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[65] = {
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 /* 34 1920x1200-60 RB VESA */
472 { NULL, 60, 1920, 1200, 6493, 80, 48, 26, 3, 32, 6,
473 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
474 /* 35 1920x1200-60 VESA */
475 { NULL, 60, 1920, 1200, 5174, 336, 136, 36, 3, 200, 6,
476 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
477 /* 36 1920x1200-75 VESA */
478 { NULL, 75, 1920, 1200, 4077, 344, 136, 46, 3, 208, 6,
479 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
480 /* 37 1920x1200-85 VESA */
481 { NULL, 85, 1920, 1200, 3555, 352, 144, 53, 3, 208, 6,
482 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
483 /* 38 2560x1600-60 RB VESA */
484 { NULL, 60, 2560, 1600, 3724, 80, 48, 37, 3, 32, 6,
485 FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
486 /* 39 2560x1600-60 VESA */
487 { NULL, 60, 2560, 1600, 2869, 472, 192, 49, 3, 280, 6,
488 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
489 /* 40 2560x1600-75 VESA */
490 { NULL, 75, 2560, 1600, 2256, 488, 208, 63, 3, 280, 6,
491 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
492 /* 41 2560x1600-85 VESA */
493 { NULL, 85, 2560, 1600, 1979, 488, 208, 73, 3, 280, 6,
494 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
495 /* 42 2560x1600-120 RB VESA */
496 { NULL, 120, 2560, 1600, 1809, 80, 48, 85, 3, 32, 6,
497 FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
498 };
499 EXPORT_SYMBOL(vesa_modes);
500
501 const struct dmt_videomode dmt_modes[DMT_SIZE] = {
502 { 0x01, 0x0000, 0x000000, &vesa_modes[0] },
503 { 0x02, 0x3119, 0x000000, &vesa_modes[1] },
504 { 0x03, 0x0000, 0x000000, &vesa_modes[2] },
505 { 0x04, 0x3140, 0x000000, &vesa_modes[3] },
506 { 0x05, 0x314c, 0x000000, &vesa_modes[4] },
507 { 0x06, 0x314f, 0x000000, &vesa_modes[5] },
508 { 0x07, 0x3159, 0x000000, &vesa_modes[6] },
509 { 0x08, 0x0000, 0x000000, &vesa_modes[7] },
510 { 0x09, 0x4540, 0x000000, &vesa_modes[8] },
511 { 0x0a, 0x454c, 0x000000, &vesa_modes[9] },
512 { 0x0b, 0x454f, 0x000000, &vesa_modes[10] },
513 { 0x0c, 0x4559, 0x000000, &vesa_modes[11] },
514 { 0x0d, 0x0000, 0x000000, NULL },
515 { 0x0e, 0x0000, 0x000000, NULL },
516 { 0x0f, 0x0000, 0x000000, &vesa_modes[12] },
517 { 0x10, 0x6140, 0x000000, &vesa_modes[13] },
518 { 0x11, 0x614a, 0x000000, &vesa_modes[14] },
519 { 0x12, 0x614f, 0x000000, &vesa_modes[15] },
520 { 0x13, 0x6159, 0x000000, &vesa_modes[16] },
521 { 0x14, 0x0000, 0x000000, NULL },
522 { 0x15, 0x714f, 0x000000, &vesa_modes[17] },
523 { 0x16, 0x0000, 0x7f1c21, NULL },
524 { 0x17, 0x0000, 0x7f1c28, NULL },
525 { 0x18, 0x0000, 0x7f1c44, NULL },
526 { 0x19, 0x0000, 0x7f1c62, NULL },
527 { 0x1a, 0x0000, 0x000000, NULL },
528 { 0x1b, 0x0000, 0x8f1821, NULL },
529 { 0x1c, 0x8100, 0x8f1828, NULL },
530 { 0x1d, 0x810f, 0x8f1844, NULL },
531 { 0x1e, 0x8119, 0x8f1862, NULL },
532 { 0x1f, 0x0000, 0x000000, NULL },
533 { 0x20, 0x8140, 0x000000, &vesa_modes[18] },
534 { 0x21, 0x8159, 0x000000, &vesa_modes[19] },
535 { 0x22, 0x0000, 0x000000, NULL },
536 { 0x23, 0x8180, 0x000000, &vesa_modes[20] },
537 { 0x24, 0x818f, 0x000000, &vesa_modes[21] },
538 { 0x25, 0x8199, 0x000000, &vesa_modes[22] },
539 { 0x26, 0x0000, 0x000000, NULL },
540 { 0x27, 0x0000, 0x000000, NULL },
541 { 0x28, 0x0000, 0x000000, NULL },
542 { 0x29, 0x0000, 0x0c2021, NULL },
543 { 0x2a, 0x9040, 0x0c2028, NULL },
544 { 0x2b, 0x904f, 0x0c2044, NULL },
545 { 0x2c, 0x9059, 0x0c2062, NULL },
546 { 0x2d, 0x0000, 0x000000, NULL },
547 { 0x2e, 0x9500, 0xc11821, NULL },
548 { 0x2f, 0x9500, 0xc11828, NULL },
549 { 0x30, 0x950f, 0xc11844, NULL },
550 { 0x31, 0x9519, 0xc11868, NULL },
551 { 0x32, 0x0000, 0x000000, NULL },
552 { 0x33, 0xa940, 0x000000, &vesa_modes[23] },
553 { 0x34, 0xa945, 0x000000, &vesa_modes[24] },
554 { 0x35, 0xa94a, 0x000000, &vesa_modes[25] },
555 { 0x36, 0xa94f, 0x000000, &vesa_modes[26] },
556 { 0x37, 0xa959, 0x000000, &vesa_modes[27] },
557 { 0x38, 0x0000, 0x000000, NULL },
558 { 0x39, 0x0000, 0x0c2821, NULL },
559 { 0x3a, 0xb300, 0x0c2828, NULL },
560 { 0x3b, 0xb30f, 0x0c2844, NULL },
561 { 0x3c, 0xb319, 0x0c2868, NULL },
562 { 0x3d, 0x0000, 0x000000, NULL },
563 { 0x3e, 0xc140, 0x000000, &vesa_modes[28] },
564 { 0x3f, 0xc14f, 0x000000, &vesa_modes[29] },
565 { 0x40, 0x0000, 0x000000, NULL},
566 { 0x41, 0xc940, 0x000000, &vesa_modes[30] },
567 { 0x42, 0xc94f, 0x000000, &vesa_modes[31] },
568 { 0x43, 0x0000, 0x000000, NULL },
569 { 0x44, 0x0000, 0x572821, &vesa_modes[34] },
570 { 0x45, 0xd100, 0x572828, &vesa_modes[35] },
571 { 0x46, 0xd10f, 0x572844, &vesa_modes[36] },
572 { 0x47, 0xd119, 0x572862, &vesa_modes[37] },
573 { 0x48, 0x0000, 0x000000, NULL },
574 { 0x49, 0xd140, 0x000000, &vesa_modes[32] },
575 { 0x4a, 0xd14f, 0x000000, &vesa_modes[33] },
576 { 0x4b, 0x0000, 0x000000, NULL },
577 { 0x4c, 0x0000, 0x1f3821, &vesa_modes[38] },
578 { 0x4d, 0x0000, 0x1f3828, &vesa_modes[39] },
579 { 0x4e, 0x0000, 0x1f3844, &vesa_modes[40] },
580 { 0x4f, 0x0000, 0x1f3862, &vesa_modes[41] },
581 { 0x50, 0x0000, 0x000000, &vesa_modes[42] },
582 };
583 EXPORT_SYMBOL(dmt_modes);
584 #endif /* CONFIG_FB_MODE_HELPERS */
585
586 /**
587 * fb_try_mode - test a video mode
588 * @var: frame buffer user defined part of display
589 * @info: frame buffer info structure
590 * @mode: frame buffer video mode structure
591 * @bpp: color depth in bits per pixel
592 *
593 * Tries a video mode to test it's validity for device @info.
594 *
595 * Returns 1 on success.
596 *
597 */
598
fb_try_mode(struct fb_var_screeninfo * var,struct fb_info * info,const struct fb_videomode * mode,unsigned int bpp)599 static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
600 const struct fb_videomode *mode, unsigned int bpp)
601 {
602 int err = 0;
603
604 DPRINTK("Trying mode %s %dx%d-%d@%d\n",
605 mode->name ? mode->name : "noname",
606 mode->xres, mode->yres, bpp, mode->refresh);
607 var->xres = mode->xres;
608 var->yres = mode->yres;
609 var->xres_virtual = mode->xres;
610 var->yres_virtual = mode->yres;
611 var->xoffset = 0;
612 var->yoffset = 0;
613 var->bits_per_pixel = bpp;
614 var->activate |= FB_ACTIVATE_TEST;
615 var->pixclock = mode->pixclock;
616 var->left_margin = mode->left_margin;
617 var->right_margin = mode->right_margin;
618 var->upper_margin = mode->upper_margin;
619 var->lower_margin = mode->lower_margin;
620 var->hsync_len = mode->hsync_len;
621 var->vsync_len = mode->vsync_len;
622 var->sync = mode->sync;
623 var->vmode = mode->vmode;
624 if (info->fbops->fb_check_var)
625 err = info->fbops->fb_check_var(var, info);
626 var->activate &= ~FB_ACTIVATE_TEST;
627 return err;
628 }
629
630 /**
631 * fb_find_mode - finds a valid video mode
632 * @var: frame buffer user defined part of display
633 * @info: frame buffer info structure
634 * @mode_option: string video mode to find
635 * @db: video mode database
636 * @dbsize: size of @db
637 * @default_mode: default video mode to fall back to
638 * @default_bpp: default color depth in bits per pixel
639 *
640 * Finds a suitable video mode, starting with the specified mode
641 * in @mode_option with fallback to @default_mode. If
642 * @default_mode fails, all modes in the video mode database will
643 * be tried.
644 *
645 * Valid mode specifiers for @mode_option::
646 *
647 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][p][m]
648 *
649 * or ::
650 *
651 * <name>[-<bpp>][@<refresh>]
652 *
653 * with <xres>, <yres>, <bpp> and <refresh> decimal numbers and
654 * <name> a string.
655 *
656 * If 'M' is present after yres (and before refresh/bpp if present),
657 * the function will compute the timings using VESA(tm) Coordinated
658 * Video Timings (CVT). If 'R' is present after 'M', will compute with
659 * reduced blanking (for flatpanels). If 'i' or 'p' are present, compute
660 * interlaced or progressive mode. If 'm' is present, add margins equal
661 * to 1.8% of xres rounded down to 8 pixels, and 1.8% of yres. The char
662 * 'i', 'p' and 'm' must be after 'M' and 'R'. Example::
663 *
664 * 1024x768MR-8@60m - Reduced blank with margins at 60Hz.
665 *
666 * NOTE: The passed struct @var is _not_ cleared! This allows you
667 * to supply values for e.g. the grayscale and accel_flags fields.
668 *
669 * Returns zero for failure, 1 if using specified @mode_option,
670 * 2 if using specified @mode_option with an ignored refresh rate,
671 * 3 if default mode is used, 4 if fall back to any valid mode.
672 */
673
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)674 int fb_find_mode(struct fb_var_screeninfo *var,
675 struct fb_info *info, const char *mode_option,
676 const struct fb_videomode *db, unsigned int dbsize,
677 const struct fb_videomode *default_mode,
678 unsigned int default_bpp)
679 {
680 int i;
681
682 /* Set up defaults */
683 if (!db) {
684 db = modedb;
685 dbsize = ARRAY_SIZE(modedb);
686 }
687
688 if (!default_mode)
689 default_mode = &db[0];
690
691 if (!default_bpp)
692 default_bpp = 8;
693
694 /* Did the user specify a video mode? */
695 if (!mode_option)
696 mode_option = fb_mode_option;
697 if (mode_option) {
698 const char *name = mode_option;
699 unsigned int namelen = strlen(name);
700 int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
701 unsigned int xres = 0, yres = 0, bpp = default_bpp, refresh = 0;
702 int yres_specified = 0, cvt = 0, rb = 0;
703 int interlace_specified = 0, interlace = 0;
704 int margins = 0;
705 u32 best, diff, tdiff;
706
707 for (i = namelen-1; i >= 0; i--) {
708 switch (name[i]) {
709 case '@':
710 namelen = i;
711 if (!refresh_specified && !bpp_specified &&
712 !yres_specified) {
713 refresh = simple_strtol(&name[i+1], NULL,
714 10);
715 refresh_specified = 1;
716 if (cvt || rb)
717 cvt = 0;
718 } else
719 goto done;
720 break;
721 case '-':
722 namelen = i;
723 if (!bpp_specified && !yres_specified) {
724 bpp = simple_strtol(&name[i+1], NULL,
725 10);
726 bpp_specified = 1;
727 if (cvt || rb)
728 cvt = 0;
729 } else
730 goto done;
731 break;
732 case 'x':
733 if (!yres_specified) {
734 yres = simple_strtol(&name[i+1], NULL,
735 10);
736 yres_specified = 1;
737 } else
738 goto done;
739 break;
740 case '0' ... '9':
741 break;
742 case 'M':
743 if (!yres_specified)
744 cvt = 1;
745 break;
746 case 'R':
747 if (!cvt)
748 rb = 1;
749 break;
750 case 'm':
751 if (!cvt)
752 margins = 1;
753 break;
754 case 'p':
755 if (!cvt) {
756 interlace = 0;
757 interlace_specified = 1;
758 }
759 break;
760 case 'i':
761 if (!cvt) {
762 interlace = 1;
763 interlace_specified = 1;
764 }
765 break;
766 default:
767 goto done;
768 }
769 }
770 if (i < 0 && yres_specified) {
771 xres = simple_strtol(name, NULL, 10);
772 res_specified = 1;
773 }
774 done:
775 if (cvt) {
776 struct fb_videomode cvt_mode;
777 int ret;
778
779 DPRINTK("CVT mode %dx%d@%dHz%s%s%s\n", xres, yres,
780 (refresh) ? refresh : 60,
781 (rb) ? " reduced blanking" : "",
782 (margins) ? " with margins" : "",
783 (interlace) ? " interlaced" : "");
784
785 memset(&cvt_mode, 0, sizeof(cvt_mode));
786 cvt_mode.xres = xres;
787 cvt_mode.yres = yres;
788 cvt_mode.refresh = (refresh) ? refresh : 60;
789
790 if (interlace)
791 cvt_mode.vmode |= FB_VMODE_INTERLACED;
792 else
793 cvt_mode.vmode &= ~FB_VMODE_INTERLACED;
794
795 ret = fb_find_mode_cvt(&cvt_mode, margins, rb);
796
797 if (!ret && !fb_try_mode(var, info, &cvt_mode, bpp)) {
798 DPRINTK("modedb CVT: CVT mode ok\n");
799 return 1;
800 }
801
802 DPRINTK("CVT mode invalid, getting mode from database\n");
803 }
804
805 DPRINTK("Trying specified video mode%s %ix%i\n",
806 refresh_specified ? "" : " (ignoring refresh rate)",
807 xres, yres);
808
809 if (!refresh_specified) {
810 /*
811 * If the caller has provided a custom mode database and
812 * a valid monspecs structure, we look for the mode with
813 * the highest refresh rate. Otherwise we play it safe
814 * it and try to find a mode with a refresh rate closest
815 * to the standard 60 Hz.
816 */
817 if (db != modedb &&
818 info->monspecs.vfmin && info->monspecs.vfmax &&
819 info->monspecs.hfmin && info->monspecs.hfmax &&
820 info->monspecs.dclkmax) {
821 refresh = 1000;
822 } else {
823 refresh = 60;
824 }
825 }
826
827 diff = -1;
828 best = -1;
829 for (i = 0; i < dbsize; i++) {
830 if ((name_matches(db[i], name, namelen) ||
831 (res_specified && res_matches(db[i], xres, yres))) &&
832 !fb_try_mode(var, info, &db[i], bpp)) {
833 const int db_interlace = (db[i].vmode &
834 FB_VMODE_INTERLACED ? 1 : 0);
835 int score = abs(db[i].refresh - refresh);
836
837 if (interlace_specified)
838 score += abs(db_interlace - interlace);
839
840 if (!interlace_specified ||
841 db_interlace == interlace)
842 if (refresh_specified &&
843 db[i].refresh == refresh)
844 return 1;
845
846 if (score < diff) {
847 diff = score;
848 best = i;
849 }
850 }
851 }
852 if (best != -1) {
853 fb_try_mode(var, info, &db[best], bpp);
854 return (refresh_specified) ? 2 : 1;
855 }
856
857 diff = 2 * (xres + yres);
858 best = -1;
859 DPRINTK("Trying best-fit modes\n");
860 for (i = 0; i < dbsize; i++) {
861 DPRINTK("Trying %ix%i\n", db[i].xres, db[i].yres);
862 if (!fb_try_mode(var, info, &db[i], bpp)) {
863 tdiff = abs(db[i].xres - xres) +
864 abs(db[i].yres - yres);
865
866 /*
867 * Penalize modes with resolutions smaller
868 * than requested.
869 */
870 if (xres > db[i].xres || yres > db[i].yres)
871 tdiff += xres + yres;
872
873 if (diff > tdiff) {
874 diff = tdiff;
875 best = i;
876 }
877 }
878 }
879 if (best != -1) {
880 fb_try_mode(var, info, &db[best], bpp);
881 return 5;
882 }
883 }
884
885 DPRINTK("Trying default video mode\n");
886 if (!fb_try_mode(var, info, default_mode, default_bpp))
887 return 3;
888
889 DPRINTK("Trying all modes\n");
890 for (i = 0; i < dbsize; i++)
891 if (!fb_try_mode(var, info, &db[i], default_bpp))
892 return 4;
893
894 DPRINTK("No valid mode found\n");
895 return 0;
896 }
897
898 /**
899 * fb_var_to_videomode - convert fb_var_screeninfo to fb_videomode
900 * @mode: pointer to struct fb_videomode
901 * @var: pointer to struct fb_var_screeninfo
902 */
fb_var_to_videomode(struct fb_videomode * mode,const struct fb_var_screeninfo * var)903 void fb_var_to_videomode(struct fb_videomode *mode,
904 const struct fb_var_screeninfo *var)
905 {
906 u32 pixclock, hfreq, htotal, vtotal;
907
908 mode->name = NULL;
909 mode->xres = var->xres;
910 mode->yres = var->yres;
911 mode->pixclock = var->pixclock;
912 mode->hsync_len = var->hsync_len;
913 mode->vsync_len = var->vsync_len;
914 mode->left_margin = var->left_margin;
915 mode->right_margin = var->right_margin;
916 mode->upper_margin = var->upper_margin;
917 mode->lower_margin = var->lower_margin;
918 mode->sync = var->sync;
919 mode->vmode = var->vmode & FB_VMODE_MASK;
920 mode->flag = FB_MODE_IS_FROM_VAR;
921 mode->refresh = 0;
922
923 if (!var->pixclock)
924 return;
925
926 pixclock = PICOS2KHZ(var->pixclock) * 1000;
927
928 htotal = var->xres + var->right_margin + var->hsync_len +
929 var->left_margin;
930 vtotal = var->yres + var->lower_margin + var->vsync_len +
931 var->upper_margin;
932
933 if (var->vmode & FB_VMODE_INTERLACED)
934 vtotal /= 2;
935 if (var->vmode & FB_VMODE_DOUBLE)
936 vtotal *= 2;
937
938 hfreq = pixclock/htotal;
939 mode->refresh = hfreq/vtotal;
940 }
941
942 /**
943 * fb_videomode_to_var - convert fb_videomode to fb_var_screeninfo
944 * @var: pointer to struct fb_var_screeninfo
945 * @mode: pointer to struct fb_videomode
946 */
fb_videomode_to_var(struct fb_var_screeninfo * var,const struct fb_videomode * mode)947 void fb_videomode_to_var(struct fb_var_screeninfo *var,
948 const struct fb_videomode *mode)
949 {
950 var->xres = mode->xres;
951 var->yres = mode->yres;
952 var->xres_virtual = mode->xres;
953 var->yres_virtual = mode->yres;
954 var->xoffset = 0;
955 var->yoffset = 0;
956 var->pixclock = mode->pixclock;
957 var->left_margin = mode->left_margin;
958 var->right_margin = mode->right_margin;
959 var->upper_margin = mode->upper_margin;
960 var->lower_margin = mode->lower_margin;
961 var->hsync_len = mode->hsync_len;
962 var->vsync_len = mode->vsync_len;
963 var->sync = mode->sync;
964 var->vmode = mode->vmode & FB_VMODE_MASK;
965 }
966
967 /**
968 * fb_mode_is_equal - compare 2 videomodes
969 * @mode1: first videomode
970 * @mode2: second videomode
971 *
972 * RETURNS:
973 * 1 if equal, 0 if not
974 */
fb_mode_is_equal(const struct fb_videomode * mode1,const struct fb_videomode * mode2)975 int fb_mode_is_equal(const struct fb_videomode *mode1,
976 const struct fb_videomode *mode2)
977 {
978 return (mode1->xres == mode2->xres &&
979 mode1->yres == mode2->yres &&
980 mode1->pixclock == mode2->pixclock &&
981 mode1->hsync_len == mode2->hsync_len &&
982 mode1->vsync_len == mode2->vsync_len &&
983 mode1->left_margin == mode2->left_margin &&
984 mode1->right_margin == mode2->right_margin &&
985 mode1->upper_margin == mode2->upper_margin &&
986 mode1->lower_margin == mode2->lower_margin &&
987 mode1->sync == mode2->sync &&
988 mode1->vmode == mode2->vmode);
989 }
990
991 /**
992 * fb_find_best_mode - find best matching videomode
993 * @var: pointer to struct fb_var_screeninfo
994 * @head: pointer to struct list_head of modelist
995 *
996 * RETURNS:
997 * struct fb_videomode, NULL if none found
998 *
999 * IMPORTANT:
1000 * This function assumes that all modelist entries in
1001 * info->modelist are valid.
1002 *
1003 * NOTES:
1004 * Finds best matching videomode which has an equal or greater dimension than
1005 * var->xres and var->yres. If more than 1 videomode is found, will return
1006 * the videomode with the highest refresh rate
1007 */
fb_find_best_mode(const struct fb_var_screeninfo * var,struct list_head * head)1008 const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
1009 struct list_head *head)
1010 {
1011 struct list_head *pos;
1012 struct fb_modelist *modelist;
1013 struct fb_videomode *mode, *best = NULL;
1014 u32 diff = -1;
1015
1016 list_for_each(pos, head) {
1017 u32 d;
1018
1019 modelist = list_entry(pos, struct fb_modelist, list);
1020 mode = &modelist->mode;
1021
1022 if (mode->xres >= var->xres && mode->yres >= var->yres) {
1023 d = (mode->xres - var->xres) +
1024 (mode->yres - var->yres);
1025 if (diff > d) {
1026 diff = d;
1027 best = mode;
1028 } else if (diff == d && best &&
1029 mode->refresh > best->refresh)
1030 best = mode;
1031 }
1032 }
1033 return best;
1034 }
1035
1036 /**
1037 * fb_find_nearest_mode - find closest videomode
1038 *
1039 * @mode: pointer to struct fb_videomode
1040 * @head: pointer to modelist
1041 *
1042 * Finds best matching videomode, smaller or greater in dimension.
1043 * If more than 1 videomode is found, will return the videomode with
1044 * the closest refresh rate.
1045 */
fb_find_nearest_mode(const struct fb_videomode * mode,struct list_head * head)1046 const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
1047 struct list_head *head)
1048 {
1049 struct list_head *pos;
1050 struct fb_modelist *modelist;
1051 struct fb_videomode *cmode, *best = NULL;
1052 u32 diff = -1, diff_refresh = -1;
1053
1054 list_for_each(pos, head) {
1055 u32 d;
1056
1057 modelist = list_entry(pos, struct fb_modelist, list);
1058 cmode = &modelist->mode;
1059
1060 d = abs(cmode->xres - mode->xres) +
1061 abs(cmode->yres - mode->yres);
1062 if (diff > d) {
1063 diff = d;
1064 diff_refresh = abs(cmode->refresh - mode->refresh);
1065 best = cmode;
1066 } else if (diff == d) {
1067 d = abs(cmode->refresh - mode->refresh);
1068 if (diff_refresh > d) {
1069 diff_refresh = d;
1070 best = cmode;
1071 }
1072 }
1073 }
1074
1075 return best;
1076 }
1077
1078 /**
1079 * fb_match_mode - find a videomode which exactly matches the timings in var
1080 * @var: pointer to struct fb_var_screeninfo
1081 * @head: pointer to struct list_head of modelist
1082 *
1083 * RETURNS:
1084 * struct fb_videomode, NULL if none found
1085 */
fb_match_mode(const struct fb_var_screeninfo * var,struct list_head * head)1086 const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
1087 struct list_head *head)
1088 {
1089 struct list_head *pos;
1090 struct fb_modelist *modelist;
1091 struct fb_videomode *m, mode;
1092
1093 fb_var_to_videomode(&mode, var);
1094 list_for_each(pos, head) {
1095 modelist = list_entry(pos, struct fb_modelist, list);
1096 m = &modelist->mode;
1097 if (fb_mode_is_equal(m, &mode))
1098 return m;
1099 }
1100 return NULL;
1101 }
1102
1103 /**
1104 * fb_add_videomode - adds videomode entry to modelist
1105 * @mode: videomode to add
1106 * @head: struct list_head of modelist
1107 *
1108 * NOTES:
1109 * Will only add unmatched mode entries
1110 */
fb_add_videomode(const struct fb_videomode * mode,struct list_head * head)1111 int fb_add_videomode(const struct fb_videomode *mode, struct list_head *head)
1112 {
1113 struct list_head *pos;
1114 struct fb_modelist *modelist;
1115 struct fb_videomode *m;
1116 int found = 0;
1117
1118 list_for_each(pos, head) {
1119 modelist = list_entry(pos, struct fb_modelist, list);
1120 m = &modelist->mode;
1121 if (fb_mode_is_equal(m, mode)) {
1122 found = 1;
1123 break;
1124 }
1125 }
1126 if (!found) {
1127 modelist = kmalloc(sizeof(struct fb_modelist),
1128 GFP_KERNEL);
1129
1130 if (!modelist)
1131 return -ENOMEM;
1132 modelist->mode = *mode;
1133 list_add(&modelist->list, head);
1134 }
1135 return 0;
1136 }
1137
1138 /**
1139 * fb_delete_videomode - removed videomode entry from modelist
1140 * @mode: videomode to remove
1141 * @head: struct list_head of modelist
1142 *
1143 * NOTES:
1144 * Will remove all matching mode entries
1145 */
fb_delete_videomode(const struct fb_videomode * mode,struct list_head * head)1146 void fb_delete_videomode(const struct fb_videomode *mode,
1147 struct list_head *head)
1148 {
1149 struct list_head *pos, *n;
1150 struct fb_modelist *modelist;
1151 struct fb_videomode *m;
1152
1153 list_for_each_safe(pos, n, head) {
1154 modelist = list_entry(pos, struct fb_modelist, list);
1155 m = &modelist->mode;
1156 if (fb_mode_is_equal(m, mode)) {
1157 list_del(pos);
1158 kfree(pos);
1159 }
1160 }
1161 }
1162
1163 /**
1164 * fb_destroy_modelist - destroy modelist
1165 * @head: struct list_head of modelist
1166 */
fb_destroy_modelist(struct list_head * head)1167 void fb_destroy_modelist(struct list_head *head)
1168 {
1169 struct list_head *pos, *n;
1170
1171 list_for_each_safe(pos, n, head) {
1172 list_del(pos);
1173 kfree(pos);
1174 }
1175 }
1176 EXPORT_SYMBOL_GPL(fb_destroy_modelist);
1177
1178 /**
1179 * fb_videomode_to_modelist - convert mode array to mode list
1180 * @modedb: array of struct fb_videomode
1181 * @num: number of entries in array
1182 * @head: struct list_head of modelist
1183 */
fb_videomode_to_modelist(const struct fb_videomode * modedb,int num,struct list_head * head)1184 void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
1185 struct list_head *head)
1186 {
1187 int i;
1188
1189 INIT_LIST_HEAD(head);
1190
1191 for (i = 0; i < num; i++) {
1192 if (fb_add_videomode(&modedb[i], head))
1193 return;
1194 }
1195 }
1196
fb_find_best_display(const struct fb_monspecs * specs,struct list_head * head)1197 const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
1198 struct list_head *head)
1199 {
1200 struct list_head *pos;
1201 struct fb_modelist *modelist;
1202 const struct fb_videomode *m, *m1 = NULL, *md = NULL, *best = NULL;
1203 int first = 0;
1204
1205 if (!head->prev || !head->next || list_empty(head))
1206 goto finished;
1207
1208 /* get the first detailed mode and the very first mode */
1209 list_for_each(pos, head) {
1210 modelist = list_entry(pos, struct fb_modelist, list);
1211 m = &modelist->mode;
1212
1213 if (!first) {
1214 m1 = m;
1215 first = 1;
1216 }
1217
1218 if (m->flag & FB_MODE_IS_FIRST) {
1219 md = m;
1220 break;
1221 }
1222 }
1223
1224 /* first detailed timing is preferred */
1225 if (specs->misc & FB_MISC_1ST_DETAIL) {
1226 best = md;
1227 goto finished;
1228 }
1229
1230 /* find best mode based on display width and height */
1231 if (specs->max_x && specs->max_y) {
1232 struct fb_var_screeninfo var;
1233
1234 memset(&var, 0, sizeof(struct fb_var_screeninfo));
1235 var.xres = (specs->max_x * 7200)/254;
1236 var.yres = (specs->max_y * 7200)/254;
1237 m = fb_find_best_mode(&var, head);
1238 if (m) {
1239 best = m;
1240 goto finished;
1241 }
1242 }
1243
1244 /* use first detailed mode */
1245 if (md) {
1246 best = md;
1247 goto finished;
1248 }
1249
1250 /* last resort, use the very first mode */
1251 best = m1;
1252 finished:
1253 return best;
1254 }
1255 EXPORT_SYMBOL(fb_find_best_display);
1256
1257 EXPORT_SYMBOL(fb_videomode_to_var);
1258 EXPORT_SYMBOL(fb_var_to_videomode);
1259 EXPORT_SYMBOL(fb_mode_is_equal);
1260 EXPORT_SYMBOL(fb_add_videomode);
1261 EXPORT_SYMBOL(fb_match_mode);
1262 EXPORT_SYMBOL(fb_find_best_mode);
1263 EXPORT_SYMBOL(fb_find_nearest_mode);
1264 EXPORT_SYMBOL(fb_videomode_to_modelist);
1265 EXPORT_SYMBOL(fb_find_mode);
1266 EXPORT_SYMBOL(fb_find_mode_cvt);
1267
