1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * V4L2 Capture IC Preprocess Subdev for Freescale i.MX5/6 SOC
4 *
5 * This subdevice handles capture of video frames from the CSI or VDIC,
6 * which are routed directly to the Image Converter preprocess tasks,
7 * for resizing, colorspace conversion, and rotation.
8 *
9 * Copyright (c) 2012-2017 Mentor Graphics Inc.
10 */
11 #include <linux/delay.h>
12 #include <linux/interrupt.h>
13 #include <linux/module.h>
14 #include <linux/sched.h>
15 #include <linux/slab.h>
16 #include <linux/spinlock.h>
17 #include <linux/timer.h>
18 #include <media/v4l2-ctrls.h>
19 #include <media/v4l2-device.h>
20 #include <media/v4l2-ioctl.h>
21 #include <media/v4l2-subdev.h>
22 #include <media/imx.h>
23 #include "imx-media.h"
24 #include "imx-ic.h"
25
26 /*
27 * Min/Max supported width and heights.
28 */
29 #define MIN_W 32
30 #define MIN_H 32
31 #define MAX_W 4096
32 #define MAX_H 4096
33 #define W_ALIGN 4 /* multiple of 16 pixels */
34 #define H_ALIGN 1 /* multiple of 2 lines */
35 #define S_ALIGN 1 /* multiple of 2 */
36
37 struct prp_priv {
38 struct imx_ic_priv *ic_priv;
39 struct media_pad pad[PRP_NUM_PADS];
40
41 /* lock to protect all members below */
42 struct mutex lock;
43
44 struct v4l2_subdev *src_sd;
45 struct v4l2_subdev *sink_sd_prpenc;
46 struct v4l2_subdev *sink_sd_prpvf;
47
48 /* the CSI id at link validate */
49 int csi_id;
50
51 struct v4l2_mbus_framefmt format_mbus;
52 struct v4l2_fract frame_interval;
53
54 int stream_count;
55 };
56
sd_to_priv(struct v4l2_subdev * sd)57 static inline struct prp_priv *sd_to_priv(struct v4l2_subdev *sd)
58 {
59 struct imx_ic_priv *ic_priv = v4l2_get_subdevdata(sd);
60
61 return ic_priv->task_priv;
62 }
63
prp_start(struct prp_priv * priv)64 static int prp_start(struct prp_priv *priv)
65 {
66 struct imx_ic_priv *ic_priv = priv->ic_priv;
67 bool src_is_vdic;
68
69 /* set IC to receive from CSI or VDI depending on source */
70 src_is_vdic = !!(priv->src_sd->grp_id & IMX_MEDIA_GRP_ID_IPU_VDIC);
71
72 ipu_set_ic_src_mux(ic_priv->ipu, priv->csi_id, src_is_vdic);
73
74 return 0;
75 }
76
prp_stop(struct prp_priv * priv)77 static void prp_stop(struct prp_priv *priv)
78 {
79 }
80
81 static struct v4l2_mbus_framefmt *
__prp_get_fmt(struct prp_priv * priv,struct v4l2_subdev_pad_config * cfg,unsigned int pad,enum v4l2_subdev_format_whence which)82 __prp_get_fmt(struct prp_priv *priv, struct v4l2_subdev_pad_config *cfg,
83 unsigned int pad, enum v4l2_subdev_format_whence which)
84 {
85 struct imx_ic_priv *ic_priv = priv->ic_priv;
86
87 if (which == V4L2_SUBDEV_FORMAT_TRY)
88 return v4l2_subdev_get_try_format(&ic_priv->sd, cfg, pad);
89 else
90 return &priv->format_mbus;
91 }
92
93 /*
94 * V4L2 subdev operations.
95 */
96
prp_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_mbus_code_enum * code)97 static int prp_enum_mbus_code(struct v4l2_subdev *sd,
98 struct v4l2_subdev_pad_config *cfg,
99 struct v4l2_subdev_mbus_code_enum *code)
100 {
101 struct prp_priv *priv = sd_to_priv(sd);
102 struct v4l2_mbus_framefmt *infmt;
103 int ret = 0;
104
105 mutex_lock(&priv->lock);
106
107 switch (code->pad) {
108 case PRP_SINK_PAD:
109 ret = imx_media_enum_ipu_formats(&code->code, code->index,
110 PIXFMT_SEL_YUV_RGB);
111 break;
112 case PRP_SRC_PAD_PRPENC:
113 case PRP_SRC_PAD_PRPVF:
114 if (code->index != 0) {
115 ret = -EINVAL;
116 goto out;
117 }
118 infmt = __prp_get_fmt(priv, cfg, PRP_SINK_PAD, code->which);
119 code->code = infmt->code;
120 break;
121 default:
122 ret = -EINVAL;
123 }
124 out:
125 mutex_unlock(&priv->lock);
126 return ret;
127 }
128
prp_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * sdformat)129 static int prp_get_fmt(struct v4l2_subdev *sd,
130 struct v4l2_subdev_pad_config *cfg,
131 struct v4l2_subdev_format *sdformat)
132 {
133 struct prp_priv *priv = sd_to_priv(sd);
134 struct v4l2_mbus_framefmt *fmt;
135 int ret = 0;
136
137 if (sdformat->pad >= PRP_NUM_PADS)
138 return -EINVAL;
139
140 mutex_lock(&priv->lock);
141
142 fmt = __prp_get_fmt(priv, cfg, sdformat->pad, sdformat->which);
143 if (!fmt) {
144 ret = -EINVAL;
145 goto out;
146 }
147
148 sdformat->format = *fmt;
149 out:
150 mutex_unlock(&priv->lock);
151 return ret;
152 }
153
prp_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * sdformat)154 static int prp_set_fmt(struct v4l2_subdev *sd,
155 struct v4l2_subdev_pad_config *cfg,
156 struct v4l2_subdev_format *sdformat)
157 {
158 struct prp_priv *priv = sd_to_priv(sd);
159 struct v4l2_mbus_framefmt *fmt, *infmt;
160 const struct imx_media_pixfmt *cc;
161 int ret = 0;
162 u32 code;
163
164 if (sdformat->pad >= PRP_NUM_PADS)
165 return -EINVAL;
166
167 mutex_lock(&priv->lock);
168
169 if (priv->stream_count > 0) {
170 ret = -EBUSY;
171 goto out;
172 }
173
174 infmt = __prp_get_fmt(priv, cfg, PRP_SINK_PAD, sdformat->which);
175
176 switch (sdformat->pad) {
177 case PRP_SINK_PAD:
178 v4l_bound_align_image(&sdformat->format.width, MIN_W, MAX_W,
179 W_ALIGN, &sdformat->format.height,
180 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
181
182 cc = imx_media_find_ipu_format(sdformat->format.code,
183 PIXFMT_SEL_YUV_RGB);
184 if (!cc) {
185 imx_media_enum_ipu_formats(&code, 0,
186 PIXFMT_SEL_YUV_RGB);
187 cc = imx_media_find_ipu_format(code,
188 PIXFMT_SEL_YUV_RGB);
189 sdformat->format.code = cc->codes[0];
190 }
191
192 if (sdformat->format.field == V4L2_FIELD_ANY)
193 sdformat->format.field = V4L2_FIELD_NONE;
194 break;
195 case PRP_SRC_PAD_PRPENC:
196 case PRP_SRC_PAD_PRPVF:
197 /* Output pads mirror input pad */
198 sdformat->format = *infmt;
199 break;
200 }
201
202 imx_media_try_colorimetry(&sdformat->format, true);
203
204 fmt = __prp_get_fmt(priv, cfg, sdformat->pad, sdformat->which);
205 *fmt = sdformat->format;
206 out:
207 mutex_unlock(&priv->lock);
208 return ret;
209 }
210
prp_link_setup(struct media_entity * entity,const struct media_pad * local,const struct media_pad * remote,u32 flags)211 static int prp_link_setup(struct media_entity *entity,
212 const struct media_pad *local,
213 const struct media_pad *remote, u32 flags)
214 {
215 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
216 struct imx_ic_priv *ic_priv = v4l2_get_subdevdata(sd);
217 struct prp_priv *priv = ic_priv->task_priv;
218 struct v4l2_subdev *remote_sd;
219 int ret = 0;
220
221 dev_dbg(ic_priv->ipu_dev, "%s: link setup %s -> %s",
222 ic_priv->sd.name, remote->entity->name, local->entity->name);
223
224 remote_sd = media_entity_to_v4l2_subdev(remote->entity);
225
226 mutex_lock(&priv->lock);
227
228 if (local->flags & MEDIA_PAD_FL_SINK) {
229 if (flags & MEDIA_LNK_FL_ENABLED) {
230 if (priv->src_sd) {
231 ret = -EBUSY;
232 goto out;
233 }
234 if (priv->sink_sd_prpenc &&
235 (remote_sd->grp_id & IMX_MEDIA_GRP_ID_IPU_VDIC)) {
236 ret = -EINVAL;
237 goto out;
238 }
239 priv->src_sd = remote_sd;
240 } else {
241 priv->src_sd = NULL;
242 }
243
244 goto out;
245 }
246
247 /* this is a source pad */
248 if (flags & MEDIA_LNK_FL_ENABLED) {
249 switch (local->index) {
250 case PRP_SRC_PAD_PRPENC:
251 if (priv->sink_sd_prpenc) {
252 ret = -EBUSY;
253 goto out;
254 }
255 if (priv->src_sd && (priv->src_sd->grp_id &
256 IMX_MEDIA_GRP_ID_IPU_VDIC)) {
257 ret = -EINVAL;
258 goto out;
259 }
260 priv->sink_sd_prpenc = remote_sd;
261 break;
262 case PRP_SRC_PAD_PRPVF:
263 if (priv->sink_sd_prpvf) {
264 ret = -EBUSY;
265 goto out;
266 }
267 priv->sink_sd_prpvf = remote_sd;
268 break;
269 default:
270 ret = -EINVAL;
271 }
272 } else {
273 switch (local->index) {
274 case PRP_SRC_PAD_PRPENC:
275 priv->sink_sd_prpenc = NULL;
276 break;
277 case PRP_SRC_PAD_PRPVF:
278 priv->sink_sd_prpvf = NULL;
279 break;
280 default:
281 ret = -EINVAL;
282 }
283 }
284
285 out:
286 mutex_unlock(&priv->lock);
287 return ret;
288 }
289
prp_link_validate(struct v4l2_subdev * sd,struct media_link * link,struct v4l2_subdev_format * source_fmt,struct v4l2_subdev_format * sink_fmt)290 static int prp_link_validate(struct v4l2_subdev *sd,
291 struct media_link *link,
292 struct v4l2_subdev_format *source_fmt,
293 struct v4l2_subdev_format *sink_fmt)
294 {
295 struct imx_ic_priv *ic_priv = v4l2_get_subdevdata(sd);
296 struct prp_priv *priv = ic_priv->task_priv;
297 struct v4l2_subdev *csi;
298 int ret;
299
300 ret = v4l2_subdev_link_validate_default(sd, link,
301 source_fmt, sink_fmt);
302 if (ret)
303 return ret;
304
305 csi = imx_media_pipeline_subdev(&ic_priv->sd.entity,
306 IMX_MEDIA_GRP_ID_IPU_CSI, true);
307 if (IS_ERR(csi))
308 csi = NULL;
309
310 mutex_lock(&priv->lock);
311
312 if (priv->src_sd->grp_id & IMX_MEDIA_GRP_ID_IPU_VDIC) {
313 /*
314 * the ->PRPENC link cannot be enabled if the source
315 * is the VDIC
316 */
317 if (priv->sink_sd_prpenc) {
318 ret = -EINVAL;
319 goto out;
320 }
321 } else {
322 /* the source is a CSI */
323 if (!csi) {
324 ret = -EINVAL;
325 goto out;
326 }
327 }
328
329 if (csi) {
330 switch (csi->grp_id) {
331 case IMX_MEDIA_GRP_ID_IPU_CSI0:
332 priv->csi_id = 0;
333 break;
334 case IMX_MEDIA_GRP_ID_IPU_CSI1:
335 priv->csi_id = 1;
336 break;
337 default:
338 ret = -EINVAL;
339 }
340 } else {
341 priv->csi_id = 0;
342 }
343
344 out:
345 mutex_unlock(&priv->lock);
346 return ret;
347 }
348
prp_s_stream(struct v4l2_subdev * sd,int enable)349 static int prp_s_stream(struct v4l2_subdev *sd, int enable)
350 {
351 struct imx_ic_priv *ic_priv = v4l2_get_subdevdata(sd);
352 struct prp_priv *priv = ic_priv->task_priv;
353 int ret = 0;
354
355 mutex_lock(&priv->lock);
356
357 if (!priv->src_sd || (!priv->sink_sd_prpenc && !priv->sink_sd_prpvf)) {
358 ret = -EPIPE;
359 goto out;
360 }
361
362 /*
363 * enable/disable streaming only if stream_count is
364 * going from 0 to 1 / 1 to 0.
365 */
366 if (priv->stream_count != !enable)
367 goto update_count;
368
369 dev_dbg(ic_priv->ipu_dev, "%s: stream %s\n", sd->name,
370 enable ? "ON" : "OFF");
371
372 if (enable)
373 ret = prp_start(priv);
374 else
375 prp_stop(priv);
376 if (ret)
377 goto out;
378
379 /* start/stop upstream */
380 ret = v4l2_subdev_call(priv->src_sd, video, s_stream, enable);
381 ret = (ret && ret != -ENOIOCTLCMD) ? ret : 0;
382 if (ret) {
383 if (enable)
384 prp_stop(priv);
385 goto out;
386 }
387
388 update_count:
389 priv->stream_count += enable ? 1 : -1;
390 if (priv->stream_count < 0)
391 priv->stream_count = 0;
392 out:
393 mutex_unlock(&priv->lock);
394 return ret;
395 }
396
prp_g_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * fi)397 static int prp_g_frame_interval(struct v4l2_subdev *sd,
398 struct v4l2_subdev_frame_interval *fi)
399 {
400 struct prp_priv *priv = sd_to_priv(sd);
401
402 if (fi->pad >= PRP_NUM_PADS)
403 return -EINVAL;
404
405 mutex_lock(&priv->lock);
406 fi->interval = priv->frame_interval;
407 mutex_unlock(&priv->lock);
408
409 return 0;
410 }
411
prp_s_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * fi)412 static int prp_s_frame_interval(struct v4l2_subdev *sd,
413 struct v4l2_subdev_frame_interval *fi)
414 {
415 struct prp_priv *priv = sd_to_priv(sd);
416
417 if (fi->pad >= PRP_NUM_PADS)
418 return -EINVAL;
419
420 mutex_lock(&priv->lock);
421
422 /* No limits on valid frame intervals */
423 if (fi->interval.numerator == 0 || fi->interval.denominator == 0)
424 fi->interval = priv->frame_interval;
425 else
426 priv->frame_interval = fi->interval;
427
428 mutex_unlock(&priv->lock);
429
430 return 0;
431 }
432
prp_registered(struct v4l2_subdev * sd)433 static int prp_registered(struct v4l2_subdev *sd)
434 {
435 struct prp_priv *priv = sd_to_priv(sd);
436 u32 code;
437
438 /* init default frame interval */
439 priv->frame_interval.numerator = 1;
440 priv->frame_interval.denominator = 30;
441
442 /* set a default mbus format */
443 imx_media_enum_ipu_formats(&code, 0, PIXFMT_SEL_YUV);
444
445 return imx_media_init_mbus_fmt(&priv->format_mbus,
446 IMX_MEDIA_DEF_PIX_WIDTH,
447 IMX_MEDIA_DEF_PIX_HEIGHT, code,
448 V4L2_FIELD_NONE, NULL);
449 }
450
451 static const struct v4l2_subdev_pad_ops prp_pad_ops = {
452 .init_cfg = imx_media_init_cfg,
453 .enum_mbus_code = prp_enum_mbus_code,
454 .get_fmt = prp_get_fmt,
455 .set_fmt = prp_set_fmt,
456 .link_validate = prp_link_validate,
457 };
458
459 static const struct v4l2_subdev_video_ops prp_video_ops = {
460 .g_frame_interval = prp_g_frame_interval,
461 .s_frame_interval = prp_s_frame_interval,
462 .s_stream = prp_s_stream,
463 };
464
465 static const struct media_entity_operations prp_entity_ops = {
466 .link_setup = prp_link_setup,
467 .link_validate = v4l2_subdev_link_validate,
468 };
469
470 static const struct v4l2_subdev_ops prp_subdev_ops = {
471 .video = &prp_video_ops,
472 .pad = &prp_pad_ops,
473 };
474
475 static const struct v4l2_subdev_internal_ops prp_internal_ops = {
476 .registered = prp_registered,
477 };
478
prp_init(struct imx_ic_priv * ic_priv)479 static int prp_init(struct imx_ic_priv *ic_priv)
480 {
481 struct prp_priv *priv;
482 int i;
483
484 priv = devm_kzalloc(ic_priv->ipu_dev, sizeof(*priv), GFP_KERNEL);
485 if (!priv)
486 return -ENOMEM;
487
488 mutex_init(&priv->lock);
489 ic_priv->task_priv = priv;
490 priv->ic_priv = ic_priv;
491
492 for (i = 0; i < PRP_NUM_PADS; i++)
493 priv->pad[i].flags = (i == PRP_SINK_PAD) ?
494 MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE;
495
496 return media_entity_pads_init(&ic_priv->sd.entity, PRP_NUM_PADS,
497 priv->pad);
498 }
499
prp_remove(struct imx_ic_priv * ic_priv)500 static void prp_remove(struct imx_ic_priv *ic_priv)
501 {
502 struct prp_priv *priv = ic_priv->task_priv;
503
504 mutex_destroy(&priv->lock);
505 }
506
507 struct imx_ic_ops imx_ic_prp_ops = {
508 .subdev_ops = &prp_subdev_ops,
509 .internal_ops = &prp_internal_ops,
510 .entity_ops = &prp_entity_ops,
511 .init = prp_init,
512 .remove = prp_remove,
513 };
514