1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
|
/*
* vimc-core.c Virtual Media Controller Driver
*
* Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/component.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <media/media-device.h>
#include <media/v4l2-device.h>
#include "vimc-common.h"
#define VIMC_MDEV_MODEL_NAME "VIMC MDEV"
#define VIMC_ENT_LINK(src, srcpad, sink, sinkpad, link_flags) { \
.src_ent = src, \
.src_pad = srcpad, \
.sink_ent = sink, \
.sink_pad = sinkpad, \
.flags = link_flags, \
}
struct vimc_device {
/* The platform device */
struct platform_device pdev;
/* The pipeline configuration */
const struct vimc_pipeline_config *pipe_cfg;
/* The Associated media_device parent */
struct media_device mdev;
/* Internal v4l2 parent device*/
struct v4l2_device v4l2_dev;
/* Subdevices */
struct platform_device **subdevs;
};
/* Structure which describes individual configuration for each entity */
struct vimc_ent_config {
const char *name;
const char *drv;
};
/* Structure which describes links between entities */
struct vimc_ent_link {
unsigned int src_ent;
u16 src_pad;
unsigned int sink_ent;
u16 sink_pad;
u32 flags;
};
/* Structure which describes the whole topology */
struct vimc_pipeline_config {
const struct vimc_ent_config *ents;
size_t num_ents;
const struct vimc_ent_link *links;
size_t num_links;
};
/* --------------------------------------------------------------------------
* Topology Configuration
*/
static const struct vimc_ent_config ent_config[] = {
{
.name = "Sensor A",
.drv = "vimc-sensor",
},
{
.name = "Sensor B",
.drv = "vimc-sensor",
},
{
.name = "Debayer A",
.drv = "vimc-debayer",
},
{
.name = "Debayer B",
.drv = "vimc-debayer",
},
{
.name = "Raw Capture 0",
.drv = "vimc-capture",
},
{
.name = "Raw Capture 1",
.drv = "vimc-capture",
},
{
.name = "RGB/YUV Input",
/* TODO: change this to vimc-input when it is implemented */
.drv = "vimc-sensor",
},
{
.name = "Scaler",
.drv = "vimc-scaler",
},
{
.name = "RGB/YUV Capture",
.drv = "vimc-capture",
},
};
static const struct vimc_ent_link ent_links[] = {
/* Link: Sensor A (Pad 0)->(Pad 0) Debayer A */
VIMC_ENT_LINK(0, 0, 2, 0, MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE),
/* Link: Sensor A (Pad 0)->(Pad 0) Raw Capture 0 */
VIMC_ENT_LINK(0, 0, 4, 0, MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE),
/* Link: Sensor B (Pad 0)->(Pad 0) Debayer B */
VIMC_ENT_LINK(1, 0, 3, 0, MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE),
/* Link: Sensor B (Pad 0)->(Pad 0) Raw Capture 1 */
VIMC_ENT_LINK(1, 0, 5, 0, MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE),
/* Link: Debayer A (Pad 1)->(Pad 0) Scaler */
VIMC_ENT_LINK(2, 1, 7, 0, MEDIA_LNK_FL_ENABLED),
/* Link: Debayer B (Pad 1)->(Pad 0) Scaler */
VIMC_ENT_LINK(3, 1, 7, 0, 0),
/* Link: RGB/YUV Input (Pad 0)->(Pad 0) Scaler */
VIMC_ENT_LINK(6, 0, 7, 0, 0),
/* Link: Scaler (Pad 1)->(Pad 0) RGB/YUV Capture */
VIMC_ENT_LINK(7, 1, 8, 0, MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE),
};
static const struct vimc_pipeline_config pipe_cfg = {
.ents = ent_config,
.num_ents = ARRAY_SIZE(ent_config),
.links = ent_links,
.num_links = ARRAY_SIZE(ent_links)
};
/* -------------------------------------------------------------------------- */
static int vimc_create_links(struct vimc_device *vimc)
{
unsigned int i;
int ret;
/* Initialize the links between entities */
for (i = 0; i < vimc->pipe_cfg->num_links; i++) {
const struct vimc_ent_link *link = &vimc->pipe_cfg->links[i];
/*
* TODO: Check another way of retrieving ved struct without
* relying on platform_get_drvdata
*/
struct vimc_ent_device *ved_src =
platform_get_drvdata(vimc->subdevs[link->src_ent]);
struct vimc_ent_device *ved_sink =
platform_get_drvdata(vimc->subdevs[link->sink_ent]);
ret = media_create_pad_link(ved_src->ent, link->src_pad,
ved_sink->ent, link->sink_pad,
link->flags);
if (ret)
return ret;
}
return 0;
}
static int vimc_comp_bind(struct device *master)
{
struct vimc_device *vimc = container_of(to_platform_device(master),
struct vimc_device, pdev);
int ret;
dev_dbg(master, "bind");
/* Register the v4l2 struct */
ret = v4l2_device_register(vimc->mdev.dev, &vimc->v4l2_dev);
if (ret) {
dev_err(vimc->mdev.dev,
"v4l2 device register failed (err=%d)\n", ret);
return ret;
}
/* Bind subdevices */
ret = component_bind_all(master, &vimc->v4l2_dev);
if (ret)
goto err_v4l2_unregister;
/* Initialize links */
ret = vimc_create_links(vimc);
if (ret)
goto err_comp_unbind_all;
/* Register the media device */
ret = media_device_register(&vimc->mdev);
if (ret) {
dev_err(vimc->mdev.dev,
"media device register failed (err=%d)\n", ret);
goto err_comp_unbind_all;
}
/* Expose all subdev's nodes*/
ret = v4l2_device_register_subdev_nodes(&vimc->v4l2_dev);
if (ret) {
dev_err(vimc->mdev.dev,
"vimc subdev nodes registration failed (err=%d)\n",
ret);
goto err_mdev_unregister;
}
return 0;
err_mdev_unregister:
media_device_unregister(&vimc->mdev);
media_device_cleanup(&vimc->mdev);
err_comp_unbind_all:
component_unbind_all(master, NULL);
err_v4l2_unregister:
v4l2_device_unregister(&vimc->v4l2_dev);
return ret;
}
static void vimc_comp_unbind(struct device *master)
{
struct vimc_device *vimc = container_of(to_platform_device(master),
struct vimc_device, pdev);
dev_dbg(master, "unbind");
media_device_unregister(&vimc->mdev);
media_device_cleanup(&vimc->mdev);
component_unbind_all(master, NULL);
v4l2_device_unregister(&vimc->v4l2_dev);
}
static int vimc_comp_compare(struct device *comp, void *data)
{
const struct platform_device *pdev = to_platform_device(comp);
const char *name = data;
return !strcmp(pdev->dev.platform_data, name);
}
static struct component_match *vimc_add_subdevs(struct vimc_device *vimc)
{
struct component_match *match = NULL;
struct vimc_platform_data pdata;
int i;
for (i = 0; i < vimc->pipe_cfg->num_ents; i++) {
dev_dbg(&vimc->pdev.dev, "new pdev for %s\n",
vimc->pipe_cfg->ents[i].drv);
strscpy(pdata.entity_name, vimc->pipe_cfg->ents[i].name,
sizeof(pdata.entity_name));
vimc->subdevs[i] = platform_device_register_data(&vimc->pdev.dev,
vimc->pipe_cfg->ents[i].drv,
PLATFORM_DEVID_AUTO,
&pdata,
sizeof(pdata));
if (IS_ERR(vimc->subdevs[i])) {
match = ERR_CAST(vimc->subdevs[i]);
while (--i >= 0)
platform_device_unregister(vimc->subdevs[i]);
return match;
}
component_match_add(&vimc->pdev.dev, &match, vimc_comp_compare,
(void *)vimc->pipe_cfg->ents[i].name);
}
return match;
}
static void vimc_rm_subdevs(struct vimc_device *vimc)
{
|