xref: /openbmc/linux/drivers/video/fbdev/core/modedb.c (revision 1520081a)
1 /*
2  *  linux/drivers/video/modedb.c -- Standard video mode database management
3  *
4  *	Copyright (C) 1999 Geert Uytterhoeven
5  *
6  *	2001 - Documented with DocBook
7  *	- Brad Douglas <brad@neruo.com>
8  *
9  *  This file is subject to the terms and conditions of the GNU General Public
10  *  License. See the file COPYING in the main directory of this archive for
11  *  more details.
12  */
13 
14 #include <linux/module.h>
15 #include <linux/slab.h>
16 #include <linux/fb.h>
17 #include <linux/kernel.h>
18 
19 #undef DEBUG
20 
21 #define name_matches(v, s, l) \
22     ((v).name && !strncmp((s), (v).name, (l)) && strlen((v).name) == (l))
23 #define res_matches(v, x, y) \
24     ((v).xres == (x) && (v).yres == (y))
25 
26 #ifdef DEBUG
27 #define DPRINTK(fmt, args...)	printk("modedb %s: " fmt, __func__ , ## args)
28 #else
29 #define DPRINTK(fmt, args...)
30 #endif
31 
32 /*
33  *  Standard video mode definitions (taken from XFree86)
34  */
35 
36 static const struct fb_videomode modedb[] = {
37 
38 	/* 640x400 @ 70 Hz, 31.5 kHz hsync */
39 	{ NULL, 70, 640, 400, 39721, 40, 24, 39, 9, 96, 2, 0,
40 		FB_VMODE_NONINTERLACED },
41 
42 	/* 640x480 @ 60 Hz, 31.5 kHz hsync */
43 	{ NULL, 60, 640, 480, 39721, 40, 24, 32, 11, 96, 2,	0,
44 		FB_VMODE_NONINTERLACED },
45 
46 	/* 800x600 @ 56 Hz, 35.15 kHz hsync */
47 	{ NULL, 56, 800, 600, 27777, 128, 24, 22, 1, 72, 2,	0,
48 		FB_VMODE_NONINTERLACED },
49 
50 	/* 1024x768 @ 87 Hz interlaced, 35.5 kHz hsync */
51 	{ NULL, 87, 1024, 768, 22271, 56, 24, 33, 8, 160, 8, 0,
52 		FB_VMODE_INTERLACED },
53 
54 	/* 640x400 @ 85 Hz, 37.86 kHz hsync */
55 	{ NULL, 85, 640, 400, 31746, 96, 32, 41, 1, 64, 3,
56 		FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED },
57 
58 	/* 640x480 @ 72 Hz, 36.5 kHz hsync */
59 	{ NULL, 72, 640, 480, 31746, 144, 40, 30, 8, 40, 3, 0,
60 		FB_VMODE_NONINTERLACED },
61 
62 	/* 640x480 @ 75 Hz, 37.50 kHz hsync */
63 	{ NULL, 75, 640, 480, 31746, 120, 16, 16, 1, 64, 3,	0,
64 		FB_VMODE_NONINTERLACED },
65 
66 	/* 800x600 @ 60 Hz, 37.8 kHz hsync */
67 	{ NULL, 60, 800, 600, 25000, 88, 40, 23, 1, 128, 4,
68 		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
69 		FB_VMODE_NONINTERLACED },
70 
71 	/* 640x480 @ 85 Hz, 43.27 kHz hsync */
72 	{ NULL, 85, 640, 480, 27777, 80, 56, 25, 1, 56, 3, 0,
73 		FB_VMODE_NONINTERLACED },
74 
75 	/* 1152x864 @ 89 Hz interlaced, 44 kHz hsync */
76 	{ NULL, 89, 1152, 864, 15384, 96, 16, 110, 1, 216, 10, 0,
77 		FB_VMODE_INTERLACED },
78 	/* 800x600 @ 72 Hz, 48.0 kHz hsync */
79 	{ NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
80 		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
81 		FB_VMODE_NONINTERLACED },
82 
83 	/* 1024x768 @ 60 Hz, 48.4 kHz hsync */
84 	{ NULL, 60, 1024, 768, 15384, 168, 8, 29, 3, 144, 6, 0,
85 		FB_VMODE_NONINTERLACED },
86 
87 	/* 640x480 @ 100 Hz, 53.01 kHz hsync */
88 	{ NULL, 100, 640, 480, 21834, 96, 32, 36, 8, 96, 6,	0,
89 		FB_VMODE_NONINTERLACED },
90 
91 	/* 1152x864 @ 60 Hz, 53.5 kHz hsync */
92 	{ NULL, 60, 1152, 864, 11123, 208, 64, 16, 4, 256, 8, 0,
93 		FB_VMODE_NONINTERLACED },
94 
95 	/* 800x600 @ 85 Hz, 55.84 kHz hsync */
96 	{ NULL, 85, 800, 600, 16460, 160, 64, 36, 16, 64, 5, 0,
97 		FB_VMODE_NONINTERLACED },
98 
99 	/* 1024x768 @ 70 Hz, 56.5 kHz hsync */
100 	{ NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6, 0,
101 		FB_VMODE_NONINTERLACED },
102 
103 	/* 1280x1024 @ 87 Hz interlaced, 51 kHz hsync */
104 	{ NULL, 87, 1280, 1024, 12500, 56, 16, 128, 1, 216, 12,	0,
105 		FB_VMODE_INTERLACED },
106 
107 	/* 800x600 @ 100 Hz, 64.02 kHz hsync */
108 	{ NULL, 100, 800, 600, 14357, 160, 64, 30, 4, 64, 6, 0,
109 		FB_VMODE_NONINTERLACED },
110 
111 	/* 1024x768 @ 76 Hz, 62.5 kHz hsync */
112 	{ NULL, 76, 1024, 768, 11764, 208, 8, 36, 16, 120, 3, 0,
113 		FB_VMODE_NONINTERLACED },
114 
115 	/* 1152x864 @ 70 Hz, 62.4 kHz hsync */
116 	{ NULL, 70, 1152, 864, 10869, 106, 56, 20, 1, 160, 10, 0,
117 		FB_VMODE_NONINTERLACED },
118 
119 	/* 1280x1024 @ 61 Hz, 64.2 kHz hsync */
120 	{ NULL, 61, 1280, 1024, 9090, 200, 48, 26, 1, 184, 3, 0,
121 		FB_VMODE_NONINTERLACED },
122 
123 	/* 1400x1050 @ 60Hz, 63.9 kHz hsync */
124 	{ NULL, 60, 1400, 1050, 9259, 136, 40, 13, 1, 112, 3, 0,
125 		FB_VMODE_NONINTERLACED },
126 
127 	/* 1400x1050 @ 75,107 Hz, 82,392 kHz +hsync +vsync*/
128 	{ NULL, 75, 1400, 1050, 7190, 120, 56, 23, 10, 112, 13,
129 		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
130 		FB_VMODE_NONINTERLACED },
131 
132 	/* 1400x1050 @ 60 Hz, ? kHz +hsync +vsync*/
133 	{ NULL, 60, 1400, 1050, 9259, 128, 40, 12, 0, 112, 3,
134 		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
135 		FB_VMODE_NONINTERLACED },
136 
137 	/* 1024x768 @ 85 Hz, 70.24 kHz hsync */
138 	{ NULL, 85, 1024, 768, 10111, 192, 32, 34, 14, 160, 6, 0,
139 		FB_VMODE_NONINTERLACED },
140 
141 	/* 1152x864 @ 78 Hz, 70.8 kHz hsync */
142 	{ NULL, 78, 1152, 864, 9090, 228, 88, 32, 0, 84, 12, 0,
143 		FB_VMODE_NONINTERLACED },
144 
145 	/* 1280x1024 @ 70 Hz, 74.59 kHz hsync */
146 	{ NULL, 70, 1280, 1024, 7905, 224, 32, 28, 8, 160, 8, 0,
147 		FB_VMODE_NONINTERLACED },
148 
149 	/* 1600x1200 @ 60Hz, 75.00 kHz hsync */
150 	{ NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
151 		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
152 		FB_VMODE_NONINTERLACED },
153 
154 	/* 1152x864 @ 84 Hz, 76.0 kHz hsync */
155 	{ NULL, 84, 1152, 864, 7407, 184, 312, 32, 0, 128, 12, 0,
156 		FB_VMODE_NONINTERLACED },
157 
158 	/* 1280x1024 @ 74 Hz, 78.85 kHz hsync */
159 	{ NULL, 74, 1280, 1024, 7407, 256, 32, 34, 3, 144, 3, 0,
160 		FB_VMODE_NONINTERLACED },
161 
162 	/* 1024x768 @ 100Hz, 80.21 kHz hsync */
163 	{ NULL, 100, 1024, 768, 8658, 192, 32, 21, 3, 192, 10, 0,
164 		FB_VMODE_NONINTERLACED },
165 
166 	/* 1280x1024 @ 76 Hz, 81.13 kHz hsync */
167 	{ NULL, 76, 1280, 1024, 7407, 248, 32, 34, 3, 104, 3, 0,
168 		FB_VMODE_NONINTERLACED },
169 
170 	/* 1600x1200 @ 70 Hz, 87.50 kHz hsync */
171 	{ NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3, 0,
172 		FB_VMODE_NONINTERLACED },
173 
174 	/* 1152x864 @ 100 Hz, 89.62 kHz hsync */
175 	{ NULL, 100, 1152, 864, 7264, 224, 32, 17, 2, 128, 19, 0,
176 		FB_VMODE_NONINTERLACED },
177 
178 	/* 1280x1024 @ 85 Hz, 91.15 kHz hsync */
179 	{ NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
180 		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
181 		FB_VMODE_NONINTERLACED },
182 
183 	/* 1600x1200 @ 75 Hz, 93.75 kHz hsync */
184 	{ NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
185 		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
186 		FB_VMODE_NONINTERLACED },
187 
188 	/* 1680x1050 @ 60 Hz, 65.191 kHz hsync */
189 	{ NULL, 60, 1680, 1050, 6848, 280, 104, 30, 3, 176, 6,
190 		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
191 		FB_VMODE_NONINTERLACED },
192 
193 	/* 1600x1200 @ 85 Hz, 105.77 kHz hsync */
194 	{ NULL, 85, 1600, 1200, 4545, 272, 16, 37, 4, 192, 3,
195 		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
196 		FB_VMODE_NONINTERLACED },
197 
198 	/* 1280x1024 @ 100 Hz, 107.16 kHz hsync */
199 	{ NULL, 100, 1280, 1024, 5502, 256, 32, 26, 7, 128, 15, 0,
200 		FB_VMODE_NONINTERLACED },
201 
202 	/* 1800x1440 @ 64Hz, 96.15 kHz hsync  */
203 	{ NULL, 64, 1800, 1440, 4347, 304, 96, 46, 1, 192, 3,
204 		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
205 		FB_VMODE_NONINTERLACED },
206 
207 	/* 1800x1440 @ 70Hz, 104.52 kHz hsync  */
208 	{ NULL, 70, 1800, 1440, 4000, 304, 96, 46, 1, 192, 3,
209 		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
210 		FB_VMODE_NONINTERLACED },
211 
212 	/* 512x384 @ 78 Hz, 31.50 kHz hsync */
213 	{ NULL, 78, 512, 384, 49603, 48, 16, 16, 1, 64, 3, 0,
214 		FB_VMODE_NONINTERLACED },
215 
216 	/* 512x384 @ 85 Hz, 34.38 kHz hsync */
217 	{ NULL, 85, 512, 384, 45454, 48, 16, 16, 1, 64, 3, 0,
218 		FB_VMODE_NONINTERLACED },
219 
220 	/* 320x200 @ 70 Hz, 31.5 kHz hsync, 8:5 aspect ratio */
221 	{ NULL, 70, 320, 200, 79440, 16, 16, 20, 4, 48, 1, 0,
222 		FB_VMODE_DOUBLE },
223 
224 	/* 320x240 @ 60 Hz, 31.5 kHz hsync, 4:3 aspect ratio */
225 	{ NULL, 60, 320, 240, 79440, 16, 16, 16, 5, 48, 1, 0,
226 		FB_VMODE_DOUBLE },
227 
228 	/* 320x240 @ 72 Hz, 36.5 kHz hsync */
229 	{ NULL, 72, 320, 240, 63492, 16, 16, 16, 4, 48, 2, 0,
230 		FB_VMODE_DOUBLE },
231 
232 	/* 400x300 @ 56 Hz, 35.2 kHz hsync, 4:3 aspect ratio */
233 	{ NULL, 56, 400, 300, 55555, 64, 16, 10, 1, 32, 1, 0,
234 		FB_VMODE_DOUBLE },
235 
236 	/* 400x300 @ 60 Hz, 37.8 kHz hsync */
237 	{ NULL, 60, 400, 300, 50000, 48, 16, 11, 1, 64, 2, 0,
238 		FB_VMODE_DOUBLE },
239 
240 	/* 400x300 @ 72 Hz, 48.0 kHz hsync */
241 	{ NULL, 72, 400, 300, 40000, 32, 24, 11, 19, 64, 3,	0,
242 		FB_VMODE_DOUBLE },
243 
244 	/* 480x300 @ 56 Hz, 35.2 kHz hsync, 8:5 aspect ratio */
245 	{ NULL, 56, 480, 300, 46176, 80, 16, 10, 1, 40, 1, 0,
246 		FB_VMODE_DOUBLE },
247 
248 	/* 480x300 @ 60 Hz, 37.8 kHz hsync */
249 	{ NULL, 60, 480, 300, 41858, 56, 16, 11, 1, 80, 2, 0,
250 		FB_VMODE_DOUBLE },
251 
252 	/* 480x300 @ 63 Hz, 39.6 kHz hsync */
253 	{ NULL, 63, 480, 300, 40000, 56, 16, 11, 1, 80, 2, 0,
254 		FB_VMODE_DOUBLE },
255 
256 	/* 480x300 @ 72 Hz, 48.0 kHz hsync */
257 	{ NULL, 72, 480, 300, 33386, 40, 24, 11, 19, 80, 3, 0,
258 		FB_VMODE_DOUBLE },
259 
260 	/* 1920x1080 @ 60 Hz, 67.3 kHz hsync */
261 	{ NULL, 60, 1920, 1080, 6734, 148, 88, 36, 4, 44, 5, 0,
262 		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
263 		FB_VMODE_NONINTERLACED },
264 
265 	/* 1920x1200 @ 60 Hz, 74.5 Khz hsync */
266 	{ NULL, 60, 1920, 1200, 5177, 128, 336, 1, 38, 208, 3,
267 		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
268 		FB_VMODE_NONINTERLACED },
269 
270 	/* 1152x768, 60 Hz, PowerBook G4 Titanium I and II */
271 	{ NULL, 60, 1152, 768, 14047, 158, 26, 29, 3, 136, 6,
272 		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
273 		FB_VMODE_NONINTERLACED },
274 
275 	/* 1366x768, 60 Hz, 47.403 kHz hsync, WXGA 16:9 aspect ratio */
276 	{ NULL, 60, 1366, 768, 13806, 120, 10, 14, 3, 32, 5, 0,
277 		FB_VMODE_NONINTERLACED },
278 
279 	/* 1280x800, 60 Hz, 47.403 kHz hsync, WXGA 16:10 aspect ratio */
280 	{ NULL, 60, 1280, 800, 12048, 200, 64, 24, 1, 136, 3, 0,
281 		FB_VMODE_NONINTERLACED },
282 
283 	/* 720x576i @ 50 Hz, 15.625 kHz hsync (PAL RGB) */
284 	{ NULL, 50, 720, 576, 74074, 64, 16, 39, 5, 64, 5, 0,
285 		FB_VMODE_INTERLACED },
286 
287 	/* 800x520i @ 50 Hz, 15.625 kHz hsync (PAL RGB) */
288 	{ NULL, 50, 800, 520, 58823, 144, 64, 72, 28, 80, 5, 0,
289 		FB_VMODE_INTERLACED },
290 
291 	/* 864x480 @ 60 Hz, 35.15 kHz hsync */
292 	{ NULL, 60, 864, 480, 27777, 1, 1, 1, 1, 0, 0,
293 		0, FB_VMODE_NONINTERLACED },
294 };
295 
296 #ifdef CONFIG_FB_MODE_HELPERS
297 const struct fb_videomode vesa_modes[] = {
298 	/* 0 640x350-85 VESA */
299 	{ NULL, 85, 640, 350, 31746,  96, 32, 60, 32, 64, 3,
300 	  FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA},
301 	/* 1 640x400-85 VESA */
302 	{ NULL, 85, 640, 400, 31746,  96, 32, 41, 01, 64, 3,
303 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
304 	/* 2 720x400-85 VESA */
305 	{ NULL, 85, 721, 400, 28169, 108, 36, 42, 01, 72, 3,
306 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
307 	/* 3 640x480-60 VESA */
308 	{ NULL, 60, 640, 480, 39682,  48, 16, 33, 10, 96, 2,
309 	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
310 	/* 4 640x480-72 VESA */
311 	{ NULL, 72, 640, 480, 31746, 128, 24, 29, 9, 40, 2,
312 	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
313 	/* 5 640x480-75 VESA */
314 	{ NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
315 	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
316 	/* 6 640x480-85 VESA */
317 	{ NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
318 	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
319 	/* 7 800x600-56 VESA */
320 	{ NULL, 56, 800, 600, 27777, 128, 24, 22, 01, 72, 2,
321 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
322 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
323 	/* 8 800x600-60 VESA */
324 	{ NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
325 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
326 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
327 	/* 9 800x600-72 VESA */
328 	{ NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
329 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
330 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
331 	/* 10 800x600-75 VESA */
332 	{ NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
333 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
334 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
335 	/* 11 800x600-85 VESA */
336 	{ NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
337 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
338 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
339         /* 12 1024x768i-43 VESA */
340 	{ NULL, 43, 1024, 768, 22271, 56, 8, 41, 0, 176, 8,
341 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
342 	  FB_VMODE_INTERLACED, FB_MODE_IS_VESA },
343 	/* 13 1024x768-60 VESA */
344 	{ NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
345 	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
346 	/* 14 1024x768-70 VESA */
347 	{ NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6,
348 	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
349 	/* 15 1024x768-75 VESA */
350 	{ NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
351 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
352 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
353 	/* 16 1024x768-85 VESA */
354 	{ NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
355 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
356 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
357 	/* 17 1152x864-75 VESA */
358 	{ NULL, 75, 1152, 864, 9259, 256, 64, 32, 1, 128, 3,
359 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
360 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
361 	/* 18 1280x960-60 VESA */
362 	{ NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
363 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
364 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
365 	/* 19 1280x960-85 VESA */
366 	{ NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
367 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
368 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
369 	/* 20 1280x1024-60 VESA */
370 	{ NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
371 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
372 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
373 	/* 21 1280x1024-75 VESA */
374 	{ NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
375 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
376 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
377 	/* 22 1280x1024-85 VESA */
378 	{ NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
379 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
380 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
381 	/* 23 1600x1200-60 VESA */
382 	{ NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
383 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
384 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
385 	/* 24 1600x1200-65 VESA */
386 	{ NULL, 65, 1600, 1200, 5698, 304,  64, 46, 1, 192, 3,
387 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
388 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
389 	/* 25 1600x1200-70 VESA */
390 	{ NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
391 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
392 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
393 	/* 26 1600x1200-75 VESA */
394 	{ NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
395 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
396 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
397 	/* 27 1600x1200-85 VESA */
398 	{ NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
399 	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
400 	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
401 	/* 28 1792x1344-60 VESA */
402 	{ NULL, 60, 1792, 1344, 4882, 328, 128, 46, 1, 200, 3,
403 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
404 	/* 29 1792x1344-75 VESA */
405 	{ NULL, 75, 1792, 1344, 3831, 352, 96, 69, 1, 216, 3,
406 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
407 	/* 30 1856x1392-60 VESA */
408 	{ NULL, 60, 1856, 1392, 4580, 352, 96, 43, 1, 224, 3,
409 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
410 	/* 31 1856x1392-75 VESA */
411 	{ NULL, 75, 1856, 1392, 3472, 352, 128, 104, 1, 224, 3,
412 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
413 	/* 32 1920x1440-60 VESA */
414 	{ NULL, 60, 1920, 1440, 4273, 344, 128, 56, 1, 200, 3,
415 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
416 	/* 33 1920x1440-75 VESA */
417 	{ NULL, 75, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3,
418 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
419 	/* 34 1920x1200-60 RB VESA */
420 	{ NULL, 60, 1920, 1200, 6493, 80, 48, 26, 3, 32, 6,
421 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
422 	/* 35 1920x1200-60 VESA */
423 	{ NULL, 60, 1920, 1200, 5174, 336, 136, 36, 3, 200, 6,
424 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
425 	/* 36 1920x1200-75 VESA */
426 	{ NULL, 75, 1920, 1200, 4077, 344, 136, 46, 3, 208, 6,
427 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
428 	/* 37 1920x1200-85 VESA */
429 	{ NULL, 85, 1920, 1200, 3555, 352, 144, 53, 3, 208, 6,
430 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
431 	/* 38 2560x1600-60 RB VESA */
432 	{ NULL, 60, 2560, 1600, 3724, 80, 48, 37, 3, 32, 6,
433 	  FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
434 	/* 39 2560x1600-60 VESA */
435 	{ NULL, 60, 2560, 1600, 2869, 472, 192, 49, 3, 280, 6,
436 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
437 	/* 40 2560x1600-75 VESA */
438 	{ NULL, 75, 2560, 1600, 2256, 488, 208, 63, 3, 280, 6,
439 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
440 	/* 41 2560x1600-85 VESA */
441 	{ NULL, 85, 2560, 1600, 1979, 488, 208, 73, 3, 280, 6,
442 	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
443 	/* 42 2560x1600-120 RB VESA */
444 	{ NULL, 120, 2560, 1600, 1809, 80, 48, 85, 3, 32, 6,
445 	  FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
446 };
447 EXPORT_SYMBOL(vesa_modes);
448 
449 const struct dmt_videomode dmt_modes[DMT_SIZE] = {
450 	{ 0x01, 0x0000, 0x000000, &vesa_modes[0] },
451 	{ 0x02, 0x3119, 0x000000, &vesa_modes[1] },
452 	{ 0x03, 0x0000, 0x000000, &vesa_modes[2] },
453 	{ 0x04, 0x3140, 0x000000, &vesa_modes[3] },
454 	{ 0x05, 0x314c, 0x000000, &vesa_modes[4] },
455 	{ 0x06, 0x314f, 0x000000, &vesa_modes[5] },
456 	{ 0x07, 0x3159, 0x000000, &vesa_modes[6] },
457 	{ 0x08, 0x0000, 0x000000, &vesa_modes[7] },
458 	{ 0x09, 0x4540, 0x000000, &vesa_modes[8] },
459 	{ 0x0a, 0x454c, 0x000000, &vesa_modes[9] },
460 	{ 0x0b, 0x454f, 0x000000, &vesa_modes[10] },
461 	{ 0x0c, 0x4559, 0x000000, &vesa_modes[11] },
462 	{ 0x0d, 0x0000, 0x000000, NULL },
463 	{ 0x0e, 0x0000, 0x000000, NULL },
464 	{ 0x0f, 0x0000, 0x000000, &vesa_modes[12] },
465 	{ 0x10, 0x6140, 0x000000, &vesa_modes[13] },
466 	{ 0x11, 0x614a, 0x000000, &vesa_modes[14] },
467 	{ 0x12, 0x614f, 0x000000, &vesa_modes[15] },
468 	{ 0x13, 0x6159, 0x000000, &vesa_modes[16] },
469 	{ 0x14, 0x0000, 0x000000, NULL },
470 	{ 0x15, 0x714f, 0x000000, &vesa_modes[17] },
471 	{ 0x16, 0x0000, 0x7f1c21, NULL },
472 	{ 0x17, 0x0000, 0x7f1c28, NULL },
473 	{ 0x18, 0x0000, 0x7f1c44, NULL },
474 	{ 0x19, 0x0000, 0x7f1c62, NULL },
475 	{ 0x1a, 0x0000, 0x000000, NULL },
476 	{ 0x1b, 0x0000, 0x8f1821, NULL },
477 	{ 0x1c, 0x8100, 0x8f1828, NULL },
478 	{ 0x1d, 0x810f, 0x8f1844, NULL },
479 	{ 0x1e, 0x8119, 0x8f1862, NULL },
480 	{ 0x1f, 0x0000, 0x000000, NULL },
481 	{ 0x20, 0x8140, 0x000000, &vesa_modes[18] },
482 	{ 0x21, 0x8159, 0x000000, &vesa_modes[19] },
483 	{ 0x22, 0x0000, 0x000000, NULL },
484 	{ 0x23, 0x8180, 0x000000, &vesa_modes[20] },
485 	{ 0x24, 0x818f, 0x000000, &vesa_modes[21] },
486 	{ 0x25, 0x8199, 0x000000, &vesa_modes[22] },
487 	{ 0x26, 0x0000, 0x000000, NULL },
488 	{ 0x27, 0x0000, 0x000000, NULL },
489 	{ 0x28, 0x0000, 0x000000, NULL },
490 	{ 0x29, 0x0000, 0x0c2021, NULL },
491 	{ 0x2a, 0x9040, 0x0c2028, NULL },
492 	{ 0x2b, 0x904f, 0x0c2044, NULL },
493 	{ 0x2c, 0x9059, 0x0c2062, NULL },
494 	{ 0x2d, 0x0000, 0x000000, NULL },
495 	{ 0x2e, 0x9500, 0xc11821, NULL },
496 	{ 0x2f, 0x9500, 0xc11828, NULL },
497 	{ 0x30, 0x950f, 0xc11844, NULL },
498 	{ 0x31, 0x9519, 0xc11868, NULL },
499 	{ 0x32, 0x0000, 0x000000, NULL },
500 	{ 0x33, 0xa940, 0x000000, &vesa_modes[23] },
501 	{ 0x34, 0xa945, 0x000000, &vesa_modes[24] },
502 	{ 0x35, 0xa94a, 0x000000, &vesa_modes[25] },
503 	{ 0x36, 0xa94f, 0x000000, &vesa_modes[26] },
504 	{ 0x37, 0xa959, 0x000000, &vesa_modes[27] },
505 	{ 0x38, 0x0000, 0x000000, NULL },
506 	{ 0x39, 0x0000, 0x0c2821, NULL },
507 	{ 0x3a, 0xb300, 0x0c2828, NULL },
508 	{ 0x3b, 0xb30f, 0x0c2844, NULL },
509 	{ 0x3c, 0xb319, 0x0c2868, NULL },
510 	{ 0x3d, 0x0000, 0x000000, NULL },
511 	{ 0x3e, 0xc140, 0x000000, &vesa_modes[28] },
512 	{ 0x3f, 0xc14f, 0x000000, &vesa_modes[29] },
513 	{ 0x40, 0x0000, 0x000000, NULL},
514 	{ 0x41, 0xc940, 0x000000, &vesa_modes[30] },
515 	{ 0x42, 0xc94f, 0x000000, &vesa_modes[31] },
516 	{ 0x43, 0x0000, 0x000000, NULL },
517 	{ 0x44, 0x0000, 0x572821, &vesa_modes[34] },
518 	{ 0x45, 0xd100, 0x572828, &vesa_modes[35] },
519 	{ 0x46, 0xd10f, 0x572844, &vesa_modes[36] },
520 	{ 0x47, 0xd119, 0x572862, &vesa_modes[37] },
521 	{ 0x48, 0x0000, 0x000000, NULL },
522 	{ 0x49, 0xd140, 0x000000, &vesa_modes[32] },
523 	{ 0x4a, 0xd14f, 0x000000, &vesa_modes[33] },
524 	{ 0x4b, 0x0000, 0x000000, NULL },
525 	{ 0x4c, 0x0000, 0x1f3821, &vesa_modes[38] },
526 	{ 0x4d, 0x0000, 0x1f3828, &vesa_modes[39] },
527 	{ 0x4e, 0x0000, 0x1f3844, &vesa_modes[40] },
528 	{ 0x4f, 0x0000, 0x1f3862, &vesa_modes[41] },
529 	{ 0x50, 0x0000, 0x000000, &vesa_modes[42] },
530 };
531 EXPORT_SYMBOL(dmt_modes);
532 #endif /* CONFIG_FB_MODE_HELPERS */
533 
534 /**
535  *	fb_try_mode - test a video mode
536  *	@var: frame buffer user defined part of display
537  *	@info: frame buffer info structure
538  *	@mode: frame buffer video mode structure
539  *	@bpp: color depth in bits per pixel
540  *
541  *	Tries a video mode to test it's validity for device @info.
542  *
543  *	Returns 1 on success.
544  *
545  */
546 
fb_try_mode(struct fb_var_screeninfo * var,struct fb_info * info,const struct fb_videomode * mode,unsigned int bpp)547 static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
548 		       const struct fb_videomode *mode, unsigned int bpp)
549 {
550 	int err = 0;
551 
552 	DPRINTK("Trying mode %s %dx%d-%d@%d\n",
553 		mode->name ? mode->name : "noname",
554 		mode->xres, mode->yres, bpp, mode->refresh);
555 	var->xres = mode->xres;
556 	var->yres = mode->yres;
557 	var->xres_virtual = mode->xres;
558 	var->yres_virtual = mode->yres;
559 	var->xoffset = 0;
560 	var->yoffset = 0;
561 	var->bits_per_pixel = bpp;
562 	var->activate |= FB_ACTIVATE_TEST;
563 	var->pixclock = mode->pixclock;
564 	var->left_margin = mode->left_margin;
565 	var->right_margin = mode->right_margin;
566 	var->upper_margin = mode->upper_margin;
567 	var->lower_margin = mode->lower_margin;
568 	var->hsync_len = mode->hsync_len;
569 	var->vsync_len = mode->vsync_len;
570 	var->sync = mode->sync;
571 	var->vmode = mode->vmode;
572 	if (info->fbops->fb_check_var)
573 		err = info->fbops->fb_check_var(var, info);
574 	var->activate &= ~FB_ACTIVATE_TEST;
575 	return err;
576 }
577 
578 /**
579  * fb_find_mode - finds a valid video mode
580  * @var: frame buffer user defined part of display
581  * @info: frame buffer info structure
582  * @mode_option: string video mode to find
583  * @db: video mode database
584  * @dbsize: size of @db
585  * @default_mode: default video mode to fall back to
586  * @default_bpp: default color depth in bits per pixel
587  *
588  * Finds a suitable video mode, starting with the specified mode
589  * in @mode_option with fallback to @default_mode.  If
590  * @default_mode fails, all modes in the video mode database will
591  * be tried.
592  *
593  * Valid mode specifiers for @mode_option::
594  *
595  *     <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][p][m]
596  *
597  * or ::
598  *
599  *     <name>[-<bpp>][@<refresh>]
600  *
601  * with <xres>, <yres>, <bpp> and <refresh> decimal numbers and
602  * <name> a string.
603  *
604  * If 'M' is present after yres (and before refresh/bpp if present),
605  * the function will compute the timings using VESA(tm) Coordinated
606  * Video Timings (CVT).  If 'R' is present after 'M', will compute with
607  * reduced blanking (for flatpanels).  If 'i' or 'p' are present, compute
608  * interlaced or progressive mode.  If 'm' is present, add margins equal
609  * to 1.8% of xres rounded down to 8 pixels, and 1.8% of yres. The char
610  * 'i', 'p' and 'm' must be after 'M' and 'R'. Example::
611  *
612  *     1024x768MR-8@60m - Reduced blank with margins at 60Hz.
613  *
614  * NOTE: The passed struct @var is _not_ cleared!  This allows you
615  * to supply values for e.g. the grayscale and accel_flags fields.
616  *
617  * Returns zero for failure, 1 if using specified @mode_option,
618  * 2 if using specified @mode_option with an ignored refresh rate,
619  * 3 if default mode is used, 4 if fall back to any valid mode.
620  */
621 
fb_find_mode(struct fb_var_screeninfo * var,struct fb_info * info,const char * mode_option,const struct fb_videomode * db,unsigned int dbsize,const struct fb_videomode * default_mode,unsigned int default_bpp)622 int fb_find_mode(struct fb_var_screeninfo *var,
623 		 struct fb_info *info, const char *mode_option,
624 		 const struct fb_videomode *db, unsigned int dbsize,
625 		 const struct fb_videomode *default_mode,
626 		 unsigned int default_bpp)
627 {
628 	char *mode_option_buf = NULL;
629 	int i;
630 
631 	/* Set up defaults */
632 	if (!db) {
633 		db = modedb;
634 		dbsize = ARRAY_SIZE(modedb);
635 	}
636 
637 	if (!default_mode)
638 		default_mode = &db[0];
639 
640 	if (!default_bpp)
641 		default_bpp = 8;
642 
643 	/* Did the user specify a video mode? */
644 	if (!mode_option) {
645 		fb_get_options(NULL, &mode_option_buf);
646 		mode_option = mode_option_buf;
647 	}
648 	if (mode_option) {
649 		const char *name = mode_option;
650 		unsigned int namelen = strlen(name);
651 		int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
652 		unsigned int xres = 0, yres = 0, bpp = default_bpp, refresh = 0;
653 		int yres_specified = 0, cvt = 0, rb = 0;
654 		int interlace_specified = 0, interlace = 0;
655 		int margins = 0;
656 		u32 best, diff, tdiff;
657 
658 		for (i = namelen-1; i >= 0; i--) {
659 			switch (name[i]) {
660 			case '@':
661 				namelen = i;
662 				if (!refresh_specified && !bpp_specified &&
663 				    !yres_specified) {
664 					refresh = simple_strtol(&name[i+1], NULL,
665 								10);
666 					refresh_specified = 1;
667 					if (cvt || rb)
668 						cvt = 0;
669 				} else
670 					goto done;
671 				break;
672 			case '-':
673 				namelen = i;
674 				if (!bpp_specified && !yres_specified) {
675 					bpp = simple_strtol(&name[i+1], NULL,
676 							    10);
677 					bpp_specified = 1;
678 					if (cvt || rb)
679 						cvt = 0;
680 				} else
681 					goto done;
682 				break;
683 			case 'x':
684 				if (!yres_specified) {
685 					yres = simple_strtol(&name[i+1], NULL,
686 							     10);
687 					yres_specified = 1;
688 				} else
689 					goto done;
690 				break;
691 			case '0' ... '9':
692 				break;
693 			case 'M':
694 				if (!yres_specified)
695 					cvt = 1;
696 				break;
697 			case 'R':
698 				if (!cvt)
699 					rb = 1;
700 				break;
701 			case 'm':
702 				if (!cvt)
703 					margins = 1;
704 				break;
705 			case 'p':
706 				if (!cvt) {
707 					interlace = 0;
708 					interlace_specified = 1;
709 				}
710 				break;
711 			case 'i':
712 				if (!cvt) {
713 					interlace = 1;
714 					interlace_specified = 1;
715 				}
716 				break;
717 			default:
718 				goto done;
719 			}
720 		}
721 		if (i < 0 && yres_specified) {
722 			xres = simple_strtol(name, NULL, 10);
723 			res_specified = 1;
724 		}
725 done:
726 		kfree(mode_option_buf);
727 		if (cvt) {
728 			struct fb_videomode cvt_mode;
729 			int ret;
730 
731 			DPRINTK("CVT mode %dx%d@%dHz%s%s%s\n", xres, yres,
732 				(refresh) ? refresh : 60,
733 				(rb) ? " reduced blanking" : "",
734 				(margins) ? " with margins" : "",
735 				(interlace) ? " interlaced" : "");
736 
737 			memset(&cvt_mode, 0, sizeof(cvt_mode));
738 			cvt_mode.xres = xres;
739 			cvt_mode.yres = yres;
740 			cvt_mode.refresh = (refresh) ? refresh : 60;
741 
742 			if (interlace)
743 				cvt_mode.vmode |= FB_VMODE_INTERLACED;
744 			else
745 				cvt_mode.vmode &= ~FB_VMODE_INTERLACED;
746 
747 			ret = fb_find_mode_cvt(&cvt_mode, margins, rb);
748 
749 			if (!ret && !fb_try_mode(var, info, &cvt_mode, bpp)) {
750 				DPRINTK("modedb CVT: CVT mode ok\n");
751 				return 1;
752 			}
753 
754 			DPRINTK("CVT mode invalid, getting mode from database\n");
755 		}
756 
757 		DPRINTK("Trying specified video mode%s %ix%i\n",
758 			refresh_specified ? "" : " (ignoring refresh rate)",
759 			xres, yres);
760 
761 		if (!refresh_specified) {
762 			/*
763 			 * If the caller has provided a custom mode database and
764 			 * a valid monspecs structure, we look for the mode with
765 			 * the highest refresh rate.  Otherwise we play it safe
766 			 * it and try to find a mode with a refresh rate closest
767 			 * to the standard 60 Hz.
768 			 */
769 			if (db != modedb &&
770 			    info->monspecs.vfmin && info->monspecs.vfmax &&
771 			    info->monspecs.hfmin && info->monspecs.hfmax &&
772 			    info->monspecs.dclkmax) {
773 				refresh = 1000;
774 			} else {
775 				refresh = 60;
776 			}
777 		}
778 
779 		diff = -1;
780 		best = -1;
781 		for (i = 0; i < dbsize; i++) {
782 			if ((name_matches(db[i], name, namelen) ||
783 			     (res_specified && res_matches(db[i], xres, yres))) &&
784 			    !fb_try_mode(var, info, &db[i], bpp)) {
785 				const int db_interlace = (db[i].vmode &
786 					FB_VMODE_INTERLACED ? 1 : 0);
787 				int score = abs(db[i].refresh - refresh);
788 
789 				if (interlace_specified)
790 					score += abs(db_interlace - interlace);
791 
792 				if (!interlace_specified ||
793 				    db_interlace == interlace)
794 					if (refresh_specified &&
795 					    db[i].refresh == refresh)
796 						return 1;
797 
798 				if (score < diff) {
799 					diff = score;
800 					best = i;
801 				}
802 			}
803 		}
804 		if (best != -1) {
805 			fb_try_mode(var, info, &db[best], bpp);
806 			return (refresh_specified) ? 2 : 1;
807 		}
808 
809 		diff = 2 * (xres + yres);
810 		best = -1;
811 		DPRINTK("Trying best-fit modes\n");
812 		for (i = 0; i < dbsize; i++) {
813 			DPRINTK("Trying %ix%i\n", db[i].xres, db[i].yres);
814 			if (!fb_try_mode(var, info, &db[i], bpp)) {
815 				tdiff = abs(db[i].xres - xres) +
816 					abs(db[i].yres - yres);
817 
818 				/*
819 				 * Penalize modes with resolutions smaller
820 				 * than requested.
821 				 */
822 				if (xres > db[i].xres || yres > db[i].yres)
823 					tdiff += xres + yres;
824 
825 				if (diff > tdiff) {
826 					diff = tdiff;
827 					best = i;
828 				}
829 			}
830 		}
831 		if (best != -1) {
832 			fb_try_mode(var, info, &db[best], bpp);
833 			return 5;
834 		}
835 	}
836 
837 	DPRINTK("Trying default video mode\n");
838 	if (!fb_try_mode(var, info, default_mode, default_bpp))
839 		return 3;
840 
841 	DPRINTK("Trying all modes\n");
842 	for (i = 0; i < dbsize; i++)
843 		if (!fb_try_mode(var, info, &db[i], default_bpp))
844 			return 4;
845 
846 	DPRINTK("No valid mode found\n");
847 	return 0;
848 }
849 
850 /**
851  * fb_var_to_videomode - convert fb_var_screeninfo to fb_videomode
852  * @mode: pointer to struct fb_videomode
853  * @var: pointer to struct fb_var_screeninfo
854  */
fb_var_to_videomode(struct fb_videomode * mode,const struct fb_var_screeninfo * var)855 void fb_var_to_videomode(struct fb_videomode *mode,
856 			 const struct fb_var_screeninfo *var)
857 {
858 	u32 pixclock, hfreq, htotal, vtotal;
859 
860 	mode->name = NULL;
861 	mode->xres = var->xres;
862 	mode->yres = var->yres;
863 	mode->pixclock = var->pixclock;
864 	mode->hsync_len = var->hsync_len;
865 	mode->vsync_len = var->vsync_len;
866 	mode->left_margin = var->left_margin;
867 	mode->right_margin = var->right_margin;
868 	mode->upper_margin = var->upper_margin;
869 	mode->lower_margin = var->lower_margin;
870 	mode->sync = var->sync;
871 	mode->vmode = var->vmode & FB_VMODE_MASK;
872 	mode->flag = FB_MODE_IS_FROM_VAR;
873 	mode->refresh = 0;
874 
875 	if (!var->pixclock)
876 		return;
877 
878 	pixclock = PICOS2KHZ(var->pixclock) * 1000;
879 
880 	htotal = var->xres + var->right_margin + var->hsync_len +
881 		var->left_margin;
882 	vtotal = var->yres + var->lower_margin + var->vsync_len +
883 		var->upper_margin;
884 
885 	if (var->vmode & FB_VMODE_INTERLACED)
886 		vtotal /= 2;
887 	if (var->vmode & FB_VMODE_DOUBLE)
888 		vtotal *= 2;
889 
890 	if (!htotal || !vtotal)
891 		return;
892 
893 	hfreq = pixclock/htotal;
894 	mode->refresh = hfreq/vtotal;
895 }
896 
897 /**
898  * fb_videomode_to_var - convert fb_videomode to fb_var_screeninfo
899  * @var: pointer to struct fb_var_screeninfo
900  * @mode: pointer to struct fb_videomode
901  */
fb_videomode_to_var(struct fb_var_screeninfo * var,const struct fb_videomode * mode)902 void fb_videomode_to_var(struct fb_var_screeninfo *var,
903 			 const struct fb_videomode *mode)
904 {
905 	var->xres = mode->xres;
906 	var->yres = mode->yres;
907 	var->xres_virtual = mode->xres;
908 	var->yres_virtual = mode->yres;
909 	var->xoffset = 0;
910 	var->yoffset = 0;
911 	var->pixclock = mode->pixclock;
912 	var->left_margin = mode->left_margin;
913 	var->right_margin = mode->right_margin;
914 	var->upper_margin = mode->upper_margin;
915 	var->lower_margin = mode->lower_margin;
916 	var->hsync_len = mode->hsync_len;
917 	var->vsync_len = mode->vsync_len;
918 	var->sync = mode->sync;
919 	var->vmode = mode->vmode & FB_VMODE_MASK;
920 }
921 
922 /**
923  * fb_mode_is_equal - compare 2 videomodes
924  * @mode1: first videomode
925  * @mode2: second videomode
926  *
927  * RETURNS:
928  * 1 if equal, 0 if not
929  */
fb_mode_is_equal(const struct fb_videomode * mode1,const struct fb_videomode * mode2)930 int fb_mode_is_equal(const struct fb_videomode *mode1,
931 		     const struct fb_videomode *mode2)
932 {
933 	return (mode1->xres         == mode2->xres &&
934 		mode1->yres         == mode2->yres &&
935 		mode1->pixclock     == mode2->pixclock &&
936 		mode1->hsync_len    == mode2->hsync_len &&
937 		mode1->vsync_len    == mode2->vsync_len &&
938 		mode1->left_margin  == mode2->left_margin &&
939 		mode1->right_margin == mode2->right_margin &&
940 		mode1->upper_margin == mode2->upper_margin &&
941 		mode1->lower_margin == mode2->lower_margin &&
942 		mode1->sync         == mode2->sync &&
943 		mode1->vmode        == mode2->vmode);
944 }
945 
946 /**
947  * fb_find_best_mode - find best matching videomode
948  * @var: pointer to struct fb_var_screeninfo
949  * @head: pointer to struct list_head of modelist
950  *
951  * RETURNS:
952  * struct fb_videomode, NULL if none found
953  *
954  * IMPORTANT:
955  * This function assumes that all modelist entries in
956  * info->modelist are valid.
957  *
958  * NOTES:
959  * Finds best matching videomode which has an equal or greater dimension than
960  * var->xres and var->yres.  If more than 1 videomode is found, will return
961  * the videomode with the highest refresh rate
962  */
fb_find_best_mode(const struct fb_var_screeninfo * var,struct list_head * head)963 const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
964 					     struct list_head *head)
965 {
966 	struct fb_modelist *modelist;
967 	struct fb_videomode *mode, *best = NULL;
968 	u32 diff = -1;
969 
970 	list_for_each_entry(modelist, head, list) {
971 		u32 d;
972 		mode = &modelist->mode;
973 
974 		if (mode->xres >= var->xres && mode->yres >= var->yres) {
975 			d = (mode->xres - var->xres) +
976 				(mode->yres - var->yres);
977 			if (diff > d) {
978 				diff = d;
979 				best = mode;
980 			} else if (diff == d && best &&
981 				   mode->refresh > best->refresh)
982 				best = mode;
983 		}
984 	}
985 	return best;
986 }
987 
988 /**
989  * fb_find_nearest_mode - find closest videomode
990  *
991  * @mode: pointer to struct fb_videomode
992  * @head: pointer to modelist
993  *
994  * Finds best matching videomode, smaller or greater in dimension.
995  * If more than 1 videomode is found, will return the videomode with
996  * the closest refresh rate.
997  */
fb_find_nearest_mode(const struct fb_videomode * mode,struct list_head * head)998 const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
999 					        struct list_head *head)
1000 {
1001 	struct fb_modelist *modelist;
1002 	struct fb_videomode *cmode, *best = NULL;
1003 	u32 diff = -1, diff_refresh = -1;
1004 
1005 	list_for_each_entry(modelist, head, list) {
1006 		u32 d;
1007 		cmode = &modelist->mode;
1008 
1009 		d = abs(cmode->xres - mode->xres) +
1010 			abs(cmode->yres - mode->yres);
1011 		if (diff > d) {
1012 			diff = d;
1013 			diff_refresh = abs(cmode->refresh - mode->refresh);
1014 			best = cmode;
1015 		} else if (diff == d) {
1016 			d = abs(cmode->refresh - mode->refresh);
1017 			if (diff_refresh > d) {
1018 				diff_refresh = d;
1019 				best = cmode;
1020 			}
1021 		}
1022 	}
1023 
1024 	return best;
1025 }
1026 
1027 /**
1028  * fb_match_mode - find a videomode which exactly matches the timings in var
1029  * @var: pointer to struct fb_var_screeninfo
1030  * @head: pointer to struct list_head of modelist
1031  *
1032  * RETURNS:
1033  * struct fb_videomode, NULL if none found
1034  */
fb_match_mode(const struct fb_var_screeninfo * var,struct list_head * head)1035 const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
1036 					 struct list_head *head)
1037 {
1038 	struct fb_modelist *modelist;
1039 	struct fb_videomode *m, mode;
1040 
1041 	fb_var_to_videomode(&mode, var);
1042 	list_for_each_entry(modelist, head, list) {
1043 		m = &modelist->mode;
1044 		if (fb_mode_is_equal(m, &mode))
1045 			return m;
1046 	}
1047 	return NULL;
1048 }
1049 
1050 /**
1051  * fb_add_videomode - adds videomode entry to modelist
1052  * @mode: videomode to add
1053  * @head: struct list_head of modelist
1054  *
1055  * NOTES:
1056  * Will only add unmatched mode entries
1057  */
fb_add_videomode(const struct fb_videomode * mode,struct list_head * head)1058 int fb_add_videomode(const struct fb_videomode *mode, struct list_head *head)
1059 {
1060 	struct fb_modelist *modelist;
1061 	struct fb_videomode *m;
1062 	int found = 0;
1063 
1064 	list_for_each_entry(modelist, head, list) {
1065 		m = &modelist->mode;
1066 		if (fb_mode_is_equal(m, mode)) {
1067 			found = 1;
1068 			break;
1069 		}
1070 	}
1071 	if (!found) {
1072 		modelist = kmalloc(sizeof(struct fb_modelist),
1073 						  GFP_KERNEL);
1074 
1075 		if (!modelist)
1076 			return -ENOMEM;
1077 		modelist->mode = *mode;
1078 		list_add(&modelist->list, head);
1079 	}
1080 	return 0;
1081 }
1082 
1083 /**
1084  * fb_delete_videomode - removed videomode entry from modelist
1085  * @mode: videomode to remove
1086  * @head: struct list_head of modelist
1087  *
1088  * NOTES:
1089  * Will remove all matching mode entries
1090  */
fb_delete_videomode(const struct fb_videomode * mode,struct list_head * head)1091 void fb_delete_videomode(const struct fb_videomode *mode,
1092 			 struct list_head *head)
1093 {
1094 	struct list_head *pos, *n;
1095 	struct fb_modelist *modelist;
1096 	struct fb_videomode *m;
1097 
1098 	list_for_each_safe(pos, n, head) {
1099 		modelist = list_entry(pos, struct fb_modelist, list);
1100 		m = &modelist->mode;
1101 		if (fb_mode_is_equal(m, mode)) {
1102 			list_del(pos);
1103 			kfree(pos);
1104 		}
1105 	}
1106 }
1107 
1108 /**
1109  * fb_destroy_modelist - destroy modelist
1110  * @head: struct list_head of modelist
1111  */
fb_destroy_modelist(struct list_head * head)1112 void fb_destroy_modelist(struct list_head *head)
1113 {
1114 	struct list_head *pos, *n;
1115 
1116 	list_for_each_safe(pos, n, head) {
1117 		list_del(pos);
1118 		kfree(pos);
1119 	}
1120 }
1121 EXPORT_SYMBOL_GPL(fb_destroy_modelist);
1122 
1123 /**
1124  * fb_videomode_to_modelist - convert mode array to mode list
1125  * @modedb: array of struct fb_videomode
1126  * @num: number of entries in array
1127  * @head: struct list_head of modelist
1128  */
fb_videomode_to_modelist(const struct fb_videomode * modedb,int num,struct list_head * head)1129 void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
1130 			      struct list_head *head)
1131 {
1132 	int i;
1133 
1134 	INIT_LIST_HEAD(head);
1135 
1136 	for (i = 0; i < num; i++) {
1137 		if (fb_add_videomode(&modedb[i], head))
1138 			return;
1139 	}
1140 }
1141 
fb_find_best_display(const struct fb_monspecs * specs,struct list_head * head)1142 const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
1143 					        struct list_head *head)
1144 {
1145 	struct fb_modelist *modelist;
1146 	const struct fb_videomode *m, *m1 = NULL, *md = NULL, *best = NULL;
1147 	int first = 0;
1148 
1149 	if (!head->prev || !head->next || list_empty(head))
1150 		goto finished;
1151 
1152 	/* get the first detailed mode and the very first mode */
1153 	list_for_each_entry(modelist, head, list) {
1154 		m = &modelist->mode;
1155 
1156 		if (!first) {
1157 			m1 = m;
1158 			first = 1;
1159 		}
1160 
1161 		if (m->flag & FB_MODE_IS_FIRST) {
1162  			md = m;
1163 			break;
1164 		}
1165 	}
1166 
1167 	/* first detailed timing is preferred */
1168 	if (specs->misc & FB_MISC_1ST_DETAIL) {
1169 		best = md;
1170 		goto finished;
1171 	}
1172 
1173 	/* find best mode based on display width and height */
1174 	if (specs->max_x && specs->max_y) {
1175 		struct fb_var_screeninfo var;
1176 
1177 		memset(&var, 0, sizeof(struct fb_var_screeninfo));
1178 		var.xres = (specs->max_x * 7200)/254;
1179 		var.yres = (specs->max_y * 7200)/254;
1180 		m = fb_find_best_mode(&var, head);
1181 		if (m) {
1182 			best = m;
1183 			goto finished;
1184 		}
1185 	}
1186 
1187 	/* use first detailed mode */
1188 	if (md) {
1189 		best = md;
1190 		goto finished;
1191 	}
1192 
1193 	/* last resort, use the very first mode */
1194 	best = m1;
1195 finished:
1196 	return best;
1197 }
1198 EXPORT_SYMBOL(fb_find_best_display);
1199 
1200 EXPORT_SYMBOL(fb_videomode_to_var);
1201 EXPORT_SYMBOL(fb_var_to_videomode);
1202 EXPORT_SYMBOL(fb_mode_is_equal);
1203 EXPORT_SYMBOL(fb_add_videomode);
1204 EXPORT_SYMBOL(fb_match_mode);
1205 EXPORT_SYMBOL(fb_find_best_mode);
1206 EXPORT_SYMBOL(fb_find_nearest_mode);
1207 EXPORT_SYMBOL(fb_videomode_to_modelist);
1208 EXPORT_SYMBOL(fb_find_mode);
1209 EXPORT_SYMBOL(fb_find_mode_cvt);
1210