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[media] media: imx: Add CSI subdev driver
[linux-2.6-block.git] / drivers / staging / media / imx / imx-media-csi.c
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4a34ec8e
SL		 1/*
2 * V4L2 Capture CSI Subdev for Freescale i.MX5/6 SOC
3 *
4 * Copyright (c) 2014-2017 Mentor Graphics Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11#include <linux/delay.h>
12#include <linux/interrupt.h>
13#include <linux/module.h>
14#include <linux/pinctrl/consumer.h>
15#include <linux/platform_device.h>
16#include <media/v4l2-ctrls.h>
17#include <media/v4l2-device.h>
18#include <media/v4l2-event.h>
19#include <media/v4l2-fwnode.h>
20#include <media/v4l2-mc.h>
21#include <media/v4l2-subdev.h>
22#include <media/videobuf2-dma-contig.h>
23#include <video/imx-ipu-v3.h>
24#include <media/imx.h>
25#include "imx-media.h"
26
27/*
28 * Min/Max supported width and heights.
29 *
30 * We allow planar output, so we have to align width by 16 pixels
31 * to meet IDMAC alignment requirements.
32 *
33 * TODO: move this into pad format negotiation, if capture device
34 * has not requested planar formats, we should allow 8 pixel
35 * alignment.
36 */
37#define MIN_W 176
38#define MIN_H 144
39#define MAX_W 4096
40#define MAX_H 4096
41#define W_ALIGN 4 /* multiple of 16 pixels */
42#define H_ALIGN 1 /* multiple of 2 lines */
43#define S_ALIGN 1 /* multiple of 2 */
44
45struct csi_priv {
46 struct device *dev;
47 struct ipu_soc *ipu;
48 struct imx_media_dev *md;
49 struct v4l2_subdev sd;
50 struct media_pad pad[CSI_NUM_PADS];
51 /* the video device at IDMAC output pad */
52 struct imx_media_video_dev *vdev;
53 struct imx_media_fim *fim;
54 int csi_id;
55 int smfc_id;
56
57 /* lock to protect all members below */
58 struct mutex lock;
59
60 int active_output_pad;
61
62 struct ipuv3_channel *idmac_ch;
63 struct ipu_smfc *smfc;
64 struct ipu_csi *csi;
65
66 struct v4l2_mbus_framefmt format_mbus[CSI_NUM_PADS];
67 const struct imx_media_pixfmt *cc[CSI_NUM_PADS];
68 struct v4l2_fract frame_interval;
69 struct v4l2_rect crop;
70
71 /* active vb2 buffers to send to video dev sink */
72 struct imx_media_buffer *active_vb2_buf[2];
73 struct imx_media_dma_buf underrun_buf;
74
75 int ipu_buf_num; /* ipu double buffer index: 0-1 */
76
77 /* the sink for the captured frames */
78 struct media_entity *sink;
79 enum ipu_csi_dest dest;
80 /* the source subdev */
81 struct v4l2_subdev *src_sd;
82
83 /* the mipi virtual channel number at link validate */
84 int vc_num;
85
86 /* the attached sensor at stream on */
87 struct imx_media_subdev *sensor;
88
89 spinlock_t irqlock; /* protect eof_irq handler */
90 struct timer_list eof_timeout_timer;
91 int eof_irq;
92 int nfb4eof_irq;
93
94 struct v4l2_ctrl_handler ctrl_hdlr;
95
96 int stream_count; /* streaming counter */
97 bool last_eof; /* waiting for last EOF at stream off */
98 bool nfb4eof; /* NFB4EOF encountered during streaming */
99 struct completion last_eof_comp;
100};
101
102static inline struct csi_priv *sd_to_dev(struct v4l2_subdev *sdev)
103{
104 return container_of(sdev, struct csi_priv, sd);
105}
106
107static void csi_idmac_put_ipu_resources(struct csi_priv *priv)
108{
109 if (!IS_ERR_OR_NULL(priv->idmac_ch))
110 ipu_idmac_put(priv->idmac_ch);
111 priv->idmac_ch = NULL;
112
113 if (!IS_ERR_OR_NULL(priv->smfc))
114 ipu_smfc_put(priv->smfc);
115 priv->smfc = NULL;
116}
117
118static int csi_idmac_get_ipu_resources(struct csi_priv *priv)
119{
120 int ch_num, ret;
121
122 ch_num = IPUV3_CHANNEL_CSI0 + priv->smfc_id;
123
124 priv->smfc = ipu_smfc_get(priv->ipu, ch_num);
125 if (IS_ERR(priv->smfc)) {
126 v4l2_err(&priv->sd, "failed to get SMFC\n");
127 ret = PTR_ERR(priv->smfc);
128 goto out;
129 }
130
131 priv->idmac_ch = ipu_idmac_get(priv->ipu, ch_num);
132 if (IS_ERR(priv->idmac_ch)) {
133 v4l2_err(&priv->sd, "could not get IDMAC channel %u\n",
134 ch_num);
135 ret = PTR_ERR(priv->idmac_ch);
136 goto out;
137 }
138
139 return 0;
140out:
141 csi_idmac_put_ipu_resources(priv);
142 return ret;
143}
144
145static void csi_vb2_buf_done(struct csi_priv *priv)
146{
147 struct imx_media_video_dev *vdev = priv->vdev;
148 struct imx_media_buffer *done, *next;
149 struct vb2_buffer *vb;
150 dma_addr_t phys;
151
152 done = priv->active_vb2_buf[priv->ipu_buf_num];
153 if (done) {
154 vb = &done->vbuf.vb2_buf;
155 vb->timestamp = ktime_get_ns();
156 vb2_buffer_done(vb, priv->nfb4eof ?
157 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
158 }
159
160 priv->nfb4eof = false;
161
162 /* get next queued buffer */
163 next = imx_media_capture_device_next_buf(vdev);
164 if (next) {
165 phys = vb2_dma_contig_plane_dma_addr(&next->vbuf.vb2_buf, 0);
166 priv->active_vb2_buf[priv->ipu_buf_num] = next;
167 } else {
168 phys = priv->underrun_buf.phys;
169 priv->active_vb2_buf[priv->ipu_buf_num] = NULL;
170 }
171
172 if (ipu_idmac_buffer_is_ready(priv->idmac_ch, priv->ipu_buf_num))
173 ipu_idmac_clear_buffer(priv->idmac_ch, priv->ipu_buf_num);
174
175 ipu_cpmem_set_buffer(priv->idmac_ch, priv->ipu_buf_num, phys);
176}
177
178static irqreturn_t csi_idmac_eof_interrupt(int irq, void *dev_id)
179{
180 struct csi_priv *priv = dev_id;
181
182 spin_lock(&priv->irqlock);
183
184 if (priv->last_eof) {
185 complete(&priv->last_eof_comp);
186 priv->last_eof = false;
187 goto unlock;
188 }
189
190 if (priv->fim) {
191 struct timespec cur_ts;
192
193 ktime_get_ts(&cur_ts);
194 /* call frame interval monitor */
195 imx_media_fim_eof_monitor(priv->fim, &cur_ts);
196 }
197
198 csi_vb2_buf_done(priv);
199
200 /* select new IPU buf */
201 ipu_idmac_select_buffer(priv->idmac_ch, priv->ipu_buf_num);
202 /* toggle IPU double-buffer index */
203 priv->ipu_buf_num ^= 1;
204
205 /* bump the EOF timeout timer */
206 mod_timer(&priv->eof_timeout_timer,
207 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT));
208
209unlock:
210 spin_unlock(&priv->irqlock);
211 return IRQ_HANDLED;
212}
213
214static irqreturn_t csi_idmac_nfb4eof_interrupt(int irq, void *dev_id)
215{
216 struct csi_priv *priv = dev_id;
217
218 spin_lock(&priv->irqlock);
219
220 /*
221 * this is not an unrecoverable error, just mark
222 * the next captured frame with vb2 error flag.
223 */
224 priv->nfb4eof = true;
225
226 v4l2_err(&priv->sd, "NFB4EOF\n");
227
228 spin_unlock(&priv->irqlock);
229
230 return IRQ_HANDLED;
231}
232
233/*
234 * EOF timeout timer function. This is an unrecoverable condition
235 * without a stream restart.
236 */
237static void csi_idmac_eof_timeout(unsigned long data)
238{
239 struct csi_priv *priv = (struct csi_priv *)data;
240 struct imx_media_video_dev *vdev = priv->vdev;
241
242 v4l2_err(&priv->sd, "EOF timeout\n");
243
244 /* signal a fatal error to capture device */
245 imx_media_capture_device_error(vdev);
246}
247
248static void csi_idmac_setup_vb2_buf(struct csi_priv *priv, dma_addr_t *phys)
249{
250 struct imx_media_video_dev *vdev = priv->vdev;
251 struct imx_media_buffer *buf;
252 int i;
253
254 for (i = 0; i < 2; i++) {
255 buf = imx_media_capture_device_next_buf(vdev);
256 if (buf) {
257 priv->active_vb2_buf[i] = buf;
258 phys[i] = vb2_dma_contig_plane_dma_addr(
259 &buf->vbuf.vb2_buf, 0);
260 } else {
261 priv->active_vb2_buf[i] = NULL;
262 phys[i] = priv->underrun_buf.phys;
263 }
264 }
265}
266
267static void csi_idmac_unsetup_vb2_buf(struct csi_priv *priv,
268 enum vb2_buffer_state return_status)
269{
270 struct imx_media_buffer *buf;
271 int i;
272
273 /* return any remaining active frames with return_status */
274 for (i = 0; i < 2; i++) {
275 buf = priv->active_vb2_buf[i];
276 if (buf) {
277 struct vb2_buffer *vb = &buf->vbuf.vb2_buf;
278
279 vb->timestamp = ktime_get_ns();
280 vb2_buffer_done(vb, return_status);
281 }
282 }
283}
284
285/* init the SMFC IDMAC channel */
286static int csi_idmac_setup_channel(struct csi_priv *priv)
287{
288 struct imx_media_video_dev *vdev = priv->vdev;
289 struct v4l2_fwnode_endpoint *sensor_ep;
290 struct v4l2_mbus_framefmt *infmt;
291 unsigned int burst_size;
292 struct ipu_image image;
293 dma_addr_t phys[2];
294 bool passthrough;
295 int ret;
296
297 infmt = &priv->format_mbus[CSI_SINK_PAD];
298 sensor_ep = &priv->sensor->sensor_ep;
299
300 ipu_cpmem_zero(priv->idmac_ch);
301
302 memset(&image, 0, sizeof(image));
303 image.pix = vdev->fmt.fmt.pix;
304 image.rect.width = image.pix.width;
305 image.rect.height = image.pix.height;
306
307 csi_idmac_setup_vb2_buf(priv, phys);
308
309 image.phys0 = phys[0];
310 image.phys1 = phys[1];
311
312 ret = ipu_cpmem_set_image(priv->idmac_ch, &image);
313 if (ret)
314 goto unsetup_vb2;
315
316 burst_size = (image.pix.width & 0xf) ? 8 : 16;
317
318 ipu_cpmem_set_burstsize(priv->idmac_ch, burst_size);
319
320 /*
321 * If the sensor uses 16-bit parallel CSI bus, we must handle
322 * the data internally in the IPU as 16-bit generic, aka
323 * passthrough mode.
324 */
325 passthrough = (sensor_ep->bus_type != V4L2_MBUS_CSI2 &&
326 sensor_ep->bus.parallel.bus_width >= 16);
327
328 if (passthrough)
329 ipu_cpmem_set_format_passthrough(priv->idmac_ch, 16);
330
331 /*
332 * Set the channel for the direct CSI-->memory via SMFC
333 * use-case to very high priority, by enabling the watermark
334 * signal in the SMFC, enabling WM in the channel, and setting
335 * the channel priority to high.
336 *
337 * Refer to the i.mx6 rev. D TRM Table 36-8: Calculated priority
338 * value.
339 *
340 * The WM's are set very low by intention here to ensure that
341 * the SMFC FIFOs do not overflow.
342 */
343 ipu_smfc_set_watermark(priv->smfc, 0x02, 0x01);
344 ipu_cpmem_set_high_priority(priv->idmac_ch);
345 ipu_idmac_enable_watermark(priv->idmac_ch, true);
346 ipu_cpmem_set_axi_id(priv->idmac_ch, 0);
347
348 burst_size = passthrough ?
349 (burst_size >> 3) - 1 : (burst_size >> 2) - 1;
350
351 ipu_smfc_set_burstsize(priv->smfc, burst_size);
352
353 if (image.pix.field == V4L2_FIELD_NONE &&
354 V4L2_FIELD_HAS_BOTH(infmt->field))
355 ipu_cpmem_interlaced_scan(priv->idmac_ch,
356 image.pix.bytesperline);
357
358 ipu_idmac_set_double_buffer(priv->idmac_ch, true);
359
360 return 0;
361
362unsetup_vb2:
363 csi_idmac_unsetup_vb2_buf(priv, VB2_BUF_STATE_QUEUED);
364 return ret;
365}
366
367static void csi_idmac_unsetup(struct csi_priv *priv,
368 enum vb2_buffer_state state)
369{
370 ipu_idmac_disable_channel(priv->idmac_ch);
371 ipu_smfc_disable(priv->smfc);
372
373 csi_idmac_unsetup_vb2_buf(priv, state);
374}
375
376static int csi_idmac_setup(struct csi_priv *priv)
377{
378 int ret;
379
380 ret = csi_idmac_setup_channel(priv);
381 if (ret)
382 return ret;
383
384 ipu_cpmem_dump(priv->idmac_ch);
385 ipu_dump(priv->ipu);
386
387 ipu_smfc_enable(priv->smfc);
388
389 /* set buffers ready */
390 ipu_idmac_select_buffer(priv->idmac_ch, 0);
391 ipu_idmac_select_buffer(priv->idmac_ch, 1);
392
393 /* enable the channels */
394 ipu_idmac_enable_channel(priv->idmac_ch);
395
396 return 0;
397}
398
399static int csi_idmac_start(struct csi_priv *priv)
400{
401 struct imx_media_video_dev *vdev = priv->vdev;
402 struct v4l2_pix_format *outfmt;
403 int ret;
404
405 ret = csi_idmac_get_ipu_resources(priv);
406 if (ret)
407 return ret;
408
409 ipu_smfc_map_channel(priv->smfc, priv->csi_id, priv->vc_num);
410
411 outfmt = &vdev->fmt.fmt.pix;
412
413 ret = imx_media_alloc_dma_buf(priv->md, &priv->underrun_buf,
414 outfmt->sizeimage);
415 if (ret)
416 goto out_put_ipu;
417
418 priv->ipu_buf_num = 0;
419
420 /* init EOF completion waitq */
421 init_completion(&priv->last_eof_comp);
422 priv->last_eof = false;
423 priv->nfb4eof = false;
424
425 ret = csi_idmac_setup(priv);
426 if (ret) {
427 v4l2_err(&priv->sd, "csi_idmac_setup failed: %d\n", ret);
428 goto out_free_dma_buf;
429 }
430
431 priv->nfb4eof_irq = ipu_idmac_channel_irq(priv->ipu,
432 priv->idmac_ch,
433 IPU_IRQ_NFB4EOF);
434 ret = devm_request_irq(priv->dev, priv->nfb4eof_irq,
435 csi_idmac_nfb4eof_interrupt, 0,
436 "imx-smfc-nfb4eof", priv);
437 if (ret) {
438 v4l2_err(&priv->sd,
439 "Error registering NFB4EOF irq: %d\n", ret);
440 goto out_unsetup;
441 }
442
443 priv->eof_irq = ipu_idmac_channel_irq(priv->ipu, priv->idmac_ch,
444 IPU_IRQ_EOF);
445
446 ret = devm_request_irq(priv->dev, priv->eof_irq,
447 csi_idmac_eof_interrupt, 0,
448 "imx-smfc-eof", priv);
449 if (ret) {
450 v4l2_err(&priv->sd,
451 "Error registering eof irq: %d\n", ret);
452 goto out_free_nfb4eof_irq;
453 }
454
455 /* start the EOF timeout timer */
456 mod_timer(&priv->eof_timeout_timer,
457 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT));
458
459 return 0;
460
461out_free_nfb4eof_irq:
462 devm_free_irq(priv->dev, priv->nfb4eof_irq, priv);
463out_unsetup:
464 csi_idmac_unsetup(priv, VB2_BUF_STATE_QUEUED);
465out_free_dma_buf:
466 imx_media_free_dma_buf(priv->md, &priv->underrun_buf);
467out_put_ipu:
468 csi_idmac_put_ipu_resources(priv);
469 return ret;
470}
471
472static void csi_idmac_stop(struct csi_priv *priv)
473{
474 unsigned long flags;
475 int ret;
476
477 /* mark next EOF interrupt as the last before stream off */
478 spin_lock_irqsave(&priv->irqlock, flags);
479 priv->last_eof = true;
480 spin_unlock_irqrestore(&priv->irqlock, flags);
481
482 /*
483 * and then wait for interrupt handler to mark completion.
484 */
485 ret = wait_for_completion_timeout(
486 &priv->last_eof_comp, msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT));
487 if (ret == 0)
488 v4l2_warn(&priv->sd, "wait last EOF timeout\n");
489
490 devm_free_irq(priv->dev, priv->eof_irq, priv);
491 devm_free_irq(priv->dev, priv->nfb4eof_irq, priv);
492
493 csi_idmac_unsetup(priv, VB2_BUF_STATE_ERROR);
494
495 imx_media_free_dma_buf(priv->md, &priv->underrun_buf);
496
497 /* cancel the EOF timeout timer */
498 del_timer_sync(&priv->eof_timeout_timer);
499
500 csi_idmac_put_ipu_resources(priv);
501}
502
503/* Update the CSI whole sensor and active windows */
504static int csi_setup(struct csi_priv *priv)
505{
506 struct v4l2_mbus_framefmt *infmt, *outfmt;
507 struct v4l2_mbus_config sensor_mbus_cfg;
508 struct v4l2_fwnode_endpoint *sensor_ep;
509 struct v4l2_mbus_framefmt if_fmt;
510
511 infmt = &priv->format_mbus[CSI_SINK_PAD];
512 outfmt = &priv->format_mbus[priv->active_output_pad];
513 sensor_ep = &priv->sensor->sensor_ep;
514
515 /* compose mbus_config from sensor endpoint */
516 sensor_mbus_cfg.type = sensor_ep->bus_type;
517 sensor_mbus_cfg.flags = (sensor_ep->bus_type == V4L2_MBUS_CSI2) ?
518 sensor_ep->bus.mipi_csi2.flags :
519 sensor_ep->bus.parallel.flags;
520
521 /*
522 * we need to pass input sensor frame to CSI interface, but
523 * with translated field type from output format
524 */
525 if_fmt = *infmt;
526 if_fmt.field = outfmt->field;
527
528 ipu_csi_set_window(priv->csi, &priv->crop);
529
530 ipu_csi_set_downsize(priv->csi,
531 priv->crop.width == 2 * outfmt->width,
532 priv->crop.height == 2 * outfmt->height);
533
534 ipu_csi_init_interface(priv->csi, &sensor_mbus_cfg, &if_fmt);
535
536 ipu_csi_set_dest(priv->csi, priv->dest);
537
538 ipu_csi_dump(priv->csi);
539
540 return 0;
541}
542
543static int csi_start(struct csi_priv *priv)
544{
545 u32 bad_frames = 0;
546 int ret;
547
548 if (!priv->sensor) {
549 v4l2_err(&priv->sd, "no sensor attached\n");
550 return -EINVAL;
551 }
552
553 ret = v4l2_subdev_call(priv->sensor->sd, sensor,
554 g_skip_frames, &bad_frames);
555 if (!ret && bad_frames) {
556 struct v4l2_fract *fi = &priv->frame_interval;
557 u32 delay_usec;
558
559 /*
560 * This sensor has bad frames when it is turned on,
561 * add a delay to avoid them before enabling the CSI
562 * hardware. Especially for sensors with a bt.656 interface,
563 * any shifts in the SAV/EAV sync codes will cause the CSI
564 * to lose vert/horiz sync.
565 */
566 delay_usec = DIV_ROUND_UP_ULL(
567 (u64)USEC_PER_SEC * fi->numerator * bad_frames,
568 fi->denominator);
569 usleep_range(delay_usec, delay_usec + 1000);
570 }
571
572 if (priv->dest == IPU_CSI_DEST_IDMAC) {
573 ret = csi_idmac_start(priv);
574 if (ret)
575 return ret;
576 }
577
578 ret = csi_setup(priv);
579 if (ret)
580 goto idmac_stop;
581
582 /* start the frame interval monitor */
583 if (priv->fim && priv->dest == IPU_CSI_DEST_IDMAC) {
584 ret = imx_media_fim_set_stream(priv->fim, &priv->frame_interval,
585 true);
586 if (ret)
587 goto idmac_stop;
588 }
589
590 ret = ipu_csi_enable(priv->csi);
591 if (ret) {
592 v4l2_err(&priv->sd, "CSI enable error: %d\n", ret);
593 goto fim_off;
594 }
595
596 return 0;
597
598fim_off:
599 if (priv->fim && priv->dest == IPU_CSI_DEST_IDMAC)
600 imx_media_fim_set_stream(priv->fim, &priv->frame_interval,
601 false);
602idmac_stop:
603 if (priv->dest == IPU_CSI_DEST_IDMAC)
604 csi_idmac_stop(priv);
605 return ret;
606}
607
608static void csi_stop(struct csi_priv *priv)
609{
610 if (priv->dest == IPU_CSI_DEST_IDMAC) {
611 csi_idmac_stop(priv);
612
613 /* stop the frame interval monitor */
614 if (priv->fim)
615 imx_media_fim_set_stream(priv->fim,
616 &priv->frame_interval,
617 false);
618 }
619
620 ipu_csi_disable(priv->csi);
621}
622
623/*
624 * V4L2 subdev operations.
625 */
626
627static int csi_g_frame_interval(struct v4l2_subdev *sd,
628 struct v4l2_subdev_frame_interval *fi)
629{
630 struct csi_priv *priv = v4l2_get_subdevdata(sd);
631
632 mutex_lock(&priv->lock);
633 fi->interval = priv->frame_interval;
634 mutex_unlock(&priv->lock);
635
636 return 0;
637}
638
639static int csi_s_frame_interval(struct v4l2_subdev *sd,
640 struct v4l2_subdev_frame_interval *fi)
641{
642 struct csi_priv *priv = v4l2_get_subdevdata(sd);
643
644 mutex_lock(&priv->lock);
645
646 /* Output pads mirror active input pad, no limits on input pads */
647 if (fi->pad == CSI_SRC_PAD_IDMAC || fi->pad == CSI_SRC_PAD_DIRECT)
648 fi->interval = priv->frame_interval;
649
650 priv->frame_interval = fi->interval;
651
652 mutex_unlock(&priv->lock);
653
654 return 0;
655}
656
657static int csi_s_stream(struct v4l2_subdev *sd, int enable)
658{
659 struct csi_priv *priv = v4l2_get_subdevdata(sd);
660 int ret = 0;
661
662 mutex_lock(&priv->lock);
663
664 if (!priv->src_sd || !priv->sink) {
665 ret = -EPIPE;
666 goto out;
667 }
668
669 /*
670 * enable/disable streaming only if stream_count is
671 * going from 0 to 1 / 1 to 0.
672 */
673 if (priv->stream_count != !enable)
674 goto update_count;
675
676 if (enable) {
677 /* upstream must be started first, before starting CSI */
678 ret = v4l2_subdev_call(priv->src_sd, video, s_stream, 1);
679 ret = (ret && ret != -ENOIOCTLCMD) ? ret : 0;
680 if (ret)
681 goto out;
682
683 dev_dbg(priv->dev, "stream ON\n");
684 ret = csi_start(priv);
685 if (ret) {
686 v4l2_subdev_call(priv->src_sd, video, s_stream, 0);
687 goto out;
688 }
689 } else {
690 dev_dbg(priv->dev, "stream OFF\n");
691 /* CSI must be stopped first, then stop upstream */
692 csi_stop(priv);
693 v4l2_subdev_call(priv->src_sd, video, s_stream, 0);
694 }
695
696update_count:
697 priv->stream_count += enable ? 1 : -1;
698 WARN_ON(priv->stream_count < 0);
699out:
700 mutex_unlock(&priv->lock);
701 return ret;
702}
703
704static int csi_link_setup(struct media_entity *entity,
705 const struct media_pad *local,
706 const struct media_pad *remote, u32 flags)
707{
708 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
709 struct csi_priv *priv = v4l2_get_subdevdata(sd);
710 struct v4l2_subdev *remote_sd;
711 int ret = 0;
712
713 dev_dbg(priv->dev, "link setup %s -> %s\n", remote->entity->name,
714 local->entity->name);
715
716 mutex_lock(&priv->lock);
717
718 if (local->flags & MEDIA_PAD_FL_SINK) {
719 if (!is_media_entity_v4l2_subdev(remote->entity)) {
720 ret = -EINVAL;
721 goto out;
722 }
723
724 remote_sd = media_entity_to_v4l2_subdev(remote->entity);
725
726 if (flags & MEDIA_LNK_FL_ENABLED) {
727 if (priv->src_sd) {
728 ret = -EBUSY;
729 goto out;
730 }
731 priv->src_sd = remote_sd;
732 } else {
733 priv->src_sd = NULL;
734 }
735
736 goto out;
737 }
738
739 /* this is a source pad */
740
741 if (flags & MEDIA_LNK_FL_ENABLED) {
742 if (priv->sink) {
743 ret = -EBUSY;
744 goto out;
745 }
746 } else {
747 v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
748 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0);
749 priv->sink = NULL;
750 goto out;
751 }
752
753 /* record which output pad is now active */
754 priv->active_output_pad = local->index;
755
756 /* set CSI destination */
757 if (local->index == CSI_SRC_PAD_IDMAC) {
758 if (!is_media_entity_v4l2_video_device(remote->entity)) {
759 ret = -EINVAL;
760 goto out;
761 }
762
763 if (priv->fim) {
764 ret = imx_media_fim_add_controls(priv->fim);
765 if (ret)
766 goto out;
767 }
768
769 priv->dest = IPU_CSI_DEST_IDMAC;
770 } else {
771 if (!is_media_entity_v4l2_subdev(remote->entity)) {
772 ret = -EINVAL;
773 goto out;
774 }
775
776 remote_sd = media_entity_to_v4l2_subdev(remote->entity);
777 switch (remote_sd->grp_id) {
778 case IMX_MEDIA_GRP_ID_VDIC:
779 priv->dest = IPU_CSI_DEST_VDIC;
780 break;
781 case IMX_MEDIA_GRP_ID_IC_PRP:
782 priv->dest = IPU_CSI_DEST_IC;
783 break;
784 default:
785 ret = -EINVAL;
786 goto out;
787 }
788 }
789
790 priv->sink = remote->entity;
791out:
792 mutex_unlock(&priv->lock);
793 return ret;
794}
795
796static int csi_link_validate(struct v4l2_subdev *sd,
797 struct media_link *link,
798 struct v4l2_subdev_format *source_fmt,
799 struct v4l2_subdev_format *sink_fmt)
800{
801 struct csi_priv *priv = v4l2_get_subdevdata(sd);
802 struct v4l2_fwnode_endpoint *sensor_ep;
803 struct imx_media_subdev *sensor;
804 bool is_csi2;
805 int ret;
806
807 ret = v4l2_subdev_link_validate_default(sd, link,
808 source_fmt, sink_fmt);
809 if (ret)
810 return ret;
811
812 sensor = __imx_media_find_sensor(priv->md, &priv->sd.entity);
813 if (IS_ERR(sensor)) {
814 v4l2_err(&priv->sd, "no sensor attached\n");
815 return PTR_ERR(priv->sensor);
816 }
817
818 mutex_lock(&priv->lock);
819
820 priv->sensor = sensor;
821 sensor_ep = &priv->sensor->sensor_ep;
822 is_csi2 = (sensor_ep->bus_type == V4L2_MBUS_CSI2);
823
824 if (is_csi2) {
825 int vc_num = 0;
826 /*
827 * NOTE! It seems the virtual channels from the mipi csi-2
828 * receiver are used only for routing by the video mux's,
829 * or for hard-wired routing to the CSI's. Once the stream
830 * enters the CSI's however, they are treated internally
831 * in the IPU as virtual channel 0.
832 */
833#if 0
834 mutex_unlock(&priv->lock);
835 vc_num = imx_media_find_mipi_csi2_channel(priv->md,
836 &priv->sd.entity);
837 if (vc_num < 0)
838 return vc_num;
839 mutex_lock(&priv->lock);
840#endif
841 ipu_csi_set_mipi_datatype(priv->csi, vc_num,
842 &priv->format_mbus[CSI_SINK_PAD]);
843 }
844
845 /* select either parallel or MIPI-CSI2 as input to CSI */
846 ipu_set_csi_src_mux(priv->ipu, priv->csi_id, is_csi2);
847
848 mutex_unlock(&priv->lock);
849 return ret;
850}
851
852static struct v4l2_mbus_framefmt *
853__csi_get_fmt(struct csi_priv *priv, struct v4l2_subdev_pad_config *cfg,
854 unsigned int pad, enum v4l2_subdev_format_whence which)
855{
856 if (which == V4L2_SUBDEV_FORMAT_TRY)
857 return v4l2_subdev_get_try_format(&priv->sd, cfg, pad);
858 else
859 return &priv->format_mbus[pad];
860}
861
862static struct v4l2_rect *
863__csi_get_crop(struct csi_priv *priv, struct v4l2_subdev_pad_config *cfg,
864 enum v4l2_subdev_format_whence which)
865{
866 if (which == V4L2_SUBDEV_FORMAT_TRY)
867 return v4l2_subdev_get_try_crop(&priv->sd, cfg, CSI_SINK_PAD);
868 else
869 return &priv->crop;
870}
871
872static void csi_try_crop(struct csi_priv *priv,
873 struct v4l2_rect *crop,
874 struct v4l2_subdev_pad_config *cfg,
875 struct v4l2_mbus_framefmt *infmt,
876 struct imx_media_subdev *sensor)
877{
878 struct v4l2_fwnode_endpoint *sensor_ep;
879
880 sensor_ep = &sensor->sensor_ep;
881
882 crop->width = min_t(__u32, infmt->width, crop->width);
883 if (crop->left + crop->width > infmt->width)
884 crop->left = infmt->width - crop->width;
885 /* adjust crop left/width to h/w alignment restrictions */
886 crop->left &= ~0x3;
887 crop->width &= ~0x7;
888
889 /*
890 * FIXME: not sure why yet, but on interlaced bt.656,
891 * changing the vertical cropping causes loss of vertical
892 * sync, so fix it to NTSC/PAL active lines. NTSC contains
893 * 2 extra lines of active video that need to be cropped.
894 */
895 if (sensor_ep->bus_type == V4L2_MBUS_BT656 &&
896 (V4L2_FIELD_HAS_BOTH(infmt->field) ||
897 infmt->field == V4L2_FIELD_ALTERNATE)) {
898 crop->height = infmt->height;
899 crop->top = (infmt->height == 480) ? 2 : 0;
900 } else {
901 crop->height = min_t(__u32, infmt->height, crop->height);
902 if (crop->top + crop->height > infmt->height)
903 crop->top = infmt->height - crop->height;
904 }
905}
906
907static int csi_enum_mbus_code(struct v4l2_subdev *sd,
908 struct v4l2_subdev_pad_config *cfg,
909 struct v4l2_subdev_mbus_code_enum *code)
910{
911 struct csi_priv *priv = v4l2_get_subdevdata(sd);
912 const struct imx_media_pixfmt *incc;
913 struct v4l2_mbus_framefmt *infmt;
914 int ret = 0;
915
916 mutex_lock(&priv->lock);
917
918 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, code->which);
919 incc = imx_media_find_mbus_format(infmt->code, CS_SEL_ANY, true);
920
921 switch (code->pad) {
922 case CSI_SINK_PAD:
923 ret = imx_media_enum_mbus_format(&code->code, code->index,
924 CS_SEL_ANY, true);
925 break;
926 case CSI_SRC_PAD_DIRECT:
927 case CSI_SRC_PAD_IDMAC:
928 if (incc->bayer) {
929 if (code->index != 0) {
930 ret = -EINVAL;
931 goto out;
932 }
933 code->code = infmt->code;
934 } else {
935 u32 cs_sel = (incc->cs == IPUV3_COLORSPACE_YUV) ?
936 CS_SEL_YUV : CS_SEL_RGB;
937 ret = imx_media_enum_ipu_format(&code->code,
938 code->index,
939 cs_sel);
940 }
941 break;
942 default:
943 ret = -EINVAL;
944 }
945
946out:
947 mutex_unlock(&priv->lock);
948 return ret;
949}
950
951static int csi_get_fmt(struct v4l2_subdev *sd,
952 struct v4l2_subdev_pad_config *cfg,
953 struct v4l2_subdev_format *sdformat)
954{
955 struct csi_priv *priv = v4l2_get_subdevdata(sd);
956 struct v4l2_mbus_framefmt *fmt;
957 int ret = 0;
958
959 if (sdformat->pad >= CSI_NUM_PADS)
960 return -EINVAL;
961
962 mutex_lock(&priv->lock);
963
964 fmt = __csi_get_fmt(priv, cfg, sdformat->pad, sdformat->which);
965 if (!fmt) {
966 ret = -EINVAL;
967 goto out;
968 }
969
970 sdformat->format = *fmt;
971out:
972 mutex_unlock(&priv->lock);
973 return ret;
974}
975
976static void csi_try_fmt(struct csi_priv *priv,
977 struct imx_media_subdev *sensor,
978 struct v4l2_subdev_pad_config *cfg,
979 struct v4l2_subdev_format *sdformat,
980 struct v4l2_rect *crop,
981 const struct imx_media_pixfmt **cc)
982{
983 const struct imx_media_pixfmt *incc;
984 struct v4l2_mbus_framefmt *infmt;
985 u32 code;
986
987 switch (sdformat->pad) {
988 case CSI_SRC_PAD_DIRECT:
989 case CSI_SRC_PAD_IDMAC:
990 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD,
991 sdformat->which);
992 incc = imx_media_find_mbus_format(infmt->code,
993 CS_SEL_ANY, true);
994
995 if (sdformat->format.width < crop->width * 3 / 4)
996 sdformat->format.width = crop->width / 2;
997 else
998 sdformat->format.width = crop->width;
999
1000 if (sdformat->format.height < crop->height * 3 / 4)
1001 sdformat->format.height = crop->height / 2;
1002 else
1003 sdformat->format.height = crop->height;
1004
1005 if (incc->bayer) {
1006 sdformat->format.code = infmt->code;
1007 *cc = incc;
1008 } else {
1009 u32 cs_sel = (incc->cs == IPUV3_COLORSPACE_YUV) ?
1010 CS_SEL_YUV : CS_SEL_RGB;
1011
1012 *cc = imx_media_find_ipu_format(sdformat->format.code,
1013 cs_sel);
1014 if (!*cc) {
1015 imx_media_enum_ipu_format(&code, 0, cs_sel);
1016 *cc = imx_media_find_ipu_format(code, cs_sel);
1017 sdformat->format.code = (*cc)->codes[0];
1018 }
1019 }
1020
1021 if (sdformat->pad == CSI_SRC_PAD_DIRECT ||
1022 sdformat->format.field != V4L2_FIELD_NONE)
1023 sdformat->format.field = infmt->field;
1024
1025 /*
1026 * translate V4L2_FIELD_ALTERNATE to SEQ_TB or SEQ_BT
1027 * depending on input height (assume NTSC top-bottom
1028 * order if 480 lines, otherwise PAL bottom-top order).
1029 */
1030 if (sdformat->format.field == V4L2_FIELD_ALTERNATE) {
1031 sdformat->format.field = (infmt->height == 480) ?
1032 V4L2_FIELD_SEQ_TB : V4L2_FIELD_SEQ_BT;
1033 }
1034 break;
1035 case CSI_SINK_PAD:
1036 v4l_bound_align_image(&sdformat->format.width, MIN_W, MAX_W,
1037 W_ALIGN, &sdformat->format.height,
1038 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
1039 crop->left = 0;
1040 crop->top = 0;
1041 crop->width = sdformat->format.width;
1042 crop->height = sdformat->format.height;
1043 csi_try_crop(priv, crop, cfg, &sdformat->format, sensor);
1044
1045 *cc = imx_media_find_mbus_format(sdformat->format.code,
1046 CS_SEL_ANY, true);
1047 if (!*cc) {
1048 imx_media_enum_mbus_format(&code, 0,
1049 CS_SEL_ANY, false);
1050 *cc = imx_media_find_mbus_format(code,
1051 CS_SEL_ANY, false);
1052 sdformat->format.code = (*cc)->codes[0];
1053 }
1054 break;
1055 }
1056}
1057
1058static int csi_set_fmt(struct v4l2_subdev *sd,
1059 struct v4l2_subdev_pad_config *cfg,
1060 struct v4l2_subdev_format *sdformat)
1061{
1062 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1063 struct imx_media_video_dev *vdev = priv->vdev;
1064 const struct imx_media_pixfmt *cc;
1065 struct imx_media_subdev *sensor;
1066 struct v4l2_pix_format vdev_fmt;
1067 struct v4l2_mbus_framefmt *fmt;
1068 struct v4l2_rect *crop;
1069 int ret = 0;
1070
1071 if (sdformat->pad >= CSI_NUM_PADS)
1072 return -EINVAL;
1073
1074 sensor = imx_media_find_sensor(priv->md, &priv->sd.entity);
1075 if (IS_ERR(sensor)) {
1076 v4l2_err(&priv->sd, "no sensor attached\n");
1077 return PTR_ERR(sensor);
1078 }
1079
1080 mutex_lock(&priv->lock);
1081
1082 if (priv->stream_count > 0) {
1083 ret = -EBUSY;
1084 goto out;
1085 }
1086
1087 crop = __csi_get_crop(priv, cfg, sdformat->which);
1088
1089 csi_try_fmt(priv, sensor, cfg, sdformat, crop, &cc);
1090
1091 fmt = __csi_get_fmt(priv, cfg, sdformat->pad, sdformat->which);
1092 *fmt = sdformat->format;
1093
1094 if (sdformat->pad == CSI_SINK_PAD) {
1095 int pad;
1096
1097 /* propagate format to source pads */
1098 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) {
1099 const struct imx_media_pixfmt *outcc;
1100 struct v4l2_mbus_framefmt *outfmt;
1101 struct v4l2_subdev_format format;
1102
1103 format.pad = pad;
1104 format.which = sdformat->which;
1105 format.format = sdformat->format;
1106 csi_try_fmt(priv, sensor, cfg, &format, crop, &outcc);
1107
1108 outfmt = __csi_get_fmt(priv, cfg, pad, sdformat->which);
1109 *outfmt = format.format;
1110
1111 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
1112 priv->cc[pad] = outcc;
1113 }
1114 }
1115
1116 if (sdformat->which == V4L2_SUBDEV_FORMAT_TRY)
1117 goto out;
1118
1119 priv->cc[sdformat->pad] = cc;
1120
1121 /* propagate IDMAC output pad format to capture device */
1122 imx_media_mbus_fmt_to_pix_fmt(&vdev_fmt,
1123 &priv->format_mbus[CSI_SRC_PAD_IDMAC],
1124 priv->cc[CSI_SRC_PAD_IDMAC]);
1125 mutex_unlock(&priv->lock);
1126 imx_media_capture_device_set_format(vdev, &vdev_fmt);
1127
1128 return 0;
1129out:
1130 mutex_unlock(&priv->lock);
1131 return ret;
1132}
1133
1134static int csi_get_selection(struct v4l2_subdev *sd,
1135 struct v4l2_subdev_pad_config *cfg,
1136 struct v4l2_subdev_selection *sel)
1137{
1138 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1139 struct v4l2_mbus_framefmt *infmt;
1140 struct v4l2_rect *crop;
1141 int ret = 0;
1142
1143 if (sel->pad >= CSI_NUM_PADS || sel->pad == CSI_SINK_PAD)
1144 return -EINVAL;
1145
1146 mutex_lock(&priv->lock);
1147
1148 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, sel->which);
1149 crop = __csi_get_crop(priv, cfg, sel->which);
1150
1151 switch (sel->target) {
1152 case V4L2_SEL_TGT_CROP_BOUNDS:
1153 sel->r.left = 0;
1154 sel->r.top = 0;
1155 sel->r.width = infmt->width;
1156 sel->r.height = infmt->height;
1157 break;
1158 case V4L2_SEL_TGT_CROP:
1159 sel->r = *crop;
1160 break;
1161 default:
1162 ret = -EINVAL;
1163 }
1164
1165 mutex_unlock(&priv->lock);
1166 return ret;
1167}
1168
1169static int csi_set_selection(struct v4l2_subdev *sd,
1170 struct v4l2_subdev_pad_config *cfg,
1171 struct v4l2_subdev_selection *sel)
1172{
1173 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1174 struct v4l2_mbus_framefmt *infmt;
1175 struct imx_media_subdev *sensor;
1176 struct v4l2_rect *crop;
1177 int pad, ret = 0;
1178
1179 if (sel->pad >= CSI_NUM_PADS ||
1180 sel->pad == CSI_SINK_PAD ||
1181 sel->target != V4L2_SEL_TGT_CROP)
1182 return -EINVAL;
1183
1184 sensor = imx_media_find_sensor(priv->md, &priv->sd.entity);
1185 if (IS_ERR(sensor)) {
1186 v4l2_err(&priv->sd, "no sensor attached\n");
1187 return PTR_ERR(sensor);
1188 }
1189
1190 mutex_lock(&priv->lock);
1191
1192 if (priv->stream_count > 0) {
1193 ret = -EBUSY;
1194 goto out;
1195 }
1196
1197 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, sel->which);
1198 crop = __csi_get_crop(priv, cfg, sel->which);
1199
1200 /*
1201 * Modifying the crop rectangle always changes the format on the source
1202 * pad. If the KEEP_CONFIG flag is set, just return the current crop
1203 * rectangle.
1204 */
1205 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) {
1206 sel->r = priv->crop;
1207 if (sel->which == V4L2_SUBDEV_FORMAT_TRY)
1208 *crop = sel->r;
1209 goto out;
1210 }
1211
1212 csi_try_crop(priv, &sel->r, cfg, infmt, sensor);
1213
1214 *crop = sel->r;
1215
1216 /* Update the source pad formats */
1217 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) {
1218 struct v4l2_mbus_framefmt *outfmt;
1219
1220 outfmt = __csi_get_fmt(priv, cfg, pad, sel->which);
1221 outfmt->width = crop->width;
1222 outfmt->height = crop->height;
1223 }
1224
1225out:
1226 mutex_unlock(&priv->lock);
1227 return ret;
1228}
1229
1230static int csi_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
1231 struct v4l2_event_subscription *sub)
1232{
1233 if (sub->type != V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR)
1234 return -EINVAL;
1235 if (sub->id != 0)
1236 return -EINVAL;
1237
1238 return v4l2_event_subscribe(fh, sub, 0, NULL);
1239}
1240
1241static int csi_unsubscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
1242 struct v4l2_event_subscription *sub)
1243{
1244 return v4l2_event_unsubscribe(fh, sub);
1245}
1246
1247/*
1248 * retrieve our pads parsed from the OF graph by the media device
1249 */
1250static int csi_registered(struct v4l2_subdev *sd)
1251{
1252 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1253 int i, ret;
1254 u32 code;
1255
1256 /* get media device */
1257 priv->md = dev_get_drvdata(sd->v4l2_dev->dev);
1258
1259 /* get handle to IPU CSI */
1260 priv->csi = ipu_csi_get(priv->ipu, priv->csi_id);
1261 if (IS_ERR(priv->csi)) {
1262 v4l2_err(&priv->sd, "failed to get CSI%d\n", priv->csi_id);
1263 return PTR_ERR(priv->csi);
1264 }
1265
1266 for (i = 0; i < CSI_NUM_PADS; i++) {
1267 priv->pad[i].flags = (i == CSI_SINK_PAD) ?
1268 MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE;
1269
1270 code = 0;
1271 if (i != CSI_SINK_PAD)
1272 imx_media_enum_ipu_format(&code, 0, CS_SEL_YUV);
1273
1274 /* set a default mbus format */
1275 ret = imx_media_init_mbus_fmt(&priv->format_mbus[i],
1276 640, 480, code, V4L2_FIELD_NONE,
1277 &priv->cc[i]);
1278 if (ret)
1279 goto put_csi;
1280 }
1281
1282 /* init default frame interval */
1283 priv->frame_interval.numerator = 1;
1284 priv->frame_interval.denominator = 30;
1285
1286 priv->fim = imx_media_fim_init(&priv->sd);
1287 if (IS_ERR(priv->fim)) {
1288 ret = PTR_ERR(priv->fim);
1289 goto put_csi;
1290 }
1291
1292 ret = media_entity_pads_init(&sd->entity, CSI_NUM_PADS, priv->pad);
1293 if (ret)
1294 goto free_fim;
1295
1296 ret = imx_media_capture_device_register(priv->vdev);
1297 if (ret)
1298 goto free_fim;
1299
1300 ret = imx_media_add_video_device(priv->md, priv->vdev);
1301 if (ret)
1302 goto unreg;
1303
1304 return 0;
1305unreg:
1306 imx_media_capture_device_unregister(priv->vdev);
1307free_fim:
1308 if (priv->fim)
1309 imx_media_fim_free(priv->fim);
1310put_csi:
1311 ipu_csi_put(priv->csi);
1312 return ret;
1313}
1314
1315static void csi_unregistered(struct v4l2_subdev *sd)
1316{
1317 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1318
1319 imx_media_capture_device_unregister(priv->vdev);
1320
1321 if (priv->fim)
1322 imx_media_fim_free(priv->fim);
1323
1324 if (!IS_ERR_OR_NULL(priv->csi))
1325 ipu_csi_put(priv->csi);
1326}
1327
1328static const struct media_entity_operations csi_entity_ops = {
1329 .link_setup = csi_link_setup,
1330 .link_validate = v4l2_subdev_link_validate,
1331};
1332
1333static const struct v4l2_subdev_core_ops csi_core_ops = {
1334 .subscribe_event = csi_subscribe_event,
1335 .unsubscribe_event = csi_unsubscribe_event,
1336};
1337
1338static const struct v4l2_subdev_video_ops csi_video_ops = {
1339 .g_frame_interval = csi_g_frame_interval,
1340 .s_frame_interval = csi_s_frame_interval,
1341 .s_stream = csi_s_stream,
1342};
1343
1344static const struct v4l2_subdev_pad_ops csi_pad_ops = {
1345 .enum_mbus_code = csi_enum_mbus_code,
1346 .get_fmt = csi_get_fmt,
1347 .set_fmt = csi_set_fmt,
1348 .get_selection = csi_get_selection,
1349 .set_selection = csi_set_selection,
1350 .link_validate = csi_link_validate,
1351};
1352
1353static const struct v4l2_subdev_ops csi_subdev_ops = {
1354 .core = &csi_core_ops,
1355 .video = &csi_video_ops,
1356 .pad = &csi_pad_ops,
1357};
1358
1359static const struct v4l2_subdev_internal_ops csi_internal_ops = {
1360 .registered = csi_registered,
1361 .unregistered = csi_unregistered,
1362};
1363
1364static int imx_csi_probe(struct platform_device *pdev)
1365{
1366 struct ipu_client_platformdata *pdata;
1367 struct pinctrl *pinctrl;
1368 struct csi_priv *priv;
1369 int ret;
1370
1371 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
1372 if (!priv)
1373 return -ENOMEM;
1374
1375 platform_set_drvdata(pdev, &priv->sd);
1376 priv->dev = &pdev->dev;
1377
1378 ret = dma_set_coherent_mask(priv->dev, DMA_BIT_MASK(32));
1379 if (ret)
1380 return ret;
1381
1382 /* get parent IPU */
1383 priv->ipu = dev_get_drvdata(priv->dev->parent);
1384
1385 /* get our CSI id */
1386 pdata = priv->dev->platform_data;
1387 priv->csi_id = pdata->csi;
1388 priv->smfc_id = (priv->csi_id == 0) ? 0 : 2;
1389
1390 init_timer(&priv->eof_timeout_timer);
1391 priv->eof_timeout_timer.data = (unsigned long)priv;
1392 priv->eof_timeout_timer.function = csi_idmac_eof_timeout;
1393 spin_lock_init(&priv->irqlock);
1394
1395 v4l2_subdev_init(&priv->sd, &csi_subdev_ops);
1396 v4l2_set_subdevdata(&priv->sd, priv);
1397 priv->sd.internal_ops = &csi_internal_ops;
1398 priv->sd.entity.ops = &csi_entity_ops;
1399 priv->sd.entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
1400 priv->sd.dev = &pdev->dev;
1401 priv->sd.fwnode = of_fwnode_handle(pdata->of_node);
1402 priv->sd.owner = THIS_MODULE;
1403 priv->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
1404 priv->sd.grp_id = priv->csi_id ?
1405 IMX_MEDIA_GRP_ID_CSI1 : IMX_MEDIA_GRP_ID_CSI0;
1406 imx_media_grp_id_to_sd_name(priv->sd.name, sizeof(priv->sd.name),
1407 priv->sd.grp_id, ipu_get_num(priv->ipu));
1408
1409 priv->vdev = imx_media_capture_device_init(&priv->sd,
1410 CSI_SRC_PAD_IDMAC);
1411 if (IS_ERR(priv->vdev))
1412 return PTR_ERR(priv->vdev);
1413
1414 mutex_init(&priv->lock);
1415
1416 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0);
1417 priv->sd.ctrl_handler = &priv->ctrl_hdlr;
1418
1419 /*
1420 * The IPUv3 driver did not assign an of_node to this
1421 * device. As a result, pinctrl does not automatically
1422 * configure our pin groups, so we need to do that manually
1423 * here, after setting this device's of_node.
1424 */
1425 priv->dev->of_node = pdata->of_node;
1426 pinctrl = devm_pinctrl_get_select_default(priv->dev);
1427
1428 ret = v4l2_async_register_subdev(&priv->sd);
1429 if (ret)
1430 goto free;
1431
1432 return 0;
1433free:
1434 v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
1435 mutex_destroy(&priv->lock);
1436 imx_media_capture_device_remove(priv->vdev);
1437 return ret;
1438}
1439
1440static int imx_csi_remove(struct platform_device *pdev)
1441{
1442 struct v4l2_subdev *sd = platform_get_drvdata(pdev);
1443 struct csi_priv *priv = sd_to_dev(sd);
1444
1445 v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
1446 mutex_destroy(&priv->lock);
1447 imx_media_capture_device_remove(priv->vdev);
1448 v4l2_async_unregister_subdev(sd);
1449 media_entity_cleanup(&sd->entity);
1450
1451 return 0;
1452}
1453
1454static const struct platform_device_id imx_csi_ids[] = {
1455 { .name = "imx-ipuv3-csi" },
1456 { },
1457};
1458MODULE_DEVICE_TABLE(platform, imx_csi_ids);
1459
1460static struct platform_driver imx_csi_driver = {
1461 .probe = imx_csi_probe,
1462 .remove = imx_csi_remove,
1463 .id_table = imx_csi_ids,
1464 .driver = {
1465 .name = "imx-ipuv3-csi",
1466 },
1467};
1468module_platform_driver(imx_csi_driver);
1469
1470MODULE_DESCRIPTION("i.MX CSI subdev driver");
1471MODULE_AUTHOR("Steve Longerbeam <steve_longerbeam@mentor.com>");
1472MODULE_LICENSE("GPL");
1473MODULE_ALIAS("platform:imx-ipuv3-csi");
Linux 6.x block layer and io_uring tree(s)