i]) {
576 case '@':
577 namelen = i;
578 if (!refresh_specified && !bpp_specified &&
579 !yres_specified) {
580 refresh = simple_strtol(&name[i+1], NULL, 10);
581 refresh_specified = 1;
582 if (cvt || rb)
583 cvt = 0;
584 } else
585 goto done;
586 break;
587 case '-':
588 namelen = i;
589 if (!bpp_specified && !yres_specified) {
590 bpp = simple_strtol(&name[i+1], NULL, 10);
591 bpp_specified = 1;
592 if (cvt || rb)
593 cvt = 0;
594 } else
595 goto done;
596 break;
597 case 'x':
598 if (!yres_specified) {
599 yres = simple_strtol(&name[i+1], NULL, 10);
600 yres_specified = 1;
601 } else
602 goto done;
603 break;
604 case '0' ... '9':
605 break;
606 case 'M':
607 if (!yres_specified)
608 cvt = 1;
609 break;
610 case 'R':
611 if (!cvt)
612 rb = 1;
613 break;
614 case 'm':
615 if (!cvt)
616 margins = 1;
617 break;
618 case 'i':
619 if (!cvt)
620 interlace = 1;
621 break;
622 default:
623 goto done;
624 }
625 }
626 if (i < 0 && yres_specified) {
627 xres = simple_strtol(name, NULL, 10);
628 res_specified = 1;
629 }
630 done:
631 if (cvt) {
632 struct fb_videomode cvt_mode;
633 int ret;
634
635 DPRINTK("CVT mode %dx%d@%dHz%s%s%s\n", xres, yres,
636 (refresh) ? refresh : 60, (rb) ? " reduced blanking" :
637 "", (margins) ? " with margins" : "", (interlace) ?
638 " interlaced" : "");
639
640 memset(&cvt_mode, 0, sizeof(cvt_mode));
641 cvt_mode.xres = xres;
642 cvt_mode.yres = yres;
643 cvt_mode.refresh = (refresh) ? refresh : 60;
644
645 if (interlace)
646 cvt_mode.vmode |= FB_VMODE_INTERLACED;
647 else
648 cvt_mode.vmode &= ~FB_VMODE_INTERLACED;
649
650 ret = fb_find_mode_cvt(&cvt_mode, margins, rb);
651
652 if (!ret && !fb_try_mode(var, info, &cvt_mode, bpp)) {
653 DPRINTK("modedb CVT: CVT mode ok\n");
654 return 1;
655 }
656
657 DPRINTK("CVT mode invalid, getting mode from database\n");
658 }
659
660 DPRINTK("Trying specified video mode%s %ix%i\n",
661 refresh_specified ? "" : " (ignoring refresh rate)", xres, yres);
662
663 if (!refresh_specified) {
664 /*
665 * If the caller has provided a custom mode database and a
666 * valid monspecs structure, we look for the mode with the
667 * highest refresh rate. Otherwise we play it safe it and
668 * try to find a mode with a refresh rate closest to the
669 * standard 60 Hz.
670 */
671 if (db != modedb &&
672 info->monspecs.vfmin && info->monspecs.vfmax &&
673 info->monspecs.hfmin && info->monspecs.hfmax &&
674 info->monspecs.dclkmax) {
675 refresh = 1000;
676 } else {
677 refresh = 60;
678 }
679 }
680
681 diff = -1;
682 best = -1;
683 for (i = 0; i < dbsize; i++) {
684 if ((name_matches(db[i], name, namelen) ||
685 (res_specified && res_matches(db[i], xres, yres))) &&
686 !fb_try_mode(var, info, &db[i], bpp)) {
687 if (refresh_specified && db[i].refresh == refresh) {
688 return 1;
689 } else {
690 if (abs(db[i].refresh - refresh) < diff) {
691 diff = abs(db[i].refresh - refresh);
692 best = i;
693 }
694 }
695 }
696 }
697 if (best != -1) {
698 fb_try_mode(var, info, &db[best], bpp);
699 return (refresh_specified) ? 2 : 1;
700 }
701
702 diff = 2 * (xres + yres);
703 best = -1;
704 DPRINTK("Trying best-fit modes\n");
705 for (i = 0; i < dbsize; i++) {
706 DPRINTK("Trying %ix%i\n", db[i].xres, db[i].yres);
707 if (!fb_try_mode(var, info, &db[i], bpp)) {
708 tdiff = abs(db[i].xres - xres) +
709 abs(db[i].yres - yres);
710
711 /*
712 * Penalize modes with resolutions smaller
713 * than requested.
714 */
715 if (xres > db[i].xres || yres > db[i].yres)
716 tdiff += xres + yres;
717
718 if (diff > tdiff) {
719 diff = tdiff;
720 best = i;
721 }
722 }
723 }
724 if (best != -1) {
725 fb_try_mode(var, info, &db[best], bpp);
726 return 5;
727 }
728 }
729
730 DPRINTK("Trying default video mode\n");
731 if (!fb_try_mode(var, info, default_mode, default_bpp))
732 return 3;
733
734 DPRINTK("Trying all modes\n");
735 for (i = 0; i < dbsize; i++)
736 if (!fb_try_mode(var, info, &db[i], default_bpp))
737 return 4;
738
739 DPRINTK("No valid mode found\n");
740 return 0;
741 }
742
743 /**
744 * fb_var_to_videomode - convert fb_var_screeninfo to fb_videomode
745 * @mode: pointer to struct fb_videomode
746 * @var: pointer to struct fb_var_screeninfo
747 */
748 void fb_var_to_videomode(struct fb_videomode *mode,
749 const struct fb_var_screeninfo *var)
750 {
751 u32 pixclock, hfreq, htotal, vtotal;
752
753 mode->name = NULL;
754 mode->xres = var->xres;
755 mode->yres = var->yres;
756 mode->pixclock = var->pixclock;
757 mode->hsync_len = var->hsync_len;
758 mode->vsync_len = var->vsync_len;
759 mode->left_margin = var->left_margin;
760 mode->right_margin = var->right_margin;
761 mode->upper_margin = var->upper_margin;
762 mode->lower_margin = var->lower_margin;
763 mode->sync = var->sync;
764 mode->vmode = var->vmode & FB_VMODE_MASK;
765 mode->flag = FB_MODE_IS_FROM_VAR;
766 mode->refresh = 0;
767
768 if (!var->pixclock)
769 return;
770
771 pixclock = PICOS2KHZ(var->pixclock) * 1000;
772
773 htotal = var->xres + var->right_margin + var->hsync_len +
774 var->left_margin;
775 vtotal = var->yres + var->lower_margin + var->vsync_len +
776 var->upper_margin;
777
778 if (var->vmode & FB_VMODE_INTERLACED)
779 vtotal /= 2;
780 if (var->vmode & FB_VMODE_DOUBLE)
781 vtotal *= 2;
782
783 hfreq = pixclock/htotal;
784 mode->refresh = hfreq/vtotal;
785 }
786
787 /**
788 * fb_videomode_to_var - convert fb_videomode to fb_var_screeninfo
789 * @var: pointer to struct fb_var_screeninfo
790 * @mode: pointer to struct fb_videomode
791 */
792 void fb_videomode_to_var(struct fb_var_screeninfo *var,
793 const struct fb_videomode *mode)
794 {
795 var->xres = mode->xres;
796 var->yres = mode->yres;
797 var->xres_virtual = mode->xres;
798 var->yres_virtual = mode->yres;
799 var->xoffset = 0;
800 var->yoffset = 0;
801 var->pixclock = mode->pixclock;
802 var->left_margin = mode->left_margin;
803 var->right_margin = mode->right_margin;
804 var->upper_margin = mode->upper_margin;
805 var->lower_margin = mode->lower_margin;
806 var->hsync_len = mode->hsync_len;
807 var->vsync_len = mode->vsync_len;
808 var->sync = mode->sync;
809 var->vmode = mode->vmode & FB_VMODE_MASK;
810 }
811
812 /**
813 * fb_mode_is_equal - compare 2 videomodes
814 * @mode1: first videomode
815 * @mode2: second videomode
816 *
817 * RETURNS:
818 * 1 if equal, 0 if not
819 */
820 int fb_mode_is_equal(const struct fb_videomode *mode1,
821 const struct fb_videomode *mode2)
822 {
823 return (mode1->xres == mode2->xres &&
824 mode1->yres == mode2->yres &&
825 mode1->pixclock == mode2->pixclock &&
826 mode1->hsync_len == mode2->hsync_len &&
827 mode1->vsync_len == mode2->vsync_len &&
828 mode1->left_margin == mode2->left_margin &&
829 mode1->right_margin == mode2->right_margin &&
830 mode1->upper_margin == mode2->upper_margin &&
831 mode1->lower_margin == mode2->lower_margin &&
832 mode1->sync == mode2->sync &&
833 mode1->vmode == mode2->vmode);
834 }
835
836 /**
837 * fb_find_best_mode - find best matching videomode
838 * @var: pointer to struct fb_var_screeninfo
839 * @head: pointer to struct list_head of modelist
840 *
841 * RETURNS:
842 * struct fb_videomode, NULL if none found
843 *
844 * IMPORTANT:
845 * This function assumes that all modelist entries in
846 * info->modelist are valid.
847 *
848 * NOTES:
849 * Finds best matching videomode which has an equal or greater dimension than
850 * var->xres and var->yres. If more than 1 videomode is found, will return
851 * the videomode with the highest refresh rate
852 */
853 const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
854 struct list_head *head)
855 {
856 struct list_head *pos;
857 struct fb_modelist *modelist;
858 struct fb_videomode *mode, *best = NULL;
859 u32 diff = -1;
860
861 list_for_each(pos, head) {
862 u32 d;
863
864 modelist = list_entry(pos, struct fb_modelist, list);
865 mode = &modelist->mode;
866
867 if (mode->xres >= var->xres && mode->yres >= var->yres) {
868 d = (mode->xres - var->xres) +
869 (mode->yres - var->yres);
870 if (diff > d) {
871 diff = d;
872 best = mode;
873 } else if (diff == d && best &&
874 mode->refresh > best->refresh)
875 best = mode;
876 }
877 }
878 return best;
879 }
880
881 /**
882 * fb_find_nearest_mode - find closest videomode
883 *
884 * @mode: pointer to struct fb_videomode
885 * @head: pointer to modelist
886 *
887 * Finds best matching videomode, smaller or greater in dimension.
888 * If more than 1 videomode is found, will return the videomode with
889 * the closest refresh rate.
890 */
891 const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
892 struct list_head *head)
893 {
894 struct list_head *pos;
895 struct fb_modelist *modelist;
896 struct fb_videomode *cmode, *best = NULL;
897 u32 diff = -1, diff_refresh = -1;
898
899 list_for_each(pos, head) {
900 u32 d;
901
902 modelist = list_entry(pos, struct fb_modelist, list);
903 cmode = &modelist->mode;
904
905 d = abs(cmode->xres - mode->xres) +
906 abs(cmode->yres - mode->yres);
907 if (diff > d) {
908 diff = d;
909 diff_refresh = abs(cmode->refresh - mode->refresh);
910 best = cmode;
911 } else if (diff == d) {
912 d = abs(cmode->refresh - mode->refresh);
913 if (diff_refresh > d) {
914 diff_refresh = d;
915 best = cmode;
916 }
917 }
918 }
919
920 return best;
921 }
922
923 /**
924 * fb_match_mode - find a videomode which exactly matches the timings in var
925 * @var: pointer to struct fb_var_screeninfo
926 * @head: pointer to struct list_head of modelist
927 *
928 * RETURNS:
929 * struct fb_videomode, NULL if none found
930 */
931 const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
932 struct list_head *head)
933 {
934 struct list_head *pos;
935 struct fb_modelist *modelist;
936 struct fb_videomode *m, mode;
937
938 fb_var_to_videomode(&mode, var);
939 list_for_each(pos, head) {
940 modelist = list_entry(pos, struct fb_modelist, list);
941 m = &modelist->mode;
942 if (fb_mode_is_equal(m, &mode))
943 return m;
944 }
945 return NULL;
946 }
947
948 /**
949 * fb_add_videomode - adds videomode entry to modelist
950 * @mode: videomode to add
951 * @head: struct list_head of modelist
952 *
953 * NOTES:
954 * Will only add unmatched mode entries
955 */
956 int fb_add_videomode(const struct fb_videomode *mode, struct list_head *head)
957 {
958 struct list_head *pos;
959 struct fb_modelist *modelist;
960 struct fb_videomode *m;
961 int found = 0;
962
963 list_for_each(pos, head) {
964 modelist = list_entry(pos, struct fb_modelist, list);
965 m = &modelist->mode;
966 if (fb_mode_is_equal(m, mode)) {
967 found = 1;
968 break;
969 }
970 }
971 if (!found) {
972 modelist = kmalloc(sizeof(struct fb_modelist),
973 GFP_KERNEL);
974
975 if (!modelist)
976 return -ENOMEM;
977 modelist->mode = *mode;
978 list_add(&modelist->list, head);
979 }
980 return 0;
981 }
982
983 /**
984 * fb_delete_videomode - removed videomode entry from modelist
985 * @mode: videomode to remove
986 * @head: struct list_head of modelist
987 *
988 * NOTES:
989 * Will remove all matching mode entries
990 */
991 void fb_delete_videomode(const struct fb_videomode *mode,
992 struct list_head *head)
993 {
994 struct list_head *pos, *n;
995 struct fb_modelist *modelist;
996 struct fb_videomode *m;
997
998 list_for_each_safe(pos, n, head) {
999 modelist = list_entry(pos, struct fb_modelist, list);
1000 m = &modelist->mode;
1001 if (fb_mode_is_equal(m, mode)) {
1002 list_del(pos);
1003 kfree(pos);
1004 }
1005 }
1006 }
1007
1008 /**
1009 * fb_destroy_modelist - destroy modelist
1010 * @head: struct list_head of modelist
1011 */
1012 void fb_destroy_modelist(struct list_head *head)
1013 {
1014 struct list_head *pos, *n;
1015
1016 list_for_each_safe(pos, n, head) {
1017 list_del(pos);
1018 kfree(pos);
1019 }
1020 }
1021 EXPORT_SYMBOL_GPL(fb_destroy_modelist);
1022
1023 /**
1024 * fb_videomode_to_modelist - convert mode array to mode list
1025 * @modedb: array of struct fb_videomode
1026 * @num: number of entries in array
1027 * @head: struct list_head of modelist
1028 */
1029 void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
1030 struct list_head *head)
1031 {
1032 int i;
1033
1034 INIT_LIST_HEAD(head);
1035
1036 for (i = 0; i < num; i++) {
1037 if (fb_add_videomode(&modedb[i], head))
1038 return;
1039 }
1040 }
1041
1042 const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
1043 struct list_head *head)
1044 {
1045 struct list_head *pos;
1046 struct fb_modelist *modelist;
1047 const struct fb_videomode *m, *m1 = NULL, *md = NULL, *best = NULL;
1048 int first = 0;
1049
1050 if (!head->prev || !head->next || list_empty(head))
1051 goto finished;
1052
1053 /* get the first detailed mode and the very first mode */
1054 list_for_each(pos, head) {
1055 modelist = list_entry(pos, struct fb_modelist, list);
1056 m = &modelist->mode;
1057
1058 if (!first) {
1059 m1 = m;
1060 first = 1;
1061 }
1062
1063 if (m->flag & FB_MODE_IS_FIRST) {
1064 md = m;
1065 break;
1066 }
1067 }
1068
1069 /* first detailed timing is preferred */
1070 if (specs->misc & FB_MISC_1ST_DETAIL) {
1071 best = md;
1072 goto finished;
1073 }
1074
1075 /* find best mode based on display width and height */
1076 if (specs->max_x && specs->max_y) {
1077 struct fb_var_screeninfo var;
1078
1079 memset(&var, 0, sizeof(struct fb_var_screeninfo));
1080 var.xres = (specs->max_x * 7200)/254;
1081 var.yres = (specs->max_y * 7200)/254;
1082 m = fb_find_best_mode(&var, head);
1083 if (m) {
1084 best = m;
1085 goto finished;
1086 }
1087 }
1088
1089 /* use first detailed mode */
1090 if (md) {
1091 best = md;
1092 goto finished;
1093 }
1094
1095 /* last resort, use the very first mode */
1096 best = m1;
1097 finished:
1098 return best;
1099 }
1100 EXPORT_SYMBOL(fb_find_best_display);
1101
1102 EXPORT_SYMBOL(fb_videomode_to_var);
1103 EXPORT_SYMBOL(fb_var_to_videomode);
1104 EXPORT_SYMBOL(fb_mode_is_equal);
1105 EXPORT_SYMBOL(fb_add_videomode);
1106 EXPORT_SYMBOL(fb_match_mode);
1107 EXPORT_SYMBOL(fb_find_best_mode);
1108 EXPORT_SYMBOL(fb_find_nearest_mode);
1109 EXPORT_SYMBOL(fb_videomode_to_modelist);
1110 EXPORT_SYMBOL(fb_find_mode);
Linux kernel - Deliverables
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