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 vesa_modes[] = {
293 	/* 0 640x350-85 VESA */
294 	{ NULL, 85, 640, 350, 31746,  96, 32, 60, 32, 64, 3,
295 	  FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA},
296 	/* 1 640x400-85 VESA */
297 	{ NULL, 85, 640, 400, 31746,  96, 32, 41, 01, 64, 3,
298 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
299 	/* 2 720x400-85 VESA */
300 	{ NULL, 85, 721, 400, 28169, 108, 36, 42, 01, 72, 3,
301 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
302 	/* 3 640x480-60 VESA */
303 	{ NULL, 60, 640, 480, 39682,  48, 16, 33, 10, 96, 2,
304 	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
305 	/* 4 640x480-72 VESA */
306 	{ NULL, 72, 640, 480, 31746, 128, 24, 29, 9, 40, 2,
307 	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
308 	/* 5 640x480-75 VESA */
309 	{ NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
310 	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
311 	/* 6 640x480-85 VESA */
312 	{ NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
313 	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
314 	/* 7 800x600-56 VESA */
315 	{ NULL, 56, 800, 600, 27777, 128, 24, 22, 01, 72, 2,
316 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
317 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
318 	/* 8 800x600-60 VESA */
319 	{ NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
320 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
321 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
322 	/* 9 800x600-72 VESA */
323 	{ NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
324 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
325 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
326 	/* 10 800x600-75 VESA */
327 	{ NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
328 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
329 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
330 	/* 11 800x600-85 VESA */
331 	{ NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
332 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
333 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
334         /* 12 1024x768i-43 VESA */
335 	{ NULL, 43, 1024, 768, 22271, 56, 8, 41, 0, 176, 8,
336 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
337 	  FB_VMODE_INTERLACED, FB_MODE_IS_VESA },
338 	/* 13 1024x768-60 VESA */
339 	{ NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
340 	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
341 	/* 14 1024x768-70 VESA */
342 	{ NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6,
343 	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
344 	/* 15 1024x768-75 VESA */
345 	{ NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
346 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
347 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
348 	/* 16 1024x768-85 VESA */
349 	{ NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
350 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
351 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
352 	/* 17 1152x864-75 VESA */
353 	{ NULL, 75, 1152, 864, 9259, 256, 64, 32, 1, 128, 3,
354 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
355 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
356 	/* 18 1280x960-60 VESA */
357 	{ NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
358 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
359 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
360 	/* 19 1280x960-85 VESA */
361 	{ NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
362 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
363 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
364 	/* 20 1280x1024-60 VESA */
365 	{ NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
366 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
367 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
368 	/* 21 1280x1024-75 VESA */
369 	{ NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
370 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
371 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
372 	/* 22 1280x1024-85 VESA */
373 	{ NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
374 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
375 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
376 	/* 23 1600x1200-60 VESA */
377 	{ NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
378 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
379 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
380 	/* 24 1600x1200-65 VESA */
381 	{ NULL, 65, 1600, 1200, 5698, 304,  64, 46, 1, 192, 3,
382 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
383 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
384 	/* 25 1600x1200-70 VESA */
385 	{ NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
386 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
387 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
388 	/* 26 1600x1200-75 VESA */
389 	{ NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
390 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
391 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
392 	/* 27 1600x1200-85 VESA */
393 	{ NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
394 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
395 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
396 	/* 28 1792x1344-60 VESA */
397 	{ NULL, 60, 1792, 1344, 4882, 328, 128, 46, 1, 200, 3,
398 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
399 	/* 29 1792x1344-75 VESA */
400 	{ NULL, 75, 1792, 1344, 3831, 352, 96, 69, 1, 216, 3,
401 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
402 	/* 30 1856x1392-60 VESA */
403 	{ NULL, 60, 1856, 1392, 4580, 352, 96, 43, 1, 224, 3,
404 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
405 	/* 31 1856x1392-75 VESA */
406 	{ NULL, 75, 1856, 1392, 3472, 352, 128, 104, 1, 224, 3,
407 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
408 	/* 32 1920x1440-60 VESA */
409 	{ NULL, 60, 1920, 1440, 4273, 344, 128, 56, 1, 200, 3,
410 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
411 	/* 33 1920x1440-75 VESA */
412 	{ NULL, 75, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3,
413 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
414 	/* 34 1920x1200-60 RB VESA */
415 	{ NULL, 60, 1920, 1200, 6493, 80, 48, 26, 3, 32, 6,
416 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
417 	/* 35 1920x1200-60 VESA */
418 	{ NULL, 60, 1920, 1200, 5174, 336, 136, 36, 3, 200, 6,
419 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
420 	/* 36 1920x1200-75 VESA */
421 	{ NULL, 75, 1920, 1200, 4077, 344, 136, 46, 3, 208, 6,
422 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
423 	/* 37 1920x1200-85 VESA */
424 	{ NULL, 85, 1920, 1200, 3555, 352, 144, 53, 3, 208, 6,
425 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
426 	/* 38 2560x1600-60 RB VESA */
427 	{ NULL, 60, 2560, 1600, 3724, 80, 48, 37, 3, 32, 6,
428 	  FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
429 	/* 39 2560x1600-60 VESA */
430 	{ NULL, 60, 2560, 1600, 2869, 472, 192, 49, 3, 280, 6,
431 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
432 	/* 40 2560x1600-75 VESA */
433 	{ NULL, 75, 2560, 1600, 2256, 488, 208, 63, 3, 280, 6,
434 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
435 	/* 41 2560x1600-85 VESA */
436 	{ NULL, 85, 2560, 1600, 1979, 488, 208, 73, 3, 280, 6,
437 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
438 	/* 42 2560x1600-120 RB VESA */
439 	{ NULL, 120, 2560, 1600, 1809, 80, 48, 85, 3, 32, 6,
440 	  FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
441 };
442 EXPORT_SYMBOL(vesa_modes);
443 
444 const struct dmt_videomode dmt_modes[DMT_SIZE] = {
445 	{ 0x01, 0x0000, 0x000000, &vesa_modes[0] },
446 	{ 0x02, 0x3119, 0x000000, &vesa_modes[1] },
447 	{ 0x03, 0x0000, 0x000000, &vesa_modes[2] },
448 	{ 0x04, 0x3140, 0x000000, &vesa_modes[3] },
449 	{ 0x05, 0x314c, 0x000000, &vesa_modes[4] },
450 	{ 0x06, 0x314f, 0x000000, &vesa_modes[5] },
451 	{ 0x07, 0x3159, 0x000000, &vesa_modes[6] },
452 	{ 0x08, 0x0000, 0x000000, &vesa_modes[7] },
453 	{ 0x09, 0x4540, 0x000000, &vesa_modes[8] },
454 	{ 0x0a, 0x454c, 0x000000, &vesa_modes[9] },
455 	{ 0x0b, 0x454f, 0x000000, &vesa_modes[10] },
456 	{ 0x0c, 0x4559, 0x000000, &vesa_modes[11] },
457 	{ 0x0d, 0x0000, 0x000000, NULL },
458 	{ 0x0e, 0x0000, 0x000000, NULL },
459 	{ 0x0f, 0x0000, 0x000000, &vesa_modes[12] },
460 	{ 0x10, 0x6140, 0x000000, &vesa_modes[13] },
461 	{ 0x11, 0x614a, 0x000000, &vesa_modes[14] },
462 	{ 0x12, 0x614f, 0x000000, &vesa_modes[15] },
463 	{ 0x13, 0x6159, 0x000000, &vesa_modes[16] },
464 	{ 0x14, 0x0000, 0x000000, NULL },
465 	{ 0x15, 0x714f, 0x000000, &vesa_modes[17] },
466 	{ 0x16, 0x0000, 0x7f1c21, NULL },
467 	{ 0x17, 0x0000, 0x7f1c28, NULL },
468 	{ 0x18, 0x0000, 0x7f1c44, NULL },
469 	{ 0x19, 0x0000, 0x7f1c62, NULL },
470 	{ 0x1a, 0x0000, 0x000000, NULL },
471 	{ 0x1b, 0x0000, 0x8f1821, NULL },
472 	{ 0x1c, 0x8100, 0x8f1828, NULL },
473 	{ 0x1d, 0x810f, 0x8f1844, NULL },
474 	{ 0x1e, 0x8119, 0x8f1862, NULL },
475 	{ 0x1f, 0x0000, 0x000000, NULL },
476 	{ 0x20, 0x8140, 0x000000, &vesa_modes[18] },
477 	{ 0x21, 0x8159, 0x000000, &vesa_modes[19] },
478 	{ 0x22, 0x0000, 0x000000, NULL },
479 	{ 0x23, 0x8180, 0x000000, &vesa_modes[20] },
480 	{ 0x24, 0x818f, 0x000000, &vesa_modes[21] },
481 	{ 0x25, 0x8199, 0x000000, &vesa_modes[22] },
482 	{ 0x26, 0x0000, 0x000000, NULL },
483 	{ 0x27, 0x0000, 0x000000, NULL },
484 	{ 0x28, 0x0000, 0x000000, NULL },
485 	{ 0x29, 0x0000, 0x0c2021, NULL },
486 	{ 0x2a, 0x9040, 0x0c2028, NULL },
487 	{ 0x2b, 0x904f, 0x0c2044, NULL },
488 	{ 0x2c, 0x9059, 0x0c2062, NULL },
489 	{ 0x2d, 0x0000, 0x000000, NULL },
490 	{ 0x2e, 0x9500, 0xc11821, NULL },
491 	{ 0x2f, 0x9500, 0xc11828, NULL },
492 	{ 0x30, 0x950f, 0xc11844, NULL },
493 	{ 0x31, 0x9519, 0xc11868, NULL },
494 	{ 0x32, 0x0000, 0x000000, NULL },
495 	{ 0x33, 0xa940, 0x000000, &vesa_modes[23] },
496 	{ 0x34, 0xa945, 0x000000, &vesa_modes[24] },
497 	{ 0x35, 0xa94a, 0x000000, &vesa_modes[25] },
498 	{ 0x36, 0xa94f, 0x000000, &vesa_modes[26] },
499 	{ 0x37, 0xa959, 0x000000, &vesa_modes[27] },
500 	{ 0x38, 0x0000, 0x000000, NULL },
501 	{ 0x39, 0x0000, 0x0c2821, NULL },
502 	{ 0x3a, 0xb300, 0x0c2828, NULL },
503 	{ 0x3b, 0xb30f, 0x0c2844, NULL },
504 	{ 0x3c, 0xb319, 0x0c2868, NULL },
505 	{ 0x3d, 0x0000, 0x000000, NULL },
506 	{ 0x3e, 0xc140, 0x000000, &vesa_modes[28] },
507 	{ 0x3f, 0xc14f, 0x000000, &vesa_modes[29] },
508 	{ 0x40, 0x0000, 0x000000, NULL},
509 	{ 0x41, 0xc940, 0x000000, &vesa_modes[30] },
510 	{ 0x42, 0xc94f, 0x000000, &vesa_modes[31] },
511 	{ 0x43, 0x0000, 0x000000, NULL },
512 	{ 0x44, 0x0000, 0x572821, &vesa_modes[34] },
513 	{ 0x45, 0xd100, 0x572828, &vesa_modes[35] },
514 	{ 0x46, 0xd10f, 0x572844, &vesa_modes[36] },
515 	{ 0x47, 0xd119, 0x572862, &vesa_modes[37] },
516 	{ 0x48, 0x0000, 0x000000, NULL },
517 	{ 0x49, 0xd140, 0x000000, &vesa_modes[32] },
518 	{ 0x4a, 0xd14f, 0x000000, &vesa_modes[33] },
519 	{ 0x4b, 0x0000, 0x000000, NULL },
520 	{ 0x4c, 0x0000, 0x1f3821, &vesa_modes[38] },
521 	{ 0x4d, 0x0000, 0x1f3828, &vesa_modes[39] },
522 	{ 0x4e, 0x0000, 0x1f3844, &vesa_modes[40] },
523 	{ 0x4f, 0x0000, 0x1f3862, &vesa_modes[41] },
524 	{ 0x50, 0x0000, 0x000000, &vesa_modes[42] },
525 };
526 EXPORT_SYMBOL(dmt_modes);
527 #endif /* CONFIG_FB_MODE_HELPERS */
528 
529 /**
530  *	fb_try_mode - test a video mode
531  *	@var: frame buffer user defined part of display
532  *	@info: frame buffer info structure
533  *	@mode: frame buffer video mode structure
534  *	@bpp: color depth in bits per pixel
535  *
536  *	Tries a video mode to test it's validity for device @info.
537  *
538  *	Returns 1 on success.
539  *
540  */
541 
fb_try_mode(struct fb_var_screeninfo * var,struct fb_info * info,const struct fb_videomode * mode,unsigned int bpp)542 static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
543 		       const struct fb_videomode *mode, unsigned int bpp)
544 {
545 	int err = 0;
546 
547 	DPRINTK("Trying mode %s %dx%d-%d@%d\n",
548 		mode->name ? mode->name : "noname",
549 		mode->xres, mode->yres, bpp, mode->refresh);
550 	var->xres = mode->xres;
551 	var->yres = mode->yres;
552 	var->xres_virtual = mode->xres;
553 	var->yres_virtual = mode->yres;
554 	var->xoffset = 0;
555 	var->yoffset = 0;
556 	var->bits_per_pixel = bpp;
557 	var->activate |= FB_ACTIVATE_TEST;
558 	var->pixclock = mode->pixclock;
559 	var->left_margin = mode->left_margin;
560 	var->right_margin = mode->right_margin;
561 	var->upper_margin = mode->upper_margin;
562 	var->lower_margin = mode->lower_margin;
563 	var->hsync_len = mode->hsync_len;
564 	var->vsync_len = mode->vsync_len;
565 	var->sync = mode->sync;
566 	var->vmode = mode->vmode;
567 	if (info->fbops->fb_check_var)
568 		err = info->fbops->fb_check_var(var, info);
569 	var->activate &= ~FB_ACTIVATE_TEST;
570 	return err;
571 }
572 
573 /**
574  * fb_find_mode - finds a valid video mode
575  * @var: frame buffer user defined part of display
576  * @info: frame buffer info structure
577  * @mode_option: string video mode to find
578  * @db: video mode database
579  * @dbsize: size of @db
580  * @default_mode: default video mode to fall back to
581  * @default_bpp: default color depth in bits per pixel
582  *
583  * Finds a suitable video mode, starting with the specified mode
584  * in @mode_option with fallback to @default_mode.  If
585  * @default_mode fails, all modes in the video mode database will
586  * be tried.
587  *
588  * Valid mode specifiers for @mode_option::
589  *
590  *     <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][p][m]
591  *
592  * or ::
593  *
594  *     <name>[-<bpp>][@<refresh>]
595  *
596  * with <xres>, <yres>, <bpp> and <refresh> decimal numbers and
597  * <name> a string.
598  *
599  * If 'M' is present after yres (and before refresh/bpp if present),
600  * the function will compute the timings using VESA(tm) Coordinated
601  * Video Timings (CVT).  If 'R' is present after 'M', will compute with
602  * reduced blanking (for flatpanels).  If 'i' or 'p' are present, compute
603  * interlaced or progressive mode.  If 'm' is present, add margins equal
604  * to 1.8% of xres rounded down to 8 pixels, and 1.8% of yres. The char
605  * 'i', 'p' and 'm' must be after 'M' and 'R'. Example::
606  *
607  *     1024x768MR-8@60m - Reduced blank with margins at 60Hz.
608  *
609  * NOTE: The passed struct @var is _not_ cleared!  This allows you
610  * to supply values for e.g. the grayscale and accel_flags fields.
611  *
612  * Returns zero for failure, 1 if using specified @mode_option,
613  * 2 if using specified @mode_option with an ignored refresh rate,
614  * 3 if default mode is used, 4 if fall back to any valid mode.
615  */
616 
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)617 int fb_find_mode(struct fb_var_screeninfo *var,
618 		 struct fb_info *info, const char *mode_option,
619 		 const struct fb_videomode *db, unsigned int dbsize,
620 		 const struct fb_videomode *default_mode,
621 		 unsigned int default_bpp)
622 {
623 	int i;
624 
625 	/* Set up defaults */
626 	if (!db) {
627 		db = modedb;
628 		dbsize = ARRAY_SIZE(modedb);
629 	}
630 
631 	if (!default_mode)
632 		default_mode = &db[0];
633 
634 	if (!default_bpp)
635 		default_bpp = 8;
636 
637 	/* Did the user specify a video mode? */
638 	if (!mode_option)
639 		mode_option = fb_mode_option;
640 	if (mode_option) {
641 		const char *name = mode_option;
642 		unsigned int namelen = strlen(name);
643 		int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
644 		unsigned int xres = 0, yres = 0, bpp = default_bpp, refresh = 0;
645 		int yres_specified = 0, cvt = 0, rb = 0;
646 		int interlace_specified = 0, interlace = 0;
647 		int margins = 0;
648 		u32 best, diff, tdiff;
649 
650 		for (i = namelen-1; i >= 0; i--) {
651 			switch (name[i]) {
652 			case '@':
653 				namelen = i;
654 				if (!refresh_specified && !bpp_specified &&
655 				    !yres_specified) {
656 					refresh = simple_strtol(&name[i+1], NULL,
657 								10);
658 					refresh_specified = 1;
659 					if (cvt || rb)
660 						cvt = 0;
661 				} else
662 					goto done;
663 				break;
664 			case '-':
665 				namelen = i;
666 				if (!bpp_specified && !yres_specified) {
667 					bpp = simple_strtol(&name[i+1], NULL,
668 							    10);
669 					bpp_specified = 1;
670 					if (cvt || rb)
671 						cvt = 0;
672 				} else
673 					goto done;
674 				break;
675 			case 'x':
676 				if (!yres_specified) {
677 					yres = simple_strtol(&name[i+1], NULL,
678 							     10);
679 					yres_specified = 1;
680 				} else
681 					goto done;
682 				break;
683 			case '0' ... '9':
684 				break;
685 			case 'M':
686 				if (!yres_specified)
687 					cvt = 1;
688 				break;
689 			case 'R':
690 				if (!cvt)
691 					rb = 1;
692 				break;
693 			case 'm':
694 				if (!cvt)
695 					margins = 1;
696 				break;
697 			case 'p':
698 				if (!cvt) {
699 					interlace = 0;
700 					interlace_specified = 1;
701 				}
702 				break;
703 			case 'i':
704 				if (!cvt) {
705 					interlace = 1;
706 					interlace_specified = 1;
707 				}
708 				break;
709 			default:
710 				goto done;
711 			}
712 		}
713 		if (i < 0 && yres_specified) {
714 			xres = simple_strtol(name, NULL, 10);
715 			res_specified = 1;
716 		}
717 done:
718 		if (cvt) {
719 			struct fb_videomode cvt_mode;
720 			int ret;
721 
722 			DPRINTK("CVT mode %dx%d@%dHz%s%s%s\n", xres, yres,
723 				(refresh) ? refresh : 60,
724 				(rb) ? " reduced blanking" : "",
725 				(margins) ? " with margins" : "",
726 				(interlace) ? " interlaced" : "");
727 
728 			memset(&cvt_mode, 0, sizeof(cvt_mode));
729 			cvt_mode.xres = xres;
730 			cvt_mode.yres = yres;
731 			cvt_mode.refresh = (refresh) ? refresh : 60;
732 
733 			if (interlace)
734 				cvt_mode.vmode |= FB_VMODE_INTERLACED;
735 			else
736 				cvt_mode.vmode &= ~FB_VMODE_INTERLACED;
737 
738 			ret = fb_find_mode_cvt(&cvt_mode, margins, rb);
739 
740 			if (!ret && !fb_try_mode(var, info, &cvt_mode, bpp)) {
741 				DPRINTK("modedb CVT: CVT mode ok\n");
742 				return 1;
743 			}
744 
745 			DPRINTK("CVT mode invalid, getting mode from database\n");
746 		}
747 
748 		DPRINTK("Trying specified video mode%s %ix%i\n",
749 			refresh_specified ? "" : " (ignoring refresh rate)",
750 			xres, yres);
751 
752 		if (!refresh_specified) {
753 			/*
754 			 * If the caller has provided a custom mode database and
755 			 * a valid monspecs structure, we look for the mode with
756 			 * the highest refresh rate.  Otherwise we play it safe
757 			 * it and try to find a mode with a refresh rate closest
758 			 * to the standard 60 Hz.
759 			 */
760 			if (db != modedb &&
761 			    info->monspecs.vfmin && info->monspecs.vfmax &&
762 			    info->monspecs.hfmin && info->monspecs.hfmax &&
763 			    info->monspecs.dclkmax) {
764 				refresh = 1000;
765 			} else {
766 				refresh = 60;
767 			}
768 		}
769 
770 		diff = -1;
771 		best = -1;
772 		for (i = 0; i < dbsize; i++) {
773 			if ((name_matches(db[i], name, namelen) ||
774 			     (res_specified && res_matches(db[i], xres, yres))) &&
775 			    !fb_try_mode(var, info, &db[i], bpp)) {
776 				const int db_interlace = (db[i].vmode &
777 					FB_VMODE_INTERLACED ? 1 : 0);
778 				int score = abs(db[i].refresh - refresh);
779 
780 				if (interlace_specified)
781 					score += abs(db_interlace - interlace);
782 
783 				if (!interlace_specified ||
784 				    db_interlace == interlace)
785 					if (refresh_specified &&
786 					    db[i].refresh == refresh)
787 						return 1;
788 
789 				if (score < diff) {
790 					diff = score;
791 					best = i;
792 				}
793 			}
794 		}
795 		if (best != -1) {
796 			fb_try_mode(var, info, &db[best], bpp);
797 			return (refresh_specified) ? 2 : 1;
798 		}
799 
800 		diff = 2 * (xres + yres);
801 		best = -1;
802 		DPRINTK("Trying best-fit modes\n");
803 		for (i = 0; i < dbsize; i++) {
804 			DPRINTK("Trying %ix%i\n", db[i].xres, db[i].yres);
805 			if (!fb_try_mode(var, info, &db[i], bpp)) {
806 				tdiff = abs(db[i].xres - xres) +
807 					abs(db[i].yres - yres);
808 
809 				/*
810 				 * Penalize modes with resolutions smaller
811 				 * than requested.
812 				 */
813 				if (xres > db[i].xres || yres > db[i].yres)
814 					tdiff += xres + yres;
815 
816 				if (diff > tdiff) {
817 					diff = tdiff;
818 					best = i;
819 				}
820 			}
821 		}
822 		if (best != -1) {
823 			fb_try_mode(var, info, &db[best], bpp);
824 			return 5;
825 		}
826 	}
827 
828 	DPRINTK("Trying default video mode\n");
829 	if (!fb_try_mode(var, info, default_mode, default_bpp))
830 		return 3;
831 
832 	DPRINTK("Trying all modes\n");
833 	for (i = 0; i < dbsize; i++)
834 		if (!fb_try_mode(var, info, &db[i], default_bpp))
835 			return 4;
836 
837 	DPRINTK("No valid mode found\n");
838 	return 0;
839 }
840 
841 /**
842  * fb_var_to_videomode - convert fb_var_screeninfo to fb_videomode
843  * @mode: pointer to struct fb_videomode
844  * @var: pointer to struct fb_var_screeninfo
845  */
fb_var_to_videomode(struct fb_videomode * mode,const struct fb_var_screeninfo * var)846 void fb_var_to_videomode(struct fb_videomode *mode,
847 			 const struct fb_var_screeninfo *var)
848 {
849 	u32 pixclock, hfreq, htotal, vtotal;
850 
851 	mode->name = NULL;
852 	mode->xres = var->xres;
853 	mode->yres = var->yres;
854 	mode->pixclock = var->pixclock;
855 	mode->hsync_len = var->hsync_len;
856 	mode->vsync_len = var->vsync_len;
857 	mode->left_margin = var->left_margin;
858 	mode->right_margin = var->right_margin;
859 	mode->upper_margin = var->upper_margin;
860 	mode->lower_margin = var->lower_margin;
861 	mode->sync = var->sync;
862 	mode->vmode = var->vmode & FB_VMODE_MASK;
863 	mode->flag = FB_MODE_IS_FROM_VAR;
864 	mode->refresh = 0;
865 
866 	if (!var->pixclock)
867 		return;
868 
869 	pixclock = PICOS2KHZ(var->pixclock) * 1000;
870 
871 	htotal = var->xres + var->right_margin + var->hsync_len +
872 		var->left_margin;
873 	vtotal = var->yres + var->lower_margin + var->vsync_len +
874 		var->upper_margin;
875 
876 	if (var->vmode & FB_VMODE_INTERLACED)
877 		vtotal /= 2;
878 	if (var->vmode & FB_VMODE_DOUBLE)
879 		vtotal *= 2;
880 
881 	if (!htotal || !vtotal)
882 		return;
883 
884 	hfreq = pixclock/htotal;
885 	mode->refresh = hfreq/vtotal;
886 }
887 
888 /**
889  * fb_videomode_to_var - convert fb_videomode to fb_var_screeninfo
890  * @var: pointer to struct fb_var_screeninfo
891  * @mode: pointer to struct fb_videomode
892  */
fb_videomode_to_var(struct fb_var_screeninfo * var,const struct fb_videomode * mode)893 void fb_videomode_to_var(struct fb_var_screeninfo *var,
894 			 const struct fb_videomode *mode)
895 {
896 	var->xres = mode->xres;
897 	var->yres = mode->yres;
898 	var->xres_virtual = mode->xres;
899 	var->yres_virtual = mode->yres;
900 	var->xoffset = 0;
901 	var->yoffset = 0;
902 	var->pixclock = mode->pixclock;
903 	var->left_margin = mode->left_margin;
904 	var->right_margin = mode->right_margin;
905 	var->upper_margin = mode->upper_margin;
906 	var->lower_margin = mode->lower_margin;
907 	var->hsync_len = mode->hsync_len;
908 	var->vsync_len = mode->vsync_len;
909 	var->sync = mode->sync;
910 	var->vmode = mode->vmode & FB_VMODE_MASK;
911 }
912 
913 /**
914  * fb_mode_is_equal - compare 2 videomodes
915  * @mode1: first videomode
916  * @mode2: second videomode
917  *
918  * RETURNS:
919  * 1 if equal, 0 if not
920  */
fb_mode_is_equal(const struct fb_videomode * mode1,const struct fb_videomode * mode2)921 int fb_mode_is_equal(const struct fb_videomode *mode1,
922 		     const struct fb_videomode *mode2)
923 {
924 	return (mode1->xres         == mode2->xres &&
925 		mode1->yres         == mode2->yres &&
926 		mode1->pixclock     == mode2->pixclock &&
927 		mode1->hsync_len    == mode2->hsync_len &&
928 		mode1->vsync_len    == mode2->vsync_len &&
929 		mode1->left_margin  == mode2->left_margin &&
930 		mode1->right_margin == mode2->right_margin &&
931 		mode1->upper_margin == mode2->upper_margin &&
932 		mode1->lower_margin == mode2->lower_margin &&
933 		mode1->sync         == mode2->sync &&
934 		mode1->vmode        == mode2->vmode);
935 }
936 
937 /**
938  * fb_find_best_mode - find best matching videomode
939  * @var: pointer to struct fb_var_screeninfo
940  * @head: pointer to struct list_head of modelist
941  *
942  * RETURNS:
943  * struct fb_videomode, NULL if none found
944  *
945  * IMPORTANT:
946  * This function assumes that all modelist entries in
947  * info->modelist are valid.
948  *
949  * NOTES:
950  * Finds best matching videomode which has an equal or greater dimension than
951  * var->xres and var->yres.  If more than 1 videomode is found, will return
952  * the videomode with the highest refresh rate
953  */
fb_find_best_mode(const struct fb_var_screeninfo * var,struct list_head * head)954 const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
955 					     struct list_head *head)
956 {
957 	struct list_head *pos;
958 	struct fb_modelist *modelist;
959 	struct fb_videomode *mode, *best = NULL;
960 	u32 diff = -1;
961 
962 	list_for_each(pos, head) {
963 		u32 d;
964 
965 		modelist = list_entry(pos, struct fb_modelist, list);
966 		mode = &modelist->mode;
967 
968 		if (mode->xres >= var->xres && mode->yres >= var->yres) {
969 			d = (mode->xres - var->xres) +
970 				(mode->yres - var->yres);
971 			if (diff > d) {
972 				diff = d;
973 				best = mode;
974 			} else if (diff == d && best &&
975 				   mode->refresh > best->refresh)
976 				best = mode;
977 		}
978 	}
979 	return best;
980 }
981 
982 /**
983  * fb_find_nearest_mode - find closest videomode
984  *
985  * @mode: pointer to struct fb_videomode
986  * @head: pointer to modelist
987  *
988  * Finds best matching videomode, smaller or greater in dimension.
989  * If more than 1 videomode is found, will return the videomode with
990  * the closest refresh rate.
991  */
fb_find_nearest_mode(const struct fb_videomode * mode,struct list_head * head)992 const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
993 					        struct list_head *head)
994 {
995 	struct list_head *pos;
996 	struct fb_modelist *modelist;
997 	struct fb_videomode *cmode, *best = NULL;
998 	u32 diff = -1, diff_refresh = -1;
999 
1000 	list_for_each(pos, head) {
1001 		u32 d;
1002 
1003 		modelist = list_entry(pos, struct fb_modelist, list);
1004 		cmode = &modelist->mode;
1005 
1006 		d = abs(cmode->xres - mode->xres) +
1007 			abs(cmode->yres - mode->yres);
1008 		if (diff > d) {
1009 			diff = d;
1010 			diff_refresh = abs(cmode->refresh - mode->refresh);
1011 			best = cmode;
1012 		} else if (diff == d) {
1013 			d = abs(cmode->refresh - mode->refresh);
1014 			if (diff_refresh > d) {
1015 				diff_refresh = d;
1016 				best = cmode;
1017 			}
1018 		}
1019 	}
1020 
1021 	return best;
1022 }
1023 
1024 /**
1025  * fb_match_mode - find a videomode which exactly matches the timings in var
1026  * @var: pointer to struct fb_var_screeninfo
1027  * @head: pointer to struct list_head of modelist
1028  *
1029  * RETURNS:
1030  * struct fb_videomode, NULL if none found
1031  */
fb_match_mode(const struct fb_var_screeninfo * var,struct list_head * head)1032 const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
1033 					 struct list_head *head)
1034 {
1035 	struct list_head *pos;
1036 	struct fb_modelist *modelist;
1037 	struct fb_videomode *m, mode;
1038 
1039 	fb_var_to_videomode(&mode, var);
1040 	list_for_each(pos, head) {
1041 		modelist = list_entry(pos, struct fb_modelist, list);
1042 		m = &modelist->mode;
1043 		if (fb_mode_is_equal(m, &mode))
1044 			return m;
1045 	}
1046 	return NULL;
1047 }
1048 
1049 /**
1050  * fb_add_videomode - adds videomode entry to modelist
1051  * @mode: videomode to add
1052  * @head: struct list_head of modelist
1053  *
1054  * NOTES:
1055  * Will only add unmatched mode entries
1056  */
fb_add_videomode(const struct fb_videomode * mode,struct list_head * head)1057 int fb_add_videomode(const struct fb_videomode *mode, struct list_head *head)
1058 {
1059 	struct list_head *pos;
1060 	struct fb_modelist *modelist;
1061 	struct fb_videomode *m;
1062 	int found = 0;
1063 
1064 	list_for_each(pos, head) {
1065 		modelist = list_entry(pos, struct fb_modelist, list);
1066 		m = &modelist->mode;
1067 		if (fb_mode_is_equal(m, mode)) {
1068 			found = 1;
1069 			break;
1070 		}
1071 	}
1072 	if (!found) {
1073 		modelist = kmalloc(sizeof(struct fb_modelist),
1074 						  GFP_KERNEL);
1075 
1076 		if (!modelist)
1077 			return -ENOMEM;
1078 		modelist->mode = *mode;
1079 		list_add(&modelist->list, head);
1080 	}
1081 	return 0;
1082 }
1083 
1084 /**
1085  * fb_delete_videomode - removed videomode entry from modelist
1086  * @mode: videomode to remove
1087  * @head: struct list_head of modelist
1088  *
1089  * NOTES:
1090  * Will remove all matching mode entries
1091  */
fb_delete_videomode(const struct fb_videomode * mode,struct list_head * head)1092 void fb_delete_videomode(const struct fb_videomode *mode,
1093 			 struct list_head *head)
1094 {
1095 	struct list_head *pos, *n;
1096 	struct fb_modelist *modelist;
1097 	struct fb_videomode *m;
1098 
1099 	list_for_each_safe(pos, n, head) {
1100 		modelist = list_entry(pos, struct fb_modelist, list);
1101 		m = &modelist->mode;
1102 		if (fb_mode_is_equal(m, mode)) {
1103 			list_del(pos);
1104 			kfree(pos);
1105 		}
1106 	}
1107 }
1108 
1109 /**
1110  * fb_destroy_modelist - destroy modelist
1111  * @head: struct list_head of modelist
1112  */
fb_destroy_modelist(struct list_head * head)1113 void fb_destroy_modelist(struct list_head *head)
1114 {
1115 	struct list_head *pos, *n;
1116 
1117 	list_for_each_safe(pos, n, head) {
1118 		list_del(pos);
1119 		kfree(pos);
1120 	}
1121 }
1122 EXPORT_SYMBOL_GPL(fb_destroy_modelist);
1123 
1124 /**
1125  * fb_videomode_to_modelist - convert mode array to mode list
1126  * @modedb: array of struct fb_videomode
1127  * @num: number of entries in array
1128  * @head: struct list_head of modelist
1129  */
fb_videomode_to_modelist(const struct fb_videomode * modedb,int num,struct list_head * head)1130 void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
1131 			      struct list_head *head)
1132 {
1133 	int i;
1134 
1135 	INIT_LIST_HEAD(head);
1136 
1137 	for (i = 0; i < num; i++) {
1138 		if (fb_add_videomode(&modedb[i], head))
1139 			return;
1140 	}
1141 }
1142 
fb_find_best_display(const struct fb_monspecs * specs,struct list_head * head)1143 const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
1144 					        struct list_head *head)
1145 {
1146 	struct list_head *pos;
1147 	struct fb_modelist *modelist;
1148 	const struct fb_videomode *m, *m1 = NULL, *md = NULL, *best = NULL;
1149 	int first = 0;
1150 
1151 	if (!head->prev || !head->next || list_empty(head))
1152 		goto finished;
1153 
1154 	/* get the first detailed mode and the very first mode */
1155 	list_for_each(pos, head) {
1156 		modelist = list_entry(pos, struct fb_modelist, list);
1157 		m = &modelist->mode;
1158 
1159 		if (!first) {
1160 			m1 = m;
1161 			first = 1;
1162 		}
1163 
1164 		if (m->flag & FB_MODE_IS_FIRST) {
1165  			md = m;
1166 			break;
1167 		}
1168 	}
1169 
1170 	/* first detailed timing is preferred */
1171 	if (specs->misc & FB_MISC_1ST_DETAIL) {
1172 		best = md;
1173 		goto finished;
1174 	}
1175 
1176 	/* find best mode based on display width and height */
1177 	if (specs->max_x && specs->max_y) {
1178 		struct fb_var_screeninfo var;
1179 
1180 		memset(&var, 0, sizeof(struct fb_var_screeninfo));
1181 		var.xres = (specs->max_x * 7200)/254;
1182 		var.yres = (specs->max_y * 7200)/254;
1183 		m = fb_find_best_mode(&var, head);
1184 		if (m) {
1185 			best = m;
1186 			goto finished;
1187 		}
1188 	}
1189 
1190 	/* use first detailed mode */
1191 	if (md) {
1192 		best = md;
1193 		goto finished;
1194 	}
1195 
1196 	/* last resort, use the very first mode */
1197 	best = m1;
1198 finished:
1199 	return best;
1200 }
1201 EXPORT_SYMBOL(fb_find_best_display);
1202 
1203 EXPORT_SYMBOL(fb_videomode_to_var);
1204 EXPORT_SYMBOL(fb_var_to_videomode);
1205 EXPORT_SYMBOL(fb_mode_is_equal);
1206 EXPORT_SYMBOL(fb_add_videomode);
1207 EXPORT_SYMBOL(fb_match_mode);
1208 EXPORT_SYMBOL(fb_find_best_mode);
1209 EXPORT_SYMBOL(fb_find_nearest_mode);
1210 EXPORT_SYMBOL(fb_videomode_to_modelist);
1211 EXPORT_SYMBOL(fb_find_mode);
1212 EXPORT_SYMBOL(fb_find_mode_cvt);
1213