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 /* 1920x1080 @ 60 Hz, 67.3 kHz hsync */
261 { NULL, 60, 1920, 1080, 6734, 148, 88, 36, 4, 44, 5, 0,
262 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
263 FB_VMODE_NONINTERLACED },
264
265 /* 1920x1200 @ 60 Hz, 74.5 Khz hsync */
266 { NULL, 60, 1920, 1200, 5177, 128, 336, 1, 38, 208, 3,
267 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
268 FB_VMODE_NONINTERLACED },
269
270 /* 1152x768, 60 Hz, PowerBook G4 Titanium I and II */
271 { NULL, 60, 1152, 768, 14047, 158, 26, 29, 3, 136, 6,
272 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
273 FB_VMODE_NONINTERLACED },
274
275 /* 1366x768, 60 Hz, 47.403 kHz hsync, WXGA 16:9 aspect ratio */
276 { NULL, 60, 1366, 768, 13806, 120, 10, 14, 3, 32, 5, 0,
277 FB_VMODE_NONINTERLACED },
278
279 /* 1280x800, 60 Hz, 47.403 kHz hsync, WXGA 16:10 aspect ratio */
280 { NULL, 60, 1280, 800, 12048, 200, 64, 24, 1, 136, 3, 0,
281 FB_VMODE_NONINTERLACED },
282
283 /* 720x576i @ 50 Hz, 15.625 kHz hsync (PAL RGB) */
284 { NULL, 50, 720, 576, 74074, 64, 16, 39, 5, 64, 5, 0,
285 FB_VMODE_INTERLACED },
286
287 /* 800x520i @ 50 Hz, 15.625 kHz hsync (PAL RGB) */
288 { NULL, 50, 800, 520, 58823, 144, 64, 72, 28, 80, 5, 0,
289 FB_VMODE_INTERLACED },
290
291 /* 864x480 @ 60 Hz, 35.15 kHz hsync */
292 { NULL, 60, 864, 480, 27777, 1, 1, 1, 1, 0, 0,
293 0, FB_VMODE_NONINTERLACED },
294 };
295
296 #ifdef CONFIG_FB_MODE_HELPERS
297 const struct fb_videomode vesa_modes[] = {
298 /* 0 640x350-85 VESA */
299 { NULL, 85, 640, 350, 31746, 96, 32, 60, 32, 64, 3,
300 FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA},
301 /* 1 640x400-85 VESA */
302 { NULL, 85, 640, 400, 31746, 96, 32, 41, 01, 64, 3,
303 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
304 /* 2 720x400-85 VESA */
305 { NULL, 85, 721, 400, 28169, 108, 36, 42, 01, 72, 3,
306 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
307 /* 3 640x480-60 VESA */
308 { NULL, 60, 640, 480, 39682, 48, 16, 33, 10, 96, 2,
309 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
310 /* 4 640x480-72 VESA */
311 { NULL, 72, 640, 480, 31746, 128, 24, 29, 9, 40, 2,
312 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
313 /* 5 640x480-75 VESA */
314 { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
315 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
316 /* 6 640x480-85 VESA */
317 { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
318 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
319 /* 7 800x600-56 VESA */
320 { NULL, 56, 800, 600, 27777, 128, 24, 22, 01, 72, 2,
321 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
322 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
323 /* 8 800x600-60 VESA */
324 { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
325 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
326 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
327 /* 9 800x600-72 VESA */
328 { NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
329 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
330 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
331 /* 10 800x600-75 VESA */
332 { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
333 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
334 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
335 /* 11 800x600-85 VESA */
336 { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
337 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
338 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
339 /* 12 1024x768i-43 VESA */
340 { NULL, 43, 1024, 768, 22271, 56, 8, 41, 0, 176, 8,
341 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
342 FB_VMODE_INTERLACED, FB_MODE_IS_VESA },
343 /* 13 1024x768-60 VESA */
344 { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
345 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
346 /* 14 1024x768-70 VESA */
347 { NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6,
348 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
349 /* 15 1024x768-75 VESA */
350 { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
351 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
352 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
353 /* 16 1024x768-85 VESA */
354 { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
355 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
356 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
357 /* 17 1152x864-75 VESA */
358 { NULL, 75, 1152, 864, 9259, 256, 64, 32, 1, 128, 3,
359 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
360 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
361 /* 18 1280x960-60 VESA */
362 { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
363 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
364 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
365 /* 19 1280x960-85 VESA */
366 { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
367 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
368 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
369 /* 20 1280x1024-60 VESA */
370 { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
371 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
372 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
373 /* 21 1280x1024-75 VESA */
374 { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
375 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
376 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
377 /* 22 1280x1024-85 VESA */
378 { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
379 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
380 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
381 /* 23 1600x1200-60 VESA */
382 { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
383 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
384 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
385 /* 24 1600x1200-65 VESA */
386 { NULL, 65, 1600, 1200, 5698, 304, 64, 46, 1, 192, 3,
387 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
388 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
389 /* 25 1600x1200-70 VESA */
390 { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
391 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
392 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
393 /* 26 1600x1200-75 VESA */
394 { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
395 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
396 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
397 /* 27 1600x1200-85 VESA */
398 { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
399 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
400 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
401 /* 28 1792x1344-60 VESA */
402 { NULL, 60, 1792, 1344, 4882, 328, 128, 46, 1, 200, 3,
403 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
404 /* 29 1792x1344-75 VESA */
405 { NULL, 75, 1792, 1344, 3831, 352, 96, 69, 1, 216, 3,
406 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
407 /* 30 1856x1392-60 VESA */
408 { NULL, 60, 1856, 1392, 4580, 352, 96, 43, 1, 224, 3,
409 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
410 /* 31 1856x1392-75 VESA */
411 { NULL, 75, 1856, 1392, 3472, 352, 128, 104, 1, 224, 3,
412 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
413 /* 32 1920x1440-60 VESA */
414 { NULL, 60, 1920, 1440, 4273, 344, 128, 56, 1, 200, 3,
415 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
416 /* 33 1920x1440-75 VESA */
417 { NULL, 75, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3,
418 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
419 /* 34 1920x1200-60 RB VESA */
420 { NULL, 60, 1920, 1200, 6493, 80, 48, 26, 3, 32, 6,
421 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
422 /* 35 1920x1200-60 VESA */
423 { NULL, 60, 1920, 1200, 5174, 336, 136, 36, 3, 200, 6,
424 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
425 /* 36 1920x1200-75 VESA */
426 { NULL, 75, 1920, 1200, 4077, 344, 136, 46, 3, 208, 6,
427 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
428 /* 37 1920x1200-85 VESA */
429 { NULL, 85, 1920, 1200, 3555, 352, 144, 53, 3, 208, 6,
430 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
431 /* 38 2560x1600-60 RB VESA */
432 { NULL, 60, 2560, 1600, 3724, 80, 48, 37, 3, 32, 6,
433 FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
434 /* 39 2560x1600-60 VESA */
435 { NULL, 60, 2560, 1600, 2869, 472, 192, 49, 3, 280, 6,
436 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
437 /* 40 2560x1600-75 VESA */
438 { NULL, 75, 2560, 1600, 2256, 488, 208, 63, 3, 280, 6,
439 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
440 /* 41 2560x1600-85 VESA */
441 { NULL, 85, 2560, 1600, 1979, 488, 208, 73, 3, 280, 6,
442 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
443 /* 42 2560x1600-120 RB VESA */
444 { NULL, 120, 2560, 1600, 1809, 80, 48, 85, 3, 32, 6,
445 FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
446 };
447 EXPORT_SYMBOL(vesa_modes);
448
449 const struct dmt_videomode dmt_modes[DMT_SIZE] = {
450 { 0x01, 0x0000, 0x000000, &vesa_modes[0] },
451 { 0x02, 0x3119, 0x000000, &vesa_modes[1] },
452 { 0x03, 0x0000, 0x000000, &vesa_modes[2] },
453 { 0x04, 0x3140, 0x000000, &vesa_modes[3] },
454 { 0x05, 0x314c, 0x000000, &vesa_modes[4] },
455 { 0x06, 0x314f, 0x000000, &vesa_modes[5] },
456 { 0x07, 0x3159, 0x000000, &vesa_modes[6] },
457 { 0x08, 0x0000, 0x000000, &vesa_modes[7] },
458 { 0x09, 0x4540, 0x000000, &vesa_modes[8] },
459 { 0x0a, 0x454c, 0x000000, &vesa_modes[9] },
460 { 0x0b, 0x454f, 0x000000, &vesa_modes[10] },
461 { 0x0c, 0x4559, 0x000000, &vesa_modes[11] },
462 { 0x0d, 0x0000, 0x000000, NULL },
463 { 0x0e, 0x0000, 0x000000, NULL },
464 { 0x0f, 0x0000, 0x000000, &vesa_modes[12] },
465 { 0x10, 0x6140, 0x000000, &vesa_modes[13] },
466 { 0x11, 0x614a, 0x000000, &vesa_modes[14] },
467 { 0x12, 0x614f, 0x000000, &vesa_modes[15] },
468 { 0x13, 0x6159, 0x000000, &vesa_modes[16] },
469 { 0x14, 0x0000, 0x000000, NULL },
470 { 0x15, 0x714f, 0x000000, &vesa_modes[17] },
471 { 0x16, 0x0000, 0x7f1c21, NULL },
472 { 0x17, 0x0000, 0x7f1c28, NULL },
473 { 0x18, 0x0000, 0x7f1c44, NULL },
474 { 0x19, 0x0000, 0x7f1c62, NULL },
475 { 0x1a, 0x0000, 0x000000, NULL },
476 { 0x1b, 0x0000, 0x8f1821, NULL },
477 { 0x1c, 0x8100, 0x8f1828, NULL },
478 { 0x1d, 0x810f, 0x8f1844, NULL },
479 { 0x1e, 0x8119, 0x8f1862, NULL },
480 { 0x1f, 0x0000, 0x000000, NULL },
481 { 0x20, 0x8140, 0x000000, &vesa_modes[18] },
482 { 0x21, 0x8159, 0x000000, &vesa_modes[19] },
483 { 0x22, 0x0000, 0x000000, NULL },
484 { 0x23, 0x8180, 0x000000, &vesa_modes[20] },
485 { 0x24, 0x818f, 0x000000, &vesa_modes[21] },
486 { 0x25, 0x8199, 0x000000, &vesa_modes[22] },
487 { 0x26, 0x0000, 0x000000, NULL },
488 { 0x27, 0x0000, 0x000000, NULL },
489 { 0x28, 0x0000, 0x000000, NULL },
490 { 0x29, 0x0000, 0x0c2021, NULL },
491 { 0x2a, 0x9040, 0x0c2028, NULL },
492 { 0x2b, 0x904f, 0x0c2044, NULL },
493 { 0x2c, 0x9059, 0x0c2062, NULL },
494 { 0x2d, 0x0000, 0x000000, NULL },
495 { 0x2e, 0x9500, 0xc11821, NULL },
496 { 0x2f, 0x9500, 0xc11828, NULL },
497 { 0x30, 0x950f, 0xc11844, NULL },
498 { 0x31, 0x9519, 0xc11868, NULL },
499 { 0x32, 0x0000, 0x000000, NULL },
500 { 0x33, 0xa940, 0x000000, &vesa_modes[23] },
501 { 0x34, 0xa945, 0x000000, &vesa_modes[24] },
502 { 0x35, 0xa94a, 0x000000, &vesa_modes[25] },
503 { 0x36, 0xa94f, 0x000000, &vesa_modes[26] },
504 { 0x37, 0xa959, 0x000000, &vesa_modes[27] },
505 { 0x38, 0x0000, 0x000000, NULL },
506 { 0x39, 0x0000, 0x0c2821, NULL },
507 { 0x3a, 0xb300, 0x0c2828, NULL },
508 { 0x3b, 0xb30f, 0x0c2844, NULL },
509 { 0x3c, 0xb319, 0x0c2868, NULL },
510 { 0x3d, 0x0000, 0x000000, NULL },
511 { 0x3e, 0xc140, 0x000000, &vesa_modes[28] },
512 { 0x3f, 0xc14f, 0x000000, &vesa_modes[29] },
513 { 0x40, 0x0000, 0x000000, NULL},
514 { 0x41, 0xc940, 0x000000, &vesa_modes[30] },
515 { 0x42, 0xc94f, 0x000000, &vesa_modes[31] },
516 { 0x43, 0x0000, 0x000000, NULL },
517 { 0x44, 0x0000, 0x572821, &vesa_modes[34] },
518 { 0x45, 0xd100, 0x572828, &vesa_modes[35] },
519 { 0x46, 0xd10f, 0x572844, &vesa_modes[36] },
520 { 0x47, 0xd119, 0x572862, &vesa_modes[37] },
521 { 0x48, 0x0000, 0x000000, NULL },
522 { 0x49, 0xd140, 0x000000, &vesa_modes[32] },
523 { 0x4a, 0xd14f, 0x000000, &vesa_modes[33] },
524 { 0x4b, 0x0000, 0x000000, NULL },
525 { 0x4c, 0x0000, 0x1f3821, &vesa_modes[38] },
526 { 0x4d, 0x0000, 0x1f3828, &vesa_modes[39] },
527 { 0x4e, 0x0000, 0x1f3844, &vesa_modes[40] },
528 { 0x4f, 0x0000, 0x1f3862, &vesa_modes[41] },
529 { 0x50, 0x0000, 0x000000, &vesa_modes[42] },
530 };
531 EXPORT_SYMBOL(dmt_modes);
532 #endif /* CONFIG_FB_MODE_HELPERS */
533
534 /**
535 * fb_try_mode - test a video mode
536 * @var: frame buffer user defined part of display
537 * @info: frame buffer info structure
538 * @mode: frame buffer video mode structure
539 * @bpp: color depth in bits per pixel
540 *
541 * Tries a video mode to test it's validity for device @info.
542 *
543 * Returns 1 on success.
544 *
545 */
546
fb_try_mode(struct fb_var_screeninfo * var,struct fb_info * info,const struct fb_videomode * mode,unsigned int bpp)547 static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
548 const struct fb_videomode *mode, unsigned int bpp)
549 {
550 int err = 0;
551
552 DPRINTK("Trying mode %s %dx%d-%d@%d\n",
553 mode->name ? mode->name : "noname",
554 mode->xres, mode->yres, bpp, mode->refresh);
555 var->xres = mode->xres;
556 var->yres = mode->yres;
557 var->xres_virtual = mode->xres;
558 var->yres_virtual = mode->yres;
559 var->xoffset = 0;
560 var->yoffset = 0;
561 var->bits_per_pixel = bpp;
562 var->activate |= FB_ACTIVATE_TEST;
563 var->pixclock = mode->pixclock;
564 var->left_margin = mode->left_margin;
565 var->right_margin = mode->right_margin;
566 var->upper_margin = mode->upper_margin;
567 var->lower_margin = mode->lower_margin;
568 var->hsync_len = mode->hsync_len;
569 var->vsync_len = mode->vsync_len;
570 var->sync = mode->sync;
571 var->vmode = mode->vmode;
572 if (info->fbops->fb_check_var)
573 err = info->fbops->fb_check_var(var, info);
574 var->activate &= ~FB_ACTIVATE_TEST;
575 return err;
576 }
577
578 /**
579 * fb_find_mode - finds a valid video mode
580 * @var: frame buffer user defined part of display
581 * @info: frame buffer info structure
582 * @mode_option: string video mode to find
583 * @db: video mode database
584 * @dbsize: size of @db
585 * @default_mode: default video mode to fall back to
586 * @default_bpp: default color depth in bits per pixel
587 *
588 * Finds a suitable video mode, starting with the specified mode
589 * in @mode_option with fallback to @default_mode. If
590 * @default_mode fails, all modes in the video mode database will
591 * be tried.
592 *
593 * Valid mode specifiers for @mode_option::
594 *
595 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][p][m]
596 *
597 * or ::
598 *
599 * <name>[-<bpp>][@<refresh>]
600 *
601 * with <xres>, <yres>, <bpp> and <refresh> decimal numbers and
602 * <name> a string.
603 *
604 * If 'M' is present after yres (and before refresh/bpp if present),
605 * the function will compute the timings using VESA(tm) Coordinated
606 * Video Timings (CVT). If 'R' is present after 'M', will compute with
607 * reduced blanking (for flatpanels). If 'i' or 'p' are present, compute
608 * interlaced or progressive mode. If 'm' is present, add margins equal
609 * to 1.8% of xres rounded down to 8 pixels, and 1.8% of yres. The char
610 * 'i', 'p' and 'm' must be after 'M' and 'R'. Example::
611 *
612 * 1024x768MR-8@60m - Reduced blank with margins at 60Hz.
613 *
614 * NOTE: The passed struct @var is _not_ cleared! This allows you
615 * to supply values for e.g. the grayscale and accel_flags fields.
616 *
617 * Returns zero for failure, 1 if using specified @mode_option,
618 * 2 if using specified @mode_option with an ignored refresh rate,
619 * 3 if default mode is used, 4 if fall back to any valid mode.
620 */
621
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)622 int fb_find_mode(struct fb_var_screeninfo *var,
623 struct fb_info *info, const char *mode_option,
624 const struct fb_videomode *db, unsigned int dbsize,
625 const struct fb_videomode *default_mode,
626 unsigned int default_bpp)
627 {
628 char *mode_option_buf = NULL;
629 int i;
630
631 /* Set up defaults */
632 if (!db) {
633 db = modedb;
634 dbsize = ARRAY_SIZE(modedb);
635 }
636
637 if (!default_mode)
638 default_mode = &db[0];
639
640 if (!default_bpp)
641 default_bpp = 8;
642
643 /* Did the user specify a video mode? */
644 if (!mode_option) {
645 fb_get_options(NULL, &mode_option_buf);
646 mode_option = mode_option_buf;
647 }
648 if (mode_option) {
649 const char *name = mode_option;
650 unsigned int namelen = strlen(name);
651 int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
652 unsigned int xres = 0, yres = 0, bpp = default_bpp, refresh = 0;
653 int yres_specified = 0, cvt = 0, rb = 0;
654 int interlace_specified = 0, interlace = 0;
655 int margins = 0;
656 u32 best, diff, tdiff;
657
658 for (i = namelen-1; i >= 0; i--) {
659 switch (name[i]) {
660 case '@':
661 namelen = i;
662 if (!refresh_specified && !bpp_specified &&
663 !yres_specified) {
664 refresh = simple_strtol(&name[i+1], NULL,
665 10);
666 refresh_specified = 1;
667 if (cvt || rb)
668 cvt = 0;
669 } else
670 goto done;
671 break;
672 case '-':
673 namelen = i;
674 if (!bpp_specified && !yres_specified) {
675 bpp = simple_strtol(&name[i+1], NULL,
676 10);
677 bpp_specified = 1;
678 if (cvt || rb)
679 cvt = 0;
680 } else
681 goto done;
682 break;
683 case 'x':
684 if (!yres_specified) {
685 yres = simple_strtol(&name[i+1], NULL,
686 10);
687 yres_specified = 1;
688 } else
689 goto done;
690 break;
691 case '0' ... '9':
692 break;
693 case 'M':
694 if (!yres_specified)
695 cvt = 1;
696 break;
697 case 'R':
698 if (!cvt)
699 rb = 1;
700 break;
701 case 'm':
702 if (!cvt)
703 margins = 1;
704 break;
705 case 'p':
706 if (!cvt) {
707 interlace = 0;
708 interlace_specified = 1;
709 }
710 break;
711 case 'i':
712 if (!cvt) {
713 interlace = 1;
714 interlace_specified = 1;
715 }
716 break;
717 default:
718 goto done;
719 }
720 }
721 if (i < 0 && yres_specified) {
722 xres = simple_strtol(name, NULL, 10);
723 res_specified = 1;
724 }
725 done:
726 kfree(mode_option_buf);
727 if (cvt) {
728 struct fb_videomode cvt_mode;
729 int ret;
730
731 DPRINTK("CVT mode %dx%d@%dHz%s%s%s\n", xres, yres,
732 (refresh) ? refresh : 60,
733 (rb) ? " reduced blanking" : "",
734 (margins) ? " with margins" : "",
735 (interlace) ? " interlaced" : "");
736
737 memset(&cvt_mode, 0, sizeof(cvt_mode));
738 cvt_mode.xres = xres;
739 cvt_mode.yres = yres;
740 cvt_mode.refresh = (refresh) ? refresh : 60;
741
742 if (interlace)
743 cvt_mode.vmode |= FB_VMODE_INTERLACED;
744 else
745 cvt_mode.vmode &= ~FB_VMODE_INTERLACED;
746
747 ret = fb_find_mode_cvt(&cvt_mode, margins, rb);
748
749 if (!ret && !fb_try_mode(var, info, &cvt_mode, bpp)) {
750 DPRINTK("modedb CVT: CVT mode ok\n");
751 return 1;
752 }
753
754 DPRINTK("CVT mode invalid, getting mode from database\n");
755 }
756
757 DPRINTK("Trying specified video mode%s %ix%i\n",
758 refresh_specified ? "" : " (ignoring refresh rate)",
759 xres, yres);
760
761 if (!refresh_specified) {
762 /*
763 * If the caller has provided a custom mode database and
764 * a valid monspecs structure, we look for the mode with
765 * the highest refresh rate. Otherwise we play it safe
766 * it and try to find a mode with a refresh rate closest
767 * to the standard 60 Hz.
768 */
769 if (db != modedb &&
770 info->monspecs.vfmin && info->monspecs.vfmax &&
771 info->monspecs.hfmin && info->monspecs.hfmax &&
772 info->monspecs.dclkmax) {
773 refresh = 1000;
774 } else {
775 refresh = 60;
776 }
777 }
778
779 diff = -1;
780 best = -1;
781 for (i = 0; i < dbsize; i++) {
782 if ((name_matches(db[i], name, namelen) ||
783 (res_specified && res_matches(db[i], xres, yres))) &&
784 !fb_try_mode(var, info, &db[i], bpp)) {
785 const int db_interlace = (db[i].vmode &
786 FB_VMODE_INTERLACED ? 1 : 0);
787 int score = abs(db[i].refresh - refresh);
788
789 if (interlace_specified)
790 score += abs(db_interlace - interlace);
791
792 if (!interlace_specified ||
793 db_interlace == interlace)
794 if (refresh_specified &&
795 db[i].refresh == refresh)
796 return 1;
797
798 if (score < diff) {
799 diff = score;
800 best = i;
801 }
802 }
803 }
804 if (best != -1) {
805 fb_try_mode(var, info, &db[best], bpp);
806 return (refresh_specified) ? 2 : 1;
807 }
808
809 diff = 2 * (xres + yres);
810 best = -1;
811 DPRINTK("Trying best-fit modes\n");
812 for (i = 0; i < dbsize; i++) {
813 DPRINTK("Trying %ix%i\n", db[i].xres, db[i].yres);
814 if (!fb_try_mode(var, info, &db[i], bpp)) {
815 tdiff = abs(db[i].xres - xres) +
816 abs(db[i].yres - yres);
817
818 /*
819 * Penalize modes with resolutions smaller
820 * than requested.
821 */
822 if (xres > db[i].xres || yres > db[i].yres)
823 tdiff += xres + yres;
824
825 if (diff > tdiff) {
826 diff = tdiff;
827 best = i;
828 }
829 }
830 }
831 if (best != -1) {
832 fb_try_mode(var, info, &db[best], bpp);
833 return 5;
834 }
835 }
836
837 DPRINTK("Trying default video mode\n");
838 if (!fb_try_mode(var, info, default_mode, default_bpp))
839 return 3;
840
841 DPRINTK("Trying all modes\n");
842 for (i = 0; i < dbsize; i++)
843 if (!fb_try_mode(var, info, &db[i], default_bpp))
844 return 4;
845
846 DPRINTK("No valid mode found\n");
847 return 0;
848 }
849
850 /**
851 * fb_var_to_videomode - convert fb_var_screeninfo to fb_videomode
852 * @mode: pointer to struct fb_videomode
853 * @var: pointer to struct fb_var_screeninfo
854 */
fb_var_to_videomode(struct fb_videomode * mode,const struct fb_var_screeninfo * var)855 void fb_var_to_videomode(struct fb_videomode *mode,
856 const struct fb_var_screeninfo *var)
857 {
858 u32 pixclock, hfreq, htotal, vtotal;
859
860 mode->name = NULL;
861 mode->xres = var->xres;
862 mode->yres = var->yres;
863 mode->pixclock = var->pixclock;
864 mode->hsync_len = var->hsync_len;
865 mode->vsync_len = var->vsync_len;
866 mode->left_margin = var->left_margin;
867 mode->right_margin = var->right_margin;
868 mode->upper_margin = var->upper_margin;
869 mode->lower_margin = var->lower_margin;
870 mode->sync = var->sync;
871 mode->vmode = var->vmode & FB_VMODE_MASK;
872 mode->flag = FB_MODE_IS_FROM_VAR;
873 mode->refresh = 0;
874
875 if (!var->pixclock)
876 return;
877
878 pixclock = PICOS2KHZ(var->pixclock) * 1000;
879
880 htotal = var->xres + var->right_margin + var->hsync_len +
881 var->left_margin;
882 vtotal = var->yres + var->lower_margin + var->vsync_len +
883 var->upper_margin;
884
885 if (var->vmode & FB_VMODE_INTERLACED)
886 vtotal /= 2;
887 if (var->vmode & FB_VMODE_DOUBLE)
888 vtotal *= 2;
889
890 if (!htotal || !vtotal)
891 return;
892
893 hfreq = pixclock/htotal;
894 mode->refresh = hfreq/vtotal;
895 }
896
897 /**
898 * fb_videomode_to_var - convert fb_videomode to fb_var_screeninfo
899 * @var: pointer to struct fb_var_screeninfo
900 * @mode: pointer to struct fb_videomode
901 */
fb_videomode_to_var(struct fb_var_screeninfo * var,const struct fb_videomode * mode)902 void fb_videomode_to_var(struct fb_var_screeninfo *var,
903 const struct fb_videomode *mode)
904 {
905 var->xres = mode->xres;
906 var->yres = mode->yres;
907 var->xres_virtual = mode->xres;
908 var->yres_virtual = mode->yres;
909 var->xoffset = 0;
910 var->yoffset = 0;
911 var->pixclock = mode->pixclock;
912 var->left_margin = mode->left_margin;
913 var->right_margin = mode->right_margin;
914 var->upper_margin = mode->upper_margin;
915 var->lower_margin = mode->lower_margin;
916 var->hsync_len = mode->hsync_len;
917 var->vsync_len = mode->vsync_len;
918 var->sync = mode->sync;
919 var->vmode = mode->vmode & FB_VMODE_MASK;
920 }
921
922 /**
923 * fb_mode_is_equal - compare 2 videomodes
924 * @mode1: first videomode
925 * @mode2: second videomode
926 *
927 * RETURNS:
928 * 1 if equal, 0 if not
929 */
fb_mode_is_equal(const struct fb_videomode * mode1,const struct fb_videomode * mode2)930 int fb_mode_is_equal(const struct fb_videomode *mode1,
931 const struct fb_videomode *mode2)
932 {
933 return (mode1->xres == mode2->xres &&
934 mode1->yres == mode2->yres &&
935 mode1->pixclock == mode2->pixclock &&
936 mode1->hsync_len == mode2->hsync_len &&
937 mode1->vsync_len == mode2->vsync_len &&
938 mode1->left_margin == mode2->left_margin &&
939 mode1->right_margin == mode2->right_margin &&
940 mode1->upper_margin == mode2->upper_margin &&
941 mode1->lower_margin == mode2->lower_margin &&
942 mode1->sync == mode2->sync &&
943 mode1->vmode == mode2->vmode);
944 }
945
946 /**
947 * fb_find_best_mode - find best matching videomode
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 *
954 * IMPORTANT:
955 * This function assumes that all modelist entries in
956 * info->modelist are valid.
957 *
958 * NOTES:
959 * Finds best matching videomode which has an equal or greater dimension than
960 * var->xres and var->yres. If more than 1 videomode is found, will return
961 * the videomode with the highest refresh rate
962 */
fb_find_best_mode(const struct fb_var_screeninfo * var,struct list_head * head)963 const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
964 struct list_head *head)
965 {
966 struct fb_modelist *modelist;
967 struct fb_videomode *mode, *best = NULL;
968 u32 diff = -1;
969
970 list_for_each_entry(modelist, head, list) {
971 u32 d;
972 mode = &modelist->mode;
973
974 if (mode->xres >= var->xres && mode->yres >= var->yres) {
975 d = (mode->xres - var->xres) +
976 (mode->yres - var->yres);
977 if (diff > d) {
978 diff = d;
979 best = mode;
980 } else if (diff == d && best &&
981 mode->refresh > best->refresh)
982 best = mode;
983 }
984 }
985 return best;
986 }
987
988 /**
989 * fb_find_nearest_mode - find closest videomode
990 *
991 * @mode: pointer to struct fb_videomode
992 * @head: pointer to modelist
993 *
994 * Finds best matching videomode, smaller or greater in dimension.
995 * If more than 1 videomode is found, will return the videomode with
996 * the closest refresh rate.
997 */
fb_find_nearest_mode(const struct fb_videomode * mode,struct list_head * head)998 const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
999 struct list_head *head)
1000 {
1001 struct fb_modelist *modelist;
1002 struct fb_videomode *cmode, *best = NULL;
1003 u32 diff = -1, diff_refresh = -1;
1004
1005 list_for_each_entry(modelist, head, list) {
1006 u32 d;
1007 cmode = &modelist->mode;
1008
1009 d = abs(cmode->xres - mode->xres) +
1010 abs(cmode->yres - mode->yres);
1011 if (diff > d) {
1012 diff = d;
1013 diff_refresh = abs(cmode->refresh - mode->refresh);
1014 best = cmode;
1015 } else if (diff == d) {
1016 d = abs(cmode->refresh - mode->refresh);
1017 if (diff_refresh > d) {
1018 diff_refresh = d;
1019 best = cmode;
1020 }
1021 }
1022 }
1023
1024 return best;
1025 }
1026
1027 /**
1028 * fb_match_mode - find a videomode which exactly matches the timings in var
1029 * @var: pointer to struct fb_var_screeninfo
1030 * @head: pointer to struct list_head of modelist
1031 *
1032 * RETURNS:
1033 * struct fb_videomode, NULL if none found
1034 */
fb_match_mode(const struct fb_var_screeninfo * var,struct list_head * head)1035 const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
1036 struct list_head *head)
1037 {
1038 struct fb_modelist *modelist;
1039 struct fb_videomode *m, mode;
1040
1041 fb_var_to_videomode(&mode, var);
1042 list_for_each_entry(modelist, head, list) {
1043 m = &modelist->mode;
1044 if (fb_mode_is_equal(m, &mode))
1045 return m;
1046 }
1047 return NULL;
1048 }
1049
1050 /**
1051 * fb_add_videomode - adds videomode entry to modelist
1052 * @mode: videomode to add
1053 * @head: struct list_head of modelist
1054 *
1055 * NOTES:
1056 * Will only add unmatched mode entries
1057 */
fb_add_videomode(const struct fb_videomode * mode,struct list_head * head)1058 int fb_add_videomode(const struct fb_videomode *mode, struct list_head *head)
1059 {
1060 struct fb_modelist *modelist;
1061 struct fb_videomode *m;
1062 int found = 0;
1063
1064 list_for_each_entry(modelist, head, list) {
1065 m = &modelist->mode;
1066 if (fb_mode_is_equal(m, mode)) {
1067 found = 1;
1068 break;
1069 }
1070 }
1071 if (!found) {
1072 modelist = kmalloc(sizeof(struct fb_modelist),
1073 GFP_KERNEL);
1074
1075 if (!modelist)
1076 return -ENOMEM;
1077 modelist->mode = *mode;
1078 list_add(&modelist->list, head);
1079 }
1080 return 0;
1081 }
1082
1083 /**
1084 * fb_delete_videomode - removed videomode entry from modelist
1085 * @mode: videomode to remove
1086 * @head: struct list_head of modelist
1087 *
1088 * NOTES:
1089 * Will remove all matching mode entries
1090 */
fb_delete_videomode(const struct fb_videomode * mode,struct list_head * head)1091 void fb_delete_videomode(const struct fb_videomode *mode,
1092 struct list_head *head)
1093 {
1094 struct list_head *pos, *n;
1095 struct fb_modelist *modelist;
1096 struct fb_videomode *m;
1097
1098 list_for_each_safe(pos, n, head) {
1099 modelist = list_entry(pos, struct fb_modelist, list);
1100 m = &modelist->mode;
1101 if (fb_mode_is_equal(m, mode)) {
1102 list_del(pos);
1103 kfree(pos);
1104 }
1105 }
1106 }
1107
1108 /**
1109 * fb_destroy_modelist - destroy modelist
1110 * @head: struct list_head of modelist
1111 */
fb_destroy_modelist(struct list_head * head)1112 void fb_destroy_modelist(struct list_head *head)
1113 {
1114 struct list_head *pos, *n;
1115
1116 list_for_each_safe(pos, n, head) {
1117 list_del(pos);
1118 kfree(pos);
1119 }
1120 }
1121 EXPORT_SYMBOL_GPL(fb_destroy_modelist);
1122
1123 /**
1124 * fb_videomode_to_modelist - convert mode array to mode list
1125 * @modedb: array of struct fb_videomode
1126 * @num: number of entries in array
1127 * @head: struct list_head of modelist
1128 */
fb_videomode_to_modelist(const struct fb_videomode * modedb,int num,struct list_head * head)1129 void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
1130 struct list_head *head)
1131 {
1132 int i;
1133
1134 INIT_LIST_HEAD(head);
1135
1136 for (i = 0; i < num; i++) {
1137 if (fb_add_videomode(&modedb[i], head))
1138 return;
1139 }
1140 }
1141
fb_find_best_display(const struct fb_monspecs * specs,struct list_head * head)1142 const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
1143 struct list_head *head)
1144 {
1145 struct fb_modelist *modelist;
1146 const struct fb_videomode *m, *m1 = NULL, *md = NULL, *best = NULL;
1147 int first = 0;
1148
1149 if (!head->prev || !head->next || list_empty(head))
1150 goto finished;
1151
1152 /* get the first detailed mode and the very first mode */
1153 list_for_each_entry(modelist, head, list) {
1154 m = &modelist->mode;
1155
1156 if (!first) {
1157 m1 = m;
1158 first = 1;
1159 }
1160
1161 if (m->flag & FB_MODE_IS_FIRST) {
1162 md = m;
1163 break;
1164 }
1165 }
1166
1167 /* first detailed timing is preferred */
1168 if (specs->misc & FB_MISC_1ST_DETAIL) {
1169 best = md;
1170 goto finished;
1171 }
1172
1173 /* find best mode based on display width and height */
1174 if (specs->max_x && specs->max_y) {
1175 struct fb_var_screeninfo var;
1176
1177 memset(&var, 0, sizeof(struct fb_var_screeninfo));
1178 var.xres = (specs->max_x * 7200)/254;
1179 var.yres = (specs->max_y * 7200)/254;
1180 m = fb_find_best_mode(&var, head);
1181 if (m) {
1182 best = m;
1183 goto finished;
1184 }
1185 }
1186
1187 /* use first detailed mode */
1188 if (md) {
1189 best = md;
1190 goto finished;
1191 }
1192
1193 /* last resort, use the very first mode */
1194 best = m1;
1195 finished:
1196 return best;
1197 }
1198 EXPORT_SYMBOL(fb_find_best_display);
1199
1200 EXPORT_SYMBOL(fb_videomode_to_var);
1201 EXPORT_SYMBOL(fb_var_to_videomode);
1202 EXPORT_SYMBOL(fb_mode_is_equal);
1203 EXPORT_SYMBOL(fb_add_videomode);
1204 EXPORT_SYMBOL(fb_match_mode);
1205 EXPORT_SYMBOL(fb_find_best_mode);
1206 EXPORT_SYMBOL(fb_find_nearest_mode);
1207 EXPORT_SYMBOL(fb_videomode_to_modelist);
1208 EXPORT_SYMBOL(fb_find_mode);
1209 EXPORT_SYMBOL(fb_find_mode_cvt);
1210