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 /*
33 * Standard video mode definitions (taken from XFree86)
34 */
35
36 static const struct fb_videomode modedb[] = {
37
38 /* 640x400 @ 70 Hz, 31.5 kHz hsync */
39 { NULL, 70, 640, 400, 39721, 40, 24, 39, 9, 96, 2, 0,
40 FB_VMODE_NONINTERLACED },
41
42 /* 640x480 @ 60 Hz, 31.5 kHz hsync */
43 { NULL, 60, 640, 480, 39721, 40, 24, 32, 11, 96, 2, 0,
44 FB_VMODE_NONINTERLACED },
45
46 /* 800x600 @ 56 Hz, 35.15 kHz hsync */
47 { NULL, 56, 800, 600, 27777, 128, 24, 22, 1, 72, 2, 0,
48 FB_VMODE_NONINTERLACED },
49
50 /* 1024x768 @ 87 Hz interlaced, 35.5 kHz hsync */
51 { NULL, 87, 1024, 768, 22271, 56, 24, 33, 8, 160, 8, 0,
52 FB_VMODE_INTERLACED },
53
54 /* 640x400 @ 85 Hz, 37.86 kHz hsync */
55 { NULL, 85, 640, 400, 31746, 96, 32, 41, 1, 64, 3,
56 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED },
57
58 /* 640x480 @ 72 Hz, 36.5 kHz hsync */
59 { NULL, 72, 640, 480, 31746, 144, 40, 30, 8, 40, 3, 0,
60 FB_VMODE_NONINTERLACED },
61
62 /* 640x480 @ 75 Hz, 37.50 kHz hsync */
63 { NULL, 75, 640, 480, 31746, 120, 16, 16, 1, 64, 3, 0,
64 FB_VMODE_NONINTERLACED },
65
66 /* 800x600 @ 60 Hz, 37.8 kHz hsync */
67 { NULL, 60, 800, 600, 25000, 88, 40, 23, 1, 128, 4,
68 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
69 FB_VMODE_NONINTERLACED },
70
71 /* 640x480 @ 85 Hz, 43.27 kHz hsync */
72 { NULL, 85, 640, 480, 27777, 80, 56, 25, 1, 56, 3, 0,
73 FB_VMODE_NONINTERLACED },
74
75 /* 1152x864 @ 89 Hz interlaced, 44 kHz hsync */
76 { NULL, 89, 1152, 864, 15384, 96, 16, 110, 1, 216, 10, 0,
77 FB_VMODE_INTERLACED },
78 /* 800x600 @ 72 Hz, 48.0 kHz hsync */
79 { NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
80 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
81 FB_VMODE_NONINTERLACED },
82
83 /* 1024x768 @ 60 Hz, 48.4 kHz hsync */
84 { NULL, 60, 1024, 768, 15384, 168, 8, 29, 3, 144, 6, 0,
85 FB_VMODE_NONINTERLACED },
86
87 /* 640x480 @ 100 Hz, 53.01 kHz hsync */
88 { NULL, 100, 640, 480, 21834, 96, 32, 36, 8, 96, 6, 0,
89 FB_VMODE_NONINTERLACED },
90
91 /* 1152x864 @ 60 Hz, 53.5 kHz hsync */
92 { NULL, 60, 1152, 864, 11123, 208, 64, 16, 4, 256, 8, 0,
93 FB_VMODE_NONINTERLACED },
94
95 /* 800x600 @ 85 Hz, 55.84 kHz hsync */
96 { NULL, 85, 800, 600, 16460, 160, 64, 36, 16, 64, 5, 0,
97 FB_VMODE_NONINTERLACED },
98
99 /* 1024x768 @ 70 Hz, 56.5 kHz hsync */
100 { NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6, 0,
101 FB_VMODE_NONINTERLACED },
102
103 /* 1280x1024 @ 87 Hz interlaced, 51 kHz hsync */
104 { NULL, 87, 1280, 1024, 12500, 56, 16, 128, 1, 216, 12, 0,
105 FB_VMODE_INTERLACED },
106
107 /* 800x600 @ 100 Hz, 64.02 kHz hsync */
108 { NULL, 100, 800, 600, 14357, 160, 64, 30, 4, 64, 6, 0,
109 FB_VMODE_NONINTERLACED },
110
111 /* 1024x768 @ 76 Hz, 62.5 kHz hsync */
112 { NULL, 76, 1024, 768, 11764, 208, 8, 36, 16, 120, 3, 0,
113 FB_VMODE_NONINTERLACED },
114
115 /* 1152x864 @ 70 Hz, 62.4 kHz hsync */
116 { NULL, 70, 1152, 864, 10869, 106, 56, 20, 1, 160, 10, 0,
117 FB_VMODE_NONINTERLACED },
118
119 /* 1280x1024 @ 61 Hz, 64.2 kHz hsync */
120 { NULL, 61, 1280, 1024, 9090, 200, 48, 26, 1, 184, 3, 0,
121 FB_VMODE_NONINTERLACED },
122
123 /* 1400x1050 @ 60Hz, 63.9 kHz hsync */
124 { NULL, 60, 1400, 1050, 9259, 136, 40, 13, 1, 112, 3, 0,
125 FB_VMODE_NONINTERLACED },
126
127 /* 1400x1050 @ 75,107 Hz, 82,392 kHz +hsync +vsync*/
128 { NULL, 75, 1400, 1050, 7190, 120, 56, 23, 10, 112, 13,
129 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
130 FB_VMODE_NONINTERLACED },
131
132 /* 1400x1050 @ 60 Hz, ? kHz +hsync +vsync*/
133 { NULL, 60, 1400, 1050, 9259, 128, 40, 12, 0, 112, 3,
134 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
135 FB_VMODE_NONINTERLACED },
136
137 /* 1024x768 @ 85 Hz, 70.24 kHz hsync */
138 { NULL, 85, 1024, 768, 10111, 192, 32, 34, 14, 160, 6, 0,
139 FB_VMODE_NONINTERLACED },
140
141 /* 1152x864 @ 78 Hz, 70.8 kHz hsync */
142 { NULL, 78, 1152, 864, 9090, 228, 88, 32, 0, 84, 12, 0,
143 FB_VMODE_NONINTERLACED },
144
145 /* 1280x1024 @ 70 Hz, 74.59 kHz hsync */
146 { NULL, 70, 1280, 1024, 7905, 224, 32, 28, 8, 160, 8, 0,
147 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,
152 FB_VMODE_NONINTERLACED },
153
154 /* 1152x864 @ 84 Hz, 76.0 kHz hsync */
155 { NULL, 84, 1152, 864, 7407, 184, 312, 32, 0, 128, 12, 0,
156 FB_VMODE_NONINTERLACED },
157
158 /* 1280x1024 @ 74 Hz, 78.85 kHz hsync */
159 { NULL, 74, 1280, 1024, 7407, 256, 32, 34, 3, 144, 3, 0,
160 FB_VMODE_NONINTERLACED },
161
162 /* 1024x768 @ 100Hz, 80.21 kHz hsync */
163 { NULL, 100, 1024, 768, 8658, 192, 32, 21, 3, 192, 10, 0,
164 FB_VMODE_NONINTERLACED },
165
166 /* 1280x1024 @ 76 Hz, 81.13 kHz hsync */
167 { NULL, 76, 1280, 1024, 7407, 248, 32, 34, 3, 104, 3, 0,
168 FB_VMODE_NONINTERLACED },
169
170 /* 1600x1200 @ 70 Hz, 87.50 kHz hsync */
171 { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3, 0,
172 FB_VMODE_NONINTERLACED },
173
174 /* 1152x864 @ 100 Hz, 89.62 kHz hsync */
175 { NULL, 100, 1152, 864, 7264, 224, 32, 17, 2, 128, 19, 0,
176 FB_VMODE_NONINTERLACED },
177
178 /* 1280x1024 @ 85 Hz, 91.15 kHz hsync */
179 { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
180 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
181 FB_VMODE_NONINTERLACED },
182
183 /* 1600x1200 @ 75 Hz, 93.75 kHz hsync */
184 { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
185 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
186 FB_VMODE_NONINTERLACED },
187
188 /* 1680x1050 @ 60 Hz, 65.191 kHz hsync */
189 { NULL, 60, 1680, 1050, 6848, 280, 104, 30, 3, 176, 6,
190 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
191 FB_VMODE_NONINTERLACED },
192
193 /* 1600x1200 @ 85 Hz, 105.77 kHz hsync */
194 { NULL, 85, 1600, 1200, 4545, 272, 16, 37, 4, 192, 3,
195 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
196 FB_VMODE_NONINTERLACED },
197
198 /* 1280x1024 @ 100 Hz, 107.16 kHz hsync */
199 { NULL, 100, 1280, 1024, 5502, 256, 32, 26, 7, 128, 15, 0,
200 FB_VMODE_NONINTERLACED },
201
202 /* 1800x1440 @ 64Hz, 96.15 kHz hsync */
203 { NULL, 64, 1800, 1440, 4347, 304, 96, 46, 1, 192, 3,
204 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
205 FB_VMODE_NONINTERLACED },
206
207 /* 1800x1440 @ 70Hz, 104.52 kHz hsync */
208 { NULL, 70, 1800, 1440, 4000, 304, 96, 46, 1, 192, 3,
209 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
210 FB_VMODE_NONINTERLACED },
211
212 /* 512x384 @ 78 Hz, 31.50 kHz hsync */
213 { NULL, 78, 512, 384, 49603, 48, 16, 16, 1, 64, 3, 0,
214 FB_VMODE_NONINTERLACED },
215
216 /* 512x384 @ 85 Hz, 34.38 kHz hsync */
217 { NULL, 85, 512, 384, 45454, 48, 16, 16, 1, 64, 3, 0,
218 FB_VMODE_NONINTERLACED },
219
220 /* 320x200 @ 70 Hz, 31.5 kHz hsync, 8:5 aspect ratio */
221 { NULL, 70, 320, 200, 79440, 16, 16, 20, 4, 48, 1, 0,
222 FB_VMODE_DOUBLE },
223
224 /* 320x240 @ 60 Hz, 31.5 kHz hsync, 4:3 aspect ratio */
225 { NULL, 60, 320, 240, 79440, 16, 16, 16, 5, 48, 1, 0,
226 FB_VMODE_DOUBLE },
227
228 /* 320x240 @ 72 Hz, 36.5 kHz hsync */
229 { NULL, 72, 320, 240, 63492, 16, 16, 16, 4, 48, 2, 0,
230 FB_VMODE_DOUBLE },
231
232 /* 400x300 @ 56 Hz, 35.2 kHz hsync, 4:3 aspect ratio */
233 { NULL, 56, 400, 300, 55555, 64, 16, 10, 1, 32, 1, 0,
234 FB_VMODE_DOUBLE },
235
236 /* 400x300 @ 60 Hz, 37.8 kHz hsync */
237 { NULL, 60, 400, 300, 50000, 48, 16, 11, 1, 64, 2, 0,
238 FB_VMODE_DOUBLE },
239
240 /* 400x300 @ 72 Hz, 48.0 kHz hsync */
241 { NULL, 72, 400, 300, 40000, 32, 24, 11, 19, 64, 3, 0,
242 FB_VMODE_DOUBLE },
243
244 /* 480x300 @ 56 Hz, 35.2 kHz hsync, 8:5 aspect ratio */
245 { NULL, 56, 480, 300, 46176, 80, 16, 10, 1, 40, 1, 0,
246 FB_VMODE_DOUBLE },
247
248 /* 480x300 @ 60 Hz, 37.8 kHz hsync */
249 { NULL, 60, 480, 300, 41858, 56, 16, 11, 1, 80, 2, 0,
250 FB_VMODE_DOUBLE },
251
252 /* 480x300 @ 63 Hz, 39.6 kHz hsync */
253 { NULL, 63, 480, 300, 40000, 56, 16, 11, 1, 80, 2, 0,
254 FB_VMODE_DOUBLE },
255
256 /* 480x300 @ 72 Hz, 48.0 kHz hsync */
257 { NULL, 72, 480, 300, 33386, 40, 24, 11, 19, 80, 3, 0,
258 FB_VMODE_DOUBLE },
259
260 /* 1920x1200 @ 60 Hz, 74.5 Khz hsync */
261 { NULL, 60, 1920, 1200, 5177, 128, 336, 1, 38, 208, 3,
262 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
263 FB_VMODE_NONINTERLACED },
264
265 /* 1152x768, 60 Hz, PowerBook G4 Titanium I and II */
266 { NULL, 60, 1152, 768, 14047, 158, 26, 29, 3, 136, 6,
267 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
268 FB_VMODE_NONINTERLACED },
269
270 /* 1366x768, 60 Hz, 47.403 kHz hsync, WXGA 16:9 aspect ratio */
271 { NULL, 60, 1366, 768, 13806, 120, 10, 14, 3, 32, 5, 0,
272 FB_VMODE_NONINTERLACED },
273
274 /* 1280x800, 60 Hz, 47.403 kHz hsync, WXGA 16:10 aspect ratio */
275 { NULL, 60, 1280, 800, 12048, 200, 64, 24, 1, 136, 3, 0,
276 FB_VMODE_NONINTERLACED },
277
278 /* 720x576i @ 50 Hz, 15.625 kHz hsync (PAL RGB) */
279 { NULL, 50, 720, 576, 74074, 64, 16, 39, 5, 64, 5, 0,
280 FB_VMODE_INTERLACED },
281
282 /* 800x520i @ 50 Hz, 15.625 kHz hsync (PAL RGB) */
283 { NULL, 50, 800, 520, 58823, 144, 64, 72, 28, 80, 5, 0,
284 FB_VMODE_INTERLACED },
285
286 /* 864x480 @ 60 Hz, 35.15 kHz hsync */
287 { NULL, 60, 864, 480, 27777, 1, 1, 1, 1, 0, 0,
288 0, FB_VMODE_NONINTERLACED },
289 };
290
291 #ifdef CONFIG_FB_MODE_HELPERS
292 const struct fb_videomode cea_modes[64] = {
293 /* #1: 640x480p@59.94/60Hz */
294 [1] = {
295 NULL, 60, 640, 480, 39722, 48, 16, 33, 10, 96, 2, 0,
296 FB_VMODE_NONINTERLACED, 0,
297 },
298 /* #3: 720x480p@59.94/60Hz */
299 [3] = {
300 NULL, 60, 720, 480, 37037, 60, 16, 30, 9, 62, 6, 0,
301 FB_VMODE_NONINTERLACED, 0,
302 },
303 /* #5: 1920x1080i@59.94/60Hz */
304 [5] = {
305 NULL, 60, 1920, 1080, 13763, 148, 88, 15, 2, 44, 5,
306 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
307 FB_VMODE_INTERLACED, 0,
308 },
309 /* #7: 720(1440)x480iH@59.94/60Hz */
310 [7] = {
311 NULL, 60, 1440, 480, 18554/*37108*/, 114, 38, 15, 4, 124, 3, 0,
312 FB_VMODE_INTERLACED, 0,
313 },
314 /* #9: 720(1440)x240pH@59.94/60Hz */
315 [9] = {
316 NULL, 60, 1440, 240, 18554, 114, 38, 16, 4, 124, 3, 0,
317 FB_VMODE_NONINTERLACED, 0,
318 },
319 /* #18: 720x576pH@50Hz */
320 [18] = {
321 NULL, 50, 720, 576, 37037, 68, 12, 39, 5, 64, 5, 0,
322 FB_VMODE_NONINTERLACED, 0,
323 },
324 /* #19: 1280x720p@50Hz */
325 [19] = {
326 NULL, 50, 1280, 720, 13468, 220, 440, 20, 5, 40, 5,
327 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
328 FB_VMODE_NONINTERLACED, 0,
329 },
330 /* #20: 1920x1080i@50Hz */
331 [20] = {
332 NULL, 50, 1920, 1080, 13480, 148, 528, 15, 5, 528, 5,
333 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
334 FB_VMODE_INTERLACED, 0,
335 },
336 /* #32: 1920x1080p@23.98/24Hz */
337 [32] = {
338 NULL, 24, 1920, 1080, 13468, 148, 638, 36, 4, 44, 5,
339 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
340 FB_VMODE_NONINTERLACED, 0,
341 },
342 /* #35: (2880)x480p4x@59.94/60Hz */
343 [35] = {
344 NULL, 60, 2880, 480, 9250, 240, 64, 30, 9, 248, 6, 0,
345 FB_VMODE_NONINTERLACED, 0,
346 },
347 };
348
349 const struct fb_videomode vesa_modes[] = {
350 /* 0 640x350-85 VESA */
351 { NULL, 85, 640, 350, 31746, 96, 32, 60, 32, 64, 3,
352 FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA},
353 /* 1 640x400-85 VESA */
354 { NULL, 85, 640, 400, 31746, 96, 32, 41, 01, 64, 3,
355 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
356 /* 2 720x400-85 VESA */
357 { NULL, 85, 721, 400, 28169, 108, 36, 42, 01, 72, 3,
358 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
359 /* 3 640x480-60 VESA */
360 { NULL, 60, 640, 480, 39682, 48, 16, 33, 10, 96, 2,
361 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
362 /* 4 640x480-72 VESA */
363 { NULL, 72, 640, 480, 31746, 128, 24, 29, 9, 40, 2,
364 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
365 /* 5 640x480-75 VESA */
366 { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
367 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
368 /* 6 640x480-85 VESA */
369 { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
370 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
371 /* 7 800x600-56 VESA */
372 { NULL, 56, 800, 600, 27777, 128, 24, 22, 01, 72, 2,
373 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
374 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
375 /* 8 800x600-60 VESA */
376 { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
377 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
378 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
379 /* 9 800x600-72 VESA */
380 { NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
381 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
382 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
383 /* 10 800x600-75 VESA */
384 { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
385 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
386 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
387 /* 11 800x600-85 VESA */
388 { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
389 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
390 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
391 /* 12 1024x768i-43 VESA */
392 { NULL, 43, 1024, 768, 22271, 56, 8, 41, 0, 176, 8,
393 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
394 FB_VMODE_INTERLACED, FB_MODE_IS_VESA },
395 /* 13 1024x768-60 VESA */
396 { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
397 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
398 /* 14 1024x768-70 VESA */
399 { NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6,
400 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
401 /* 15 1024x768-75 VESA */
402 { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
403 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
404 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
405 /* 16 1024x768-85 VESA */
406 { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
407 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
408 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
409 /* 17 1152x864-75 VESA */
410 { NULL, 75, 1152, 864, 9259, 256, 64, 32, 1, 128, 3,
411 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
412 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
413 /* 18 1280x960-60 VESA */
414 { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
415 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
416 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
417 /* 19 1280x960-85 VESA */
418 { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
419 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
420 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
421 /* 20 1280x1024-60 VESA */
422 { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
423 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
424 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
425 /* 21 1280x1024-75 VESA */
426 { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
427 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
428 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
429 /* 22 1280x1024-85 VESA */
430 { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
431 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
432 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
433 /* 23 1600x1200-60 VESA */
434 { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
435 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
436 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
437 /* 24 1600x1200-65 VESA */
438 { NULL, 65, 1600, 1200, 5698, 304, 64, 46, 1, 192, 3,
439 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
440 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
441 /* 25 1600x1200-70 VESA */
442 { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
443 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
444 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
445 /* 26 1600x1200-75 VESA */
446 { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
447 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
448 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
449 /* 27 1600x1200-85 VESA */
450 { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
451 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
452 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
453 /* 28 1792x1344-60 VESA */
454 { NULL, 60, 1792, 1344, 4882, 328, 128, 46, 1, 200, 3,
455 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
456 /* 29 1792x1344-75 VESA */
457 { NULL, 75, 1792, 1344, 3831, 352, 96, 69, 1, 216, 3,
458 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
459 /* 30 1856x1392-60 VESA */
460 { NULL, 60, 1856, 1392, 4580, 352, 96, 43, 1, 224, 3,
461 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
462 /* 31 1856x1392-75 VESA */
463 { NULL, 75, 1856, 1392, 3472, 352, 128, 104, 1, 224, 3,
464 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
465 /* 32 1920x1440-60 VESA */
466 { NULL, 60, 1920, 1440, 4273, 344, 128, 56, 1, 200, 3,
467 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
468 /* 33 1920x1440-75 VESA */
469 { NULL, 75, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3,
470 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
471 };
472 EXPORT_SYMBOL(vesa_modes);
473 #endif /* CONFIG_FB_MODE_HELPERS */
474
475 /**
476 * fb_try_mode - test a video mode
477 * @var: frame buffer user defined part of display
478 * @info: frame buffer info structure
479 * @mode: frame buffer video mode structure
480 * @bpp: color depth in bits per pixel
481 *
482 * Tries a video mode to test it's validity for device @info.
483 *
484 * Returns 1 on success.
485 *
486 */
487
fb_try_mode(struct fb_var_screeninfo * var,struct fb_info * info,const struct fb_videomode * mode,unsigned int bpp)488 static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
489 const struct fb_videomode *mode, unsigned int bpp)
490 {
491 int err = 0;
492
493 DPRINTK("Trying mode %s %dx%d-%d@%d\n",
494 mode->name ? mode->name : "noname",
495 mode->xres, mode->yres, bpp, mode->refresh);
496 var->xres = mode->xres;
497 var->yres = mode->yres;
498 var->xres_virtual = mode->xres;
499 var->yres_virtual = mode->yres;
500 var->xoffset = 0;
501 var->yoffset = 0;
502 var->bits_per_pixel = bpp;
503 var->activate |= FB_ACTIVATE_TEST;
504 var->pixclock = mode->pixclock;
505 var->left_margin = mode->left_margin;
506 var->right_margin = mode->right_margin;
507 var->upper_margin = mode->upper_margin;
508 var->lower_margin = mode->lower_margin;
509 var->hsync_len = mode->hsync_len;
510 var->vsync_len = mode->vsync_len;
511 var->sync = mode->sync;
512 var->vmode = mode->vmode;
513 if (info->fbops->fb_check_var)
514 err = info->fbops->fb_check_var(var, info);
515 var->activate &= ~FB_ACTIVATE_TEST;
516 return err;
517 }
518
519 /**
520 * fb_find_mode - finds a valid video mode
521 * @var: frame buffer user defined part of display
522 * @info: frame buffer info structure
523 * @mode_option: string video mode to find
524 * @db: video mode database
525 * @dbsize: size of @db
526 * @default_mode: default video mode to fall back to
527 * @default_bpp: default color depth in bits per pixel
528 *
529 * Finds a suitable video mode, starting with the specified mode
530 * in @mode_option with fallback to @default_mode. If
531 * @default_mode fails, all modes in the video mode database will
532 * be tried.
533 *
534 * Valid mode specifiers for @mode_option:
535 *
536 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m] or
537 * <name>[-<bpp>][@<refresh>]
538 *
539 * with <xres>, <yres>, <bpp> and <refresh> decimal numbers and
540 * <name> a string.
541 *
542 * If 'M' is present after yres (and before refresh/bpp if present),
543 * the function will compute the timings using VESA(tm) Coordinated
544 * Video Timings (CVT). If 'R' is present after 'M', will compute with
545 * reduced blanking (for flatpanels). If 'i' is present, compute
546 * interlaced mode. If 'm' is present, add margins equal to 1.8%
547 * of xres rounded down to 8 pixels, and 1.8% of yres. The char
548 * 'i' and 'm' must be after 'M' and 'R'. Example:
549 *
550 * 1024x768MR-8@60m - Reduced blank with margins at 60Hz.
551 *
552 * NOTE: The passed struct @var is _not_ cleared! This allows you
553 * to supply values for e.g. the grayscale and accel_flags fields.
554 *
555 * Returns zero for failure, 1 if using specified @mode_option,
556 * 2 if using specified @mode_option with an ignored refresh rate,
557 * 3 if default mode is used, 4 if fall back to any valid mode.
558 *
559 */
560
fb_find_mode(struct fb_var_screeninfo * var,struct fb_info * info,const char * mode_option,const struct fb_videomode * db,unsigned int dbsize,const struct fb_videomode * default_mode,unsigned int default_bpp)561 int fb_find_mode(struct fb_var_screeninfo *var,
562 struct fb_info *info, const char *mode_option,
563 const struct fb_videomode *db, unsigned int dbsize,
564 const struct fb_videomode *default_mode,
565 unsigned int default_bpp)
566 {
567 int i;
568
569 /* Set up defaults */
570 if (!db) {
571 db = modedb;
572 dbsize = ARRAY_SIZE(modedb);
573 }
574
575 if (!default_mode)
576 default_mode = &db[0];
577
578 if (!default_bpp)
579 default_bpp = 8;
580
581 /* Did the user specify a video mode? */
582 if (!mode_option)
583 mode_option = fb_mode_option;
584 if (mode_option) {
585 const char *name = mode_option;
586 unsigned int namelen = strlen(name);
587 int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
588 unsigned int xres = 0, yres = 0, bpp = default_bpp, refresh = 0;
589 int yres_specified = 0, cvt = 0, rb = 0, interlace = 0;
590 int margins = 0;
591 u32 best, diff, tdiff;
592
593 for (i = namelen-1; i >= 0; i--) {
594 switch (name[i]) {
595 case '@':
596 namelen = i;
597 if (!refresh_specified && !bpp_specified &&
598 !yres_specified) {
599 refresh = simple_strtol(&name[i+1], NULL,
600 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,
611 10);
612 bpp_specified = 1;
613 if (cvt || rb)
614 cvt = 0;
615 } else
616 goto done;
617 break;
618 case 'x':
619 if (!yres_specified) {
620 yres = simple_strtol(&name[i+1], NULL,
621 10);
622 yres_specified = 1;
623 } else
624 goto done;
625 break;
626 case '0' ... '9':
627 break;
628 case 'M':
629 if (!yres_specified)
630 cvt = 1;
631 break;
632 case 'R':
633 if (!cvt)
634 rb = 1;
635 break;
636 case 'm':
637 if (!cvt)
638 margins = 1;
639 break;
640 case 'i':
641 if (!cvt)
642 interlace = 1;
643 break;
644 default:
645 goto done;
646 }
647 }
648 if (i < 0 && yres_specified) {
649 xres = simple_strtol(name, NULL, 10);
650 res_specified = 1;
651 }
652 done:
653 if (cvt) {
654 struct fb_videomode cvt_mode;
655 int ret;
656
657 DPRINTK("CVT mode %dx%d@%dHz%s%s%s\n", xres, yres,
658 (refresh) ? refresh : 60,
659 (rb) ? " reduced blanking" : "",
660 (margins) ? " with margins" : "",
661 (interlace) ? " interlaced" : "");
662
663 memset(&cvt_mode, 0, sizeof(cvt_mode));
664 cvt_mode.xres = xres;
665 cvt_mode.yres = yres;
666 cvt_mode.refresh = (refresh) ? refresh : 60;
667
668 if (interlace)
669 cvt_mode.vmode |= FB_VMODE_INTERLACED;
670 else
671 cvt_mode.vmode &= ~FB_VMODE_INTERLACED;
672
673 ret = fb_find_mode_cvt(&cvt_mode, margins, rb);
674
675 if (!ret && !fb_try_mode(var, info, &cvt_mode, bpp)) {
676 DPRINTK("modedb CVT: CVT mode ok\n");
677 return 1;
678 }
679
680 DPRINTK("CVT mode invalid, getting mode from database\n");
681 }
682
683 DPRINTK("Trying specified video mode%s %ix%i\n",
684 refresh_specified ? "" : " (ignoring refresh rate)",
685 xres, yres);
686
687 if (!refresh_specified) {
688 /*
689 * If the caller has provided a custom mode database and
690 * a valid monspecs structure, we look for the mode with
691 * the highest refresh rate. Otherwise we play it safe
692 * it and try to find a mode with a refresh rate closest
693 * to the standard 60 Hz.
694 */
695 if (db != modedb &&
696 info->monspecs.vfmin && info->monspecs.vfmax &&
697 info->monspecs.hfmin && info->monspecs.hfmax &&
698 info->monspecs.dclkmax) {
699 refresh = 1000;
700 } else {
701 refresh = 60;
702 }
703 }
704
705 diff = -1;
706 best = -1;
707 for (i = 0; i < dbsize; i++) {
708 if ((name_matches(db[i], name, namelen) ||
709 (res_specified && res_matches(db[i], xres, yres))) &&
710 !fb_try_mode(var, info, &db[i], bpp)) {
711 if (refresh_specified && db[i].refresh == refresh)
712 return 1;
713
714 if (abs(db[i].refresh - refresh) < diff) {
715 diff = abs(db[i].refresh - refresh);
716 best = i;
717 }
718 }
719 }
720 if (best != -1) {
721 fb_try_mode(var, info, &db[best], bpp);
722 return (refresh_specified) ? 2 : 1;
723 }
724
725 diff = 2 * (xres + yres);
726 best = -1;
727 DPRINTK("Trying best-fit modes\n");
728 for (i = 0; i < dbsize; i++) {
729 DPRINTK("Trying %ix%i\n", db[i].xres, db[i].yres);
730 if (!fb_try_mode(var, info, &db[i], bpp)) {
731 tdiff = abs(db[i].xres - xres) +
732 abs(db[i].yres - yres);
733
734 /*
735 * Penalize modes with resolutions smaller
736 * than requested.
737 */
738 if (xres > db[i].xres || yres > db[i].yres)
739 tdiff += xres + yres;
740
741 if (diff > tdiff) {
742 diff = tdiff;
743 best = i;
744 }
745 }
746 }
747 if (best != -1) {
748 fb_try_mode(var, info, &db[best], bpp);
749 return 5;
750 }
751 }
752
753 DPRINTK("Trying default video mode\n");
754 if (!fb_try_mode(var, info, default_mode, default_bpp))
755 return 3;
756
757 DPRINTK("Trying all modes\n");
758 for (i = 0; i < dbsize; i++)
759 if (!fb_try_mode(var, info, &db[i], default_bpp))
760 return 4;
761
762 DPRINTK("No valid mode found\n");
763 return 0;
764 }
765
766 /**
767 * fb_var_to_videomode - convert fb_var_screeninfo to fb_videomode
768 * @mode: pointer to struct fb_videomode
769 * @var: pointer to struct fb_var_screeninfo
770 */
fb_var_to_videomode(struct fb_videomode * mode,const struct fb_var_screeninfo * var)771 void fb_var_to_videomode(struct fb_videomode *mode,
772 const struct fb_var_screeninfo *var)
773 {
774 u32 pixclock, hfreq, htotal, vtotal;
775
776 mode->name = NULL;
777 mode->xres = var->xres;
778 mode->yres = var->yres;
779 mode->pixclock = var->pixclock;
780 mode->hsync_len = var->hsync_len;
781 mode->vsync_len = var->vsync_len;
782 mode->left_margin = var->left_margin;
783 mode->right_margin = var->right_margin;
784 mode->upper_margin = var->upper_margin;
785 mode->lower_margin = var->lower_margin;
786 mode->sync = var->sync;
787 mode->vmode = var->vmode & FB_VMODE_MASK;
788 mode->flag = FB_MODE_IS_FROM_VAR;
789 mode->refresh = 0;
790
791 if (!var->pixclock)
792 return;
793
794 pixclock = PICOS2KHZ(var->pixclock) * 1000;
795
796 htotal = var->xres + var->right_margin + var->hsync_len +
797 var->left_margin;
798 vtotal = var->yres + var->lower_margin + var->vsync_len +
799 var->upper_margin;
800
801 if (var->vmode & FB_VMODE_INTERLACED)
802 vtotal /= 2;
803 if (var->vmode & FB_VMODE_DOUBLE)
804 vtotal *= 2;
805
806 hfreq = pixclock/htotal;
807 mode->refresh = hfreq/vtotal;
808 }
809
810 /**
811 * fb_videomode_to_var - convert fb_videomode to fb_var_screeninfo
812 * @var: pointer to struct fb_var_screeninfo
813 * @mode: pointer to struct fb_videomode
814 */
fb_videomode_to_var(struct fb_var_screeninfo * var,const struct fb_videomode * mode)815 void fb_videomode_to_var(struct fb_var_screeninfo *var,
816 const struct fb_videomode *mode)
817 {
818 var->xres = mode->xres;
819 var->yres = mode->yres;
820 var->xres_virtual = mode->xres;
821 var->yres_virtual = mode->yres;
822 var->xoffset = 0;
823 var->yoffset = 0;
824 var->pixclock = mode->pixclock;
825 var->left_margin = mode->left_margin;
826 var->right_margin = mode->right_margin;
827 var->upper_margin = mode->upper_margin;
828 var->lower_margin = mode->lower_margin;
829 var->hsync_len = mode->hsync_len;
830 var->vsync_len = mode->vsync_len;
831 var->sync = mode->sync;
832 var->vmode = mode->vmode & FB_VMODE_MASK;
833 }
834
835 /**
836 * fb_mode_is_equal - compare 2 videomodes
837 * @mode1: first videomode
838 * @mode2: second videomode
839 *
840 * RETURNS:
841 * 1 if equal, 0 if not
842 */
fb_mode_is_equal(const struct fb_videomode * mode1,const struct fb_videomode * mode2)843 int fb_mode_is_equal(const struct fb_videomode *mode1,
844 const struct fb_videomode *mode2)
845 {
846 return (mode1->xres == mode2->xres &&
847 mode1->yres == mode2->yres &&
848 mode1->pixclock == mode2->pixclock &&
849 mode1->hsync_len == mode2->hsync_len &&
850 mode1->vsync_len == mode2->vsync_len &&
851 mode1->left_margin == mode2->left_margin &&
852 mode1->right_margin == mode2->right_margin &&
853 mode1->upper_margin == mode2->upper_margin &&
854 mode1->lower_margin == mode2->lower_margin &&
855 mode1->sync == mode2->sync &&
856 mode1->vmode == mode2->vmode);
857 }
858
859 /**
860 * fb_find_best_mode - find best matching videomode
861 * @var: pointer to struct fb_var_screeninfo
862 * @head: pointer to struct list_head of modelist
863 *
864 * RETURNS:
865 * struct fb_videomode, NULL if none found
866 *
867 * IMPORTANT:
868 * This function assumes that all modelist entries in
869 * info->modelist are valid.
870 *
871 * NOTES:
872 * Finds best matching videomode which has an equal or greater dimension than
873 * var->xres and var->yres. If more than 1 videomode is found, will return
874 * the videomode with the highest refresh rate
875 */
fb_find_best_mode(const struct fb_var_screeninfo * var,struct list_head * head)876 const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
877 struct list_head *head)
878 {
879 struct list_head *pos;
880 struct fb_modelist *modelist;
881 struct fb_videomode *mode, *best = NULL;
882 u32 diff = -1;
883
884 list_for_each(pos, head) {
885 u32 d;
886
887 modelist = list_entry(pos, struct fb_modelist, list);
888 mode = &modelist->mode;
889
890 if (mode->xres >= var->xres && mode->yres >= var->yres) {
891 d = (mode->xres - var->xres) +
892 (mode->yres - var->yres);
893 if (diff > d) {
894 diff = d;
895 best = mode;
896 } else if (diff == d && best &&
897 mode->refresh > best->refresh)
898 best = mode;
899 }
900 }
901 return best;
902 }
903
904 /**
905 * fb_find_nearest_mode - find closest videomode
906 *
907 * @mode: pointer to struct fb_videomode
908 * @head: pointer to modelist
909 *
910 * Finds best matching videomode, smaller or greater in dimension.
911 * If more than 1 videomode is found, will return the videomode with
912 * the closest refresh rate.
913 */
fb_find_nearest_mode(const struct fb_videomode * mode,struct list_head * head)914 const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
915 struct list_head *head)
916 {
917 struct list_head *pos;
918 struct fb_modelist *modelist;
919 struct fb_videomode *cmode, *best = NULL;
920 u32 diff = -1, diff_refresh = -1;
921
922 list_for_each(pos, head) {
923 u32 d;
924
925 modelist = list_entry(pos, struct fb_modelist, list);
926 cmode = &modelist->mode;
927
928 d = abs(cmode->xres - mode->xres) +
929 abs(cmode->yres - mode->yres);
930 if (diff > d) {
931 diff = d;
932 diff_refresh = abs(cmode->refresh - mode->refresh);
933 best = cmode;
934 } else if (diff == d) {
935 d = abs(cmode->refresh - mode->refresh);
936 if (diff_refresh > d) {
937 diff_refresh = d;
938 best = cmode;
939 }
940 }
941 }
942
943 return best;
944 }
945
946 /**
947 * fb_match_mode - find a videomode which exactly matches the timings in var
948 * @var: pointer to struct fb_var_screeninfo
949 * @head: pointer to struct list_head of modelist
950 *
951 * RETURNS:
952 * struct fb_videomode, NULL if none found
953 */
fb_match_mode(const struct fb_var_screeninfo * var,struct list_head * head)954 const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
955 struct list_head *head)
956 {
957 struct list_head *pos;
958 struct fb_modelist *modelist;
959 struct fb_videomode *m, mode;
960
961 fb_var_to_videomode(&mode, var);
962 list_for_each(pos, head) {
963 modelist = list_entry(pos, struct fb_modelist, list);
964 m = &modelist->mode;
965 if (fb_mode_is_equal(m, &mode))
966 return m;
967 }
968 return NULL;
969 }
970
971 /**
972 * fb_add_videomode - adds videomode entry to modelist
973 * @mode: videomode to add
974 * @head: struct list_head of modelist
975 *
976 * NOTES:
977 * Will only add unmatched mode entries
978 */
fb_add_videomode(const struct fb_videomode * mode,struct list_head * head)979 int fb_add_videomode(const struct fb_videomode *mode, struct list_head *head)
980 {
981 struct list_head *pos;
982 struct fb_modelist *modelist;
983 struct fb_videomode *m;
984 int found = 0;
985
986 list_for_each(pos, head) {
987 modelist = list_entry(pos, struct fb_modelist, list);
988 m = &modelist->mode;
989 if (fb_mode_is_equal(m, mode)) {
990 found = 1;
991 break;
992 }
993 }
994 if (!found) {
995 modelist = kmalloc(sizeof(struct fb_modelist),
996 GFP_KERNEL);
997
998 if (!modelist)
999 return -ENOMEM;
1000 modelist->mode = *mode;
1001 list_add(&modelist->list, head);
1002 }
1003 return 0;
1004 }
1005
1006 /**
1007 * fb_delete_videomode - removed videomode entry from modelist
1008 * @mode: videomode to remove
1009 * @head: struct list_head of modelist
1010 *
1011 * NOTES:
1012 * Will remove all matching mode entries
1013 */
fb_delete_videomode(const struct fb_videomode * mode,struct list_head * head)1014 void fb_delete_videomode(const struct fb_videomode *mode,
1015 struct list_head *head)
1016 {
1017 struct list_head *pos, *n;
1018 struct fb_modelist *modelist;
1019 struct fb_videomode *m;
1020
1021 list_for_each_safe(pos, n, head) {
1022 modelist = list_entry(pos, struct fb_modelist, list);
1023 m = &modelist->mode;
1024 if (fb_mode_is_equal(m, mode)) {
1025 list_del(pos);
1026 kfree(pos);
1027 }
1028 }
1029 }
1030
1031 /**
1032 * fb_destroy_modelist - destroy modelist
1033 * @head: struct list_head of modelist
1034 */
fb_destroy_modelist(struct list_head * head)1035 void fb_destroy_modelist(struct list_head *head)
1036 {
1037 struct list_head *pos, *n;
1038
1039 list_for_each_safe(pos, n, head) {
1040 list_del(pos);
1041 kfree(pos);
1042 }
1043 }
1044 EXPORT_SYMBOL_GPL(fb_destroy_modelist);
1045
1046 /**
1047 * fb_videomode_to_modelist - convert mode array to mode list
1048 * @modedb: array of struct fb_videomode
1049 * @num: number of entries in array
1050 * @head: struct list_head of modelist
1051 */
fb_videomode_to_modelist(const struct fb_videomode * modedb,int num,struct list_head * head)1052 void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
1053 struct list_head *head)
1054 {
1055 int i;
1056
1057 INIT_LIST_HEAD(head);
1058
1059 for (i = 0; i < num; i++) {
1060 if (fb_add_videomode(&modedb[i], head))
1061 return;
1062 }
1063 }
1064
fb_find_best_display(const struct fb_monspecs * specs,struct list_head * head)1065 const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
1066 struct list_head *head)
1067 {
1068 struct list_head *pos;
1069 struct fb_modelist *modelist;
1070 const struct fb_videomode *m, *m1 = NULL, *md = NULL, *best = NULL;
1071 int first = 0;
1072
1073 if (!head->prev || !head->next || list_empty(head))
1074 goto finished;
1075
1076 /* get the first detailed mode and the very first mode */
1077 list_for_each(pos, head) {
1078 modelist = list_entry(pos, struct fb_modelist, list);
1079 m = &modelist->mode;
1080
1081 if (!first) {
1082 m1 = m;
1083 first = 1;
1084 }
1085
1086 if (m->flag & FB_MODE_IS_FIRST) {
1087 md = m;
1088 break;
1089 }
1090 }
1091
1092 /* first detailed timing is preferred */
1093 if (specs->misc & FB_MISC_1ST_DETAIL) {
1094 best = md;
1095 goto finished;
1096 }
1097
1098 /* find best mode based on display width and height */
1099 if (specs->max_x && specs->max_y) {
1100 struct fb_var_screeninfo var;
1101
1102 memset(&var, 0, sizeof(struct fb_var_screeninfo));
1103 var.xres = (specs->max_x * 7200)/254;
1104 var.yres = (specs->max_y * 7200)/254;
1105 m = fb_find_best_mode(&var, head);
1106 if (m) {
1107 best = m;
1108 goto finished;
1109 }
1110 }
1111
1112 /* use first detailed mode */
1113 if (md) {
1114 best = md;
1115 goto finished;
1116 }
1117
1118 /* last resort, use the very first mode */
1119 best = m1;
1120 finished:
1121 return best;
1122 }
1123 EXPORT_SYMBOL(fb_find_best_display);
1124
1125 EXPORT_SYMBOL(fb_videomode_to_var);
1126 EXPORT_SYMBOL(fb_var_to_videomode);
1127 EXPORT_SYMBOL(fb_mode_is_equal);
1128 EXPORT_SYMBOL(fb_add_videomode);
1129 EXPORT_SYMBOL(fb_match_mode);
1130 EXPORT_SYMBOL(fb_find_best_mode);
1131 EXPORT_SYMBOL(fb_find_nearest_mode);
1132 EXPORT_SYMBOL(fb_videomode_to_modelist);
1133 EXPORT_SYMBOL(fb_find_mode);
1134 EXPORT_SYMBOL(fb_find_mode_cvt);
1135