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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / media / platform / exynos4-is / media-dev.c
blob9aaf3b8060d503c23405180e4bc7341d19da82ca
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * S5P/EXYNOS4 SoC series camera host interface media device driver
4 *
5 * Copyright (C) 2011 - 2013 Samsung Electronics Co., Ltd.
6 * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
7 */
8
9 #include <linux/bug.h>
10 #include <linux/clk.h>
11 #include <linux/clk-provider.h>
12 #include <linux/device.h>
13 #include <linux/errno.h>
14 #include <linux/i2c.h>
15 #include <linux/kernel.h>
16 #include <linux/list.h>
17 #include <linux/module.h>
18 #include <linux/of.h>
19 #include <linux/of_platform.h>
20 #include <linux/of_device.h>
21 #include <linux/of_graph.h>
22 #include <linux/platform_device.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/types.h>
25 #include <linux/slab.h>
26 #include <media/v4l2-async.h>
27 #include <media/v4l2-ctrls.h>
28 #include <media/v4l2-fwnode.h>
29 #include <media/media-device.h>
30 #include <media/drv-intf/exynos-fimc.h>
31
32 #include "media-dev.h"
33 #include "fimc-core.h"
34 #include "fimc-is.h"
35 #include "fimc-lite.h"
36 #include "mipi-csis.h"
37
38 /* Set up image sensor subdev -> FIMC capture node notifications. */
39 static void __setup_sensor_notification(struct fimc_md *fmd,
40 struct v4l2_subdev *sensor,
41 struct v4l2_subdev *fimc_sd)
42 {
43 struct fimc_source_info *src_inf;
44 struct fimc_sensor_info *md_si;
45 unsigned long flags;
46
47 src_inf = v4l2_get_subdev_hostdata(sensor);
48 if (!src_inf || WARN_ON(fmd == NULL))
49 return;
50
51 md_si = source_to_sensor_info(src_inf);
52 spin_lock_irqsave(&fmd->slock, flags);
53 md_si->host = v4l2_get_subdevdata(fimc_sd);
54 spin_unlock_irqrestore(&fmd->slock, flags);
55 }
56
57 /**
58 * fimc_pipeline_prepare - update pipeline information with subdevice pointers
59 * @p: fimc pipeline
60 * @me: media entity terminating the pipeline
61 *
62 * Caller holds the graph mutex.
63 */
64 static void fimc_pipeline_prepare(struct fimc_pipeline *p,
65 struct media_entity *me)
66 {
67 struct fimc_md *fmd = entity_to_fimc_mdev(me);
68 struct v4l2_subdev *sd;
69 struct v4l2_subdev *sensor = NULL;
70 int i;
71
72 for (i = 0; i < IDX_MAX; i++)
73 p->subdevs[i] = NULL;
74
75 while (1) {
76 struct media_pad *pad = NULL;
77
78 /* Find remote source pad */
79 for (i = 0; i < me->num_pads; i++) {
80 struct media_pad *spad = &me->pads[i];
81 if (!(spad->flags & MEDIA_PAD_FL_SINK))
82 continue;
83 pad = media_entity_remote_pad(spad);
84 if (pad)
85 break;
86 }
87
88 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
89 break;
90 sd = media_entity_to_v4l2_subdev(pad->entity);
91
92 switch (sd->grp_id) {
93 case GRP_ID_SENSOR:
94 sensor = sd;
95 /* fall through */
96 case GRP_ID_FIMC_IS_SENSOR:
97 p->subdevs[IDX_SENSOR] = sd;
98 break;
99 case GRP_ID_CSIS:
100 p->subdevs[IDX_CSIS] = sd;
101 break;
102 case GRP_ID_FLITE:
103 p->subdevs[IDX_FLITE] = sd;
104 break;
105 case GRP_ID_FIMC:
106 p->subdevs[IDX_FIMC] = sd;
107 break;
108 case GRP_ID_FIMC_IS:
109 p->subdevs[IDX_IS_ISP] = sd;
110 break;
111 default:
112 break;
113 }
114 me = &sd->entity;
115 if (me->num_pads == 1)
116 break;
117 }
118
119 if (sensor && p->subdevs[IDX_FIMC])
120 __setup_sensor_notification(fmd, sensor, p->subdevs[IDX_FIMC]);
121 }
122
123 /**
124 * __subdev_set_power - change power state of a single subdev
125 * @sd: subdevice to change power state for
126 * @on: 1 to enable power or 0 to disable
127 *
128 * Return result of s_power subdev operation or -ENXIO if sd argument
129 * is NULL. Return 0 if the subdevice does not implement s_power.
130 */
131 static int __subdev_set_power(struct v4l2_subdev *sd, int on)
132 {
133 int *use_count;
134 int ret;
135
136 if (sd == NULL)
137 return -ENXIO;
138
139 use_count = &sd->entity.use_count;
140 if (on && (*use_count)++ > 0)
141 return 0;
142 else if (!on && (*use_count == 0 || --(*use_count) > 0))
143 return 0;
144 ret = v4l2_subdev_call(sd, core, s_power, on);
145
146 return ret != -ENOIOCTLCMD ? ret : 0;
147 }
148
149 /**
150 * fimc_pipeline_s_power - change power state of all pipeline subdevs
151 * @p: fimc device terminating the pipeline
152 * @on: true to power on, false to power off
153 *
154 * Needs to be called with the graph mutex held.
155 */
156 static int fimc_pipeline_s_power(struct fimc_pipeline *p, bool on)
157 {
158 static const u8 seq[2][IDX_MAX - 1] = {
159 { IDX_IS_ISP, IDX_SENSOR, IDX_CSIS, IDX_FLITE },
160 { IDX_CSIS, IDX_FLITE, IDX_SENSOR, IDX_IS_ISP },
161 };
162 int i, ret = 0;
163
164 if (p->subdevs[IDX_SENSOR] == NULL)
165 return -ENXIO;
166
167 for (i = 0; i < IDX_MAX - 1; i++) {
168 unsigned int idx = seq[on][i];
169
170 ret = __subdev_set_power(p->subdevs[idx], on);
171
172
173 if (ret < 0 && ret != -ENXIO)
174 goto error;
175 }
176 return 0;
177 error:
178 for (; i >= 0; i--) {
179 unsigned int idx = seq[on][i];
180 __subdev_set_power(p->subdevs[idx], !on);
181 }
182 return ret;
183 }
184
185 /**
186 * __fimc_pipeline_enable - enable power of all pipeline subdevs
187 * and the sensor clock
188 * @ep: video pipeline structure
189 * @fmd: fimc media device
190 *
191 * Called with the graph mutex held.
192 */
193 static int __fimc_pipeline_enable(struct exynos_media_pipeline *ep,
194 struct fimc_md *fmd)
195 {
196 struct fimc_pipeline *p = to_fimc_pipeline(ep);
197 int ret;
198
199 /* Enable PXLASYNC clock if this pipeline includes FIMC-IS */
200 if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP]) {
201 ret = clk_prepare_enable(fmd->wbclk[CLK_IDX_WB_B]);
202 if (ret < 0)
203 return ret;
204 }
205
206 ret = fimc_pipeline_s_power(p, 1);
207 if (!ret)
208 return 0;
209
210 if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP])
211 clk_disable_unprepare(fmd->wbclk[CLK_IDX_WB_B]);
212
213 return ret;
214 }
215
216 /**
217 * __fimc_pipeline_open - update the pipeline information, enable power
218 * of all pipeline subdevs and the sensor clock
219 * @ep: fimc device terminating the pipeline
220 * @me: media entity to start graph walk with
221 * @prepare: true to walk the current pipeline and acquire all subdevs
222 *
223 * Called with the graph mutex held.
224 */
225 static int __fimc_pipeline_open(struct exynos_media_pipeline *ep,
226 struct media_entity *me, bool prepare)
227 {
228 struct fimc_md *fmd = entity_to_fimc_mdev(me);
229 struct fimc_pipeline *p = to_fimc_pipeline(ep);
230 struct v4l2_subdev *sd;
231
232 if (WARN_ON(p == NULL || me == NULL))
233 return -EINVAL;
234
235 if (prepare)
236 fimc_pipeline_prepare(p, me);
237
238 sd = p->subdevs[IDX_SENSOR];
239 if (sd == NULL) {
240 pr_warn("%s(): No sensor subdev\n", __func__);
241 /*
242 * Pipeline open cannot fail so as to make it possible
243 * for the user space to configure the pipeline.
244 */
245 return 0;
246 }
247
248 return __fimc_pipeline_enable(ep, fmd);
249 }
250
251 /**
252 * __fimc_pipeline_close - disable the sensor clock and pipeline power
253 * @ep: fimc device terminating the pipeline
254 *
255 * Disable power of all subdevs and turn the external sensor clock off.
256 */
257 static int __fimc_pipeline_close(struct exynos_media_pipeline *ep)
258 {
259 struct fimc_pipeline *p = to_fimc_pipeline(ep);
260 struct v4l2_subdev *sd = p ? p->subdevs[IDX_SENSOR] : NULL;
261 struct fimc_md *fmd;
262 int ret;
263
264 if (sd == NULL) {
265 pr_warn("%s(): No sensor subdev\n", __func__);
266 return 0;
267 }
268
269 ret = fimc_pipeline_s_power(p, 0);
270
271 fmd = entity_to_fimc_mdev(&sd->entity);
272
273 /* Disable PXLASYNC clock if this pipeline includes FIMC-IS */
274 if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP])
275 clk_disable_unprepare(fmd->wbclk[CLK_IDX_WB_B]);
276
277 return ret == -ENXIO ? 0 : ret;
278 }
279
280 /**
281 * __fimc_pipeline_s_stream - call s_stream() on pipeline subdevs
282 * @ep: video pipeline structure
283 * @on: passed as the s_stream() callback argument
284 */
285 static int __fimc_pipeline_s_stream(struct exynos_media_pipeline *ep, bool on)
286 {
287 static const u8 seq[2][IDX_MAX] = {
288 { IDX_FIMC, IDX_SENSOR, IDX_IS_ISP, IDX_CSIS, IDX_FLITE },
289 { IDX_CSIS, IDX_FLITE, IDX_FIMC, IDX_SENSOR, IDX_IS_ISP },
290 };
291 struct fimc_pipeline *p = to_fimc_pipeline(ep);
292 struct fimc_md *fmd = entity_to_fimc_mdev(&p->subdevs[IDX_CSIS]->entity);
293 enum fimc_subdev_index sd_id;
294 int i, ret = 0;
295
296 if (p->subdevs[IDX_SENSOR] == NULL) {
297 if (!fmd->user_subdev_api) {
298 /*
299 * Sensor must be already discovered if we
300 * aren't in the user_subdev_api mode
301 */
302 return -ENODEV;
303 }
304
305 /* Get pipeline sink entity */
306 if (p->subdevs[IDX_FIMC])
307 sd_id = IDX_FIMC;
308 else if (p->subdevs[IDX_IS_ISP])
309 sd_id = IDX_IS_ISP;
310 else if (p->subdevs[IDX_FLITE])
311 sd_id = IDX_FLITE;
312 else
313 return -ENODEV;
314
315 /*
316 * Sensor could have been linked between open and STREAMON -
317 * check if this is the case.
318 */
319 fimc_pipeline_prepare(p, &p->subdevs[sd_id]->entity);
320
321 if (p->subdevs[IDX_SENSOR] == NULL)
322 return -ENODEV;
323
324 ret = __fimc_pipeline_enable(ep, fmd);
325 if (ret < 0)
326 return ret;
327
328 }
329
330 for (i = 0; i < IDX_MAX; i++) {
331 unsigned int idx = seq[on][i];
332
333 ret = v4l2_subdev_call(p->subdevs[idx], video, s_stream, on);
334
335 if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
336 goto error;
337 }
338
339 return 0;
340 error:
341 fimc_pipeline_s_power(p, !on);
342 for (; i >= 0; i--) {
343 unsigned int idx = seq[on][i];
344 v4l2_subdev_call(p->subdevs[idx], video, s_stream, !on);
345 }
346 return ret;
347 }
348
349 /* Media pipeline operations for the FIMC/FIMC-LITE video device driver */
350 static const struct exynos_media_pipeline_ops fimc_pipeline_ops = {
351 .open = __fimc_pipeline_open,
352 .close = __fimc_pipeline_close,
353 .set_stream = __fimc_pipeline_s_stream,
354 };
355
356 static struct exynos_media_pipeline *fimc_md_pipeline_create(
357 struct fimc_md *fmd)
358 {
359 struct fimc_pipeline *p;
360
361 p = kzalloc(sizeof(*p), GFP_KERNEL);
362 if (!p)
363 return NULL;
364
365 list_add_tail(&p->list, &fmd->pipelines);
366
367 p->ep.ops = &fimc_pipeline_ops;
368 return &p->ep;
369 }
370
371 static void fimc_md_pipelines_free(struct fimc_md *fmd)
372 {
373 while (!list_empty(&fmd->pipelines)) {
374 struct fimc_pipeline *p;
375
376 p = list_entry(fmd->pipelines.next, typeof(*p), list);
377 list_del(&p->list);
378 kfree(p);
379 }
380 }
381
382 /* Parse port node and register as a sub-device any sensor specified there. */
383 static int fimc_md_parse_port_node(struct fimc_md *fmd,
384 struct device_node *port,
385 unsigned int index)
386 {
387 struct fimc_source_info *pd = &fmd->sensor[index].pdata;
388 struct device_node *rem, *ep, *np;
389 struct v4l2_fwnode_endpoint endpoint = { .bus_type = 0 };
390 int ret;
391
392 /* Assume here a port node can have only one endpoint node. */
393 ep = of_get_next_child(port, NULL);
394 if (!ep)
395 return 0;
396
397 ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep), &endpoint);
398 if (ret) {
399 of_node_put(ep);
400 return ret;
401 }
402
403 if (WARN_ON(endpoint.base.port == 0) || index >= FIMC_MAX_SENSORS) {
404 of_node_put(ep);
405 return -EINVAL;
406 }
407
408 pd->mux_id = (endpoint.base.port - 1) & 0x1;
409
410 rem = of_graph_get_remote_port_parent(ep);
411 of_node_put(ep);
412 if (rem == NULL) {
413 v4l2_info(&fmd->v4l2_dev, "Remote device at %pOF not found\n",
414 ep);
415 return 0;
416 }
417
418 if (fimc_input_is_parallel(endpoint.base.port)) {
419 if (endpoint.bus_type == V4L2_MBUS_PARALLEL)
420 pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_601;
421 else
422 pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_656;
423 pd->flags = endpoint.bus.parallel.flags;
424 } else if (fimc_input_is_mipi_csi(endpoint.base.port)) {
425 /*
426 * MIPI CSI-2: only input mux selection and
427 * the sensor's clock frequency is needed.
428 */
429 pd->sensor_bus_type = FIMC_BUS_TYPE_MIPI_CSI2;
430 } else {
431 v4l2_err(&fmd->v4l2_dev, "Wrong port id (%u) at node %pOF\n",
432 endpoint.base.port, rem);
433 }
434 /*
435 * For FIMC-IS handled sensors, that are placed under i2c-isp device
436 * node, FIMC is connected to the FIMC-IS through its ISP Writeback
437 * input. Sensors are attached to the FIMC-LITE hostdata interface
438 * directly or through MIPI-CSIS, depending on the external media bus
439 * used. This needs to be handled in a more reliable way, not by just
440 * checking parent's node name.
441 */
442 np = of_get_parent(rem);
443
444 if (of_node_name_eq(np, "i2c-isp"))
445 pd->fimc_bus_type = FIMC_BUS_TYPE_ISP_WRITEBACK;
446 else
447 pd->fimc_bus_type = pd->sensor_bus_type;
448 of_node_put(np);
449
450 if (WARN_ON(index >= ARRAY_SIZE(fmd->sensor))) {
451 of_node_put(rem);
452 return -EINVAL;
453 }
454
455 fmd->sensor[index].asd.match_type = V4L2_ASYNC_MATCH_FWNODE;
456 fmd->sensor[index].asd.match.fwnode = of_fwnode_handle(rem);
457
458 ret = v4l2_async_notifier_add_subdev(&fmd->subdev_notifier,
459 &fmd->sensor[index].asd);
460 if (ret) {
461 of_node_put(rem);
462 return ret;
463 }
464
465 fmd->num_sensors++;
466
467 return 0;
468 }
469
470 /* Register all SoC external sub-devices */
471 static int fimc_md_register_sensor_entities(struct fimc_md *fmd)
472 {
473 struct device_node *parent = fmd->pdev->dev.of_node;
474 struct device_node *ports = NULL;
475 struct device_node *node;
476 int index = 0;
477 int ret;
478
479 /*
480 * Runtime resume one of the FIMC entities to make sure
481 * the sclk_cam clocks are not globally disabled.
482 */
483 if (!fmd->pmf)
484 return -ENXIO;
485
486 ret = pm_runtime_get_sync(fmd->pmf);
487 if (ret < 0)
488 return ret;
489
490 fmd->num_sensors = 0;
491
492 /* Attach sensors linked to MIPI CSI-2 receivers */
493 for_each_available_child_of_node(parent, node) {
494 struct device_node *port;
495
496 if (!of_node_name_eq(node, "csis"))
497 continue;
498 /* The csis node can have only port subnode. */
499 port = of_get_next_child(node, NULL);
500 if (!port)
501 continue;
502
503 ret = fimc_md_parse_port_node(fmd, port, index);
504 of_node_put(port);
505 if (ret < 0) {
506 of_node_put(node);
507 goto cleanup;
508 }
509 index++;
510 }
511
512 /* Attach sensors listed in the parallel-ports node */
513 ports = of_get_child_by_name(parent, "parallel-ports");
514 if (!ports)
515 goto rpm_put;
516
517 for_each_child_of_node(ports, node) {
518 ret = fimc_md_parse_port_node(fmd, node, index);
519 if (ret < 0) {
520 of_node_put(node);
521 goto cleanup;
522 }
523 index++;
524 }
525 of_node_put(ports);
526
527 rpm_put:
528 pm_runtime_put(fmd->pmf);
529 return 0;
530
531 cleanup:
532 of_node_put(ports);
533 v4l2_async_notifier_cleanup(&fmd->subdev_notifier);
534 pm_runtime_put(fmd->pmf);
535 return ret;
536 }
537
538 static int __of_get_csis_id(struct device_node *np)
539 {
540 u32 reg = 0;
541
542 np = of_get_child_by_name(np, "port");
543 if (!np)
544 return -EINVAL;
545 of_property_read_u32(np, "reg", &reg);
546 of_node_put(np);
547 return reg - FIMC_INPUT_MIPI_CSI2_0;
548 }
549
550 /*
551 * MIPI-CSIS, FIMC and FIMC-LITE platform devices registration.
552 */
553 static int register_fimc_lite_entity(struct fimc_md *fmd,
554 struct fimc_lite *fimc_lite)
555 {
556 struct v4l2_subdev *sd;
557 struct exynos_media_pipeline *ep;
558 int ret;
559
560 if (WARN_ON(fimc_lite->index >= FIMC_LITE_MAX_DEVS ||
561 fmd->fimc_lite[fimc_lite->index]))
562 return -EBUSY;
563
564 sd = &fimc_lite->subdev;
565 sd->grp_id = GRP_ID_FLITE;
566
567 ep = fimc_md_pipeline_create(fmd);
568 if (!ep)
569 return -ENOMEM;
570
571 v4l2_set_subdev_hostdata(sd, ep);
572
573 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
574 if (!ret)
575 fmd->fimc_lite[fimc_lite->index] = fimc_lite;
576 else
577 v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.LITE%d\n",
578 fimc_lite->index);
579 return ret;
580 }
581
582 static int register_fimc_entity(struct fimc_md *fmd, struct fimc_dev *fimc)
583 {
584 struct v4l2_subdev *sd;
585 struct exynos_media_pipeline *ep;
586 int ret;
587
588 if (WARN_ON(fimc->id >= FIMC_MAX_DEVS || fmd->fimc[fimc->id]))
589 return -EBUSY;
590
591 sd = &fimc->vid_cap.subdev;
592 sd->grp_id = GRP_ID_FIMC;
593
594 ep = fimc_md_pipeline_create(fmd);
595 if (!ep)
596 return -ENOMEM;
597
598 v4l2_set_subdev_hostdata(sd, ep);
599
600 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
601 if (!ret) {
602 if (!fmd->pmf && fimc->pdev)
603 fmd->pmf = &fimc->pdev->dev;
604 fmd->fimc[fimc->id] = fimc;
605 fimc->vid_cap.user_subdev_api = fmd->user_subdev_api;
606 } else {
607 v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.%d (%d)\n",
608 fimc->id, ret);
609 }
610 return ret;
611 }
612
613 static int register_csis_entity(struct fimc_md *fmd,
614 struct platform_device *pdev,
615 struct v4l2_subdev *sd)
616 {
617 struct device_node *node = pdev->dev.of_node;
618 int id, ret;
619
620 id = node ? __of_get_csis_id(node) : max(0, pdev->id);
621
622 if (WARN_ON(id < 0 || id >= CSIS_MAX_ENTITIES))
623 return -ENOENT;
624
625 if (WARN_ON(fmd->csis[id].sd))
626 return -EBUSY;
627
628 sd->grp_id = GRP_ID_CSIS;
629 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
630 if (!ret)
631 fmd->csis[id].sd = sd;
632 else
633 v4l2_err(&fmd->v4l2_dev,
634 "Failed to register MIPI-CSIS.%d (%d)\n", id, ret);
635 return ret;
636 }
637
638 static int register_fimc_is_entity(struct fimc_md *fmd, struct fimc_is *is)
639 {
640 struct v4l2_subdev *sd = &is->isp.subdev;
641 struct exynos_media_pipeline *ep;
642 int ret;
643
644 /* Allocate pipeline object for the ISP capture video node. */
645 ep = fimc_md_pipeline_create(fmd);
646 if (!ep)
647 return -ENOMEM;
648
649 v4l2_set_subdev_hostdata(sd, ep);
650
651 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
652 if (ret) {
653 v4l2_err(&fmd->v4l2_dev,
654 "Failed to register FIMC-ISP (%d)\n", ret);
655 return ret;
656 }
657
658 fmd->fimc_is = is;
659 return 0;
660 }
661
662 static int fimc_md_register_platform_entity(struct fimc_md *fmd,
663 struct platform_device *pdev,
664 int plat_entity)
665 {
666 struct device *dev = &pdev->dev;
667 int ret = -EPROBE_DEFER;
668 void *drvdata;
669
670 /* Lock to ensure dev->driver won't change. */
671 device_lock(dev);
672
673 if (!dev->driver || !try_module_get(dev->driver->owner))
674 goto dev_unlock;
675
676 drvdata = dev_get_drvdata(dev);
677 /* Some subdev didn't probe successfully id drvdata is NULL */
678 if (drvdata) {
679 switch (plat_entity) {
680 case IDX_FIMC:
681 ret = register_fimc_entity(fmd, drvdata);
682 break;
683 case IDX_FLITE:
684 ret = register_fimc_lite_entity(fmd, drvdata);
685 break;
686 case IDX_CSIS:
687 ret = register_csis_entity(fmd, pdev, drvdata);
688 break;
689 case IDX_IS_ISP:
690 ret = register_fimc_is_entity(fmd, drvdata);
691 break;
692 default:
693 ret = -ENODEV;
694 }
695 }
696
697 module_put(dev->driver->owner);
698 dev_unlock:
699 device_unlock(dev);
700 if (ret == -EPROBE_DEFER)
701 dev_info(&fmd->pdev->dev, "deferring %s device registration\n",
702 dev_name(dev));
703 else if (ret < 0)
704 dev_err(&fmd->pdev->dev, "%s device registration failed (%d)\n",
705 dev_name(dev), ret);
706 return ret;
707 }
708
709 /* Register FIMC, FIMC-LITE and CSIS media entities */
710 static int fimc_md_register_platform_entities(struct fimc_md *fmd,
711 struct device_node *parent)
712 {
713 struct device_node *node;
714 int ret = 0;
715
716 for_each_available_child_of_node(parent, node) {
717 struct platform_device *pdev;
718 int plat_entity = -1;
719
720 pdev = of_find_device_by_node(node);
721 if (!pdev)
722 continue;
723
724 /* If driver of any entity isn't ready try all again later. */
725 if (of_node_name_eq(node, CSIS_OF_NODE_NAME))
726 plat_entity = IDX_CSIS;
727 else if (of_node_name_eq(node, FIMC_IS_OF_NODE_NAME))
728 plat_entity = IDX_IS_ISP;
729 else if (of_node_name_eq(node, FIMC_LITE_OF_NODE_NAME))
730 plat_entity = IDX_FLITE;
731 else if (of_node_name_eq(node, FIMC_OF_NODE_NAME) &&
732 !of_property_read_bool(node, "samsung,lcd-wb"))
733 plat_entity = IDX_FIMC;
734
735 if (plat_entity >= 0)
736 ret = fimc_md_register_platform_entity(fmd, pdev,
737 plat_entity);
738 put_device(&pdev->dev);
739 if (ret < 0) {
740 of_node_put(node);
741 break;
742 }
743 }
744
745 return ret;
746 }
747
748 static void fimc_md_unregister_entities(struct fimc_md *fmd)
749 {
750 int i;
751
752 for (i = 0; i < FIMC_MAX_DEVS; i++) {
753 struct fimc_dev *dev = fmd->fimc[i];
754 if (dev == NULL)
755 continue;
756 v4l2_device_unregister_subdev(&dev->vid_cap.subdev);
757 dev->vid_cap.ve.pipe = NULL;
758 fmd->fimc[i] = NULL;
759 }
760 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
761 struct fimc_lite *dev = fmd->fimc_lite[i];
762 if (dev == NULL)
763 continue;
764 v4l2_device_unregister_subdev(&dev->subdev);
765 dev->ve.pipe = NULL;
766 fmd->fimc_lite[i] = NULL;
767 }
768 for (i = 0; i < CSIS_MAX_ENTITIES; i++) {
769 if (fmd->csis[i].sd == NULL)
770 continue;
771 v4l2_device_unregister_subdev(fmd->csis[i].sd);
772 fmd->csis[i].sd = NULL;
773 }
774
775 if (fmd->fimc_is)
776 v4l2_device_unregister_subdev(&fmd->fimc_is->isp.subdev);
777
778 v4l2_info(&fmd->v4l2_dev, "Unregistered all entities\n");
779 }
780
781 /**
782 * __fimc_md_create_fimc_links - create links to all FIMC entities
783 * @fmd: fimc media device
784 * @source: the source entity to create links to all fimc entities from
785 * @sensor: sensor subdev linked to FIMC[fimc_id] entity, may be null
786 * @pad: the source entity pad index
787 * @link_mask: bitmask of the fimc devices for which link should be enabled
788 */
789 static int __fimc_md_create_fimc_sink_links(struct fimc_md *fmd,
790 struct media_entity *source,
791 struct v4l2_subdev *sensor,
792 int pad, int link_mask)
793 {
794 struct fimc_source_info *si = NULL;
795 struct media_entity *sink;
796 unsigned int flags = 0;
797 int i, ret = 0;
798
799 if (sensor) {
800 si = v4l2_get_subdev_hostdata(sensor);
801 /* Skip direct FIMC links in the logical FIMC-IS sensor path */
802 if (si && si->fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK)
803 ret = 1;
804 }
805
806 for (i = 0; !ret && i < FIMC_MAX_DEVS; i++) {
807 if (!fmd->fimc[i])
808 continue;
809 /*
810 * Some FIMC variants are not fitted with camera capture
811 * interface. Skip creating a link from sensor for those.
812 */
813 if (!fmd->fimc[i]->variant->has_cam_if)
814 continue;
815
816 flags = ((1 << i) & link_mask) ? MEDIA_LNK_FL_ENABLED : 0;
817
818 sink = &fmd->fimc[i]->vid_cap.subdev.entity;
819 ret = media_create_pad_link(source, pad, sink,
820 FIMC_SD_PAD_SINK_CAM, flags);
821 if (ret)
822 return ret;
823
824 /* Notify FIMC capture subdev entity */
825 ret = media_entity_call(sink, link_setup, &sink->pads[0],
826 &source->pads[pad], flags);
827 if (ret)
828 break;
829
830 v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]\n",
831 source->name, flags ? '=' : '-', sink->name);
832 }
833
834 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
835 if (!fmd->fimc_lite[i])
836 continue;
837
838 sink = &fmd->fimc_lite[i]->subdev.entity;
839 ret = media_create_pad_link(source, pad, sink,
840 FLITE_SD_PAD_SINK, 0);
841 if (ret)
842 return ret;
843
844 /* Notify FIMC-LITE subdev entity */
845 ret = media_entity_call(sink, link_setup, &sink->pads[0],
846 &source->pads[pad], 0);
847 if (ret)
848 break;
849
850 v4l2_info(&fmd->v4l2_dev, "created link [%s] -> [%s]\n",
851 source->name, sink->name);
852 }
853 return 0;
854 }
855
856 /* Create links from FIMC-LITE source pads to other entities */
857 static int __fimc_md_create_flite_source_links(struct fimc_md *fmd)
858 {
859 struct media_entity *source, *sink;
860 int i, ret = 0;
861
862 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
863 struct fimc_lite *fimc = fmd->fimc_lite[i];
864
865 if (fimc == NULL)
866 continue;
867
868 source = &fimc->subdev.entity;
869 sink = &fimc->ve.vdev.entity;
870 /* FIMC-LITE's subdev and video node */
871 ret = media_create_pad_link(source, FLITE_SD_PAD_SOURCE_DMA,
872 sink, 0, 0);
873 if (ret)
874 break;
875 /* Link from FIMC-LITE to IS-ISP subdev */
876 sink = &fmd->fimc_is->isp.subdev.entity;
877 ret = media_create_pad_link(source, FLITE_SD_PAD_SOURCE_ISP,
878 sink, 0, 0);
879 if (ret)
880 break;
881 }
882
883 return ret;
884 }
885
886 /* Create FIMC-IS links */
887 static int __fimc_md_create_fimc_is_links(struct fimc_md *fmd)
888 {
889 struct fimc_isp *isp = &fmd->fimc_is->isp;
890 struct media_entity *source, *sink;
891 int i, ret;
892
893 source = &isp->subdev.entity;
894
895 for (i = 0; i < FIMC_MAX_DEVS; i++) {
896 if (fmd->fimc[i] == NULL)
897 continue;
898
899 /* Link from FIMC-IS-ISP subdev to FIMC */
900 sink = &fmd->fimc[i]->vid_cap.subdev.entity;
901 ret = media_create_pad_link(source, FIMC_ISP_SD_PAD_SRC_FIFO,
902 sink, FIMC_SD_PAD_SINK_FIFO, 0);
903 if (ret)
904 return ret;
905 }
906
907 /* Link from FIMC-IS-ISP subdev to fimc-is-isp.capture video node */
908 sink = &isp->video_capture.ve.vdev.entity;
909
910 /* Skip this link if the fimc-is-isp video node driver isn't built-in */
911 if (sink->num_pads == 0)
912 return 0;
913
914 return media_create_pad_link(source, FIMC_ISP_SD_PAD_SRC_DMA,
915 sink, 0, 0);
916 }
917
918 /**
919 * fimc_md_create_links - create default links between registered entities
920 * @fmd: fimc media device
921 *
922 * Parallel interface sensor entities are connected directly to FIMC capture
923 * entities. The sensors using MIPI CSIS bus are connected through immutable
924 * link with CSI receiver entity specified by mux_id. Any registered CSIS
925 * entity has a link to each registered FIMC capture entity. Enabled links
926 * are created by default between each subsequent registered sensor and
927 * subsequent FIMC capture entity. The number of default active links is
928 * determined by the number of available sensors or FIMC entities,
929 * whichever is less.
930 */
931 static int fimc_md_create_links(struct fimc_md *fmd)
932 {
933 struct v4l2_subdev *csi_sensors[CSIS_MAX_ENTITIES] = { NULL };
934 struct v4l2_subdev *sensor, *csis;
935 struct fimc_source_info *pdata;
936 struct media_entity *source, *sink;
937 int i, pad, fimc_id = 0, ret = 0;
938 u32 flags, link_mask = 0;
939
940 for (i = 0; i < fmd->num_sensors; i++) {
941 if (fmd->sensor[i].subdev == NULL)
942 continue;
943
944 sensor = fmd->sensor[i].subdev;
945 pdata = v4l2_get_subdev_hostdata(sensor);
946 if (!pdata)
947 continue;
948
949 source = NULL;
950
951 switch (pdata->sensor_bus_type) {
952 case FIMC_BUS_TYPE_MIPI_CSI2:
953 if (WARN(pdata->mux_id >= CSIS_MAX_ENTITIES,
954 "Wrong CSI channel id: %d\n", pdata->mux_id))
955 return -EINVAL;
956
957 csis = fmd->csis[pdata->mux_id].sd;
958 if (WARN(csis == NULL,
959 "MIPI-CSI interface specified but s5p-csis module is not loaded!\n"))
960 return -EINVAL;
961
962 pad = sensor->entity.num_pads - 1;
963 ret = media_create_pad_link(&sensor->entity, pad,
964 &csis->entity, CSIS_PAD_SINK,
965 MEDIA_LNK_FL_IMMUTABLE |
966 MEDIA_LNK_FL_ENABLED);
967 if (ret)
968 return ret;
969
970 v4l2_info(&fmd->v4l2_dev, "created link [%s] => [%s]\n",
971 sensor->entity.name, csis->entity.name);
972
973 source = NULL;
974 csi_sensors[pdata->mux_id] = sensor;
975 break;
976
977 case FIMC_BUS_TYPE_ITU_601...FIMC_BUS_TYPE_ITU_656:
978 source = &sensor->entity;
979 pad = 0;
980 break;
981
982 default:
983 v4l2_err(&fmd->v4l2_dev, "Wrong bus_type: %x\n",
984 pdata->sensor_bus_type);
985 return -EINVAL;
986 }
987 if (source == NULL)
988 continue;
989
990 link_mask = 1 << fimc_id++;
991 ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor,
992 pad, link_mask);
993 }
994
995 for (i = 0; i < CSIS_MAX_ENTITIES; i++) {
996 if (fmd->csis[i].sd == NULL)
997 continue;
998
999 source = &fmd->csis[i].sd->entity;
1000 pad = CSIS_PAD_SOURCE;
1001 sensor = csi_sensors[i];
1002
1003 link_mask = 1 << fimc_id++;
1004 ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor,
1005 pad, link_mask);
1006 }
1007
1008 /* Create immutable links between each FIMC's subdev and video node */
1009 flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED;
1010 for (i = 0; i < FIMC_MAX_DEVS; i++) {
1011 if (!fmd->fimc[i])
1012 continue;
1013
1014 source = &fmd->fimc[i]->vid_cap.subdev.entity;
1015 sink = &fmd->fimc[i]->vid_cap.ve.vdev.entity;
1016
1017 ret = media_create_pad_link(source, FIMC_SD_PAD_SOURCE,
1018 sink, 0, flags);
1019 if (ret)
1020 break;
1021 }
1022
1023 ret = __fimc_md_create_flite_source_links(fmd);
1024 if (ret < 0)
1025 return ret;
1026
1027 if (fmd->use_isp)
1028 ret = __fimc_md_create_fimc_is_links(fmd);
1029
1030 return ret;
1031 }
1032
1033 /*
1034 * The peripheral sensor and CAM_BLK (PIXELASYNCMx) clocks management.
1035 */
1036 static void fimc_md_put_clocks(struct fimc_md *fmd)
1037 {
1038 int i = FIMC_MAX_CAMCLKS;
1039
1040 while (--i >= 0) {
1041 if (IS_ERR(fmd->camclk[i].clock))
1042 continue;
1043 clk_put(fmd->camclk[i].clock);
1044 fmd->camclk[i].clock = ERR_PTR(-EINVAL);
1045 }
1046
1047 /* Writeback (PIXELASYNCMx) clocks */
1048 for (i = 0; i < FIMC_MAX_WBCLKS; i++) {
1049 if (IS_ERR(fmd->wbclk[i]))
1050 continue;
1051 clk_put(fmd->wbclk[i]);
1052 fmd->wbclk[i] = ERR_PTR(-EINVAL);
1053 }
1054 }
1055
1056 static int fimc_md_get_clocks(struct fimc_md *fmd)
1057 {
1058 struct device *dev = &fmd->pdev->dev;
1059 char clk_name[32];
1060 struct clk *clock;
1061 int i, ret = 0;
1062
1063 for (i = 0; i < FIMC_MAX_CAMCLKS; i++)
1064 fmd->camclk[i].clock = ERR_PTR(-EINVAL);
1065
1066 for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
1067 snprintf(clk_name, sizeof(clk_name), "sclk_cam%u", i);
1068 clock = clk_get(dev, clk_name);
1069
1070 if (IS_ERR(clock)) {
1071 dev_err(dev, "Failed to get clock: %s\n", clk_name);
1072 ret = PTR_ERR(clock);
1073 break;
1074 }
1075 fmd->camclk[i].clock = clock;
1076 }
1077 if (ret)
1078 fimc_md_put_clocks(fmd);
1079
1080 if (!fmd->use_isp)
1081 return 0;
1082 /*
1083 * For now get only PIXELASYNCM1 clock (Writeback B/ISP),
1084 * leave PIXELASYNCM0 out for the LCD Writeback driver.
1085 */
1086 fmd->wbclk[CLK_IDX_WB_A] = ERR_PTR(-EINVAL);
1087
1088 for (i = CLK_IDX_WB_B; i < FIMC_MAX_WBCLKS; i++) {
1089 snprintf(clk_name, sizeof(clk_name), "pxl_async%u", i);
1090 clock = clk_get(dev, clk_name);
1091 if (IS_ERR(clock)) {
1092 v4l2_err(&fmd->v4l2_dev, "Failed to get clock: %s\n",
1093 clk_name);
1094 ret = PTR_ERR(clock);
1095 break;
1096 }
1097 fmd->wbclk[i] = clock;
1098 }
1099 if (ret)
1100 fimc_md_put_clocks(fmd);
1101
1102 return ret;
1103 }
1104
1105 static int __fimc_md_modify_pipeline(struct media_entity *entity, bool enable)
1106 {
1107 struct exynos_video_entity *ve;
1108 struct fimc_pipeline *p;
1109 struct video_device *vdev;
1110 int ret;
1111
1112 vdev = media_entity_to_video_device(entity);
1113 if (vdev->entity.use_count == 0)
1114 return 0;
1115
1116 ve = vdev_to_exynos_video_entity(vdev);
1117 p = to_fimc_pipeline(ve->pipe);
1118 /*
1119 * Nothing to do if we are disabling the pipeline, some link
1120 * has been disconnected and p->subdevs array is cleared now.
1121 */
1122 if (!enable && p->subdevs[IDX_SENSOR] == NULL)
1123 return 0;
1124
1125 if (enable)
1126 ret = __fimc_pipeline_open(ve->pipe, entity, true);
1127 else
1128 ret = __fimc_pipeline_close(ve->pipe);
1129
1130 if (ret == 0 && !enable)
1131 memset(p->subdevs, 0, sizeof(p->subdevs));
1132
1133 return ret;
1134 }
1135
1136 /* Locking: called with entity->graph_obj.mdev->graph_mutex mutex held. */
1137 static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable,
1138 struct media_graph *graph)
1139 {
1140 struct media_entity *entity_err = entity;
1141 int ret;
1142
1143 /*
1144 * Walk current graph and call the pipeline open/close routine for each
1145 * opened video node that belongs to the graph of entities connected
1146 * through active links. This is needed as we cannot power on/off the
1147 * subdevs in random order.
1148 */
1149 media_graph_walk_start(graph, entity);
1150
1151 while ((entity = media_graph_walk_next(graph))) {
1152 if (!is_media_entity_v4l2_video_device(entity))
1153 continue;
1154
1155 ret = __fimc_md_modify_pipeline(entity, enable);
1156
1157 if (ret < 0)
1158 goto err;
1159 }
1160
1161 return 0;
1162
1163 err:
1164 media_graph_walk_start(graph, entity_err);
1165
1166 while ((entity_err = media_graph_walk_next(graph))) {
1167 if (!is_media_entity_v4l2_video_device(entity_err))
1168 continue;
1169
1170 __fimc_md_modify_pipeline(entity_err, !enable);
1171
1172 if (entity_err == entity)
1173 break;
1174 }
1175
1176 return ret;
1177 }
1178
1179 static int fimc_md_link_notify(struct media_link *link, unsigned int flags,
1180 unsigned int notification)
1181 {
1182 struct media_graph *graph =
1183 &container_of(link->graph_obj.mdev, struct fimc_md,
1184 media_dev)->link_setup_graph;
1185 struct media_entity *sink = link->sink->entity;
1186 int ret = 0;
1187
1188 /* Before link disconnection */
1189 if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH) {
1190 ret = media_graph_walk_init(graph,
1191 link->graph_obj.mdev);
1192 if (ret)
1193 return ret;
1194 if (!(flags & MEDIA_LNK_FL_ENABLED))
1195 ret = __fimc_md_modify_pipelines(sink, false, graph);
1196 #if 0
1197 else
1198 /* TODO: Link state change validation */
1199 #endif
1200 /* After link activation */
1201 } else if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH) {
1202 if (link->flags & MEDIA_LNK_FL_ENABLED)
1203 ret = __fimc_md_modify_pipelines(sink, true, graph);
1204 media_graph_walk_cleanup(graph);
1205 }
1206
1207 return ret ? -EPIPE : 0;
1208 }
1209
1210 static const struct media_device_ops fimc_md_ops = {
1211 .link_notify = fimc_md_link_notify,
1212 };
1213
1214 static ssize_t fimc_md_sysfs_show(struct device *dev,
1215 struct device_attribute *attr, char *buf)
1216 {
1217 struct fimc_md *fmd = dev_get_drvdata(dev);
1218
1219 if (fmd->user_subdev_api)
1220 return strscpy(buf, "Sub-device API (sub-dev)\n", PAGE_SIZE);
1221
1222 return strscpy(buf, "V4L2 video node only API (vid-dev)\n", PAGE_SIZE);
1223 }
1224
1225 static ssize_t fimc_md_sysfs_store(struct device *dev,
1226 struct device_attribute *attr,
1227 const char *buf, size_t count)
1228 {
1229 struct fimc_md *fmd = dev_get_drvdata(dev);
1230 bool subdev_api;
1231 int i;
1232
1233 if (!strcmp(buf, "vid-dev\n"))
1234 subdev_api = false;
1235 else if (!strcmp(buf, "sub-dev\n"))
1236 subdev_api = true;
1237 else
1238 return count;
1239
1240 fmd->user_subdev_api = subdev_api;
1241 for (i = 0; i < FIMC_MAX_DEVS; i++)
1242 if (fmd->fimc[i])
1243 fmd->fimc[i]->vid_cap.user_subdev_api = subdev_api;
1244 return count;
1245 }
1246 /*
1247 * This device attribute is to select video pipeline configuration method.
1248 * There are following valid values:
1249 * vid-dev - for V4L2 video node API only, subdevice will be configured
1250 * by the host driver.
1251 * sub-dev - for media controller API, subdevs must be configured in user
1252 * space before starting streaming.
1253 */
1254 static DEVICE_ATTR(subdev_conf_mode, S_IWUSR | S_IRUGO,
1255 fimc_md_sysfs_show, fimc_md_sysfs_store);
1256
1257 static int fimc_md_get_pinctrl(struct fimc_md *fmd)
1258 {
1259 struct device *dev = &fmd->pdev->dev;
1260 struct fimc_pinctrl *pctl = &fmd->pinctl;
1261
1262 pctl->pinctrl = devm_pinctrl_get(dev);
1263 if (IS_ERR(pctl->pinctrl))
1264 return PTR_ERR(pctl->pinctrl);
1265
1266 pctl->state_default = pinctrl_lookup_state(pctl->pinctrl,
1267 PINCTRL_STATE_DEFAULT);
1268 if (IS_ERR(pctl->state_default))
1269 return PTR_ERR(pctl->state_default);
1270
1271 pctl->state_idle = pinctrl_lookup_state(pctl->pinctrl,
1272 PINCTRL_STATE_IDLE);
1273 return 0;
1274 }
1275
1276 static int cam_clk_prepare(struct clk_hw *hw)
1277 {
1278 struct cam_clk *camclk = to_cam_clk(hw);
1279 int ret;
1280
1281 if (camclk->fmd->pmf == NULL)
1282 return -ENODEV;
1283
1284 ret = pm_runtime_get_sync(camclk->fmd->pmf);
1285 return ret < 0 ? ret : 0;
1286 }
1287
1288 static void cam_clk_unprepare(struct clk_hw *hw)
1289 {
1290 struct cam_clk *camclk = to_cam_clk(hw);
1291
1292 if (camclk->fmd->pmf == NULL)
1293 return;
1294
1295 pm_runtime_put_sync(camclk->fmd->pmf);
1296 }
1297
1298 static const struct clk_ops cam_clk_ops = {
1299 .prepare = cam_clk_prepare,
1300 .unprepare = cam_clk_unprepare,
1301 };
1302
1303 static void fimc_md_unregister_clk_provider(struct fimc_md *fmd)
1304 {
1305 struct cam_clk_provider *cp = &fmd->clk_provider;
1306 unsigned int i;
1307
1308 if (cp->of_node)
1309 of_clk_del_provider(cp->of_node);
1310
1311 for (i = 0; i < cp->num_clocks; i++)
1312 clk_unregister(cp->clks[i]);
1313 }
1314
1315 static int fimc_md_register_clk_provider(struct fimc_md *fmd)
1316 {
1317 struct cam_clk_provider *cp = &fmd->clk_provider;
1318 struct device *dev = &fmd->pdev->dev;
1319 int i, ret;
1320
1321 for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
1322 struct cam_clk *camclk = &cp->camclk[i];
1323 struct clk_init_data init;
1324 const char *p_name;
1325
1326 ret = of_property_read_string_index(dev->of_node,
1327 "clock-output-names", i, &init.name);
1328 if (ret < 0)
1329 break;
1330
1331 p_name = __clk_get_name(fmd->camclk[i].clock);
1332
1333 /* It's safe since clk_register() will duplicate the string. */
1334 init.parent_names = &p_name;
1335 init.num_parents = 1;
1336 init.ops = &cam_clk_ops;
1337 init.flags = CLK_SET_RATE_PARENT;
1338 camclk->hw.init = &init;
1339 camclk->fmd = fmd;
1340
1341 cp->clks[i] = clk_register(NULL, &camclk->hw);
1342 if (IS_ERR(cp->clks[i])) {
1343 dev_err(dev, "failed to register clock: %s (%ld)\n",
1344 init.name, PTR_ERR(cp->clks[i]));
1345 ret = PTR_ERR(cp->clks[i]);
1346 goto err;
1347 }
1348 cp->num_clocks++;
1349 }
1350
1351 if (cp->num_clocks == 0) {
1352 dev_warn(dev, "clk provider not registered\n");
1353 return 0;
1354 }
1355
1356 cp->clk_data.clks = cp->clks;
1357 cp->clk_data.clk_num = cp->num_clocks;
1358 cp->of_node = dev->of_node;
1359 ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get,
1360 &cp->clk_data);
1361 if (ret == 0)
1362 return 0;
1363 err:
1364 fimc_md_unregister_clk_provider(fmd);
1365 return ret;
1366 }
1367
1368 static int subdev_notifier_bound(struct v4l2_async_notifier *notifier,
1369 struct v4l2_subdev *subdev,
1370 struct v4l2_async_subdev *asd)
1371 {
1372 struct fimc_md *fmd = notifier_to_fimc_md(notifier);
1373 struct fimc_sensor_info *si = NULL;
1374 int i;
1375
1376 /* Find platform data for this sensor subdev */
1377 for (i = 0; i < ARRAY_SIZE(fmd->sensor); i++)
1378 if (fmd->sensor[i].asd.match.fwnode ==
1379 of_fwnode_handle(subdev->dev->of_node))
1380 si = &fmd->sensor[i];
1381
1382 if (si == NULL)
1383 return -EINVAL;
1384
1385 v4l2_set_subdev_hostdata(subdev, &si->pdata);
1386
1387 if (si->pdata.fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK)
1388 subdev->grp_id = GRP_ID_FIMC_IS_SENSOR;
1389 else
1390 subdev->grp_id = GRP_ID_SENSOR;
1391
1392 si->subdev = subdev;
1393
1394 v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice: %s (%d)\n",
1395 subdev->name, fmd->num_sensors);
1396
1397 fmd->num_sensors++;
1398
1399 return 0;
1400 }
1401
1402 static int subdev_notifier_complete(struct v4l2_async_notifier *notifier)
1403 {
1404 struct fimc_md *fmd = notifier_to_fimc_md(notifier);
1405 int ret;
1406
1407 mutex_lock(&fmd->media_dev.graph_mutex);
1408
1409 ret = fimc_md_create_links(fmd);
1410 if (ret < 0)
1411 goto unlock;
1412
1413 ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev);
1414 unlock:
1415 mutex_unlock(&fmd->media_dev.graph_mutex);
1416 if (ret < 0)
1417 return ret;
1418
1419 return media_device_register(&fmd->media_dev);
1420 }
1421
1422 static const struct v4l2_async_notifier_operations subdev_notifier_ops = {
1423 .bound = subdev_notifier_bound,
1424 .complete = subdev_notifier_complete,
1425 };
1426
1427 static int fimc_md_probe(struct platform_device *pdev)
1428 {
1429 struct device *dev = &pdev->dev;
1430 struct v4l2_device *v4l2_dev;
1431 struct fimc_md *fmd;
1432 int ret;
1433
1434 fmd = devm_kzalloc(dev, sizeof(*fmd), GFP_KERNEL);
1435 if (!fmd)
1436 return -ENOMEM;
1437
1438 spin_lock_init(&fmd->slock);
1439 INIT_LIST_HEAD(&fmd->pipelines);
1440 fmd->pdev = pdev;
1441
1442 strscpy(fmd->media_dev.model, "SAMSUNG S5P FIMC",
1443 sizeof(fmd->media_dev.model));
1444 fmd->media_dev.ops = &fimc_md_ops;
1445 fmd->media_dev.dev = dev;
1446
1447 v4l2_dev = &fmd->v4l2_dev;
1448 v4l2_dev->mdev = &fmd->media_dev;
1449 v4l2_dev->notify = fimc_sensor_notify;
1450 strscpy(v4l2_dev->name, "s5p-fimc-md", sizeof(v4l2_dev->name));
1451
1452 fmd->use_isp = fimc_md_is_isp_available(dev->of_node);
1453 fmd->user_subdev_api = true;
1454
1455 media_device_init(&fmd->media_dev);
1456
1457 ret = v4l2_device_register(dev, &fmd->v4l2_dev);
1458 if (ret < 0) {
1459 v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret);
1460 goto err_md;
1461 }
1462
1463 ret = fimc_md_get_clocks(fmd);
1464 if (ret)
1465 goto err_v4l2dev;
1466
1467 ret = fimc_md_get_pinctrl(fmd);
1468 if (ret < 0) {
1469 if (ret != EPROBE_DEFER)
1470 dev_err(dev, "Failed to get pinctrl: %d\n", ret);
1471 goto err_clk;
1472 }
1473
1474 platform_set_drvdata(pdev, fmd);
1475
1476 v4l2_async_notifier_init(&fmd->subdev_notifier);
1477
1478 ret = fimc_md_register_platform_entities(fmd, dev->of_node);
1479 if (ret)
1480 goto err_clk;
1481
1482 ret = fimc_md_register_sensor_entities(fmd);
1483 if (ret)
1484 goto err_m_ent;
1485
1486 ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1487 if (ret)
1488 goto err_cleanup;
1489 /*
1490 * FIMC platform devices need to be registered before the sclk_cam
1491 * clocks provider, as one of these devices needs to be activated
1492 * to enable the clock.
1493 */
1494 ret = fimc_md_register_clk_provider(fmd);
1495 if (ret < 0) {
1496 v4l2_err(v4l2_dev, "clock provider registration failed\n");
1497 goto err_attr;
1498 }
1499
1500 if (fmd->num_sensors > 0) {
1501 fmd->subdev_notifier.ops = &subdev_notifier_ops;
1502 fmd->num_sensors = 0;
1503
1504 ret = v4l2_async_notifier_register(&fmd->v4l2_dev,
1505 &fmd->subdev_notifier);
1506 if (ret)
1507 goto err_clk_p;
1508 }
1509
1510 return 0;
1511
1512 err_clk_p:
1513 fimc_md_unregister_clk_provider(fmd);
1514 err_attr:
1515 device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1516 err_cleanup:
1517 v4l2_async_notifier_cleanup(&fmd->subdev_notifier);
1518 err_m_ent:
1519 fimc_md_unregister_entities(fmd);
1520 err_clk:
1521 fimc_md_put_clocks(fmd);
1522 err_v4l2dev:
1523 v4l2_device_unregister(&fmd->v4l2_dev);
1524 err_md:
1525 media_device_cleanup(&fmd->media_dev);
1526 return ret;
1527 }
1528
1529 static int fimc_md_remove(struct platform_device *pdev)
1530 {
1531 struct fimc_md *fmd = platform_get_drvdata(pdev);
1532
1533 if (!fmd)
1534 return 0;
1535
1536 fimc_md_unregister_clk_provider(fmd);
1537 v4l2_async_notifier_unregister(&fmd->subdev_notifier);
1538 v4l2_async_notifier_cleanup(&fmd->subdev_notifier);
1539
1540 v4l2_device_unregister(&fmd->v4l2_dev);
1541 device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1542 fimc_md_unregister_entities(fmd);
1543 fimc_md_pipelines_free(fmd);
1544 media_device_unregister(&fmd->media_dev);
1545 media_device_cleanup(&fmd->media_dev);
1546 fimc_md_put_clocks(fmd);
1547
1548 return 0;
1549 }
1550
1551 static const struct platform_device_id fimc_driver_ids[] __always_unused = {
1552 { .name = "s5p-fimc-md" },
1553 { },
1554 };
1555 MODULE_DEVICE_TABLE(platform, fimc_driver_ids);
1556
1557 static const struct of_device_id fimc_md_of_match[] = {
1558 { .compatible = "samsung,fimc" },
1559 { },
1560 };
1561 MODULE_DEVICE_TABLE(of, fimc_md_of_match);
1562
1563 static struct platform_driver fimc_md_driver = {
1564 .probe = fimc_md_probe,
1565 .remove = fimc_md_remove,
1566 .driver = {
1567 .of_match_table = of_match_ptr(fimc_md_of_match),
1568 .name = "s5p-fimc-md",
1569 }
1570 };
1571
1572 static int __init fimc_md_init(void)
1573 {
1574 int ret;
1575
1576 request_module("s5p-csis");
1577 ret = fimc_register_driver();
1578 if (ret)
1579 return ret;
1580
1581 return platform_driver_register(&fimc_md_driver);
1582 }
1583
1584 static void __exit fimc_md_exit(void)
1585 {
1586 platform_driver_unregister(&fimc_md_driver);
1587 fimc_unregister_driver();
1588 }
1589
1590 module_init(fimc_md_init);
1591 module_exit(fimc_md_exit);
1592
1593 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
1594 MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver");
1595 MODULE_LICENSE("GPL");
1596 MODULE_VERSION("2.0.1");
Linux with added FPC-III support