1 /*
2 * V4L2 Capture CSI Subdev for Freescale i.MX5/6 SOC
3 *
4 * Copyright (c) 2014-2017 Mentor Graphics Inc.
5 * Copyright (C) 2017 Pengutronix, Philipp Zabel <kernel@pengutronix.de>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 */
12 #include <linux/delay.h>
13 #include <linux/gcd.h>
14 #include <linux/interrupt.h>
15 #include <linux/module.h>
16 #include <linux/of_graph.h>
17 #include <linux/pinctrl/consumer.h>
18 #include <linux/platform_device.h>
19 #include <media/v4l2-ctrls.h>
20 #include <media/v4l2-device.h>
21 #include <media/v4l2-event.h>
22 #include <media/v4l2-fwnode.h>
23 #include <media/v4l2-mc.h>
24 #include <media/v4l2-subdev.h>
25 #include <media/videobuf2-dma-contig.h>
26 #include <video/imx-ipu-v3.h>
27 #include <media/imx.h>
28 #include "imx-media.h"
29
30 /*
31 * Min/Max supported width and heights.
32 *
33 * We allow planar output, so we have to align width by 16 pixels
34 * to meet IDMAC alignment requirements.
35 *
36 * TODO: move this into pad format negotiation, if capture device
37 * has not requested planar formats, we should allow 8 pixel
38 * alignment.
39 */
40 #define MIN_W 176
41 #define MIN_H 144
42 #define MAX_W 4096
43 #define MAX_H 4096
44 #define W_ALIGN 4 /* multiple of 16 pixels */
45 #define H_ALIGN 1 /* multiple of 2 lines */
46 #define S_ALIGN 1 /* multiple of 2 */
47
48 /*
49 * struct csi_skip_desc - CSI frame skipping descriptor
50 * @keep - number of frames kept per max_ratio frames
51 * @max_ratio - width of skip_smfc, written to MAX_RATIO bitfield
52 * @skip_smfc - skip pattern written to the SKIP_SMFC bitfield
53 */
54 struct csi_skip_desc {
55 u8 keep;
56 u8 max_ratio;
57 u8 skip_smfc;
58 };
59
60 struct csi_priv {
61 struct device *dev;
62 struct ipu_soc *ipu;
63 struct imx_media_dev *md;
64 struct v4l2_subdev sd;
65 struct media_pad pad[CSI_NUM_PADS];
66 /* the video device at IDMAC output pad */
67 struct imx_media_video_dev *vdev;
68 struct imx_media_fim *fim;
69 int csi_id;
70 int smfc_id;
71
72 /* lock to protect all members below */
73 struct mutex lock;
74
75 int active_output_pad;
76
77 struct ipuv3_channel *idmac_ch;
78 struct ipu_smfc *smfc;
79 struct ipu_csi *csi;
80
81 struct v4l2_mbus_framefmt format_mbus[CSI_NUM_PADS];
82 const struct imx_media_pixfmt *cc[CSI_NUM_PADS];
83 struct v4l2_fract frame_interval[CSI_NUM_PADS];
84 struct v4l2_rect crop;
85 struct v4l2_rect compose;
86 const struct csi_skip_desc *skip;
87
88 /* active vb2 buffers to send to video dev sink */
89 struct imx_media_buffer *active_vb2_buf[2];
90 struct imx_media_dma_buf underrun_buf;
91
92 int ipu_buf_num; /* ipu double buffer index: 0-1 */
93
94 /* the sink for the captured frames */
95 struct media_entity *sink;
96 enum ipu_csi_dest dest;
97 /* the source subdev */
98 struct v4l2_subdev *src_sd;
99
100 /* the mipi virtual channel number at link validate */
101 int vc_num;
102
103 /* the upstream endpoint CSI is receiving from */
104 struct v4l2_fwnode_endpoint upstream_ep;
105
106 spinlock_t irqlock; /* protect eof_irq handler */
107 struct timer_list eof_timeout_timer;
108 int eof_irq;
109 int nfb4eof_irq;
110
111 struct v4l2_ctrl_handler ctrl_hdlr;
112
113 int stream_count; /* streaming counter */
114 u32 frame_sequence; /* frame sequence counter */
115 bool last_eof; /* waiting for last EOF at stream off */
116 bool nfb4eof; /* NFB4EOF encountered during streaming */
117 struct completion last_eof_comp;
118 };
119
sd_to_dev(struct v4l2_subdev * sdev)120 static inline struct csi_priv *sd_to_dev(struct v4l2_subdev *sdev)
121 {
122 return container_of(sdev, struct csi_priv, sd);
123 }
124
is_parallel_bus(struct v4l2_fwnode_endpoint * ep)125 static inline bool is_parallel_bus(struct v4l2_fwnode_endpoint *ep)
126 {
127 return ep->bus_type != V4L2_MBUS_CSI2;
128 }
129
is_parallel_16bit_bus(struct v4l2_fwnode_endpoint * ep)130 static inline bool is_parallel_16bit_bus(struct v4l2_fwnode_endpoint *ep)
131 {
132 return is_parallel_bus(ep) && ep->bus.parallel.bus_width >= 16;
133 }
134
135 /*
136 * Check for conditions that require the IPU to handle the
137 * data internally as generic data, aka passthrough mode:
138 * - raw bayer media bus formats, or
139 * - the CSI is receiving from a 16-bit parallel bus, or
140 * - the CSI is receiving from an 8-bit parallel bus and the incoming
141 * media bus format is other than UYVY8_2X8/YUYV8_2X8.
142 */
requires_passthrough(struct v4l2_fwnode_endpoint * ep,struct v4l2_mbus_framefmt * infmt,const struct imx_media_pixfmt * incc)143 static inline bool requires_passthrough(struct v4l2_fwnode_endpoint *ep,
144 struct v4l2_mbus_framefmt *infmt,
145 const struct imx_media_pixfmt *incc)
146 {
147 return incc->bayer || is_parallel_16bit_bus(ep) ||
148 (is_parallel_bus(ep) &&
149 infmt->code != MEDIA_BUS_FMT_UYVY8_2X8 &&
150 infmt->code != MEDIA_BUS_FMT_YUYV8_2X8);
151 }
152
153 /*
154 * Parses the fwnode endpoint from the source pad of the entity
155 * connected to this CSI. This will either be the entity directly
156 * upstream from the CSI-2 receiver, or directly upstream from the
157 * video mux. The endpoint is needed to determine the bus type and
158 * bus config coming into the CSI.
159 */
csi_get_upstream_endpoint(struct csi_priv * priv,struct v4l2_fwnode_endpoint * ep)160 static int csi_get_upstream_endpoint(struct csi_priv *priv,
161 struct v4l2_fwnode_endpoint *ep)
162 {
163 struct device_node *endpoint, *port;
164 struct media_entity *src;
165 struct v4l2_subdev *sd;
166 struct media_pad *pad;
167
168 if (!priv->src_sd)
169 return -EPIPE;
170
171 src = &priv->src_sd->entity;
172
173 if (src->function == MEDIA_ENT_F_VID_MUX) {
174 /*
175 * CSI is connected directly to video mux, skip up to
176 * CSI-2 receiver if it is in the path, otherwise stay
177 * with video mux.
178 */
179 sd = imx_media_find_upstream_subdev(priv->md, src,
180 IMX_MEDIA_GRP_ID_CSI2);
181 if (!IS_ERR(sd))
182 src = &sd->entity;
183 }
184
185 /* get source pad of entity directly upstream from src */
186 pad = imx_media_find_upstream_pad(priv->md, src, 0);
187 if (IS_ERR(pad))
188 return PTR_ERR(pad);
189
190 sd = media_entity_to_v4l2_subdev(pad->entity);
191
192 /*
193 * NOTE: this assumes an OF-graph port id is the same as a
194 * media pad index.
195 */
196 port = of_graph_get_port_by_id(sd->dev->of_node, pad->index);
197 if (!port)
198 return -ENODEV;
199
200 endpoint = of_get_next_child(port, NULL);
201 of_node_put(port);
202 if (!endpoint)
203 return -ENODEV;
204
205 v4l2_fwnode_endpoint_parse(of_fwnode_handle(endpoint), ep);
206 of_node_put(endpoint);
207
208 return 0;
209 }
210
csi_idmac_put_ipu_resources(struct csi_priv * priv)211 static void csi_idmac_put_ipu_resources(struct csi_priv *priv)
212 {
213 if (priv->idmac_ch)
214 ipu_idmac_put(priv->idmac_ch);
215 priv->idmac_ch = NULL;
216
217 if (priv->smfc)
218 ipu_smfc_put(priv->smfc);
219 priv->smfc = NULL;
220 }
221
csi_idmac_get_ipu_resources(struct csi_priv * priv)222 static int csi_idmac_get_ipu_resources(struct csi_priv *priv)
223 {
224 int ch_num, ret;
225 struct ipu_smfc *smfc;
226 struct ipuv3_channel *idmac_ch;
227
228 ch_num = IPUV3_CHANNEL_CSI0 + priv->smfc_id;
229
230 smfc = ipu_smfc_get(priv->ipu, ch_num);
231 if (IS_ERR(smfc)) {
232 v4l2_err(&priv->sd, "failed to get SMFC\n");
233 ret = PTR_ERR(smfc);
234 goto out;
235 }
236 priv->smfc = smfc;
237
238 idmac_ch = ipu_idmac_get(priv->ipu, ch_num);
239 if (IS_ERR(idmac_ch)) {
240 v4l2_err(&priv->sd, "could not get IDMAC channel %u\n",
241 ch_num);
242 ret = PTR_ERR(idmac_ch);
243 goto out;
244 }
245 priv->idmac_ch = idmac_ch;
246
247 return 0;
248 out:
249 csi_idmac_put_ipu_resources(priv);
250 return ret;
251 }
252
csi_vb2_buf_done(struct csi_priv * priv)253 static void csi_vb2_buf_done(struct csi_priv *priv)
254 {
255 struct imx_media_video_dev *vdev = priv->vdev;
256 struct imx_media_buffer *done, *next;
257 struct vb2_buffer *vb;
258 dma_addr_t phys;
259
260 done = priv->active_vb2_buf[priv->ipu_buf_num];
261 if (done) {
262 done->vbuf.field = vdev->fmt.fmt.pix.field;
263 done->vbuf.sequence = priv->frame_sequence;
264 vb = &done->vbuf.vb2_buf;
265 vb->timestamp = ktime_get_ns();
266 vb2_buffer_done(vb, priv->nfb4eof ?
267 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
268 }
269
270 priv->frame_sequence++;
271 priv->nfb4eof = false;
272
273 /* get next queued buffer */
274 next = imx_media_capture_device_next_buf(vdev);
275 if (next) {
276 phys = vb2_dma_contig_plane_dma_addr(&next->vbuf.vb2_buf, 0);
277 priv->active_vb2_buf[priv->ipu_buf_num] = next;
278 } else {
279 phys = priv->underrun_buf.phys;
280 priv->active_vb2_buf[priv->ipu_buf_num] = NULL;
281 }
282
283 if (ipu_idmac_buffer_is_ready(priv->idmac_ch, priv->ipu_buf_num))
284 ipu_idmac_clear_buffer(priv->idmac_ch, priv->ipu_buf_num);
285
286 ipu_cpmem_set_buffer(priv->idmac_ch, priv->ipu_buf_num, phys);
287 }
288
csi_idmac_eof_interrupt(int irq,void * dev_id)289 static irqreturn_t csi_idmac_eof_interrupt(int irq, void *dev_id)
290 {
291 struct csi_priv *priv = dev_id;
292
293 spin_lock(&priv->irqlock);
294
295 if (priv->last_eof) {
296 complete(&priv->last_eof_comp);
297 priv->last_eof = false;
298 goto unlock;
299 }
300
301 if (priv->fim)
302 /* call frame interval monitor */
303 imx_media_fim_eof_monitor(priv->fim, ktime_get());
304
305 csi_vb2_buf_done(priv);
306
307 /* select new IPU buf */
308 ipu_idmac_select_buffer(priv->idmac_ch, priv->ipu_buf_num);
309 /* toggle IPU double-buffer index */
310 priv->ipu_buf_num ^= 1;
311
312 /* bump the EOF timeout timer */
313 mod_timer(&priv->eof_timeout_timer,
314 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT));
315
316 unlock:
317 spin_unlock(&priv->irqlock);
318 return IRQ_HANDLED;
319 }
320
csi_idmac_nfb4eof_interrupt(int irq,void * dev_id)321 static irqreturn_t csi_idmac_nfb4eof_interrupt(int irq, void *dev_id)
322 {
323 struct csi_priv *priv = dev_id;
324
325 spin_lock(&priv->irqlock);
326
327 /*
328 * this is not an unrecoverable error, just mark
329 * the next captured frame with vb2 error flag.
330 */
331 priv->nfb4eof = true;
332
333 v4l2_err(&priv->sd, "NFB4EOF\n");
334
335 spin_unlock(&priv->irqlock);
336
337 return IRQ_HANDLED;
338 }
339
340 /*
341 * EOF timeout timer function. This is an unrecoverable condition
342 * without a stream restart.
343 */
csi_idmac_eof_timeout(struct timer_list * t)344 static void csi_idmac_eof_timeout(struct timer_list *t)
345 {
346 struct csi_priv *priv = from_timer(priv, t, eof_timeout_timer);
347 struct imx_media_video_dev *vdev = priv->vdev;
348
349 v4l2_err(&priv->sd, "EOF timeout\n");
350
351 /* signal a fatal error to capture device */
352 imx_media_capture_device_error(vdev);
353 }
354
csi_idmac_setup_vb2_buf(struct csi_priv * priv,dma_addr_t * phys)355 static void csi_idmac_setup_vb2_buf(struct csi_priv *priv, dma_addr_t *phys)
356 {
357 struct imx_media_video_dev *vdev = priv->vdev;
358 struct imx_media_buffer *buf;
359 int i;
360
361 for (i = 0; i < 2; i++) {
362 buf = imx_media_capture_device_next_buf(vdev);
363 if (buf) {
364 priv->active_vb2_buf[i] = buf;
365 phys[i] = vb2_dma_contig_plane_dma_addr(
366 &buf->vbuf.vb2_buf, 0);
367 } else {
368 priv->active_vb2_buf[i] = NULL;
369 phys[i] = priv->underrun_buf.phys;
370 }
371 }
372 }
373
csi_idmac_unsetup_vb2_buf(struct csi_priv * priv,enum vb2_buffer_state return_status)374 static void csi_idmac_unsetup_vb2_buf(struct csi_priv *priv,
375 enum vb2_buffer_state return_status)
376 {
377 struct imx_media_buffer *buf;
378 int i;
379
380 /* return any remaining active frames with return_status */
381 for (i = 0; i < 2; i++) {
382 buf = priv->active_vb2_buf[i];
383 if (buf) {
384 struct vb2_buffer *vb = &buf->vbuf.vb2_buf;
385
386 vb->timestamp = ktime_get_ns();
387 vb2_buffer_done(vb, return_status);
388 }
389 }
390 }
391
392 /* init the SMFC IDMAC channel */
csi_idmac_setup_channel(struct csi_priv * priv)393 static int csi_idmac_setup_channel(struct csi_priv *priv)
394 {
395 struct imx_media_video_dev *vdev = priv->vdev;
396 const struct imx_media_pixfmt *incc;
397 struct v4l2_mbus_framefmt *infmt;
398 struct ipu_image image;
399 u32 passthrough_bits;
400 u32 passthrough_cycles;
401 dma_addr_t phys[2];
402 bool passthrough;
403 u32 burst_size;
404 int ret;
405
406 infmt = &priv->format_mbus[CSI_SINK_PAD];
407 incc = priv->cc[CSI_SINK_PAD];
408
409 ipu_cpmem_zero(priv->idmac_ch);
410
411 memset(&image, 0, sizeof(image));
412 image.pix = vdev->fmt.fmt.pix;
413 image.rect.width = image.pix.width;
414 image.rect.height = image.pix.height;
415
416 csi_idmac_setup_vb2_buf(priv, phys);
417
418 image.phys0 = phys[0];
419 image.phys1 = phys[1];
420
421 passthrough = requires_passthrough(&priv->upstream_ep, infmt, incc);
422 passthrough_cycles = 1;
423
424 switch (image.pix.pixelformat) {
425 case V4L2_PIX_FMT_SBGGR8:
426 case V4L2_PIX_FMT_SGBRG8:
427 case V4L2_PIX_FMT_SGRBG8:
428 case V4L2_PIX_FMT_SRGGB8:
429 case V4L2_PIX_FMT_GREY:
430 burst_size = 16;
431 passthrough_bits = 8;
432 break;
433 case V4L2_PIX_FMT_SBGGR16:
434 case V4L2_PIX_FMT_SGBRG16:
435 case V4L2_PIX_FMT_SGRBG16:
436 case V4L2_PIX_FMT_SRGGB16:
437 case V4L2_PIX_FMT_Y16:
438 burst_size = 8;
439 passthrough_bits = 16;
440 break;
441 case V4L2_PIX_FMT_YUV420:
442 case V4L2_PIX_FMT_NV12:
443 burst_size = (image.pix.width & 0x3f) ?
444 ((image.pix.width & 0x1f) ?
445 ((image.pix.width & 0xf) ? 8 : 16) : 32) : 64;
446 passthrough_bits = 16;
447 /* Skip writing U and V components to odd rows */
448 ipu_cpmem_skip_odd_chroma_rows(priv->idmac_ch);
449 break;
450 case V4L2_PIX_FMT_YUYV:
451 case V4L2_PIX_FMT_UYVY:
452 burst_size = (image.pix.width & 0x1f) ?
453 ((image.pix.width & 0xf) ? 8 : 16) : 32;
454 passthrough_bits = 16;
455 break;
456 case V4L2_PIX_FMT_RGB565:
457 if (passthrough) {
458 burst_size = 16;
459 passthrough_bits = 8;
460 passthrough_cycles = incc->cycles;
461 break;
462 }
463 /* fallthrough - non-passthrough RGB565 (CSI-2 bus) */
464 default:
465 burst_size = (image.pix.width & 0xf) ? 8 : 16;
466 passthrough_bits = 16;
467 break;
468 }
469
470 if (passthrough) {
471 ipu_cpmem_set_resolution(priv->idmac_ch,
472 image.rect.width * passthrough_cycles,
473 image.rect.height);
474 ipu_cpmem_set_stride(priv->idmac_ch, image.pix.bytesperline);
475 ipu_cpmem_set_buffer(priv->idmac_ch, 0, image.phys0);
476 ipu_cpmem_set_buffer(priv->idmac_ch, 1, image.phys1);
477 ipu_cpmem_set_format_passthrough(priv->idmac_ch,
478 passthrough_bits);
479 } else {
480 ret = ipu_cpmem_set_image(priv->idmac_ch, &image);
481 if (ret)
482 goto unsetup_vb2;
483 }
484
485 ipu_cpmem_set_burstsize(priv->idmac_ch, burst_size);
486
487 /*
488 * Set the channel for the direct CSI-->memory via SMFC
489 * use-case to very high priority, by enabling the watermark
490 * signal in the SMFC, enabling WM in the channel, and setting
491 * the channel priority to high.
492 *
493 * Refer to the i.mx6 rev. D TRM Table 36-8: Calculated priority
494 * value.
495 *
496 * The WM's are set very low by intention here to ensure that
497 * the SMFC FIFOs do not overflow.
498 */
499 ipu_smfc_set_watermark(priv->smfc, 0x02, 0x01);
500 ipu_cpmem_set_high_priority(priv->idmac_ch);
501 ipu_idmac_enable_watermark(priv->idmac_ch, true);
502 ipu_cpmem_set_axi_id(priv->idmac_ch, 0);
503
504 burst_size = passthrough ?
505 (burst_size >> 3) - 1 : (burst_size >> 2) - 1;
506
507 ipu_smfc_set_burstsize(priv->smfc, burst_size);
508
509 if (image.pix.field == V4L2_FIELD_NONE &&
510 V4L2_FIELD_HAS_BOTH(infmt->field))
511 ipu_cpmem_interlaced_scan(priv->idmac_ch,
512 image.pix.bytesperline);
513
514 ipu_idmac_set_double_buffer(priv->idmac_ch, true);
515
516 return 0;
517
518 unsetup_vb2:
519 csi_idmac_unsetup_vb2_buf(priv, VB2_BUF_STATE_QUEUED);
520 return ret;
521 }
522
csi_idmac_unsetup(struct csi_priv * priv,enum vb2_buffer_state state)523 static void csi_idmac_unsetup(struct csi_priv *priv,
524 enum vb2_buffer_state state)
525 {
526 ipu_idmac_disable_channel(priv->idmac_ch);
527 ipu_smfc_disable(priv->smfc);
528
529 csi_idmac_unsetup_vb2_buf(priv, state);
530 }
531
csi_idmac_setup(struct csi_priv * priv)532 static int csi_idmac_setup(struct csi_priv *priv)
533 {
534 int ret;
535
536 ret = csi_idmac_setup_channel(priv);
537 if (ret)
538 return ret;
539
540 ipu_cpmem_dump(priv->idmac_ch);
541 ipu_dump(priv->ipu);
542
543 ipu_smfc_enable(priv->smfc);
544
545 /* set buffers ready */
546 ipu_idmac_select_buffer(priv->idmac_ch, 0);
547 ipu_idmac_select_buffer(priv->idmac_ch, 1);
548
549 /* enable the channels */
550 ipu_idmac_enable_channel(priv->idmac_ch);
551
552 return 0;
553 }
554
csi_idmac_start(struct csi_priv * priv)555 static int csi_idmac_start(struct csi_priv *priv)
556 {
557 struct imx_media_video_dev *vdev = priv->vdev;
558 struct v4l2_pix_format *outfmt;
559 int ret;
560
561 ret = csi_idmac_get_ipu_resources(priv);
562 if (ret)
563 return ret;
564
565 ipu_smfc_map_channel(priv->smfc, priv->csi_id, priv->vc_num);
566
567 outfmt = &vdev->fmt.fmt.pix;
568
569 ret = imx_media_alloc_dma_buf(priv->md, &priv->underrun_buf,
570 outfmt->sizeimage);
571 if (ret)
572 goto out_put_ipu;
573
574 priv->ipu_buf_num = 0;
575
576 /* init EOF completion waitq */
577 init_completion(&priv->last_eof_comp);
578 priv->frame_sequence = 0;
579 priv->last_eof = false;
580 priv->nfb4eof = false;
581
582 ret = csi_idmac_setup(priv);
583 if (ret) {
584 v4l2_err(&priv->sd, "csi_idmac_setup failed: %d\n", ret);
585 goto out_free_dma_buf;
586 }
587
588 priv->nfb4eof_irq = ipu_idmac_channel_irq(priv->ipu,
589 priv->idmac_ch,
590 IPU_IRQ_NFB4EOF);
591 ret = devm_request_irq(priv->dev, priv->nfb4eof_irq,
592 csi_idmac_nfb4eof_interrupt, 0,
593 "imx-smfc-nfb4eof", priv);
594 if (ret) {
595 v4l2_err(&priv->sd,
596 "Error registering NFB4EOF irq: %d\n", ret);
597 goto out_unsetup;
598 }
599
600 priv->eof_irq = ipu_idmac_channel_irq(priv->ipu, priv->idmac_ch,
601 IPU_IRQ_EOF);
602
603 ret = devm_request_irq(priv->dev, priv->eof_irq,
604 csi_idmac_eof_interrupt, 0,
605 "imx-smfc-eof", priv);
606 if (ret) {
607 v4l2_err(&priv->sd,
608 "Error registering eof irq: %d\n", ret);
609 goto out_free_nfb4eof_irq;
610 }
611
612 /* start the EOF timeout timer */
613 mod_timer(&priv->eof_timeout_timer,
614 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT));
615
616 return 0;
617
618 out_free_nfb4eof_irq:
619 devm_free_irq(priv->dev, priv->nfb4eof_irq, priv);
620 out_unsetup:
621 csi_idmac_unsetup(priv, VB2_BUF_STATE_QUEUED);
622 out_free_dma_buf:
623 imx_media_free_dma_buf(priv->md, &priv->underrun_buf);
624 out_put_ipu:
625 csi_idmac_put_ipu_resources(priv);
626 return ret;
627 }
628
csi_idmac_stop(struct csi_priv * priv)629 static void csi_idmac_stop(struct csi_priv *priv)
630 {
631 unsigned long flags;
632 int ret;
633
634 /* mark next EOF interrupt as the last before stream off */
635 spin_lock_irqsave(&priv->irqlock, flags);
636 priv->last_eof = true;
637 spin_unlock_irqrestore(&priv->irqlock, flags);
638
639 /*
640 * and then wait for interrupt handler to mark completion.
641 */
642 ret = wait_for_completion_timeout(
643 &priv->last_eof_comp, msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT));
644 if (ret == 0)
645 v4l2_warn(&priv->sd, "wait last EOF timeout\n");
646
647 devm_free_irq(priv->dev, priv->eof_irq, priv);
648 devm_free_irq(priv->dev, priv->nfb4eof_irq, priv);
649
650 csi_idmac_unsetup(priv, VB2_BUF_STATE_ERROR);
651
652 imx_media_free_dma_buf(priv->md, &priv->underrun_buf);
653
654 /* cancel the EOF timeout timer */
655 del_timer_sync(&priv->eof_timeout_timer);
656
657 csi_idmac_put_ipu_resources(priv);
658 }
659
660 /* Update the CSI whole sensor and active windows */
csi_setup(struct csi_priv * priv)661 static int csi_setup(struct csi_priv *priv)
662 {
663 struct v4l2_mbus_framefmt *infmt, *outfmt;
664 const struct imx_media_pixfmt *incc;
665 struct v4l2_mbus_config mbus_cfg;
666 struct v4l2_mbus_framefmt if_fmt;
667 struct v4l2_rect crop;
668
669 infmt = &priv->format_mbus[CSI_SINK_PAD];
670 incc = priv->cc[CSI_SINK_PAD];
671 outfmt = &priv->format_mbus[priv->active_output_pad];
672
673 /* compose mbus_config from the upstream endpoint */
674 mbus_cfg.type = priv->upstream_ep.bus_type;
675 mbus_cfg.flags = is_parallel_bus(&priv->upstream_ep) ?
676 priv->upstream_ep.bus.parallel.flags :
677 priv->upstream_ep.bus.mipi_csi2.flags;
678
679 /*
680 * we need to pass input frame to CSI interface, but
681 * with translated field type from output format
682 */
683 if_fmt = *infmt;
684 if_fmt.field = outfmt->field;
685 crop = priv->crop;
686
687 /*
688 * if cycles is set, we need to handle this over multiple cycles as
689 * generic/bayer data
690 */
691 if (is_parallel_bus(&priv->upstream_ep) && incc->cycles) {
692 if_fmt.width *= incc->cycles;
693 crop.width *= incc->cycles;
694 }
695
696 ipu_csi_set_window(priv->csi, &crop);
697
698 ipu_csi_set_downsize(priv->csi,
699 priv->crop.width == 2 * priv->compose.width,
700 priv->crop.height == 2 * priv->compose.height);
701
702 ipu_csi_init_interface(priv->csi, &mbus_cfg, &if_fmt);
703
704 ipu_csi_set_dest(priv->csi, priv->dest);
705
706 if (priv->dest == IPU_CSI_DEST_IDMAC)
707 ipu_csi_set_skip_smfc(priv->csi, priv->skip->skip_smfc,
708 priv->skip->max_ratio - 1, 0);
709
710 ipu_csi_dump(priv->csi);
711
712 return 0;
713 }
714
csi_start(struct csi_priv * priv)715 static int csi_start(struct csi_priv *priv)
716 {
717 struct v4l2_fract *output_fi;
718 int ret;
719
720 output_fi = &priv->frame_interval[priv->active_output_pad];
721
722 if (priv->dest == IPU_CSI_DEST_IDMAC) {
723 ret = csi_idmac_start(priv);
724 if (ret)
725 return ret;
726 }
727
728 ret = csi_setup(priv);
729 if (ret)
730 goto idmac_stop;
731
732 /* start the frame interval monitor */
733 if (priv->fim && priv->dest == IPU_CSI_DEST_IDMAC) {
734 ret = imx_media_fim_set_stream(priv->fim, output_fi, true);
735 if (ret)
736 goto idmac_stop;
737 }
738
739 ret = ipu_csi_enable(priv->csi);
740 if (ret) {
741 v4l2_err(&priv->sd, "CSI enable error: %d\n", ret);
742 goto fim_off;
743 }
744
745 return 0;
746
747 fim_off:
748 if (priv->fim && priv->dest == IPU_CSI_DEST_IDMAC)
749 imx_media_fim_set_stream(priv->fim, NULL, false);
750 idmac_stop:
751 if (priv->dest == IPU_CSI_DEST_IDMAC)
752 csi_idmac_stop(priv);
753 return ret;
754 }
755
csi_stop(struct csi_priv * priv)756 static void csi_stop(struct csi_priv *priv)
757 {
758 if (priv->dest == IPU_CSI_DEST_IDMAC) {
759 csi_idmac_stop(priv);
760
761 /* stop the frame interval monitor */
762 if (priv->fim)
763 imx_media_fim_set_stream(priv->fim, NULL, false);
764 }
765
766 ipu_csi_disable(priv->csi);
767 }
768
769 static const struct csi_skip_desc csi_skip[12] = {
770 { 1, 1, 0x00 }, /* Keep all frames */
771 { 5, 6, 0x10 }, /* Skip every sixth frame */
772 { 4, 5, 0x08 }, /* Skip every fifth frame */
773 { 3, 4, 0x04 }, /* Skip every fourth frame */
774 { 2, 3, 0x02 }, /* Skip every third frame */
775 { 3, 5, 0x0a }, /* Skip frames 1 and 3 of every 5 */
776 { 1, 2, 0x01 }, /* Skip every second frame */
777 { 2, 5, 0x0b }, /* Keep frames 1 and 4 of every 5 */
778 { 1, 3, 0x03 }, /* Keep one in three frames */
779 { 1, 4, 0x07 }, /* Keep one in four frames */
780 { 1, 5, 0x0f }, /* Keep one in five frames */
781 { 1, 6, 0x1f }, /* Keep one in six frames */
782 };
783
csi_apply_skip_interval(const struct csi_skip_desc * skip,struct v4l2_fract * interval)784 static void csi_apply_skip_interval(const struct csi_skip_desc *skip,
785 struct v4l2_fract *interval)
786 {
787 unsigned int div;
788
789 interval->numerator *= skip->max_ratio;
790 interval->denominator *= skip->keep;
791
792 /* Reduce fraction to lowest terms */
793 div = gcd(interval->numerator, interval->denominator);
794 if (div > 1) {
795 interval->numerator /= div;
796 interval->denominator /= div;
797 }
798 }
799
800 /*
801 * Find the skip pattern to produce the output frame interval closest to the
802 * requested one, for the given input frame interval. Updates the output frame
803 * interval to the exact value.
804 */
csi_find_best_skip(struct v4l2_fract * in,struct v4l2_fract * out)805 static const struct csi_skip_desc *csi_find_best_skip(struct v4l2_fract *in,
806 struct v4l2_fract *out)
807 {
808 const struct csi_skip_desc *skip = &csi_skip[0], *best_skip = skip;
809 u32 min_err = UINT_MAX;
810 u64 want_us;
811 int i;
812
813 /* Default to 1:1 ratio */
814 if (out->numerator == 0 || out->denominator == 0 ||
815 in->numerator == 0 || in->denominator == 0) {
816 *out = *in;
817 return best_skip;
818 }
819
820 want_us = div_u64((u64)USEC_PER_SEC * out->numerator, out->denominator);
821
822 /* Find the reduction closest to the requested time per frame */
823 for (i = 0; i < ARRAY_SIZE(csi_skip); i++, skip++) {
824 u64 tmp, err;
825
826 tmp = div_u64((u64)USEC_PER_SEC * in->numerator *
827 skip->max_ratio, in->denominator * skip->keep);
828
829 err = abs((s64)tmp - want_us);
830 if (err < min_err) {
831 min_err = err;
832 best_skip = skip;
833 }
834 }
835
836 *out = *in;
837 csi_apply_skip_interval(best_skip, out);
838
839 return best_skip;
840 }
841
842 /*
843 * V4L2 subdev operations.
844 */
845
csi_g_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * fi)846 static int csi_g_frame_interval(struct v4l2_subdev *sd,
847 struct v4l2_subdev_frame_interval *fi)
848 {
849 struct csi_priv *priv = v4l2_get_subdevdata(sd);
850
851 if (fi->pad >= CSI_NUM_PADS)
852 return -EINVAL;
853
854 mutex_lock(&priv->lock);
855
856 fi->interval = priv->frame_interval[fi->pad];
857
858 mutex_unlock(&priv->lock);
859
860 return 0;
861 }
862
csi_s_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * fi)863 static int csi_s_frame_interval(struct v4l2_subdev *sd,
864 struct v4l2_subdev_frame_interval *fi)
865 {
866 struct csi_priv *priv = v4l2_get_subdevdata(sd);
867 struct v4l2_fract *input_fi;
868 int ret = 0;
869
870 mutex_lock(&priv->lock);
871
872 input_fi = &priv->frame_interval[CSI_SINK_PAD];
873
874 switch (fi->pad) {
875 case CSI_SINK_PAD:
876 /* No limits on input frame interval */
877 /* Reset output intervals and frame skipping ratio to 1:1 */
878 priv->frame_interval[CSI_SRC_PAD_IDMAC] = fi->interval;
879 priv->frame_interval[CSI_SRC_PAD_DIRECT] = fi->interval;
880 priv->skip = &csi_skip[0];
881 break;
882 case CSI_SRC_PAD_IDMAC:
883 /*
884 * frame interval at IDMAC output pad depends on input
885 * interval, modified by frame skipping.
886 */
887 priv->skip = csi_find_best_skip(input_fi, &fi->interval);
888 break;
889 case CSI_SRC_PAD_DIRECT:
890 /*
891 * frame interval at DIRECT output pad is same as input
892 * interval.
893 */
894 fi->interval = *input_fi;
895 break;
896 default:
897 ret = -EINVAL;
898 goto out;
899 }
900
901 priv->frame_interval[fi->pad] = fi->interval;
902 out:
903 mutex_unlock(&priv->lock);
904 return ret;
905 }
906
csi_s_stream(struct v4l2_subdev * sd,int enable)907 static int csi_s_stream(struct v4l2_subdev *sd, int enable)
908 {
909 struct csi_priv *priv = v4l2_get_subdevdata(sd);
910 int ret = 0;
911
912 mutex_lock(&priv->lock);
913
914 if (!priv->src_sd || !priv->sink) {
915 ret = -EPIPE;
916 goto out;
917 }
918
919 /*
920 * enable/disable streaming only if stream_count is
921 * going from 0 to 1 / 1 to 0.
922 */
923 if (priv->stream_count != !enable)
924 goto update_count;
925
926 if (enable) {
927 /* upstream must be started first, before starting CSI */
928 ret = v4l2_subdev_call(priv->src_sd, video, s_stream, 1);
929 ret = (ret && ret != -ENOIOCTLCMD) ? ret : 0;
930 if (ret)
931 goto out;
932
933 dev_dbg(priv->dev, "stream ON\n");
934 ret = csi_start(priv);
935 if (ret) {
936 v4l2_subdev_call(priv->src_sd, video, s_stream, 0);
937 goto out;
938 }
939 } else {
940 dev_dbg(priv->dev, "stream OFF\n");
941 /* CSI must be stopped first, then stop upstream */
942 csi_stop(priv);
943 v4l2_subdev_call(priv->src_sd, video, s_stream, 0);
944 }
945
946 update_count:
947 priv->stream_count += enable ? 1 : -1;
948 if (priv->stream_count < 0)
949 priv->stream_count = 0;
950 out:
951 mutex_unlock(&priv->lock);
952 return ret;
953 }
954
csi_link_setup(struct media_entity * entity,const struct media_pad * local,const struct media_pad * remote,u32 flags)955 static int csi_link_setup(struct media_entity *entity,
956 const struct media_pad *local,
957 const struct media_pad *remote, u32 flags)
958 {
959 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
960 struct csi_priv *priv = v4l2_get_subdevdata(sd);
961 struct v4l2_subdev *remote_sd;
962 int ret = 0;
963
964 dev_dbg(priv->dev, "link setup %s -> %s\n", remote->entity->name,
965 local->entity->name);
966
967 mutex_lock(&priv->lock);
968
969 if (local->flags & MEDIA_PAD_FL_SINK) {
970 if (!is_media_entity_v4l2_subdev(remote->entity)) {
971 ret = -EINVAL;
972 goto out;
973 }
974
975 remote_sd = media_entity_to_v4l2_subdev(remote->entity);
976
977 if (flags & MEDIA_LNK_FL_ENABLED) {
978 if (priv->src_sd) {
979 ret = -EBUSY;
980 goto out;
981 }
982 priv->src_sd = remote_sd;
983 } else {
984 priv->src_sd = NULL;
985 }
986
987 goto out;
988 }
989
990 /* this is a source pad */
991
992 if (flags & MEDIA_LNK_FL_ENABLED) {
993 if (priv->sink) {
994 ret = -EBUSY;
995 goto out;
996 }
997 } else {
998 v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
999 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0);
1000 priv->sink = NULL;
1001 goto out;
1002 }
1003
1004 /* record which output pad is now active */
1005 priv->active_output_pad = local->index;
1006
1007 /* set CSI destination */
1008 if (local->index == CSI_SRC_PAD_IDMAC) {
1009 if (!is_media_entity_v4l2_video_device(remote->entity)) {
1010 ret = -EINVAL;
1011 goto out;
1012 }
1013
1014 if (priv->fim) {
1015 ret = imx_media_fim_add_controls(priv->fim);
1016 if (ret)
1017 goto out;
1018 }
1019
1020 priv->dest = IPU_CSI_DEST_IDMAC;
1021 } else {
1022 if (!is_media_entity_v4l2_subdev(remote->entity)) {
1023 ret = -EINVAL;
1024 goto out;
1025 }
1026
1027 remote_sd = media_entity_to_v4l2_subdev(remote->entity);
1028 switch (remote_sd->grp_id) {
1029 case IMX_MEDIA_GRP_ID_VDIC:
1030 priv->dest = IPU_CSI_DEST_VDIC;
1031 break;
1032 case IMX_MEDIA_GRP_ID_IC_PRP:
1033 priv->dest = IPU_CSI_DEST_IC;
1034 break;
1035 default:
1036 ret = -EINVAL;
1037 goto out;
1038 }
1039 }
1040
1041 priv->sink = remote->entity;
1042 out:
1043 mutex_unlock(&priv->lock);
1044 return ret;
1045 }
1046
csi_link_validate(struct v4l2_subdev * sd,struct media_link * link,struct v4l2_subdev_format * source_fmt,struct v4l2_subdev_format * sink_fmt)1047 static int csi_link_validate(struct v4l2_subdev *sd,
1048 struct media_link *link,
1049 struct v4l2_subdev_format *source_fmt,
1050 struct v4l2_subdev_format *sink_fmt)
1051 {
1052 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1053 struct v4l2_fwnode_endpoint upstream_ep = {};
1054 bool is_csi2;
1055 int ret;
1056
1057 ret = v4l2_subdev_link_validate_default(sd, link,
1058 source_fmt, sink_fmt);
1059 if (ret)
1060 return ret;
1061
1062 ret = csi_get_upstream_endpoint(priv, &upstream_ep);
1063 if (ret) {
1064 v4l2_err(&priv->sd, "failed to find upstream endpoint\n");
1065 return ret;
1066 }
1067
1068 mutex_lock(&priv->lock);
1069
1070 priv->upstream_ep = upstream_ep;
1071 is_csi2 = !is_parallel_bus(&upstream_ep);
1072 if (is_csi2) {
1073 int vc_num = 0;
1074 /*
1075 * NOTE! It seems the virtual channels from the mipi csi-2
1076 * receiver are used only for routing by the video mux's,
1077 * or for hard-wired routing to the CSI's. Once the stream
1078 * enters the CSI's however, they are treated internally
1079 * in the IPU as virtual channel 0.
1080 */
1081 #if 0
1082 mutex_unlock(&priv->lock);
1083 vc_num = imx_media_find_mipi_csi2_channel(priv->md,
1084 &priv->sd.entity);
1085 if (vc_num < 0)
1086 return vc_num;
1087 mutex_lock(&priv->lock);
1088 #endif
1089 ipu_csi_set_mipi_datatype(priv->csi, vc_num,
1090 &priv->format_mbus[CSI_SINK_PAD]);
1091 }
1092
1093 /* select either parallel or MIPI-CSI2 as input to CSI */
1094 ipu_set_csi_src_mux(priv->ipu, priv->csi_id, is_csi2);
1095
1096 mutex_unlock(&priv->lock);
1097 return ret;
1098 }
1099
1100 static struct v4l2_mbus_framefmt *
__csi_get_fmt(struct csi_priv * priv,struct v4l2_subdev_pad_config * cfg,unsigned int pad,enum v4l2_subdev_format_whence which)1101 __csi_get_fmt(struct csi_priv *priv, struct v4l2_subdev_pad_config *cfg,
1102 unsigned int pad, enum v4l2_subdev_format_whence which)
1103 {
1104 if (which == V4L2_SUBDEV_FORMAT_TRY)
1105 return v4l2_subdev_get_try_format(&priv->sd, cfg, pad);
1106 else
1107 return &priv->format_mbus[pad];
1108 }
1109
1110 static struct v4l2_rect *
__csi_get_crop(struct csi_priv * priv,struct v4l2_subdev_pad_config * cfg,enum v4l2_subdev_format_whence which)1111 __csi_get_crop(struct csi_priv *priv, struct v4l2_subdev_pad_config *cfg,
1112 enum v4l2_subdev_format_whence which)
1113 {
1114 if (which == V4L2_SUBDEV_FORMAT_TRY)
1115 return v4l2_subdev_get_try_crop(&priv->sd, cfg, CSI_SINK_PAD);
1116 else
1117 return &priv->crop;
1118 }
1119
1120 static struct v4l2_rect *
__csi_get_compose(struct csi_priv * priv,struct v4l2_subdev_pad_config * cfg,enum v4l2_subdev_format_whence which)1121 __csi_get_compose(struct csi_priv *priv, struct v4l2_subdev_pad_config *cfg,
1122 enum v4l2_subdev_format_whence which)
1123 {
1124 if (which == V4L2_SUBDEV_FORMAT_TRY)
1125 return v4l2_subdev_get_try_compose(&priv->sd, cfg,
1126 CSI_SINK_PAD);
1127 else
1128 return &priv->compose;
1129 }
1130
csi_try_crop(struct csi_priv * priv,struct v4l2_rect * crop,struct v4l2_subdev_pad_config * cfg,struct v4l2_mbus_framefmt * infmt,struct v4l2_fwnode_endpoint * upstream_ep)1131 static void csi_try_crop(struct csi_priv *priv,
1132 struct v4l2_rect *crop,
1133 struct v4l2_subdev_pad_config *cfg,
1134 struct v4l2_mbus_framefmt *infmt,
1135 struct v4l2_fwnode_endpoint *upstream_ep)
1136 {
1137 crop->width = min_t(__u32, infmt->width, crop->width);
1138 if (crop->left + crop->width > infmt->width)
1139 crop->left = infmt->width - crop->width;
1140 /* adjust crop left/width to h/w alignment restrictions */
1141 crop->left &= ~0x3;
1142 crop->width &= ~0x7;
1143
1144 /*
1145 * FIXME: not sure why yet, but on interlaced bt.656,
1146 * changing the vertical cropping causes loss of vertical
1147 * sync, so fix it to NTSC/PAL active lines. NTSC contains
1148 * 2 extra lines of active video that need to be cropped.
1149 */
1150 if (upstream_ep->bus_type == V4L2_MBUS_BT656 &&
1151 (V4L2_FIELD_HAS_BOTH(infmt->field) ||
1152 infmt->field == V4L2_FIELD_ALTERNATE)) {
1153 crop->height = infmt->height;
1154 crop->top = (infmt->height == 480) ? 2 : 0;
1155 } else {
1156 crop->height = min_t(__u32, infmt->height, crop->height);
1157 if (crop->top + crop->height > infmt->height)
1158 crop->top = infmt->height - crop->height;
1159 }
1160 }
1161
csi_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_mbus_code_enum * code)1162 static int csi_enum_mbus_code(struct v4l2_subdev *sd,
1163 struct v4l2_subdev_pad_config *cfg,
1164 struct v4l2_subdev_mbus_code_enum *code)
1165 {
1166 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1167 struct v4l2_fwnode_endpoint upstream_ep;
1168 const struct imx_media_pixfmt *incc;
1169 struct v4l2_mbus_framefmt *infmt;
1170 int ret = 0;
1171
1172 mutex_lock(&priv->lock);
1173
1174 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, code->which);
1175 incc = imx_media_find_mbus_format(infmt->code, CS_SEL_ANY, true);
1176
1177 switch (code->pad) {
1178 case CSI_SINK_PAD:
1179 ret = imx_media_enum_mbus_format(&code->code, code->index,
1180 CS_SEL_ANY, true);
1181 break;
1182 case CSI_SRC_PAD_DIRECT:
1183 case CSI_SRC_PAD_IDMAC:
1184 ret = csi_get_upstream_endpoint(priv, &upstream_ep);
1185 if (ret) {
1186 v4l2_err(&priv->sd, "failed to find upstream endpoint\n");
1187 goto out;
1188 }
1189
1190 if (requires_passthrough(&upstream_ep, infmt, incc)) {
1191 if (code->index != 0) {
1192 ret = -EINVAL;
1193 goto out;
1194 }
1195 code->code = infmt->code;
1196 } else {
1197 u32 cs_sel = (incc->cs == IPUV3_COLORSPACE_YUV) ?
1198 CS_SEL_YUV : CS_SEL_RGB;
1199 ret = imx_media_enum_ipu_format(&code->code,
1200 code->index,
1201 cs_sel);
1202 }
1203 break;
1204 default:
1205 ret = -EINVAL;
1206 }
1207
1208 out:
1209 mutex_unlock(&priv->lock);
1210 return ret;
1211 }
1212
csi_enum_frame_size(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_frame_size_enum * fse)1213 static int csi_enum_frame_size(struct v4l2_subdev *sd,
1214 struct v4l2_subdev_pad_config *cfg,
1215 struct v4l2_subdev_frame_size_enum *fse)
1216 {
1217 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1218 struct v4l2_rect *crop;
1219 int ret = 0;
1220
1221 if (fse->pad >= CSI_NUM_PADS ||
1222 fse->index > (fse->pad == CSI_SINK_PAD ? 0 : 3))
1223 return -EINVAL;
1224
1225 mutex_lock(&priv->lock);
1226
1227 if (fse->pad == CSI_SINK_PAD) {
1228 fse->min_width = MIN_W;
1229 fse->max_width = MAX_W;
1230 fse->min_height = MIN_H;
1231 fse->max_height = MAX_H;
1232 } else {
1233 crop = __csi_get_crop(priv, cfg, fse->which);
1234
1235 fse->min_width = fse->index & 1 ?
1236 crop->width / 2 : crop->width;
1237 fse->max_width = fse->min_width;
1238 fse->min_height = fse->index & 2 ?
1239 crop->height / 2 : crop->height;
1240 fse->max_height = fse->min_height;
1241 }
1242
1243 mutex_unlock(&priv->lock);
1244 return ret;
1245 }
1246
csi_enum_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_frame_interval_enum * fie)1247 static int csi_enum_frame_interval(struct v4l2_subdev *sd,
1248 struct v4l2_subdev_pad_config *cfg,
1249 struct v4l2_subdev_frame_interval_enum *fie)
1250 {
1251 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1252 struct v4l2_fract *input_fi;
1253 struct v4l2_rect *crop;
1254 int ret = 0;
1255
1256 if (fie->pad >= CSI_NUM_PADS ||
1257 fie->index >= (fie->pad != CSI_SRC_PAD_IDMAC ?
1258 1 : ARRAY_SIZE(csi_skip)))
1259 return -EINVAL;
1260
1261 mutex_lock(&priv->lock);
1262
1263 input_fi = &priv->frame_interval[CSI_SINK_PAD];
1264 crop = __csi_get_crop(priv, cfg, fie->which);
1265
1266 if ((fie->width != crop->width && fie->width != crop->width / 2) ||
1267 (fie->height != crop->height && fie->height != crop->height / 2)) {
1268 ret = -EINVAL;
1269 goto out;
1270 }
1271
1272 fie->interval = *input_fi;
1273
1274 if (fie->pad == CSI_SRC_PAD_IDMAC)
1275 csi_apply_skip_interval(&csi_skip[fie->index],
1276 &fie->interval);
1277
1278 out:
1279 mutex_unlock(&priv->lock);
1280 return ret;
1281 }
1282
csi_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * sdformat)1283 static int csi_get_fmt(struct v4l2_subdev *sd,
1284 struct v4l2_subdev_pad_config *cfg,
1285 struct v4l2_subdev_format *sdformat)
1286 {
1287 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1288 struct v4l2_mbus_framefmt *fmt;
1289 int ret = 0;
1290
1291 if (sdformat->pad >= CSI_NUM_PADS)
1292 return -EINVAL;
1293
1294 mutex_lock(&priv->lock);
1295
1296 fmt = __csi_get_fmt(priv, cfg, sdformat->pad, sdformat->which);
1297 if (!fmt) {
1298 ret = -EINVAL;
1299 goto out;
1300 }
1301
1302 sdformat->format = *fmt;
1303 out:
1304 mutex_unlock(&priv->lock);
1305 return ret;
1306 }
1307
csi_try_fmt(struct csi_priv * priv,struct v4l2_fwnode_endpoint * upstream_ep,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * sdformat,struct v4l2_rect * crop,struct v4l2_rect * compose,const struct imx_media_pixfmt ** cc)1308 static void csi_try_fmt(struct csi_priv *priv,
1309 struct v4l2_fwnode_endpoint *upstream_ep,
1310 struct v4l2_subdev_pad_config *cfg,
1311 struct v4l2_subdev_format *sdformat,
1312 struct v4l2_rect *crop,
1313 struct v4l2_rect *compose,
1314 const struct imx_media_pixfmt **cc)
1315 {
1316 const struct imx_media_pixfmt *incc;
1317 struct v4l2_mbus_framefmt *infmt;
1318 u32 code;
1319
1320 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, sdformat->which);
1321
1322 switch (sdformat->pad) {
1323 case CSI_SRC_PAD_DIRECT:
1324 case CSI_SRC_PAD_IDMAC:
1325 incc = imx_media_find_mbus_format(infmt->code,
1326 CS_SEL_ANY, true);
1327
1328 sdformat->format.width = compose->width;
1329 sdformat->format.height = compose->height;
1330
1331 if (requires_passthrough(upstream_ep, infmt, incc)) {
1332 sdformat->format.code = infmt->code;
1333 *cc = incc;
1334 } else {
1335 u32 cs_sel = (incc->cs == IPUV3_COLORSPACE_YUV) ?
1336 CS_SEL_YUV : CS_SEL_RGB;
1337
1338 *cc = imx_media_find_ipu_format(sdformat->format.code,
1339 cs_sel);
1340 if (!*cc) {
1341 imx_media_enum_ipu_format(&code, 0, cs_sel);
1342 *cc = imx_media_find_ipu_format(code, cs_sel);
1343 sdformat->format.code = (*cc)->codes[0];
1344 }
1345 }
1346
1347 if (sdformat->pad == CSI_SRC_PAD_DIRECT ||
1348 sdformat->format.field != V4L2_FIELD_NONE)
1349 sdformat->format.field = infmt->field;
1350
1351 /*
1352 * translate V4L2_FIELD_ALTERNATE to SEQ_TB or SEQ_BT
1353 * depending on input height (assume NTSC top-bottom
1354 * order if 480 lines, otherwise PAL bottom-top order).
1355 */
1356 if (sdformat->format.field == V4L2_FIELD_ALTERNATE) {
1357 sdformat->format.field = (infmt->height == 480) ?
1358 V4L2_FIELD_SEQ_TB : V4L2_FIELD_SEQ_BT;
1359 }
1360
1361 /* propagate colorimetry from sink */
1362 sdformat->format.colorspace = infmt->colorspace;
1363 sdformat->format.xfer_func = infmt->xfer_func;
1364 sdformat->format.quantization = infmt->quantization;
1365 sdformat->format.ycbcr_enc = infmt->ycbcr_enc;
1366 break;
1367 case CSI_SINK_PAD:
1368 v4l_bound_align_image(&sdformat->format.width, MIN_W, MAX_W,
1369 W_ALIGN, &sdformat->format.height,
1370 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
1371
1372 /* Reset crop and compose rectangles */
1373 crop->left = 0;
1374 crop->top = 0;
1375 crop->width = sdformat->format.width;
1376 crop->height = sdformat->format.height;
1377 csi_try_crop(priv, crop, cfg, &sdformat->format, upstream_ep);
1378 compose->left = 0;
1379 compose->top = 0;
1380 compose->width = crop->width;
1381 compose->height = crop->height;
1382
1383 *cc = imx_media_find_mbus_format(sdformat->format.code,
1384 CS_SEL_ANY, true);
1385 if (!*cc) {
1386 imx_media_enum_mbus_format(&code, 0,
1387 CS_SEL_ANY, false);
1388 *cc = imx_media_find_mbus_format(code,
1389 CS_SEL_ANY, false);
1390 sdformat->format.code = (*cc)->codes[0];
1391 }
1392
1393 imx_media_fill_default_mbus_fields(
1394 &sdformat->format, infmt,
1395 priv->active_output_pad == CSI_SRC_PAD_DIRECT);
1396 break;
1397 }
1398 }
1399
csi_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * sdformat)1400 static int csi_set_fmt(struct v4l2_subdev *sd,
1401 struct v4l2_subdev_pad_config *cfg,
1402 struct v4l2_subdev_format *sdformat)
1403 {
1404 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1405 struct imx_media_video_dev *vdev = priv->vdev;
1406 struct v4l2_fwnode_endpoint upstream_ep;
1407 const struct imx_media_pixfmt *cc;
1408 struct v4l2_pix_format vdev_fmt;
1409 struct v4l2_mbus_framefmt *fmt;
1410 struct v4l2_rect *crop, *compose;
1411 int ret;
1412
1413 if (sdformat->pad >= CSI_NUM_PADS)
1414 return -EINVAL;
1415
1416 ret = csi_get_upstream_endpoint(priv, &upstream_ep);
1417 if (ret) {
1418 v4l2_err(&priv->sd, "failed to find upstream endpoint\n");
1419 return ret;
1420 }
1421
1422 mutex_lock(&priv->lock);
1423
1424 if (priv->stream_count > 0) {
1425 ret = -EBUSY;
1426 goto out;
1427 }
1428
1429 crop = __csi_get_crop(priv, cfg, sdformat->which);
1430 compose = __csi_get_compose(priv, cfg, sdformat->which);
1431
1432 csi_try_fmt(priv, &upstream_ep, cfg, sdformat, crop, compose, &cc);
1433
1434 fmt = __csi_get_fmt(priv, cfg, sdformat->pad, sdformat->which);
1435 *fmt = sdformat->format;
1436
1437 if (sdformat->pad == CSI_SINK_PAD) {
1438 int pad;
1439
1440 /* propagate format to source pads */
1441 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) {
1442 const struct imx_media_pixfmt *outcc;
1443 struct v4l2_mbus_framefmt *outfmt;
1444 struct v4l2_subdev_format format;
1445
1446 format.pad = pad;
1447 format.which = sdformat->which;
1448 format.format = sdformat->format;
1449 csi_try_fmt(priv, &upstream_ep, cfg, &format,
1450 NULL, compose, &outcc);
1451
1452 outfmt = __csi_get_fmt(priv, cfg, pad, sdformat->which);
1453 *outfmt = format.format;
1454
1455 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
1456 priv->cc[pad] = outcc;
1457 }
1458 }
1459
1460 if (sdformat->which == V4L2_SUBDEV_FORMAT_TRY)
1461 goto out;
1462
1463 priv->cc[sdformat->pad] = cc;
1464
1465 /* propagate IDMAC output pad format to capture device */
1466 imx_media_mbus_fmt_to_pix_fmt(&vdev_fmt,
1467 &priv->format_mbus[CSI_SRC_PAD_IDMAC],
1468 priv->cc[CSI_SRC_PAD_IDMAC]);
1469 mutex_unlock(&priv->lock);
1470 imx_media_capture_device_set_format(vdev, &vdev_fmt);
1471
1472 return 0;
1473 out:
1474 mutex_unlock(&priv->lock);
1475 return ret;
1476 }
1477
csi_get_selection(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_selection * sel)1478 static int csi_get_selection(struct v4l2_subdev *sd,
1479 struct v4l2_subdev_pad_config *cfg,
1480 struct v4l2_subdev_selection *sel)
1481 {
1482 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1483 struct v4l2_mbus_framefmt *infmt;
1484 struct v4l2_rect *crop, *compose;
1485 int ret = 0;
1486
1487 if (sel->pad != CSI_SINK_PAD)
1488 return -EINVAL;
1489
1490 mutex_lock(&priv->lock);
1491
1492 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, sel->which);
1493 crop = __csi_get_crop(priv, cfg, sel->which);
1494 compose = __csi_get_compose(priv, cfg, sel->which);
1495
1496 switch (sel->target) {
1497 case V4L2_SEL_TGT_CROP_BOUNDS:
1498 sel->r.left = 0;
1499 sel->r.top = 0;
1500 sel->r.width = infmt->width;
1501 sel->r.height = infmt->height;
1502 break;
1503 case V4L2_SEL_TGT_CROP:
1504 sel->r = *crop;
1505 break;
1506 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
1507 sel->r.left = 0;
1508 sel->r.top = 0;
1509 sel->r.width = crop->width;
1510 sel->r.height = crop->height;
1511 break;
1512 case V4L2_SEL_TGT_COMPOSE:
1513 sel->r = *compose;
1514 break;
1515 default:
1516 ret = -EINVAL;
1517 }
1518
1519 mutex_unlock(&priv->lock);
1520 return ret;
1521 }
1522
csi_set_scale(u32 * compose,u32 crop,u32 flags)1523 static int csi_set_scale(u32 *compose, u32 crop, u32 flags)
1524 {
1525 if ((flags & (V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE)) ==
1526 (V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE) &&
1527 *compose != crop && *compose != crop / 2)
1528 return -ERANGE;
1529
1530 if (*compose <= crop / 2 ||
1531 (*compose < crop * 3 / 4 && !(flags & V4L2_SEL_FLAG_GE)) ||
1532 (*compose < crop && (flags & V4L2_SEL_FLAG_LE)))
1533 *compose = crop / 2;
1534 else
1535 *compose = crop;
1536
1537 return 0;
1538 }
1539
csi_set_selection(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_selection * sel)1540 static int csi_set_selection(struct v4l2_subdev *sd,
1541 struct v4l2_subdev_pad_config *cfg,
1542 struct v4l2_subdev_selection *sel)
1543 {
1544 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1545 struct v4l2_fwnode_endpoint upstream_ep;
1546 struct v4l2_mbus_framefmt *infmt;
1547 struct v4l2_rect *crop, *compose;
1548 int pad, ret;
1549
1550 if (sel->pad != CSI_SINK_PAD)
1551 return -EINVAL;
1552
1553 ret = csi_get_upstream_endpoint(priv, &upstream_ep);
1554 if (ret) {
1555 v4l2_err(&priv->sd, "failed to find upstream endpoint\n");
1556 return ret;
1557 }
1558
1559 mutex_lock(&priv->lock);
1560
1561 if (priv->stream_count > 0) {
1562 ret = -EBUSY;
1563 goto out;
1564 }
1565
1566 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, sel->which);
1567 crop = __csi_get_crop(priv, cfg, sel->which);
1568 compose = __csi_get_compose(priv, cfg, sel->which);
1569
1570 switch (sel->target) {
1571 case V4L2_SEL_TGT_CROP:
1572 /*
1573 * Modifying the crop rectangle always changes the format on
1574 * the source pads. If the KEEP_CONFIG flag is set, just return
1575 * the current crop rectangle.
1576 */
1577 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) {
1578 sel->r = priv->crop;
1579 if (sel->which == V4L2_SUBDEV_FORMAT_TRY)
1580 *crop = sel->r;
1581 goto out;
1582 }
1583
1584 csi_try_crop(priv, &sel->r, cfg, infmt, &upstream_ep);
1585
1586 *crop = sel->r;
1587
1588 /* Reset scaling to 1:1 */
1589 compose->width = crop->width;
1590 compose->height = crop->height;
1591 break;
1592 case V4L2_SEL_TGT_COMPOSE:
1593 /*
1594 * Modifying the compose rectangle always changes the format on
1595 * the source pads. If the KEEP_CONFIG flag is set, just return
1596 * the current compose rectangle.
1597 */
1598 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) {
1599 sel->r = priv->compose;
1600 if (sel->which == V4L2_SUBDEV_FORMAT_TRY)
1601 *compose = sel->r;
1602 goto out;
1603 }
1604
1605 sel->r.left = 0;
1606 sel->r.top = 0;
1607 ret = csi_set_scale(&sel->r.width, crop->width, sel->flags);
1608 if (ret)
1609 goto out;
1610 ret = csi_set_scale(&sel->r.height, crop->height, sel->flags);
1611 if (ret)
1612 goto out;
1613
1614 *compose = sel->r;
1615 break;
1616 default:
1617 ret = -EINVAL;
1618 goto out;
1619 }
1620
1621 /* Reset source pads to sink compose rectangle */
1622 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) {
1623 struct v4l2_mbus_framefmt *outfmt;
1624
1625 outfmt = __csi_get_fmt(priv, cfg, pad, sel->which);
1626 outfmt->width = compose->width;
1627 outfmt->height = compose->height;
1628 }
1629
1630 out:
1631 mutex_unlock(&priv->lock);
1632 return ret;
1633 }
1634
csi_subscribe_event(struct v4l2_subdev * sd,struct v4l2_fh * fh,struct v4l2_event_subscription * sub)1635 static int csi_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
1636 struct v4l2_event_subscription *sub)
1637 {
1638 if (sub->type != V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR)
1639 return -EINVAL;
1640 if (sub->id != 0)
1641 return -EINVAL;
1642
1643 return v4l2_event_subscribe(fh, sub, 0, NULL);
1644 }
1645
csi_unsubscribe_event(struct v4l2_subdev * sd,struct v4l2_fh * fh,struct v4l2_event_subscription * sub)1646 static int csi_unsubscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
1647 struct v4l2_event_subscription *sub)
1648 {
1649 return v4l2_event_unsubscribe(fh, sub);
1650 }
1651
1652 /*
1653 * retrieve our pads parsed from the OF graph by the media device
1654 */
csi_registered(struct v4l2_subdev * sd)1655 static int csi_registered(struct v4l2_subdev *sd)
1656 {
1657 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1658 struct ipu_csi *csi;
1659 int i, ret;
1660 u32 code;
1661
1662 /* get media device */
1663 priv->md = dev_get_drvdata(sd->v4l2_dev->dev);
1664
1665 /* get handle to IPU CSI */
1666 csi = ipu_csi_get(priv->ipu, priv->csi_id);
1667 if (IS_ERR(csi)) {
1668 v4l2_err(&priv->sd, "failed to get CSI%d\n", priv->csi_id);
1669 return PTR_ERR(csi);
1670 }
1671 priv->csi = csi;
1672
1673 for (i = 0; i < CSI_NUM_PADS; i++) {
1674 priv->pad[i].flags = (i == CSI_SINK_PAD) ?
1675 MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE;
1676
1677 code = 0;
1678 if (i != CSI_SINK_PAD)
1679 imx_media_enum_ipu_format(&code, 0, CS_SEL_YUV);
1680
1681 /* set a default mbus format */
1682 ret = imx_media_init_mbus_fmt(&priv->format_mbus[i],
1683 640, 480, code, V4L2_FIELD_NONE,
1684 &priv->cc[i]);
1685 if (ret)
1686 goto put_csi;
1687
1688 /* init default frame interval */
1689 priv->frame_interval[i].numerator = 1;
1690 priv->frame_interval[i].denominator = 30;
1691 }
1692
1693 /* disable frame skipping */
1694 priv->skip = &csi_skip[0];
1695
1696 /* init default crop and compose rectangle sizes */
1697 priv->crop.width = 640;
1698 priv->crop.height = 480;
1699 priv->compose.width = 640;
1700 priv->compose.height = 480;
1701
1702 priv->fim = imx_media_fim_init(&priv->sd);
1703 if (IS_ERR(priv->fim)) {
1704 ret = PTR_ERR(priv->fim);
1705 goto put_csi;
1706 }
1707
1708 ret = media_entity_pads_init(&sd->entity, CSI_NUM_PADS, priv->pad);
1709 if (ret)
1710 goto free_fim;
1711
1712 ret = imx_media_capture_device_register(priv->vdev);
1713 if (ret)
1714 goto free_fim;
1715
1716 ret = imx_media_add_video_device(priv->md, priv->vdev);
1717 if (ret)
1718 goto unreg;
1719
1720 return 0;
1721 unreg:
1722 imx_media_capture_device_unregister(priv->vdev);
1723 free_fim:
1724 if (priv->fim)
1725 imx_media_fim_free(priv->fim);
1726 put_csi:
1727 ipu_csi_put(priv->csi);
1728 return ret;
1729 }
1730
csi_unregistered(struct v4l2_subdev * sd)1731 static void csi_unregistered(struct v4l2_subdev *sd)
1732 {
1733 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1734
1735 imx_media_capture_device_unregister(priv->vdev);
1736
1737 if (priv->fim)
1738 imx_media_fim_free(priv->fim);
1739
1740 if (priv->csi)
1741 ipu_csi_put(priv->csi);
1742 }
1743
1744 static const struct media_entity_operations csi_entity_ops = {
1745 .link_setup = csi_link_setup,
1746 .link_validate = v4l2_subdev_link_validate,
1747 };
1748
1749 static const struct v4l2_subdev_core_ops csi_core_ops = {
1750 .subscribe_event = csi_subscribe_event,
1751 .unsubscribe_event = csi_unsubscribe_event,
1752 };
1753
1754 static const struct v4l2_subdev_video_ops csi_video_ops = {
1755 .g_frame_interval = csi_g_frame_interval,
1756 .s_frame_interval = csi_s_frame_interval,
1757 .s_stream = csi_s_stream,
1758 };
1759
1760 static const struct v4l2_subdev_pad_ops csi_pad_ops = {
1761 .init_cfg = imx_media_init_cfg,
1762 .enum_mbus_code = csi_enum_mbus_code,
1763 .enum_frame_size = csi_enum_frame_size,
1764 .enum_frame_interval = csi_enum_frame_interval,
1765 .get_fmt = csi_get_fmt,
1766 .set_fmt = csi_set_fmt,
1767 .get_selection = csi_get_selection,
1768 .set_selection = csi_set_selection,
1769 .link_validate = csi_link_validate,
1770 };
1771
1772 static const struct v4l2_subdev_ops csi_subdev_ops = {
1773 .core = &csi_core_ops,
1774 .video = &csi_video_ops,
1775 .pad = &csi_pad_ops,
1776 };
1777
1778 static const struct v4l2_subdev_internal_ops csi_internal_ops = {
1779 .registered = csi_registered,
1780 .unregistered = csi_unregistered,
1781 };
1782
imx_csi_probe(struct platform_device * pdev)1783 static int imx_csi_probe(struct platform_device *pdev)
1784 {
1785 struct ipu_client_platformdata *pdata;
1786 struct pinctrl *pinctrl;
1787 struct csi_priv *priv;
1788 int ret;
1789
1790 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
1791 if (!priv)
1792 return -ENOMEM;
1793
1794 platform_set_drvdata(pdev, &priv->sd);
1795 priv->dev = &pdev->dev;
1796
1797 ret = dma_set_coherent_mask(priv->dev, DMA_BIT_MASK(32));
1798 if (ret)
1799 return ret;
1800
1801 /* get parent IPU */
1802 priv->ipu = dev_get_drvdata(priv->dev->parent);
1803
1804 /* get our CSI id */
1805 pdata = priv->dev->platform_data;
1806 priv->csi_id = pdata->csi;
1807 priv->smfc_id = (priv->csi_id == 0) ? 0 : 2;
1808
1809 timer_setup(&priv->eof_timeout_timer, csi_idmac_eof_timeout, 0);
1810 spin_lock_init(&priv->irqlock);
1811
1812 v4l2_subdev_init(&priv->sd, &csi_subdev_ops);
1813 v4l2_set_subdevdata(&priv->sd, priv);
1814 priv->sd.internal_ops = &csi_internal_ops;
1815 priv->sd.entity.ops = &csi_entity_ops;
1816 priv->sd.entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
1817 priv->sd.dev = &pdev->dev;
1818 priv->sd.fwnode = of_fwnode_handle(pdata->of_node);
1819 priv->sd.owner = THIS_MODULE;
1820 priv->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
1821 priv->sd.grp_id = priv->csi_id ?
1822 IMX_MEDIA_GRP_ID_CSI1 : IMX_MEDIA_GRP_ID_CSI0;
1823 imx_media_grp_id_to_sd_name(priv->sd.name, sizeof(priv->sd.name),
1824 priv->sd.grp_id, ipu_get_num(priv->ipu));
1825
1826 priv->vdev = imx_media_capture_device_init(&priv->sd,
1827 CSI_SRC_PAD_IDMAC);
1828 if (IS_ERR(priv->vdev))
1829 return PTR_ERR(priv->vdev);
1830
1831 mutex_init(&priv->lock);
1832
1833 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0);
1834 priv->sd.ctrl_handler = &priv->ctrl_hdlr;
1835
1836 /*
1837 * The IPUv3 driver did not assign an of_node to this
1838 * device. As a result, pinctrl does not automatically
1839 * configure our pin groups, so we need to do that manually
1840 * here, after setting this device's of_node.
1841 */
1842 priv->dev->of_node = pdata->of_node;
1843 pinctrl = devm_pinctrl_get_select_default(priv->dev);
1844 if (IS_ERR(pinctrl)) {
1845 ret = PTR_ERR(pinctrl);
1846 dev_dbg(priv->dev,
1847 "devm_pinctrl_get_select_default() failed: %d\n", ret);
1848 if (ret != -ENODEV)
1849 goto free;
1850 }
1851
1852 ret = v4l2_async_register_subdev(&priv->sd);
1853 if (ret)
1854 goto free;
1855
1856 return 0;
1857 free:
1858 v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
1859 mutex_destroy(&priv->lock);
1860 imx_media_capture_device_remove(priv->vdev);
1861 return ret;
1862 }
1863
imx_csi_remove(struct platform_device * pdev)1864 static int imx_csi_remove(struct platform_device *pdev)
1865 {
1866 struct v4l2_subdev *sd = platform_get_drvdata(pdev);
1867 struct csi_priv *priv = sd_to_dev(sd);
1868
1869 v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
1870 mutex_destroy(&priv->lock);
1871 imx_media_capture_device_remove(priv->vdev);
1872 v4l2_async_unregister_subdev(sd);
1873 media_entity_cleanup(&sd->entity);
1874
1875 return 0;
1876 }
1877
1878 static const struct platform_device_id imx_csi_ids[] = {
1879 { .name = "imx-ipuv3-csi" },
1880 { },
1881 };
1882 MODULE_DEVICE_TABLE(platform, imx_csi_ids);
1883
1884 static struct platform_driver imx_csi_driver = {
1885 .probe = imx_csi_probe,
1886 .remove = imx_csi_remove,
1887 .id_table = imx_csi_ids,
1888 .driver = {
1889 .name = "imx-ipuv3-csi",
1890 },
1891 };
1892 module_platform_driver(imx_csi_driver);
1893
1894 MODULE_DESCRIPTION("i.MX CSI subdev driver");
1895 MODULE_AUTHOR("Steve Longerbeam <steve_longerbeam@mentor.com>");
1896 MODULE_LICENSE("GPL");
1897 MODULE_ALIAS("platform:imx-ipuv3-csi");
1898
