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drivers/video/i810/i810-i2c.c: fix i2c bus handling
[deliverable/linux.git] / drivers / video / modedb.c
CommitLineData
1da177e4
LT		 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>
5a0e3ad6 15#include <linux/slab.h>
1da177e4 16#include <linux/fb.h>
2cb96f86 17#include <linux/kernel.h>
1da177e4
LT		 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
5ae12170 27#define DPRINTK(fmt, args...) printk("modedb %s: " fmt, __func__ , ## args)
1da177e4
LT		 28#else
29#define DPRINTK(fmt, args...)
30#endif
31
9a054fba 32const char *fb_mode_option;
659179b2 33EXPORT_SYMBOL_GPL(fb_mode_option);
1da177e4
LT		 34
35 /*
36 * Standard video mode definitions (taken from XFree86)
37 */
38
1da177e4
LT		 39static const struct fb_videomode modedb[] = {
40 {
41 /* 640x400 @ 70 Hz, 31.5 kHz hsync */
42 NULL, 70, 640, 400, 39721, 40, 24, 39, 9, 96, 2,
43 0, FB_VMODE_NONINTERLACED
44 }, {
45 /* 640x480 @ 60 Hz, 31.5 kHz hsync */
46 NULL, 60, 640, 480, 39721, 40, 24, 32, 11, 96, 2,
47 0, FB_VMODE_NONINTERLACED
48 }, {
49 /* 800x600 @ 56 Hz, 35.15 kHz hsync */
50 NULL, 56, 800, 600, 27777, 128, 24, 22, 1, 72, 2,
51 0, FB_VMODE_NONINTERLACED
52 }, {
53 /* 1024x768 @ 87 Hz interlaced, 35.5 kHz hsync */
54 NULL, 87, 1024, 768, 22271, 56, 24, 33, 8, 160, 8,
55 0, FB_VMODE_INTERLACED
56 }, {
57 /* 640x400 @ 85 Hz, 37.86 kHz hsync */
58 NULL, 85, 640, 400, 31746, 96, 32, 41, 1, 64, 3,
59 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
60 }, {
61 /* 640x480 @ 72 Hz, 36.5 kHz hsync */
62 NULL, 72, 640, 480, 31746, 144, 40, 30, 8, 40, 3,
63 0, FB_VMODE_NONINTERLACED
64 }, {
65 /* 640x480 @ 75 Hz, 37.50 kHz hsync */
66 NULL, 75, 640, 480, 31746, 120, 16, 16, 1, 64, 3,
67 0, FB_VMODE_NONINTERLACED
68 }, {
69 /* 800x600 @ 60 Hz, 37.8 kHz hsync */
70 NULL, 60, 800, 600, 25000, 88, 40, 23, 1, 128, 4,
71 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
72 }, {
73 /* 640x480 @ 85 Hz, 43.27 kHz hsync */
74 NULL, 85, 640, 480, 27777, 80, 56, 25, 1, 56, 3,
75 0, FB_VMODE_NONINTERLACED
76 }, {
77 /* 1152x864 @ 89 Hz interlaced, 44 kHz hsync */
9d775e17 78 NULL, 89, 1152, 864, 15384, 96, 16, 110, 1, 216, 10,
1da177e4
LT		 79 0, FB_VMODE_INTERLACED
80 }, {
81 /* 800x600 @ 72 Hz, 48.0 kHz hsync */
82 NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
83 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
84 }, {
85 /* 1024x768 @ 60 Hz, 48.4 kHz hsync */
86 NULL, 60, 1024, 768, 15384, 168, 8, 29, 3, 144, 6,
87 0, FB_VMODE_NONINTERLACED
88 }, {
89 /* 640x480 @ 100 Hz, 53.01 kHz hsync */
90 NULL, 100, 640, 480, 21834, 96, 32, 36, 8, 96, 6,
91 0, FB_VMODE_NONINTERLACED
92 }, {
93 /* 1152x864 @ 60 Hz, 53.5 kHz hsync */
94 NULL, 60, 1152, 864, 11123, 208, 64, 16, 4, 256, 8,
95 0, FB_VMODE_NONINTERLACED
96 }, {
97 /* 800x600 @ 85 Hz, 55.84 kHz hsync */
98 NULL, 85, 800, 600, 16460, 160, 64, 36, 16, 64, 5,
99 0, FB_VMODE_NONINTERLACED
100 }, {
101 /* 1024x768 @ 70 Hz, 56.5 kHz hsync */
102 NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6,
103 0, FB_VMODE_NONINTERLACED
104 }, {
105 /* 1280x1024 @ 87 Hz interlaced, 51 kHz hsync */
106 NULL, 87, 1280, 1024, 12500, 56, 16, 128, 1, 216, 12,
107 0, FB_VMODE_INTERLACED
108 }, {
109 /* 800x600 @ 100 Hz, 64.02 kHz hsync */
110 NULL, 100, 800, 600, 14357, 160, 64, 30, 4, 64, 6,
111 0, FB_VMODE_NONINTERLACED
112 }, {
113 /* 1024x768 @ 76 Hz, 62.5 kHz hsync */
114 NULL, 76, 1024, 768, 11764, 208, 8, 36, 16, 120, 3,
115 0, FB_VMODE_NONINTERLACED
116 }, {
117 /* 1152x864 @ 70 Hz, 62.4 kHz hsync */
118 NULL, 70, 1152, 864, 10869, 106, 56, 20, 1, 160, 10,
119 0, FB_VMODE_NONINTERLACED
120 }, {
121 /* 1280x1024 @ 61 Hz, 64.2 kHz hsync */
122 NULL, 61, 1280, 1024, 9090, 200, 48, 26, 1, 184, 3,
123 0, FB_VMODE_NONINTERLACED
124 }, {
125 /* 1400x1050 @ 60Hz, 63.9 kHz hsync */
9d775e17 126 NULL, 60, 1400, 1050, 9259, 136, 40, 13, 1, 112, 3,
1da177e4
LT		 127 0, FB_VMODE_NONINTERLACED
128 }, {
129 /* 1400x1050 @ 75,107 Hz, 82,392 kHz +hsync +vsync*/
9d775e17 130 NULL, 75, 1400, 1050, 7190, 120, 56, 23, 10, 112, 13,
1da177e4
LT		 131 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
132 }, {
133 /* 1400x1050 @ 60 Hz, ? kHz +hsync +vsync*/
134 NULL, 60, 1400, 1050, 9259, 128, 40, 12, 0, 112, 3,
135 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
136 }, {
137 /* 1024x768 @ 85 Hz, 70.24 kHz hsync */
138 NULL, 85, 1024, 768, 10111, 192, 32, 34, 14, 160, 6,
139 0, FB_VMODE_NONINTERLACED
140 }, {
141 /* 1152x864 @ 78 Hz, 70.8 kHz hsync */
142 NULL, 78, 1152, 864, 9090, 228, 88, 32, 0, 84, 12,
143 0, FB_VMODE_NONINTERLACED
144 }, {
145 /* 1280x1024 @ 70 Hz, 74.59 kHz hsync */
146 NULL, 70, 1280, 1024, 7905, 224, 32, 28, 8, 160, 8,
147 0, FB_VMODE_NONINTERLACED
148 }, {
149 /* 1600x1200 @ 60Hz, 75.00 kHz hsync */
150 NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
151 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
152 }, {
153 /* 1152x864 @ 84 Hz, 76.0 kHz hsync */
154 NULL, 84, 1152, 864, 7407, 184, 312, 32, 0, 128, 12,
155 0, FB_VMODE_NONINTERLACED
156 }, {
157 /* 1280x1024 @ 74 Hz, 78.85 kHz hsync */
158 NULL, 74, 1280, 1024, 7407, 256, 32, 34, 3, 144, 3,
159 0, FB_VMODE_NONINTERLACED
160 }, {
161 /* 1024x768 @ 100Hz, 80.21 kHz hsync */
162 NULL, 100, 1024, 768, 8658, 192, 32, 21, 3, 192, 10,
163 0, FB_VMODE_NONINTERLACED
164 }, {
165 /* 1280x1024 @ 76 Hz, 81.13 kHz hsync */
166 NULL, 76, 1280, 1024, 7407, 248, 32, 34, 3, 104, 3,
167 0, FB_VMODE_NONINTERLACED
168 }, {
169 /* 1600x1200 @ 70 Hz, 87.50 kHz hsync */
170 NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
171 0, FB_VMODE_NONINTERLACED
172 }, {
173 /* 1152x864 @ 100 Hz, 89.62 kHz hsync */
174 NULL, 100, 1152, 864, 7264, 224, 32, 17, 2, 128, 19,
175 0, FB_VMODE_NONINTERLACED
176 }, {
177 /* 1280x1024 @ 85 Hz, 91.15 kHz hsync */
178 NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
179 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
180 }, {
181 /* 1600x1200 @ 75 Hz, 93.75 kHz hsync */
182 NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
183 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
b0c87978
OH		 184 }, {
185 /* 1680x1050 @ 60 Hz, 65.191 kHz hsync */
186 NULL, 60, 1680, 1050, 6848, 280, 104, 30, 3, 176, 6,
187 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
1da177e4
LT		 188 }, {
189 /* 1600x1200 @ 85 Hz, 105.77 kHz hsync */
190 NULL, 85, 1600, 1200, 4545, 272, 16, 37, 4, 192, 3,
191 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
192 }, {
193 /* 1280x1024 @ 100 Hz, 107.16 kHz hsync */
194 NULL, 100, 1280, 1024, 5502, 256, 32, 26, 7, 128, 15,
195 0, FB_VMODE_NONINTERLACED
196 }, {
197 /* 1800x1440 @ 64Hz, 96.15 kHz hsync */
198 NULL, 64, 1800, 1440, 4347, 304, 96, 46, 1, 192, 3,
199 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
200 }, {
201 /* 1800x1440 @ 70Hz, 104.52 kHz hsync */
202 NULL, 70, 1800, 1440, 4000, 304, 96, 46, 1, 192, 3,
203 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
204 }, {
205 /* 512x384 @ 78 Hz, 31.50 kHz hsync */
206 NULL, 78, 512, 384, 49603, 48, 16, 16, 1, 64, 3,
207 0, FB_VMODE_NONINTERLACED
208 }, {
209 /* 512x384 @ 85 Hz, 34.38 kHz hsync */
210 NULL, 85, 512, 384, 45454, 48, 16, 16, 1, 64, 3,
211 0, FB_VMODE_NONINTERLACED
212 }, {
213 /* 320x200 @ 70 Hz, 31.5 kHz hsync, 8:5 aspect ratio */
214 NULL, 70, 320, 200, 79440, 16, 16, 20, 4, 48, 1,
215 0, FB_VMODE_DOUBLE
216 }, {
217 /* 320x240 @ 60 Hz, 31.5 kHz hsync, 4:3 aspect ratio */
218 NULL, 60, 320, 240, 79440, 16, 16, 16, 5, 48, 1,
219 0, FB_VMODE_DOUBLE
220 }, {
221 /* 320x240 @ 72 Hz, 36.5 kHz hsync */
222 NULL, 72, 320, 240, 63492, 16, 16, 16, 4, 48, 2,
223 0, FB_VMODE_DOUBLE
224 }, {
225 /* 400x300 @ 56 Hz, 35.2 kHz hsync, 4:3 aspect ratio */
226 NULL, 56, 400, 300, 55555, 64, 16, 10, 1, 32, 1,
227 0, FB_VMODE_DOUBLE
228 }, {
229 /* 400x300 @ 60 Hz, 37.8 kHz hsync */
230 NULL, 60, 400, 300, 50000, 48, 16, 11, 1, 64, 2,
231 0, FB_VMODE_DOUBLE
232 }, {
233 /* 400x300 @ 72 Hz, 48.0 kHz hsync */
234 NULL, 72, 400, 300, 40000, 32, 24, 11, 19, 64, 3,
235 0, FB_VMODE_DOUBLE
236 }, {
237 /* 480x300 @ 56 Hz, 35.2 kHz hsync, 8:5 aspect ratio */
238 NULL, 56, 480, 300, 46176, 80, 16, 10, 1, 40, 1,
239 0, FB_VMODE_DOUBLE
240 }, {
241 /* 480x300 @ 60 Hz, 37.8 kHz hsync */
242 NULL, 60, 480, 300, 41858, 56, 16, 11, 1, 80, 2,
243 0, FB_VMODE_DOUBLE
244 }, {
245 /* 480x300 @ 63 Hz, 39.6 kHz hsync */
246 NULL, 63, 480, 300, 40000, 56, 16, 11, 1, 80, 2,
247 0, FB_VMODE_DOUBLE
248 }, {
249 /* 480x300 @ 72 Hz, 48.0 kHz hsync */
250 NULL, 72, 480, 300, 33386, 40, 24, 11, 19, 80, 3,
251 0, FB_VMODE_DOUBLE
db6778db
AD		 252 }, {
253 /* 1920x1200 @ 60 Hz, 74.5 Khz hsync */
254 NULL, 60, 1920, 1200, 5177, 128, 336, 1, 38, 208, 3,
255 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
256 FB_VMODE_NONINTERLACED
1dfcdfae
MH		 257 }, {
258 /* 1152x768, 60 Hz, PowerBook G4 Titanium I and II */
9d775e17 259 NULL, 60, 1152, 768, 14047, 158, 26, 29, 3, 136, 6,
1dfcdfae 260 FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
f71689e4
DM		 261 }, {
262 /* 1366x768, 60 Hz, 47.403 kHz hsync, WXGA 16:9 aspect ratio */
263 NULL, 60, 1366, 768, 13806, 120, 10, 14, 3, 32, 5,
264 0, FB_VMODE_NONINTERLACED
545c4423
A		 265 }, {
266 /* 1280x800, 60 Hz, 47.403 kHz hsync, WXGA 16:10 aspect ratio */
267 NULL, 60, 1280, 800, 12048, 200, 64, 24, 1, 136, 3,
268 0, FB_VMODE_NONINTERLACED
27b7f2e3
PM		 269 }, {
270 /* 720x576i @ 50 Hz, 15.625 kHz hsync (PAL RGB) */
271 NULL, 50, 720, 576, 74074, 64, 16, 39, 5, 64, 5,
272 0, FB_VMODE_INTERLACED
273 }, {
274 /* 800x520i @ 50 Hz, 15.625 kHz hsync (PAL RGB) */
275 NULL, 50, 800, 520, 58823, 144, 64, 72, 28, 80, 5,
276 0, FB_VMODE_INTERLACED
1da177e4
LT		 277 },
278};
279
280#ifdef CONFIG_FB_MODE_HELPERS
0ad83f68
GL		 281const struct fb_videomode cea_modes[64] = {
282 /* #1: 640x480p@59.94/60Hz */
283 [1] = {
284 NULL, 60, 640, 480, 39722, 48, 16, 33, 10, 96, 2, 0, FB_VMODE_NONINTERLACED, 0,
285 },
286 /* #3: 720x480p@59.94/60Hz */
287 [3] = {
288 NULL, 60, 720, 480, 37037, 60, 16, 30, 9, 62, 6, 0, FB_VMODE_NONINTERLACED, 0,
289 },
290 /* #5: 1920x1080i@59.94/60Hz */
291 [5] = {
2006920a
AH		 292 NULL, 60, 1920, 1080, 13763, 148, 88, 15, 2, 44, 5,
293 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_INTERLACED, 0,
0ad83f68
GL		 294 },
295 /* #7: 720(1440)x480iH@59.94/60Hz */
296 [7] = {
297 NULL, 60, 1440, 480, 18554/*37108*/, 114, 38, 15, 4, 124, 3, 0, FB_VMODE_INTERLACED, 0,
298 },
299 /* #9: 720(1440)x240pH@59.94/60Hz */
300 [9] = {
301 NULL, 60, 1440, 240, 18554, 114, 38, 16, 4, 124, 3, 0, FB_VMODE_NONINTERLACED, 0,
302 },
303 /* #18: 720x576pH@50Hz */
304 [18] = {
305 NULL, 50, 720, 576, 37037, 68, 12, 39, 5, 64, 5, 0, FB_VMODE_NONINTERLACED, 0,
306 },
307 /* #19: 1280x720p@50Hz */
308 [19] = {
2006920a
AH		 309 NULL, 50, 1280, 720, 13468, 220, 440, 20, 5, 40, 5,
310 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, 0,
0ad83f68
GL		 311 },
312 /* #20: 1920x1080i@50Hz */
313 [20] = {
2006920a
AH		 314 NULL, 50, 1920, 1080, 13480, 148, 528, 15, 5, 528, 5,
315 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_INTERLACED, 0,
0ad83f68
GL		 316 },
317 /* #32: 1920x1080p@23.98/24Hz */
318 [32] = {
2006920a
AH		 319 NULL, 24, 1920, 1080, 13468, 148, 638, 36, 4, 44, 5,
320 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, 0,
0ad83f68
GL		 321 },
322 /* #35: (2880)x480p4x@59.94/60Hz */
323 [35] = {
2006920a 324 NULL, 60, 2880, 480, 9250, 240, 64, 30, 9, 248, 6, 0, FB_VMODE_NONINTERLACED, 0,
0ad83f68
GL		 325 },
326};
327
1da177e4
LT		 328const struct fb_videomode vesa_modes[] = {
329 /* 0 640x350-85 VESA */
330 { NULL, 85, 640, 350, 31746, 96, 32, 60, 32, 64, 3,
331 FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA},
332 /* 1 640x400-85 VESA */
333 { NULL, 85, 640, 400, 31746, 96, 32, 41, 01, 64, 3,
334 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
335 /* 2 720x400-85 VESA */
336 { NULL, 85, 721, 400, 28169, 108, 36, 42, 01, 72, 3,
337 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
338 /* 3 640x480-60 VESA */
339 { NULL, 60, 640, 480, 39682, 48, 16, 33, 10, 96, 2,
340 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
341 /* 4 640x480-72 VESA */
342 { NULL, 72, 640, 480, 31746, 128, 24, 29, 9, 40, 2,
343 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
344 /* 5 640x480-75 VESA */
345 { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
346 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
347 /* 6 640x480-85 VESA */
348 { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
349 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
350 /* 7 800x600-56 VESA */
351 { NULL, 56, 800, 600, 27777, 128, 24, 22, 01, 72, 2,
352 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
353 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
354 /* 8 800x600-60 VESA */
355 { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
356 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
357 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
358 /* 9 800x600-72 VESA */
359 { NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
360 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
361 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
362 /* 10 800x600-75 VESA */
363 { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
364 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
365 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
366 /* 11 800x600-85 VESA */
367 { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
368 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
369 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
370 /* 12 1024x768i-43 VESA */
9d775e17 371 { NULL, 43, 1024, 768, 22271, 56, 8, 41, 0, 176, 8,
1da177e4
LT		 372 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
373 FB_VMODE_INTERLACED, FB_MODE_IS_VESA },
374 /* 13 1024x768-60 VESA */
375 { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
376 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
377 /* 14 1024x768-70 VESA */
378 { NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6,
379 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
380 /* 15 1024x768-75 VESA */
381 { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
382 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
383 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
384 /* 16 1024x768-85 VESA */
385 { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
386 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
387 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
388 /* 17 1152x864-75 VESA */
3efbb987 389 { NULL, 75, 1152, 864, 9259, 256, 64, 32, 1, 128, 3,
1da177e4
LT		 390 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
391 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
392 /* 18 1280x960-60 VESA */
393 { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
394 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
395 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
396 /* 19 1280x960-85 VESA */
397 { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
398 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
399 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
400 /* 20 1280x1024-60 VESA */
401 { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
402 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
403 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
404 /* 21 1280x1024-75 VESA */
405 { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
406 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
407 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
408 /* 22 1280x1024-85 VESA */
409 { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
410 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
411 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
412 /* 23 1600x1200-60 VESA */
413 { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
414 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
415 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
416 /* 24 1600x1200-65 VESA */
417 { NULL, 65, 1600, 1200, 5698, 304, 64, 46, 1, 192, 3,
418 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
419 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
420 /* 25 1600x1200-70 VESA */
421 { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
422 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
423 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
424 /* 26 1600x1200-75 VESA */
425 { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
426 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
427 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
428 /* 27 1600x1200-85 VESA */
429 { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
430 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
431 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
432 /* 28 1792x1344-60 VESA */
433 { NULL, 60, 1792, 1344, 4882, 328, 128, 46, 1, 200, 3,
434 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
435 /* 29 1792x1344-75 VESA */
436 { NULL, 75, 1792, 1344, 3831, 352, 96, 69, 1, 216, 3,
437 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
438 /* 30 1856x1392-60 VESA */
439 { NULL, 60, 1856, 1392, 4580, 352, 96, 43, 1, 224, 3,
440 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
441 /* 31 1856x1392-75 VESA */
442 { NULL, 75, 1856, 1392, 3472, 352, 128, 104, 1, 224, 3,
443 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
444 /* 32 1920x1440-60 VESA */
445 { NULL, 60, 1920, 1440, 4273, 344, 128, 56, 1, 200, 3,
446 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
447 /* 33 1920x1440-75 VESA */
9d775e17 448 { NULL, 75, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3,
1da177e4
LT		 449 FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
450};
451EXPORT_SYMBOL(vesa_modes);
452#endif /* CONFIG_FB_MODE_HELPERS */
453
1da177e4
LT		 454/**
455 * fb_try_mode - test a video mode
456 * @var: frame buffer user defined part of display
457 * @info: frame buffer info structure
458 * @mode: frame buffer video mode structure
459 * @bpp: color depth in bits per pixel
460 *
461 * Tries a video mode to test it's validity for device @info.
462 *
463 * Returns 1 on success.
464 *
465 */
466
467static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
468 const struct fb_videomode *mode, unsigned int bpp)
469{
470 int err = 0;
471
472 DPRINTK("Trying mode %s %dx%d-%d@%d\n", mode->name ? mode->name : "noname",
473 mode->xres, mode->yres, bpp, mode->refresh);
474 var->xres = mode->xres;
475 var->yres = mode->yres;
476 var->xres_virtual = mode->xres;
477 var->yres_virtual = mode->yres;
478 var->xoffset = 0;
479 var->yoffset = 0;
480 var->bits_per_pixel = bpp;
481 var->activate |= FB_ACTIVATE_TEST;
482 var->pixclock = mode->pixclock;
483 var->left_margin = mode->left_margin;
484 var->right_margin = mode->right_margin;
485 var->upper_margin = mode->upper_margin;
486 var->lower_margin = mode->lower_margin;
487 var->hsync_len = mode->hsync_len;
488 var->vsync_len = mode->vsync_len;
489 var->sync = mode->sync;
490 var->vmode = mode->vmode;
491 if (info->fbops->fb_check_var)
492 err = info->fbops->fb_check_var(var, info);
493 var->activate &= ~FB_ACTIVATE_TEST;
494 return err;
495}
496
497/**
498 * fb_find_mode - finds a valid video mode
499 * @var: frame buffer user defined part of display
500 * @info: frame buffer info structure
501 * @mode_option: string video mode to find
502 * @db: video mode database
503 * @dbsize: size of @db
504 * @default_mode: default video mode to fall back to
505 * @default_bpp: default color depth in bits per pixel
506 *
507 * Finds a suitable video mode, starting with the specified mode
508 * in @mode_option with fallback to @default_mode. If
509 * @default_mode fails, all modes in the video mode database will
510 * be tried.
511 *
512 * Valid mode specifiers for @mode_option:
513 *
96fe6a21 514 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m] or
1da177e4
LT		 515 * <name>[-<bpp>][@<refresh>]
516 *
517 * with <xres>, <yres>, <bpp> and <refresh> decimal numbers and
518 * <name> a string.
519 *
96fe6a21
AD		 520 * If 'M' is present after yres (and before refresh/bpp if present),
521 * the function will compute the timings using VESA(tm) Coordinated
522 * Video Timings (CVT). If 'R' is present after 'M', will compute with
523 * reduced blanking (for flatpanels). If 'i' is present, compute
524 * interlaced mode. If 'm' is present, add margins equal to 1.8%
525 * of xres rounded down to 8 pixels, and 1.8% of yres. The char
526 * 'i' and 'm' must be after 'M' and 'R'. Example:
527 *
528 * 1024x768MR-8@60m - Reduced blank with margins at 60Hz.
529 *
1da177e4
LT		 530 * NOTE: The passed struct @var is _not_ cleared! This allows you
531 * to supply values for e.g. the grayscale and accel_flags fields.
532 *
533 * Returns zero for failure, 1 if using specified @mode_option,
534 * 2 if using specified @mode_option with an ignored refresh rate,
535 * 3 if default mode is used, 4 if fall back to any valid mode.
536 *
537 */
538
539int fb_find_mode(struct fb_var_screeninfo *var,
540 struct fb_info *info, const char *mode_option,
541 const struct fb_videomode *db, unsigned int dbsize,
542 const struct fb_videomode *default_mode,
543 unsigned int default_bpp)
544{
545 int i;
546
547 /* Set up defaults */
548 if (!db) {
549 db = modedb;
d1ae418e 550 dbsize = ARRAY_SIZE(modedb);
1da177e4 551 }
c25623f5 552
1da177e4 553 if (!default_mode)
c25623f5
JC		 554 default_mode = &db[0];
555
1da177e4
LT		 556 if (!default_bpp)
557 default_bpp = 8;
558
559 /* Did the user specify a video mode? */
c40eea98
GU		 560 if (!mode_option)
561 mode_option = fb_mode_option;
562 if (mode_option) {
1da177e4
LT		 563 const char *name = mode_option;
564 unsigned int namelen = strlen(name);
565 int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
566 unsigned int xres = 0, yres = 0, bpp = default_bpp, refresh = 0;
96fe6a21 567 int yres_specified = 0, cvt = 0, rb = 0, interlace = 0, margins = 0;
6b745b6f 568 u32 best, diff, tdiff;
1da177e4
LT		 569
570 for (i = namelen-1; i >= 0; i--) {
571 switch (name[i]) {
572 case '@':
573 namelen = i;
574 if (!refresh_specified && !bpp_specified &&
575 !yres_specified) {
2cb96f86 576 refresh = simple_strtol(&name[i+1], NULL, 10);
1da177e4 577 refresh_specified = 1;
96fe6a21
AD		 578 if (cvt || rb)
579 cvt = 0;
1da177e4
LT		 580 } else
581 goto done;
582 break;
583 case '-':
584 namelen = i;
585 if (!bpp_specified && !yres_specified) {
2cb96f86 586 bpp = simple_strtol(&name[i+1], NULL, 10);
1da177e4 587 bpp_specified = 1;
96fe6a21
AD		 588 if (cvt || rb)
589 cvt = 0;
1da177e4
LT		 590 } else
591 goto done;
592 break;
593 case 'x':
594 if (!yres_specified) {
2cb96f86 595 yres = simple_strtol(&name[i+1], NULL, 10);
1da177e4
LT		 596 yres_specified = 1;
597 } else
598 goto done;
599 break;
88b229c7 600 case '0' ... '9':
1da177e4 601 break;
96fe6a21
AD		 602 case 'M':
603 if (!yres_specified)
604 cvt = 1;
605 break;
606 case 'R':
607 if (!cvt)
608 rb = 1;
609 break;
610 case 'm':
611 if (!cvt)
612 margins = 1;
613 break;
614 case 'i':
615 if (!cvt)
616 interlace = 1;
617 break;
1da177e4
LT		 618 default:
619 goto done;
620 }
621 }
622 if (i < 0 && yres_specified) {
2cb96f86 623 xres = simple_strtol(name, NULL, 10);
1da177e4
LT		 624 res_specified = 1;
625 }
626done:
96fe6a21
AD		 627 if (cvt) {
628 struct fb_videomode cvt_mode;
629 int ret;
630
631 DPRINTK("CVT mode %dx%d@%dHz%s%s%s\n", xres, yres,
632 (refresh) ? refresh : 60, (rb) ? " reduced blanking" :
633 "", (margins) ? " with margins" : "", (interlace) ?
634 " interlaced" : "");
635
e2d4ecaf 636 memset(&cvt_mode, 0, sizeof(cvt_mode));
96fe6a21
AD		 637 cvt_mode.xres = xres;
638 cvt_mode.yres = yres;
639 cvt_mode.refresh = (refresh) ? refresh : 60;
640
641 if (interlace)
642 cvt_mode.vmode |= FB_VMODE_INTERLACED;
643 else
644 cvt_mode.vmode &= ~FB_VMODE_INTERLACED;
645
646 ret = fb_find_mode_cvt(&cvt_mode, margins, rb);
647
648 if (!ret && !fb_try_mode(var, info, &cvt_mode, bpp)) {
649 DPRINTK("modedb CVT: CVT mode ok\n");
650 return 1;
651 }
652
653 DPRINTK("CVT mode invalid, getting mode from database\n");
654 }
655
1da177e4
LT		 656 DPRINTK("Trying specified video mode%s %ix%i\n",
657 refresh_specified ? "" : " (ignoring refresh rate)", xres, yres);
658
1c5dd170
MJ		 659 if (!refresh_specified) {
660 /*
661 * If the caller has provided a custom mode database and a
662 * valid monspecs structure, we look for the mode with the
663 * highest refresh rate. Otherwise we play it safe it and
664 * try to find a mode with a refresh rate closest to the
665 * standard 60 Hz.
666 */
667 if (db != modedb &&
668 info->monspecs.vfmin && info->monspecs.vfmax &&
669 info->monspecs.hfmin && info->monspecs.hfmax &&
670 info->monspecs.dclkmax) {
671 refresh = 1000;
672 } else {
673 refresh = 60;
674 }
675 }
676
677 diff = -1;
1da177e4
LT		 678 best = -1;
679 for (i = 0; i < dbsize; i++) {
1c5dd170
MJ		 680 if ((name_matches(db[i], name, namelen) ||
681 (res_specified && res_matches(db[i], xres, yres))) &&
682 !fb_try_mode(var, info, &db[i], bpp)) {
683 if (refresh_specified && db[i].refresh == refresh) {
684 return 1;
685 } else {
686 if (abs(db[i].refresh - refresh) < diff) {
687 diff = abs(db[i].refresh - refresh);
688 best = i;
1da177e4
LT		 689 }
690 }
691 }
692 }
693 if (best != -1) {
694 fb_try_mode(var, info, &db[best], bpp);
1c5dd170 695 return (refresh_specified) ? 2 : 1;
1da177e4
LT		 696 }
697
6b745b6f 698 diff = 2 * (xres + yres);
1da177e4
LT		 699 best = -1;
700 DPRINTK("Trying best-fit modes\n");
701 for (i = 0; i < dbsize; i++) {
1da177e4
LT		 702 DPRINTK("Trying %ix%i\n", db[i].xres, db[i].yres);
703 if (!fb_try_mode(var, info, &db[i], bpp)) {
6b745b6f
MJ		 704 tdiff = abs(db[i].xres - xres) +
705 abs(db[i].yres - yres);
706
707 /*
708 * Penalize modes with resolutions smaller
709 * than requested.
710 */
711 if (xres > db[i].xres || yres > db[i].yres)
712 tdiff += xres + yres;
713
714 if (diff > tdiff) {
715 diff = tdiff;
716 best = i;
717 }
1da177e4 718 }
1da177e4
LT		 719 }
720 if (best != -1) {
721 fb_try_mode(var, info, &db[best], bpp);
722 return 5;
723 }
724 }
725
726 DPRINTK("Trying default video mode\n");
727 if (!fb_try_mode(var, info, default_mode, default_bpp))
728 return 3;
729
730 DPRINTK("Trying all modes\n");
731 for (i = 0; i < dbsize; i++)
732 if (!fb_try_mode(var, info, &db[i], default_bpp))
733 return 4;
734
735 DPRINTK("No valid mode found\n");
736 return 0;
737}
738
739/**
740 * fb_var_to_videomode - convert fb_var_screeninfo to fb_videomode
741 * @mode: pointer to struct fb_videomode
742 * @var: pointer to struct fb_var_screeninfo
743 */
744void fb_var_to_videomode(struct fb_videomode *mode,
9791d763 745 const struct fb_var_screeninfo *var)
1da177e4
LT		 746{
747 u32 pixclock, hfreq, htotal, vtotal;
748
749 mode->name = NULL;
750 mode->xres = var->xres;
751 mode->yres = var->yres;
752 mode->pixclock = var->pixclock;
753 mode->hsync_len = var->hsync_len;
754 mode->vsync_len = var->vsync_len;
755 mode->left_margin = var->left_margin;
756 mode->right_margin = var->right_margin;
757 mode->upper_margin = var->upper_margin;
758 mode->lower_margin = var->lower_margin;
759 mode->sync = var->sync;
760 mode->vmode = var->vmode & FB_VMODE_MASK;
761 mode->flag = FB_MODE_IS_FROM_VAR;
8fb6567e
MJ		 762 mode->refresh = 0;
763
1da177e4
LT		 764 if (!var->pixclock)
765 return;
766
767 pixclock = PICOS2KHZ(var->pixclock) * 1000;
768
769 htotal = var->xres + var->right_margin + var->hsync_len +
770 var->left_margin;
771 vtotal = var->yres + var->lower_margin + var->vsync_len +
772 var->upper_margin;
773
774 if (var->vmode & FB_VMODE_INTERLACED)
775 vtotal /= 2;
776 if (var->vmode & FB_VMODE_DOUBLE)
777 vtotal *= 2;
778
779 hfreq = pixclock/htotal;
780 mode->refresh = hfreq/vtotal;
781}
782
783/**
784 * fb_videomode_to_var - convert fb_videomode to fb_var_screeninfo
785 * @var: pointer to struct fb_var_screeninfo
786 * @mode: pointer to struct fb_videomode
787 */
788void fb_videomode_to_var(struct fb_var_screeninfo *var,
9791d763 789 const struct fb_videomode *mode)
1da177e4
LT		 790{
791 var->xres = mode->xres;
792 var->yres = mode->yres;
dcfe2666
GU		 793 var->xres_virtual = mode->xres;
794 var->yres_virtual = mode->yres;
795 var->xoffset = 0;
796 var->yoffset = 0;
1da177e4
LT		 797 var->pixclock = mode->pixclock;
798 var->left_margin = mode->left_margin;
1da177e4
LT		 799 var->right_margin = mode->right_margin;
800 var->upper_margin = mode->upper_margin;
801 var->lower_margin = mode->lower_margin;
dcfe2666
GU		 802 var->hsync_len = mode->hsync_len;
803 var->vsync_len = mode->vsync_len;
1da177e4
LT		 804 var->sync = mode->sync;
805 var->vmode = mode->vmode & FB_VMODE_MASK;
806}
807
808/**
809 * fb_mode_is_equal - compare 2 videomodes
810 * @mode1: first videomode
811 * @mode2: second videomode
812 *
813 * RETURNS:
814 * 1 if equal, 0 if not
815 */
9791d763
GU		 816int fb_mode_is_equal(const struct fb_videomode *mode1,
817 const struct fb_videomode *mode2)
1da177e4
LT		 818{
819 return (mode1->xres == mode2->xres &&
820 mode1->yres == mode2->yres &&
821 mode1->pixclock == mode2->pixclock &&
822 mode1->hsync_len == mode2->hsync_len &&
823 mode1->vsync_len == mode2->vsync_len &&
824 mode1->left_margin == mode2->left_margin &&
825 mode1->right_margin == mode2->right_margin &&
826 mode1->upper_margin == mode2->upper_margin &&
827 mode1->lower_margin == mode2->lower_margin &&
828 mode1->sync == mode2->sync &&
829 mode1->vmode == mode2->vmode);
830}
831
832/**
833 * fb_find_best_mode - find best matching videomode
834 * @var: pointer to struct fb_var_screeninfo
835 * @head: pointer to struct list_head of modelist
836 *
837 * RETURNS:
838 * struct fb_videomode, NULL if none found
839 *
840 * IMPORTANT:
841 * This function assumes that all modelist entries in
842 * info->modelist are valid.
843 *
844 * NOTES:
845 * Finds best matching videomode which has an equal or greater dimension than
846 * var->xres and var->yres. If more than 1 videomode is found, will return
847 * the videomode with the highest refresh rate
848 */
9791d763
GU		 849const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
850 struct list_head *head)
1da177e4
LT		 851{
852 struct list_head *pos;
853 struct fb_modelist *modelist;
854 struct fb_videomode *mode, *best = NULL;
855 u32 diff = -1;
856
857 list_for_each(pos, head) {
858 u32 d;
859
860 modelist = list_entry(pos, struct fb_modelist, list);
861 mode = &modelist->mode;
862
863 if (mode->xres >= var->xres && mode->yres >= var->yres) {
864 d = (mode->xres - var->xres) +
865 (mode->yres - var->yres);
866 if (diff > d) {
867 diff = d;
868 best = mode;
17cc6281
AD		 869 } else if (diff == d && best &&
870 mode->refresh > best->refresh)
871 best = mode;
1da177e4
LT		 872 }
873 }
874 return best;
875}
876
877/**
8fb6567e 878 * fb_find_nearest_mode - find closest videomode
1da177e4 879 *
8fb6567e 880 * @mode: pointer to struct fb_videomode
1da177e4
LT		 881 * @head: pointer to modelist
882 *
883 * Finds best matching videomode, smaller or greater in dimension.
884 * If more than 1 videomode is found, will return the videomode with
8fb6567e 885 * the closest refresh rate.
1da177e4 886 */
9791d763
GU		 887const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
888 struct list_head *head)
1da177e4
LT		 889{
890 struct list_head *pos;
891 struct fb_modelist *modelist;
8fb6567e 892 struct fb_videomode *cmode, *best = NULL;
1da177e4
LT		 893 u32 diff = -1, diff_refresh = -1;
894
895 list_for_each(pos, head) {
896 u32 d;
897
898 modelist = list_entry(pos, struct fb_modelist, list);
8fb6567e 899 cmode = &modelist->mode;
1da177e4 900
8fb6567e
MJ		 901 d = abs(cmode->xres - mode->xres) +
902 abs(cmode->yres - mode->yres);
1da177e4
LT		 903 if (diff > d) {
904 diff = d;
e504b848 905 diff_refresh = abs(cmode->refresh - mode->refresh);
8fb6567e 906 best = cmode;
1da177e4 907 } else if (diff == d) {
8fb6567e 908 d = abs(cmode->refresh - mode->refresh);
1da177e4
LT		 909 if (diff_refresh > d) {
910 diff_refresh = d;
8fb6567e 911 best = cmode;
1da177e4
LT		 912 }
913 }
914 }
915
916 return best;
917}
918
919/**
920 * fb_match_mode - find a videomode which exactly matches the timings in var
921 * @var: pointer to struct fb_var_screeninfo
922 * @head: pointer to struct list_head of modelist
923 *
924 * RETURNS:
925 * struct fb_videomode, NULL if none found
926 */
9791d763
GU		 927const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
928 struct list_head *head)
1da177e4
LT		 929{
930 struct list_head *pos;
931 struct fb_modelist *modelist;
932 struct fb_videomode *m, mode;
933
934 fb_var_to_videomode(&mode, var);
935 list_for_each(pos, head) {
936 modelist = list_entry(pos, struct fb_modelist, list);
937 m = &modelist->mode;
938 if (fb_mode_is_equal(m, &mode))
939 return m;
940 }
941 return NULL;
942}
943
944/**
a8b19254 945 * fb_add_videomode - adds videomode entry to modelist
1da177e4
LT		 946 * @mode: videomode to add
947 * @head: struct list_head of modelist
948 *
949 * NOTES:
950 * Will only add unmatched mode entries
951 */
9791d763 952int fb_add_videomode(const struct fb_videomode *mode, struct list_head *head)
1da177e4
LT		 953{
954 struct list_head *pos;
955 struct fb_modelist *modelist;
956 struct fb_videomode *m;
957 int found = 0;
958
959 list_for_each(pos, head) {
960 modelist = list_entry(pos, struct fb_modelist, list);
961 m = &modelist->mode;
962 if (fb_mode_is_equal(m, mode)) {
963 found = 1;
964 break;
965 }
966 }
967 if (!found) {
968 modelist = kmalloc(sizeof(struct fb_modelist),
969 GFP_KERNEL);
970
971 if (!modelist)
972 return -ENOMEM;
973 modelist->mode = *mode;
974 list_add(&modelist->list, head);
975 }
976 return 0;
977}
978
979/**
a8b19254 980 * fb_delete_videomode - removed videomode entry from modelist
1da177e4
LT		 981 * @mode: videomode to remove
982 * @head: struct list_head of modelist
983 *
984 * NOTES:
985 * Will remove all matching mode entries
986 */
9791d763
GU		 987void fb_delete_videomode(const struct fb_videomode *mode,
988 struct list_head *head)
1da177e4
LT		 989{
990 struct list_head *pos, *n;
991 struct fb_modelist *modelist;
992 struct fb_videomode *m;
993
994 list_for_each_safe(pos, n, head) {
995 modelist = list_entry(pos, struct fb_modelist, list);
996 m = &modelist->mode;
997 if (fb_mode_is_equal(m, mode)) {
998 list_del(pos);
999 kfree(pos);
1000 }
1001 }
1002}
1003
1004/**
a8b19254 1005 * fb_destroy_modelist - destroy modelist
1da177e4
LT		 1006 * @head: struct list_head of modelist
1007 */
1008void fb_destroy_modelist(struct list_head *head)
1009{
1010 struct list_head *pos, *n;
1011
1012 list_for_each_safe(pos, n, head) {
1013 list_del(pos);
1014 kfree(pos);
1015 }
1016}
9953d236 1017EXPORT_SYMBOL_GPL(fb_destroy_modelist);
1da177e4
LT		 1018
1019/**
a8b19254 1020 * fb_videomode_to_modelist - convert mode array to mode list
1da177e4
LT		 1021 * @modedb: array of struct fb_videomode
1022 * @num: number of entries in array
1023 * @head: struct list_head of modelist
1024 */
9791d763 1025void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
1da177e4
LT		 1026 struct list_head *head)
1027{
1028 int i;
1029
1030 INIT_LIST_HEAD(head);
1031
1032 for (i = 0; i < num; i++) {
1033 if (fb_add_videomode(&modedb[i], head))
1034 return;
1035 }
1036}
1037
9791d763
GU		 1038const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
1039 struct list_head *head)
003cfc0c
AD		 1040{
1041 struct list_head *pos;
1042 struct fb_modelist *modelist;
9791d763 1043 const struct fb_videomode *m, *m1 = NULL, *md = NULL, *best = NULL;
003cfc0c
AD		 1044 int first = 0;
1045
1046 if (!head->prev || !head->next || list_empty(head))
1047 goto finished;
1048
1049 /* get the first detailed mode and the very first mode */
1050 list_for_each(pos, head) {
1051 modelist = list_entry(pos, struct fb_modelist, list);
1052 m = &modelist->mode;
1053
1054 if (!first) {
1055 m1 = m;
1056 first = 1;
1057 }
1058
1059 if (m->flag & FB_MODE_IS_FIRST) {
1060 md = m;
1061 break;
1062 }
1063 }
1064
1065 /* first detailed timing is preferred */
1066 if (specs->misc & FB_MISC_1ST_DETAIL) {
1067 best = md;
1068 goto finished;
1069 }
1070
1071 /* find best mode based on display width and height */
1072 if (specs->max_x && specs->max_y) {
1073 struct fb_var_screeninfo var;
1074
1075 memset(&var, 0, sizeof(struct fb_var_screeninfo));
1076 var.xres = (specs->max_x * 7200)/254;
1077 var.yres = (specs->max_y * 7200)/254;
1078 m = fb_find_best_mode(&var, head);
1079 if (m) {
1080 best = m;
1081 goto finished;
1082 }
1083 }
1084
1085 /* use first detailed mode */
1086 if (md) {
1087 best = md;
1088 goto finished;
1089 }
1090
1091 /* last resort, use the very first mode */
1092 best = m1;
1093finished:
1094 return best;
1095}
1096EXPORT_SYMBOL(fb_find_best_display);
1097
1da177e4
LT		 1098EXPORT_SYMBOL(fb_videomode_to_var);
1099EXPORT_SYMBOL(fb_var_to_videomode);
1100EXPORT_SYMBOL(fb_mode_is_equal);
1101EXPORT_SYMBOL(fb_add_videomode);
1da177e4
LT		 1102EXPORT_SYMBOL(fb_match_mode);
1103EXPORT_SYMBOL(fb_find_best_mode);
1104EXPORT_SYMBOL(fb_find_nearest_mode);
1105EXPORT_SYMBOL(fb_videomode_to_modelist);
1106EXPORT_SYMBOL(fb_find_mode);
Linux kernel - Deliverables
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