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 /* media bus config of the upstream subdevice CSI is receiving from */
101 struct v4l2_mbus_config mbus_cfg;
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_mbus_config * mbus_cfg)128 static inline bool is_parallel_bus(struct v4l2_mbus_config *mbus_cfg)
129 {
130 return mbus_cfg->type != V4L2_MBUS_CSI2_DPHY;
131 }
132
is_parallel_16bit_bus(struct v4l2_mbus_config * mbus_cfg)133 static inline bool is_parallel_16bit_bus(struct v4l2_mbus_config *mbus_cfg)
134 {
135 return is_parallel_bus(mbus_cfg) && mbus_cfg->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 * - BT.656 and BT.1120 (8/10-bit YUV422) data can always be processed
143 * on-the-fly
144 * - the CSI is receiving from a 16-bit parallel bus, or
145 * - the CSI is receiving from an 8-bit parallel bus and the incoming
146 * media bus format is other than UYVY8_2X8/YUYV8_2X8.
147 */
requires_passthrough(struct v4l2_mbus_config * mbus_cfg,struct v4l2_mbus_framefmt * infmt,const struct imx_media_pixfmt * incc)148 static inline bool requires_passthrough(struct v4l2_mbus_config *mbus_cfg,
149 struct v4l2_mbus_framefmt *infmt,
150 const struct imx_media_pixfmt *incc)
151 {
152 if (mbus_cfg->type == V4L2_MBUS_BT656) // including BT.1120
153 return false;
154
155 return incc->bayer || is_parallel_16bit_bus(mbus_cfg) ||
156 (is_parallel_bus(mbus_cfg) &&
157 infmt->code != MEDIA_BUS_FMT_UYVY8_2X8 &&
158 infmt->code != MEDIA_BUS_FMT_YUYV8_2X8);
159 }
160
161 /*
162 * Queries the media bus config of the upstream entity that provides data to
163 * the CSI. This will either be the entity directly upstream from the CSI-2
164 * receiver, directly upstream from a video mux, or directly upstream from
165 * the CSI itself.
166 */
csi_get_upstream_mbus_config(struct csi_priv * priv,struct v4l2_mbus_config * mbus_cfg)167 static int csi_get_upstream_mbus_config(struct csi_priv *priv,
168 struct v4l2_mbus_config *mbus_cfg)
169 {
170 struct v4l2_subdev *sd, *remote_sd;
171 struct media_pad *remote_pad;
172 int ret;
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 remote_pad = media_entity_remote_pad_unique(&sd->entity,
205 MEDIA_PAD_FL_SOURCE);
206 if (IS_ERR(remote_pad))
207 return PTR_ERR(remote_pad);
208
209 remote_sd = media_entity_to_v4l2_subdev(remote_pad->entity);
210
211 ret = v4l2_subdev_call(remote_sd, pad, get_mbus_config,
212 remote_pad->index, mbus_cfg);
213 if (ret == -ENOIOCTLCMD)
214 v4l2_err(&priv->sd,
215 "entity %s does not implement get_mbus_config()\n",
216 remote_pad->entity->name);
217
218 return ret;
219 }
220
csi_idmac_put_ipu_resources(struct csi_priv * priv)221 static void csi_idmac_put_ipu_resources(struct csi_priv *priv)
222 {
223 if (priv->idmac_ch)
224 ipu_idmac_put(priv->idmac_ch);
225 priv->idmac_ch = NULL;
226
227 if (priv->smfc)
228 ipu_smfc_put(priv->smfc);
229 priv->smfc = NULL;
230 }
231
csi_idmac_get_ipu_resources(struct csi_priv * priv)232 static int csi_idmac_get_ipu_resources(struct csi_priv *priv)
233 {
234 int ch_num, ret;
235 struct ipu_smfc *smfc;
236 struct ipuv3_channel *idmac_ch;
237
238 ch_num = IPUV3_CHANNEL_CSI0 + priv->smfc_id;
239
240 smfc = ipu_smfc_get(priv->ipu, ch_num);
241 if (IS_ERR(smfc)) {
242 v4l2_err(&priv->sd, "failed to get SMFC\n");
243 ret = PTR_ERR(smfc);
244 goto out;
245 }
246 priv->smfc = smfc;
247
248 idmac_ch = ipu_idmac_get(priv->ipu, ch_num);
249 if (IS_ERR(idmac_ch)) {
250 v4l2_err(&priv->sd, "could not get IDMAC channel %u\n",
251 ch_num);
252 ret = PTR_ERR(idmac_ch);
253 goto out;
254 }
255 priv->idmac_ch = idmac_ch;
256
257 return 0;
258 out:
259 csi_idmac_put_ipu_resources(priv);
260 return ret;
261 }
262
csi_vb2_buf_done(struct csi_priv * priv)263 static void csi_vb2_buf_done(struct csi_priv *priv)
264 {
265 struct imx_media_video_dev *vdev = priv->vdev;
266 struct imx_media_buffer *done, *next;
267 struct vb2_buffer *vb;
268 dma_addr_t phys;
269
270 done = priv->active_vb2_buf[priv->ipu_buf_num];
271 if (done) {
272 done->vbuf.field = vdev->fmt.field;
273 done->vbuf.sequence = priv->frame_sequence;
274 vb = &done->vbuf.vb2_buf;
275 vb->timestamp = ktime_get_ns();
276 vb2_buffer_done(vb, priv->nfb4eof ?
277 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
278 }
279
280 priv->frame_sequence++;
281 priv->nfb4eof = false;
282
283 /* get next queued buffer */
284 next = imx_media_capture_device_next_buf(vdev);
285 if (next) {
286 phys = vb2_dma_contig_plane_dma_addr(&next->vbuf.vb2_buf, 0);
287 priv->active_vb2_buf[priv->ipu_buf_num] = next;
288 } else {
289 phys = priv->underrun_buf.phys;
290 priv->active_vb2_buf[priv->ipu_buf_num] = NULL;
291 }
292
293 if (ipu_idmac_buffer_is_ready(priv->idmac_ch, priv->ipu_buf_num))
294 ipu_idmac_clear_buffer(priv->idmac_ch, priv->ipu_buf_num);
295
296 if (priv->interweave_swap)
297 phys += vdev->fmt.bytesperline;
298
299 ipu_cpmem_set_buffer(priv->idmac_ch, priv->ipu_buf_num, phys);
300 }
301
csi_idmac_eof_interrupt(int irq,void * dev_id)302 static irqreturn_t csi_idmac_eof_interrupt(int irq, void *dev_id)
303 {
304 struct csi_priv *priv = dev_id;
305
306 spin_lock(&priv->irqlock);
307
308 if (priv->last_eof) {
309 complete(&priv->last_eof_comp);
310 priv->last_eof = false;
311 goto unlock;
312 }
313
314 if (priv->fim)
315 /* call frame interval monitor */
316 imx_media_fim_eof_monitor(priv->fim, ktime_get());
317
318 csi_vb2_buf_done(priv);
319
320 /* select new IPU buf */
321 ipu_idmac_select_buffer(priv->idmac_ch, priv->ipu_buf_num);
322 /* toggle IPU double-buffer index */
323 priv->ipu_buf_num ^= 1;
324
325 /* bump the EOF timeout timer */
326 mod_timer(&priv->eof_timeout_timer,
327 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT));
328
329 unlock:
330 spin_unlock(&priv->irqlock);
331 return IRQ_HANDLED;
332 }
333
csi_idmac_nfb4eof_interrupt(int irq,void * dev_id)334 static irqreturn_t csi_idmac_nfb4eof_interrupt(int irq, void *dev_id)
335 {
336 struct csi_priv *priv = dev_id;
337
338 spin_lock(&priv->irqlock);
339
340 /*
341 * this is not an unrecoverable error, just mark
342 * the next captured frame with vb2 error flag.
343 */
344 priv->nfb4eof = true;
345
346 v4l2_err(&priv->sd, "NFB4EOF\n");
347
348 spin_unlock(&priv->irqlock);
349
350 return IRQ_HANDLED;
351 }
352
353 /*
354 * EOF timeout timer function. This is an unrecoverable condition
355 * without a stream restart.
356 */
csi_idmac_eof_timeout(struct timer_list * t)357 static void csi_idmac_eof_timeout(struct timer_list *t)
358 {
359 struct csi_priv *priv = from_timer(priv, t, eof_timeout_timer);
360 struct imx_media_video_dev *vdev = priv->vdev;
361
362 v4l2_err(&priv->sd, "EOF timeout\n");
363
364 /* signal a fatal error to capture device */
365 imx_media_capture_device_error(vdev);
366 }
367
csi_idmac_setup_vb2_buf(struct csi_priv * priv,dma_addr_t * phys)368 static void csi_idmac_setup_vb2_buf(struct csi_priv *priv, dma_addr_t *phys)
369 {
370 struct imx_media_video_dev *vdev = priv->vdev;
371 struct imx_media_buffer *buf;
372 int i;
373
374 for (i = 0; i < 2; i++) {
375 buf = imx_media_capture_device_next_buf(vdev);
376 if (buf) {
377 priv->active_vb2_buf[i] = buf;
378 phys[i] = vb2_dma_contig_plane_dma_addr(
379 &buf->vbuf.vb2_buf, 0);
380 } else {
381 priv->active_vb2_buf[i] = NULL;
382 phys[i] = priv->underrun_buf.phys;
383 }
384 }
385 }
386
csi_idmac_unsetup_vb2_buf(struct csi_priv * priv,enum vb2_buffer_state return_status)387 static void csi_idmac_unsetup_vb2_buf(struct csi_priv *priv,
388 enum vb2_buffer_state return_status)
389 {
390 struct imx_media_buffer *buf;
391 int i;
392
393 /* return any remaining active frames with return_status */
394 for (i = 0; i < 2; i++) {
395 buf = priv->active_vb2_buf[i];
396 if (buf) {
397 struct vb2_buffer *vb = &buf->vbuf.vb2_buf;
398
399 vb->timestamp = ktime_get_ns();
400 vb2_buffer_done(vb, return_status);
401 }
402 }
403 }
404
405 /* init the SMFC IDMAC channel */
csi_idmac_setup_channel(struct csi_priv * priv)406 static int csi_idmac_setup_channel(struct csi_priv *priv)
407 {
408 struct imx_media_video_dev *vdev = priv->vdev;
409 const struct imx_media_pixfmt *incc;
410 struct v4l2_mbus_framefmt *infmt;
411 struct v4l2_mbus_framefmt *outfmt;
412 bool passthrough, interweave;
413 struct ipu_image image;
414 u32 passthrough_bits;
415 u32 passthrough_cycles;
416 dma_addr_t phys[2];
417 u32 burst_size;
418 int ret;
419
420 infmt = &priv->format_mbus[CSI_SINK_PAD];
421 incc = priv->cc[CSI_SINK_PAD];
422 outfmt = &priv->format_mbus[CSI_SRC_PAD_IDMAC];
423
424 ipu_cpmem_zero(priv->idmac_ch);
425
426 memset(&image, 0, sizeof(image));
427 image.pix = vdev->fmt;
428 image.rect = vdev->compose;
429
430 csi_idmac_setup_vb2_buf(priv, phys);
431
432 image.phys0 = phys[0];
433 image.phys1 = phys[1];
434
435 passthrough = requires_passthrough(&priv->mbus_cfg, infmt, incc);
436 passthrough_cycles = 1;
437
438 /*
439 * If the field type at capture interface is interlaced, and
440 * the output IDMAC pad is sequential, enable interweave at
441 * the IDMAC output channel.
442 */
443 interweave = V4L2_FIELD_IS_INTERLACED(image.pix.field) &&
444 V4L2_FIELD_IS_SEQUENTIAL(outfmt->field);
445 priv->interweave_swap = interweave &&
446 image.pix.field == V4L2_FIELD_INTERLACED_BT;
447
448 switch (image.pix.pixelformat) {
449 case V4L2_PIX_FMT_SBGGR8:
450 case V4L2_PIX_FMT_SGBRG8:
451 case V4L2_PIX_FMT_SGRBG8:
452 case V4L2_PIX_FMT_SRGGB8:
453 case V4L2_PIX_FMT_GREY:
454 burst_size = 16;
455 passthrough_bits = 8;
456 break;
457 case V4L2_PIX_FMT_SBGGR16:
458 case V4L2_PIX_FMT_SGBRG16:
459 case V4L2_PIX_FMT_SGRBG16:
460 case V4L2_PIX_FMT_SRGGB16:
461 case V4L2_PIX_FMT_Y10:
462 case V4L2_PIX_FMT_Y12:
463 burst_size = 8;
464 passthrough_bits = 16;
465 break;
466 case V4L2_PIX_FMT_YUV420:
467 case V4L2_PIX_FMT_YVU420:
468 case V4L2_PIX_FMT_NV12:
469 burst_size = (image.pix.width & 0x3f) ?
470 ((image.pix.width & 0x1f) ?
471 ((image.pix.width & 0xf) ? 8 : 16) : 32) : 64;
472 passthrough_bits = 16;
473 /*
474 * Skip writing U and V components to odd rows (but not
475 * when enabling IDMAC interweaving, they are incompatible).
476 */
477 if (!interweave)
478 ipu_cpmem_skip_odd_chroma_rows(priv->idmac_ch);
479 break;
480 case V4L2_PIX_FMT_YUYV:
481 case V4L2_PIX_FMT_UYVY:
482 burst_size = (image.pix.width & 0x1f) ?
483 ((image.pix.width & 0xf) ? 8 : 16) : 32;
484 passthrough_bits = 16;
485 break;
486 case V4L2_PIX_FMT_RGB565:
487 if (passthrough) {
488 burst_size = 16;
489 passthrough_bits = 8;
490 passthrough_cycles = incc->cycles;
491 break;
492 }
493 fallthrough; /* non-passthrough RGB565 (CSI-2 bus) */
494 default:
495 burst_size = (image.pix.width & 0xf) ? 8 : 16;
496 passthrough_bits = 16;
497 break;
498 }
499
500 if (passthrough) {
501 if (priv->interweave_swap) {
502 /* start interweave scan at 1st top line (2nd line) */
503 image.phys0 += image.pix.bytesperline;
504 image.phys1 += image.pix.bytesperline;
505 }
506
507 ipu_cpmem_set_resolution(priv->idmac_ch,
508 image.rect.width * passthrough_cycles,
509 image.rect.height);
510 ipu_cpmem_set_stride(priv->idmac_ch, image.pix.bytesperline);
511 ipu_cpmem_set_buffer(priv->idmac_ch, 0, image.phys0);
512 ipu_cpmem_set_buffer(priv->idmac_ch, 1, image.phys1);
513 ipu_cpmem_set_format_passthrough(priv->idmac_ch,
514 passthrough_bits);
515 } else {
516 if (priv->interweave_swap) {
517 /* start interweave scan at 1st top line (2nd line) */
518 image.rect.top = 1;
519 }
520
521 ret = ipu_cpmem_set_image(priv->idmac_ch, &image);
522 if (ret)
523 goto unsetup_vb2;
524 }
525
526 ipu_cpmem_set_burstsize(priv->idmac_ch, burst_size);
527
528 /*
529 * Set the channel for the direct CSI-->memory via SMFC
530 * use-case to very high priority, by enabling the watermark
531 * signal in the SMFC, enabling WM in the channel, and setting
532 * the channel priority to high.
533 *
534 * Refer to the i.mx6 rev. D TRM Table 36-8: Calculated priority
535 * value.
536 *
537 * The WM's are set very low by intention here to ensure that
538 * the SMFC FIFOs do not overflow.
539 */
540 ipu_smfc_set_watermark(priv->smfc, 0x02, 0x01);
541 ipu_cpmem_set_high_priority(priv->idmac_ch);
542 ipu_idmac_enable_watermark(priv->idmac_ch, true);
543 ipu_cpmem_set_axi_id(priv->idmac_ch, 0);
544
545 burst_size = passthrough ?
546 (burst_size >> 3) - 1 : (burst_size >> 2) - 1;
547
548 ipu_smfc_set_burstsize(priv->smfc, burst_size);
549
550 if (interweave)
551 ipu_cpmem_interlaced_scan(priv->idmac_ch,
552 priv->interweave_swap ?
553 -image.pix.bytesperline :
554 image.pix.bytesperline,
555 image.pix.pixelformat);
556
557 ipu_idmac_set_double_buffer(priv->idmac_ch, true);
558
559 return 0;
560
561 unsetup_vb2:
562 csi_idmac_unsetup_vb2_buf(priv, VB2_BUF_STATE_QUEUED);
563 return ret;
564 }
565
csi_idmac_unsetup(struct csi_priv * priv,enum vb2_buffer_state state)566 static void csi_idmac_unsetup(struct csi_priv *priv,
567 enum vb2_buffer_state state)
568 {
569 ipu_idmac_disable_channel(priv->idmac_ch);
570 ipu_smfc_disable(priv->smfc);
571
572 csi_idmac_unsetup_vb2_buf(priv, state);
573 }
574
csi_idmac_setup(struct csi_priv * priv)575 static int csi_idmac_setup(struct csi_priv *priv)
576 {
577 int ret;
578
579 ret = csi_idmac_setup_channel(priv);
580 if (ret)
581 return ret;
582
583 ipu_cpmem_dump(priv->idmac_ch);
584 ipu_dump(priv->ipu);
585
586 ipu_smfc_enable(priv->smfc);
587
588 /* set buffers ready */
589 ipu_idmac_select_buffer(priv->idmac_ch, 0);
590 ipu_idmac_select_buffer(priv->idmac_ch, 1);
591
592 /* enable the channels */
593 ipu_idmac_enable_channel(priv->idmac_ch);
594
595 return 0;
596 }
597
csi_idmac_start(struct csi_priv * priv)598 static int csi_idmac_start(struct csi_priv *priv)
599 {
600 struct imx_media_video_dev *vdev = priv->vdev;
601 int ret;
602
603 ret = csi_idmac_get_ipu_resources(priv);
604 if (ret)
605 return ret;
606
607 ipu_smfc_map_channel(priv->smfc, priv->csi_id, priv->vc_num);
608
609 ret = imx_media_alloc_dma_buf(priv->dev, &priv->underrun_buf,
610 vdev->fmt.sizeimage);
611 if (ret)
612 goto out_put_ipu;
613
614 priv->ipu_buf_num = 0;
615
616 /* init EOF completion waitq */
617 init_completion(&priv->last_eof_comp);
618 priv->frame_sequence = 0;
619 priv->last_eof = false;
620 priv->nfb4eof = false;
621
622 ret = csi_idmac_setup(priv);
623 if (ret) {
624 v4l2_err(&priv->sd, "csi_idmac_setup failed: %d\n", ret);
625 goto out_free_dma_buf;
626 }
627
628 priv->nfb4eof_irq = ipu_idmac_channel_irq(priv->ipu,
629 priv->idmac_ch,
630 IPU_IRQ_NFB4EOF);
631 ret = devm_request_irq(priv->dev, priv->nfb4eof_irq,
632 csi_idmac_nfb4eof_interrupt, 0,
633 "imx-smfc-nfb4eof", priv);
634 if (ret) {
635 v4l2_err(&priv->sd,
636 "Error registering NFB4EOF irq: %d\n", ret);
637 goto out_unsetup;
638 }
639
640 priv->eof_irq = ipu_idmac_channel_irq(priv->ipu, priv->idmac_ch,
641 IPU_IRQ_EOF);
642
643 ret = devm_request_irq(priv->dev, priv->eof_irq,
644 csi_idmac_eof_interrupt, 0,
645 "imx-smfc-eof", priv);
646 if (ret) {
647 v4l2_err(&priv->sd,
648 "Error registering eof irq: %d\n", ret);
649 goto out_free_nfb4eof_irq;
650 }
651
652 /* start the EOF timeout timer */
653 mod_timer(&priv->eof_timeout_timer,
654 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT));
655
656 return 0;
657
658 out_free_nfb4eof_irq:
659 devm_free_irq(priv->dev, priv->nfb4eof_irq, priv);
660 out_unsetup:
661 csi_idmac_unsetup(priv, VB2_BUF_STATE_QUEUED);
662 out_free_dma_buf:
663 imx_media_free_dma_buf(priv->dev, &priv->underrun_buf);
664 out_put_ipu:
665 csi_idmac_put_ipu_resources(priv);
666 return ret;
667 }
668
csi_idmac_wait_last_eof(struct csi_priv * priv)669 static void csi_idmac_wait_last_eof(struct csi_priv *priv)
670 {
671 unsigned long flags;
672 int ret;
673
674 /* mark next EOF interrupt as the last before stream off */
675 spin_lock_irqsave(&priv->irqlock, flags);
676 priv->last_eof = true;
677 spin_unlock_irqrestore(&priv->irqlock, flags);
678
679 /*
680 * and then wait for interrupt handler to mark completion.
681 */
682 ret = wait_for_completion_timeout(
683 &priv->last_eof_comp, msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT));
684 if (ret == 0)
685 v4l2_warn(&priv->sd, "wait last EOF timeout\n");
686 }
687
csi_idmac_stop(struct csi_priv * priv)688 static void csi_idmac_stop(struct csi_priv *priv)
689 {
690 devm_free_irq(priv->dev, priv->eof_irq, priv);
691 devm_free_irq(priv->dev, priv->nfb4eof_irq, priv);
692
693 csi_idmac_unsetup(priv, VB2_BUF_STATE_ERROR);
694
695 imx_media_free_dma_buf(priv->dev, &priv->underrun_buf);
696
697 /* cancel the EOF timeout timer */
698 del_timer_sync(&priv->eof_timeout_timer);
699
700 csi_idmac_put_ipu_resources(priv);
701 }
702
703 /* Update the CSI whole sensor and active windows */
csi_setup(struct csi_priv * priv)704 static int csi_setup(struct csi_priv *priv)
705 {
706 struct v4l2_mbus_framefmt *infmt, *outfmt;
707 const struct imx_media_pixfmt *incc;
708 struct v4l2_mbus_framefmt if_fmt;
709 struct v4l2_rect crop;
710
711 infmt = &priv->format_mbus[CSI_SINK_PAD];
712 incc = priv->cc[CSI_SINK_PAD];
713 outfmt = &priv->format_mbus[priv->active_output_pad];
714
715 if_fmt = *infmt;
716 crop = priv->crop;
717
718 /*
719 * if cycles is set, we need to handle this over multiple cycles as
720 * generic/bayer data
721 */
722 if (is_parallel_bus(&priv->mbus_cfg) && incc->cycles) {
723 if_fmt.width *= incc->cycles;
724 crop.width *= incc->cycles;
725 }
726
727 ipu_csi_set_window(priv->csi, &crop);
728
729 ipu_csi_set_downsize(priv->csi,
730 priv->crop.width == 2 * priv->compose.width,
731 priv->crop.height == 2 * priv->compose.height);
732
733 ipu_csi_init_interface(priv->csi, &priv->mbus_cfg, &if_fmt, outfmt);
734
735 ipu_csi_set_dest(priv->csi, priv->dest);
736
737 if (priv->dest == IPU_CSI_DEST_IDMAC)
738 ipu_csi_set_skip_smfc(priv->csi, priv->skip->skip_smfc,
739 priv->skip->max_ratio - 1, 0);
740
741 ipu_csi_dump(priv->csi);
742
743 return 0;
744 }
745
csi_start(struct csi_priv * priv)746 static int csi_start(struct csi_priv *priv)
747 {
748 struct v4l2_fract *input_fi, *output_fi;
749 int ret;
750
751 input_fi = &priv->frame_interval[CSI_SINK_PAD];
752 output_fi = &priv->frame_interval[priv->active_output_pad];
753
754 /* start upstream */
755 ret = v4l2_subdev_call(priv->src_sd, video, s_stream, 1);
756 ret = (ret && ret != -ENOIOCTLCMD) ? ret : 0;
757 if (ret)
758 return ret;
759
760 /* Skip first few frames from a BT.656 source */
761 if (priv->mbus_cfg.type == V4L2_MBUS_BT656) {
762 u32 delay_usec, bad_frames = 20;
763
764 delay_usec = DIV_ROUND_UP_ULL((u64)USEC_PER_SEC *
765 input_fi->numerator * bad_frames,
766 input_fi->denominator);
767
768 usleep_range(delay_usec, delay_usec + 1000);
769 }
770
771 if (priv->dest == IPU_CSI_DEST_IDMAC) {
772 ret = csi_idmac_start(priv);
773 if (ret)
774 goto stop_upstream;
775 }
776
777 ret = csi_setup(priv);
778 if (ret)
779 goto idmac_stop;
780
781 /* start the frame interval monitor */
782 if (priv->fim && priv->dest == IPU_CSI_DEST_IDMAC)
783 imx_media_fim_set_stream(priv->fim, output_fi, true);
784
785 ret = ipu_csi_enable(priv->csi);
786 if (ret) {
787 v4l2_err(&priv->sd, "CSI enable error: %d\n", ret);
788 goto fim_off;
789 }
790
791 return 0;
792
793 fim_off:
794 if (priv->fim && priv->dest == IPU_CSI_DEST_IDMAC)
795 imx_media_fim_set_stream(priv->fim, NULL, false);
796 idmac_stop:
797 if (priv->dest == IPU_CSI_DEST_IDMAC)
798 csi_idmac_stop(priv);
799 stop_upstream:
800 v4l2_subdev_call(priv->src_sd, video, s_stream, 0);
801 return ret;
802 }
803
csi_stop(struct csi_priv * priv)804 static void csi_stop(struct csi_priv *priv)
805 {
806 if (priv->dest == IPU_CSI_DEST_IDMAC)
807 csi_idmac_wait_last_eof(priv);
808
809 /*
810 * Disable the CSI asap, after syncing with the last EOF.
811 * Doing so after the IDMA channel is disabled has shown to
812 * create hard system-wide hangs.
813 */
814 ipu_csi_disable(priv->csi);
815
816 /* stop upstream */
817 v4l2_subdev_call(priv->src_sd, video, s_stream, 0);
818
819 if (priv->dest == IPU_CSI_DEST_IDMAC) {
820 csi_idmac_stop(priv);
821
822 /* stop the frame interval monitor */
823 if (priv->fim)
824 imx_media_fim_set_stream(priv->fim, NULL, false);
825 }
826 }
827
828 static const struct csi_skip_desc csi_skip[12] = {
829 { 1, 1, 0x00 }, /* Keep all frames */
830 { 5, 6, 0x10 }, /* Skip every sixth frame */
831 { 4, 5, 0x08 }, /* Skip every fifth frame */
832 { 3, 4, 0x04 }, /* Skip every fourth frame */
833 { 2, 3, 0x02 }, /* Skip every third frame */
834 { 3, 5, 0x0a }, /* Skip frames 1 and 3 of every 5 */
835 { 1, 2, 0x01 }, /* Skip every second frame */
836 { 2, 5, 0x0b }, /* Keep frames 1 and 4 of every 5 */
837 { 1, 3, 0x03 }, /* Keep one in three frames */
838 { 1, 4, 0x07 }, /* Keep one in four frames */
839 { 1, 5, 0x0f }, /* Keep one in five frames */
840 { 1, 6, 0x1f }, /* Keep one in six frames */
841 };
842
csi_apply_skip_interval(const struct csi_skip_desc * skip,struct v4l2_fract * interval)843 static void csi_apply_skip_interval(const struct csi_skip_desc *skip,
844 struct v4l2_fract *interval)
845 {
846 unsigned int div;
847
848 interval->numerator *= skip->max_ratio;
849 interval->denominator *= skip->keep;
850
851 /* Reduce fraction to lowest terms */
852 div = gcd(interval->numerator, interval->denominator);
853 if (div > 1) {
854 interval->numerator /= div;
855 interval->denominator /= div;
856 }
857 }
858
859 /*
860 * Find the skip pattern to produce the output frame interval closest to the
861 * requested one, for the given input frame interval. Updates the output frame
862 * interval to the exact value.
863 */
csi_find_best_skip(struct v4l2_fract * in,struct v4l2_fract * out)864 static const struct csi_skip_desc *csi_find_best_skip(struct v4l2_fract *in,
865 struct v4l2_fract *out)
866 {
867 const struct csi_skip_desc *skip = &csi_skip[0], *best_skip = skip;
868 u32 min_err = UINT_MAX;
869 u64 want_us;
870 int i;
871
872 /* Default to 1:1 ratio */
873 if (out->numerator == 0 || out->denominator == 0 ||
874 in->numerator == 0 || in->denominator == 0) {
875 *out = *in;
876 return best_skip;
877 }
878
879 want_us = div_u64((u64)USEC_PER_SEC * out->numerator, out->denominator);
880
881 /* Find the reduction closest to the requested time per frame */
882 for (i = 0; i < ARRAY_SIZE(csi_skip); i++, skip++) {
883 u64 tmp, err;
884
885 tmp = div_u64((u64)USEC_PER_SEC * in->numerator *
886 skip->max_ratio, in->denominator * skip->keep);
887
888 err = abs((s64)tmp - want_us);
889 if (err < min_err) {
890 min_err = err;
891 best_skip = skip;
892 }
893 }
894
895 *out = *in;
896 csi_apply_skip_interval(best_skip, out);
897
898 return best_skip;
899 }
900
901 /*
902 * V4L2 subdev operations.
903 */
904
csi_g_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * fi)905 static int csi_g_frame_interval(struct v4l2_subdev *sd,
906 struct v4l2_subdev_frame_interval *fi)
907 {
908 struct csi_priv *priv = v4l2_get_subdevdata(sd);
909
910 if (fi->pad >= CSI_NUM_PADS)
911 return -EINVAL;
912
913 mutex_lock(&priv->lock);
914
915 fi->interval = priv->frame_interval[fi->pad];
916
917 mutex_unlock(&priv->lock);
918
919 return 0;
920 }
921
csi_s_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * fi)922 static int csi_s_frame_interval(struct v4l2_subdev *sd,
923 struct v4l2_subdev_frame_interval *fi)
924 {
925 struct csi_priv *priv = v4l2_get_subdevdata(sd);
926 struct v4l2_fract *input_fi;
927 int ret = 0;
928
929 mutex_lock(&priv->lock);
930
931 input_fi = &priv->frame_interval[CSI_SINK_PAD];
932
933 switch (fi->pad) {
934 case CSI_SINK_PAD:
935 /* No limits on valid input frame intervals */
936 if (fi->interval.numerator == 0 ||
937 fi->interval.denominator == 0)
938 fi->interval = *input_fi;
939 /* Reset output intervals and frame skipping ratio to 1:1 */
940 priv->frame_interval[CSI_SRC_PAD_IDMAC] = fi->interval;
941 priv->frame_interval[CSI_SRC_PAD_DIRECT] = fi->interval;
942 priv->skip = &csi_skip[0];
943 break;
944 case CSI_SRC_PAD_IDMAC:
945 /*
946 * frame interval at IDMAC output pad depends on input
947 * interval, modified by frame skipping.
948 */
949 priv->skip = csi_find_best_skip(input_fi, &fi->interval);
950 break;
951 case CSI_SRC_PAD_DIRECT:
952 /*
953 * frame interval at DIRECT output pad is same as input
954 * interval.
955 */
956 fi->interval = *input_fi;
957 break;
958 default:
959 ret = -EINVAL;
960 goto out;
961 }
962
963 priv->frame_interval[fi->pad] = fi->interval;
964 out:
965 mutex_unlock(&priv->lock);
966 return ret;
967 }
968
csi_s_stream(struct v4l2_subdev * sd,int enable)969 static int csi_s_stream(struct v4l2_subdev *sd, int enable)
970 {
971 struct csi_priv *priv = v4l2_get_subdevdata(sd);
972 int ret = 0;
973
974 mutex_lock(&priv->lock);
975
976 if (!priv->src_sd || !priv->sink) {
977 ret = -EPIPE;
978 goto out;
979 }
980
981 /*
982 * enable/disable streaming only if stream_count is
983 * going from 0 to 1 / 1 to 0.
984 */
985 if (priv->stream_count != !enable)
986 goto update_count;
987
988 if (enable) {
989 dev_dbg(priv->dev, "stream ON\n");
990 ret = csi_start(priv);
991 if (ret)
992 goto out;
993 } else {
994 dev_dbg(priv->dev, "stream OFF\n");
995 csi_stop(priv);
996 }
997
998 update_count:
999 priv->stream_count += enable ? 1 : -1;
1000 if (priv->stream_count < 0)
1001 priv->stream_count = 0;
1002 out:
1003 mutex_unlock(&priv->lock);
1004 return ret;
1005 }
1006
csi_link_setup(struct media_entity * entity,const struct media_pad * local,const struct media_pad * remote,u32 flags)1007 static int csi_link_setup(struct media_entity *entity,
1008 const struct media_pad *local,
1009 const struct media_pad *remote, u32 flags)
1010 {
1011 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
1012 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1013 struct v4l2_subdev *remote_sd;
1014 int ret = 0;
1015
1016 dev_dbg(priv->dev, "link setup %s -> %s\n", remote->entity->name,
1017 local->entity->name);
1018
1019 mutex_lock(&priv->lock);
1020
1021 if (local->flags & MEDIA_PAD_FL_SINK) {
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
1029 if (flags & MEDIA_LNK_FL_ENABLED) {
1030 if (priv->src_sd) {
1031 ret = -EBUSY;
1032 goto out;
1033 }
1034 priv->src_sd = remote_sd;
1035 } else {
1036 priv->src_sd = NULL;
1037 }
1038
1039 goto out;
1040 }
1041
1042 /* this is a source pad */
1043
1044 if (flags & MEDIA_LNK_FL_ENABLED) {
1045 if (priv->sink) {
1046 ret = -EBUSY;
1047 goto out;
1048 }
1049 } else {
1050 v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
1051 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0);
1052 priv->sink = NULL;
1053 /* do not apply IC burst alignment in csi_try_crop */
1054 priv->active_output_pad = CSI_SRC_PAD_IDMAC;
1055 goto out;
1056 }
1057
1058 /* record which output pad is now active */
1059 priv->active_output_pad = local->index;
1060
1061 /* set CSI destination */
1062 if (local->index == CSI_SRC_PAD_IDMAC) {
1063 if (!is_media_entity_v4l2_video_device(remote->entity)) {
1064 ret = -EINVAL;
1065 goto out;
1066 }
1067
1068 if (priv->fim) {
1069 ret = imx_media_fim_add_controls(priv->fim);
1070 if (ret)
1071 goto out;
1072 }
1073
1074 priv->dest = IPU_CSI_DEST_IDMAC;
1075 } else {
1076 if (!is_media_entity_v4l2_subdev(remote->entity)) {
1077 ret = -EINVAL;
1078 goto out;
1079 }
1080
1081 remote_sd = media_entity_to_v4l2_subdev(remote->entity);
1082 switch (remote_sd->grp_id) {
1083 case IMX_MEDIA_GRP_ID_IPU_VDIC:
1084 priv->dest = IPU_CSI_DEST_VDIC;
1085 break;
1086 case IMX_MEDIA_GRP_ID_IPU_IC_PRP:
1087 priv->dest = IPU_CSI_DEST_IC;
1088 break;
1089 default:
1090 ret = -EINVAL;
1091 goto out;
1092 }
1093 }
1094
1095 priv->sink = remote->entity;
1096 out:
1097 mutex_unlock(&priv->lock);
1098 return ret;
1099 }
1100
csi_link_validate(struct v4l2_subdev * sd,struct media_link * link,struct v4l2_subdev_format * source_fmt,struct v4l2_subdev_format * sink_fmt)1101 static int csi_link_validate(struct v4l2_subdev *sd,
1102 struct media_link *link,
1103 struct v4l2_subdev_format *source_fmt,
1104 struct v4l2_subdev_format *sink_fmt)
1105 {
1106 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1107 struct v4l2_mbus_config mbus_cfg = { .type = 0 };
1108 bool is_csi2;
1109 int ret;
1110
1111 ret = v4l2_subdev_link_validate_default(sd, link,
1112 source_fmt, sink_fmt);
1113 if (ret)
1114 return ret;
1115
1116 ret = csi_get_upstream_mbus_config(priv, &mbus_cfg);
1117 if (ret) {
1118 v4l2_err(&priv->sd,
1119 "failed to get upstream media bus configuration\n");
1120 return ret;
1121 }
1122
1123 mutex_lock(&priv->lock);
1124
1125 priv->mbus_cfg = mbus_cfg;
1126 is_csi2 = !is_parallel_bus(&mbus_cfg);
1127 if (is_csi2) {
1128 /*
1129 * NOTE! It seems the virtual channels from the mipi csi-2
1130 * receiver are used only for routing by the video mux's,
1131 * or for hard-wired routing to the CSI's. Once the stream
1132 * enters the CSI's however, they are treated internally
1133 * in the IPU as virtual channel 0.
1134 */
1135 ipu_csi_set_mipi_datatype(priv->csi, 0,
1136 &priv->format_mbus[CSI_SINK_PAD]);
1137 }
1138
1139 /* select either parallel or MIPI-CSI2 as input to CSI */
1140 ipu_set_csi_src_mux(priv->ipu, priv->csi_id, is_csi2);
1141
1142 mutex_unlock(&priv->lock);
1143 return ret;
1144 }
1145
1146 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)1147 __csi_get_fmt(struct csi_priv *priv, struct v4l2_subdev_state *sd_state,
1148 unsigned int pad, enum v4l2_subdev_format_whence which)
1149 {
1150 if (which == V4L2_SUBDEV_FORMAT_TRY)
1151 return v4l2_subdev_get_try_format(&priv->sd, sd_state, pad);
1152 else
1153 return &priv->format_mbus[pad];
1154 }
1155
1156 static struct v4l2_rect *
__csi_get_crop(struct csi_priv * priv,struct v4l2_subdev_state * sd_state,enum v4l2_subdev_format_whence which)1157 __csi_get_crop(struct csi_priv *priv, struct v4l2_subdev_state *sd_state,
1158 enum v4l2_subdev_format_whence which)
1159 {
1160 if (which == V4L2_SUBDEV_FORMAT_TRY)
1161 return v4l2_subdev_get_try_crop(&priv->sd, sd_state,
1162 CSI_SINK_PAD);
1163 else
1164 return &priv->crop;
1165 }
1166
1167 static struct v4l2_rect *
__csi_get_compose(struct csi_priv * priv,struct v4l2_subdev_state * sd_state,enum v4l2_subdev_format_whence which)1168 __csi_get_compose(struct csi_priv *priv, struct v4l2_subdev_state *sd_state,
1169 enum v4l2_subdev_format_whence which)
1170 {
1171 if (which == V4L2_SUBDEV_FORMAT_TRY)
1172 return v4l2_subdev_get_try_compose(&priv->sd, sd_state,
1173 CSI_SINK_PAD);
1174 else
1175 return &priv->compose;
1176 }
1177
csi_try_crop(struct csi_priv * priv,struct v4l2_rect * crop,struct v4l2_subdev_state * sd_state,struct v4l2_mbus_framefmt * infmt,struct v4l2_mbus_config * mbus_cfg)1178 static void csi_try_crop(struct csi_priv *priv,
1179 struct v4l2_rect *crop,
1180 struct v4l2_subdev_state *sd_state,
1181 struct v4l2_mbus_framefmt *infmt,
1182 struct v4l2_mbus_config *mbus_cfg)
1183 {
1184 u32 in_height;
1185
1186 crop->width = min_t(__u32, infmt->width, crop->width);
1187 if (crop->left + crop->width > infmt->width)
1188 crop->left = infmt->width - crop->width;
1189 /* adjust crop left/width to h/w alignment restrictions */
1190 crop->left &= ~0x3;
1191 if (priv->active_output_pad == CSI_SRC_PAD_DIRECT)
1192 crop->width &= ~0x7; /* multiple of 8 pixels (IC burst) */
1193 else
1194 crop->width &= ~0x1; /* multiple of 2 pixels */
1195
1196 in_height = infmt->height;
1197 if (infmt->field == V4L2_FIELD_ALTERNATE)
1198 in_height *= 2;
1199
1200 /*
1201 * FIXME: not sure why yet, but on interlaced bt.656,
1202 * changing the vertical cropping causes loss of vertical
1203 * sync, so fix it to NTSC/PAL active lines. NTSC contains
1204 * 2 extra lines of active video that need to be cropped.
1205 */
1206 if (mbus_cfg->type == V4L2_MBUS_BT656 &&
1207 (V4L2_FIELD_HAS_BOTH(infmt->field) ||
1208 infmt->field == V4L2_FIELD_ALTERNATE)) {
1209 crop->height = in_height;
1210 crop->top = (in_height == 480) ? 2 : 0;
1211 } else {
1212 crop->height = min_t(__u32, in_height, crop->height);
1213 if (crop->top + crop->height > in_height)
1214 crop->top = in_height - crop->height;
1215 }
1216 }
1217
csi_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)1218 static int csi_enum_mbus_code(struct v4l2_subdev *sd,
1219 struct v4l2_subdev_state *sd_state,
1220 struct v4l2_subdev_mbus_code_enum *code)
1221 {
1222 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1223 struct v4l2_mbus_config mbus_cfg = { .type = 0 };
1224 const struct imx_media_pixfmt *incc;
1225 struct v4l2_mbus_framefmt *infmt;
1226 int ret = 0;
1227
1228 mutex_lock(&priv->lock);
1229
1230 infmt = __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, code->which);
1231 incc = imx_media_find_mbus_format(infmt->code, PIXFMT_SEL_ANY);
1232
1233 switch (code->pad) {
1234 case CSI_SINK_PAD:
1235 ret = imx_media_enum_mbus_formats(&code->code, code->index,
1236 PIXFMT_SEL_ANY);
1237 break;
1238 case CSI_SRC_PAD_DIRECT:
1239 case CSI_SRC_PAD_IDMAC:
1240 ret = csi_get_upstream_mbus_config(priv, &mbus_cfg);
1241 if (ret) {
1242 v4l2_err(&priv->sd,
1243 "failed to get upstream media bus configuration\n");
1244 goto out;
1245 }
1246
1247 if (requires_passthrough(&mbus_cfg, infmt, incc)) {
1248 if (code->index != 0) {
1249 ret = -EINVAL;
1250 goto out;
1251 }
1252 code->code = infmt->code;
1253 } else {
1254 enum imx_pixfmt_sel fmt_sel =
1255 (incc->cs == IPUV3_COLORSPACE_YUV) ?
1256 PIXFMT_SEL_YUV : PIXFMT_SEL_RGB;
1257
1258 ret = imx_media_enum_ipu_formats(&code->code,
1259 code->index,
1260 fmt_sel);
1261 }
1262 break;
1263 default:
1264 ret = -EINVAL;
1265 }
1266
1267 out:
1268 mutex_unlock(&priv->lock);
1269 return ret;
1270 }
1271
csi_enum_frame_size(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_frame_size_enum * fse)1272 static int csi_enum_frame_size(struct v4l2_subdev *sd,
1273 struct v4l2_subdev_state *sd_state,
1274 struct v4l2_subdev_frame_size_enum *fse)
1275 {
1276 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1277 struct v4l2_rect *crop;
1278 int ret = 0;
1279
1280 if (fse->pad >= CSI_NUM_PADS ||
1281 fse->index > (fse->pad == CSI_SINK_PAD ? 0 : 3))
1282 return -EINVAL;
1283
1284 mutex_lock(&priv->lock);
1285
1286 if (fse->pad == CSI_SINK_PAD) {
1287 fse->min_width = MIN_W;
1288 fse->max_width = MAX_W;
1289 fse->min_height = MIN_H;
1290 fse->max_height = MAX_H;
1291 } else {
1292 crop = __csi_get_crop(priv, sd_state, fse->which);
1293
1294 fse->min_width = fse->index & 1 ?
1295 crop->width / 2 : crop->width;
1296 fse->max_width = fse->min_width;
1297 fse->min_height = fse->index & 2 ?
1298 crop->height / 2 : crop->height;
1299 fse->max_height = fse->min_height;
1300 }
1301
1302 mutex_unlock(&priv->lock);
1303 return ret;
1304 }
1305
csi_enum_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_frame_interval_enum * fie)1306 static int csi_enum_frame_interval(struct v4l2_subdev *sd,
1307 struct v4l2_subdev_state *sd_state,
1308 struct v4l2_subdev_frame_interval_enum *fie)
1309 {
1310 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1311 struct v4l2_fract *input_fi;
1312 struct v4l2_rect *crop;
1313 int ret = 0;
1314
1315 if (fie->pad >= CSI_NUM_PADS ||
1316 fie->index >= (fie->pad != CSI_SRC_PAD_IDMAC ?
1317 1 : ARRAY_SIZE(csi_skip)))
1318 return -EINVAL;
1319
1320 mutex_lock(&priv->lock);
1321
1322 input_fi = &priv->frame_interval[CSI_SINK_PAD];
1323 crop = __csi_get_crop(priv, sd_state, fie->which);
1324
1325 if ((fie->width != crop->width && fie->width != crop->width / 2) ||
1326 (fie->height != crop->height && fie->height != crop->height / 2)) {
1327 ret = -EINVAL;
1328 goto out;
1329 }
1330
1331 fie->interval = *input_fi;
1332
1333 if (fie->pad == CSI_SRC_PAD_IDMAC)
1334 csi_apply_skip_interval(&csi_skip[fie->index],
1335 &fie->interval);
1336
1337 out:
1338 mutex_unlock(&priv->lock);
1339 return ret;
1340 }
1341
csi_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * sdformat)1342 static int csi_get_fmt(struct v4l2_subdev *sd,
1343 struct v4l2_subdev_state *sd_state,
1344 struct v4l2_subdev_format *sdformat)
1345 {
1346 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1347 struct v4l2_mbus_framefmt *fmt;
1348 int ret = 0;
1349
1350 if (sdformat->pad >= CSI_NUM_PADS)
1351 return -EINVAL;
1352
1353 mutex_lock(&priv->lock);
1354
1355 fmt = __csi_get_fmt(priv, sd_state, sdformat->pad, sdformat->which);
1356 if (!fmt) {
1357 ret = -EINVAL;
1358 goto out;
1359 }
1360
1361 sdformat->format = *fmt;
1362 out:
1363 mutex_unlock(&priv->lock);
1364 return ret;
1365 }
1366
csi_try_field(struct csi_priv * priv,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * sdformat)1367 static void csi_try_field(struct csi_priv *priv,
1368 struct v4l2_subdev_state *sd_state,
1369 struct v4l2_subdev_format *sdformat)
1370 {
1371 struct v4l2_mbus_framefmt *infmt =
1372 __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, sdformat->which);
1373
1374 /*
1375 * no restrictions on sink pad field type except must
1376 * be initialized.
1377 */
1378 if (sdformat->pad == CSI_SINK_PAD) {
1379 if (sdformat->format.field == V4L2_FIELD_ANY)
1380 sdformat->format.field = V4L2_FIELD_NONE;
1381 return;
1382 }
1383
1384 switch (infmt->field) {
1385 case V4L2_FIELD_SEQ_TB:
1386 case V4L2_FIELD_SEQ_BT:
1387 /*
1388 * If the user requests sequential at the source pad,
1389 * allow it (along with possibly inverting field order).
1390 * Otherwise passthrough the field type.
1391 */
1392 if (!V4L2_FIELD_IS_SEQUENTIAL(sdformat->format.field))
1393 sdformat->format.field = infmt->field;
1394 break;
1395 case V4L2_FIELD_ALTERNATE:
1396 /*
1397 * This driver does not support alternate field mode, and
1398 * the CSI captures a whole frame, so the CSI never presents
1399 * alternate mode at its source pads. If user has not
1400 * already requested sequential, translate ALTERNATE at
1401 * sink pad to SEQ_TB or SEQ_BT at the source pad depending
1402 * on input height (assume NTSC BT order if 480 total active
1403 * frame lines, otherwise PAL TB order).
1404 */
1405 if (!V4L2_FIELD_IS_SEQUENTIAL(sdformat->format.field))
1406 sdformat->format.field = (infmt->height == 480 / 2) ?
1407 V4L2_FIELD_SEQ_BT : V4L2_FIELD_SEQ_TB;
1408 break;
1409 default:
1410 /* Passthrough for all other input field types */
1411 sdformat->format.field = infmt->field;
1412 break;
1413 }
1414 }
1415
csi_try_fmt(struct csi_priv * priv,struct v4l2_mbus_config * mbus_cfg,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)1416 static void csi_try_fmt(struct csi_priv *priv,
1417 struct v4l2_mbus_config *mbus_cfg,
1418 struct v4l2_subdev_state *sd_state,
1419 struct v4l2_subdev_format *sdformat,
1420 struct v4l2_rect *crop,
1421 struct v4l2_rect *compose,
1422 const struct imx_media_pixfmt **cc)
1423 {
1424 const struct imx_media_pixfmt *incc;
1425 struct v4l2_mbus_framefmt *infmt;
1426 u32 code;
1427
1428 infmt = __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, sdformat->which);
1429
1430 switch (sdformat->pad) {
1431 case CSI_SRC_PAD_DIRECT:
1432 case CSI_SRC_PAD_IDMAC:
1433 incc = imx_media_find_mbus_format(infmt->code, PIXFMT_SEL_ANY);
1434
1435 sdformat->format.width = compose->width;
1436 sdformat->format.height = compose->height;
1437
1438 if (requires_passthrough(mbus_cfg, infmt, incc)) {
1439 sdformat->format.code = infmt->code;
1440 *cc = incc;
1441 } else {
1442 enum imx_pixfmt_sel fmt_sel =
1443 (incc->cs == IPUV3_COLORSPACE_YUV) ?
1444 PIXFMT_SEL_YUV : PIXFMT_SEL_RGB;
1445
1446 *cc = imx_media_find_ipu_format(sdformat->format.code,
1447 fmt_sel);
1448 if (!*cc) {
1449 imx_media_enum_ipu_formats(&code, 0, fmt_sel);
1450 *cc = imx_media_find_ipu_format(code, fmt_sel);
1451 sdformat->format.code = (*cc)->codes[0];
1452 }
1453 }
1454
1455 csi_try_field(priv, sd_state, sdformat);
1456
1457 /* propagate colorimetry from sink */
1458 sdformat->format.colorspace = infmt->colorspace;
1459 sdformat->format.xfer_func = infmt->xfer_func;
1460 sdformat->format.quantization = infmt->quantization;
1461 sdformat->format.ycbcr_enc = infmt->ycbcr_enc;
1462
1463 break;
1464 case CSI_SINK_PAD:
1465 v4l_bound_align_image(&sdformat->format.width, MIN_W, MAX_W,
1466 W_ALIGN, &sdformat->format.height,
1467 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
1468
1469 *cc = imx_media_find_mbus_format(sdformat->format.code,
1470 PIXFMT_SEL_ANY);
1471 if (!*cc) {
1472 imx_media_enum_mbus_formats(&code, 0,
1473 PIXFMT_SEL_YUV_RGB);
1474 *cc = imx_media_find_mbus_format(code,
1475 PIXFMT_SEL_YUV_RGB);
1476 sdformat->format.code = (*cc)->codes[0];
1477 }
1478
1479 csi_try_field(priv, sd_state, sdformat);
1480
1481 /* Reset crop and compose rectangles */
1482 crop->left = 0;
1483 crop->top = 0;
1484 crop->width = sdformat->format.width;
1485 crop->height = sdformat->format.height;
1486 if (sdformat->format.field == V4L2_FIELD_ALTERNATE)
1487 crop->height *= 2;
1488 csi_try_crop(priv, crop, sd_state, &sdformat->format, mbus_cfg);
1489 compose->left = 0;
1490 compose->top = 0;
1491 compose->width = crop->width;
1492 compose->height = crop->height;
1493
1494 break;
1495 }
1496
1497 imx_media_try_colorimetry(&sdformat->format,
1498 priv->active_output_pad == CSI_SRC_PAD_DIRECT);
1499 }
1500
csi_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * sdformat)1501 static int csi_set_fmt(struct v4l2_subdev *sd,
1502 struct v4l2_subdev_state *sd_state,
1503 struct v4l2_subdev_format *sdformat)
1504 {
1505 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1506 struct v4l2_mbus_config mbus_cfg = { .type = 0 };
1507 const struct imx_media_pixfmt *cc;
1508 struct v4l2_mbus_framefmt *fmt;
1509 struct v4l2_rect *crop, *compose;
1510 int ret;
1511
1512 if (sdformat->pad >= CSI_NUM_PADS)
1513 return -EINVAL;
1514
1515 ret = csi_get_upstream_mbus_config(priv, &mbus_cfg);
1516 if (ret) {
1517 v4l2_err(&priv->sd,
1518 "failed to get upstream media bus configuration\n");
1519 return ret;
1520 }
1521
1522 mutex_lock(&priv->lock);
1523
1524 if (priv->stream_count > 0) {
1525 ret = -EBUSY;
1526 goto out;
1527 }
1528
1529 crop = __csi_get_crop(priv, sd_state, sdformat->which);
1530 compose = __csi_get_compose(priv, sd_state, sdformat->which);
1531
1532 csi_try_fmt(priv, &mbus_cfg, sd_state, sdformat, crop, compose, &cc);
1533
1534 fmt = __csi_get_fmt(priv, sd_state, sdformat->pad, sdformat->which);
1535 *fmt = sdformat->format;
1536
1537 if (sdformat->pad == CSI_SINK_PAD) {
1538 int pad;
1539
1540 /* propagate format to source pads */
1541 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) {
1542 const struct imx_media_pixfmt *outcc;
1543 struct v4l2_mbus_framefmt *outfmt;
1544 struct v4l2_subdev_format format;
1545
1546 format.pad = pad;
1547 format.which = sdformat->which;
1548 format.format = sdformat->format;
1549 csi_try_fmt(priv, &mbus_cfg, sd_state, &format, NULL,
1550 compose, &outcc);
1551
1552 outfmt = __csi_get_fmt(priv, sd_state, pad,
1553 sdformat->which);
1554 *outfmt = format.format;
1555
1556 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
1557 priv->cc[pad] = outcc;
1558 }
1559 }
1560
1561 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
1562 priv->cc[sdformat->pad] = cc;
1563
1564 out:
1565 mutex_unlock(&priv->lock);
1566 return ret;
1567 }
1568
csi_get_selection(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_selection * sel)1569 static int csi_get_selection(struct v4l2_subdev *sd,
1570 struct v4l2_subdev_state *sd_state,
1571 struct v4l2_subdev_selection *sel)
1572 {
1573 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1574 struct v4l2_mbus_framefmt *infmt;
1575 struct v4l2_rect *crop, *compose;
1576 int ret = 0;
1577
1578 if (sel->pad != CSI_SINK_PAD)
1579 return -EINVAL;
1580
1581 mutex_lock(&priv->lock);
1582
1583 infmt = __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, sel->which);
1584 crop = __csi_get_crop(priv, sd_state, sel->which);
1585 compose = __csi_get_compose(priv, sd_state, sel->which);
1586
1587 switch (sel->target) {
1588 case V4L2_SEL_TGT_CROP_BOUNDS:
1589 sel->r.left = 0;
1590 sel->r.top = 0;
1591 sel->r.width = infmt->width;
1592 sel->r.height = infmt->height;
1593 if (infmt->field == V4L2_FIELD_ALTERNATE)
1594 sel->r.height *= 2;
1595 break;
1596 case V4L2_SEL_TGT_CROP:
1597 sel->r = *crop;
1598 break;
1599 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
1600 sel->r.left = 0;
1601 sel->r.top = 0;
1602 sel->r.width = crop->width;
1603 sel->r.height = crop->height;
1604 break;
1605 case V4L2_SEL_TGT_COMPOSE:
1606 sel->r = *compose;
1607 break;
1608 default:
1609 ret = -EINVAL;
1610 }
1611
1612 mutex_unlock(&priv->lock);
1613 return ret;
1614 }
1615
csi_set_scale(u32 * compose,u32 crop,u32 flags)1616 static int csi_set_scale(u32 *compose, u32 crop, u32 flags)
1617 {
1618 if ((flags & (V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE)) ==
1619 (V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE) &&
1620 *compose != crop && *compose != crop / 2)
1621 return -ERANGE;
1622
1623 if (*compose <= crop / 2 ||
1624 (*compose < crop * 3 / 4 && !(flags & V4L2_SEL_FLAG_GE)) ||
1625 (*compose < crop && (flags & V4L2_SEL_FLAG_LE)))
1626 *compose = crop / 2;
1627 else
1628 *compose = crop;
1629
1630 return 0;
1631 }
1632
csi_set_selection(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_selection * sel)1633 static int csi_set_selection(struct v4l2_subdev *sd,
1634 struct v4l2_subdev_state *sd_state,
1635 struct v4l2_subdev_selection *sel)
1636 {
1637 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1638 struct v4l2_mbus_config mbus_cfg = { .type = 0 };
1639 struct v4l2_mbus_framefmt *infmt;
1640 struct v4l2_rect *crop, *compose;
1641 int pad, ret;
1642
1643 if (sel->pad != CSI_SINK_PAD)
1644 return -EINVAL;
1645
1646 ret = csi_get_upstream_mbus_config(priv, &mbus_cfg);
1647 if (ret) {
1648 v4l2_err(&priv->sd,
1649 "failed to get upstream media bus configuration\n");
1650 return ret;
1651 }
1652
1653 mutex_lock(&priv->lock);
1654
1655 if (priv->stream_count > 0) {
1656 ret = -EBUSY;
1657 goto out;
1658 }
1659
1660 infmt = __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, sel->which);
1661 crop = __csi_get_crop(priv, sd_state, sel->which);
1662 compose = __csi_get_compose(priv, sd_state, sel->which);
1663
1664 switch (sel->target) {
1665 case V4L2_SEL_TGT_CROP:
1666 /*
1667 * Modifying the crop rectangle always changes the format on
1668 * the source pads. If the KEEP_CONFIG flag is set, just return
1669 * the current crop rectangle.
1670 */
1671 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) {
1672 sel->r = priv->crop;
1673 if (sel->which == V4L2_SUBDEV_FORMAT_TRY)
1674 *crop = sel->r;
1675 goto out;
1676 }
1677
1678 csi_try_crop(priv, &sel->r, sd_state, infmt, &mbus_cfg);
1679
1680 *crop = sel->r;
1681
1682 /* Reset scaling to 1:1 */
1683 compose->width = crop->width;
1684 compose->height = crop->height;
1685 break;
1686 case V4L2_SEL_TGT_COMPOSE:
1687 /*
1688 * Modifying the compose rectangle always changes the format on
1689 * the source pads. If the KEEP_CONFIG flag is set, just return
1690 * the current compose rectangle.
1691 */
1692 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) {
1693 sel->r = priv->compose;
1694 if (sel->which == V4L2_SUBDEV_FORMAT_TRY)
1695 *compose = sel->r;
1696 goto out;
1697 }
1698
1699 sel->r.left = 0;
1700 sel->r.top = 0;
1701 ret = csi_set_scale(&sel->r.width, crop->width, sel->flags);
1702 if (ret)
1703 goto out;
1704 ret = csi_set_scale(&sel->r.height, crop->height, sel->flags);
1705 if (ret)
1706 goto out;
1707
1708 *compose = sel->r;
1709 break;
1710 default:
1711 ret = -EINVAL;
1712 goto out;
1713 }
1714
1715 /* Reset source pads to sink compose rectangle */
1716 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) {
1717 struct v4l2_mbus_framefmt *outfmt;
1718
1719 outfmt = __csi_get_fmt(priv, sd_state, pad, sel->which);
1720 outfmt->width = compose->width;
1721 outfmt->height = compose->height;
1722 }
1723
1724 out:
1725 mutex_unlock(&priv->lock);
1726 return ret;
1727 }
1728
csi_subscribe_event(struct v4l2_subdev * sd,struct v4l2_fh * fh,struct v4l2_event_subscription * sub)1729 static int csi_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
1730 struct v4l2_event_subscription *sub)
1731 {
1732 if (sub->type != V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR)
1733 return -EINVAL;
1734 if (sub->id != 0)
1735 return -EINVAL;
1736
1737 return v4l2_event_subscribe(fh, sub, 0, NULL);
1738 }
1739
csi_unsubscribe_event(struct v4l2_subdev * sd,struct v4l2_fh * fh,struct v4l2_event_subscription * sub)1740 static int csi_unsubscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
1741 struct v4l2_event_subscription *sub)
1742 {
1743 return v4l2_event_unsubscribe(fh, sub);
1744 }
1745
csi_registered(struct v4l2_subdev * sd)1746 static int csi_registered(struct v4l2_subdev *sd)
1747 {
1748 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1749 struct ipu_csi *csi;
1750 int i, ret;
1751 u32 code;
1752
1753 /* get handle to IPU CSI */
1754 csi = ipu_csi_get(priv->ipu, priv->csi_id);
1755 if (IS_ERR(csi)) {
1756 v4l2_err(&priv->sd, "failed to get CSI%d\n", priv->csi_id);
1757 return PTR_ERR(csi);
1758 }
1759 priv->csi = csi;
1760
1761 for (i = 0; i < CSI_NUM_PADS; i++) {
1762 code = 0;
1763 if (i != CSI_SINK_PAD)
1764 imx_media_enum_ipu_formats(&code, 0, PIXFMT_SEL_YUV);
1765
1766 /* set a default mbus format */
1767 ret = imx_media_init_mbus_fmt(&priv->format_mbus[i],
1768 IMX_MEDIA_DEF_PIX_WIDTH,
1769 IMX_MEDIA_DEF_PIX_HEIGHT, code,
1770 V4L2_FIELD_NONE, &priv->cc[i]);
1771 if (ret)
1772 goto put_csi;
1773
1774 /* init default frame interval */
1775 priv->frame_interval[i].numerator = 1;
1776 priv->frame_interval[i].denominator = 30;
1777 }
1778
1779 /* disable frame skipping */
1780 priv->skip = &csi_skip[0];
1781
1782 /* init default crop and compose rectangle sizes */
1783 priv->crop.width = IMX_MEDIA_DEF_PIX_WIDTH;
1784 priv->crop.height = IMX_MEDIA_DEF_PIX_HEIGHT;
1785 priv->compose.width = IMX_MEDIA_DEF_PIX_WIDTH;
1786 priv->compose.height = IMX_MEDIA_DEF_PIX_HEIGHT;
1787
1788 priv->fim = imx_media_fim_init(&priv->sd);
1789 if (IS_ERR(priv->fim)) {
1790 ret = PTR_ERR(priv->fim);
1791 goto put_csi;
1792 }
1793
1794 priv->vdev = imx_media_capture_device_init(priv->sd.dev, &priv->sd,
1795 CSI_SRC_PAD_IDMAC, true);
1796 if (IS_ERR(priv->vdev)) {
1797 ret = PTR_ERR(priv->vdev);
1798 goto free_fim;
1799 }
1800
1801 ret = imx_media_capture_device_register(priv->vdev, 0);
1802 if (ret)
1803 goto remove_vdev;
1804
1805 return 0;
1806
1807 remove_vdev:
1808 imx_media_capture_device_remove(priv->vdev);
1809 free_fim:
1810 if (priv->fim)
1811 imx_media_fim_free(priv->fim);
1812 put_csi:
1813 ipu_csi_put(priv->csi);
1814 return ret;
1815 }
1816
csi_unregistered(struct v4l2_subdev * sd)1817 static void csi_unregistered(struct v4l2_subdev *sd)
1818 {
1819 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1820
1821 imx_media_capture_device_unregister(priv->vdev);
1822 imx_media_capture_device_remove(priv->vdev);
1823
1824 if (priv->fim)
1825 imx_media_fim_free(priv->fim);
1826
1827 if (priv->csi)
1828 ipu_csi_put(priv->csi);
1829 }
1830
1831 /*
1832 * The CSI has only one fwnode endpoint, at the sink pad. Verify the
1833 * endpoint belongs to us, and return CSI_SINK_PAD.
1834 */
csi_get_fwnode_pad(struct media_entity * entity,struct fwnode_endpoint * endpoint)1835 static int csi_get_fwnode_pad(struct media_entity *entity,
1836 struct fwnode_endpoint *endpoint)
1837 {
1838 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
1839 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1840 struct fwnode_handle *csi_port = dev_fwnode(priv->dev);
1841 struct fwnode_handle *csi_ep;
1842 int ret;
1843
1844 csi_ep = fwnode_get_next_child_node(csi_port, NULL);
1845
1846 ret = endpoint->local_fwnode == csi_ep ? CSI_SINK_PAD : -ENXIO;
1847
1848 fwnode_handle_put(csi_ep);
1849
1850 return ret;
1851 }
1852
1853 static const struct media_entity_operations csi_entity_ops = {
1854 .link_setup = csi_link_setup,
1855 .link_validate = v4l2_subdev_link_validate,
1856 .get_fwnode_pad = csi_get_fwnode_pad,
1857 };
1858
1859 static const struct v4l2_subdev_core_ops csi_core_ops = {
1860 .subscribe_event = csi_subscribe_event,
1861 .unsubscribe_event = csi_unsubscribe_event,
1862 };
1863
1864 static const struct v4l2_subdev_video_ops csi_video_ops = {
1865 .g_frame_interval = csi_g_frame_interval,
1866 .s_frame_interval = csi_s_frame_interval,
1867 .s_stream = csi_s_stream,
1868 };
1869
1870 static const struct v4l2_subdev_pad_ops csi_pad_ops = {
1871 .init_cfg = imx_media_init_cfg,
1872 .enum_mbus_code = csi_enum_mbus_code,
1873 .enum_frame_size = csi_enum_frame_size,
1874 .enum_frame_interval = csi_enum_frame_interval,
1875 .get_fmt = csi_get_fmt,
1876 .set_fmt = csi_set_fmt,
1877 .get_selection = csi_get_selection,
1878 .set_selection = csi_set_selection,
1879 .link_validate = csi_link_validate,
1880 };
1881
1882 static const struct v4l2_subdev_ops csi_subdev_ops = {
1883 .core = &csi_core_ops,
1884 .video = &csi_video_ops,
1885 .pad = &csi_pad_ops,
1886 };
1887
1888 static const struct v4l2_subdev_internal_ops csi_internal_ops = {
1889 .registered = csi_registered,
1890 .unregistered = csi_unregistered,
1891 };
1892
imx_csi_notify_bound(struct v4l2_async_notifier * notifier,struct v4l2_subdev * sd,struct v4l2_async_connection * asd)1893 static int imx_csi_notify_bound(struct v4l2_async_notifier *notifier,
1894 struct v4l2_subdev *sd,
1895 struct v4l2_async_connection *asd)
1896 {
1897 struct csi_priv *priv = notifier_to_dev(notifier);
1898 struct media_pad *sink = &priv->sd.entity.pads[CSI_SINK_PAD];
1899
1900 /*
1901 * If the subdev is a video mux, it must be one of the CSI
1902 * muxes. Mark it as such via its group id.
1903 */
1904 if (sd->entity.function == MEDIA_ENT_F_VID_MUX)
1905 sd->grp_id = IMX_MEDIA_GRP_ID_CSI_MUX;
1906
1907 return v4l2_create_fwnode_links_to_pad(sd, sink, 0);
1908 }
1909
1910 static const struct v4l2_async_notifier_operations csi_notify_ops = {
1911 .bound = imx_csi_notify_bound,
1912 };
1913
imx_csi_async_register(struct csi_priv * priv)1914 static int imx_csi_async_register(struct csi_priv *priv)
1915 {
1916 struct v4l2_async_connection *asd = NULL;
1917 struct fwnode_handle *ep;
1918 unsigned int port;
1919 int ret;
1920
1921 v4l2_async_subdev_nf_init(&priv->notifier, &priv->sd);
1922
1923 /* get this CSI's port id */
1924 ret = fwnode_property_read_u32(dev_fwnode(priv->dev), "reg", &port);
1925 if (ret < 0)
1926 return ret;
1927
1928 ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(priv->dev->parent),
1929 port, 0,
1930 FWNODE_GRAPH_ENDPOINT_NEXT);
1931 if (ep) {
1932 asd = v4l2_async_nf_add_fwnode_remote(&priv->notifier, ep,
1933 struct v4l2_async_connection);
1934
1935 fwnode_handle_put(ep);
1936
1937 if (IS_ERR(asd)) {
1938 ret = PTR_ERR(asd);
1939 /* OK if asd already exists */
1940 if (ret != -EEXIST)
1941 return ret;
1942 }
1943 }
1944
1945 priv->notifier.ops = &csi_notify_ops;
1946
1947 ret = v4l2_async_nf_register(&priv->notifier);
1948 if (ret)
1949 return ret;
1950
1951 return v4l2_async_register_subdev(&priv->sd);
1952 }
1953
imx_csi_probe(struct platform_device * pdev)1954 static int imx_csi_probe(struct platform_device *pdev)
1955 {
1956 struct ipu_client_platformdata *pdata;
1957 struct pinctrl *pinctrl;
1958 struct csi_priv *priv;
1959 int i, ret;
1960
1961 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
1962 if (!priv)
1963 return -ENOMEM;
1964
1965 platform_set_drvdata(pdev, &priv->sd);
1966 priv->dev = &pdev->dev;
1967
1968 ret = dma_set_coherent_mask(priv->dev, DMA_BIT_MASK(32));
1969 if (ret)
1970 return ret;
1971
1972 /* get parent IPU */
1973 priv->ipu = dev_get_drvdata(priv->dev->parent);
1974
1975 /* get our CSI id */
1976 pdata = priv->dev->platform_data;
1977 priv->csi_id = pdata->csi;
1978 priv->smfc_id = (priv->csi_id == 0) ? 0 : 2;
1979
1980 priv->active_output_pad = CSI_SRC_PAD_IDMAC;
1981
1982 timer_setup(&priv->eof_timeout_timer, csi_idmac_eof_timeout, 0);
1983 spin_lock_init(&priv->irqlock);
1984
1985 v4l2_subdev_init(&priv->sd, &csi_subdev_ops);
1986 v4l2_set_subdevdata(&priv->sd, priv);
1987 priv->sd.internal_ops = &csi_internal_ops;
1988 priv->sd.entity.ops = &csi_entity_ops;
1989 priv->sd.entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
1990 priv->sd.dev = &pdev->dev;
1991 priv->sd.fwnode = of_fwnode_handle(pdata->of_node);
1992 priv->sd.owner = THIS_MODULE;
1993 priv->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
1994 priv->sd.grp_id = priv->csi_id ?
1995 IMX_MEDIA_GRP_ID_IPU_CSI1 : IMX_MEDIA_GRP_ID_IPU_CSI0;
1996 imx_media_grp_id_to_sd_name(priv->sd.name, sizeof(priv->sd.name),
1997 priv->sd.grp_id, ipu_get_num(priv->ipu));
1998
1999 for (i = 0; i < CSI_NUM_PADS; i++)
2000 priv->pad[i].flags = (i == CSI_SINK_PAD) ?
2001 MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE;
2002
2003 ret = media_entity_pads_init(&priv->sd.entity, CSI_NUM_PADS,
2004 priv->pad);
2005 if (ret)
2006 return ret;
2007
2008 mutex_init(&priv->lock);
2009
2010 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0);
2011 priv->sd.ctrl_handler = &priv->ctrl_hdlr;
2012
2013 /*
2014 * The IPUv3 driver did not assign an of_node to this
2015 * device. As a result, pinctrl does not automatically
2016 * configure our pin groups, so we need to do that manually
2017 * here, after setting this device's of_node.
2018 */
2019 priv->dev->of_node = pdata->of_node;
2020 pinctrl = devm_pinctrl_get_select_default(priv->dev);
2021 if (IS_ERR(pinctrl)) {
2022 ret = PTR_ERR(pinctrl);
2023 dev_dbg(priv->dev,
2024 "devm_pinctrl_get_select_default() failed: %d\n", ret);
2025 if (ret != -ENODEV)
2026 goto free;
2027 }
2028
2029 ret = imx_csi_async_register(priv);
2030 if (ret)
2031 goto cleanup;
2032
2033 return 0;
2034
2035 cleanup:
2036 v4l2_async_nf_unregister(&priv->notifier);
2037 v4l2_async_nf_cleanup(&priv->notifier);
2038 free:
2039 v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
2040 mutex_destroy(&priv->lock);
2041 return ret;
2042 }
2043
imx_csi_remove(struct platform_device * pdev)2044 static void imx_csi_remove(struct platform_device *pdev)
2045 {
2046 struct v4l2_subdev *sd = platform_get_drvdata(pdev);
2047 struct csi_priv *priv = sd_to_dev(sd);
2048
2049 v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
2050 mutex_destroy(&priv->lock);
2051 v4l2_async_nf_unregister(&priv->notifier);
2052 v4l2_async_nf_cleanup(&priv->notifier);
2053 v4l2_async_unregister_subdev(sd);
2054 media_entity_cleanup(&sd->entity);
2055 }
2056
2057 static const struct platform_device_id imx_csi_ids[] = {
2058 { .name = "imx-ipuv3-csi" },
2059 { },
2060 };
2061 MODULE_DEVICE_TABLE(platform, imx_csi_ids);
2062
2063 static struct platform_driver imx_csi_driver = {
2064 .probe = imx_csi_probe,
2065 .remove_new = imx_csi_remove,
2066 .id_table = imx_csi_ids,
2067 .driver = {
2068 .name = "imx-ipuv3-csi",
2069 },
2070 };
2071 module_platform_driver(imx_csi_driver);
2072
2073 MODULE_DESCRIPTION("i.MX CSI subdev driver");
2074 MODULE_AUTHOR("Steve Longerbeam <steve_longerbeam@mentor.com>");
2075 MODULE_LICENSE("GPL");
2076