1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * V4L2 Capture CSI Subdev for Freescale i.MX5/6 SOC
4 *
5 * Copyright (c) 2014-2017 Mentor Graphics Inc.
6 * Copyright (C) 2017 Pengutronix, Philipp Zabel <kernel@pengutronix.de>
7 */
8 #include <linux/delay.h>
9 #include <linux/gcd.h>
10 #include <linux/interrupt.h>
11 #include <linux/module.h>
12 #include <linux/of_graph.h>
13 #include <linux/pinctrl/consumer.h>
14 #include <linux/platform_device.h>
15 #include <media/v4l2-ctrls.h>
16 #include <media/v4l2-device.h>
17 #include <media/v4l2-event.h>
18 #include <media/v4l2-fwnode.h>
19 #include <media/v4l2-mc.h>
20 #include <media/v4l2-subdev.h>
21 #include <media/videobuf2-dma-contig.h>
22 #include <video/imx-ipu-v3.h>
23 #include <media/imx.h>
24 #include "imx-media.h"
25
26 /*
27 * Min/Max supported width and heights.
28 *
29 * We allow planar output, so we have to align width by 16 pixels
30 * to meet IDMAC alignment requirements.
31 *
32 * TODO: move this into pad format negotiation, if capture device
33 * has not requested planar formats, we should allow 8 pixel
34 * alignment.
35 */
36 #define MIN_W 32
37 #define MIN_H 32
38 #define MAX_W 4096
39 #define MAX_H 4096
40 #define W_ALIGN 1 /* multiple of 2 pixels */
41 #define H_ALIGN 1 /* multiple of 2 lines */
42 #define S_ALIGN 1 /* multiple of 2 */
43
44 /*
45 * struct csi_skip_desc - CSI frame skipping descriptor
46 * @keep - number of frames kept per max_ratio frames
47 * @max_ratio - width of skip_smfc, written to MAX_RATIO bitfield
48 * @skip_smfc - skip pattern written to the SKIP_SMFC bitfield
49 */
50 struct csi_skip_desc {
51 u8 keep;
52 u8 max_ratio;
53 u8 skip_smfc;
54 };
55
56 struct csi_priv {
57 struct device *dev;
58 struct ipu_soc *ipu;
59 struct v4l2_subdev sd;
60 struct media_pad pad[CSI_NUM_PADS];
61 struct v4l2_async_notifier notifier;
62
63 /* the video device at IDMAC output pad */
64 struct imx_media_video_dev *vdev;
65 struct imx_media_fim *fim;
66 int csi_id;
67 int smfc_id;
68
69 /* lock to protect all members below */
70 struct mutex lock;
71
72 int active_output_pad;
73
74 struct ipuv3_channel *idmac_ch;
75 struct ipu_smfc *smfc;
76 struct ipu_csi *csi;
77
78 struct v4l2_mbus_framefmt format_mbus[CSI_NUM_PADS];
79 const struct imx_media_pixfmt *cc[CSI_NUM_PADS];
80 struct v4l2_fract frame_interval[CSI_NUM_PADS];
81 struct v4l2_rect crop;
82 struct v4l2_rect compose;
83 const struct csi_skip_desc *skip;
84
85 /* active vb2 buffers to send to video dev sink */
86 struct imx_media_buffer *active_vb2_buf[2];
87 struct imx_media_dma_buf underrun_buf;
88
89 int ipu_buf_num; /* ipu double buffer index: 0-1 */
90
91 /* the sink for the captured frames */
92 struct media_entity *sink;
93 enum ipu_csi_dest dest;
94 /* the source subdev */
95 struct v4l2_subdev *src_sd;
96
97 /* the mipi virtual channel number at link validate */
98 int vc_num;
99
100 /* the upstream endpoint CSI is receiving from */
101 struct v4l2_fwnode_endpoint upstream_ep;
102
103 spinlock_t irqlock; /* protect eof_irq handler */
104 struct timer_list eof_timeout_timer;
105 int eof_irq;
106 int nfb4eof_irq;
107
108 struct v4l2_ctrl_handler ctrl_hdlr;
109
110 int stream_count; /* streaming counter */
111 u32 frame_sequence; /* frame sequence counter */
112 bool last_eof; /* waiting for last EOF at stream off */
113 bool nfb4eof; /* NFB4EOF encountered during streaming */
114 bool interweave_swap; /* swap top/bottom lines when interweaving */
115 struct completion last_eof_comp;
116 };
117
sd_to_dev(struct v4l2_subdev * sdev)118 static inline struct csi_priv *sd_to_dev(struct v4l2_subdev *sdev)
119 {
120 return container_of(sdev, struct csi_priv, sd);
121 }
122
notifier_to_dev(struct v4l2_async_notifier * n)123 static inline struct csi_priv *notifier_to_dev(struct v4l2_async_notifier *n)
124 {
125 return container_of(n, struct csi_priv, notifier);
126 }
127
is_parallel_bus(struct v4l2_fwnode_endpoint * ep)128 static inline bool is_parallel_bus(struct v4l2_fwnode_endpoint *ep)
129 {
130 return ep->bus_type != V4L2_MBUS_CSI2_DPHY;
131 }
132
is_parallel_16bit_bus(struct v4l2_fwnode_endpoint * ep)133 static inline bool is_parallel_16bit_bus(struct v4l2_fwnode_endpoint *ep)
134 {
135 return is_parallel_bus(ep) && ep->bus.parallel.bus_width >= 16;
136 }
137
138 /*
139 * Check for conditions that require the IPU to handle the
140 * data internally as generic data, aka passthrough mode:
141 * - raw bayer media bus formats, or
142 * - the CSI is receiving from a 16-bit parallel bus, or
143 * - the CSI is receiving from an 8-bit parallel bus and the incoming
144 * media bus format is other than UYVY8_2X8/YUYV8_2X8.
145 */
requires_passthrough(struct v4l2_fwnode_endpoint * ep,struct v4l2_mbus_framefmt * infmt,const struct imx_media_pixfmt * incc)146 static inline bool requires_passthrough(struct v4l2_fwnode_endpoint *ep,
147 struct v4l2_mbus_framefmt *infmt,
148 const struct imx_media_pixfmt *incc)
149 {
150 return incc->bayer || is_parallel_16bit_bus(ep) ||
151 (is_parallel_bus(ep) &&
152 infmt->code != MEDIA_BUS_FMT_UYVY8_2X8 &&
153 infmt->code != MEDIA_BUS_FMT_YUYV8_2X8);
154 }
155
156 /*
157 * Parses the fwnode endpoint from the source pad of the entity
158 * connected to this CSI. This will either be the entity directly
159 * upstream from the CSI-2 receiver, directly upstream from the
160 * video mux, or directly upstream from the CSI itself. The endpoint
161 * is needed to determine the bus type and bus config coming into
162 * the CSI.
163 */
csi_get_upstream_endpoint(struct csi_priv * priv,struct v4l2_fwnode_endpoint * ep)164 static int csi_get_upstream_endpoint(struct csi_priv *priv,
165 struct v4l2_fwnode_endpoint *ep)
166 {
167 struct fwnode_handle *endpoint;
168 struct v4l2_subdev *sd;
169 struct media_pad *pad;
170
171 if (!IS_ENABLED(CONFIG_OF))
172 return -ENXIO;
173
174 if (!priv->src_sd)
175 return -EPIPE;
176
177 sd = priv->src_sd;
178
179 switch (sd->grp_id) {
180 case IMX_MEDIA_GRP_ID_CSI_MUX:
181 /*
182 * CSI is connected directly to CSI mux, skip up to
183 * CSI-2 receiver if it is in the path, otherwise stay
184 * with the CSI mux.
185 */
186 sd = imx_media_pipeline_subdev(&sd->entity,
187 IMX_MEDIA_GRP_ID_CSI2,
188 true);
189 if (IS_ERR(sd))
190 sd = priv->src_sd;
191 break;
192 case IMX_MEDIA_GRP_ID_CSI2:
193 break;
194 default:
195 /*
196 * the source is neither the CSI mux nor the CSI-2 receiver,
197 * get the source pad directly upstream from CSI itself.
198 */
199 sd = &priv->sd;
200 break;
201 }
202
203 /* get source pad of entity directly upstream from sd */
204 pad = imx_media_pipeline_pad(&sd->entity, 0, 0, true);
205 if (!pad)
206 return -ENODEV;
207
208 endpoint = imx_media_get_pad_fwnode(pad);
209 if (IS_ERR(endpoint))
210 return PTR_ERR(endpoint);
211
212 v4l2_fwnode_endpoint_parse(endpoint, ep);
213
214 fwnode_handle_put(endpoint);
215
216 return 0;
217 }
218
csi_idmac_put_ipu_resources(struct csi_priv * priv)219 static void csi_idmac_put_ipu_resources(struct csi_priv *priv)
220 {
221 if (priv->idmac_ch)
222 ipu_idmac_put(priv->idmac_ch);
223 priv->idmac_ch = NULL;
224
225 if (priv->smfc)
226 ipu_smfc_put(priv->smfc);
227 priv->smfc = NULL;
228 }
229
csi_idmac_get_ipu_resources(struct csi_priv * priv)230 static int csi_idmac_get_ipu_resources(struct csi_priv *priv)
231 {
232 int ch_num, ret;
233 struct ipu_smfc *smfc;
234 struct ipuv3_channel *idmac_ch;
235
236 ch_num = IPUV3_CHANNEL_CSI0 + priv->smfc_id;
237
238 smfc = ipu_smfc_get(priv->ipu, ch_num);
239 if (IS_ERR(smfc)) {
240 v4l2_err(&priv->sd, "failed to get SMFC\n");
241 ret = PTR_ERR(smfc);
242 goto out;
243 }
244 priv->smfc = smfc;
245
246 idmac_ch = ipu_idmac_get(priv->ipu, ch_num);
247 if (IS_ERR(idmac_ch)) {
248 v4l2_err(&priv->sd, "could not get IDMAC channel %u\n",
249 ch_num);
250 ret = PTR_ERR(idmac_ch);
251 goto out;
252 }
253 priv->idmac_ch = idmac_ch;
254
255 return 0;
256 out:
257 csi_idmac_put_ipu_resources(priv);
258 return ret;
259 }
260
csi_vb2_buf_done(struct csi_priv * priv)261 static void csi_vb2_buf_done(struct csi_priv *priv)
262 {
263 struct imx_media_video_dev *vdev = priv->vdev;
264 struct imx_media_buffer *done, *next;
265 struct vb2_buffer *vb;
266 dma_addr_t phys;
267
268 done = priv->active_vb2_buf[priv->ipu_buf_num];
269 if (done) {
270 done->vbuf.field = vdev->fmt.field;
271 done->vbuf.sequence = priv->frame_sequence;
272 vb = &done->vbuf.vb2_buf;
273 vb->timestamp = ktime_get_ns();
274 vb2_buffer_done(vb, priv->nfb4eof ?
275 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
276 }
277
278 priv->frame_sequence++;
279 priv->nfb4eof = false;
280
281 /* get next queued buffer */
282 next = imx_media_capture_device_next_buf(vdev);
283 if (next) {
284 phys = vb2_dma_contig_plane_dma_addr(&next->vbuf.vb2_buf, 0);
285 priv->active_vb2_buf[priv->ipu_buf_num] = next;
286 } else {
287 phys = priv->underrun_buf.phys;
288 priv->active_vb2_buf[priv->ipu_buf_num] = NULL;
289 }
290
291 if (ipu_idmac_buffer_is_ready(priv->idmac_ch, priv->ipu_buf_num))
292 ipu_idmac_clear_buffer(priv->idmac_ch, priv->ipu_buf_num);
293
294 if (priv->interweave_swap)
295 phys += vdev->fmt.bytesperline;
296
297 ipu_cpmem_set_buffer(priv->idmac_ch, priv->ipu_buf_num, phys);
298 }
299
csi_idmac_eof_interrupt(int irq,void * dev_id)300 static irqreturn_t csi_idmac_eof_interrupt(int irq, void *dev_id)
301 {
302 struct csi_priv *priv = dev_id;
303
304 spin_lock(&priv->irqlock);
305
306 if (priv->last_eof) {
307 complete(&priv->last_eof_comp);
308 priv->last_eof = false;
309 goto unlock;
310 }
311
312 if (priv->fim)
313 /* call frame interval monitor */
314 imx_media_fim_eof_monitor(priv->fim, ktime_get());
315
316 csi_vb2_buf_done(priv);
317
318 /* select new IPU buf */
319 ipu_idmac_select_buffer(priv->idmac_ch, priv->ipu_buf_num);
320 /* toggle IPU double-buffer index */
321 priv->ipu_buf_num ^= 1;
322
323 /* bump the EOF timeout timer */
324 mod_timer(&priv->eof_timeout_timer,
325 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT));
326
327 unlock:
328 spin_unlock(&priv->irqlock);
329 return IRQ_HANDLED;
330 }
331
csi_idmac_nfb4eof_interrupt(int irq,void * dev_id)332 static irqreturn_t csi_idmac_nfb4eof_interrupt(int irq, void *dev_id)
333 {
334 struct csi_priv *priv = dev_id;
335
336 spin_lock(&priv->irqlock);
337
338 /*
339 * this is not an unrecoverable error, just mark
340 * the next captured frame with vb2 error flag.
341 */
342 priv->nfb4eof = true;
343
344 v4l2_err(&priv->sd, "NFB4EOF\n");
345
346 spin_unlock(&priv->irqlock);
347
348 return IRQ_HANDLED;
349 }
350
351 /*
352 * EOF timeout timer function. This is an unrecoverable condition
353 * without a stream restart.
354 */
csi_idmac_eof_timeout(struct timer_list * t)355 static void csi_idmac_eof_timeout(struct timer_list *t)
356 {
357 struct csi_priv *priv = from_timer(priv, t, eof_timeout_timer);
358 struct imx_media_video_dev *vdev = priv->vdev;
359
360 v4l2_err(&priv->sd, "EOF timeout\n");
361
362 /* signal a fatal error to capture device */
363 imx_media_capture_device_error(vdev);
364 }
365
csi_idmac_setup_vb2_buf(struct csi_priv * priv,dma_addr_t * phys)366 static void csi_idmac_setup_vb2_buf(struct csi_priv *priv, dma_addr_t *phys)
367 {
368 struct imx_media_video_dev *vdev = priv->vdev;
369 struct imx_media_buffer *buf;
370 int i;
371
372 for (i = 0; i < 2; i++) {
373 buf = imx_media_capture_device_next_buf(vdev);
374 if (buf) {
375 priv->active_vb2_buf[i] = buf;
376 phys[i] = vb2_dma_contig_plane_dma_addr(
377 &buf->vbuf.vb2_buf, 0);
378 } else {
379 priv->active_vb2_buf[i] = NULL;
380 phys[i] = priv->underrun_buf.phys;
381 }
382 }
383 }
384
csi_idmac_unsetup_vb2_buf(struct csi_priv * priv,enum vb2_buffer_state return_status)385 static void csi_idmac_unsetup_vb2_buf(struct csi_priv *priv,
386 enum vb2_buffer_state return_status)
387 {
388 struct imx_media_buffer *buf;
389 int i;
390
391 /* return any remaining active frames with return_status */
392 for (i = 0; i < 2; i++) {
393 buf = priv->active_vb2_buf[i];
394 if (buf) {
395 struct vb2_buffer *vb = &buf->vbuf.vb2_buf;
396
397 vb->timestamp = ktime_get_ns();
398 vb2_buffer_done(vb, return_status);
399 }
400 }
401 }
402
403 /* init the SMFC IDMAC channel */
csi_idmac_setup_channel(struct csi_priv * priv)404 static int csi_idmac_setup_channel(struct csi_priv *priv)
405 {
406 struct imx_media_video_dev *vdev = priv->vdev;
407 const struct imx_media_pixfmt *incc;
408 struct v4l2_mbus_framefmt *infmt;
409 struct v4l2_mbus_framefmt *outfmt;
410 bool passthrough, interweave;
411 struct ipu_image image;
412 u32 passthrough_bits;
413 u32 passthrough_cycles;
414 dma_addr_t phys[2];
415 u32 burst_size;
416 int ret;
417
418 infmt = &priv->format_mbus[CSI_SINK_PAD];
419 incc = priv->cc[CSI_SINK_PAD];
420 outfmt = &priv->format_mbus[CSI_SRC_PAD_IDMAC];
421
422 ipu_cpmem_zero(priv->idmac_ch);
423
424 memset(&image, 0, sizeof(image));
425 image.pix = vdev->fmt;
426 image.rect = vdev->compose;
427
428 csi_idmac_setup_vb2_buf(priv, phys);
429
430 image.phys0 = phys[0];
431 image.phys1 = phys[1];
432
433 passthrough = requires_passthrough(&priv->upstream_ep, infmt, incc);
434 passthrough_cycles = 1;
435
436 /*
437 * If the field type at capture interface is interlaced, and
438 * the output IDMAC pad is sequential, enable interweave at
439 * the IDMAC output channel.
440 */
441 interweave = V4L2_FIELD_IS_INTERLACED(image.pix.field) &&
442 V4L2_FIELD_IS_SEQUENTIAL(outfmt->field);
443 priv->interweave_swap = interweave &&
444 image.pix.field == V4L2_FIELD_INTERLACED_BT;
445
446 switch (image.pix.pixelformat) {
447 case V4L2_PIX_FMT_SBGGR8:
448 case V4L2_PIX_FMT_SGBRG8:
449 case V4L2_PIX_FMT_SGRBG8:
450 case V4L2_PIX_FMT_SRGGB8:
451 case V4L2_PIX_FMT_GREY:
452 burst_size = 16;
453 passthrough_bits = 8;
454 break;
455 case V4L2_PIX_FMT_SBGGR16:
456 case V4L2_PIX_FMT_SGBRG16:
457 case V4L2_PIX_FMT_SGRBG16:
458 case V4L2_PIX_FMT_SRGGB16:
459 case V4L2_PIX_FMT_Y10:
460 case V4L2_PIX_FMT_Y12:
461 burst_size = 8;
462 passthrough_bits = 16;
463 break;
464 case V4L2_PIX_FMT_YUV420:
465 case V4L2_PIX_FMT_YVU420:
466 case V4L2_PIX_FMT_NV12:
467 burst_size = (image.pix.width & 0x3f) ?
468 ((image.pix.width & 0x1f) ?
469 ((image.pix.width & 0xf) ? 8 : 16) : 32) : 64;
470 passthrough_bits = 16;
471 /*
472 * Skip writing U and V components to odd rows (but not
473 * when enabling IDMAC interweaving, they are incompatible).
474 */
475 if (!interweave)
476 ipu_cpmem_skip_odd_chroma_rows(priv->idmac_ch);
477 break;
478 case V4L2_PIX_FMT_YUYV:
479 case V4L2_PIX_FMT_UYVY:
480 burst_size = (image.pix.width & 0x1f) ?
481 ((image.pix.width & 0xf) ? 8 : 16) : 32;
482 passthrough_bits = 16;
483 break;
484 case V4L2_PIX_FMT_RGB565:
485 if (passthrough) {
486 burst_size = 16;
487 passthrough_bits = 8;
488 passthrough_cycles = incc->cycles;
489 break;
490 }
491 fallthrough; /* non-passthrough RGB565 (CSI-2 bus) */
492 default:
493 burst_size = (image.pix.width & 0xf) ? 8 : 16;
494 passthrough_bits = 16;
495 break;
496 }
497
498 if (passthrough) {
499 if (priv->interweave_swap) {
500 /* start interweave scan at 1st top line (2nd line) */
501 image.phys0 += image.pix.bytesperline;
502 image.phys1 += image.pix.bytesperline;
503 }
504
505 ipu_cpmem_set_resolution(priv->idmac_ch,
506 image.rect.width * passthrough_cycles,
507 image.rect.height);
508 ipu_cpmem_set_stride(priv->idmac_ch, image.pix.bytesperline);
509 ipu_cpmem_set_buffer(priv->idmac_ch, 0, image.phys0);
510 ipu_cpmem_set_buffer(priv->idmac_ch, 1, image.phys1);
511 ipu_cpmem_set_format_passthrough(priv->idmac_ch,
512 passthrough_bits);
513 } else {
514 if (priv->interweave_swap) {
515 /* start interweave scan at 1st top line (2nd line) */
516 image.rect.top = 1;
517 }
518
519 ret = ipu_cpmem_set_image(priv->idmac_ch, &image);
520 if (ret)
521 goto unsetup_vb2;
522 }
523
524 ipu_cpmem_set_burstsize(priv->idmac_ch, burst_size);
525
526 /*
527 * Set the channel for the direct CSI-->memory via SMFC
528 * use-case to very high priority, by enabling the watermark
529 * signal in the SMFC, enabling WM in the channel, and setting
530 * the channel priority to high.
531 *
532 * Refer to the i.mx6 rev. D TRM Table 36-8: Calculated priority
533 * value.
534 *
535 * The WM's are set very low by intention here to ensure that
536 * the SMFC FIFOs do not overflow.
537 */
538 ipu_smfc_set_watermark(priv->smfc, 0x02, 0x01);
539 ipu_cpmem_set_high_priority(priv->idmac_ch);
540 ipu_idmac_enable_watermark(priv->idmac_ch, true);
541 ipu_cpmem_set_axi_id(priv->idmac_ch, 0);
542
543 burst_size = passthrough ?
544 (burst_size >> 3) - 1 : (burst_size >> 2) - 1;
545
546 ipu_smfc_set_burstsize(priv->smfc, burst_size);
547
548 if (interweave)
549 ipu_cpmem_interlaced_scan(priv->idmac_ch,
550 priv->interweave_swap ?
551 -image.pix.bytesperline :
552 image.pix.bytesperline,
553 image.pix.pixelformat);
554
555 ipu_idmac_set_double_buffer(priv->idmac_ch, true);
556
557 return 0;
558
559 unsetup_vb2:
560 csi_idmac_unsetup_vb2_buf(priv, VB2_BUF_STATE_QUEUED);
561 return ret;
562 }
563
csi_idmac_unsetup(struct csi_priv * priv,enum vb2_buffer_state state)564 static void csi_idmac_unsetup(struct csi_priv *priv,
565 enum vb2_buffer_state state)
566 {
567 ipu_idmac_disable_channel(priv->idmac_ch);
568 ipu_smfc_disable(priv->smfc);
569
570 csi_idmac_unsetup_vb2_buf(priv, state);
571 }
572
csi_idmac_setup(struct csi_priv * priv)573 static int csi_idmac_setup(struct csi_priv *priv)
574 {
575 int ret;
576
577 ret = csi_idmac_setup_channel(priv);
578 if (ret)
579 return ret;
580
581 ipu_cpmem_dump(priv->idmac_ch);
582 ipu_dump(priv->ipu);
583
584 ipu_smfc_enable(priv->smfc);
585
586 /* set buffers ready */
587 ipu_idmac_select_buffer(priv->idmac_ch, 0);
588 ipu_idmac_select_buffer(priv->idmac_ch, 1);
589
590 /* enable the channels */
591 ipu_idmac_enable_channel(priv->idmac_ch);
592
593 return 0;
594 }
595
csi_idmac_start(struct csi_priv * priv)596 static int csi_idmac_start(struct csi_priv *priv)
597 {
598 struct imx_media_video_dev *vdev = priv->vdev;
599 int ret;
600
601 ret = csi_idmac_get_ipu_resources(priv);
602 if (ret)
603 return ret;
604
605 ipu_smfc_map_channel(priv->smfc, priv->csi_id, priv->vc_num);
606
607 ret = imx_media_alloc_dma_buf(priv->dev, &priv->underrun_buf,
608 vdev->fmt.sizeimage);
609 if (ret)
610 goto out_put_ipu;
611
612 priv->ipu_buf_num = 0;
613
614 /* init EOF completion waitq */
615 init_completion(&priv->last_eof_comp);
616 priv->frame_sequence = 0;
617 priv->last_eof = false;
618 priv->nfb4eof = false;
619
620 ret = csi_idmac_setup(priv);
621 if (ret) {
622 v4l2_err(&priv->sd, "csi_idmac_setup failed: %d\n", ret);
623 goto out_free_dma_buf;
624 }
625
626 priv->nfb4eof_irq = ipu_idmac_channel_irq(priv->ipu,
627 priv->idmac_ch,
628 IPU_IRQ_NFB4EOF);
629 ret = devm_request_irq(priv->dev, priv->nfb4eof_irq,
630 csi_idmac_nfb4eof_interrupt, 0,
631 "imx-smfc-nfb4eof", priv);
632 if (ret) {
633 v4l2_err(&priv->sd,
634 "Error registering NFB4EOF irq: %d\n", ret);
635 goto out_unsetup;
636 }
637
638 priv->eof_irq = ipu_idmac_channel_irq(priv->ipu, priv->idmac_ch,
639 IPU_IRQ_EOF);
640
641 ret = devm_request_irq(priv->dev, priv->eof_irq,
642 csi_idmac_eof_interrupt, 0,
643 "imx-smfc-eof", priv);
644 if (ret) {
645 v4l2_err(&priv->sd,
646 "Error registering eof irq: %d\n", ret);
647 goto out_free_nfb4eof_irq;
648 }
649
650 /* start the EOF timeout timer */
651 mod_timer(&priv->eof_timeout_timer,
652 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT));
653
654 return 0;
655
656 out_free_nfb4eof_irq:
657 devm_free_irq(priv->dev, priv->nfb4eof_irq, priv);
658 out_unsetup:
659 csi_idmac_unsetup(priv, VB2_BUF_STATE_QUEUED);
660 out_free_dma_buf:
661 imx_media_free_dma_buf(priv->dev, &priv->underrun_buf);
662 out_put_ipu:
663 csi_idmac_put_ipu_resources(priv);
664 return ret;
665 }
666
csi_idmac_wait_last_eof(struct csi_priv * priv)667 static void csi_idmac_wait_last_eof(struct csi_priv *priv)
668 {
669 unsigned long flags;
670 int ret;
671
672 /* mark next EOF interrupt as the last before stream off */
673 spin_lock_irqsave(&priv->irqlock, flags);
674 priv->last_eof = true;
675 spin_unlock_irqrestore(&priv->irqlock, flags);
676
677 /*
678 * and then wait for interrupt handler to mark completion.
679 */
680 ret = wait_for_completion_timeout(
681 &priv->last_eof_comp, msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT));
682 if (ret == 0)
683 v4l2_warn(&priv->sd, "wait last EOF timeout\n");
684 }
685
csi_idmac_stop(struct csi_priv * priv)686 static void csi_idmac_stop(struct csi_priv *priv)
687 {
688 devm_free_irq(priv->dev, priv->eof_irq, priv);
689 devm_free_irq(priv->dev, priv->nfb4eof_irq, priv);
690
691 csi_idmac_unsetup(priv, VB2_BUF_STATE_ERROR);
692
693 imx_media_free_dma_buf(priv->dev, &priv->underrun_buf);
694
695 /* cancel the EOF timeout timer */
696 del_timer_sync(&priv->eof_timeout_timer);
697
698 csi_idmac_put_ipu_resources(priv);
699 }
700
701 /* Update the CSI whole sensor and active windows */
csi_setup(struct csi_priv * priv)702 static int csi_setup(struct csi_priv *priv)
703 {
704 struct v4l2_mbus_framefmt *infmt, *outfmt;
705 const struct imx_media_pixfmt *incc;
706 struct v4l2_mbus_config mbus_cfg;
707 struct v4l2_mbus_framefmt if_fmt;
708 struct v4l2_rect crop;
709
710 infmt = &priv->format_mbus[CSI_SINK_PAD];
711 incc = priv->cc[CSI_SINK_PAD];
712 outfmt = &priv->format_mbus[priv->active_output_pad];
713
714 /* compose mbus_config from the upstream endpoint */
715 mbus_cfg.type = priv->upstream_ep.bus_type;
716 mbus_cfg.flags = is_parallel_bus(&priv->upstream_ep) ?
717 priv->upstream_ep.bus.parallel.flags :
718 priv->upstream_ep.bus.mipi_csi2.flags;
719
720 if_fmt = *infmt;
721 crop = priv->crop;
722
723 /*
724 * if cycles is set, we need to handle this over multiple cycles as
725 * generic/bayer data
726 */
727 if (is_parallel_bus(&priv->upstream_ep) && incc->cycles) {
728 if_fmt.width *= incc->cycles;
729 crop.width *= incc->cycles;
730 }
731
732 ipu_csi_set_window(priv->csi, &crop);
733
734 ipu_csi_set_downsize(priv->csi,
735 priv->crop.width == 2 * priv->compose.width,
736 priv->crop.height == 2 * priv->compose.height);
737
738 ipu_csi_init_interface(priv->csi, &mbus_cfg, &if_fmt, outfmt);
739
740 ipu_csi_set_dest(priv->csi, priv->dest);
741
742 if (priv->dest == IPU_CSI_DEST_IDMAC)
743 ipu_csi_set_skip_smfc(priv->csi, priv->skip->skip_smfc,
744 priv->skip->max_ratio - 1, 0);
745
746 ipu_csi_dump(priv->csi);
747
748 return 0;
749 }
750
csi_start(struct csi_priv * priv)751 static int csi_start(struct csi_priv *priv)
752 {
753 struct v4l2_fract *input_fi, *output_fi;
754 int ret;
755
756 input_fi = &priv->frame_interval[CSI_SINK_PAD];
757 output_fi = &priv->frame_interval[priv->active_output_pad];
758
759 /* start upstream */
760 ret = v4l2_subdev_call(priv->src_sd, video, s_stream, 1);
761 ret = (ret && ret != -ENOIOCTLCMD) ? ret : 0;
762 if (ret)
763 return ret;
764
765 /* Skip first few frames from a BT.656 source */
766 if (priv->upstream_ep.bus_type == V4L2_MBUS_BT656) {
767 u32 delay_usec, bad_frames = 20;
768
769 delay_usec = DIV_ROUND_UP_ULL((u64)USEC_PER_SEC *
770 input_fi->numerator * bad_frames,
771 input_fi->denominator);
772
773 usleep_range(delay_usec, delay_usec + 1000);
774 }
775
776 if (priv->dest == IPU_CSI_DEST_IDMAC) {
777 ret = csi_idmac_start(priv);
778 if (ret)
779 goto stop_upstream;
780 }
781
782 ret = csi_setup(priv);
783 if (ret)
784 goto idmac_stop;
785
786 /* start the frame interval monitor */
787 if (priv->fim && priv->dest == IPU_CSI_DEST_IDMAC) {
788 ret = imx_media_fim_set_stream(priv->fim, output_fi, true);
789 if (ret)
790 goto idmac_stop;
791 }
792
793 ret = ipu_csi_enable(priv->csi);
794 if (ret) {
795 v4l2_err(&priv->sd, "CSI enable error: %d\n", ret);
796 goto fim_off;
797 }
798
799 return 0;
800
801 fim_off:
802 if (priv->fim && priv->dest == IPU_CSI_DEST_IDMAC)
803 imx_media_fim_set_stream(priv->fim, NULL, false);
804 idmac_stop:
805 if (priv->dest == IPU_CSI_DEST_IDMAC)
806 csi_idmac_stop(priv);
807 stop_upstream:
808 v4l2_subdev_call(priv->src_sd, video, s_stream, 0);
809 return ret;
810 }
811
csi_stop(struct csi_priv * priv)812 static void csi_stop(struct csi_priv *priv)
813 {
814 if (priv->dest == IPU_CSI_DEST_IDMAC)
815 csi_idmac_wait_last_eof(priv);
816
817 /*
818 * Disable the CSI asap, after syncing with the last EOF.
819 * Doing so after the IDMA channel is disabled has shown to
820 * create hard system-wide hangs.
821 */
822 ipu_csi_disable(priv->csi);
823
824 /* stop upstream */
825 v4l2_subdev_call(priv->src_sd, video, s_stream, 0);
826
827 if (priv->dest == IPU_CSI_DEST_IDMAC) {
828 csi_idmac_stop(priv);
829
830 /* stop the frame interval monitor */
831 if (priv->fim)
832 imx_media_fim_set_stream(priv->fim, NULL, false);
833 }
834 }
835
836 static const struct csi_skip_desc csi_skip[12] = {
837 { 1, 1, 0x00 }, /* Keep all frames */
838 { 5, 6, 0x10 }, /* Skip every sixth frame */
839 { 4, 5, 0x08 }, /* Skip every fifth frame */
840 { 3, 4, 0x04 }, /* Skip every fourth frame */
841 { 2, 3, 0x02 }, /* Skip every third frame */
842 { 3, 5, 0x0a }, /* Skip frames 1 and 3 of every 5 */
843 { 1, 2, 0x01 }, /* Skip every second frame */
844 { 2, 5, 0x0b }, /* Keep frames 1 and 4 of every 5 */
845 { 1, 3, 0x03 }, /* Keep one in three frames */
846 { 1, 4, 0x07 }, /* Keep one in four frames */
847 { 1, 5, 0x0f }, /* Keep one in five frames */
848 { 1, 6, 0x1f }, /* Keep one in six frames */
849 };
850
csi_apply_skip_interval(const struct csi_skip_desc * skip,struct v4l2_fract * interval)851 static void csi_apply_skip_interval(const struct csi_skip_desc *skip,
852 struct v4l2_fract *interval)
853 {
854 unsigned int div;
855
856 interval->numerator *= skip->max_ratio;
857 interval->denominator *= skip->keep;
858
859 /* Reduce fraction to lowest terms */
860 div = gcd(interval->numerator, interval->denominator);
861 if (div > 1) {
862 interval->numerator /= div;
863 interval->denominator /= div;
864 }
865 }
866
867 /*
868 * Find the skip pattern to produce the output frame interval closest to the
869 * requested one, for the given input frame interval. Updates the output frame
870 * interval to the exact value.
871 */
csi_find_best_skip(struct v4l2_fract * in,struct v4l2_fract * out)872 static const struct csi_skip_desc *csi_find_best_skip(struct v4l2_fract *in,
873 struct v4l2_fract *out)
874 {
875 const struct csi_skip_desc *skip = &csi_skip[0], *best_skip = skip;
876 u32 min_err = UINT_MAX;
877 u64 want_us;
878 int i;
879
880 /* Default to 1:1 ratio */
881 if (out->numerator == 0 || out->denominator == 0 ||
882 in->numerator == 0 || in->denominator == 0) {
883 *out = *in;
884 return best_skip;
885 }
886
887 want_us = div_u64((u64)USEC_PER_SEC * out->numerator, out->denominator);
888
889 /* Find the reduction closest to the requested time per frame */
890 for (i = 0; i < ARRAY_SIZE(csi_skip); i++, skip++) {
891 u64 tmp, err;
892
893 tmp = div_u64((u64)USEC_PER_SEC * in->numerator *
894 skip->max_ratio, in->denominator * skip->keep);
895
896 err = abs((s64)tmp - want_us);
897 if (err < min_err) {
898 min_err = err;
899 best_skip = skip;
900 }
901 }
902
903 *out = *in;
904 csi_apply_skip_interval(best_skip, out);
905
906 return best_skip;
907 }
908
909 /*
910 * V4L2 subdev operations.
911 */
912
csi_g_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * fi)913 static int csi_g_frame_interval(struct v4l2_subdev *sd,
914 struct v4l2_subdev_frame_interval *fi)
915 {
916 struct csi_priv *priv = v4l2_get_subdevdata(sd);
917
918 if (fi->pad >= CSI_NUM_PADS)
919 return -EINVAL;
920
921 mutex_lock(&priv->lock);
922
923 fi->interval = priv->frame_interval[fi->pad];
924
925 mutex_unlock(&priv->lock);
926
927 return 0;
928 }
929
csi_s_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * fi)930 static int csi_s_frame_interval(struct v4l2_subdev *sd,
931 struct v4l2_subdev_frame_interval *fi)
932 {
933 struct csi_priv *priv = v4l2_get_subdevdata(sd);
934 struct v4l2_fract *input_fi;
935 int ret = 0;
936
937 mutex_lock(&priv->lock);
938
939 input_fi = &priv->frame_interval[CSI_SINK_PAD];
940
941 switch (fi->pad) {
942 case CSI_SINK_PAD:
943 /* No limits on valid input frame intervals */
944 if (fi->interval.numerator == 0 ||
945 fi->interval.denominator == 0)
946 fi->interval = *input_fi;
947 /* Reset output intervals and frame skipping ratio to 1:1 */
948 priv->frame_interval[CSI_SRC_PAD_IDMAC] = fi->interval;
949 priv->frame_interval[CSI_SRC_PAD_DIRECT] = fi->interval;
950 priv->skip = &csi_skip[0];
951 break;
952 case CSI_SRC_PAD_IDMAC:
953 /*
954 * frame interval at IDMAC output pad depends on input
955 * interval, modified by frame skipping.
956 */
957 priv->skip = csi_find_best_skip(input_fi, &fi->interval);
958 break;
959 case CSI_SRC_PAD_DIRECT:
960 /*
961 * frame interval at DIRECT output pad is same as input
962 * interval.
963 */
964 fi->interval = *input_fi;
965 break;
966 default:
967 ret = -EINVAL;
968 goto out;
969 }
970
971 priv->frame_interval[fi->pad] = fi->interval;
972 out:
973 mutex_unlock(&priv->lock);
974 return ret;
975 }
976
csi_s_stream(struct v4l2_subdev * sd,int enable)977 static int csi_s_stream(struct v4l2_subdev *sd, int enable)
978 {
979 struct csi_priv *priv = v4l2_get_subdevdata(sd);
980 int ret = 0;
981
982 mutex_lock(&priv->lock);
983
984 if (!priv->src_sd || !priv->sink) {
985 ret = -EPIPE;
986 goto out;
987 }
988
989 /*
990 * enable/disable streaming only if stream_count is
991 * going from 0 to 1 / 1 to 0.
992 */
993 if (priv->stream_count != !enable)
994 goto update_count;
995
996 if (enable) {
997 dev_dbg(priv->dev, "stream ON\n");
998 ret = csi_start(priv);
999 if (ret)
1000 goto out;
1001 } else {
1002 dev_dbg(priv->dev, "stream OFF\n");
1003 csi_stop(priv);
1004 }
1005
1006 update_count:
1007 priv->stream_count += enable ? 1 : -1;
1008 if (priv->stream_count < 0)
1009 priv->stream_count = 0;
1010 out:
1011 mutex_unlock(&priv->lock);
1012 return ret;
1013 }
1014
csi_link_setup(struct media_entity * entity,const struct media_pad * local,const struct media_pad * remote,u32 flags)1015 static int csi_link_setup(struct media_entity *entity,
1016 const struct media_pad *local,
1017 const struct media_pad *remote, u32 flags)
1018 {
1019 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
1020 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1021 struct v4l2_subdev *remote_sd;
1022 int ret = 0;
1023
1024 dev_dbg(priv->dev, "link setup %s -> %s\n", remote->entity->name,
1025 local->entity->name);
1026
1027 mutex_lock(&priv->lock);
1028
1029 if (local->flags & MEDIA_PAD_FL_SINK) {
1030 if (!is_media_entity_v4l2_subdev(remote->entity)) {
1031 ret = -EINVAL;
1032 goto out;
1033 }
1034
1035 remote_sd = media_entity_to_v4l2_subdev(remote->entity);
1036
1037 if (flags & MEDIA_LNK_FL_ENABLED) {
1038 if (priv->src_sd) {
1039 ret = -EBUSY;
1040 goto out;
1041 }
1042 priv->src_sd = remote_sd;
1043 } else {
1044 priv->src_sd = NULL;
1045 }
1046
1047 goto out;
1048 }
1049
1050 /* this is a source pad */
1051
1052 if (flags & MEDIA_LNK_FL_ENABLED) {
1053 if (priv->sink) {
1054 ret = -EBUSY;
1055 goto out;
1056 }
1057 } else {
1058 v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
1059 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0);
1060 priv->sink = NULL;
1061 /* do not apply IC burst alignment in csi_try_crop */
1062 priv->active_output_pad = CSI_SRC_PAD_IDMAC;
1063 goto out;
1064 }
1065
1066 /* record which output pad is now active */
1067 priv->active_output_pad = local->index;
1068
1069 /* set CSI destination */
1070 if (local->index == CSI_SRC_PAD_IDMAC) {
1071 if (!is_media_entity_v4l2_video_device(remote->entity)) {
1072 ret = -EINVAL;
1073 goto out;
1074 }
1075
1076 if (priv->fim) {
1077 ret = imx_media_fim_add_controls(priv->fim);
1078 if (ret)
1079 goto out;
1080 }
1081
1082 priv->dest = IPU_CSI_DEST_IDMAC;
1083 } else {
1084 if (!is_media_entity_v4l2_subdev(remote->entity)) {
1085 ret = -EINVAL;
1086 goto out;
1087 }
1088
1089 remote_sd = media_entity_to_v4l2_subdev(remote->entity);
1090 switch (remote_sd->grp_id) {
1091 case IMX_MEDIA_GRP_ID_IPU_VDIC:
1092 priv->dest = IPU_CSI_DEST_VDIC;
1093 break;
1094 case IMX_MEDIA_GRP_ID_IPU_IC_PRP:
1095 priv->dest = IPU_CSI_DEST_IC;
1096 break;
1097 default:
1098 ret = -EINVAL;
1099 goto out;
1100 }
1101 }
1102
1103 priv->sink = remote->entity;
1104 out:
1105 mutex_unlock(&priv->lock);
1106 return ret;
1107 }
1108
csi_link_validate(struct v4l2_subdev * sd,struct media_link * link,struct v4l2_subdev_format * source_fmt,struct v4l2_subdev_format * sink_fmt)1109 static int csi_link_validate(struct v4l2_subdev *sd,
1110 struct media_link *link,
1111 struct v4l2_subdev_format *source_fmt,
1112 struct v4l2_subdev_format *sink_fmt)
1113 {
1114 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1115 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 };
1116 bool is_csi2;
1117 int ret;
1118
1119 ret = v4l2_subdev_link_validate_default(sd, link,
1120 source_fmt, sink_fmt);
1121 if (ret)
1122 return ret;
1123
1124 ret = csi_get_upstream_endpoint(priv, &upstream_ep);
1125 if (ret) {
1126 v4l2_err(&priv->sd, "failed to find upstream endpoint\n");
1127 return ret;
1128 }
1129
1130 mutex_lock(&priv->lock);
1131
1132 priv->upstream_ep = upstream_ep;
1133 is_csi2 = !is_parallel_bus(&upstream_ep);
1134 if (is_csi2) {
1135 /*
1136 * NOTE! It seems the virtual channels from the mipi csi-2
1137 * receiver are used only for routing by the video mux's,
1138 * or for hard-wired routing to the CSI's. Once the stream
1139 * enters the CSI's however, they are treated internally
1140 * in the IPU as virtual channel 0.
1141 */
1142 ipu_csi_set_mipi_datatype(priv->csi, 0,
1143 &priv->format_mbus[CSI_SINK_PAD]);
1144 }
1145
1146 /* select either parallel or MIPI-CSI2 as input to CSI */
1147 ipu_set_csi_src_mux(priv->ipu, priv->csi_id, is_csi2);
1148
1149 mutex_unlock(&priv->lock);
1150 return ret;
1151 }
1152
1153 static struct v4l2_mbus_framefmt *
__csi_get_fmt(struct csi_priv * priv,struct v4l2_subdev_state * sd_state,unsigned int pad,enum v4l2_subdev_format_whence which)1154 __csi_get_fmt(struct csi_priv *priv, struct v4l2_subdev_state *sd_state,
1155 unsigned int pad, enum v4l2_subdev_format_whence which)
1156 {
1157 if (which == V4L2_SUBDEV_FORMAT_TRY)
1158 return v4l2_subdev_get_try_format(&priv->sd, sd_state, pad);
1159 else
1160 return &priv->format_mbus[pad];
1161 }
1162
1163 static struct v4l2_rect *
__csi_get_crop(struct csi_priv * priv,struct v4l2_subdev_state * sd_state,enum v4l2_subdev_format_whence which)1164 __csi_get_crop(struct csi_priv *priv, struct v4l2_subdev_state *sd_state,
1165 enum v4l2_subdev_format_whence which)
1166 {
1167 if (which == V4L2_SUBDEV_FORMAT_TRY)
1168 return v4l2_subdev_get_try_crop(&priv->sd, sd_state,
1169 CSI_SINK_PAD);
1170 else
1171 return &priv->crop;
1172 }
1173
1174 static struct v4l2_rect *
__csi_get_compose(struct csi_priv * priv,struct v4l2_subdev_state * sd_state,enum v4l2_subdev_format_whence which)1175 __csi_get_compose(struct csi_priv *priv, struct v4l2_subdev_state *sd_state,
1176 enum v4l2_subdev_format_whence which)
1177 {
1178 if (which == V4L2_SUBDEV_FORMAT_TRY)
1179 return v4l2_subdev_get_try_compose(&priv->sd, sd_state,
1180 CSI_SINK_PAD);
1181 else
1182 return &priv->compose;
1183 }
1184
csi_try_crop(struct csi_priv * priv,struct v4l2_rect * crop,struct v4l2_subdev_state * sd_state,struct v4l2_mbus_framefmt * infmt,struct v4l2_fwnode_endpoint * upstream_ep)1185 static void csi_try_crop(struct csi_priv *priv,
1186 struct v4l2_rect *crop,
1187 struct v4l2_subdev_state *sd_state,
1188 struct v4l2_mbus_framefmt *infmt,
1189 struct v4l2_fwnode_endpoint *upstream_ep)
1190 {
1191 u32 in_height;
1192
1193 crop->width = min_t(__u32, infmt->width, crop->width);
1194 if (crop->left + crop->width > infmt->width)
1195 crop->left = infmt->width - crop->width;
1196 /* adjust crop left/width to h/w alignment restrictions */
1197 crop->left &= ~0x3;
1198 if (priv->active_output_pad == CSI_SRC_PAD_DIRECT)
1199 crop->width &= ~0x7; /* multiple of 8 pixels (IC burst) */
1200 else
1201 crop->width &= ~0x1; /* multiple of 2 pixels */
1202
1203 in_height = infmt->height;
1204 if (infmt->field == V4L2_FIELD_ALTERNATE)
1205 in_height *= 2;
1206
1207 /*
1208 * FIXME: not sure why yet, but on interlaced bt.656,
1209 * changing the vertical cropping causes loss of vertical
1210 * sync, so fix it to NTSC/PAL active lines. NTSC contains
1211 * 2 extra lines of active video that need to be cropped.
1212 */
1213 if (upstream_ep->bus_type == V4L2_MBUS_BT656 &&
1214 (V4L2_FIELD_HAS_BOTH(infmt->field) ||
1215 infmt->field == V4L2_FIELD_ALTERNATE)) {
1216 crop->height = in_height;
1217 crop->top = (in_height == 480) ? 2 : 0;
1218 } else {
1219 crop->height = min_t(__u32, in_height, crop->height);
1220 if (crop->top + crop->height > in_height)
1221 crop->top = in_height - crop->height;
1222 }
1223 }
1224
csi_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)1225 static int csi_enum_mbus_code(struct v4l2_subdev *sd,
1226 struct v4l2_subdev_state *sd_state,
1227 struct v4l2_subdev_mbus_code_enum *code)
1228 {
1229 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1230 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 };
1231 const struct imx_media_pixfmt *incc;
1232 struct v4l2_mbus_framefmt *infmt;
1233 int ret = 0;
1234
1235 mutex_lock(&priv->lock);
1236
1237 infmt = __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, code->which);
1238 incc = imx_media_find_mbus_format(infmt->code, PIXFMT_SEL_ANY);
1239
1240 switch (code->pad) {
1241 case CSI_SINK_PAD:
1242 ret = imx_media_enum_mbus_formats(&code->code, code->index,
1243 PIXFMT_SEL_ANY);
1244 break;
1245 case CSI_SRC_PAD_DIRECT:
1246 case CSI_SRC_PAD_IDMAC:
1247 ret = csi_get_upstream_endpoint(priv, &upstream_ep);
1248 if (ret) {
1249 v4l2_err(&priv->sd, "failed to find upstream endpoint\n");
1250 goto out;
1251 }
1252
1253 if (requires_passthrough(&upstream_ep, infmt, incc)) {
1254 if (code->index != 0) {
1255 ret = -EINVAL;
1256 goto out;
1257 }
1258 code->code = infmt->code;
1259 } else {
1260 enum imx_pixfmt_sel fmt_sel =
1261 (incc->cs == IPUV3_COLORSPACE_YUV) ?
1262 PIXFMT_SEL_YUV : PIXFMT_SEL_RGB;
1263
1264 ret = imx_media_enum_ipu_formats(&code->code,
1265 code->index,
1266 fmt_sel);
1267 }
1268 break;
1269 default:
1270 ret = -EINVAL;
1271 }
1272
1273 out:
1274 mutex_unlock(&priv->lock);
1275 return ret;
1276 }
1277
csi_enum_frame_size(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_frame_size_enum * fse)1278 static int csi_enum_frame_size(struct v4l2_subdev *sd,
1279 struct v4l2_subdev_state *sd_state,
1280 struct v4l2_subdev_frame_size_enum *fse)
1281 {
1282 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1283 struct v4l2_rect *crop;
1284 int ret = 0;
1285
1286 if (fse->pad >= CSI_NUM_PADS ||
1287 fse->index > (fse->pad == CSI_SINK_PAD ? 0 : 3))
1288 return -EINVAL;
1289
1290 mutex_lock(&priv->lock);
1291
1292 if (fse->pad == CSI_SINK_PAD) {
1293 fse->min_width = MIN_W;
1294 fse->max_width = MAX_W;
1295 fse->min_height = MIN_H;
1296 fse->max_height = MAX_H;
1297 } else {
1298 crop = __csi_get_crop(priv, sd_state, fse->which);
1299
1300 fse->min_width = fse->index & 1 ?
1301 crop->width / 2 : crop->width;
1302 fse->max_width = fse->min_width;
1303 fse->min_height = fse->index & 2 ?
1304 crop->height / 2 : crop->height;
1305 fse->max_height = fse->min_height;
1306 }
1307
1308 mutex_unlock(&priv->lock);
1309 return ret;
1310 }
1311
csi_enum_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_frame_interval_enum * fie)1312 static int csi_enum_frame_interval(struct v4l2_subdev *sd,
1313 struct v4l2_subdev_state *sd_state,
1314 struct v4l2_subdev_frame_interval_enum *fie)
1315 {
1316 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1317 struct v4l2_fract *input_fi;
1318 struct v4l2_rect *crop;
1319 int ret = 0;
1320
1321 if (fie->pad >= CSI_NUM_PADS ||
1322 fie->index >= (fie->pad != CSI_SRC_PAD_IDMAC ?
1323 1 : ARRAY_SIZE(csi_skip)))
1324 return -EINVAL;
1325
1326 mutex_lock(&priv->lock);
1327
1328 input_fi = &priv->frame_interval[CSI_SINK_PAD];
1329 crop = __csi_get_crop(priv, sd_state, fie->which);
1330
1331 if ((fie->width != crop->width && fie->width != crop->width / 2) ||
1332 (fie->height != crop->height && fie->height != crop->height / 2)) {
1333 ret = -EINVAL;
1334 goto out;
1335 }
1336
1337 fie->interval = *input_fi;
1338
1339 if (fie->pad == CSI_SRC_PAD_IDMAC)
1340 csi_apply_skip_interval(&csi_skip[fie->index],
1341 &fie->interval);
1342
1343 out:
1344 mutex_unlock(&priv->lock);
1345 return ret;
1346 }
1347
csi_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * sdformat)1348 static int csi_get_fmt(struct v4l2_subdev *sd,
1349 struct v4l2_subdev_state *sd_state,
1350 struct v4l2_subdev_format *sdformat)
1351 {
1352 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1353 struct v4l2_mbus_framefmt *fmt;
1354 int ret = 0;
1355
1356 if (sdformat->pad >= CSI_NUM_PADS)
1357 return -EINVAL;
1358
1359 mutex_lock(&priv->lock);
1360
1361 fmt = __csi_get_fmt(priv, sd_state, sdformat->pad, sdformat->which);
1362 if (!fmt) {
1363 ret = -EINVAL;
1364 goto out;
1365 }
1366
1367 sdformat->format = *fmt;
1368 out:
1369 mutex_unlock(&priv->lock);
1370 return ret;
1371 }
1372
csi_try_field(struct csi_priv * priv,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * sdformat)1373 static void csi_try_field(struct csi_priv *priv,
1374 struct v4l2_subdev_state *sd_state,
1375 struct v4l2_subdev_format *sdformat)
1376 {
1377 struct v4l2_mbus_framefmt *infmt =
1378 __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, sdformat->which);
1379
1380 /*
1381 * no restrictions on sink pad field type except must
1382 * be initialized.
1383 */
1384 if (sdformat->pad == CSI_SINK_PAD) {
1385 if (sdformat->format.field == V4L2_FIELD_ANY)
1386 sdformat->format.field = V4L2_FIELD_NONE;
1387 return;
1388 }
1389
1390 switch (infmt->field) {
1391 case V4L2_FIELD_SEQ_TB:
1392 case V4L2_FIELD_SEQ_BT:
1393 /*
1394 * If the user requests sequential at the source pad,
1395 * allow it (along with possibly inverting field order).
1396 * Otherwise passthrough the field type.
1397 */
1398 if (!V4L2_FIELD_IS_SEQUENTIAL(sdformat->format.field))
1399 sdformat->format.field = infmt->field;
1400 break;
1401 case V4L2_FIELD_ALTERNATE:
1402 /*
1403 * This driver does not support alternate field mode, and
1404 * the CSI captures a whole frame, so the CSI never presents
1405 * alternate mode at its source pads. If user has not
1406 * already requested sequential, translate ALTERNATE at
1407 * sink pad to SEQ_TB or SEQ_BT at the source pad depending
1408 * on input height (assume NTSC BT order if 480 total active
1409 * frame lines, otherwise PAL TB order).
1410 */
1411 if (!V4L2_FIELD_IS_SEQUENTIAL(sdformat->format.field))
1412 sdformat->format.field = (infmt->height == 480 / 2) ?
1413 V4L2_FIELD_SEQ_BT : V4L2_FIELD_SEQ_TB;
1414 break;
1415 default:
1416 /* Passthrough for all other input field types */
1417 sdformat->format.field = infmt->field;
1418 break;
1419 }
1420 }
1421
csi_try_fmt(struct csi_priv * priv,struct v4l2_fwnode_endpoint * upstream_ep,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * sdformat,struct v4l2_rect * crop,struct v4l2_rect * compose,const struct imx_media_pixfmt ** cc)1422 static void csi_try_fmt(struct csi_priv *priv,
1423 struct v4l2_fwnode_endpoint *upstream_ep,
1424 struct v4l2_subdev_state *sd_state,
1425 struct v4l2_subdev_format *sdformat,
1426 struct v4l2_rect *crop,
1427 struct v4l2_rect *compose,
1428 const struct imx_media_pixfmt **cc)
1429 {
1430 const struct imx_media_pixfmt *incc;
1431 struct v4l2_mbus_framefmt *infmt;
1432 u32 code;
1433
1434 infmt = __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, sdformat->which);
1435
1436 switch (sdformat->pad) {
1437 case CSI_SRC_PAD_DIRECT:
1438 case CSI_SRC_PAD_IDMAC:
1439 incc = imx_media_find_mbus_format(infmt->code, PIXFMT_SEL_ANY);
1440
1441 sdformat->format.width = compose->width;
1442 sdformat->format.height = compose->height;
1443
1444 if (requires_passthrough(upstream_ep, infmt, incc)) {
1445 sdformat->format.code = infmt->code;
1446 *cc = incc;
1447 } else {
1448 enum imx_pixfmt_sel fmt_sel =
1449 (incc->cs == IPUV3_COLORSPACE_YUV) ?
1450 PIXFMT_SEL_YUV : PIXFMT_SEL_RGB;
1451
1452 *cc = imx_media_find_ipu_format(sdformat->format.code,
1453 fmt_sel);
1454 if (!*cc) {
1455 imx_media_enum_ipu_formats(&code, 0, fmt_sel);
1456 *cc = imx_media_find_ipu_format(code, fmt_sel);
1457 sdformat->format.code = (*cc)->codes[0];
1458 }
1459 }
1460
1461 csi_try_field(priv, sd_state, sdformat);
1462
1463 /* propagate colorimetry from sink */
1464 sdformat->format.colorspace = infmt->colorspace;
1465 sdformat->format.xfer_func = infmt->xfer_func;
1466 sdformat->format.quantization = infmt->quantization;
1467 sdformat->format.ycbcr_enc = infmt->ycbcr_enc;
1468
1469 break;
1470 case CSI_SINK_PAD:
1471 v4l_bound_align_image(&sdformat->format.width, MIN_W, MAX_W,
1472 W_ALIGN, &sdformat->format.height,
1473 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
1474
1475 *cc = imx_media_find_mbus_format(sdformat->format.code,
1476 PIXFMT_SEL_ANY);
1477 if (!*cc) {
1478 imx_media_enum_mbus_formats(&code, 0,
1479 PIXFMT_SEL_YUV_RGB);
1480 *cc = imx_media_find_mbus_format(code,
1481 PIXFMT_SEL_YUV_RGB);
1482 sdformat->format.code = (*cc)->codes[0];
1483 }
1484
1485 csi_try_field(priv, sd_state, sdformat);
1486
1487 /* Reset crop and compose rectangles */
1488 crop->left = 0;
1489 crop->top = 0;
1490 crop->width = sdformat->format.width;
1491 crop->height = sdformat->format.height;
1492 if (sdformat->format.field == V4L2_FIELD_ALTERNATE)
1493 crop->height *= 2;
1494 csi_try_crop(priv, crop, sd_state, &sdformat->format,
1495 upstream_ep);
1496 compose->left = 0;
1497 compose->top = 0;
1498 compose->width = crop->width;
1499 compose->height = crop->height;
1500
1501 break;
1502 }
1503
1504 imx_media_try_colorimetry(&sdformat->format,
1505 priv->active_output_pad == CSI_SRC_PAD_DIRECT);
1506 }
1507
csi_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * sdformat)1508 static int csi_set_fmt(struct v4l2_subdev *sd,
1509 struct v4l2_subdev_state *sd_state,
1510 struct v4l2_subdev_format *sdformat)
1511 {
1512 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1513 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 };
1514 const struct imx_media_pixfmt *cc;
1515 struct v4l2_mbus_framefmt *fmt;
1516 struct v4l2_rect *crop, *compose;
1517 int ret;
1518
1519 if (sdformat->pad >= CSI_NUM_PADS)
1520 return -EINVAL;
1521
1522 ret = csi_get_upstream_endpoint(priv, &upstream_ep);
1523 if (ret) {
1524 v4l2_err(&priv->sd, "failed to find upstream endpoint\n");
1525 return ret;
1526 }
1527
1528 mutex_lock(&priv->lock);
1529
1530 if (priv->stream_count > 0) {
1531 ret = -EBUSY;
1532 goto out;
1533 }
1534
1535 crop = __csi_get_crop(priv, sd_state, sdformat->which);
1536 compose = __csi_get_compose(priv, sd_state, sdformat->which);
1537
1538 csi_try_fmt(priv, &upstream_ep, sd_state, sdformat, crop, compose,
1539 &cc);
1540
1541 fmt = __csi_get_fmt(priv, sd_state, sdformat->pad, sdformat->which);
1542 *fmt = sdformat->format;
1543
1544 if (sdformat->pad == CSI_SINK_PAD) {
1545 int pad;
1546
1547 /* propagate format to source pads */
1548 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) {
1549 const struct imx_media_pixfmt *outcc;
1550 struct v4l2_mbus_framefmt *outfmt;
1551 struct v4l2_subdev_format format;
1552
1553 format.pad = pad;
1554 format.which = sdformat->which;
1555 format.format = sdformat->format;
1556 csi_try_fmt(priv, &upstream_ep, sd_state, &format,
1557 NULL, compose, &outcc);
1558
1559 outfmt = __csi_get_fmt(priv, sd_state, pad,
1560 sdformat->which);
1561 *outfmt = format.format;
1562
1563 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
1564 priv->cc[pad] = outcc;
1565 }
1566 }
1567
1568 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
1569 priv->cc[sdformat->pad] = cc;
1570
1571 out:
1572 mutex_unlock(&priv->lock);
1573 return ret;
1574 }
1575
csi_get_selection(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_selection * sel)1576 static int csi_get_selection(struct v4l2_subdev *sd,
1577 struct v4l2_subdev_state *sd_state,
1578 struct v4l2_subdev_selection *sel)
1579 {
1580 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1581 struct v4l2_mbus_framefmt *infmt;
1582 struct v4l2_rect *crop, *compose;
1583 int ret = 0;
1584
1585 if (sel->pad != CSI_SINK_PAD)
1586 return -EINVAL;
1587
1588 mutex_lock(&priv->lock);
1589
1590 infmt = __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, sel->which);
1591 crop = __csi_get_crop(priv, sd_state, sel->which);
1592 compose = __csi_get_compose(priv, sd_state, sel->which);
1593
1594 switch (sel->target) {
1595 case V4L2_SEL_TGT_CROP_BOUNDS:
1596 sel->r.left = 0;
1597 sel->r.top = 0;
1598 sel->r.width = infmt->width;
1599 sel->r.height = infmt->height;
1600 if (infmt->field == V4L2_FIELD_ALTERNATE)
1601 sel->r.height *= 2;
1602 break;
1603 case V4L2_SEL_TGT_CROP:
1604 sel->r = *crop;
1605 break;
1606 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
1607 sel->r.left = 0;
1608 sel->r.top = 0;
1609 sel->r.width = crop->width;
1610 sel->r.height = crop->height;
1611 break;
1612 case V4L2_SEL_TGT_COMPOSE:
1613 sel->r = *compose;
1614 break;
1615 default:
1616 ret = -EINVAL;
1617 }
1618
1619 mutex_unlock(&priv->lock);
1620 return ret;
1621 }
1622
csi_set_scale(u32 * compose,u32 crop,u32 flags)1623 static int csi_set_scale(u32 *compose, u32 crop, u32 flags)
1624 {
1625 if ((flags & (V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE)) ==
1626 (V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE) &&
1627 *compose != crop && *compose != crop / 2)
1628 return -ERANGE;
1629
1630 if (*compose <= crop / 2 ||
1631 (*compose < crop * 3 / 4 && !(flags & V4L2_SEL_FLAG_GE)) ||
1632 (*compose < crop && (flags & V4L2_SEL_FLAG_LE)))
1633 *compose = crop / 2;
1634 else
1635 *compose = crop;
1636
1637 return 0;
1638 }
1639
csi_set_selection(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_selection * sel)1640 static int csi_set_selection(struct v4l2_subdev *sd,
1641 struct v4l2_subdev_state *sd_state,
1642 struct v4l2_subdev_selection *sel)
1643 {
1644 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1645 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 };
1646 struct v4l2_mbus_framefmt *infmt;
1647 struct v4l2_rect *crop, *compose;
1648 int pad, ret;
1649
1650 if (sel->pad != CSI_SINK_PAD)
1651 return -EINVAL;
1652
1653 ret = csi_get_upstream_endpoint(priv, &upstream_ep);
1654 if (ret) {
1655 v4l2_err(&priv->sd, "failed to find upstream endpoint\n");
1656 return ret;
1657 }
1658
1659 mutex_lock(&priv->lock);
1660
1661 if (priv->stream_count > 0) {
1662 ret = -EBUSY;
1663 goto out;
1664 }
1665
1666 infmt = __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, sel->which);
1667 crop = __csi_get_crop(priv, sd_state, sel->which);
1668 compose = __csi_get_compose(priv, sd_state, sel->which);
1669
1670 switch (sel->target) {
1671 case V4L2_SEL_TGT_CROP:
1672 /*
1673 * Modifying the crop rectangle always changes the format on
1674 * the source pads. If the KEEP_CONFIG flag is set, just return
1675 * the current crop rectangle.
1676 */
1677 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) {
1678 sel->r = priv->crop;
1679 if (sel->which == V4L2_SUBDEV_FORMAT_TRY)
1680 *crop = sel->r;
1681 goto out;
1682 }
1683
1684 csi_try_crop(priv, &sel->r, sd_state, infmt, &upstream_ep);
1685
1686 *crop = sel->r;
1687
1688 /* Reset scaling to 1:1 */
1689 compose->width = crop->width;
1690 compose->height = crop->height;
1691 break;
1692 case V4L2_SEL_TGT_COMPOSE:
1693 /*
1694 * Modifying the compose rectangle always changes the format on
1695 * the source pads. If the KEEP_CONFIG flag is set, just return
1696 * the current compose rectangle.
1697 */
1698 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) {
1699 sel->r = priv->compose;
1700 if (sel->which == V4L2_SUBDEV_FORMAT_TRY)
1701 *compose = sel->r;
1702 goto out;
1703 }
1704
1705 sel->r.left = 0;
1706 sel->r.top = 0;
1707 ret = csi_set_scale(&sel->r.width, crop->width, sel->flags);
1708 if (ret)
1709 goto out;
1710 ret = csi_set_scale(&sel->r.height, crop->height, sel->flags);
1711 if (ret)
1712 goto out;
1713
1714 *compose = sel->r;
1715 break;
1716 default:
1717 ret = -EINVAL;
1718 goto out;
1719 }
1720
1721 /* Reset source pads to sink compose rectangle */
1722 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) {
1723 struct v4l2_mbus_framefmt *outfmt;
1724
1725 outfmt = __csi_get_fmt(priv, sd_state, pad, sel->which);
1726 outfmt->width = compose->width;
1727 outfmt->height = compose->height;
1728 }
1729
1730 out:
1731 mutex_unlock(&priv->lock);
1732 return ret;
1733 }
1734
csi_subscribe_event(struct v4l2_subdev * sd,struct v4l2_fh * fh,struct v4l2_event_subscription * sub)1735 static int csi_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
1736 struct v4l2_event_subscription *sub)
1737 {
1738 if (sub->type != V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR)
1739 return -EINVAL;
1740 if (sub->id != 0)
1741 return -EINVAL;
1742
1743 return v4l2_event_subscribe(fh, sub, 0, NULL);
1744 }
1745
csi_unsubscribe_event(struct v4l2_subdev * sd,struct v4l2_fh * fh,struct v4l2_event_subscription * sub)1746 static int csi_unsubscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
1747 struct v4l2_event_subscription *sub)
1748 {
1749 return v4l2_event_unsubscribe(fh, sub);
1750 }
1751
csi_registered(struct v4l2_subdev * sd)1752 static int csi_registered(struct v4l2_subdev *sd)
1753 {
1754 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1755 struct ipu_csi *csi;
1756 int i, ret;
1757 u32 code;
1758
1759 /* get handle to IPU CSI */
1760 csi = ipu_csi_get(priv->ipu, priv->csi_id);
1761 if (IS_ERR(csi)) {
1762 v4l2_err(&priv->sd, "failed to get CSI%d\n", priv->csi_id);
1763 return PTR_ERR(csi);
1764 }
1765 priv->csi = csi;
1766
1767 for (i = 0; i < CSI_NUM_PADS; i++) {
1768 code = 0;
1769 if (i != CSI_SINK_PAD)
1770 imx_media_enum_ipu_formats(&code, 0, PIXFMT_SEL_YUV);
1771
1772 /* set a default mbus format */
1773 ret = imx_media_init_mbus_fmt(&priv->format_mbus[i],
1774 IMX_MEDIA_DEF_PIX_WIDTH,
1775 IMX_MEDIA_DEF_PIX_HEIGHT, code,
1776 V4L2_FIELD_NONE, &priv->cc[i]);
1777 if (ret)
1778 goto put_csi;
1779
1780 /* init default frame interval */
1781 priv->frame_interval[i].numerator = 1;
1782 priv->frame_interval[i].denominator = 30;
1783 }
1784
1785 /* disable frame skipping */
1786 priv->skip = &csi_skip[0];
1787
1788 /* init default crop and compose rectangle sizes */
1789 priv->crop.width = IMX_MEDIA_DEF_PIX_WIDTH;
1790 priv->crop.height = IMX_MEDIA_DEF_PIX_HEIGHT;
1791 priv->compose.width = IMX_MEDIA_DEF_PIX_WIDTH;
1792 priv->compose.height = IMX_MEDIA_DEF_PIX_HEIGHT;
1793
1794 priv->fim = imx_media_fim_init(&priv->sd);
1795 if (IS_ERR(priv->fim)) {
1796 ret = PTR_ERR(priv->fim);
1797 goto put_csi;
1798 }
1799
1800 priv->vdev = imx_media_capture_device_init(priv->sd.dev, &priv->sd,
1801 CSI_SRC_PAD_IDMAC, true);
1802 if (IS_ERR(priv->vdev)) {
1803 ret = PTR_ERR(priv->vdev);
1804 goto free_fim;
1805 }
1806
1807 ret = imx_media_capture_device_register(priv->vdev, 0);
1808 if (ret)
1809 goto remove_vdev;
1810
1811 return 0;
1812
1813 remove_vdev:
1814 imx_media_capture_device_remove(priv->vdev);
1815 free_fim:
1816 if (priv->fim)
1817 imx_media_fim_free(priv->fim);
1818 put_csi:
1819 ipu_csi_put(priv->csi);
1820 return ret;
1821 }
1822
csi_unregistered(struct v4l2_subdev * sd)1823 static void csi_unregistered(struct v4l2_subdev *sd)
1824 {
1825 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1826
1827 imx_media_capture_device_unregister(priv->vdev);
1828 imx_media_capture_device_remove(priv->vdev);
1829
1830 if (priv->fim)
1831 imx_media_fim_free(priv->fim);
1832
1833 if (priv->csi)
1834 ipu_csi_put(priv->csi);
1835 }
1836
1837 /*
1838 * The CSI has only one fwnode endpoint, at the sink pad. Verify the
1839 * endpoint belongs to us, and return CSI_SINK_PAD.
1840 */
csi_get_fwnode_pad(struct media_entity * entity,struct fwnode_endpoint * endpoint)1841 static int csi_get_fwnode_pad(struct media_entity *entity,
1842 struct fwnode_endpoint *endpoint)
1843 {
1844 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
1845 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1846 struct fwnode_handle *csi_port = dev_fwnode(priv->dev);
1847 struct fwnode_handle *csi_ep;
1848 int ret;
1849
1850 csi_ep = fwnode_get_next_child_node(csi_port, NULL);
1851
1852 ret = endpoint->local_fwnode == csi_ep ? CSI_SINK_PAD : -ENXIO;
1853
1854 fwnode_handle_put(csi_ep);
1855
1856 return ret;
1857 }
1858
1859 static const struct media_entity_operations csi_entity_ops = {
1860 .link_setup = csi_link_setup,
1861 .link_validate = v4l2_subdev_link_validate,
1862 .get_fwnode_pad = csi_get_fwnode_pad,
1863 };
1864
1865 static const struct v4l2_subdev_core_ops csi_core_ops = {
1866 .subscribe_event = csi_subscribe_event,
1867 .unsubscribe_event = csi_unsubscribe_event,
1868 };
1869
1870 static const struct v4l2_subdev_video_ops csi_video_ops = {
1871 .g_frame_interval = csi_g_frame_interval,
1872 .s_frame_interval = csi_s_frame_interval,
1873 .s_stream = csi_s_stream,
1874 };
1875
1876 static const struct v4l2_subdev_pad_ops csi_pad_ops = {
1877 .init_cfg = imx_media_init_cfg,
1878 .enum_mbus_code = csi_enum_mbus_code,
1879 .enum_frame_size = csi_enum_frame_size,
1880 .enum_frame_interval = csi_enum_frame_interval,
1881 .get_fmt = csi_get_fmt,
1882 .set_fmt = csi_set_fmt,
1883 .get_selection = csi_get_selection,
1884 .set_selection = csi_set_selection,
1885 .link_validate = csi_link_validate,
1886 };
1887
1888 static const struct v4l2_subdev_ops csi_subdev_ops = {
1889 .core = &csi_core_ops,
1890 .video = &csi_video_ops,
1891 .pad = &csi_pad_ops,
1892 };
1893
1894 static const struct v4l2_subdev_internal_ops csi_internal_ops = {
1895 .registered = csi_registered,
1896 .unregistered = csi_unregistered,
1897 };
1898
imx_csi_notify_bound(struct v4l2_async_notifier * notifier,struct v4l2_subdev * sd,struct v4l2_async_subdev * asd)1899 static int imx_csi_notify_bound(struct v4l2_async_notifier *notifier,
1900 struct v4l2_subdev *sd,
1901 struct v4l2_async_subdev *asd)
1902 {
1903 struct csi_priv *priv = notifier_to_dev(notifier);
1904 struct media_pad *sink = &priv->sd.entity.pads[CSI_SINK_PAD];
1905
1906 /*
1907 * If the subdev is a video mux, it must be one of the CSI
1908 * muxes. Mark it as such via its group id.
1909 */
1910 if (sd->entity.function == MEDIA_ENT_F_VID_MUX)
1911 sd->grp_id = IMX_MEDIA_GRP_ID_CSI_MUX;
1912
1913 return v4l2_create_fwnode_links_to_pad(sd, sink, 0);
1914 }
1915
1916 static const struct v4l2_async_notifier_operations csi_notify_ops = {
1917 .bound = imx_csi_notify_bound,
1918 };
1919
imx_csi_async_register(struct csi_priv * priv)1920 static int imx_csi_async_register(struct csi_priv *priv)
1921 {
1922 struct v4l2_async_subdev *asd = NULL;
1923 struct fwnode_handle *ep;
1924 unsigned int port;
1925 int ret;
1926
1927 v4l2_async_notifier_init(&priv->notifier);
1928
1929 /* get this CSI's port id */
1930 ret = fwnode_property_read_u32(dev_fwnode(priv->dev), "reg", &port);
1931 if (ret < 0)
1932 return ret;
1933
1934 ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(priv->dev->parent),
1935 port, 0,
1936 FWNODE_GRAPH_ENDPOINT_NEXT);
1937 if (ep) {
1938 asd = v4l2_async_notifier_add_fwnode_remote_subdev(
1939 &priv->notifier, ep, struct v4l2_async_subdev);
1940
1941 fwnode_handle_put(ep);
1942
1943 if (IS_ERR(asd)) {
1944 ret = PTR_ERR(asd);
1945 /* OK if asd already exists */
1946 if (ret != -EEXIST)
1947 return ret;
1948 }
1949 }
1950
1951 priv->notifier.ops = &csi_notify_ops;
1952
1953 ret = v4l2_async_subdev_notifier_register(&priv->sd,
1954 &priv->notifier);
1955 if (ret)
1956 return ret;
1957
1958 return v4l2_async_register_subdev(&priv->sd);
1959 }
1960
imx_csi_probe(struct platform_device * pdev)1961 static int imx_csi_probe(struct platform_device *pdev)
1962 {
1963 struct ipu_client_platformdata *pdata;
1964 struct pinctrl *pinctrl;
1965 struct csi_priv *priv;
1966 int i, ret;
1967
1968 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
1969 if (!priv)
1970 return -ENOMEM;
1971
1972 platform_set_drvdata(pdev, &priv->sd);
1973 priv->dev = &pdev->dev;
1974
1975 ret = dma_set_coherent_mask(priv->dev, DMA_BIT_MASK(32));
1976 if (ret)
1977 return ret;
1978
1979 /* get parent IPU */
1980 priv->ipu = dev_get_drvdata(priv->dev->parent);
1981
1982 /* get our CSI id */
1983 pdata = priv->dev->platform_data;
1984 priv->csi_id = pdata->csi;
1985 priv->smfc_id = (priv->csi_id == 0) ? 0 : 2;
1986
1987 priv->active_output_pad = CSI_SRC_PAD_IDMAC;
1988
1989 timer_setup(&priv->eof_timeout_timer, csi_idmac_eof_timeout, 0);
1990 spin_lock_init(&priv->irqlock);
1991
1992 v4l2_subdev_init(&priv->sd, &csi_subdev_ops);
1993 v4l2_set_subdevdata(&priv->sd, priv);
1994 priv->sd.internal_ops = &csi_internal_ops;
1995 priv->sd.entity.ops = &csi_entity_ops;
1996 priv->sd.entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
1997 priv->sd.dev = &pdev->dev;
1998 priv->sd.fwnode = of_fwnode_handle(pdata->of_node);
1999 priv->sd.owner = THIS_MODULE;
2000 priv->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
2001 priv->sd.grp_id = priv->csi_id ?
2002 IMX_MEDIA_GRP_ID_IPU_CSI1 : IMX_MEDIA_GRP_ID_IPU_CSI0;
2003 imx_media_grp_id_to_sd_name(priv->sd.name, sizeof(priv->sd.name),
2004 priv->sd.grp_id, ipu_get_num(priv->ipu));
2005
2006 for (i = 0; i < CSI_NUM_PADS; i++)
2007 priv->pad[i].flags = (i == CSI_SINK_PAD) ?
2008 MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE;
2009
2010 ret = media_entity_pads_init(&priv->sd.entity, CSI_NUM_PADS,
2011 priv->pad);
2012 if (ret)
2013 return ret;
2014
2015 mutex_init(&priv->lock);
2016
2017 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0);
2018 priv->sd.ctrl_handler = &priv->ctrl_hdlr;
2019
2020 /*
2021 * The IPUv3 driver did not assign an of_node to this
2022 * device. As a result, pinctrl does not automatically
2023 * configure our pin groups, so we need to do that manually
2024 * here, after setting this device's of_node.
2025 */
2026 priv->dev->of_node = pdata->of_node;
2027 pinctrl = devm_pinctrl_get_select_default(priv->dev);
2028 if (IS_ERR(pinctrl)) {
2029 ret = PTR_ERR(pinctrl);
2030 dev_dbg(priv->dev,
2031 "devm_pinctrl_get_select_default() failed: %d\n", ret);
2032 if (ret != -ENODEV)
2033 goto free;
2034 }
2035
2036 ret = imx_csi_async_register(priv);
2037 if (ret)
2038 goto cleanup;
2039
2040 return 0;
2041
2042 cleanup:
2043 v4l2_async_notifier_unregister(&priv->notifier);
2044 v4l2_async_notifier_cleanup(&priv->notifier);
2045 free:
2046 v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
2047 mutex_destroy(&priv->lock);
2048 return ret;
2049 }
2050
imx_csi_remove(struct platform_device * pdev)2051 static int imx_csi_remove(struct platform_device *pdev)
2052 {
2053 struct v4l2_subdev *sd = platform_get_drvdata(pdev);
2054 struct csi_priv *priv = sd_to_dev(sd);
2055
2056 v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
2057 mutex_destroy(&priv->lock);
2058 v4l2_async_notifier_unregister(&priv->notifier);
2059 v4l2_async_notifier_cleanup(&priv->notifier);
2060 v4l2_async_unregister_subdev(sd);
2061 media_entity_cleanup(&sd->entity);
2062
2063 return 0;
2064 }
2065
2066 static const struct platform_device_id imx_csi_ids[] = {
2067 { .name = "imx-ipuv3-csi" },
2068 { },
2069 };
2070 MODULE_DEVICE_TABLE(platform, imx_csi_ids);
2071
2072 static struct platform_driver imx_csi_driver = {
2073 .probe = imx_csi_probe,
2074 .remove = imx_csi_remove,
2075 .id_table = imx_csi_ids,
2076 .driver = {
2077 .name = "imx-ipuv3-csi",
2078 },
2079 };
2080 module_platform_driver(imx_csi_driver);
2081
2082 MODULE_DESCRIPTION("i.MX CSI subdev driver");
2083 MODULE_AUTHOR("Steve Longerbeam <steve_longerbeam@mentor.com>");
2084 MODULE_LICENSE("GPL");
2085 MODULE_ALIAS("platform:imx-ipuv3-csi");
2086