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media: dvb-frontends: fix i2c access helpers for KASAN
[linux-block.git] / drivers / staging / media / imx / imx-media-csi.c
CommitLineData
4a34ec8e
SL		 1/*
2 * V4L2 Capture CSI Subdev for Freescale i.MX5/6 SOC
3 *
4 * Copyright (c) 2014-2017 Mentor Graphics Inc.
fb30ee79 5 * Copyright (C) 2017 Pengutronix, Philipp Zabel <kernel@pengutronix.de>
4a34ec8e
SL		 6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 */
12#include <linux/delay.h>
fb30ee79 13#include <linux/gcd.h>
4a34ec8e
SL		 14#include <linux/interrupt.h>
15#include <linux/module.h>
16#include <linux/pinctrl/consumer.h>
17#include <linux/platform_device.h>
18#include <media/v4l2-ctrls.h>
19#include <media/v4l2-device.h>
20#include <media/v4l2-event.h>
21#include <media/v4l2-fwnode.h>
22#include <media/v4l2-mc.h>
23#include <media/v4l2-subdev.h>
24#include <media/videobuf2-dma-contig.h>
25#include <video/imx-ipu-v3.h>
26#include <media/imx.h>
27#include "imx-media.h"
28
29/*
30 * Min/Max supported width and heights.
31 *
32 * We allow planar output, so we have to align width by 16 pixels
33 * to meet IDMAC alignment requirements.
34 *
35 * TODO: move this into pad format negotiation, if capture device
36 * has not requested planar formats, we should allow 8 pixel
37 * alignment.
38 */
39#define MIN_W 176
40#define MIN_H 144
41#define MAX_W 4096
42#define MAX_H 4096
43#define W_ALIGN 4 /* multiple of 16 pixels */
44#define H_ALIGN 1 /* multiple of 2 lines */
45#define S_ALIGN 1 /* multiple of 2 */
46
fb30ee79
PZ		 47/*
48 * struct csi_skip_desc - CSI frame skipping descriptor
49 * @keep - number of frames kept per max_ratio frames
50 * @max_ratio - width of skip_smfc, written to MAX_RATIO bitfield
51 * @skip_smfc - skip pattern written to the SKIP_SMFC bitfield
52 */
53struct csi_skip_desc {
54 u8 keep;
55 u8 max_ratio;
56 u8 skip_smfc;
57};
58
4a34ec8e
SL		 59struct csi_priv {
60 struct device *dev;
61 struct ipu_soc *ipu;
62 struct imx_media_dev *md;
63 struct v4l2_subdev sd;
64 struct media_pad pad[CSI_NUM_PADS];
65 /* the video device at IDMAC output pad */
66 struct imx_media_video_dev *vdev;
67 struct imx_media_fim *fim;
68 int csi_id;
69 int smfc_id;
70
71 /* lock to protect all members below */
72 struct mutex lock;
73
74 int active_output_pad;
75
76 struct ipuv3_channel *idmac_ch;
77 struct ipu_smfc *smfc;
78 struct ipu_csi *csi;
79
80 struct v4l2_mbus_framefmt format_mbus[CSI_NUM_PADS];
81 const struct imx_media_pixfmt *cc[CSI_NUM_PADS];
fb30ee79 82 struct v4l2_fract frame_interval[CSI_NUM_PADS];
4a34ec8e 83 struct v4l2_rect crop;
69e78611 84 struct v4l2_rect compose;
fb30ee79 85 const struct csi_skip_desc *skip;
4a34ec8e
SL		 86
87 /* active vb2 buffers to send to video dev sink */
88 struct imx_media_buffer *active_vb2_buf[2];
89 struct imx_media_dma_buf underrun_buf;
90
91 int ipu_buf_num; /* ipu double buffer index: 0-1 */
92
93 /* the sink for the captured frames */
94 struct media_entity *sink;
95 enum ipu_csi_dest dest;
96 /* the source subdev */
97 struct v4l2_subdev *src_sd;
98
99 /* the mipi virtual channel number at link validate */
100 int vc_num;
101
102 /* the attached sensor at stream on */
103 struct imx_media_subdev *sensor;
104
105 spinlock_t irqlock; /* protect eof_irq handler */
106 struct timer_list eof_timeout_timer;
107 int eof_irq;
108 int nfb4eof_irq;
109
110 struct v4l2_ctrl_handler ctrl_hdlr;
111
112 int stream_count; /* streaming counter */
113 bool last_eof; /* waiting for last EOF at stream off */
114 bool nfb4eof; /* NFB4EOF encountered during streaming */
115 struct completion last_eof_comp;
116};
117
118static inline struct csi_priv *sd_to_dev(struct v4l2_subdev *sdev)
119{
120 return container_of(sdev, struct csi_priv, sd);
121}
122
123static void csi_idmac_put_ipu_resources(struct csi_priv *priv)
124{
0b2e9e79 125 if (priv->idmac_ch)
4a34ec8e
SL		 126 ipu_idmac_put(priv->idmac_ch);
127 priv->idmac_ch = NULL;
128
0b2e9e79 129 if (priv->smfc)
4a34ec8e
SL		 130 ipu_smfc_put(priv->smfc);
131 priv->smfc = NULL;
132}
133
134static int csi_idmac_get_ipu_resources(struct csi_priv *priv)
135{
136 int ch_num, ret;
0b2e9e79
AB		 137 struct ipu_smfc *smfc;
138 struct ipuv3_channel *idmac_ch;
4a34ec8e
SL		 139
140 ch_num = IPUV3_CHANNEL_CSI0 + priv->smfc_id;
141
0b2e9e79
AB		 142 smfc = ipu_smfc_get(priv->ipu, ch_num);
143 if (IS_ERR(smfc)) {
4a34ec8e 144 v4l2_err(&priv->sd, "failed to get SMFC\n");
0b2e9e79 145 ret = PTR_ERR(smfc);
4a34ec8e
SL		 146 goto out;
147 }
0b2e9e79 148 priv->smfc = smfc;
4a34ec8e 149
0b2e9e79
AB		 150 idmac_ch = ipu_idmac_get(priv->ipu, ch_num);
151 if (IS_ERR(idmac_ch)) {
4a34ec8e
SL		 152 v4l2_err(&priv->sd, "could not get IDMAC channel %u\n",
153 ch_num);
0b2e9e79 154 ret = PTR_ERR(idmac_ch);
4a34ec8e
SL		 155 goto out;
156 }
0b2e9e79 157 priv->idmac_ch = idmac_ch;
4a34ec8e
SL		 158
159 return 0;
160out:
161 csi_idmac_put_ipu_resources(priv);
162 return ret;
163}
164
165static void csi_vb2_buf_done(struct csi_priv *priv)
166{
167 struct imx_media_video_dev *vdev = priv->vdev;
168 struct imx_media_buffer *done, *next;
169 struct vb2_buffer *vb;
170 dma_addr_t phys;
171
172 done = priv->active_vb2_buf[priv->ipu_buf_num];
173 if (done) {
174 vb = &done->vbuf.vb2_buf;
175 vb->timestamp = ktime_get_ns();
176 vb2_buffer_done(vb, priv->nfb4eof ?
177 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
178 }
179
180 priv->nfb4eof = false;
181
182 /* get next queued buffer */
183 next = imx_media_capture_device_next_buf(vdev);
184 if (next) {
185 phys = vb2_dma_contig_plane_dma_addr(&next->vbuf.vb2_buf, 0);
186 priv->active_vb2_buf[priv->ipu_buf_num] = next;
187 } else {
188 phys = priv->underrun_buf.phys;
189 priv->active_vb2_buf[priv->ipu_buf_num] = NULL;
190 }
191
192 if (ipu_idmac_buffer_is_ready(priv->idmac_ch, priv->ipu_buf_num))
193 ipu_idmac_clear_buffer(priv->idmac_ch, priv->ipu_buf_num);
194
195 ipu_cpmem_set_buffer(priv->idmac_ch, priv->ipu_buf_num, phys);
196}
197
198static irqreturn_t csi_idmac_eof_interrupt(int irq, void *dev_id)
199{
200 struct csi_priv *priv = dev_id;
201
202 spin_lock(&priv->irqlock);
203
204 if (priv->last_eof) {
205 complete(&priv->last_eof_comp);
206 priv->last_eof = false;
207 goto unlock;
208 }
209
1d88f4bc 210 if (priv->fim)
4a34ec8e 211 /* call frame interval monitor */
1d88f4bc 212 imx_media_fim_eof_monitor(priv->fim, ktime_get());
4a34ec8e
SL		 213
214 csi_vb2_buf_done(priv);
215
216 /* select new IPU buf */
217 ipu_idmac_select_buffer(priv->idmac_ch, priv->ipu_buf_num);
218 /* toggle IPU double-buffer index */
219 priv->ipu_buf_num ^= 1;
220
221 /* bump the EOF timeout timer */
222 mod_timer(&priv->eof_timeout_timer,
223 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT));
224
225unlock:
226 spin_unlock(&priv->irqlock);
227 return IRQ_HANDLED;
228}
229
230static irqreturn_t csi_idmac_nfb4eof_interrupt(int irq, void *dev_id)
231{
232 struct csi_priv *priv = dev_id;
233
234 spin_lock(&priv->irqlock);
235
236 /*
237 * this is not an unrecoverable error, just mark
238 * the next captured frame with vb2 error flag.
239 */
240 priv->nfb4eof = true;
241
242 v4l2_err(&priv->sd, "NFB4EOF\n");
243
244 spin_unlock(&priv->irqlock);
245
246 return IRQ_HANDLED;
247}
248
249/*
250 * EOF timeout timer function. This is an unrecoverable condition
251 * without a stream restart.
252 */
e99e88a9 253static void csi_idmac_eof_timeout(struct timer_list *t)
4a34ec8e 254{
e99e88a9 255 struct csi_priv *priv = from_timer(priv, t, eof_timeout_timer);
4a34ec8e
SL		 256 struct imx_media_video_dev *vdev = priv->vdev;
257
258 v4l2_err(&priv->sd, "EOF timeout\n");
259
260 /* signal a fatal error to capture device */
261 imx_media_capture_device_error(vdev);
262}
263
264static void csi_idmac_setup_vb2_buf(struct csi_priv *priv, dma_addr_t *phys)
265{
266 struct imx_media_video_dev *vdev = priv->vdev;
267 struct imx_media_buffer *buf;
268 int i;
269
270 for (i = 0; i < 2; i++) {
271 buf = imx_media_capture_device_next_buf(vdev);
272 if (buf) {
273 priv->active_vb2_buf[i] = buf;
274 phys[i] = vb2_dma_contig_plane_dma_addr(
275 &buf->vbuf.vb2_buf, 0);
276 } else {
277 priv->active_vb2_buf[i] = NULL;
278 phys[i] = priv->underrun_buf.phys;
279 }
280 }
281}
282
283static void csi_idmac_unsetup_vb2_buf(struct csi_priv *priv,
284 enum vb2_buffer_state return_status)
285{
286 struct imx_media_buffer *buf;
287 int i;
288
289 /* return any remaining active frames with return_status */
290 for (i = 0; i < 2; i++) {
291 buf = priv->active_vb2_buf[i];
292 if (buf) {
293 struct vb2_buffer *vb = &buf->vbuf.vb2_buf;
294
295 vb->timestamp = ktime_get_ns();
296 vb2_buffer_done(vb, return_status);
297 }
298 }
299}
300
301/* init the SMFC IDMAC channel */
302static int csi_idmac_setup_channel(struct csi_priv *priv)
303{
304 struct imx_media_video_dev *vdev = priv->vdev;
305 struct v4l2_fwnode_endpoint *sensor_ep;
306 struct v4l2_mbus_framefmt *infmt;
4a34ec8e 307 struct ipu_image image;
c8da8c03 308 u32 passthrough_bits;
4a34ec8e
SL		 309 dma_addr_t phys[2];
310 bool passthrough;
c8da8c03 311 u32 burst_size;
4a34ec8e
SL		 312 int ret;
313
314 infmt = &priv->format_mbus[CSI_SINK_PAD];
315 sensor_ep = &priv->sensor->sensor_ep;
316
317 ipu_cpmem_zero(priv->idmac_ch);
318
319 memset(&image, 0, sizeof(image));
320 image.pix = vdev->fmt.fmt.pix;
321 image.rect.width = image.pix.width;
322 image.rect.height = image.pix.height;
323
324 csi_idmac_setup_vb2_buf(priv, phys);
325
326 image.phys0 = phys[0];
327 image.phys1 = phys[1];
328
4a34ec8e 329 /*
c8da8c03
RK		 330 * Check for conditions that require the IPU to handle the
331 * data internally as generic data, aka passthrough mode:
332 * - raw bayer formats
333 * - the sensor bus is 16-bit parallel
4a34ec8e 334 */
c8da8c03
RK		 335 switch (image.pix.pixelformat) {
336 case V4L2_PIX_FMT_SBGGR8:
337 case V4L2_PIX_FMT_SGBRG8:
338 case V4L2_PIX_FMT_SGRBG8:
339 case V4L2_PIX_FMT_SRGGB8:
37ea9830 340 burst_size = 16;
c8da8c03
RK		 341 passthrough = true;
342 passthrough_bits = 8;
343 break;
344 case V4L2_PIX_FMT_SBGGR16:
345 case V4L2_PIX_FMT_SGBRG16:
346 case V4L2_PIX_FMT_SGRBG16:
347 case V4L2_PIX_FMT_SRGGB16:
348 burst_size = 4;
349 passthrough = true;
350 passthrough_bits = 16;
351 break;
6f303592
PZ		 352 case V4L2_PIX_FMT_YUV420:
353 case V4L2_PIX_FMT_NV12:
354 burst_size = (image.pix.width & 0x3f) ?
355 ((image.pix.width & 0x1f) ?
356 ((image.pix.width & 0xf) ? 8 : 16) : 32) : 64;
357 passthrough = (sensor_ep->bus_type != V4L2_MBUS_CSI2 &&
358 sensor_ep->bus.parallel.bus_width >= 16);
359 passthrough_bits = 16;
14330d7f
PZ		 360 /* Skip writing U and V components to odd rows */
361 ipu_cpmem_skip_odd_chroma_rows(priv->idmac_ch);
6f303592
PZ		 362 break;
363 case V4L2_PIX_FMT_YUYV:
364 case V4L2_PIX_FMT_UYVY:
365 burst_size = (image.pix.width & 0x1f) ?
366 ((image.pix.width & 0xf) ? 8 : 16) : 32;
367 passthrough = (sensor_ep->bus_type != V4L2_MBUS_CSI2 &&
368 sensor_ep->bus.parallel.bus_width >= 16);
369 passthrough_bits = 16;
370 break;
c8da8c03
RK		 371 default:
372 burst_size = (image.pix.width & 0xf) ? 8 : 16;
373 passthrough = (sensor_ep->bus_type != V4L2_MBUS_CSI2 &&
374 sensor_ep->bus.parallel.bus_width >= 16);
375 passthrough_bits = 16;
376 break;
377 }
4a34ec8e 378
c8da8c03
RK		 379 if (passthrough) {
380 ipu_cpmem_set_resolution(priv->idmac_ch, image.rect.width,
381 image.rect.height);
382 ipu_cpmem_set_stride(priv->idmac_ch, image.pix.bytesperline);
383 ipu_cpmem_set_buffer(priv->idmac_ch, 0, image.phys0);
384 ipu_cpmem_set_buffer(priv->idmac_ch, 1, image.phys1);
385 ipu_cpmem_set_format_passthrough(priv->idmac_ch,
386 passthrough_bits);
387 } else {
388 ret = ipu_cpmem_set_image(priv->idmac_ch, &image);
389 if (ret)
390 goto unsetup_vb2;
391 }
392
393 ipu_cpmem_set_burstsize(priv->idmac_ch, burst_size);
4a34ec8e
SL		 394
395 /*
396 * Set the channel for the direct CSI-->memory via SMFC
397 * use-case to very high priority, by enabling the watermark
398 * signal in the SMFC, enabling WM in the channel, and setting
399 * the channel priority to high.
400 *
401 * Refer to the i.mx6 rev. D TRM Table 36-8: Calculated priority
402 * value.
403 *
404 * The WM's are set very low by intention here to ensure that
405 * the SMFC FIFOs do not overflow.
406 */
407 ipu_smfc_set_watermark(priv->smfc, 0x02, 0x01);
408 ipu_cpmem_set_high_priority(priv->idmac_ch);
409 ipu_idmac_enable_watermark(priv->idmac_ch, true);
410 ipu_cpmem_set_axi_id(priv->idmac_ch, 0);
411
412 burst_size = passthrough ?
413 (burst_size >> 3) - 1 : (burst_size >> 2) - 1;
414
415 ipu_smfc_set_burstsize(priv->smfc, burst_size);
416
417 if (image.pix.field == V4L2_FIELD_NONE &&
418 V4L2_FIELD_HAS_BOTH(infmt->field))
419 ipu_cpmem_interlaced_scan(priv->idmac_ch,
420 image.pix.bytesperline);
421
422 ipu_idmac_set_double_buffer(priv->idmac_ch, true);
423
424 return 0;
425
426unsetup_vb2:
427 csi_idmac_unsetup_vb2_buf(priv, VB2_BUF_STATE_QUEUED);
428 return ret;
429}
430
431static void csi_idmac_unsetup(struct csi_priv *priv,
432 enum vb2_buffer_state state)
433{
434 ipu_idmac_disable_channel(priv->idmac_ch);
435 ipu_smfc_disable(priv->smfc);
436
437 csi_idmac_unsetup_vb2_buf(priv, state);
438}
439
440static int csi_idmac_setup(struct csi_priv *priv)
441{
442 int ret;
443
444 ret = csi_idmac_setup_channel(priv);
445 if (ret)
446 return ret;
447
448 ipu_cpmem_dump(priv->idmac_ch);
449 ipu_dump(priv->ipu);
450
451 ipu_smfc_enable(priv->smfc);
452
453 /* set buffers ready */
454 ipu_idmac_select_buffer(priv->idmac_ch, 0);
455 ipu_idmac_select_buffer(priv->idmac_ch, 1);
456
457 /* enable the channels */
458 ipu_idmac_enable_channel(priv->idmac_ch);
459
460 return 0;
461}
462
463static int csi_idmac_start(struct csi_priv *priv)
464{
465 struct imx_media_video_dev *vdev = priv->vdev;
466 struct v4l2_pix_format *outfmt;
467 int ret;
468
469 ret = csi_idmac_get_ipu_resources(priv);
470 if (ret)
471 return ret;
472
473 ipu_smfc_map_channel(priv->smfc, priv->csi_id, priv->vc_num);
474
475 outfmt = &vdev->fmt.fmt.pix;
476
477 ret = imx_media_alloc_dma_buf(priv->md, &priv->underrun_buf,
478 outfmt->sizeimage);
479 if (ret)
480 goto out_put_ipu;
481
482 priv->ipu_buf_num = 0;
483
484 /* init EOF completion waitq */
485 init_completion(&priv->last_eof_comp);
486 priv->last_eof = false;
487 priv->nfb4eof = false;
488
489 ret = csi_idmac_setup(priv);
490 if (ret) {
491 v4l2_err(&priv->sd, "csi_idmac_setup failed: %d\n", ret);
492 goto out_free_dma_buf;
493 }
494
495 priv->nfb4eof_irq = ipu_idmac_channel_irq(priv->ipu,
496 priv->idmac_ch,
497 IPU_IRQ_NFB4EOF);
498 ret = devm_request_irq(priv->dev, priv->nfb4eof_irq,
499 csi_idmac_nfb4eof_interrupt, 0,
500 "imx-smfc-nfb4eof", priv);
501 if (ret) {
502 v4l2_err(&priv->sd,
503 "Error registering NFB4EOF irq: %d\n", ret);
504 goto out_unsetup;
505 }
506
507 priv->eof_irq = ipu_idmac_channel_irq(priv->ipu, priv->idmac_ch,
508 IPU_IRQ_EOF);
509
510 ret = devm_request_irq(priv->dev, priv->eof_irq,
511 csi_idmac_eof_interrupt, 0,
512 "imx-smfc-eof", priv);
513 if (ret) {
514 v4l2_err(&priv->sd,
515 "Error registering eof irq: %d\n", ret);
516 goto out_free_nfb4eof_irq;
517 }
518
519 /* start the EOF timeout timer */
520 mod_timer(&priv->eof_timeout_timer,
521 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT));
522
523 return 0;
524
525out_free_nfb4eof_irq:
526 devm_free_irq(priv->dev, priv->nfb4eof_irq, priv);
527out_unsetup:
528 csi_idmac_unsetup(priv, VB2_BUF_STATE_QUEUED);
529out_free_dma_buf:
530 imx_media_free_dma_buf(priv->md, &priv->underrun_buf);
531out_put_ipu:
532 csi_idmac_put_ipu_resources(priv);
533 return ret;
534}
535
536static void csi_idmac_stop(struct csi_priv *priv)
537{
538 unsigned long flags;
539 int ret;
540
541 /* mark next EOF interrupt as the last before stream off */
542 spin_lock_irqsave(&priv->irqlock, flags);
543 priv->last_eof = true;
544 spin_unlock_irqrestore(&priv->irqlock, flags);
545
546 /*
547 * and then wait for interrupt handler to mark completion.
548 */
549 ret = wait_for_completion_timeout(
550 &priv->last_eof_comp, msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT));
551 if (ret == 0)
552 v4l2_warn(&priv->sd, "wait last EOF timeout\n");
553
554 devm_free_irq(priv->dev, priv->eof_irq, priv);
555 devm_free_irq(priv->dev, priv->nfb4eof_irq, priv);
556
557 csi_idmac_unsetup(priv, VB2_BUF_STATE_ERROR);
558
559 imx_media_free_dma_buf(priv->md, &priv->underrun_buf);
560
561 /* cancel the EOF timeout timer */
562 del_timer_sync(&priv->eof_timeout_timer);
563
564 csi_idmac_put_ipu_resources(priv);
565}
566
567/* Update the CSI whole sensor and active windows */
568static int csi_setup(struct csi_priv *priv)
569{
570 struct v4l2_mbus_framefmt *infmt, *outfmt;
571 struct v4l2_mbus_config sensor_mbus_cfg;
572 struct v4l2_fwnode_endpoint *sensor_ep;
573 struct v4l2_mbus_framefmt if_fmt;
574
575 infmt = &priv->format_mbus[CSI_SINK_PAD];
576 outfmt = &priv->format_mbus[priv->active_output_pad];
577 sensor_ep = &priv->sensor->sensor_ep;
578
579 /* compose mbus_config from sensor endpoint */
580 sensor_mbus_cfg.type = sensor_ep->bus_type;
581 sensor_mbus_cfg.flags = (sensor_ep->bus_type == V4L2_MBUS_CSI2) ?
582 sensor_ep->bus.mipi_csi2.flags :
583 sensor_ep->bus.parallel.flags;
584
585 /*
586 * we need to pass input sensor frame to CSI interface, but
587 * with translated field type from output format
588 */
589 if_fmt = *infmt;
590 if_fmt.field = outfmt->field;
591
592 ipu_csi_set_window(priv->csi, &priv->crop);
593
594 ipu_csi_set_downsize(priv->csi,
69e78611
PZ		 595 priv->crop.width == 2 * priv->compose.width,
596 priv->crop.height == 2 * priv->compose.height);
4a34ec8e
SL		 597
598 ipu_csi_init_interface(priv->csi, &sensor_mbus_cfg, &if_fmt);
599
600 ipu_csi_set_dest(priv->csi, priv->dest);
601
fb30ee79
PZ		 602 if (priv->dest == IPU_CSI_DEST_IDMAC)
603 ipu_csi_set_skip_smfc(priv->csi, priv->skip->skip_smfc,
604 priv->skip->max_ratio - 1, 0);
605
4a34ec8e
SL		 606 ipu_csi_dump(priv->csi);
607
608 return 0;
609}
610
611static int csi_start(struct csi_priv *priv)
612{
fb30ee79 613 struct v4l2_fract *output_fi, *input_fi;
4a34ec8e
SL		 614 u32 bad_frames = 0;
615 int ret;
616
617 if (!priv->sensor) {
618 v4l2_err(&priv->sd, "no sensor attached\n");
619 return -EINVAL;
620 }
621
fb30ee79
PZ		 622 output_fi = &priv->frame_interval[priv->active_output_pad];
623 input_fi = &priv->frame_interval[CSI_SINK_PAD];
624
4a34ec8e
SL		 625 ret = v4l2_subdev_call(priv->sensor->sd, sensor,
626 g_skip_frames, &bad_frames);
627 if (!ret && bad_frames) {
4a34ec8e
SL		 628 u32 delay_usec;
629
630 /*
631 * This sensor has bad frames when it is turned on,
632 * add a delay to avoid them before enabling the CSI
633 * hardware. Especially for sensors with a bt.656 interface,
634 * any shifts in the SAV/EAV sync codes will cause the CSI
635 * to lose vert/horiz sync.
636 */
637 delay_usec = DIV_ROUND_UP_ULL(
fb30ee79
PZ		 638 (u64)USEC_PER_SEC * input_fi->numerator * bad_frames,
639 input_fi->denominator);
4a34ec8e
SL		 640 usleep_range(delay_usec, delay_usec + 1000);
641 }
642
643 if (priv->dest == IPU_CSI_DEST_IDMAC) {
644 ret = csi_idmac_start(priv);
645 if (ret)
646 return ret;
647 }
648
649 ret = csi_setup(priv);
650 if (ret)
651 goto idmac_stop;
652
653 /* start the frame interval monitor */
654 if (priv->fim && priv->dest == IPU_CSI_DEST_IDMAC) {
fb30ee79 655 ret = imx_media_fim_set_stream(priv->fim, output_fi, true);
4a34ec8e
SL		 656 if (ret)
657 goto idmac_stop;
658 }
659
660 ret = ipu_csi_enable(priv->csi);
661 if (ret) {
662 v4l2_err(&priv->sd, "CSI enable error: %d\n", ret);
663 goto fim_off;
664 }
665
666 return 0;
667
668fim_off:
669 if (priv->fim && priv->dest == IPU_CSI_DEST_IDMAC)
fb30ee79 670 imx_media_fim_set_stream(priv->fim, NULL, false);
4a34ec8e
SL		 671idmac_stop:
672 if (priv->dest == IPU_CSI_DEST_IDMAC)
673 csi_idmac_stop(priv);
674 return ret;
675}
676
677static void csi_stop(struct csi_priv *priv)
678{
679 if (priv->dest == IPU_CSI_DEST_IDMAC) {
680 csi_idmac_stop(priv);
681
682 /* stop the frame interval monitor */
683 if (priv->fim)
fb30ee79 684 imx_media_fim_set_stream(priv->fim, NULL, false);
4a34ec8e
SL		 685 }
686
687 ipu_csi_disable(priv->csi);
688}
689
fb30ee79
PZ		 690static const struct csi_skip_desc csi_skip[12] = {
691 { 1, 1, 0x00 }, /* Keep all frames */
692 { 5, 6, 0x10 }, /* Skip every sixth frame */
693 { 4, 5, 0x08 }, /* Skip every fifth frame */
694 { 3, 4, 0x04 }, /* Skip every fourth frame */
695 { 2, 3, 0x02 }, /* Skip every third frame */
696 { 3, 5, 0x0a }, /* Skip frames 1 and 3 of every 5 */
697 { 1, 2, 0x01 }, /* Skip every second frame */
698 { 2, 5, 0x0b }, /* Keep frames 1 and 4 of every 5 */
699 { 1, 3, 0x03 }, /* Keep one in three frames */
700 { 1, 4, 0x07 }, /* Keep one in four frames */
701 { 1, 5, 0x0f }, /* Keep one in five frames */
702 { 1, 6, 0x1f }, /* Keep one in six frames */
703};
704
705static void csi_apply_skip_interval(const struct csi_skip_desc *skip,
706 struct v4l2_fract *interval)
707{
708 unsigned int div;
709
710 interval->numerator *= skip->max_ratio;
711 interval->denominator *= skip->keep;
712
713 /* Reduce fraction to lowest terms */
714 div = gcd(interval->numerator, interval->denominator);
715 if (div > 1) {
716 interval->numerator /= div;
717 interval->denominator /= div;
718 }
719}
720
721/*
722 * Find the skip pattern to produce the output frame interval closest to the
723 * requested one, for the given input frame interval. Updates the output frame
724 * interval to the exact value.
725 */
726static const struct csi_skip_desc *csi_find_best_skip(struct v4l2_fract *in,
727 struct v4l2_fract *out)
728{
729 const struct csi_skip_desc *skip = &csi_skip[0], *best_skip = skip;
730 u32 min_err = UINT_MAX;
731 u64 want_us;
732 int i;
733
734 /* Default to 1:1 ratio */
735 if (out->numerator == 0 || out->denominator == 0 ||
736 in->numerator == 0 || in->denominator == 0) {
737 *out = *in;
738 return best_skip;
739 }
740
741 want_us = div_u64((u64)USEC_PER_SEC * out->numerator, out->denominator);
742
743 /* Find the reduction closest to the requested time per frame */
744 for (i = 0; i < ARRAY_SIZE(csi_skip); i++, skip++) {
745 u64 tmp, err;
746
747 tmp = div_u64((u64)USEC_PER_SEC * in->numerator *
748 skip->max_ratio, in->denominator * skip->keep);
749
750 err = abs((s64)tmp - want_us);
751 if (err < min_err) {
752 min_err = err;
753 best_skip = skip;
754 }
755 }
756
757 *out = *in;
758 csi_apply_skip_interval(best_skip, out);
759
760 return best_skip;
761}
762
4a34ec8e
SL		 763/*
764 * V4L2 subdev operations.
765 */
766
767static int csi_g_frame_interval(struct v4l2_subdev *sd,
768 struct v4l2_subdev_frame_interval *fi)
769{
770 struct csi_priv *priv = v4l2_get_subdevdata(sd);
771
fb30ee79
PZ		 772 if (fi->pad >= CSI_NUM_PADS)
773 return -EINVAL;
774
4a34ec8e 775 mutex_lock(&priv->lock);
fb30ee79
PZ		 776
777 fi->interval = priv->frame_interval[fi->pad];
778
4a34ec8e
SL		 779 mutex_unlock(&priv->lock);
780
781 return 0;
782}
783
784static int csi_s_frame_interval(struct v4l2_subdev *sd,
785 struct v4l2_subdev_frame_interval *fi)
786{
787 struct csi_priv *priv = v4l2_get_subdevdata(sd);
fb30ee79
PZ		 788 struct v4l2_fract *input_fi;
789 int ret = 0;
4a34ec8e
SL		 790
791 mutex_lock(&priv->lock);
792
fb30ee79 793 input_fi = &priv->frame_interval[CSI_SINK_PAD];
4a34ec8e 794
fb30ee79
PZ		 795 switch (fi->pad) {
796 case CSI_SINK_PAD:
797 /* No limits on input frame interval */
798 /* Reset output intervals and frame skipping ratio to 1:1 */
799 priv->frame_interval[CSI_SRC_PAD_IDMAC] = fi->interval;
800 priv->frame_interval[CSI_SRC_PAD_DIRECT] = fi->interval;
801 priv->skip = &csi_skip[0];
802 break;
803 case CSI_SRC_PAD_IDMAC:
804 /*
805 * frame interval at IDMAC output pad depends on input
806 * interval, modified by frame skipping.
807 */
808 priv->skip = csi_find_best_skip(input_fi, &fi->interval);
809 break;
810 case CSI_SRC_PAD_DIRECT:
811 /*
812 * frame interval at DIRECT output pad is same as input
813 * interval.
814 */
815 fi->interval = *input_fi;
816 break;
817 default:
818 ret = -EINVAL;
819 goto out;
820 }
4a34ec8e 821
fb30ee79
PZ		 822 priv->frame_interval[fi->pad] = fi->interval;
823out:
4a34ec8e 824 mutex_unlock(&priv->lock);
fb30ee79 825 return ret;
4a34ec8e
SL		 826}
827
828static int csi_s_stream(struct v4l2_subdev *sd, int enable)
829{
830 struct csi_priv *priv = v4l2_get_subdevdata(sd);
831 int ret = 0;
832
833 mutex_lock(&priv->lock);
834
835 if (!priv->src_sd || !priv->sink) {
836 ret = -EPIPE;
837 goto out;
838 }
839
840 /*
841 * enable/disable streaming only if stream_count is
842 * going from 0 to 1 / 1 to 0.
843 */
844 if (priv->stream_count != !enable)
845 goto update_count;
846
847 if (enable) {
848 /* upstream must be started first, before starting CSI */
849 ret = v4l2_subdev_call(priv->src_sd, video, s_stream, 1);
850 ret = (ret && ret != -ENOIOCTLCMD) ? ret : 0;
851 if (ret)
852 goto out;
853
854 dev_dbg(priv->dev, "stream ON\n");
855 ret = csi_start(priv);
856 if (ret) {
857 v4l2_subdev_call(priv->src_sd, video, s_stream, 0);
858 goto out;
859 }
860 } else {
861 dev_dbg(priv->dev, "stream OFF\n");
862 /* CSI must be stopped first, then stop upstream */
863 csi_stop(priv);
864 v4l2_subdev_call(priv->src_sd, video, s_stream, 0);
865 }
866
867update_count:
868 priv->stream_count += enable ? 1 : -1;
de2e0456
MV		 869 if (priv->stream_count < 0)
870 priv->stream_count = 0;
4a34ec8e
SL		 871out:
872 mutex_unlock(&priv->lock);
873 return ret;
874}
875
876static int csi_link_setup(struct media_entity *entity,
877 const struct media_pad *local,
878 const struct media_pad *remote, u32 flags)
879{
880 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
881 struct csi_priv *priv = v4l2_get_subdevdata(sd);
882 struct v4l2_subdev *remote_sd;
883 int ret = 0;
884
885 dev_dbg(priv->dev, "link setup %s -> %s\n", remote->entity->name,
886 local->entity->name);
887
888 mutex_lock(&priv->lock);
889
890 if (local->flags & MEDIA_PAD_FL_SINK) {
891 if (!is_media_entity_v4l2_subdev(remote->entity)) {
892 ret = -EINVAL;
893 goto out;
894 }
895
896 remote_sd = media_entity_to_v4l2_subdev(remote->entity);
897
898 if (flags & MEDIA_LNK_FL_ENABLED) {
899 if (priv->src_sd) {
900 ret = -EBUSY;
901 goto out;
902 }
903 priv->src_sd = remote_sd;
904 } else {
905 priv->src_sd = NULL;
906 }
907
908 goto out;
909 }
910
911 /* this is a source pad */
912
913 if (flags & MEDIA_LNK_FL_ENABLED) {
914 if (priv->sink) {
915 ret = -EBUSY;
916 goto out;
917 }
918 } else {
919 v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
920 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0);
921 priv->sink = NULL;
922 goto out;
923 }
924
925 /* record which output pad is now active */
926 priv->active_output_pad = local->index;
927
928 /* set CSI destination */
929 if (local->index == CSI_SRC_PAD_IDMAC) {
930 if (!is_media_entity_v4l2_video_device(remote->entity)) {
931 ret = -EINVAL;
932 goto out;
933 }
934
935 if (priv->fim) {
936 ret = imx_media_fim_add_controls(priv->fim);
937 if (ret)
938 goto out;
939 }
940
941 priv->dest = IPU_CSI_DEST_IDMAC;
942 } else {
943 if (!is_media_entity_v4l2_subdev(remote->entity)) {
944 ret = -EINVAL;
945 goto out;
946 }
947
948 remote_sd = media_entity_to_v4l2_subdev(remote->entity);
949 switch (remote_sd->grp_id) {
950 case IMX_MEDIA_GRP_ID_VDIC:
951 priv->dest = IPU_CSI_DEST_VDIC;
952 break;
953 case IMX_MEDIA_GRP_ID_IC_PRP:
954 priv->dest = IPU_CSI_DEST_IC;
955 break;
956 default:
957 ret = -EINVAL;
958 goto out;
959 }
960 }
961
962 priv->sink = remote->entity;
963out:
964 mutex_unlock(&priv->lock);
965 return ret;
966}
967
968static int csi_link_validate(struct v4l2_subdev *sd,
969 struct media_link *link,
970 struct v4l2_subdev_format *source_fmt,
971 struct v4l2_subdev_format *sink_fmt)
972{
973 struct csi_priv *priv = v4l2_get_subdevdata(sd);
974 struct v4l2_fwnode_endpoint *sensor_ep;
c8da8c03 975 const struct imx_media_pixfmt *incc;
4a34ec8e
SL		 976 struct imx_media_subdev *sensor;
977 bool is_csi2;
978 int ret;
979
980 ret = v4l2_subdev_link_validate_default(sd, link,
981 source_fmt, sink_fmt);
982 if (ret)
983 return ret;
984
985 sensor = __imx_media_find_sensor(priv->md, &priv->sd.entity);
986 if (IS_ERR(sensor)) {
987 v4l2_err(&priv->sd, "no sensor attached\n");
13109fbc 988 return PTR_ERR(sensor);
4a34ec8e
SL		 989 }
990
991 mutex_lock(&priv->lock);
992
993 priv->sensor = sensor;
994 sensor_ep = &priv->sensor->sensor_ep;
995 is_csi2 = (sensor_ep->bus_type == V4L2_MBUS_CSI2);
c8da8c03
RK		 996 incc = priv->cc[CSI_SINK_PAD];
997
998 if (priv->dest != IPU_CSI_DEST_IDMAC &&
999 (incc->bayer || (!is_csi2 &&
1000 sensor_ep->bus.parallel.bus_width >= 16))) {
1001 v4l2_err(&priv->sd,
1002 "bayer/16-bit parallel buses must go to IDMAC pad\n");
1003 ret = -EINVAL;
1004 goto out;
1005 }
4a34ec8e
SL		 1006
1007 if (is_csi2) {
1008 int vc_num = 0;
1009 /*
1010 * NOTE! It seems the virtual channels from the mipi csi-2
1011 * receiver are used only for routing by the video mux's,
1012 * or for hard-wired routing to the CSI's. Once the stream
1013 * enters the CSI's however, they are treated internally
1014 * in the IPU as virtual channel 0.
1015 */
1016#if 0
1017 mutex_unlock(&priv->lock);
1018 vc_num = imx_media_find_mipi_csi2_channel(priv->md,
1019 &priv->sd.entity);
1020 if (vc_num < 0)
1021 return vc_num;
1022 mutex_lock(&priv->lock);
1023#endif
1024 ipu_csi_set_mipi_datatype(priv->csi, vc_num,
1025 &priv->format_mbus[CSI_SINK_PAD]);
1026 }
1027
1028 /* select either parallel or MIPI-CSI2 as input to CSI */
1029 ipu_set_csi_src_mux(priv->ipu, priv->csi_id, is_csi2);
c8da8c03 1030out:
4a34ec8e
SL		 1031 mutex_unlock(&priv->lock);
1032 return ret;
1033}
1034
1035static struct v4l2_mbus_framefmt *
1036__csi_get_fmt(struct csi_priv *priv, struct v4l2_subdev_pad_config *cfg,
1037 unsigned int pad, enum v4l2_subdev_format_whence which)
1038{
1039 if (which == V4L2_SUBDEV_FORMAT_TRY)
1040 return v4l2_subdev_get_try_format(&priv->sd, cfg, pad);
1041 else
1042 return &priv->format_mbus[pad];
1043}
1044
1045static struct v4l2_rect *
1046__csi_get_crop(struct csi_priv *priv, struct v4l2_subdev_pad_config *cfg,
1047 enum v4l2_subdev_format_whence which)
1048{
1049 if (which == V4L2_SUBDEV_FORMAT_TRY)
1050 return v4l2_subdev_get_try_crop(&priv->sd, cfg, CSI_SINK_PAD);
1051 else
1052 return &priv->crop;
1053}
1054
69e78611
PZ		 1055static struct v4l2_rect *
1056__csi_get_compose(struct csi_priv *priv, struct v4l2_subdev_pad_config *cfg,
1057 enum v4l2_subdev_format_whence which)
1058{
1059 if (which == V4L2_SUBDEV_FORMAT_TRY)
1060 return v4l2_subdev_get_try_compose(&priv->sd, cfg,
1061 CSI_SINK_PAD);
1062 else
1063 return &priv->compose;
1064}
1065
4a34ec8e
SL		 1066static void csi_try_crop(struct csi_priv *priv,
1067 struct v4l2_rect *crop,
1068 struct v4l2_subdev_pad_config *cfg,
1069 struct v4l2_mbus_framefmt *infmt,
1070 struct imx_media_subdev *sensor)
1071{
1072 struct v4l2_fwnode_endpoint *sensor_ep;
1073
1074 sensor_ep = &sensor->sensor_ep;
1075
1076 crop->width = min_t(__u32, infmt->width, crop->width);
1077 if (crop->left + crop->width > infmt->width)
1078 crop->left = infmt->width - crop->width;
1079 /* adjust crop left/width to h/w alignment restrictions */
1080 crop->left &= ~0x3;
1081 crop->width &= ~0x7;
1082
1083 /*
1084 * FIXME: not sure why yet, but on interlaced bt.656,
1085 * changing the vertical cropping causes loss of vertical
1086 * sync, so fix it to NTSC/PAL active lines. NTSC contains
1087 * 2 extra lines of active video that need to be cropped.
1088 */
1089 if (sensor_ep->bus_type == V4L2_MBUS_BT656 &&
1090 (V4L2_FIELD_HAS_BOTH(infmt->field) ||
1091 infmt->field == V4L2_FIELD_ALTERNATE)) {
1092 crop->height = infmt->height;
1093 crop->top = (infmt->height == 480) ? 2 : 0;
1094 } else {
1095 crop->height = min_t(__u32, infmt->height, crop->height);
1096 if (crop->top + crop->height > infmt->height)
1097 crop->top = infmt->height - crop->height;
1098 }
1099}
1100
1101static int csi_enum_mbus_code(struct v4l2_subdev *sd,
1102 struct v4l2_subdev_pad_config *cfg,
1103 struct v4l2_subdev_mbus_code_enum *code)
1104{
1105 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1106 const struct imx_media_pixfmt *incc;
1107 struct v4l2_mbus_framefmt *infmt;
1108 int ret = 0;
1109
1110 mutex_lock(&priv->lock);
1111
1112 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, code->which);
1113 incc = imx_media_find_mbus_format(infmt->code, CS_SEL_ANY, true);
1114
1115 switch (code->pad) {
1116 case CSI_SINK_PAD:
1117 ret = imx_media_enum_mbus_format(&code->code, code->index,
1118 CS_SEL_ANY, true);
1119 break;
1120 case CSI_SRC_PAD_DIRECT:
1121 case CSI_SRC_PAD_IDMAC:
1122 if (incc->bayer) {
1123 if (code->index != 0) {
1124 ret = -EINVAL;
1125 goto out;
1126 }
1127 code->code = infmt->code;
1128 } else {
1129 u32 cs_sel = (incc->cs == IPUV3_COLORSPACE_YUV) ?
1130 CS_SEL_YUV : CS_SEL_RGB;
1131 ret = imx_media_enum_ipu_format(&code->code,
1132 code->index,
1133 cs_sel);
1134 }
1135 break;
1136 default:
1137 ret = -EINVAL;
1138 }
1139
1140out:
1141 mutex_unlock(&priv->lock);
1142 return ret;
1143}
1144
949ffdbf
RK		 1145static int csi_enum_frame_size(struct v4l2_subdev *sd,
1146 struct v4l2_subdev_pad_config *cfg,
1147 struct v4l2_subdev_frame_size_enum *fse)
1148{
1149 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1150 struct v4l2_rect *crop;
1151 int ret = 0;
1152
1153 if (fse->pad >= CSI_NUM_PADS ||
1154 fse->index > (fse->pad == CSI_SINK_PAD ? 0 : 3))
1155 return -EINVAL;
1156
1157 mutex_lock(&priv->lock);
1158
1159 if (fse->pad == CSI_SINK_PAD) {
1160 fse->min_width = MIN_W;
1161 fse->max_width = MAX_W;
1162 fse->min_height = MIN_H;
1163 fse->max_height = MAX_H;
1164 } else {
1165 crop = __csi_get_crop(priv, cfg, fse->which);
1166
1167 fse->min_width = fse->max_width = fse->index & 1 ?
1168 crop->width / 2 : crop->width;
1169 fse->min_height = fse->max_height = fse->index & 2 ?
1170 crop->height / 2 : crop->height;
1171 }
1172
1173 mutex_unlock(&priv->lock);
1174 return ret;
1175}
1176
1177static int csi_enum_frame_interval(struct v4l2_subdev *sd,
1178 struct v4l2_subdev_pad_config *cfg,
1179 struct v4l2_subdev_frame_interval_enum *fie)
1180{
1181 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1182 struct v4l2_fract *input_fi;
1183 struct v4l2_rect *crop;
1184 int ret = 0;
1185
1186 if (fie->pad >= CSI_NUM_PADS ||
1187 fie->index >= (fie->pad != CSI_SRC_PAD_IDMAC ?
1188 1 : ARRAY_SIZE(csi_skip)))
1189 return -EINVAL;
1190
1191 mutex_lock(&priv->lock);
1192
1193 input_fi = &priv->frame_interval[CSI_SINK_PAD];
1194 crop = __csi_get_crop(priv, cfg, fie->which);
1195
1196 if ((fie->width != crop->width && fie->width != crop->width / 2) ||
1197 (fie->height != crop->height && fie->height != crop->height / 2)) {
1198 ret = -EINVAL;
1199 goto out;
1200 }
1201
1202 fie->interval = *input_fi;
1203
1204 if (fie->pad == CSI_SRC_PAD_IDMAC)
1205 csi_apply_skip_interval(&csi_skip[fie->index],
1206 &fie->interval);
1207
1208out:
1209 mutex_unlock(&priv->lock);
1210 return ret;
1211}
1212
4a34ec8e
SL		 1213static int csi_get_fmt(struct v4l2_subdev *sd,
1214 struct v4l2_subdev_pad_config *cfg,
1215 struct v4l2_subdev_format *sdformat)
1216{
1217 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1218 struct v4l2_mbus_framefmt *fmt;
1219 int ret = 0;
1220
1221 if (sdformat->pad >= CSI_NUM_PADS)
1222 return -EINVAL;
1223
1224 mutex_lock(&priv->lock);
1225
1226 fmt = __csi_get_fmt(priv, cfg, sdformat->pad, sdformat->which);
1227 if (!fmt) {
1228 ret = -EINVAL;
1229 goto out;
1230 }
1231
1232 sdformat->format = *fmt;
1233out:
1234 mutex_unlock(&priv->lock);
1235 return ret;
1236}
1237
1238static void csi_try_fmt(struct csi_priv *priv,
1239 struct imx_media_subdev *sensor,
1240 struct v4l2_subdev_pad_config *cfg,
1241 struct v4l2_subdev_format *sdformat,
1242 struct v4l2_rect *crop,
69e78611 1243 struct v4l2_rect *compose,
4a34ec8e
SL		 1244 const struct imx_media_pixfmt **cc)
1245{
1246 const struct imx_media_pixfmt *incc;
1247 struct v4l2_mbus_framefmt *infmt;
1248 u32 code;
1249
21e54111
SL		 1250 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, sdformat->which);
1251
4a34ec8e
SL		 1252 switch (sdformat->pad) {
1253 case CSI_SRC_PAD_DIRECT:
1254 case CSI_SRC_PAD_IDMAC:
4a34ec8e
SL		 1255 incc = imx_media_find_mbus_format(infmt->code,
1256 CS_SEL_ANY, true);
1257
69e78611
PZ		 1258 sdformat->format.width = compose->width;
1259 sdformat->format.height = compose->height;
4a34ec8e
SL		 1260
1261 if (incc->bayer) {
1262 sdformat->format.code = infmt->code;
1263 *cc = incc;
1264 } else {
1265 u32 cs_sel = (incc->cs == IPUV3_COLORSPACE_YUV) ?
1266 CS_SEL_YUV : CS_SEL_RGB;
1267
1268 *cc = imx_media_find_ipu_format(sdformat->format.code,
1269 cs_sel);
1270 if (!*cc) {
1271 imx_media_enum_ipu_format(&code, 0, cs_sel);
1272 *cc = imx_media_find_ipu_format(code, cs_sel);
1273 sdformat->format.code = (*cc)->codes[0];
1274 }
1275 }
1276
1277 if (sdformat->pad == CSI_SRC_PAD_DIRECT ||
1278 sdformat->format.field != V4L2_FIELD_NONE)
1279 sdformat->format.field = infmt->field;
1280
1281 /*
1282 * translate V4L2_FIELD_ALTERNATE to SEQ_TB or SEQ_BT
1283 * depending on input height (assume NTSC top-bottom
1284 * order if 480 lines, otherwise PAL bottom-top order).
1285 */
1286 if (sdformat->format.field == V4L2_FIELD_ALTERNATE) {
1287 sdformat->format.field = (infmt->height == 480) ?
1288 V4L2_FIELD_SEQ_TB : V4L2_FIELD_SEQ_BT;
1289 }
21e54111
SL		 1290
1291 /* propagate colorimetry from sink */
1292 sdformat->format.colorspace = infmt->colorspace;
1293 sdformat->format.xfer_func = infmt->xfer_func;
1294 sdformat->format.quantization = infmt->quantization;
1295 sdformat->format.ycbcr_enc = infmt->ycbcr_enc;
4a34ec8e
SL		 1296 break;
1297 case CSI_SINK_PAD:
1298 v4l_bound_align_image(&sdformat->format.width, MIN_W, MAX_W,
1299 W_ALIGN, &sdformat->format.height,
1300 MIN_H, MAX_H, H_ALIGN, S_ALIGN);
69e78611
PZ		 1301
1302 /* Reset crop and compose rectangles */
4a34ec8e
SL		 1303 crop->left = 0;
1304 crop->top = 0;
1305 crop->width = sdformat->format.width;
1306 crop->height = sdformat->format.height;
1307 csi_try_crop(priv, crop, cfg, &sdformat->format, sensor);
69e78611
PZ		 1308 compose->left = 0;
1309 compose->top = 0;
1310 compose->width = crop->width;
1311 compose->height = crop->height;
4a34ec8e
SL		 1312
1313 *cc = imx_media_find_mbus_format(sdformat->format.code,
1314 CS_SEL_ANY, true);
1315 if (!*cc) {
1316 imx_media_enum_mbus_format(&code, 0,
1317 CS_SEL_ANY, false);
1318 *cc = imx_media_find_mbus_format(code,
1319 CS_SEL_ANY, false);
1320 sdformat->format.code = (*cc)->codes[0];
1321 }
21e54111
SL		 1322
1323 imx_media_fill_default_mbus_fields(
1324 &sdformat->format, infmt,
1325 priv->active_output_pad == CSI_SRC_PAD_DIRECT);
4a34ec8e
SL		 1326 break;
1327 }
1328}
1329
1330static int csi_set_fmt(struct v4l2_subdev *sd,
1331 struct v4l2_subdev_pad_config *cfg,
1332 struct v4l2_subdev_format *sdformat)
1333{
1334 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1335 struct imx_media_video_dev *vdev = priv->vdev;
1336 const struct imx_media_pixfmt *cc;
1337 struct imx_media_subdev *sensor;
1338 struct v4l2_pix_format vdev_fmt;
1339 struct v4l2_mbus_framefmt *fmt;
69e78611 1340 struct v4l2_rect *crop, *compose;
4a34ec8e
SL		 1341 int ret = 0;
1342
1343 if (sdformat->pad >= CSI_NUM_PADS)
1344 return -EINVAL;
1345
1346 sensor = imx_media_find_sensor(priv->md, &priv->sd.entity);
1347 if (IS_ERR(sensor)) {
1348 v4l2_err(&priv->sd, "no sensor attached\n");
1349 return PTR_ERR(sensor);
1350 }
1351
1352 mutex_lock(&priv->lock);
1353
1354 if (priv->stream_count > 0) {
1355 ret = -EBUSY;
1356 goto out;
1357 }
1358
1359 crop = __csi_get_crop(priv, cfg, sdformat->which);
69e78611 1360 compose = __csi_get_compose(priv, cfg, sdformat->which);
4a34ec8e 1361
69e78611 1362 csi_try_fmt(priv, sensor, cfg, sdformat, crop, compose, &cc);
4a34ec8e
SL		 1363
1364 fmt = __csi_get_fmt(priv, cfg, sdformat->pad, sdformat->which);
1365 *fmt = sdformat->format;
1366
1367 if (sdformat->pad == CSI_SINK_PAD) {
1368 int pad;
1369
1370 /* propagate format to source pads */
1371 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) {
1372 const struct imx_media_pixfmt *outcc;
1373 struct v4l2_mbus_framefmt *outfmt;
1374 struct v4l2_subdev_format format;
1375
1376 format.pad = pad;
1377 format.which = sdformat->which;
1378 format.format = sdformat->format;
69e78611
PZ		 1379 csi_try_fmt(priv, sensor, cfg, &format, NULL, compose,
1380 &outcc);
4a34ec8e
SL		 1381
1382 outfmt = __csi_get_fmt(priv, cfg, pad, sdformat->which);
1383 *outfmt = format.format;
1384
1385 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
1386 priv->cc[pad] = outcc;
1387 }
1388 }
1389
1390 if (sdformat->which == V4L2_SUBDEV_FORMAT_TRY)
1391 goto out;
1392
1393 priv->cc[sdformat->pad] = cc;
1394
1395 /* propagate IDMAC output pad format to capture device */
1396 imx_media_mbus_fmt_to_pix_fmt(&vdev_fmt,
1397 &priv->format_mbus[CSI_SRC_PAD_IDMAC],
1398 priv->cc[CSI_SRC_PAD_IDMAC]);
1399 mutex_unlock(&priv->lock);
1400 imx_media_capture_device_set_format(vdev, &vdev_fmt);
1401
1402 return 0;
1403out:
1404 mutex_unlock(&priv->lock);
1405 return ret;
1406}
1407
1408static int csi_get_selection(struct v4l2_subdev *sd,
1409 struct v4l2_subdev_pad_config *cfg,
1410 struct v4l2_subdev_selection *sel)
1411{
1412 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1413 struct v4l2_mbus_framefmt *infmt;
69e78611 1414 struct v4l2_rect *crop, *compose;
4a34ec8e
SL		 1415 int ret = 0;
1416
69e78611 1417 if (sel->pad != CSI_SINK_PAD)
4a34ec8e
SL		 1418 return -EINVAL;
1419
1420 mutex_lock(&priv->lock);
1421
1422 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, sel->which);
1423 crop = __csi_get_crop(priv, cfg, sel->which);
69e78611 1424 compose = __csi_get_compose(priv, cfg, sel->which);
4a34ec8e
SL		 1425
1426 switch (sel->target) {
1427 case V4L2_SEL_TGT_CROP_BOUNDS:
1428 sel->r.left = 0;
1429 sel->r.top = 0;
1430 sel->r.width = infmt->width;
1431 sel->r.height = infmt->height;
1432 break;
1433 case V4L2_SEL_TGT_CROP:
1434 sel->r = *crop;
1435 break;
69e78611
PZ		 1436 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
1437 sel->r.left = 0;
1438 sel->r.top = 0;
1439 sel->r.width = crop->width;
1440 sel->r.height = crop->height;
1441 break;
1442 case V4L2_SEL_TGT_COMPOSE:
1443 sel->r = *compose;
1444 break;
4a34ec8e
SL		 1445 default:
1446 ret = -EINVAL;
1447 }
1448
1449 mutex_unlock(&priv->lock);
1450 return ret;
1451}
1452
69e78611
PZ		 1453static int csi_set_scale(u32 *compose, u32 crop, u32 flags)
1454{
1455 if ((flags & (V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE)) ==
1456 (V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE) &&
1457 *compose != crop && *compose != crop / 2)
1458 return -ERANGE;
1459
1460 if (*compose <= crop / 2 ||
1461 (*compose < crop * 3 / 4 && !(flags & V4L2_SEL_FLAG_GE)) ||
1462 (*compose < crop && (flags & V4L2_SEL_FLAG_LE)))
1463 *compose = crop / 2;
1464 else
1465 *compose = crop;
1466
1467 return 0;
1468}
1469
4a34ec8e
SL		 1470static int csi_set_selection(struct v4l2_subdev *sd,
1471 struct v4l2_subdev_pad_config *cfg,
1472 struct v4l2_subdev_selection *sel)
1473{
1474 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1475 struct v4l2_mbus_framefmt *infmt;
69e78611 1476 struct v4l2_rect *crop, *compose;
4a34ec8e 1477 struct imx_media_subdev *sensor;
4a34ec8e
SL		 1478 int pad, ret = 0;
1479
69e78611 1480 if (sel->pad != CSI_SINK_PAD)
4a34ec8e
SL		 1481 return -EINVAL;
1482
1483 sensor = imx_media_find_sensor(priv->md, &priv->sd.entity);
1484 if (IS_ERR(sensor)) {
1485 v4l2_err(&priv->sd, "no sensor attached\n");
1486 return PTR_ERR(sensor);
1487 }
1488
1489 mutex_lock(&priv->lock);
1490
1491 if (priv->stream_count > 0) {
1492 ret = -EBUSY;
1493 goto out;
1494 }
1495
1496 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, sel->which);
1497 crop = __csi_get_crop(priv, cfg, sel->which);
69e78611 1498 compose = __csi_get_compose(priv, cfg, sel->which);
4a34ec8e 1499
69e78611
PZ		 1500 switch (sel->target) {
1501 case V4L2_SEL_TGT_CROP:
1502 /*
1503 * Modifying the crop rectangle always changes the format on
1504 * the source pads. If the KEEP_CONFIG flag is set, just return
1505 * the current crop rectangle.
1506 */
1507 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) {
1508 sel->r = priv->crop;
1509 if (sel->which == V4L2_SUBDEV_FORMAT_TRY)
1510 *crop = sel->r;
1511 goto out;
1512 }
1513
1514 csi_try_crop(priv, &sel->r, cfg, infmt, sensor);
1515
1516 *crop = sel->r;
1517
1518 /* Reset scaling to 1:1 */
1519 compose->width = crop->width;
1520 compose->height = crop->height;
1521 break;
1522 case V4L2_SEL_TGT_COMPOSE:
1523 /*
1524 * Modifying the compose rectangle always changes the format on
1525 * the source pads. If the KEEP_CONFIG flag is set, just return
1526 * the current compose rectangle.
1527 */
1528 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) {
1529 sel->r = priv->compose;
1530 if (sel->which == V4L2_SUBDEV_FORMAT_TRY)
1531 *compose = sel->r;
1532 goto out;
1533 }
4a34ec8e 1534
69e78611
PZ		 1535 sel->r.left = 0;
1536 sel->r.top = 0;
1537 ret = csi_set_scale(&sel->r.width, crop->width, sel->flags);
1538 if (ret)
1539 goto out;
1540 ret = csi_set_scale(&sel->r.height, crop->height, sel->flags);
1541 if (ret)
1542 goto out;
4a34ec8e 1543
69e78611
PZ		 1544 *compose = sel->r;
1545 break;
1546 default:
1547 ret = -EINVAL;
1548 goto out;
1549 }
4a34ec8e 1550
69e78611 1551 /* Reset source pads to sink compose rectangle */
4a34ec8e
SL		 1552 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) {
1553 struct v4l2_mbus_framefmt *outfmt;
1554
1555 outfmt = __csi_get_fmt(priv, cfg, pad, sel->which);
69e78611
PZ		 1556 outfmt->width = compose->width;
1557 outfmt->height = compose->height;
4a34ec8e
SL		 1558 }
1559
1560out:
1561 mutex_unlock(&priv->lock);
1562 return ret;
1563}
1564
1565static int csi_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
1566 struct v4l2_event_subscription *sub)
1567{
1568 if (sub->type != V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR)
1569 return -EINVAL;
1570 if (sub->id != 0)
1571 return -EINVAL;
1572
1573 return v4l2_event_subscribe(fh, sub, 0, NULL);
1574}
1575
1576static int csi_unsubscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
1577 struct v4l2_event_subscription *sub)
1578{
1579 return v4l2_event_unsubscribe(fh, sub);
1580}
1581
1582/*
1583 * retrieve our pads parsed from the OF graph by the media device
1584 */
1585static int csi_registered(struct v4l2_subdev *sd)
1586{
1587 struct csi_priv *priv = v4l2_get_subdevdata(sd);
0b2e9e79 1588 struct ipu_csi *csi;
4a34ec8e
SL		 1589 int i, ret;
1590 u32 code;
1591
1592 /* get media device */
1593 priv->md = dev_get_drvdata(sd->v4l2_dev->dev);
1594
1595 /* get handle to IPU CSI */
0b2e9e79
AB		 1596 csi = ipu_csi_get(priv->ipu, priv->csi_id);
1597 if (IS_ERR(csi)) {
4a34ec8e 1598 v4l2_err(&priv->sd, "failed to get CSI%d\n", priv->csi_id);
0b2e9e79 1599 return PTR_ERR(csi);
4a34ec8e 1600 }
0b2e9e79 1601 priv->csi = csi;
4a34ec8e
SL		 1602
1603 for (i = 0; i < CSI_NUM_PADS; i++) {
1604 priv->pad[i].flags = (i == CSI_SINK_PAD) ?
1605 MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE;
1606
1607 code = 0;
1608 if (i != CSI_SINK_PAD)
1609 imx_media_enum_ipu_format(&code, 0, CS_SEL_YUV);
1610
1611 /* set a default mbus format */
1612 ret = imx_media_init_mbus_fmt(&priv->format_mbus[i],
1613 640, 480, code, V4L2_FIELD_NONE,
1614 &priv->cc[i]);
1615 if (ret)
1616 goto put_csi;
fb30ee79
PZ		 1617
1618 /* init default frame interval */
1619 priv->frame_interval[i].numerator = 1;
1620 priv->frame_interval[i].denominator = 30;
4a34ec8e
SL		 1621 }
1622
fb30ee79
PZ		 1623 /* disable frame skipping */
1624 priv->skip = &csi_skip[0];
4a34ec8e 1625
69e78611
PZ		 1626 /* init default crop and compose rectangle sizes */
1627 priv->crop.width = 640;
1628 priv->crop.height = 480;
1629 priv->compose.width = 640;
1630 priv->compose.height = 480;
1631
4a34ec8e
SL		 1632 priv->fim = imx_media_fim_init(&priv->sd);
1633 if (IS_ERR(priv->fim)) {
1634 ret = PTR_ERR(priv->fim);
1635 goto put_csi;
1636 }
1637
1638 ret = media_entity_pads_init(&sd->entity, CSI_NUM_PADS, priv->pad);
1639 if (ret)
1640 goto free_fim;
1641
1642 ret = imx_media_capture_device_register(priv->vdev);
1643 if (ret)
1644 goto free_fim;
1645
1646 ret = imx_media_add_video_device(priv->md, priv->vdev);
1647 if (ret)
1648 goto unreg;
1649
1650 return 0;
1651unreg:
1652 imx_media_capture_device_unregister(priv->vdev);
1653free_fim:
1654 if (priv->fim)
1655 imx_media_fim_free(priv->fim);
1656put_csi:
1657 ipu_csi_put(priv->csi);
1658 return ret;
1659}
1660
1661static void csi_unregistered(struct v4l2_subdev *sd)
1662{
1663 struct csi_priv *priv = v4l2_get_subdevdata(sd);
1664
1665 imx_media_capture_device_unregister(priv->vdev);
1666
1667 if (priv->fim)
1668 imx_media_fim_free(priv->fim);
1669
0b2e9e79 1670 if (priv->csi)
4a34ec8e
SL		 1671 ipu_csi_put(priv->csi);
1672}
1673
1674static const struct media_entity_operations csi_entity_ops = {
1675 .link_setup = csi_link_setup,
1676 .link_validate = v4l2_subdev_link_validate,
1677};
1678
1679static const struct v4l2_subdev_core_ops csi_core_ops = {
1680 .subscribe_event = csi_subscribe_event,
1681 .unsubscribe_event = csi_unsubscribe_event,
1682};
1683
1684static const struct v4l2_subdev_video_ops csi_video_ops = {
1685 .g_frame_interval = csi_g_frame_interval,
1686 .s_frame_interval = csi_s_frame_interval,
1687 .s_stream = csi_s_stream,
1688};
1689
1690static const struct v4l2_subdev_pad_ops csi_pad_ops = {
1691 .enum_mbus_code = csi_enum_mbus_code,
949ffdbf
RK		 1692 .enum_frame_size = csi_enum_frame_size,
1693 .enum_frame_interval = csi_enum_frame_interval,
4a34ec8e
SL		 1694 .get_fmt = csi_get_fmt,
1695 .set_fmt = csi_set_fmt,
1696 .get_selection = csi_get_selection,
1697 .set_selection = csi_set_selection,
1698 .link_validate = csi_link_validate,
1699};
1700
1701static const struct v4l2_subdev_ops csi_subdev_ops = {
1702 .core = &csi_core_ops,
1703 .video = &csi_video_ops,
1704 .pad = &csi_pad_ops,
1705};
1706
1707static const struct v4l2_subdev_internal_ops csi_internal_ops = {
1708 .registered = csi_registered,
1709 .unregistered = csi_unregistered,
1710};
1711
1712static int imx_csi_probe(struct platform_device *pdev)
1713{
1714 struct ipu_client_platformdata *pdata;
1715 struct pinctrl *pinctrl;
1716 struct csi_priv *priv;
1717 int ret;
1718
1719 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
1720 if (!priv)
1721 return -ENOMEM;
1722
1723 platform_set_drvdata(pdev, &priv->sd);
1724 priv->dev = &pdev->dev;
1725
1726 ret = dma_set_coherent_mask(priv->dev, DMA_BIT_MASK(32));
1727 if (ret)
1728 return ret;
1729
1730 /* get parent IPU */
1731 priv->ipu = dev_get_drvdata(priv->dev->parent);
1732
1733 /* get our CSI id */
1734 pdata = priv->dev->platform_data;
1735 priv->csi_id = pdata->csi;
1736 priv->smfc_id = (priv->csi_id == 0) ? 0 : 2;
1737
e99e88a9 1738 timer_setup(&priv->eof_timeout_timer, csi_idmac_eof_timeout, 0);
4a34ec8e
SL		 1739 spin_lock_init(&priv->irqlock);
1740
1741 v4l2_subdev_init(&priv->sd, &csi_subdev_ops);
1742 v4l2_set_subdevdata(&priv->sd, priv);
1743 priv->sd.internal_ops = &csi_internal_ops;
1744 priv->sd.entity.ops = &csi_entity_ops;
1745 priv->sd.entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
1746 priv->sd.dev = &pdev->dev;
1747 priv->sd.fwnode = of_fwnode_handle(pdata->of_node);
1748 priv->sd.owner = THIS_MODULE;
1749 priv->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
1750 priv->sd.grp_id = priv->csi_id ?
1751 IMX_MEDIA_GRP_ID_CSI1 : IMX_MEDIA_GRP_ID_CSI0;
1752 imx_media_grp_id_to_sd_name(priv->sd.name, sizeof(priv->sd.name),
1753 priv->sd.grp_id, ipu_get_num(priv->ipu));
1754
1755 priv->vdev = imx_media_capture_device_init(&priv->sd,
1756 CSI_SRC_PAD_IDMAC);
1757 if (IS_ERR(priv->vdev))
1758 return PTR_ERR(priv->vdev);
1759
1760 mutex_init(&priv->lock);
1761
1762 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0);
1763 priv->sd.ctrl_handler = &priv->ctrl_hdlr;
1764
1765 /*
1766 * The IPUv3 driver did not assign an of_node to this
1767 * device. As a result, pinctrl does not automatically
1768 * configure our pin groups, so we need to do that manually
1769 * here, after setting this device's of_node.
1770 */
1771 priv->dev->of_node = pdata->of_node;
1772 pinctrl = devm_pinctrl_get_select_default(priv->dev);
1773
1774 ret = v4l2_async_register_subdev(&priv->sd);
1775 if (ret)
1776 goto free;
1777
1778 return 0;
1779free:
1780 v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
1781 mutex_destroy(&priv->lock);
1782 imx_media_capture_device_remove(priv->vdev);
1783 return ret;
1784}
1785
1786static int imx_csi_remove(struct platform_device *pdev)
1787{
1788 struct v4l2_subdev *sd = platform_get_drvdata(pdev);
1789 struct csi_priv *priv = sd_to_dev(sd);
1790
1791 v4l2_ctrl_handler_free(&priv->ctrl_hdlr);
1792 mutex_destroy(&priv->lock);
1793 imx_media_capture_device_remove(priv->vdev);
1794 v4l2_async_unregister_subdev(sd);
1795 media_entity_cleanup(&sd->entity);
1796
1797 return 0;
1798}
1799
1800static const struct platform_device_id imx_csi_ids[] = {
1801 { .name = "imx-ipuv3-csi" },
1802 { },
1803};
1804MODULE_DEVICE_TABLE(platform, imx_csi_ids);
1805
1806static struct platform_driver imx_csi_driver = {
1807 .probe = imx_csi_probe,
1808 .remove = imx_csi_remove,
1809 .id_table = imx_csi_ids,
1810 .driver = {
1811 .name = "imx-ipuv3-csi",
1812 },
1813};
1814module_platform_driver(imx_csi_driver);
1815
1816MODULE_DESCRIPTION("i.MX CSI subdev driver");
1817MODULE_AUTHOR("Steve Longerbeam <steve_longerbeam@mentor.com>");
1818MODULE_LICENSE("GPL");
1819MODULE_ALIAS("platform:imx-ipuv3-csi");
Linux 6.x block layer and io_uring tree(s)