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Merge branch 'stable-4.7' of git://git.infradead.org/users/pcmoore/audit
[deliverable/linux.git] / drivers / media / platform / s5p-tv / mixer_video.c
CommitLineData
fef1c8d0
TS		 1/*
2 * Samsung TV Mixer driver
3 *
4 * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
5 *
6 * Tomasz Stanislawski, <t.stanislaws@samsung.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published
10 * by the Free Software Foundation. either version 2 of the License,
11 * or (at your option) any later version
12 */
13
f5c99037
SK		 14#define pr_fmt(fmt) "s5p-tv (mixer): " fmt
15
fef1c8d0
TS		 16#include "mixer.h"
17
18#include <media/v4l2-ioctl.h>
19#include <linux/videodev2.h>
20#include <linux/mm.h>
fc8ac777 21#include <linux/module.h>
3e58ac14 22#include <linux/platform_device.h>
fef1c8d0
TS		 23#include <linux/timer.h>
24#include <media/videobuf2-dma-contig.h>
25
26static int find_reg_callback(struct device *dev, void *p)
27{
28 struct v4l2_subdev **sd = p;
29
30 *sd = dev_get_drvdata(dev);
31 /* non-zero value stops iteration */
32 return 1;
33}
34
35static struct v4l2_subdev *find_and_register_subdev(
36 struct mxr_device *mdev, char *module_name)
37{
38 struct device_driver *drv;
39 struct v4l2_subdev *sd = NULL;
40 int ret;
41
42 /* TODO: add waiting until probe is finished */
43 drv = driver_find(module_name, &platform_bus_type);
44 if (!drv) {
45 mxr_warn(mdev, "module %s is missing\n", module_name);
46 return NULL;
47 }
48 /* driver refcnt is increased, it is safe to iterate over devices */
49 ret = driver_for_each_device(drv, NULL, &sd, find_reg_callback);
50 /* ret == 0 means that find_reg_callback was never executed */
51 if (sd == NULL) {
52 mxr_warn(mdev, "module %s provides no subdev!\n", module_name);
53 goto done;
54 }
55 /* v4l2_device_register_subdev detects if sd is NULL */
56 ret = v4l2_device_register_subdev(&mdev->v4l2_dev, sd);
57 if (ret) {
58 mxr_warn(mdev, "failed to register subdev %s\n", sd->name);
59 sd = NULL;
60 }
61
62done:
fef1c8d0
TS		 63 return sd;
64}
65
4c62e976
GKH		 66int mxr_acquire_video(struct mxr_device *mdev,
67 struct mxr_output_conf *output_conf, int output_count)
fef1c8d0
TS		 68{
69 struct device *dev = mdev->dev;
70 struct v4l2_device *v4l2_dev = &mdev->v4l2_dev;
71 int i;
72 int ret = 0;
73 struct v4l2_subdev *sd;
74
75 strlcpy(v4l2_dev->name, dev_name(mdev->dev), sizeof(v4l2_dev->name));
76 /* prepare context for V4L2 device */
77 ret = v4l2_device_register(dev, v4l2_dev);
78 if (ret) {
79 mxr_err(mdev, "could not register v4l2 device.\n");
80 goto fail;
81 }
82
83 mdev->alloc_ctx = vb2_dma_contig_init_ctx(mdev->dev);
6a2f18cf 84 if (IS_ERR(mdev->alloc_ctx)) {
fef1c8d0 85 mxr_err(mdev, "could not acquire vb2 allocator\n");
6a2f18cf 86 ret = PTR_ERR(mdev->alloc_ctx);
fef1c8d0
TS		 87 goto fail_v4l2_dev;
88 }
89
90 /* registering outputs */
91 mdev->output_cnt = 0;
92 for (i = 0; i < output_count; ++i) {
93 struct mxr_output_conf *conf = &output_conf[i];
94 struct mxr_output *out;
95
96 sd = find_and_register_subdev(mdev, conf->module_name);
97 /* trying to register next output */
98 if (sd == NULL)
99 continue;
c0d51204 100 out = kzalloc(sizeof(*out), GFP_KERNEL);
fef1c8d0
TS		 101 if (out == NULL) {
102 mxr_err(mdev, "no memory for '%s'\n",
103 conf->output_name);
104 ret = -ENOMEM;
105 /* registered subdevs are removed in fail_v4l2_dev */
106 goto fail_output;
107 }
108 strlcpy(out->name, conf->output_name, sizeof(out->name));
109 out->sd = sd;
110 out->cookie = conf->cookie;
111 mdev->output[mdev->output_cnt++] = out;
112 mxr_info(mdev, "added output '%s' from module '%s'\n",
113 conf->output_name, conf->module_name);
114 /* checking if maximal number of outputs is reached */
115 if (mdev->output_cnt >= MXR_MAX_OUTPUTS)
116 break;
117 }
118
119 if (mdev->output_cnt == 0) {
120 mxr_err(mdev, "failed to register any output\n");
121 ret = -ENODEV;
122 /* skipping fail_output because there is nothing to free */
123 goto fail_vb2_allocator;
124 }
125
126 return 0;
127
128fail_output:
129 /* kfree is NULL-safe */
130 for (i = 0; i < mdev->output_cnt; ++i)
131 kfree(mdev->output[i]);
c0d51204 132 memset(mdev->output, 0, sizeof(mdev->output));
fef1c8d0
TS		 133
134fail_vb2_allocator:
135 /* freeing allocator context */
136 vb2_dma_contig_cleanup_ctx(mdev->alloc_ctx);
137
138fail_v4l2_dev:
139 /* NOTE: automatically unregister all subdevs */
140 v4l2_device_unregister(v4l2_dev);
141
142fail:
143 return ret;
144}
145
e6364a98 146void mxr_release_video(struct mxr_device *mdev)
fef1c8d0
TS		 147{
148 int i;
149
150 /* kfree is NULL-safe */
151 for (i = 0; i < mdev->output_cnt; ++i)
152 kfree(mdev->output[i]);
153
154 vb2_dma_contig_cleanup_ctx(mdev->alloc_ctx);
155 v4l2_device_unregister(&mdev->v4l2_dev);
156}
157
158static int mxr_querycap(struct file *file, void *priv,
159 struct v4l2_capability *cap)
160{
161 struct mxr_layer *layer = video_drvdata(file);
162
163 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
164
c0d51204
SK		 165 strlcpy(cap->driver, MXR_DRIVER_NAME, sizeof(cap->driver));
166 strlcpy(cap->card, layer->vfd.name, sizeof(cap->card));
fef1c8d0 167 sprintf(cap->bus_info, "%d", layer->idx);
7208507e
SN		 168 cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
169 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
fef1c8d0
TS		 170
171 return 0;
172}
173
0d066d3f 174static void mxr_geometry_dump(struct mxr_device *mdev, struct mxr_geometry *geo)
fef1c8d0 175{
0d066d3f
TS		 176 mxr_dbg(mdev, "src.full_size = (%u, %u)\n",
177 geo->src.full_width, geo->src.full_height);
178 mxr_dbg(mdev, "src.size = (%u, %u)\n",
179 geo->src.width, geo->src.height);
180 mxr_dbg(mdev, "src.offset = (%u, %u)\n",
181 geo->src.x_offset, geo->src.y_offset);
182 mxr_dbg(mdev, "dst.full_size = (%u, %u)\n",
183 geo->dst.full_width, geo->dst.full_height);
184 mxr_dbg(mdev, "dst.size = (%u, %u)\n",
185 geo->dst.width, geo->dst.height);
186 mxr_dbg(mdev, "dst.offset = (%u, %u)\n",
187 geo->dst.x_offset, geo->dst.y_offset);
188 mxr_dbg(mdev, "ratio = (%u, %u)\n",
189 geo->x_ratio, geo->y_ratio);
fef1c8d0
TS		 190}
191
192static void mxr_layer_default_geo(struct mxr_layer *layer)
193{
194 struct mxr_device *mdev = layer->mdev;
195 struct v4l2_mbus_framefmt mbus_fmt;
196
c0d51204 197 memset(&layer->geo, 0, sizeof(layer->geo));
fef1c8d0
TS		 198
199 mxr_get_mbus_fmt(mdev, &mbus_fmt);
200
201 layer->geo.dst.full_width = mbus_fmt.width;
202 layer->geo.dst.full_height = mbus_fmt.height;
203 layer->geo.dst.width = layer->geo.dst.full_width;
204 layer->geo.dst.height = layer->geo.dst.full_height;
205 layer->geo.dst.field = mbus_fmt.field;
206
207 layer->geo.src.full_width = mbus_fmt.width;
208 layer->geo.src.full_height = mbus_fmt.height;
209 layer->geo.src.width = layer->geo.src.full_width;
210 layer->geo.src.height = layer->geo.src.full_height;
211
0d066d3f
TS		 212 mxr_geometry_dump(mdev, &layer->geo);
213 layer->ops.fix_geometry(layer, MXR_GEOMETRY_SINK, 0);
214 mxr_geometry_dump(mdev, &layer->geo);
fef1c8d0
TS		 215}
216
0d066d3f 217static void mxr_layer_update_output(struct mxr_layer *layer)
fef1c8d0 218{
0d066d3f
TS		 219 struct mxr_device *mdev = layer->mdev;
220 struct v4l2_mbus_framefmt mbus_fmt;
221
222 mxr_get_mbus_fmt(mdev, &mbus_fmt);
223 /* checking if update is needed */
224 if (layer->geo.dst.full_width == mbus_fmt.width &&
225 layer->geo.dst.full_height == mbus_fmt.width)
226 return;
fef1c8d0 227
0d066d3f
TS		 228 layer->geo.dst.full_width = mbus_fmt.width;
229 layer->geo.dst.full_height = mbus_fmt.height;
230 layer->geo.dst.field = mbus_fmt.field;
231 layer->ops.fix_geometry(layer, MXR_GEOMETRY_SINK, 0);
232
233 mxr_geometry_dump(mdev, &layer->geo);
234}
fef1c8d0
TS		 235
236static const struct mxr_format *find_format_by_fourcc(
237 struct mxr_layer *layer, unsigned long fourcc);
238static const struct mxr_format *find_format_by_index(
239 struct mxr_layer *layer, unsigned long index);
240
241static int mxr_enum_fmt(struct file *file, void *priv,
242 struct v4l2_fmtdesc *f)
243{
244 struct mxr_layer *layer = video_drvdata(file);
245 struct mxr_device *mdev = layer->mdev;
246 const struct mxr_format *fmt;
247
248 mxr_dbg(mdev, "%s\n", __func__);
249 fmt = find_format_by_index(layer, f->index);
250 if (fmt == NULL)
251 return -EINVAL;
252
253 strlcpy(f->description, fmt->name, sizeof(f->description));
254 f->pixelformat = fmt->fourcc;
255
256 return 0;
257}
258
fef1c8d0
TS		 259static unsigned int divup(unsigned int divident, unsigned int divisor)
260{
261 return (divident + divisor - 1) / divisor;
262}
263
264unsigned long mxr_get_plane_size(const struct mxr_block *blk,
265 unsigned int width, unsigned int height)
266{
267 unsigned int bl_width = divup(width, blk->width);
268 unsigned int bl_height = divup(height, blk->height);
269
270 return bl_width * bl_height * blk->size;
271}
272
273static void mxr_mplane_fill(struct v4l2_plane_pix_format *planes,
274 const struct mxr_format *fmt, u32 width, u32 height)
275{
276 int i;
277
0d066d3f
TS		 278 /* checking if nothing to fill */
279 if (!planes)
280 return;
281
fef1c8d0
TS		 282 memset(planes, 0, sizeof(*planes) * fmt->num_subframes);
283 for (i = 0; i < fmt->num_planes; ++i) {
284 struct v4l2_plane_pix_format *plane = planes
285 + fmt->plane2subframe[i];
286 const struct mxr_block *blk = &fmt->plane[i];
287 u32 bl_width = divup(width, blk->width);
288 u32 bl_height = divup(height, blk->height);
289 u32 sizeimage = bl_width * bl_height * blk->size;
cc7d2dfb 290 u32 bytesperline = bl_width * blk->size / blk->height;
fef1c8d0
TS		 291
292 plane->sizeimage += sizeimage;
293 plane->bytesperline = max(plane->bytesperline, bytesperline);
294 }
295}
296
297static int mxr_g_fmt(struct file *file, void *priv,
298 struct v4l2_format *f)
299{
300 struct mxr_layer *layer = video_drvdata(file);
301 struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
302
303 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
304
305 pix->width = layer->geo.src.full_width;
306 pix->height = layer->geo.src.full_height;
307 pix->field = V4L2_FIELD_NONE;
308 pix->pixelformat = layer->fmt->fourcc;
309 pix->colorspace = layer->fmt->colorspace;
310 mxr_mplane_fill(pix->plane_fmt, layer->fmt, pix->width, pix->height);
311
312 return 0;
313}
314
0d066d3f
TS		 315static int mxr_s_fmt(struct file *file, void *priv,
316 struct v4l2_format *f)
fef1c8d0
TS		 317{
318 struct mxr_layer *layer = video_drvdata(file);
0d066d3f
TS		 319 const struct mxr_format *fmt;
320 struct v4l2_pix_format_mplane *pix;
321 struct mxr_device *mdev = layer->mdev;
322 struct mxr_geometry *geo = &layer->geo;
fef1c8d0 323
0d066d3f
TS		 324 mxr_dbg(mdev, "%s:%d\n", __func__, __LINE__);
325
326 pix = &f->fmt.pix_mp;
327 fmt = find_format_by_fourcc(layer, pix->pixelformat);
328 if (fmt == NULL) {
329 mxr_warn(mdev, "not recognized fourcc: %08x\n",
330 pix->pixelformat);
fef1c8d0 331 return -EINVAL;
0d066d3f
TS		 332 }
333 layer->fmt = fmt;
334 /* set source size to highest accepted value */
335 geo->src.full_width = max(geo->dst.full_width, pix->width);
336 geo->src.full_height = max(geo->dst.full_height, pix->height);
337 layer->ops.fix_geometry(layer, MXR_GEOMETRY_SOURCE, 0);
338 mxr_geometry_dump(mdev, &layer->geo);
339 /* set cropping to total visible screen */
340 geo->src.width = pix->width;
341 geo->src.height = pix->height;
342 geo->src.x_offset = 0;
343 geo->src.y_offset = 0;
344 /* assure consistency of geometry */
345 layer->ops.fix_geometry(layer, MXR_GEOMETRY_CROP, MXR_NO_OFFSET);
346 mxr_geometry_dump(mdev, &layer->geo);
347 /* set full size to lowest possible value */
348 geo->src.full_width = 0;
349 geo->src.full_height = 0;
350 layer->ops.fix_geometry(layer, MXR_GEOMETRY_SOURCE, 0);
351 mxr_geometry_dump(mdev, &layer->geo);
352
353 /* returning results */
354 mxr_g_fmt(file, priv, f);
355
fef1c8d0
TS		 356 return 0;
357}
358
0d066d3f
TS		 359static int mxr_g_selection(struct file *file, void *fh,
360 struct v4l2_selection *s)
fef1c8d0
TS		 361{
362 struct mxr_layer *layer = video_drvdata(file);
0d066d3f 363 struct mxr_geometry *geo = &layer->geo;
fef1c8d0
TS		 364
365 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
0d066d3f
TS		 366
367 if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT &&
368 s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
369 return -EINVAL;
370
371 switch (s->target) {
c1334823 372 case V4L2_SEL_TGT_CROP:
0d066d3f
TS		 373 s->r.left = geo->src.x_offset;
374 s->r.top = geo->src.y_offset;
375 s->r.width = geo->src.width;
376 s->r.height = geo->src.height;
377 break;
378 case V4L2_SEL_TGT_CROP_DEFAULT:
379 case V4L2_SEL_TGT_CROP_BOUNDS:
380 s->r.left = 0;
381 s->r.top = 0;
382 s->r.width = geo->src.full_width;
383 s->r.height = geo->src.full_height;
384 break;
c1334823 385 case V4L2_SEL_TGT_COMPOSE:
0d066d3f
TS		 386 case V4L2_SEL_TGT_COMPOSE_PADDED:
387 s->r.left = geo->dst.x_offset;
388 s->r.top = geo->dst.y_offset;
389 s->r.width = geo->dst.width;
390 s->r.height = geo->dst.height;
391 break;
392 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
393 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
394 s->r.left = 0;
395 s->r.top = 0;
396 s->r.width = geo->dst.full_width;
397 s->r.height = geo->dst.full_height;
398 break;
399 default:
fef1c8d0 400 return -EINVAL;
0d066d3f
TS		 401 }
402
fef1c8d0
TS		 403 return 0;
404}
405
0d066d3f
TS		 406/* returns 1 if rectangle 'a' is inside 'b' */
407static int mxr_is_rect_inside(struct v4l2_rect *a, struct v4l2_rect *b)
408{
409 if (a->left < b->left)
410 return 0;
411 if (a->top < b->top)
412 return 0;
413 if (a->left + a->width > b->left + b->width)
414 return 0;
415 if (a->top + a->height > b->top + b->height)
416 return 0;
417 return 1;
418}
419
420static int mxr_s_selection(struct file *file, void *fh,
421 struct v4l2_selection *s)
fef1c8d0
TS		 422{
423 struct mxr_layer *layer = video_drvdata(file);
0d066d3f
TS		 424 struct mxr_geometry *geo = &layer->geo;
425 struct mxr_crop *target = NULL;
426 enum mxr_geometry_stage stage;
427 struct mxr_geometry tmp;
428 struct v4l2_rect res;
fef1c8d0 429
c0d51204 430 memset(&res, 0, sizeof(res));
0d066d3f
TS		 431
432 mxr_dbg(layer->mdev, "%s: rect: %dx%d@%d,%d\n", __func__,
433 s->r.width, s->r.height, s->r.left, s->r.top);
434
435 if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT &&
436 s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
fef1c8d0 437 return -EINVAL;
0d066d3f
TS		 438
439 switch (s->target) {
440 /* ignore read-only targets */
441 case V4L2_SEL_TGT_CROP_DEFAULT:
442 case V4L2_SEL_TGT_CROP_BOUNDS:
443 res.width = geo->src.full_width;
444 res.height = geo->src.full_height;
445 break;
446
447 /* ignore read-only targets */
448 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
449 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
450 res.width = geo->dst.full_width;
451 res.height = geo->dst.full_height;
452 break;
453
c1334823 454 case V4L2_SEL_TGT_CROP:
0d066d3f
TS		 455 target = &geo->src;
456 stage = MXR_GEOMETRY_CROP;
457 break;
c1334823 458 case V4L2_SEL_TGT_COMPOSE:
0d066d3f
TS		 459 case V4L2_SEL_TGT_COMPOSE_PADDED:
460 target = &geo->dst;
461 stage = MXR_GEOMETRY_COMPOSE;
462 break;
463 default:
464 return -EINVAL;
465 }
466 /* apply change and update geometry if needed */
467 if (target) {
468 /* backup current geometry if setup fails */
c0d51204 469 memcpy(&tmp, geo, sizeof(tmp));
0d066d3f
TS		 470
471 /* apply requested selection */
472 target->x_offset = s->r.left;
473 target->y_offset = s->r.top;
474 target->width = s->r.width;
475 target->height = s->r.height;
476
477 layer->ops.fix_geometry(layer, stage, s->flags);
478
479 /* retrieve update selection rectangle */
480 res.left = target->x_offset;
481 res.top = target->y_offset;
482 res.width = target->width;
483 res.height = target->height;
484
485 mxr_geometry_dump(layer->mdev, &layer->geo);
486 }
487
488 /* checking if the rectangle satisfies constraints */
489 if ((s->flags & V4L2_SEL_FLAG_LE) && !mxr_is_rect_inside(&res, &s->r))
490 goto fail;
491 if ((s->flags & V4L2_SEL_FLAG_GE) && !mxr_is_rect_inside(&s->r, &res))
492 goto fail;
493
494 /* return result rectangle */
495 s->r = res;
496
fef1c8d0 497 return 0;
0d066d3f
TS		 498fail:
499 /* restore old geometry, which is not touched if target is NULL */
500 if (target)
c0d51204 501 memcpy(geo, &tmp, sizeof(tmp));
0d066d3f 502 return -ERANGE;
fef1c8d0
TS		 503}
504
8e42bf03
HV		 505static int mxr_enum_dv_timings(struct file *file, void *fh,
506 struct v4l2_enum_dv_timings *timings)
507{
508 struct mxr_layer *layer = video_drvdata(file);
509 struct mxr_device *mdev = layer->mdev;
510 int ret;
511
78dc47bb
LP		 512 timings->pad = 0;
513
8e42bf03
HV		 514 /* lock protects from changing sd_out */
515 mutex_lock(&mdev->mutex);
78dc47bb 516 ret = v4l2_subdev_call(to_outsd(mdev), pad, enum_dv_timings, timings);
8e42bf03
HV		 517 mutex_unlock(&mdev->mutex);
518
519 return ret ? -EINVAL : 0;
520}
521
522static int mxr_s_dv_timings(struct file *file, void *fh,
523 struct v4l2_dv_timings *timings)
524{
525 struct mxr_layer *layer = video_drvdata(file);
526 struct mxr_device *mdev = layer->mdev;
527 int ret;
528
529 /* lock protects from changing sd_out */
530 mutex_lock(&mdev->mutex);
531
532 /* timings change cannot be done while there is an entity
39c1cb2b 533 * dependent on output configuration
8e42bf03
HV		 534 */
535 if (mdev->n_output > 0) {
536 mutex_unlock(&mdev->mutex);
537 return -EBUSY;
538 }
539
540 ret = v4l2_subdev_call(to_outsd(mdev), video, s_dv_timings, timings);
541
542 mutex_unlock(&mdev->mutex);
543
544 mxr_layer_update_output(layer);
545
546 /* any failure should return EINVAL according to V4L2 doc */
547 return ret ? -EINVAL : 0;
548}
549
550static int mxr_g_dv_timings(struct file *file, void *fh,
551 struct v4l2_dv_timings *timings)
552{
553 struct mxr_layer *layer = video_drvdata(file);
554 struct mxr_device *mdev = layer->mdev;
555 int ret;
556
557 /* lock protects from changing sd_out */
558 mutex_lock(&mdev->mutex);
559 ret = v4l2_subdev_call(to_outsd(mdev), video, g_dv_timings, timings);
560 mutex_unlock(&mdev->mutex);
561
562 return ret ? -EINVAL : 0;
563}
564
565static int mxr_dv_timings_cap(struct file *file, void *fh,
566 struct v4l2_dv_timings_cap *cap)
567{
568 struct mxr_layer *layer = video_drvdata(file);
569 struct mxr_device *mdev = layer->mdev;
570 int ret;
571
78dc47bb
LP		 572 cap->pad = 0;
573
8e42bf03
HV		 574 /* lock protects from changing sd_out */
575 mutex_lock(&mdev->mutex);
78dc47bb 576 ret = v4l2_subdev_call(to_outsd(mdev), pad, dv_timings_cap, cap);
8e42bf03
HV		 577 mutex_unlock(&mdev->mutex);
578
579 return ret ? -EINVAL : 0;
580}
581
314527ac 582static int mxr_s_std(struct file *file, void *fh, v4l2_std_id norm)
fef1c8d0
TS		 583{
584 struct mxr_layer *layer = video_drvdata(file);
585 struct mxr_device *mdev = layer->mdev;
586 int ret;
587
588 /* lock protects from changing sd_out */
589 mutex_lock(&mdev->mutex);
590
591 /* standard change cannot be done while there is an entity
39c1cb2b 592 * dependent on output configuration
fef1c8d0
TS		 593 */
594 if (mdev->n_output > 0) {
595 mutex_unlock(&mdev->mutex);
596 return -EBUSY;
597 }
598
314527ac 599 ret = v4l2_subdev_call(to_outsd(mdev), video, s_std_output, norm);
fef1c8d0
TS		 600
601 mutex_unlock(&mdev->mutex);
602
0d066d3f
TS		 603 mxr_layer_update_output(layer);
604
fef1c8d0
TS		 605 return ret ? -EINVAL : 0;
606}
607
608static int mxr_g_std(struct file *file, void *fh, v4l2_std_id *norm)
609{
610 struct mxr_layer *layer = video_drvdata(file);
611 struct mxr_device *mdev = layer->mdev;
612 int ret;
613
614 /* lock protects from changing sd_out */
615 mutex_lock(&mdev->mutex);
616 ret = v4l2_subdev_call(to_outsd(mdev), video, g_std_output, norm);
617 mutex_unlock(&mdev->mutex);
618
619 return ret ? -EINVAL : 0;
620}
621
622static int mxr_enum_output(struct file *file, void *fh, struct v4l2_output *a)
623{
624 struct mxr_layer *layer = video_drvdata(file);
625 struct mxr_device *mdev = layer->mdev;
626 struct mxr_output *out;
627 struct v4l2_subdev *sd;
628
629 if (a->index >= mdev->output_cnt)
630 return -EINVAL;
631 out = mdev->output[a->index];
632 BUG_ON(out == NULL);
633 sd = out->sd;
634 strlcpy(a->name, out->name, sizeof(a->name));
635
636 /* try to obtain supported tv norms */
637 v4l2_subdev_call(sd, video, g_tvnorms_output, &a->std);
638 a->capabilities = 0;
8e42bf03
HV		 639 if (sd->ops->video && sd->ops->video->s_dv_timings)
640 a->capabilities |= V4L2_OUT_CAP_DV_TIMINGS;
fef1c8d0
TS		 641 if (sd->ops->video && sd->ops->video->s_std_output)
642 a->capabilities |= V4L2_OUT_CAP_STD;
643 a->type = V4L2_OUTPUT_TYPE_ANALOG;
644
645 return 0;
646}
647
648static int mxr_s_output(struct file *file, void *fh, unsigned int i)
649{
650 struct video_device *vfd = video_devdata(file);
651 struct mxr_layer *layer = video_drvdata(file);
652 struct mxr_device *mdev = layer->mdev;
fef1c8d0
TS		 653
654 if (i >= mdev->output_cnt || mdev->output[i] == NULL)
655 return -EINVAL;
656
657 mutex_lock(&mdev->mutex);
658 if (mdev->n_output > 0) {
0d066d3f
TS		 659 mutex_unlock(&mdev->mutex);
660 return -EBUSY;
fef1c8d0
TS		 661 }
662 mdev->current_output = i;
663 vfd->tvnorms = 0;
664 v4l2_subdev_call(to_outsd(mdev), video, g_tvnorms_output,
665 &vfd->tvnorms);
0d066d3f
TS		 666 mutex_unlock(&mdev->mutex);
667
668 /* update layers geometry */
669 mxr_layer_update_output(layer);
670
fef1c8d0
TS		 671 mxr_dbg(mdev, "tvnorms = %08llx\n", vfd->tvnorms);
672
0d066d3f 673 return 0;
fef1c8d0
TS		 674}
675
676static int mxr_g_output(struct file *file, void *fh, unsigned int *p)
677{
678 struct mxr_layer *layer = video_drvdata(file);
679 struct mxr_device *mdev = layer->mdev;
680
681 mutex_lock(&mdev->mutex);
682 *p = mdev->current_output;
683 mutex_unlock(&mdev->mutex);
684
685 return 0;
686}
687
688static int mxr_reqbufs(struct file *file, void *priv,
689 struct v4l2_requestbuffers *p)
690{
691 struct mxr_layer *layer = video_drvdata(file);
692
693 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
694 return vb2_reqbufs(&layer->vb_queue, p);
695}
696
697static int mxr_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
698{
699 struct mxr_layer *layer = video_drvdata(file);
700
701 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
702 return vb2_querybuf(&layer->vb_queue, p);
703}
704
705static int mxr_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
706{
707 struct mxr_layer *layer = video_drvdata(file);
708
709 mxr_dbg(layer->mdev, "%s:%d(%d)\n", __func__, __LINE__, p->index);
710 return vb2_qbuf(&layer->vb_queue, p);
711}
712
713static int mxr_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
714{
715 struct mxr_layer *layer = video_drvdata(file);
716
717 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
718 return vb2_dqbuf(&layer->vb_queue, p, file->f_flags & O_NONBLOCK);
719}
720
3c44efd3
TS		 721static int mxr_expbuf(struct file *file, void *priv,
722 struct v4l2_exportbuffer *eb)
723{
724 struct mxr_layer *layer = video_drvdata(file);
725
726 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
727 return vb2_expbuf(&layer->vb_queue, eb);
728}
729
fef1c8d0
TS		 730static int mxr_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
731{
732 struct mxr_layer *layer = video_drvdata(file);
733
734 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
735 return vb2_streamon(&layer->vb_queue, i);
736}
737
738static int mxr_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
739{
740 struct mxr_layer *layer = video_drvdata(file);
741
742 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
743 return vb2_streamoff(&layer->vb_queue, i);
744}
745
746static const struct v4l2_ioctl_ops mxr_ioctl_ops = {
747 .vidioc_querycap = mxr_querycap,
748 /* format handling */
7208507e 749 .vidioc_enum_fmt_vid_out_mplane = mxr_enum_fmt,
fef1c8d0
TS		 750 .vidioc_s_fmt_vid_out_mplane = mxr_s_fmt,
751 .vidioc_g_fmt_vid_out_mplane = mxr_g_fmt,
752 /* buffer control */
753 .vidioc_reqbufs = mxr_reqbufs,
754 .vidioc_querybuf = mxr_querybuf,
755 .vidioc_qbuf = mxr_qbuf,
756 .vidioc_dqbuf = mxr_dqbuf,
3c44efd3 757 .vidioc_expbuf = mxr_expbuf,
fef1c8d0
TS		 758 /* Streaming control */
759 .vidioc_streamon = mxr_streamon,
760 .vidioc_streamoff = mxr_streamoff,
8e42bf03
HV		 761 /* DV Timings functions */
762 .vidioc_enum_dv_timings = mxr_enum_dv_timings,
763 .vidioc_s_dv_timings = mxr_s_dv_timings,
764 .vidioc_g_dv_timings = mxr_g_dv_timings,
765 .vidioc_dv_timings_cap = mxr_dv_timings_cap,
fef1c8d0
TS		 766 /* analog TV standard functions */
767 .vidioc_s_std = mxr_s_std,
768 .vidioc_g_std = mxr_g_std,
769 /* Output handling */
770 .vidioc_enum_output = mxr_enum_output,
771 .vidioc_s_output = mxr_s_output,
772 .vidioc_g_output = mxr_g_output,
0d066d3f
TS		 773 /* selection ioctls */
774 .vidioc_g_selection = mxr_g_selection,
775 .vidioc_s_selection = mxr_s_selection,
fef1c8d0
TS		 776};
777
778static int mxr_video_open(struct file *file)
779{
780 struct mxr_layer *layer = video_drvdata(file);
781 struct mxr_device *mdev = layer->mdev;
782 int ret = 0;
783
784 mxr_dbg(mdev, "%s:%d\n", __func__, __LINE__);
00ccdc3c
HV		 785 if (mutex_lock_interruptible(&layer->mutex))
786 return -ERESTARTSYS;
fef1c8d0
TS		 787 /* assure device probe is finished */
788 wait_for_device_probe();
789 /* creating context for file descriptor */
790 ret = v4l2_fh_open(file);
791 if (ret) {
792 mxr_err(mdev, "v4l2_fh_open failed\n");
00ccdc3c 793 goto unlock;
fef1c8d0
TS		 794 }
795
796 /* leaving if layer is already initialized */
797 if (!v4l2_fh_is_singular_file(file))
00ccdc3c 798 goto unlock;
fef1c8d0
TS		 799
800 /* FIXME: should power be enabled on open? */
801 ret = mxr_power_get(mdev);
802 if (ret) {
803 mxr_err(mdev, "power on failed\n");
804 goto fail_fh_open;
805 }
806
807 ret = vb2_queue_init(&layer->vb_queue);
808 if (ret != 0) {
809 mxr_err(mdev, "failed to initialize vb2 queue\n");
810 goto fail_power;
811 }
812 /* set default format, first on the list */
813 layer->fmt = layer->fmt_array[0];
814 /* setup default geometry */
815 mxr_layer_default_geo(layer);
00ccdc3c 816 mutex_unlock(&layer->mutex);
fef1c8d0
TS		 817
818 return 0;
819
820fail_power:
821 mxr_power_put(mdev);
822
823fail_fh_open:
824 v4l2_fh_release(file);
825
00ccdc3c
HV		 826unlock:
827 mutex_unlock(&layer->mutex);
828
fef1c8d0
TS		 829 return ret;
830}
831
832static unsigned int
833mxr_video_poll(struct file *file, struct poll_table_struct *wait)
834{
835 struct mxr_layer *layer = video_drvdata(file);
00ccdc3c 836 unsigned int res;
fef1c8d0
TS		 837
838 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
839
00ccdc3c
HV		 840 mutex_lock(&layer->mutex);
841 res = vb2_poll(&layer->vb_queue, file, wait);
842 mutex_unlock(&layer->mutex);
843 return res;
fef1c8d0
TS		 844}
845
846static int mxr_video_mmap(struct file *file, struct vm_area_struct *vma)
847{
848 struct mxr_layer *layer = video_drvdata(file);
00ccdc3c 849 int ret;
fef1c8d0
TS		 850
851 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
852
00ccdc3c
HV		 853 if (mutex_lock_interruptible(&layer->mutex))
854 return -ERESTARTSYS;
855 ret = vb2_mmap(&layer->vb_queue, vma);
856 mutex_unlock(&layer->mutex);
857 return ret;
fef1c8d0
TS		 858}
859
860static int mxr_video_release(struct file *file)
861{
862 struct mxr_layer *layer = video_drvdata(file);
863
864 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
00ccdc3c 865 mutex_lock(&layer->mutex);
fef1c8d0
TS		 866 if (v4l2_fh_is_singular_file(file)) {
867 vb2_queue_release(&layer->vb_queue);
868 mxr_power_put(layer->mdev);
869 }
870 v4l2_fh_release(file);
00ccdc3c 871 mutex_unlock(&layer->mutex);
fef1c8d0
TS		 872 return 0;
873}
874
875static const struct v4l2_file_operations mxr_fops = {
876 .owner = THIS_MODULE,
877 .open = mxr_video_open,
878 .poll = mxr_video_poll,
879 .mmap = mxr_video_mmap,
880 .release = mxr_video_release,
881 .unlocked_ioctl = video_ioctl2,
882};
883
df9ecb0c 884static int queue_setup(struct vb2_queue *vq,
fc714e70 885 unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[],
fef1c8d0
TS		 886 void *alloc_ctxs[])
887{
888 struct mxr_layer *layer = vb2_get_drv_priv(vq);
889 const struct mxr_format *fmt = layer->fmt;
890 int i;
891 struct mxr_device *mdev = layer->mdev;
892 struct v4l2_plane_pix_format planes[3];
893
894 mxr_dbg(mdev, "%s\n", __func__);
895 /* checking if format was configured */
896 if (fmt == NULL)
897 return -EINVAL;
898 mxr_dbg(mdev, "fmt = %s\n", fmt->name);
899 mxr_mplane_fill(planes, fmt, layer->geo.src.full_width,
900 layer->geo.src.full_height);
901
902 *nplanes = fmt->num_subframes;
903 for (i = 0; i < fmt->num_subframes; ++i) {
904 alloc_ctxs[i] = layer->mdev->alloc_ctx;
c1bf9c65 905 sizes[i] = planes[i].sizeimage;
c31e3c4b 906 mxr_dbg(mdev, "size[%d] = %08x\n", i, sizes[i]);
fef1c8d0
TS		 907 }
908
909 if (*nbuffers == 0)
910 *nbuffers = 1;
911
912 return 0;
913}
914
915static void buf_queue(struct vb2_buffer *vb)
916{
2d700715
JS		 917 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
918 struct mxr_buffer *buffer = container_of(vbuf, struct mxr_buffer, vb);
fef1c8d0
TS		 919 struct mxr_layer *layer = vb2_get_drv_priv(vb->vb2_queue);
920 struct mxr_device *mdev = layer->mdev;
921 unsigned long flags;
fef1c8d0
TS		 922
923 spin_lock_irqsave(&layer->enq_slock, flags);
fef1c8d0
TS		 924 list_add_tail(&buffer->list, &layer->enq_list);
925 spin_unlock_irqrestore(&layer->enq_slock, flags);
fef1c8d0
TS		 926
927 mxr_dbg(mdev, "queuing buffer\n");
928}
929
bd323e28 930static int start_streaming(struct vb2_queue *vq, unsigned int count)
fef1c8d0
TS		 931{
932 struct mxr_layer *layer = vb2_get_drv_priv(vq);
933 struct mxr_device *mdev = layer->mdev;
934 unsigned long flags;
935
936 mxr_dbg(mdev, "%s\n", __func__);
bd323e28 937
fef1c8d0
TS		 938 /* block any changes in output configuration */
939 mxr_output_get(mdev);
940
0d066d3f 941 mxr_layer_update_output(layer);
fef1c8d0
TS		 942 layer->ops.format_set(layer);
943 /* enabling layer in hardware */
944 spin_lock_irqsave(&layer->enq_slock, flags);
bd323e28 945 layer->state = MXR_LAYER_STREAMING;
fef1c8d0
TS		 946 spin_unlock_irqrestore(&layer->enq_slock, flags);
947
bd323e28
MS		 948 layer->ops.stream_set(layer, MXR_ENABLE);
949 mxr_streamer_get(mdev);
950
fef1c8d0
TS		 951 return 0;
952}
953
954static void mxr_watchdog(unsigned long arg)
955{
956 struct mxr_layer *layer = (struct mxr_layer *) arg;
957 struct mxr_device *mdev = layer->mdev;
958 unsigned long flags;
959
960 mxr_err(mdev, "watchdog fired for layer %s\n", layer->vfd.name);
961
962 spin_lock_irqsave(&layer->enq_slock, flags);
963
964 if (layer->update_buf == layer->shadow_buf)
965 layer->update_buf = NULL;
966 if (layer->update_buf) {
2d700715
JS		 967 vb2_buffer_done(&layer->update_buf->vb.vb2_buf,
968 VB2_BUF_STATE_ERROR);
fef1c8d0
TS		 969 layer->update_buf = NULL;
970 }
971 if (layer->shadow_buf) {
2d700715
JS		 972 vb2_buffer_done(&layer->shadow_buf->vb.vb2_buf,
973 VB2_BUF_STATE_ERROR);
fef1c8d0
TS		 974 layer->shadow_buf = NULL;
975 }
976 spin_unlock_irqrestore(&layer->enq_slock, flags);
977}
978
e37559b2 979static void stop_streaming(struct vb2_queue *vq)
fef1c8d0
TS		 980{
981 struct mxr_layer *layer = vb2_get_drv_priv(vq);
982 struct mxr_device *mdev = layer->mdev;
983 unsigned long flags;
984 struct timer_list watchdog;
985 struct mxr_buffer *buf, *buf_tmp;
986
987 mxr_dbg(mdev, "%s\n", __func__);
988
989 spin_lock_irqsave(&layer->enq_slock, flags);
990
991 /* reset list */
992 layer->state = MXR_LAYER_STREAMING_FINISH;
993
994 /* set all buffer to be done */
995 list_for_each_entry_safe(buf, buf_tmp, &layer->enq_list, list) {
996 list_del(&buf->list);
2d700715 997 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
fef1c8d0
TS		 998 }
999
1000 spin_unlock_irqrestore(&layer->enq_slock, flags);
1001
1002 /* give 1 seconds to complete to complete last buffers */
1003 setup_timer_on_stack(&watchdog, mxr_watchdog,
1004 (unsigned long)layer);
1005 mod_timer(&watchdog, jiffies + msecs_to_jiffies(1000));
1006
1007 /* wait until all buffers are goes to done state */
1008 vb2_wait_for_all_buffers(vq);
1009
1010 /* stop timer if all synchronization is done */
1011 del_timer_sync(&watchdog);
1012 destroy_timer_on_stack(&watchdog);
1013
1014 /* stopping hardware */
1015 spin_lock_irqsave(&layer->enq_slock, flags);
1016 layer->state = MXR_LAYER_IDLE;
1017 spin_unlock_irqrestore(&layer->enq_slock, flags);
1018
1019 /* disabling layer in hardware */
1020 layer->ops.stream_set(layer, MXR_DISABLE);
1021 /* remove one streamer */
1022 mxr_streamer_put(mdev);
1023 /* allow changes in output configuration */
1024 mxr_output_put(mdev);
fef1c8d0
TS		 1025}
1026
1027static struct vb2_ops mxr_video_qops = {
1028 .queue_setup = queue_setup,
1029 .buf_queue = buf_queue,
c747404d
PL		 1030 .wait_prepare = vb2_ops_wait_prepare,
1031 .wait_finish = vb2_ops_wait_finish,
fef1c8d0
TS		 1032 .start_streaming = start_streaming,
1033 .stop_streaming = stop_streaming,
1034};
1035
1036/* FIXME: try to put this functions to mxr_base_layer_create */
1037int mxr_base_layer_register(struct mxr_layer *layer)
1038{
1039 struct mxr_device *mdev = layer->mdev;
1040 int ret;
1041
1042 ret = video_register_device(&layer->vfd, VFL_TYPE_GRABBER, -1);
1043 if (ret)
1044 mxr_err(mdev, "failed to register video device\n");
1045 else
1046 mxr_info(mdev, "registered layer %s as /dev/video%d\n",
1047 layer->vfd.name, layer->vfd.num);
1048 return ret;
1049}
1050
1051void mxr_base_layer_unregister(struct mxr_layer *layer)
1052{
1053 video_unregister_device(&layer->vfd);
1054}
1055
1056void mxr_layer_release(struct mxr_layer *layer)
1057{
1058 if (layer->ops.release)
1059 layer->ops.release(layer);
1060}
1061
1062void mxr_base_layer_release(struct mxr_layer *layer)
1063{
1064 kfree(layer);
1065}
1066
1067static void mxr_vfd_release(struct video_device *vdev)
1068{
f5c99037 1069 pr_info("video device release\n");
fef1c8d0
TS		 1070}
1071
1072struct mxr_layer *mxr_base_layer_create(struct mxr_device *mdev,
adbedc29 1073 int idx, char *name, const struct mxr_layer_ops *ops)
fef1c8d0
TS		 1074{
1075 struct mxr_layer *layer;
1076
c0d51204 1077 layer = kzalloc(sizeof(*layer), GFP_KERNEL);
fef1c8d0
TS		 1078 if (layer == NULL) {
1079 mxr_err(mdev, "not enough memory for layer.\n");
1080 goto fail;
1081 }
1082
1083 layer->mdev = mdev;
1084 layer->idx = idx;
1085 layer->ops = *ops;
1086
1087 spin_lock_init(&layer->enq_slock);
1088 INIT_LIST_HEAD(&layer->enq_list);
1089 mutex_init(&layer->mutex);
1090
1091 layer->vfd = (struct video_device) {
1092 .minor = -1,
1093 .release = mxr_vfd_release,
1094 .fops = &mxr_fops,
954f340f 1095 .vfl_dir = VFL_DIR_TX,
fef1c8d0
TS		 1096 .ioctl_ops = &mxr_ioctl_ops,
1097 };
1098 strlcpy(layer->vfd.name, name, sizeof(layer->vfd.name));
fef1c8d0
TS		 1099
1100 video_set_drvdata(&layer->vfd, layer);
1101 layer->vfd.lock = &layer->mutex;
1102 layer->vfd.v4l2_dev = &mdev->v4l2_dev;
1103
1104 layer->vb_queue = (struct vb2_queue) {
1105 .type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
fa77521f 1106 .io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF,
fef1c8d0
TS		 1107 .drv_priv = layer,
1108 .buf_struct_size = sizeof(struct mxr_buffer),
1109 .ops = &mxr_video_qops,
b3379c62 1110 .min_buffers_needed = 1,
fef1c8d0 1111 .mem_ops = &vb2_dma_contig_memops,
c747404d 1112 .lock = &layer->mutex,
fef1c8d0
TS		 1113 };
1114
1115 return layer;
1116
1117fail:
1118 return NULL;
1119}
1120
1121static const struct mxr_format *find_format_by_fourcc(
1122 struct mxr_layer *layer, unsigned long fourcc)
1123{
1124 int i;
1125
1126 for (i = 0; i < layer->fmt_array_size; ++i)
1127 if (layer->fmt_array[i]->fourcc == fourcc)
1128 return layer->fmt_array[i];
1129 return NULL;
1130}
1131
1132static const struct mxr_format *find_format_by_index(
1133 struct mxr_layer *layer, unsigned long index)
1134{
1135 if (index >= layer->fmt_array_size)
1136 return NULL;
1137 return layer->fmt_array[index];
1138}
1139
Linux kernel - Deliverables
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