]>
Commit | Line | Data |
---|---|---|
b18787ed HV |
1 | /* |
2 | * v4l2-dv-timings - dv-timings helper functions | |
3 | * | |
4 | * Copyright 2013 Cisco Systems, Inc. and/or its affiliates. All rights reserved. | |
5 | * | |
6 | * This program is free software; you may redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; version 2 of the License. | |
9 | * | |
10 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
11 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
12 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
13 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
14 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
15 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
16 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
17 | * SOFTWARE. | |
18 | * | |
19 | */ | |
20 | ||
21 | #include <linux/module.h> | |
22 | #include <linux/types.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/errno.h> | |
65243076 | 25 | #include <linux/rational.h> |
b18787ed HV |
26 | #include <linux/videodev2.h> |
27 | #include <linux/v4l2-dv-timings.h> | |
b18787ed | 28 | #include <media/v4l2-dv-timings.h> |
c9bc9f50 | 29 | #include <linux/math64.h> |
b18787ed | 30 | |
c4885ada HV |
31 | MODULE_AUTHOR("Hans Verkuil"); |
32 | MODULE_DESCRIPTION("V4L2 DV Timings Helper Functions"); | |
33 | MODULE_LICENSE("GPL"); | |
34 | ||
d1c65ad6 | 35 | const struct v4l2_dv_timings v4l2_dv_timings_presets[] = { |
b18787ed HV |
36 | V4L2_DV_BT_CEA_640X480P59_94, |
37 | V4L2_DV_BT_CEA_720X480I59_94, | |
38 | V4L2_DV_BT_CEA_720X480P59_94, | |
39 | V4L2_DV_BT_CEA_720X576I50, | |
40 | V4L2_DV_BT_CEA_720X576P50, | |
41 | V4L2_DV_BT_CEA_1280X720P24, | |
42 | V4L2_DV_BT_CEA_1280X720P25, | |
43 | V4L2_DV_BT_CEA_1280X720P30, | |
44 | V4L2_DV_BT_CEA_1280X720P50, | |
45 | V4L2_DV_BT_CEA_1280X720P60, | |
46 | V4L2_DV_BT_CEA_1920X1080P24, | |
47 | V4L2_DV_BT_CEA_1920X1080P25, | |
48 | V4L2_DV_BT_CEA_1920X1080P30, | |
49 | V4L2_DV_BT_CEA_1920X1080I50, | |
50 | V4L2_DV_BT_CEA_1920X1080P50, | |
51 | V4L2_DV_BT_CEA_1920X1080I60, | |
52 | V4L2_DV_BT_CEA_1920X1080P60, | |
53 | V4L2_DV_BT_DMT_640X350P85, | |
54 | V4L2_DV_BT_DMT_640X400P85, | |
55 | V4L2_DV_BT_DMT_720X400P85, | |
56 | V4L2_DV_BT_DMT_640X480P72, | |
57 | V4L2_DV_BT_DMT_640X480P75, | |
58 | V4L2_DV_BT_DMT_640X480P85, | |
59 | V4L2_DV_BT_DMT_800X600P56, | |
60 | V4L2_DV_BT_DMT_800X600P60, | |
61 | V4L2_DV_BT_DMT_800X600P72, | |
62 | V4L2_DV_BT_DMT_800X600P75, | |
63 | V4L2_DV_BT_DMT_800X600P85, | |
64 | V4L2_DV_BT_DMT_800X600P120_RB, | |
65 | V4L2_DV_BT_DMT_848X480P60, | |
66 | V4L2_DV_BT_DMT_1024X768I43, | |
67 | V4L2_DV_BT_DMT_1024X768P60, | |
68 | V4L2_DV_BT_DMT_1024X768P70, | |
69 | V4L2_DV_BT_DMT_1024X768P75, | |
70 | V4L2_DV_BT_DMT_1024X768P85, | |
71 | V4L2_DV_BT_DMT_1024X768P120_RB, | |
72 | V4L2_DV_BT_DMT_1152X864P75, | |
73 | V4L2_DV_BT_DMT_1280X768P60_RB, | |
74 | V4L2_DV_BT_DMT_1280X768P60, | |
75 | V4L2_DV_BT_DMT_1280X768P75, | |
76 | V4L2_DV_BT_DMT_1280X768P85, | |
77 | V4L2_DV_BT_DMT_1280X768P120_RB, | |
78 | V4L2_DV_BT_DMT_1280X800P60_RB, | |
79 | V4L2_DV_BT_DMT_1280X800P60, | |
80 | V4L2_DV_BT_DMT_1280X800P75, | |
81 | V4L2_DV_BT_DMT_1280X800P85, | |
82 | V4L2_DV_BT_DMT_1280X800P120_RB, | |
83 | V4L2_DV_BT_DMT_1280X960P60, | |
84 | V4L2_DV_BT_DMT_1280X960P85, | |
85 | V4L2_DV_BT_DMT_1280X960P120_RB, | |
86 | V4L2_DV_BT_DMT_1280X1024P60, | |
87 | V4L2_DV_BT_DMT_1280X1024P75, | |
88 | V4L2_DV_BT_DMT_1280X1024P85, | |
89 | V4L2_DV_BT_DMT_1280X1024P120_RB, | |
90 | V4L2_DV_BT_DMT_1360X768P60, | |
91 | V4L2_DV_BT_DMT_1360X768P120_RB, | |
92 | V4L2_DV_BT_DMT_1366X768P60, | |
93 | V4L2_DV_BT_DMT_1366X768P60_RB, | |
94 | V4L2_DV_BT_DMT_1400X1050P60_RB, | |
95 | V4L2_DV_BT_DMT_1400X1050P60, | |
96 | V4L2_DV_BT_DMT_1400X1050P75, | |
97 | V4L2_DV_BT_DMT_1400X1050P85, | |
98 | V4L2_DV_BT_DMT_1400X1050P120_RB, | |
99 | V4L2_DV_BT_DMT_1440X900P60_RB, | |
100 | V4L2_DV_BT_DMT_1440X900P60, | |
101 | V4L2_DV_BT_DMT_1440X900P75, | |
102 | V4L2_DV_BT_DMT_1440X900P85, | |
103 | V4L2_DV_BT_DMT_1440X900P120_RB, | |
104 | V4L2_DV_BT_DMT_1600X900P60_RB, | |
105 | V4L2_DV_BT_DMT_1600X1200P60, | |
106 | V4L2_DV_BT_DMT_1600X1200P65, | |
107 | V4L2_DV_BT_DMT_1600X1200P70, | |
108 | V4L2_DV_BT_DMT_1600X1200P75, | |
109 | V4L2_DV_BT_DMT_1600X1200P85, | |
110 | V4L2_DV_BT_DMT_1600X1200P120_RB, | |
111 | V4L2_DV_BT_DMT_1680X1050P60_RB, | |
112 | V4L2_DV_BT_DMT_1680X1050P60, | |
113 | V4L2_DV_BT_DMT_1680X1050P75, | |
114 | V4L2_DV_BT_DMT_1680X1050P85, | |
115 | V4L2_DV_BT_DMT_1680X1050P120_RB, | |
116 | V4L2_DV_BT_DMT_1792X1344P60, | |
117 | V4L2_DV_BT_DMT_1792X1344P75, | |
118 | V4L2_DV_BT_DMT_1792X1344P120_RB, | |
119 | V4L2_DV_BT_DMT_1856X1392P60, | |
120 | V4L2_DV_BT_DMT_1856X1392P75, | |
121 | V4L2_DV_BT_DMT_1856X1392P120_RB, | |
122 | V4L2_DV_BT_DMT_1920X1200P60_RB, | |
123 | V4L2_DV_BT_DMT_1920X1200P60, | |
124 | V4L2_DV_BT_DMT_1920X1200P75, | |
125 | V4L2_DV_BT_DMT_1920X1200P85, | |
126 | V4L2_DV_BT_DMT_1920X1200P120_RB, | |
127 | V4L2_DV_BT_DMT_1920X1440P60, | |
128 | V4L2_DV_BT_DMT_1920X1440P75, | |
129 | V4L2_DV_BT_DMT_1920X1440P120_RB, | |
130 | V4L2_DV_BT_DMT_2048X1152P60_RB, | |
131 | V4L2_DV_BT_DMT_2560X1600P60_RB, | |
132 | V4L2_DV_BT_DMT_2560X1600P60, | |
133 | V4L2_DV_BT_DMT_2560X1600P75, | |
134 | V4L2_DV_BT_DMT_2560X1600P85, | |
135 | V4L2_DV_BT_DMT_2560X1600P120_RB, | |
bc96f30c HV |
136 | V4L2_DV_BT_CEA_3840X2160P24, |
137 | V4L2_DV_BT_CEA_3840X2160P25, | |
138 | V4L2_DV_BT_CEA_3840X2160P30, | |
139 | V4L2_DV_BT_CEA_3840X2160P50, | |
140 | V4L2_DV_BT_CEA_3840X2160P60, | |
141 | V4L2_DV_BT_CEA_4096X2160P24, | |
142 | V4L2_DV_BT_CEA_4096X2160P25, | |
143 | V4L2_DV_BT_CEA_4096X2160P30, | |
144 | V4L2_DV_BT_CEA_4096X2160P50, | |
145 | V4L2_DV_BT_DMT_4096X2160P59_94_RB, | |
146 | V4L2_DV_BT_CEA_4096X2160P60, | |
d1c65ad6 | 147 | { } |
b18787ed | 148 | }; |
d1c65ad6 | 149 | EXPORT_SYMBOL_GPL(v4l2_dv_timings_presets); |
b18787ed | 150 | |
70b65494 | 151 | bool v4l2_valid_dv_timings(const struct v4l2_dv_timings *t, |
b8f0fff4 HV |
152 | const struct v4l2_dv_timings_cap *dvcap, |
153 | v4l2_check_dv_timings_fnc fnc, | |
154 | void *fnc_handle) | |
b18787ed HV |
155 | { |
156 | const struct v4l2_bt_timings *bt = &t->bt; | |
157 | const struct v4l2_bt_timings_cap *cap = &dvcap->bt; | |
158 | u32 caps = cap->capabilities; | |
159 | ||
160 | if (t->type != V4L2_DV_BT_656_1120) | |
161 | return false; | |
162 | if (t->type != dvcap->type || | |
163 | bt->height < cap->min_height || | |
164 | bt->height > cap->max_height || | |
165 | bt->width < cap->min_width || | |
166 | bt->width > cap->max_width || | |
167 | bt->pixelclock < cap->min_pixelclock || | |
168 | bt->pixelclock > cap->max_pixelclock || | |
8e20b803 HV |
169 | (!(caps & V4L2_DV_BT_CAP_CUSTOM) && |
170 | cap->standards && bt->standards && | |
c166845c | 171 | !(bt->standards & cap->standards)) || |
b18787ed HV |
172 | (bt->interlaced && !(caps & V4L2_DV_BT_CAP_INTERLACED)) || |
173 | (!bt->interlaced && !(caps & V4L2_DV_BT_CAP_PROGRESSIVE))) | |
174 | return false; | |
b8f0fff4 | 175 | return fnc == NULL || fnc(t, fnc_handle); |
b18787ed | 176 | } |
70b65494 | 177 | EXPORT_SYMBOL_GPL(v4l2_valid_dv_timings); |
b18787ed HV |
178 | |
179 | int v4l2_enum_dv_timings_cap(struct v4l2_enum_dv_timings *t, | |
b8f0fff4 HV |
180 | const struct v4l2_dv_timings_cap *cap, |
181 | v4l2_check_dv_timings_fnc fnc, | |
182 | void *fnc_handle) | |
b18787ed HV |
183 | { |
184 | u32 i, idx; | |
185 | ||
186 | memset(t->reserved, 0, sizeof(t->reserved)); | |
d1c65ad6 | 187 | for (i = idx = 0; v4l2_dv_timings_presets[i].bt.width; i++) { |
b8f0fff4 HV |
188 | if (v4l2_valid_dv_timings(v4l2_dv_timings_presets + i, cap, |
189 | fnc, fnc_handle) && | |
b18787ed | 190 | idx++ == t->index) { |
d1c65ad6 | 191 | t->timings = v4l2_dv_timings_presets[i]; |
b18787ed HV |
192 | return 0; |
193 | } | |
194 | } | |
195 | return -EINVAL; | |
196 | } | |
197 | EXPORT_SYMBOL_GPL(v4l2_enum_dv_timings_cap); | |
198 | ||
199 | bool v4l2_find_dv_timings_cap(struct v4l2_dv_timings *t, | |
200 | const struct v4l2_dv_timings_cap *cap, | |
b8f0fff4 HV |
201 | unsigned pclock_delta, |
202 | v4l2_check_dv_timings_fnc fnc, | |
203 | void *fnc_handle) | |
b18787ed HV |
204 | { |
205 | int i; | |
206 | ||
b8f0fff4 | 207 | if (!v4l2_valid_dv_timings(t, cap, fnc, fnc_handle)) |
b18787ed HV |
208 | return false; |
209 | ||
d1c65ad6 | 210 | for (i = 0; i < v4l2_dv_timings_presets[i].bt.width; i++) { |
b8f0fff4 HV |
211 | if (v4l2_valid_dv_timings(v4l2_dv_timings_presets + i, cap, |
212 | fnc, fnc_handle) && | |
213 | v4l2_match_dv_timings(t, v4l2_dv_timings_presets + i, | |
85f9e06c | 214 | pclock_delta, false)) { |
8d7322f4 PL |
215 | u32 flags = t->bt.flags & V4L2_DV_FL_REDUCED_FPS; |
216 | ||
d1c65ad6 | 217 | *t = v4l2_dv_timings_presets[i]; |
8d7322f4 PL |
218 | if (can_reduce_fps(&t->bt)) |
219 | t->bt.flags |= flags; | |
220 | ||
b18787ed HV |
221 | return true; |
222 | } | |
223 | } | |
224 | return false; | |
225 | } | |
226 | EXPORT_SYMBOL_GPL(v4l2_find_dv_timings_cap); | |
25764158 | 227 | |
65243076 HV |
228 | bool v4l2_find_dv_timings_cea861_vic(struct v4l2_dv_timings *t, u8 vic) |
229 | { | |
230 | unsigned int i; | |
231 | ||
232 | for (i = 0; i < v4l2_dv_timings_presets[i].bt.width; i++) { | |
233 | const struct v4l2_bt_timings *bt = | |
234 | &v4l2_dv_timings_presets[i].bt; | |
235 | ||
236 | if ((bt->flags & V4L2_DV_FL_HAS_CEA861_VIC) && | |
237 | bt->cea861_vic == vic) { | |
238 | *t = v4l2_dv_timings_presets[i]; | |
239 | return true; | |
240 | } | |
241 | } | |
242 | return false; | |
243 | } | |
244 | EXPORT_SYMBOL_GPL(v4l2_find_dv_timings_cea861_vic); | |
245 | ||
25764158 | 246 | /** |
ef1ed8f5 | 247 | * v4l2_match_dv_timings - check if two timings match |
d28b2cf9 MCC |
248 | * @t1: compare this v4l2_dv_timings struct... |
249 | * @t2: with this struct. | |
250 | * @pclock_delta: the allowed pixelclock deviation. | |
251 | * @match_reduced_fps: if true, then fail if V4L2_DV_FL_REDUCED_FPS does not | |
252 | * match. | |
25764158 HV |
253 | * |
254 | * Compare t1 with t2 with a given margin of error for the pixelclock. | |
255 | */ | |
ef1ed8f5 HV |
256 | bool v4l2_match_dv_timings(const struct v4l2_dv_timings *t1, |
257 | const struct v4l2_dv_timings *t2, | |
85f9e06c | 258 | unsigned pclock_delta, bool match_reduced_fps) |
25764158 HV |
259 | { |
260 | if (t1->type != t2->type || t1->type != V4L2_DV_BT_656_1120) | |
261 | return false; | |
262 | if (t1->bt.width == t2->bt.width && | |
263 | t1->bt.height == t2->bt.height && | |
264 | t1->bt.interlaced == t2->bt.interlaced && | |
265 | t1->bt.polarities == t2->bt.polarities && | |
266 | t1->bt.pixelclock >= t2->bt.pixelclock - pclock_delta && | |
267 | t1->bt.pixelclock <= t2->bt.pixelclock + pclock_delta && | |
268 | t1->bt.hfrontporch == t2->bt.hfrontporch && | |
74c9c0fe MR |
269 | t1->bt.hsync == t2->bt.hsync && |
270 | t1->bt.hbackporch == t2->bt.hbackporch && | |
25764158 HV |
271 | t1->bt.vfrontporch == t2->bt.vfrontporch && |
272 | t1->bt.vsync == t2->bt.vsync && | |
273 | t1->bt.vbackporch == t2->bt.vbackporch && | |
85f9e06c HV |
274 | (!match_reduced_fps || |
275 | (t1->bt.flags & V4L2_DV_FL_REDUCED_FPS) == | |
276 | (t2->bt.flags & V4L2_DV_FL_REDUCED_FPS)) && | |
25764158 HV |
277 | (!t1->bt.interlaced || |
278 | (t1->bt.il_vfrontporch == t2->bt.il_vfrontporch && | |
279 | t1->bt.il_vsync == t2->bt.il_vsync && | |
280 | t1->bt.il_vbackporch == t2->bt.il_vbackporch))) | |
281 | return true; | |
282 | return false; | |
283 | } | |
ef1ed8f5 | 284 | EXPORT_SYMBOL_GPL(v4l2_match_dv_timings); |
25764158 | 285 | |
0216dc2f HV |
286 | void v4l2_print_dv_timings(const char *dev_prefix, const char *prefix, |
287 | const struct v4l2_dv_timings *t, bool detailed) | |
288 | { | |
289 | const struct v4l2_bt_timings *bt = &t->bt; | |
290 | u32 htot, vtot; | |
227da85e | 291 | u32 fps; |
0216dc2f HV |
292 | |
293 | if (t->type != V4L2_DV_BT_656_1120) | |
294 | return; | |
295 | ||
296 | htot = V4L2_DV_BT_FRAME_WIDTH(bt); | |
297 | vtot = V4L2_DV_BT_FRAME_HEIGHT(bt); | |
8cf6874e HV |
298 | if (bt->interlaced) |
299 | vtot /= 2; | |
0216dc2f | 300 | |
227da85e PL |
301 | fps = (htot * vtot) > 0 ? div_u64((100 * (u64)bt->pixelclock), |
302 | (htot * vtot)) : 0; | |
303 | ||
0216dc2f HV |
304 | if (prefix == NULL) |
305 | prefix = ""; | |
306 | ||
227da85e | 307 | pr_info("%s: %s%ux%u%s%u.%u (%ux%u)\n", dev_prefix, prefix, |
0216dc2f | 308 | bt->width, bt->height, bt->interlaced ? "i" : "p", |
227da85e | 309 | fps / 100, fps % 100, htot, vtot); |
0216dc2f HV |
310 | |
311 | if (!detailed) | |
312 | return; | |
313 | ||
314 | pr_info("%s: horizontal: fp = %u, %ssync = %u, bp = %u\n", | |
315 | dev_prefix, bt->hfrontporch, | |
316 | (bt->polarities & V4L2_DV_HSYNC_POS_POL) ? "+" : "-", | |
317 | bt->hsync, bt->hbackporch); | |
318 | pr_info("%s: vertical: fp = %u, %ssync = %u, bp = %u\n", | |
319 | dev_prefix, bt->vfrontporch, | |
320 | (bt->polarities & V4L2_DV_VSYNC_POS_POL) ? "+" : "-", | |
321 | bt->vsync, bt->vbackporch); | |
8cf6874e HV |
322 | if (bt->interlaced) |
323 | pr_info("%s: vertical bottom field: fp = %u, %ssync = %u, bp = %u\n", | |
324 | dev_prefix, bt->il_vfrontporch, | |
325 | (bt->polarities & V4L2_DV_VSYNC_POS_POL) ? "+" : "-", | |
326 | bt->il_vsync, bt->il_vbackporch); | |
0216dc2f | 327 | pr_info("%s: pixelclock: %llu\n", dev_prefix, bt->pixelclock); |
65243076 HV |
328 | pr_info("%s: flags (0x%x):%s%s%s%s%s%s%s%s%s%s\n", |
329 | dev_prefix, bt->flags, | |
0216dc2f HV |
330 | (bt->flags & V4L2_DV_FL_REDUCED_BLANKING) ? |
331 | " REDUCED_BLANKING" : "", | |
1b3b3841 HV |
332 | ((bt->flags & V4L2_DV_FL_REDUCED_BLANKING) && |
333 | bt->vsync == 8) ? " (V2)" : "", | |
0216dc2f HV |
334 | (bt->flags & V4L2_DV_FL_CAN_REDUCE_FPS) ? |
335 | " CAN_REDUCE_FPS" : "", | |
336 | (bt->flags & V4L2_DV_FL_REDUCED_FPS) ? | |
337 | " REDUCED_FPS" : "", | |
338 | (bt->flags & V4L2_DV_FL_HALF_LINE) ? | |
74d802d8 HV |
339 | " HALF_LINE" : "", |
340 | (bt->flags & V4L2_DV_FL_IS_CE_VIDEO) ? | |
7389e6ef CAC |
341 | " CE_VIDEO" : "", |
342 | (bt->flags & V4L2_DV_FL_FIRST_FIELD_EXTRA_LINE) ? | |
65243076 HV |
343 | " FIRST_FIELD_EXTRA_LINE" : "", |
344 | (bt->flags & V4L2_DV_FL_HAS_PICTURE_ASPECT) ? | |
345 | " HAS_PICTURE_ASPECT" : "", | |
346 | (bt->flags & V4L2_DV_FL_HAS_CEA861_VIC) ? | |
347 | " HAS_CEA861_VIC" : "", | |
348 | (bt->flags & V4L2_DV_FL_HAS_HDMI_VIC) ? | |
349 | " HAS_HDMI_VIC" : ""); | |
7389e6ef | 350 | pr_info("%s: standards (0x%x):%s%s%s%s%s\n", dev_prefix, bt->standards, |
0216dc2f HV |
351 | (bt->standards & V4L2_DV_BT_STD_CEA861) ? " CEA" : "", |
352 | (bt->standards & V4L2_DV_BT_STD_DMT) ? " DMT" : "", | |
353 | (bt->standards & V4L2_DV_BT_STD_CVT) ? " CVT" : "", | |
7389e6ef CAC |
354 | (bt->standards & V4L2_DV_BT_STD_GTF) ? " GTF" : "", |
355 | (bt->standards & V4L2_DV_BT_STD_SDI) ? " SDI" : ""); | |
65243076 HV |
356 | if (bt->flags & V4L2_DV_FL_HAS_PICTURE_ASPECT) |
357 | pr_info("%s: picture aspect (hor:vert): %u:%u\n", dev_prefix, | |
358 | bt->picture_aspect.numerator, | |
359 | bt->picture_aspect.denominator); | |
360 | if (bt->flags & V4L2_DV_FL_HAS_CEA861_VIC) | |
361 | pr_info("%s: CEA-861 VIC: %u\n", dev_prefix, bt->cea861_vic); | |
362 | if (bt->flags & V4L2_DV_FL_HAS_HDMI_VIC) | |
363 | pr_info("%s: HDMI VIC: %u\n", dev_prefix, bt->hdmi_vic); | |
0216dc2f HV |
364 | } |
365 | EXPORT_SYMBOL_GPL(v4l2_print_dv_timings); | |
366 | ||
65243076 HV |
367 | struct v4l2_fract v4l2_dv_timings_aspect_ratio(const struct v4l2_dv_timings *t) |
368 | { | |
369 | struct v4l2_fract ratio = { 1, 1 }; | |
370 | unsigned long n, d; | |
371 | ||
372 | if (t->type != V4L2_DV_BT_656_1120) | |
373 | return ratio; | |
374 | if (!(t->bt.flags & V4L2_DV_FL_HAS_PICTURE_ASPECT)) | |
375 | return ratio; | |
376 | ||
377 | ratio.numerator = t->bt.width * t->bt.picture_aspect.denominator; | |
378 | ratio.denominator = t->bt.height * t->bt.picture_aspect.numerator; | |
379 | ||
380 | rational_best_approximation(ratio.numerator, ratio.denominator, | |
381 | ratio.numerator, ratio.denominator, &n, &d); | |
382 | ratio.numerator = n; | |
383 | ratio.denominator = d; | |
384 | return ratio; | |
385 | } | |
386 | EXPORT_SYMBOL_GPL(v4l2_dv_timings_aspect_ratio); | |
387 | ||
25764158 HV |
388 | /* |
389 | * CVT defines | |
390 | * Based on Coordinated Video Timings Standard | |
391 | * version 1.1 September 10, 2003 | |
392 | */ | |
393 | ||
394 | #define CVT_PXL_CLK_GRAN 250000 /* pixel clock granularity */ | |
5fea1bb7 | 395 | #define CVT_PXL_CLK_GRAN_RB_V2 1000 /* granularity for reduced blanking v2*/ |
25764158 HV |
396 | |
397 | /* Normal blanking */ | |
398 | #define CVT_MIN_V_BPORCH 7 /* lines */ | |
399 | #define CVT_MIN_V_PORCH_RND 3 /* lines */ | |
400 | #define CVT_MIN_VSYNC_BP 550 /* min time of vsync + back porch (us) */ | |
9c3f2052 | 401 | #define CVT_HSYNC_PERCENT 8 /* nominal hsync as percentage of line */ |
25764158 HV |
402 | |
403 | /* Normal blanking for CVT uses GTF to calculate horizontal blanking */ | |
404 | #define CVT_CELL_GRAN 8 /* character cell granularity */ | |
405 | #define CVT_M 600 /* blanking formula gradient */ | |
406 | #define CVT_C 40 /* blanking formula offset */ | |
407 | #define CVT_K 128 /* blanking formula scaling factor */ | |
408 | #define CVT_J 20 /* blanking formula scaling factor */ | |
409 | #define CVT_C_PRIME (((CVT_C - CVT_J) * CVT_K / 256) + CVT_J) | |
410 | #define CVT_M_PRIME (CVT_K * CVT_M / 256) | |
411 | ||
412 | /* Reduced Blanking */ | |
413 | #define CVT_RB_MIN_V_BPORCH 7 /* lines */ | |
414 | #define CVT_RB_V_FPORCH 3 /* lines */ | |
5fea1bb7 | 415 | #define CVT_RB_MIN_V_BLANK 460 /* us */ |
25764158 | 416 | #define CVT_RB_H_SYNC 32 /* pixels */ |
25764158 | 417 | #define CVT_RB_H_BLANK 160 /* pixels */ |
5fea1bb7 PL |
418 | /* Reduce blanking Version 2 */ |
419 | #define CVT_RB_V2_H_BLANK 80 /* pixels */ | |
420 | #define CVT_RB_MIN_V_FPORCH 3 /* lines */ | |
421 | #define CVT_RB_V2_MIN_V_FPORCH 1 /* lines */ | |
422 | #define CVT_RB_V_BPORCH 6 /* lines */ | |
25764158 HV |
423 | |
424 | /** v4l2_detect_cvt - detect if the given timings follow the CVT standard | |
425 | * @frame_height - the total height of the frame (including blanking) in lines. | |
426 | * @hfreq - the horizontal frequency in Hz. | |
427 | * @vsync - the height of the vertical sync in lines. | |
5fea1bb7 PL |
428 | * @active_width - active width of image (does not include blanking). This |
429 | * information is needed only in case of version 2 of reduced blanking. | |
430 | * In other cases, this parameter does not have any effect on timings. | |
25764158 HV |
431 | * @polarities - the horizontal and vertical polarities (same as struct |
432 | * v4l2_bt_timings polarities). | |
061ddda6 | 433 | * @interlaced - if this flag is true, it indicates interlaced format |
25764158 HV |
434 | * @fmt - the resulting timings. |
435 | * | |
436 | * This function will attempt to detect if the given values correspond to a | |
437 | * valid CVT format. If so, then it will return true, and fmt will be filled | |
438 | * in with the found CVT timings. | |
439 | */ | |
5fea1bb7 PL |
440 | bool v4l2_detect_cvt(unsigned frame_height, |
441 | unsigned hfreq, | |
442 | unsigned vsync, | |
443 | unsigned active_width, | |
444 | u32 polarities, | |
445 | bool interlaced, | |
446 | struct v4l2_dv_timings *fmt) | |
25764158 HV |
447 | { |
448 | int v_fp, v_bp, h_fp, h_bp, hsync; | |
449 | int frame_width, image_height, image_width; | |
450 | bool reduced_blanking; | |
5fea1bb7 | 451 | bool rb_v2 = false; |
25764158 HV |
452 | unsigned pix_clk; |
453 | ||
5fea1bb7 | 454 | if (vsync < 4 || vsync > 8) |
25764158 HV |
455 | return false; |
456 | ||
457 | if (polarities == V4L2_DV_VSYNC_POS_POL) | |
458 | reduced_blanking = false; | |
459 | else if (polarities == V4L2_DV_HSYNC_POS_POL) | |
460 | reduced_blanking = true; | |
461 | else | |
462 | return false; | |
463 | ||
5fea1bb7 PL |
464 | if (reduced_blanking && vsync == 8) |
465 | rb_v2 = true; | |
466 | ||
467 | if (rb_v2 && active_width == 0) | |
468 | return false; | |
469 | ||
470 | if (!rb_v2 && vsync > 7) | |
471 | return false; | |
472 | ||
947ed99e PL |
473 | if (hfreq == 0) |
474 | return false; | |
475 | ||
25764158 HV |
476 | /* Vertical */ |
477 | if (reduced_blanking) { | |
5fea1bb7 PL |
478 | if (rb_v2) { |
479 | v_bp = CVT_RB_V_BPORCH; | |
480 | v_fp = (CVT_RB_MIN_V_BLANK * hfreq) / 1000000 + 1; | |
481 | v_fp -= vsync + v_bp; | |
482 | ||
483 | if (v_fp < CVT_RB_V2_MIN_V_FPORCH) | |
484 | v_fp = CVT_RB_V2_MIN_V_FPORCH; | |
485 | } else { | |
486 | v_fp = CVT_RB_V_FPORCH; | |
487 | v_bp = (CVT_RB_MIN_V_BLANK * hfreq) / 1000000 + 1; | |
488 | v_bp -= vsync + v_fp; | |
489 | ||
490 | if (v_bp < CVT_RB_MIN_V_BPORCH) | |
491 | v_bp = CVT_RB_MIN_V_BPORCH; | |
492 | } | |
25764158 HV |
493 | } else { |
494 | v_fp = CVT_MIN_V_PORCH_RND; | |
f6747658 | 495 | v_bp = (CVT_MIN_VSYNC_BP * hfreq) / 1000000 + 1 - vsync; |
25764158 HV |
496 | |
497 | if (v_bp < CVT_MIN_V_BPORCH) | |
498 | v_bp = CVT_MIN_V_BPORCH; | |
499 | } | |
061ddda6 PL |
500 | |
501 | if (interlaced) | |
502 | image_height = (frame_height - 2 * v_fp - 2 * vsync - 2 * v_bp) & ~0x1; | |
503 | else | |
504 | image_height = (frame_height - v_fp - vsync - v_bp + 1) & ~0x1; | |
25764158 | 505 | |
947ed99e PL |
506 | if (image_height < 0) |
507 | return false; | |
508 | ||
25764158 HV |
509 | /* Aspect ratio based on vsync */ |
510 | switch (vsync) { | |
511 | case 4: | |
512 | image_width = (image_height * 4) / 3; | |
513 | break; | |
514 | case 5: | |
515 | image_width = (image_height * 16) / 9; | |
516 | break; | |
517 | case 6: | |
518 | image_width = (image_height * 16) / 10; | |
519 | break; | |
520 | case 7: | |
521 | /* special case */ | |
522 | if (image_height == 1024) | |
523 | image_width = (image_height * 5) / 4; | |
524 | else if (image_height == 768) | |
525 | image_width = (image_height * 15) / 9; | |
526 | else | |
527 | return false; | |
528 | break; | |
5fea1bb7 PL |
529 | case 8: |
530 | image_width = active_width; | |
531 | break; | |
25764158 HV |
532 | default: |
533 | return false; | |
534 | } | |
535 | ||
5fea1bb7 PL |
536 | if (!rb_v2) |
537 | image_width = image_width & ~7; | |
25764158 HV |
538 | |
539 | /* Horizontal */ | |
540 | if (reduced_blanking) { | |
5fea1bb7 PL |
541 | int h_blank; |
542 | int clk_gran; | |
543 | ||
544 | h_blank = rb_v2 ? CVT_RB_V2_H_BLANK : CVT_RB_H_BLANK; | |
545 | clk_gran = rb_v2 ? CVT_PXL_CLK_GRAN_RB_V2 : CVT_PXL_CLK_GRAN; | |
546 | ||
547 | pix_clk = (image_width + h_blank) * hfreq; | |
548 | pix_clk = (pix_clk / clk_gran) * clk_gran; | |
25764158 | 549 | |
5fea1bb7 | 550 | h_bp = h_blank / 2; |
25764158 | 551 | hsync = CVT_RB_H_SYNC; |
5fea1bb7 | 552 | h_fp = h_blank - h_bp - hsync; |
25764158 | 553 | |
5fea1bb7 | 554 | frame_width = image_width + h_blank; |
25764158 | 555 | } else { |
c3e75c7d MB |
556 | unsigned ideal_duty_cycle_per_myriad = |
557 | 100 * CVT_C_PRIME - (CVT_M_PRIME * 100000) / hfreq; | |
25764158 | 558 | int h_blank; |
25764158 | 559 | |
c3e75c7d MB |
560 | if (ideal_duty_cycle_per_myriad < 2000) |
561 | ideal_duty_cycle_per_myriad = 2000; | |
25764158 | 562 | |
c3e75c7d MB |
563 | h_blank = image_width * ideal_duty_cycle_per_myriad / |
564 | (10000 - ideal_duty_cycle_per_myriad); | |
565 | h_blank = (h_blank / (2 * CVT_CELL_GRAN)) * 2 * CVT_CELL_GRAN; | |
25764158 HV |
566 | |
567 | pix_clk = (image_width + h_blank) * hfreq; | |
568 | pix_clk = (pix_clk / CVT_PXL_CLK_GRAN) * CVT_PXL_CLK_GRAN; | |
569 | ||
570 | h_bp = h_blank / 2; | |
571 | frame_width = image_width + h_blank; | |
572 | ||
9c3f2052 | 573 | hsync = frame_width * CVT_HSYNC_PERCENT / 100; |
d7ed5a3d | 574 | hsync = (hsync / CVT_CELL_GRAN) * CVT_CELL_GRAN; |
25764158 HV |
575 | h_fp = h_blank - hsync - h_bp; |
576 | } | |
577 | ||
074ca43f | 578 | fmt->type = V4L2_DV_BT_656_1120; |
25764158 HV |
579 | fmt->bt.polarities = polarities; |
580 | fmt->bt.width = image_width; | |
581 | fmt->bt.height = image_height; | |
582 | fmt->bt.hfrontporch = h_fp; | |
583 | fmt->bt.vfrontporch = v_fp; | |
584 | fmt->bt.hsync = hsync; | |
585 | fmt->bt.vsync = vsync; | |
586 | fmt->bt.hbackporch = frame_width - image_width - h_fp - hsync; | |
061ddda6 PL |
587 | |
588 | if (!interlaced) { | |
589 | fmt->bt.vbackporch = frame_height - image_height - v_fp - vsync; | |
590 | fmt->bt.interlaced = V4L2_DV_PROGRESSIVE; | |
591 | } else { | |
592 | fmt->bt.vbackporch = (frame_height - image_height - 2 * v_fp - | |
593 | 2 * vsync) / 2; | |
594 | fmt->bt.il_vbackporch = frame_height - image_height - 2 * v_fp - | |
595 | 2 * vsync - fmt->bt.vbackporch; | |
596 | fmt->bt.il_vfrontporch = v_fp; | |
597 | fmt->bt.il_vsync = vsync; | |
598 | fmt->bt.flags |= V4L2_DV_FL_HALF_LINE; | |
599 | fmt->bt.interlaced = V4L2_DV_INTERLACED; | |
600 | } | |
601 | ||
25764158 HV |
602 | fmt->bt.pixelclock = pix_clk; |
603 | fmt->bt.standards = V4L2_DV_BT_STD_CVT; | |
061ddda6 | 604 | |
25764158 HV |
605 | if (reduced_blanking) |
606 | fmt->bt.flags |= V4L2_DV_FL_REDUCED_BLANKING; | |
061ddda6 | 607 | |
25764158 HV |
608 | return true; |
609 | } | |
610 | EXPORT_SYMBOL_GPL(v4l2_detect_cvt); | |
611 | ||
612 | /* | |
613 | * GTF defines | |
614 | * Based on Generalized Timing Formula Standard | |
615 | * Version 1.1 September 2, 1999 | |
616 | */ | |
617 | ||
618 | #define GTF_PXL_CLK_GRAN 250000 /* pixel clock granularity */ | |
619 | ||
620 | #define GTF_MIN_VSYNC_BP 550 /* min time of vsync + back porch (us) */ | |
621 | #define GTF_V_FP 1 /* vertical front porch (lines) */ | |
622 | #define GTF_CELL_GRAN 8 /* character cell granularity */ | |
623 | ||
624 | /* Default */ | |
625 | #define GTF_D_M 600 /* blanking formula gradient */ | |
626 | #define GTF_D_C 40 /* blanking formula offset */ | |
627 | #define GTF_D_K 128 /* blanking formula scaling factor */ | |
628 | #define GTF_D_J 20 /* blanking formula scaling factor */ | |
629 | #define GTF_D_C_PRIME ((((GTF_D_C - GTF_D_J) * GTF_D_K) / 256) + GTF_D_J) | |
630 | #define GTF_D_M_PRIME ((GTF_D_K * GTF_D_M) / 256) | |
631 | ||
632 | /* Secondary */ | |
633 | #define GTF_S_M 3600 /* blanking formula gradient */ | |
634 | #define GTF_S_C 40 /* blanking formula offset */ | |
635 | #define GTF_S_K 128 /* blanking formula scaling factor */ | |
636 | #define GTF_S_J 35 /* blanking formula scaling factor */ | |
637 | #define GTF_S_C_PRIME ((((GTF_S_C - GTF_S_J) * GTF_S_K) / 256) + GTF_S_J) | |
638 | #define GTF_S_M_PRIME ((GTF_S_K * GTF_S_M) / 256) | |
639 | ||
640 | /** v4l2_detect_gtf - detect if the given timings follow the GTF standard | |
641 | * @frame_height - the total height of the frame (including blanking) in lines. | |
642 | * @hfreq - the horizontal frequency in Hz. | |
643 | * @vsync - the height of the vertical sync in lines. | |
644 | * @polarities - the horizontal and vertical polarities (same as struct | |
645 | * v4l2_bt_timings polarities). | |
061ddda6 | 646 | * @interlaced - if this flag is true, it indicates interlaced format |
25764158 HV |
647 | * @aspect - preferred aspect ratio. GTF has no method of determining the |
648 | * aspect ratio in order to derive the image width from the | |
649 | * image height, so it has to be passed explicitly. Usually | |
650 | * the native screen aspect ratio is used for this. If it | |
651 | * is not filled in correctly, then 16:9 will be assumed. | |
652 | * @fmt - the resulting timings. | |
653 | * | |
654 | * This function will attempt to detect if the given values correspond to a | |
655 | * valid GTF format. If so, then it will return true, and fmt will be filled | |
656 | * in with the found GTF timings. | |
657 | */ | |
658 | bool v4l2_detect_gtf(unsigned frame_height, | |
659 | unsigned hfreq, | |
660 | unsigned vsync, | |
661 | u32 polarities, | |
061ddda6 | 662 | bool interlaced, |
25764158 HV |
663 | struct v4l2_fract aspect, |
664 | struct v4l2_dv_timings *fmt) | |
665 | { | |
666 | int pix_clk; | |
667 | int v_fp, v_bp, h_fp, hsync; | |
668 | int frame_width, image_height, image_width; | |
669 | bool default_gtf; | |
670 | int h_blank; | |
671 | ||
672 | if (vsync != 3) | |
673 | return false; | |
674 | ||
675 | if (polarities == V4L2_DV_VSYNC_POS_POL) | |
676 | default_gtf = true; | |
677 | else if (polarities == V4L2_DV_HSYNC_POS_POL) | |
678 | default_gtf = false; | |
679 | else | |
680 | return false; | |
681 | ||
947ed99e PL |
682 | if (hfreq == 0) |
683 | return false; | |
684 | ||
25764158 HV |
685 | /* Vertical */ |
686 | v_fp = GTF_V_FP; | |
f6747658 | 687 | v_bp = (GTF_MIN_VSYNC_BP * hfreq + 500000) / 1000000 - vsync; |
061ddda6 PL |
688 | if (interlaced) |
689 | image_height = (frame_height - 2 * v_fp - 2 * vsync - 2 * v_bp) & ~0x1; | |
690 | else | |
691 | image_height = (frame_height - v_fp - vsync - v_bp + 1) & ~0x1; | |
25764158 | 692 | |
947ed99e PL |
693 | if (image_height < 0) |
694 | return false; | |
695 | ||
25764158 HV |
696 | if (aspect.numerator == 0 || aspect.denominator == 0) { |
697 | aspect.numerator = 16; | |
698 | aspect.denominator = 9; | |
699 | } | |
700 | image_width = ((image_height * aspect.numerator) / aspect.denominator); | |
257cc4b5 | 701 | image_width = (image_width + GTF_CELL_GRAN/2) & ~(GTF_CELL_GRAN - 1); |
25764158 HV |
702 | |
703 | /* Horizontal */ | |
c9bc9f50 PL |
704 | if (default_gtf) { |
705 | u64 num; | |
706 | u32 den; | |
707 | ||
708 | num = ((image_width * GTF_D_C_PRIME * (u64)hfreq) - | |
709 | ((u64)image_width * GTF_D_M_PRIME * 1000)); | |
dc0cf4cf PL |
710 | den = (hfreq * (100 - GTF_D_C_PRIME) + GTF_D_M_PRIME * 1000) * |
711 | (2 * GTF_CELL_GRAN); | |
c9bc9f50 | 712 | h_blank = div_u64((num + (den >> 1)), den); |
dc0cf4cf | 713 | h_blank *= (2 * GTF_CELL_GRAN); |
c9bc9f50 PL |
714 | } else { |
715 | u64 num; | |
716 | u32 den; | |
717 | ||
718 | num = ((image_width * GTF_S_C_PRIME * (u64)hfreq) - | |
719 | ((u64)image_width * GTF_S_M_PRIME * 1000)); | |
dc0cf4cf PL |
720 | den = (hfreq * (100 - GTF_S_C_PRIME) + GTF_S_M_PRIME * 1000) * |
721 | (2 * GTF_CELL_GRAN); | |
c9bc9f50 | 722 | h_blank = div_u64((num + (den >> 1)), den); |
dc0cf4cf | 723 | h_blank *= (2 * GTF_CELL_GRAN); |
c9bc9f50 | 724 | } |
25764158 | 725 | |
25764158 HV |
726 | frame_width = image_width + h_blank; |
727 | ||
728 | pix_clk = (image_width + h_blank) * hfreq; | |
729 | pix_clk = pix_clk / GTF_PXL_CLK_GRAN * GTF_PXL_CLK_GRAN; | |
730 | ||
731 | hsync = (frame_width * 8 + 50) / 100; | |
d7ed5a3d | 732 | hsync = ((hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN) * GTF_CELL_GRAN; |
25764158 HV |
733 | |
734 | h_fp = h_blank / 2 - hsync; | |
735 | ||
074ca43f | 736 | fmt->type = V4L2_DV_BT_656_1120; |
25764158 HV |
737 | fmt->bt.polarities = polarities; |
738 | fmt->bt.width = image_width; | |
739 | fmt->bt.height = image_height; | |
740 | fmt->bt.hfrontporch = h_fp; | |
741 | fmt->bt.vfrontporch = v_fp; | |
742 | fmt->bt.hsync = hsync; | |
743 | fmt->bt.vsync = vsync; | |
744 | fmt->bt.hbackporch = frame_width - image_width - h_fp - hsync; | |
061ddda6 PL |
745 | |
746 | if (!interlaced) { | |
747 | fmt->bt.vbackporch = frame_height - image_height - v_fp - vsync; | |
748 | fmt->bt.interlaced = V4L2_DV_PROGRESSIVE; | |
749 | } else { | |
750 | fmt->bt.vbackporch = (frame_height - image_height - 2 * v_fp - | |
751 | 2 * vsync) / 2; | |
752 | fmt->bt.il_vbackporch = frame_height - image_height - 2 * v_fp - | |
753 | 2 * vsync - fmt->bt.vbackporch; | |
754 | fmt->bt.il_vfrontporch = v_fp; | |
755 | fmt->bt.il_vsync = vsync; | |
756 | fmt->bt.flags |= V4L2_DV_FL_HALF_LINE; | |
757 | fmt->bt.interlaced = V4L2_DV_INTERLACED; | |
758 | } | |
759 | ||
25764158 HV |
760 | fmt->bt.pixelclock = pix_clk; |
761 | fmt->bt.standards = V4L2_DV_BT_STD_GTF; | |
061ddda6 | 762 | |
25764158 HV |
763 | if (!default_gtf) |
764 | fmt->bt.flags |= V4L2_DV_FL_REDUCED_BLANKING; | |
061ddda6 | 765 | |
25764158 HV |
766 | return true; |
767 | } | |
768 | EXPORT_SYMBOL_GPL(v4l2_detect_gtf); | |
769 | ||
770 | /** v4l2_calc_aspect_ratio - calculate the aspect ratio based on bytes | |
771 | * 0x15 and 0x16 from the EDID. | |
772 | * @hor_landscape - byte 0x15 from the EDID. | |
773 | * @vert_portrait - byte 0x16 from the EDID. | |
774 | * | |
775 | * Determines the aspect ratio from the EDID. | |
776 | * See VESA Enhanced EDID standard, release A, rev 2, section 3.6.2: | |
777 | * "Horizontal and Vertical Screen Size or Aspect Ratio" | |
778 | */ | |
779 | struct v4l2_fract v4l2_calc_aspect_ratio(u8 hor_landscape, u8 vert_portrait) | |
780 | { | |
781 | struct v4l2_fract aspect = { 16, 9 }; | |
25764158 HV |
782 | u8 ratio; |
783 | ||
784 | /* Nothing filled in, fallback to 16:9 */ | |
785 | if (!hor_landscape && !vert_portrait) | |
786 | return aspect; | |
787 | /* Both filled in, so they are interpreted as the screen size in cm */ | |
788 | if (hor_landscape && vert_portrait) { | |
789 | aspect.numerator = hor_landscape; | |
790 | aspect.denominator = vert_portrait; | |
791 | return aspect; | |
792 | } | |
793 | /* Only one is filled in, so interpret them as a ratio: | |
794 | (val + 99) / 100 */ | |
795 | ratio = hor_landscape | vert_portrait; | |
796 | /* Change some rounded values into the exact aspect ratio */ | |
797 | if (ratio == 79) { | |
798 | aspect.numerator = 16; | |
799 | aspect.denominator = 9; | |
800 | } else if (ratio == 34) { | |
801 | aspect.numerator = 4; | |
f71920ef | 802 | aspect.denominator = 3; |
25764158 HV |
803 | } else if (ratio == 68) { |
804 | aspect.numerator = 15; | |
f71920ef | 805 | aspect.denominator = 9; |
25764158 HV |
806 | } else { |
807 | aspect.numerator = hor_landscape + 99; | |
808 | aspect.denominator = 100; | |
809 | } | |
810 | if (hor_landscape) | |
811 | return aspect; | |
812 | /* The aspect ratio is for portrait, so swap numerator and denominator */ | |
fd752429 | 813 | swap(aspect.denominator, aspect.numerator); |
25764158 HV |
814 | return aspect; |
815 | } | |
816 | EXPORT_SYMBOL_GPL(v4l2_calc_aspect_ratio); |