1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * camss-csid.c
4 *
5 * Qualcomm MSM Camera Subsystem - CSID (CSI Decoder) Module
6 *
7 * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved.
8 * Copyright (C) 2015-2018 Linaro Ltd.
9 */
10 #include <linux/clk.h>
11 #include <linux/completion.h>
12 #include <linux/interrupt.h>
13 #include <linux/io.h>
14 #include <linux/kernel.h>
15 #include <linux/of.h>
16 #include <linux/platform_device.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/regulator/consumer.h>
19 #include <media/media-entity.h>
20 #include <media/v4l2-device.h>
21 #include <media/v4l2-event.h>
22 #include <media/v4l2-subdev.h>
23
24 #include "camss-csid.h"
25 #include "camss-csid-gen1.h"
26 #include "camss.h"
27
28 /* offset of CSID registers in VFE region for VFE 480 */
29 #define VFE_480_CSID_OFFSET 0x1200
30 #define VFE_480_LITE_CSID_OFFSET 0x200
31
32 #define MSM_CSID_NAME "msm_csid"
33
34 const char * const csid_testgen_modes[] = {
35 "Disabled",
36 "Incrementing",
37 "Alternating 0x55/0xAA",
38 "All Zeros 0x00",
39 "All Ones 0xFF",
40 "Pseudo-random Data",
41 "User Specified",
42 "Complex pattern",
43 "Color box",
44 "Color bars",
45 NULL
46 };
47
csid_find_code(u32 * codes,unsigned int ncodes,unsigned int match_format_idx,u32 match_code)48 u32 csid_find_code(u32 *codes, unsigned int ncodes,
49 unsigned int match_format_idx, u32 match_code)
50 {
51 int i;
52
53 if (!match_code && (match_format_idx >= ncodes))
54 return 0;
55
56 for (i = 0; i < ncodes; i++)
57 if (match_code) {
58 if (codes[i] == match_code)
59 return match_code;
60 } else {
61 if (i == match_format_idx)
62 return codes[i];
63 }
64
65 return codes[0];
66 }
67
csid_get_fmt_entry(const struct csid_format * formats,unsigned int nformats,u32 code)68 const struct csid_format *csid_get_fmt_entry(const struct csid_format *formats,
69 unsigned int nformats,
70 u32 code)
71 {
72 unsigned int i;
73
74 for (i = 0; i < nformats; i++)
75 if (code == formats[i].code)
76 return &formats[i];
77
78 WARN(1, "Unknown format\n");
79
80 return &formats[0];
81 }
82
83 /*
84 * csid_set_clock_rates - Calculate and set clock rates on CSID module
85 * @csiphy: CSID device
86 */
csid_set_clock_rates(struct csid_device * csid)87 static int csid_set_clock_rates(struct csid_device *csid)
88 {
89 struct device *dev = csid->camss->dev;
90 const struct csid_format *fmt;
91 s64 link_freq;
92 int i, j;
93 int ret;
94
95 fmt = csid_get_fmt_entry(csid->formats, csid->nformats,
96 csid->fmt[MSM_CSIPHY_PAD_SINK].code);
97 link_freq = camss_get_link_freq(&csid->subdev.entity, fmt->bpp,
98 csid->phy.lane_cnt);
99 if (link_freq < 0)
100 link_freq = 0;
101
102 for (i = 0; i < csid->nclocks; i++) {
103 struct camss_clock *clock = &csid->clock[i];
104
105 if (!strcmp(clock->name, "csi0") ||
106 !strcmp(clock->name, "csi1") ||
107 !strcmp(clock->name, "csi2") ||
108 !strcmp(clock->name, "csi3")) {
109 u64 min_rate = link_freq / 4;
110 long rate;
111
112 camss_add_clock_margin(&min_rate);
113
114 for (j = 0; j < clock->nfreqs; j++)
115 if (min_rate < clock->freq[j])
116 break;
117
118 if (j == clock->nfreqs) {
119 dev_err(dev,
120 "Pixel clock is too high for CSID\n");
121 return -EINVAL;
122 }
123
124 /* if sensor pixel clock is not available */
125 /* set highest possible CSID clock rate */
126 if (min_rate == 0)
127 j = clock->nfreqs - 1;
128
129 rate = clk_round_rate(clock->clk, clock->freq[j]);
130 if (rate < 0) {
131 dev_err(dev, "clk round rate failed: %ld\n",
132 rate);
133 return -EINVAL;
134 }
135
136 ret = clk_set_rate(clock->clk, rate);
137 if (ret < 0) {
138 dev_err(dev, "clk set rate failed: %d\n", ret);
139 return ret;
140 }
141 } else if (clock->nfreqs) {
142 clk_set_rate(clock->clk, clock->freq[0]);
143 }
144 }
145
146 return 0;
147 }
148
149 /*
150 * csid_set_power - Power on/off CSID module
151 * @sd: CSID V4L2 subdevice
152 * @on: Requested power state
153 *
154 * Return 0 on success or a negative error code otherwise
155 */
csid_set_power(struct v4l2_subdev * sd,int on)156 static int csid_set_power(struct v4l2_subdev *sd, int on)
157 {
158 struct csid_device *csid = v4l2_get_subdevdata(sd);
159 struct camss *camss = csid->camss;
160 struct device *dev = camss->dev;
161 struct vfe_device *vfe = &camss->vfe[csid->id];
162 u32 version = camss->version;
163 int ret = 0;
164
165 if (on) {
166 if (version == CAMSS_8250 || version == CAMSS_845) {
167 ret = vfe_get(vfe);
168 if (ret < 0)
169 return ret;
170 }
171
172 ret = pm_runtime_resume_and_get(dev);
173 if (ret < 0)
174 return ret;
175
176 ret = regulator_bulk_enable(csid->num_supplies,
177 csid->supplies);
178 if (ret < 0) {
179 pm_runtime_put_sync(dev);
180 return ret;
181 }
182
183 ret = csid_set_clock_rates(csid);
184 if (ret < 0) {
185 regulator_bulk_disable(csid->num_supplies,
186 csid->supplies);
187 pm_runtime_put_sync(dev);
188 return ret;
189 }
190
191 ret = camss_enable_clocks(csid->nclocks, csid->clock, dev);
192 if (ret < 0) {
193 regulator_bulk_disable(csid->num_supplies,
194 csid->supplies);
195 pm_runtime_put_sync(dev);
196 return ret;
197 }
198
199 enable_irq(csid->irq);
200
201 ret = csid->ops->reset(csid);
202 if (ret < 0) {
203 disable_irq(csid->irq);
204 camss_disable_clocks(csid->nclocks, csid->clock);
205 regulator_bulk_disable(csid->num_supplies,
206 csid->supplies);
207 pm_runtime_put_sync(dev);
208 return ret;
209 }
210
211 csid->ops->hw_version(csid);
212 } else {
213 disable_irq(csid->irq);
214 camss_disable_clocks(csid->nclocks, csid->clock);
215 regulator_bulk_disable(csid->num_supplies,
216 csid->supplies);
217 pm_runtime_put_sync(dev);
218 if (version == CAMSS_8250 || version == CAMSS_845)
219 vfe_put(vfe);
220 }
221
222 return ret;
223 }
224
225 /*
226 * csid_set_stream - Enable/disable streaming on CSID module
227 * @sd: CSID V4L2 subdevice
228 * @enable: Requested streaming state
229 *
230 * Main configuration of CSID module is also done here.
231 *
232 * Return 0 on success or a negative error code otherwise
233 */
csid_set_stream(struct v4l2_subdev * sd,int enable)234 static int csid_set_stream(struct v4l2_subdev *sd, int enable)
235 {
236 struct csid_device *csid = v4l2_get_subdevdata(sd);
237 int ret;
238
239 if (enable) {
240 ret = v4l2_ctrl_handler_setup(&csid->ctrls);
241 if (ret < 0) {
242 dev_err(csid->camss->dev,
243 "could not sync v4l2 controls: %d\n", ret);
244 return ret;
245 }
246
247 if (!csid->testgen.enabled &&
248 !media_pad_remote_pad_first(&csid->pads[MSM_CSID_PAD_SINK]))
249 return -ENOLINK;
250 }
251
252 csid->ops->configure_stream(csid, enable);
253
254 return 0;
255 }
256
257 /*
258 * __csid_get_format - Get pointer to format structure
259 * @csid: CSID device
260 * @cfg: V4L2 subdev pad configuration
261 * @pad: pad from which format is requested
262 * @which: TRY or ACTIVE format
263 *
264 * Return pointer to TRY or ACTIVE format structure
265 */
266 static struct v4l2_mbus_framefmt *
__csid_get_format(struct csid_device * csid,struct v4l2_subdev_state * sd_state,unsigned int pad,enum v4l2_subdev_format_whence which)267 __csid_get_format(struct csid_device *csid,
268 struct v4l2_subdev_state *sd_state,
269 unsigned int pad,
270 enum v4l2_subdev_format_whence which)
271 {
272 if (which == V4L2_SUBDEV_FORMAT_TRY)
273 return v4l2_subdev_get_try_format(&csid->subdev, sd_state,
274 pad);
275
276 return &csid->fmt[pad];
277 }
278
279 /*
280 * csid_try_format - Handle try format by pad subdev method
281 * @csid: CSID device
282 * @cfg: V4L2 subdev pad configuration
283 * @pad: pad on which format is requested
284 * @fmt: pointer to v4l2 format structure
285 * @which: wanted subdev format
286 */
csid_try_format(struct csid_device * csid,struct v4l2_subdev_state * sd_state,unsigned int pad,struct v4l2_mbus_framefmt * fmt,enum v4l2_subdev_format_whence which)287 static void csid_try_format(struct csid_device *csid,
288 struct v4l2_subdev_state *sd_state,
289 unsigned int pad,
290 struct v4l2_mbus_framefmt *fmt,
291 enum v4l2_subdev_format_whence which)
292 {
293 unsigned int i;
294
295 switch (pad) {
296 case MSM_CSID_PAD_SINK:
297 /* Set format on sink pad */
298
299 for (i = 0; i < csid->nformats; i++)
300 if (fmt->code == csid->formats[i].code)
301 break;
302
303 /* If not found, use UYVY as default */
304 if (i >= csid->nformats)
305 fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
306
307 fmt->width = clamp_t(u32, fmt->width, 1, 8191);
308 fmt->height = clamp_t(u32, fmt->height, 1, 8191);
309
310 fmt->field = V4L2_FIELD_NONE;
311 fmt->colorspace = V4L2_COLORSPACE_SRGB;
312
313 break;
314
315 case MSM_CSID_PAD_SRC:
316 if (csid->testgen_mode->cur.val == 0) {
317 /* Test generator is disabled, */
318 /* keep pad formats in sync */
319 u32 code = fmt->code;
320
321 *fmt = *__csid_get_format(csid, sd_state,
322 MSM_CSID_PAD_SINK, which);
323 fmt->code = csid->ops->src_pad_code(csid, fmt->code, 0, code);
324 } else {
325 /* Test generator is enabled, set format on source */
326 /* pad to allow test generator usage */
327
328 for (i = 0; i < csid->nformats; i++)
329 if (csid->formats[i].code == fmt->code)
330 break;
331
332 /* If not found, use UYVY as default */
333 if (i >= csid->nformats)
334 fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
335
336 fmt->width = clamp_t(u32, fmt->width, 1, 8191);
337 fmt->height = clamp_t(u32, fmt->height, 1, 8191);
338
339 fmt->field = V4L2_FIELD_NONE;
340 }
341 break;
342 }
343
344 fmt->colorspace = V4L2_COLORSPACE_SRGB;
345 }
346
347 /*
348 * csid_enum_mbus_code - Handle pixel format enumeration
349 * @sd: CSID V4L2 subdevice
350 * @cfg: V4L2 subdev pad configuration
351 * @code: pointer to v4l2_subdev_mbus_code_enum structure
352 * return -EINVAL or zero on success
353 */
csid_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)354 static int csid_enum_mbus_code(struct v4l2_subdev *sd,
355 struct v4l2_subdev_state *sd_state,
356 struct v4l2_subdev_mbus_code_enum *code)
357 {
358 struct csid_device *csid = v4l2_get_subdevdata(sd);
359
360 if (code->pad == MSM_CSID_PAD_SINK) {
361 if (code->index >= csid->nformats)
362 return -EINVAL;
363
364 code->code = csid->formats[code->index].code;
365 } else {
366 if (csid->testgen_mode->cur.val == 0) {
367 struct v4l2_mbus_framefmt *sink_fmt;
368
369 sink_fmt = __csid_get_format(csid, sd_state,
370 MSM_CSID_PAD_SINK,
371 code->which);
372
373 code->code = csid->ops->src_pad_code(csid, sink_fmt->code,
374 code->index, 0);
375 if (!code->code)
376 return -EINVAL;
377 } else {
378 if (code->index >= csid->nformats)
379 return -EINVAL;
380
381 code->code = csid->formats[code->index].code;
382 }
383 }
384
385 return 0;
386 }
387
388 /*
389 * csid_enum_frame_size - Handle frame size enumeration
390 * @sd: CSID V4L2 subdevice
391 * @cfg: V4L2 subdev pad configuration
392 * @fse: pointer to v4l2_subdev_frame_size_enum structure
393 * return -EINVAL or zero on success
394 */
csid_enum_frame_size(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_frame_size_enum * fse)395 static int csid_enum_frame_size(struct v4l2_subdev *sd,
396 struct v4l2_subdev_state *sd_state,
397 struct v4l2_subdev_frame_size_enum *fse)
398 {
399 struct csid_device *csid = v4l2_get_subdevdata(sd);
400 struct v4l2_mbus_framefmt format;
401
402 if (fse->index != 0)
403 return -EINVAL;
404
405 format.code = fse->code;
406 format.width = 1;
407 format.height = 1;
408 csid_try_format(csid, sd_state, fse->pad, &format, fse->which);
409 fse->min_width = format.width;
410 fse->min_height = format.height;
411
412 if (format.code != fse->code)
413 return -EINVAL;
414
415 format.code = fse->code;
416 format.width = -1;
417 format.height = -1;
418 csid_try_format(csid, sd_state, fse->pad, &format, fse->which);
419 fse->max_width = format.width;
420 fse->max_height = format.height;
421
422 return 0;
423 }
424
425 /*
426 * csid_get_format - Handle get format by pads subdev method
427 * @sd: CSID V4L2 subdevice
428 * @cfg: V4L2 subdev pad configuration
429 * @fmt: pointer to v4l2 subdev format structure
430 *
431 * Return -EINVAL or zero on success
432 */
csid_get_format(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)433 static int csid_get_format(struct v4l2_subdev *sd,
434 struct v4l2_subdev_state *sd_state,
435 struct v4l2_subdev_format *fmt)
436 {
437 struct csid_device *csid = v4l2_get_subdevdata(sd);
438 struct v4l2_mbus_framefmt *format;
439
440 format = __csid_get_format(csid, sd_state, fmt->pad, fmt->which);
441 if (format == NULL)
442 return -EINVAL;
443
444 fmt->format = *format;
445
446 return 0;
447 }
448
449 /*
450 * csid_set_format - Handle set format by pads subdev method
451 * @sd: CSID V4L2 subdevice
452 * @cfg: V4L2 subdev pad configuration
453 * @fmt: pointer to v4l2 subdev format structure
454 *
455 * Return -EINVAL or zero on success
456 */
csid_set_format(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)457 static int csid_set_format(struct v4l2_subdev *sd,
458 struct v4l2_subdev_state *sd_state,
459 struct v4l2_subdev_format *fmt)
460 {
461 struct csid_device *csid = v4l2_get_subdevdata(sd);
462 struct v4l2_mbus_framefmt *format;
463
464 format = __csid_get_format(csid, sd_state, fmt->pad, fmt->which);
465 if (format == NULL)
466 return -EINVAL;
467
468 csid_try_format(csid, sd_state, fmt->pad, &fmt->format, fmt->which);
469 *format = fmt->format;
470
471 /* Propagate the format from sink to source */
472 if (fmt->pad == MSM_CSID_PAD_SINK) {
473 format = __csid_get_format(csid, sd_state, MSM_CSID_PAD_SRC,
474 fmt->which);
475
476 *format = fmt->format;
477 csid_try_format(csid, sd_state, MSM_CSID_PAD_SRC, format,
478 fmt->which);
479 }
480
481 return 0;
482 }
483
484 /*
485 * csid_init_formats - Initialize formats on all pads
486 * @sd: CSID V4L2 subdevice
487 * @fh: V4L2 subdev file handle
488 *
489 * Initialize all pad formats with default values.
490 *
491 * Return 0 on success or a negative error code otherwise
492 */
csid_init_formats(struct v4l2_subdev * sd,struct v4l2_subdev_fh * fh)493 static int csid_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
494 {
495 struct v4l2_subdev_format format = {
496 .pad = MSM_CSID_PAD_SINK,
497 .which = fh ? V4L2_SUBDEV_FORMAT_TRY :
498 V4L2_SUBDEV_FORMAT_ACTIVE,
499 .format = {
500 .code = MEDIA_BUS_FMT_UYVY8_2X8,
501 .width = 1920,
502 .height = 1080
503 }
504 };
505
506 return csid_set_format(sd, fh ? fh->state : NULL, &format);
507 }
508
509 /*
510 * csid_set_test_pattern - Set test generator's pattern mode
511 * @csid: CSID device
512 * @value: desired test pattern mode
513 *
514 * Return 0 on success or a negative error code otherwise
515 */
csid_set_test_pattern(struct csid_device * csid,s32 value)516 static int csid_set_test_pattern(struct csid_device *csid, s32 value)
517 {
518 struct csid_testgen_config *tg = &csid->testgen;
519
520 /* If CSID is linked to CSIPHY, do not allow to enable test generator */
521 if (value && media_pad_remote_pad_first(&csid->pads[MSM_CSID_PAD_SINK]))
522 return -EBUSY;
523
524 tg->enabled = !!value;
525
526 return csid->ops->configure_testgen_pattern(csid, value);
527 }
528
529 /*
530 * csid_s_ctrl - Handle set control subdev method
531 * @ctrl: pointer to v4l2 control structure
532 *
533 * Return 0 on success or a negative error code otherwise
534 */
csid_s_ctrl(struct v4l2_ctrl * ctrl)535 static int csid_s_ctrl(struct v4l2_ctrl *ctrl)
536 {
537 struct csid_device *csid = container_of(ctrl->handler,
538 struct csid_device, ctrls);
539 int ret = -EINVAL;
540
541 switch (ctrl->id) {
542 case V4L2_CID_TEST_PATTERN:
543 ret = csid_set_test_pattern(csid, ctrl->val);
544 break;
545 }
546
547 return ret;
548 }
549
550 static const struct v4l2_ctrl_ops csid_ctrl_ops = {
551 .s_ctrl = csid_s_ctrl,
552 };
553
554 /*
555 * msm_csid_subdev_init - Initialize CSID device structure and resources
556 * @csid: CSID device
557 * @res: CSID module resources table
558 * @id: CSID module id
559 *
560 * Return 0 on success or a negative error code otherwise
561 */
msm_csid_subdev_init(struct camss * camss,struct csid_device * csid,const struct resources * res,u8 id)562 int msm_csid_subdev_init(struct camss *camss, struct csid_device *csid,
563 const struct resources *res, u8 id)
564 {
565 struct device *dev = camss->dev;
566 struct platform_device *pdev = to_platform_device(dev);
567 int i, j;
568 int ret;
569
570 csid->camss = camss;
571 csid->id = id;
572
573 if (camss->version == CAMSS_8x16) {
574 csid->ops = &csid_ops_4_1;
575 } else if (camss->version == CAMSS_8x96 ||
576 camss->version == CAMSS_660) {
577 csid->ops = &csid_ops_4_7;
578 } else if (camss->version == CAMSS_845 ||
579 camss->version == CAMSS_8250) {
580 csid->ops = &csid_ops_gen2;
581 } else {
582 return -EINVAL;
583 }
584 csid->ops->subdev_init(csid);
585
586 /* Memory */
587
588 if (camss->version == CAMSS_8250) {
589 /* for titan 480, CSID registers are inside the VFE region,
590 * between the VFE "top" and "bus" registers. this requires
591 * VFE to be initialized before CSID
592 */
593 if (id >= 2) /* VFE/CSID lite */
594 csid->base = camss->vfe[id].base + VFE_480_LITE_CSID_OFFSET;
595 else
596 csid->base = camss->vfe[id].base + VFE_480_CSID_OFFSET;
597 } else {
598 csid->base = devm_platform_ioremap_resource_byname(pdev, res->reg[0]);
599 if (IS_ERR(csid->base))
600 return PTR_ERR(csid->base);
601 }
602
603 /* Interrupt */
604
605 ret = platform_get_irq_byname(pdev, res->interrupt[0]);
606 if (ret < 0)
607 return ret;
608
609 csid->irq = ret;
610 snprintf(csid->irq_name, sizeof(csid->irq_name), "%s_%s%d",
611 dev_name(dev), MSM_CSID_NAME, csid->id);
612 ret = devm_request_irq(dev, csid->irq, csid->ops->isr,
613 IRQF_TRIGGER_RISING | IRQF_NO_AUTOEN,
614 csid->irq_name, csid);
615 if (ret < 0) {
616 dev_err(dev, "request_irq failed: %d\n", ret);
617 return ret;
618 }
619
620 /* Clocks */
621
622 csid->nclocks = 0;
623 while (res->clock[csid->nclocks])
624 csid->nclocks++;
625
626 csid->clock = devm_kcalloc(dev, csid->nclocks, sizeof(*csid->clock),
627 GFP_KERNEL);
628 if (!csid->clock)
629 return -ENOMEM;
630
631 for (i = 0; i < csid->nclocks; i++) {
632 struct camss_clock *clock = &csid->clock[i];
633
634 clock->clk = devm_clk_get(dev, res->clock[i]);
635 if (IS_ERR(clock->clk))
636 return PTR_ERR(clock->clk);
637
638 clock->name = res->clock[i];
639
640 clock->nfreqs = 0;
641 while (res->clock_rate[i][clock->nfreqs])
642 clock->nfreqs++;
643
644 if (!clock->nfreqs) {
645 clock->freq = NULL;
646 continue;
647 }
648
649 clock->freq = devm_kcalloc(dev,
650 clock->nfreqs,
651 sizeof(*clock->freq),
652 GFP_KERNEL);
653 if (!clock->freq)
654 return -ENOMEM;
655
656 for (j = 0; j < clock->nfreqs; j++)
657 clock->freq[j] = res->clock_rate[i][j];
658 }
659
660 /* Regulator */
661 for (i = 0; i < ARRAY_SIZE(res->regulators); i++) {
662 if (res->regulators[i])
663 csid->num_supplies++;
664 }
665
666 if (csid->num_supplies) {
667 csid->supplies = devm_kmalloc_array(camss->dev,
668 csid->num_supplies,
669 sizeof(*csid->supplies),
670 GFP_KERNEL);
671 if (!csid->supplies)
672 return -ENOMEM;
673 }
674
675 for (i = 0; i < csid->num_supplies; i++)
676 csid->supplies[i].supply = res->regulators[i];
677
678 ret = devm_regulator_bulk_get(camss->dev, csid->num_supplies,
679 csid->supplies);
680 if (ret)
681 return ret;
682
683 init_completion(&csid->reset_complete);
684
685 return 0;
686 }
687
688 /*
689 * msm_csid_get_csid_id - Get CSID HW module id
690 * @entity: Pointer to CSID media entity structure
691 * @id: Return CSID HW module id here
692 */
msm_csid_get_csid_id(struct media_entity * entity,u8 * id)693 void msm_csid_get_csid_id(struct media_entity *entity, u8 *id)
694 {
695 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
696 struct csid_device *csid = v4l2_get_subdevdata(sd);
697
698 *id = csid->id;
699 }
700
701 /*
702 * csid_get_lane_assign - Calculate CSI2 lane assign configuration parameter
703 * @lane_cfg - CSI2 lane configuration
704 *
705 * Return lane assign
706 */
csid_get_lane_assign(struct csiphy_lanes_cfg * lane_cfg)707 static u32 csid_get_lane_assign(struct csiphy_lanes_cfg *lane_cfg)
708 {
709 u32 lane_assign = 0;
710 int i;
711
712 for (i = 0; i < lane_cfg->num_data; i++)
713 lane_assign |= lane_cfg->data[i].pos << (i * 4);
714
715 return lane_assign;
716 }
717
718 /*
719 * csid_link_setup - Setup CSID connections
720 * @entity: Pointer to media entity structure
721 * @local: Pointer to local pad
722 * @remote: Pointer to remote pad
723 * @flags: Link flags
724 *
725 * Return 0 on success
726 */
csid_link_setup(struct media_entity * entity,const struct media_pad * local,const struct media_pad * remote,u32 flags)727 static int csid_link_setup(struct media_entity *entity,
728 const struct media_pad *local,
729 const struct media_pad *remote, u32 flags)
730 {
731 if (flags & MEDIA_LNK_FL_ENABLED)
732 if (media_pad_remote_pad_first(local))
733 return -EBUSY;
734
735 if ((local->flags & MEDIA_PAD_FL_SINK) &&
736 (flags & MEDIA_LNK_FL_ENABLED)) {
737 struct v4l2_subdev *sd;
738 struct csid_device *csid;
739 struct csiphy_device *csiphy;
740 struct csiphy_lanes_cfg *lane_cfg;
741 struct v4l2_subdev_format format = { 0 };
742
743 sd = media_entity_to_v4l2_subdev(entity);
744 csid = v4l2_get_subdevdata(sd);
745
746 /* If test generator is enabled */
747 /* do not allow a link from CSIPHY to CSID */
748 if (csid->testgen_mode->cur.val != 0)
749 return -EBUSY;
750
751 sd = media_entity_to_v4l2_subdev(remote->entity);
752 csiphy = v4l2_get_subdevdata(sd);
753
754 /* If a sensor is not linked to CSIPHY */
755 /* do no allow a link from CSIPHY to CSID */
756 if (!csiphy->cfg.csi2)
757 return -EPERM;
758
759 csid->phy.csiphy_id = csiphy->id;
760
761 lane_cfg = &csiphy->cfg.csi2->lane_cfg;
762 csid->phy.lane_cnt = lane_cfg->num_data;
763 csid->phy.lane_assign = csid_get_lane_assign(lane_cfg);
764
765 /* Reset format on source pad to sink pad format */
766 format.pad = MSM_CSID_PAD_SRC;
767 format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
768 csid_set_format(&csid->subdev, NULL, &format);
769 }
770
771 return 0;
772 }
773
774 static const struct v4l2_subdev_core_ops csid_core_ops = {
775 .s_power = csid_set_power,
776 .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
777 .unsubscribe_event = v4l2_event_subdev_unsubscribe,
778 };
779
780 static const struct v4l2_subdev_video_ops csid_video_ops = {
781 .s_stream = csid_set_stream,
782 };
783
784 static const struct v4l2_subdev_pad_ops csid_pad_ops = {
785 .enum_mbus_code = csid_enum_mbus_code,
786 .enum_frame_size = csid_enum_frame_size,
787 .get_fmt = csid_get_format,
788 .set_fmt = csid_set_format,
789 };
790
791 static const struct v4l2_subdev_ops csid_v4l2_ops = {
792 .core = &csid_core_ops,
793 .video = &csid_video_ops,
794 .pad = &csid_pad_ops,
795 };
796
797 static const struct v4l2_subdev_internal_ops csid_v4l2_internal_ops = {
798 .open = csid_init_formats,
799 };
800
801 static const struct media_entity_operations csid_media_ops = {
802 .link_setup = csid_link_setup,
803 .link_validate = v4l2_subdev_link_validate,
804 };
805
806 /*
807 * msm_csid_register_entity - Register subdev node for CSID module
808 * @csid: CSID device
809 * @v4l2_dev: V4L2 device
810 *
811 * Return 0 on success or a negative error code otherwise
812 */
msm_csid_register_entity(struct csid_device * csid,struct v4l2_device * v4l2_dev)813 int msm_csid_register_entity(struct csid_device *csid,
814 struct v4l2_device *v4l2_dev)
815 {
816 struct v4l2_subdev *sd = &csid->subdev;
817 struct media_pad *pads = csid->pads;
818 struct device *dev = csid->camss->dev;
819 int ret;
820
821 v4l2_subdev_init(sd, &csid_v4l2_ops);
822 sd->internal_ops = &csid_v4l2_internal_ops;
823 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
824 V4L2_SUBDEV_FL_HAS_EVENTS;
825 snprintf(sd->name, ARRAY_SIZE(sd->name), "%s%d",
826 MSM_CSID_NAME, csid->id);
827 v4l2_set_subdevdata(sd, csid);
828
829 ret = v4l2_ctrl_handler_init(&csid->ctrls, 1);
830 if (ret < 0) {
831 dev_err(dev, "Failed to init ctrl handler: %d\n", ret);
832 return ret;
833 }
834
835 csid->testgen_mode = v4l2_ctrl_new_std_menu_items(&csid->ctrls,
836 &csid_ctrl_ops, V4L2_CID_TEST_PATTERN,
837 csid->testgen.nmodes, 0, 0,
838 csid->testgen.modes);
839
840 if (csid->ctrls.error) {
841 dev_err(dev, "Failed to init ctrl: %d\n", csid->ctrls.error);
842 ret = csid->ctrls.error;
843 goto free_ctrl;
844 }
845
846 csid->subdev.ctrl_handler = &csid->ctrls;
847
848 ret = csid_init_formats(sd, NULL);
849 if (ret < 0) {
850 dev_err(dev, "Failed to init format: %d\n", ret);
851 goto free_ctrl;
852 }
853
854 pads[MSM_CSID_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
855 pads[MSM_CSID_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE;
856
857 sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
858 sd->entity.ops = &csid_media_ops;
859 ret = media_entity_pads_init(&sd->entity, MSM_CSID_PADS_NUM, pads);
860 if (ret < 0) {
861 dev_err(dev, "Failed to init media entity: %d\n", ret);
862 goto free_ctrl;
863 }
864
865 ret = v4l2_device_register_subdev(v4l2_dev, sd);
866 if (ret < 0) {
867 dev_err(dev, "Failed to register subdev: %d\n", ret);
868 goto media_cleanup;
869 }
870
871 return 0;
872
873 media_cleanup:
874 media_entity_cleanup(&sd->entity);
875 free_ctrl:
876 v4l2_ctrl_handler_free(&csid->ctrls);
877
878 return ret;
879 }
880
881 /*
882 * msm_csid_unregister_entity - Unregister CSID module subdev node
883 * @csid: CSID device
884 */
msm_csid_unregister_entity(struct csid_device * csid)885 void msm_csid_unregister_entity(struct csid_device *csid)
886 {
887 v4l2_device_unregister_subdev(&csid->subdev);
888 media_entity_cleanup(&csid->subdev.entity);
889 v4l2_ctrl_handler_free(&csid->ctrls);
890 }
891
