projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
[media] media-device: split media initialization and registration
[deliverable/linux.git] / drivers / media / platform / exynos4-is / media-dev.c
1 /*
2 * S5P/EXYNOS4 SoC series camera host interface media device driver
3 *
4 * Copyright (C) 2011 - 2013 Samsung Electronics Co., Ltd.
5 * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
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
9 * by the Free Software Foundation, either version 2 of the License,
10 * or (at your option) any later version.
11 */
12
13 #include <linux/bug.h>
14 #include <linux/clk.h>
15 #include <linux/clk-provider.h>
16 #include <linux/device.h>
17 #include <linux/errno.h>
18 #include <linux/i2c.h>
19 #include <linux/kernel.h>
20 #include <linux/list.h>
21 #include <linux/module.h>
22 #include <linux/of.h>
23 #include <linux/of_platform.h>
24 #include <linux/of_device.h>
25 #include <linux/of_graph.h>
26 #include <linux/platform_device.h>
27 #include <linux/pm_runtime.h>
28 #include <linux/types.h>
29 #include <linux/slab.h>
30 #include <media/v4l2-async.h>
31 #include <media/v4l2-ctrls.h>
32 #include <media/v4l2-of.h>
33 #include <media/media-device.h>
34 #include <media/drv-intf/exynos-fimc.h>
35
36 #include "media-dev.h"
37 #include "fimc-core.h"
38 #include "fimc-is.h"
39 #include "fimc-lite.h"
40 #include "mipi-csis.h"
41
42 /* Set up image sensor subdev -> FIMC capture node notifications. */
43 static void __setup_sensor_notification(struct fimc_md *fmd,
44 struct v4l2_subdev *sensor,
45 struct v4l2_subdev *fimc_sd)
46 {
47 struct fimc_source_info *src_inf;
48 struct fimc_sensor_info *md_si;
49 unsigned long flags;
50
51 src_inf = v4l2_get_subdev_hostdata(sensor);
52 if (!src_inf || WARN_ON(fmd == NULL))
53 return;
54
55 md_si = source_to_sensor_info(src_inf);
56 spin_lock_irqsave(&fmd->slock, flags);
57 md_si->host = v4l2_get_subdevdata(fimc_sd);
58 spin_unlock_irqrestore(&fmd->slock, flags);
59 }
60
61 /**
62 * fimc_pipeline_prepare - update pipeline information with subdevice pointers
63 * @me: media entity terminating the pipeline
64 *
65 * Caller holds the graph mutex.
66 */
67 static void fimc_pipeline_prepare(struct fimc_pipeline *p,
68 struct media_entity *me)
69 {
70 struct fimc_md *fmd = entity_to_fimc_mdev(me);
71 struct v4l2_subdev *sd;
72 struct v4l2_subdev *sensor = NULL;
73 int i;
74
75 for (i = 0; i < IDX_MAX; i++)
76 p->subdevs[i] = NULL;
77
78 while (1) {
79 struct media_pad *pad = NULL;
80
81 /* Find remote source pad */
82 for (i = 0; i < me->num_pads; i++) {
83 struct media_pad *spad = &me->pads[i];
84 if (!(spad->flags & MEDIA_PAD_FL_SINK))
85 continue;
86 pad = media_entity_remote_pad(spad);
87 if (pad)
88 break;
89 }
90
91 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
92 break;
93 sd = media_entity_to_v4l2_subdev(pad->entity);
94
95 switch (sd->grp_id) {
96 case GRP_ID_SENSOR:
97 sensor = sd;
98 /* fall through */
99 case GRP_ID_FIMC_IS_SENSOR:
100 p->subdevs[IDX_SENSOR] = sd;
101 break;
102 case GRP_ID_CSIS:
103 p->subdevs[IDX_CSIS] = sd;
104 break;
105 case GRP_ID_FLITE:
106 p->subdevs[IDX_FLITE] = sd;
107 break;
108 case GRP_ID_FIMC:
109 p->subdevs[IDX_FIMC] = sd;
110 break;
111 case GRP_ID_FIMC_IS:
112 p->subdevs[IDX_IS_ISP] = sd;
113 break;
114 default:
115 break;
116 }
117 me = &sd->entity;
118 if (me->num_pads == 1)
119 break;
120 }
121
122 if (sensor && p->subdevs[IDX_FIMC])
123 __setup_sensor_notification(fmd, sensor, p->subdevs[IDX_FIMC]);
124 }
125
126 /**
127 * __subdev_set_power - change power state of a single subdev
128 * @sd: subdevice to change power state for
129 * @on: 1 to enable power or 0 to disable
130 *
131 * Return result of s_power subdev operation or -ENXIO if sd argument
132 * is NULL. Return 0 if the subdevice does not implement s_power.
133 */
134 static int __subdev_set_power(struct v4l2_subdev *sd, int on)
135 {
136 int *use_count;
137 int ret;
138
139 if (sd == NULL)
140 return -ENXIO;
141
142 use_count = &sd->entity.use_count;
143 if (on && (*use_count)++ > 0)
144 return 0;
145 else if (!on && (*use_count == 0 || --(*use_count) > 0))
146 return 0;
147 ret = v4l2_subdev_call(sd, core, s_power, on);
148
149 return ret != -ENOIOCTLCMD ? ret : 0;
150 }
151
152 /**
153 * fimc_pipeline_s_power - change power state of all pipeline subdevs
154 * @fimc: fimc device terminating the pipeline
155 * @state: true to power on, false to power off
156 *
157 * Needs to be called with the graph mutex held.
158 */
159 static int fimc_pipeline_s_power(struct fimc_pipeline *p, bool on)
160 {
161 static const u8 seq[2][IDX_MAX - 1] = {
162 { IDX_IS_ISP, IDX_SENSOR, IDX_CSIS, IDX_FLITE },
163 { IDX_CSIS, IDX_FLITE, IDX_SENSOR, IDX_IS_ISP },
164 };
165 int i, ret = 0;
166
167 if (p->subdevs[IDX_SENSOR] == NULL)
168 return -ENXIO;
169
170 for (i = 0; i < IDX_MAX - 1; i++) {
171 unsigned int idx = seq[on][i];
172
173 ret = __subdev_set_power(p->subdevs[idx], on);
174
175
176 if (ret < 0 && ret != -ENXIO)
177 goto error;
178 }
179 return 0;
180 error:
181 for (; i >= 0; i--) {
182 unsigned int idx = seq[on][i];
183 __subdev_set_power(p->subdevs[idx], !on);
184 }
185 return ret;
186 }
187
188 /**
189 * __fimc_pipeline_open - update the pipeline information, enable power
190 * of all pipeline subdevs and the sensor clock
191 * @me: media entity to start graph walk with
192 * @prepare: true to walk the current pipeline and acquire all subdevs
193 *
194 * Called with the graph mutex held.
195 */
196 static int __fimc_pipeline_open(struct exynos_media_pipeline *ep,
197 struct media_entity *me, bool prepare)
198 {
199 struct fimc_md *fmd = entity_to_fimc_mdev(me);
200 struct fimc_pipeline *p = to_fimc_pipeline(ep);
201 struct v4l2_subdev *sd;
202 int ret;
203
204 if (WARN_ON(p == NULL || me == NULL))
205 return -EINVAL;
206
207 if (prepare)
208 fimc_pipeline_prepare(p, me);
209
210 sd = p->subdevs[IDX_SENSOR];
211 if (sd == NULL)
212 return -EINVAL;
213
214 /* Disable PXLASYNC clock if this pipeline includes FIMC-IS */
215 if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP]) {
216 ret = clk_prepare_enable(fmd->wbclk[CLK_IDX_WB_B]);
217 if (ret < 0)
218 return ret;
219 }
220
221 ret = fimc_pipeline_s_power(p, 1);
222 if (!ret)
223 return 0;
224
225 if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP])
226 clk_disable_unprepare(fmd->wbclk[CLK_IDX_WB_B]);
227
228 return ret;
229 }
230
231 /**
232 * __fimc_pipeline_close - disable the sensor clock and pipeline power
233 * @fimc: fimc device terminating the pipeline
234 *
235 * Disable power of all subdevs and turn the external sensor clock off.
236 */
237 static int __fimc_pipeline_close(struct exynos_media_pipeline *ep)
238 {
239 struct fimc_pipeline *p = to_fimc_pipeline(ep);
240 struct v4l2_subdev *sd = p ? p->subdevs[IDX_SENSOR] : NULL;
241 struct fimc_md *fmd;
242 int ret;
243
244 if (sd == NULL) {
245 pr_warn("%s(): No sensor subdev\n", __func__);
246 return 0;
247 }
248
249 ret = fimc_pipeline_s_power(p, 0);
250
251 fmd = entity_to_fimc_mdev(&sd->entity);
252
253 /* Disable PXLASYNC clock if this pipeline includes FIMC-IS */
254 if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP])
255 clk_disable_unprepare(fmd->wbclk[CLK_IDX_WB_B]);
256
257 return ret == -ENXIO ? 0 : ret;
258 }
259
260 /**
261 * __fimc_pipeline_s_stream - call s_stream() on pipeline subdevs
262 * @pipeline: video pipeline structure
263 * @on: passed as the s_stream() callback argument
264 */
265 static int __fimc_pipeline_s_stream(struct exynos_media_pipeline *ep, bool on)
266 {
267 static const u8 seq[2][IDX_MAX] = {
268 { IDX_FIMC, IDX_SENSOR, IDX_IS_ISP, IDX_CSIS, IDX_FLITE },
269 { IDX_CSIS, IDX_FLITE, IDX_FIMC, IDX_SENSOR, IDX_IS_ISP },
270 };
271 struct fimc_pipeline *p = to_fimc_pipeline(ep);
272 int i, ret = 0;
273
274 if (p->subdevs[IDX_SENSOR] == NULL)
275 return -ENODEV;
276
277 for (i = 0; i < IDX_MAX; i++) {
278 unsigned int idx = seq[on][i];
279
280 ret = v4l2_subdev_call(p->subdevs[idx], video, s_stream, on);
281
282 if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
283 goto error;
284 }
285 return 0;
286 error:
287 for (; i >= 0; i--) {
288 unsigned int idx = seq[on][i];
289 v4l2_subdev_call(p->subdevs[idx], video, s_stream, !on);
290 }
291 return ret;
292 }
293
294 /* Media pipeline operations for the FIMC/FIMC-LITE video device driver */
295 static const struct exynos_media_pipeline_ops fimc_pipeline_ops = {
296 .open = __fimc_pipeline_open,
297 .close = __fimc_pipeline_close,
298 .set_stream = __fimc_pipeline_s_stream,
299 };
300
301 static struct exynos_media_pipeline *fimc_md_pipeline_create(
302 struct fimc_md *fmd)
303 {
304 struct fimc_pipeline *p;
305
306 p = kzalloc(sizeof(*p), GFP_KERNEL);
307 if (!p)
308 return NULL;
309
310 list_add_tail(&p->list, &fmd->pipelines);
311
312 p->ep.ops = &fimc_pipeline_ops;
313 return &p->ep;
314 }
315
316 static void fimc_md_pipelines_free(struct fimc_md *fmd)
317 {
318 while (!list_empty(&fmd->pipelines)) {
319 struct fimc_pipeline *p;
320
321 p = list_entry(fmd->pipelines.next, typeof(*p), list);
322 list_del(&p->list);
323 kfree(p);
324 }
325 }
326
327 /* Parse port node and register as a sub-device any sensor specified there. */
328 static int fimc_md_parse_port_node(struct fimc_md *fmd,
329 struct device_node *port,
330 unsigned int index)
331 {
332 struct fimc_source_info *pd = &fmd->sensor[index].pdata;
333 struct device_node *rem, *ep, *np;
334 struct v4l2_of_endpoint endpoint;
335
336 /* Assume here a port node can have only one endpoint node. */
337 ep = of_get_next_child(port, NULL);
338 if (!ep)
339 return 0;
340
341 v4l2_of_parse_endpoint(ep, &endpoint);
342 if (WARN_ON(endpoint.base.port == 0) || index >= FIMC_MAX_SENSORS)
343 return -EINVAL;
344
345 pd->mux_id = (endpoint.base.port - 1) & 0x1;
346
347 rem = of_graph_get_remote_port_parent(ep);
348 of_node_put(ep);
349 if (rem == NULL) {
350 v4l2_info(&fmd->v4l2_dev, "Remote device at %s not found\n",
351 ep->full_name);
352 return 0;
353 }
354
355 if (fimc_input_is_parallel(endpoint.base.port)) {
356 if (endpoint.bus_type == V4L2_MBUS_PARALLEL)
357 pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_601;
358 else
359 pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_656;
360 pd->flags = endpoint.bus.parallel.flags;
361 } else if (fimc_input_is_mipi_csi(endpoint.base.port)) {
362 /*
363 * MIPI CSI-2: only input mux selection and
364 * the sensor's clock frequency is needed.
365 */
366 pd->sensor_bus_type = FIMC_BUS_TYPE_MIPI_CSI2;
367 } else {
368 v4l2_err(&fmd->v4l2_dev, "Wrong port id (%u) at node %s\n",
369 endpoint.base.port, rem->full_name);
370 }
371 /*
372 * For FIMC-IS handled sensors, that are placed under i2c-isp device
373 * node, FIMC is connected to the FIMC-IS through its ISP Writeback
374 * input. Sensors are attached to the FIMC-LITE hostdata interface
375 * directly or through MIPI-CSIS, depending on the external media bus
376 * used. This needs to be handled in a more reliable way, not by just
377 * checking parent's node name.
378 */
379 np = of_get_parent(rem);
380
381 if (np && !of_node_cmp(np->name, "i2c-isp"))
382 pd->fimc_bus_type = FIMC_BUS_TYPE_ISP_WRITEBACK;
383 else
384 pd->fimc_bus_type = pd->sensor_bus_type;
385
386 if (WARN_ON(index >= ARRAY_SIZE(fmd->sensor)))
387 return -EINVAL;
388
389 fmd->sensor[index].asd.match_type = V4L2_ASYNC_MATCH_OF;
390 fmd->sensor[index].asd.match.of.node = rem;
391 fmd->async_subdevs[index] = &fmd->sensor[index].asd;
392
393 fmd->num_sensors++;
394
395 of_node_put(rem);
396 return 0;
397 }
398
399 /* Register all SoC external sub-devices */
400 static int fimc_md_register_sensor_entities(struct fimc_md *fmd)
401 {
402 struct device_node *parent = fmd->pdev->dev.of_node;
403 struct device_node *node, *ports;
404 int index = 0;
405 int ret;
406
407 /*
408 * Runtime resume one of the FIMC entities to make sure
409 * the sclk_cam clocks are not globally disabled.
410 */
411 if (!fmd->pmf)
412 return -ENXIO;
413
414 ret = pm_runtime_get_sync(fmd->pmf);
415 if (ret < 0)
416 return ret;
417
418 fmd->num_sensors = 0;
419
420 /* Attach sensors linked to MIPI CSI-2 receivers */
421 for_each_available_child_of_node(parent, node) {
422 struct device_node *port;
423
424 if (of_node_cmp(node->name, "csis"))
425 continue;
426 /* The csis node can have only port subnode. */
427 port = of_get_next_child(node, NULL);
428 if (!port)
429 continue;
430
431 ret = fimc_md_parse_port_node(fmd, port, index);
432 if (ret < 0)
433 goto rpm_put;
434 index++;
435 }
436
437 /* Attach sensors listed in the parallel-ports node */
438 ports = of_get_child_by_name(parent, "parallel-ports");
439 if (!ports)
440 goto rpm_put;
441
442 for_each_child_of_node(ports, node) {
443 ret = fimc_md_parse_port_node(fmd, node, index);
444 if (ret < 0)
445 break;
446 index++;
447 }
448 rpm_put:
449 pm_runtime_put(fmd->pmf);
450 return ret;
451 }
452
453 static int __of_get_csis_id(struct device_node *np)
454 {
455 u32 reg = 0;
456
457 np = of_get_child_by_name(np, "port");
458 if (!np)
459 return -EINVAL;
460 of_property_read_u32(np, "reg", &reg);
461 return reg - FIMC_INPUT_MIPI_CSI2_0;
462 }
463
464 /*
465 * MIPI-CSIS, FIMC and FIMC-LITE platform devices registration.
466 */
467 static int register_fimc_lite_entity(struct fimc_md *fmd,
468 struct fimc_lite *fimc_lite)
469 {
470 struct v4l2_subdev *sd;
471 struct exynos_media_pipeline *ep;
472 int ret;
473
474 if (WARN_ON(fimc_lite->index >= FIMC_LITE_MAX_DEVS ||
475 fmd->fimc_lite[fimc_lite->index]))
476 return -EBUSY;
477
478 sd = &fimc_lite->subdev;
479 sd->grp_id = GRP_ID_FLITE;
480
481 ep = fimc_md_pipeline_create(fmd);
482 if (!ep)
483 return -ENOMEM;
484
485 v4l2_set_subdev_hostdata(sd, ep);
486
487 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
488 if (!ret)
489 fmd->fimc_lite[fimc_lite->index] = fimc_lite;
490 else
491 v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.LITE%d\n",
492 fimc_lite->index);
493 return ret;
494 }
495
496 static int register_fimc_entity(struct fimc_md *fmd, struct fimc_dev *fimc)
497 {
498 struct v4l2_subdev *sd;
499 struct exynos_media_pipeline *ep;
500 int ret;
501
502 if (WARN_ON(fimc->id >= FIMC_MAX_DEVS || fmd->fimc[fimc->id]))
503 return -EBUSY;
504
505 sd = &fimc->vid_cap.subdev;
506 sd->grp_id = GRP_ID_FIMC;
507
508 ep = fimc_md_pipeline_create(fmd);
509 if (!ep)
510 return -ENOMEM;
511
512 v4l2_set_subdev_hostdata(sd, ep);
513
514 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
515 if (!ret) {
516 if (!fmd->pmf && fimc->pdev)
517 fmd->pmf = &fimc->pdev->dev;
518 fmd->fimc[fimc->id] = fimc;
519 fimc->vid_cap.user_subdev_api = fmd->user_subdev_api;
520 } else {
521 v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.%d (%d)\n",
522 fimc->id, ret);
523 }
524 return ret;
525 }
526
527 static int register_csis_entity(struct fimc_md *fmd,
528 struct platform_device *pdev,
529 struct v4l2_subdev *sd)
530 {
531 struct device_node *node = pdev->dev.of_node;
532 int id, ret;
533
534 id = node ? __of_get_csis_id(node) : max(0, pdev->id);
535
536 if (WARN_ON(id < 0 || id >= CSIS_MAX_ENTITIES))
537 return -ENOENT;
538
539 if (WARN_ON(fmd->csis[id].sd))
540 return -EBUSY;
541
542 sd->grp_id = GRP_ID_CSIS;
543 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
544 if (!ret)
545 fmd->csis[id].sd = sd;
546 else
547 v4l2_err(&fmd->v4l2_dev,
548 "Failed to register MIPI-CSIS.%d (%d)\n", id, ret);
549 return ret;
550 }
551
552 static int register_fimc_is_entity(struct fimc_md *fmd, struct fimc_is *is)
553 {
554 struct v4l2_subdev *sd = &is->isp.subdev;
555 struct exynos_media_pipeline *ep;
556 int ret;
557
558 /* Allocate pipeline object for the ISP capture video node. */
559 ep = fimc_md_pipeline_create(fmd);
560 if (!ep)
561 return -ENOMEM;
562
563 v4l2_set_subdev_hostdata(sd, ep);
564
565 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
566 if (ret) {
567 v4l2_err(&fmd->v4l2_dev,
568 "Failed to register FIMC-ISP (%d)\n", ret);
569 return ret;
570 }
571
572 fmd->fimc_is = is;
573 return 0;
574 }
575
576 static int fimc_md_register_platform_entity(struct fimc_md *fmd,
577 struct platform_device *pdev,
578 int plat_entity)
579 {
580 struct device *dev = &pdev->dev;
581 int ret = -EPROBE_DEFER;
582 void *drvdata;
583
584 /* Lock to ensure dev->driver won't change. */
585 device_lock(dev);
586
587 if (!dev->driver || !try_module_get(dev->driver->owner))
588 goto dev_unlock;
589
590 drvdata = dev_get_drvdata(dev);
591 /* Some subdev didn't probe successfully id drvdata is NULL */
592 if (drvdata) {
593 switch (plat_entity) {
594 case IDX_FIMC:
595 ret = register_fimc_entity(fmd, drvdata);
596 break;
597 case IDX_FLITE:
598 ret = register_fimc_lite_entity(fmd, drvdata);
599 break;
600 case IDX_CSIS:
601 ret = register_csis_entity(fmd, pdev, drvdata);
602 break;
603 case IDX_IS_ISP:
604 ret = register_fimc_is_entity(fmd, drvdata);
605 break;
606 default:
607 ret = -ENODEV;
608 }
609 }
610
611 module_put(dev->driver->owner);
612 dev_unlock:
613 device_unlock(dev);
614 if (ret == -EPROBE_DEFER)
615 dev_info(&fmd->pdev->dev, "deferring %s device registration\n",
616 dev_name(dev));
617 else if (ret < 0)
618 dev_err(&fmd->pdev->dev, "%s device registration failed (%d)\n",
619 dev_name(dev), ret);
620 return ret;
621 }
622
623 /* Register FIMC, FIMC-LITE and CSIS media entities */
624 static int fimc_md_register_platform_entities(struct fimc_md *fmd,
625 struct device_node *parent)
626 {
627 struct device_node *node;
628 int ret = 0;
629
630 for_each_available_child_of_node(parent, node) {
631 struct platform_device *pdev;
632 int plat_entity = -1;
633
634 pdev = of_find_device_by_node(node);
635 if (!pdev)
636 continue;
637
638 /* If driver of any entity isn't ready try all again later. */
639 if (!strcmp(node->name, CSIS_OF_NODE_NAME))
640 plat_entity = IDX_CSIS;
641 else if (!strcmp(node->name, FIMC_IS_OF_NODE_NAME))
642 plat_entity = IDX_IS_ISP;
643 else if (!strcmp(node->name, FIMC_LITE_OF_NODE_NAME))
644 plat_entity = IDX_FLITE;
645 else if (!strcmp(node->name, FIMC_OF_NODE_NAME) &&
646 !of_property_read_bool(node, "samsung,lcd-wb"))
647 plat_entity = IDX_FIMC;
648
649 if (plat_entity >= 0)
650 ret = fimc_md_register_platform_entity(fmd, pdev,
651 plat_entity);
652 put_device(&pdev->dev);
653 if (ret < 0)
654 break;
655 }
656
657 return ret;
658 }
659
660 static void fimc_md_unregister_entities(struct fimc_md *fmd)
661 {
662 int i;
663
664 for (i = 0; i < FIMC_MAX_DEVS; i++) {
665 struct fimc_dev *dev = fmd->fimc[i];
666 if (dev == NULL)
667 continue;
668 v4l2_device_unregister_subdev(&dev->vid_cap.subdev);
669 dev->vid_cap.ve.pipe = NULL;
670 fmd->fimc[i] = NULL;
671 }
672 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
673 struct fimc_lite *dev = fmd->fimc_lite[i];
674 if (dev == NULL)
675 continue;
676 v4l2_device_unregister_subdev(&dev->subdev);
677 dev->ve.pipe = NULL;
678 fmd->fimc_lite[i] = NULL;
679 }
680 for (i = 0; i < CSIS_MAX_ENTITIES; i++) {
681 if (fmd->csis[i].sd == NULL)
682 continue;
683 v4l2_device_unregister_subdev(fmd->csis[i].sd);
684 fmd->csis[i].sd = NULL;
685 }
686
687 if (fmd->fimc_is)
688 v4l2_device_unregister_subdev(&fmd->fimc_is->isp.subdev);
689
690 v4l2_info(&fmd->v4l2_dev, "Unregistered all entities\n");
691 }
692
693 /**
694 * __fimc_md_create_fimc_links - create links to all FIMC entities
695 * @fmd: fimc media device
696 * @source: the source entity to create links to all fimc entities from
697 * @sensor: sensor subdev linked to FIMC[fimc_id] entity, may be null
698 * @pad: the source entity pad index
699 * @link_mask: bitmask of the fimc devices for which link should be enabled
700 */
701 static int __fimc_md_create_fimc_sink_links(struct fimc_md *fmd,
702 struct media_entity *source,
703 struct v4l2_subdev *sensor,
704 int pad, int link_mask)
705 {
706 struct fimc_source_info *si = NULL;
707 struct media_entity *sink;
708 unsigned int flags = 0;
709 int i, ret = 0;
710
711 if (sensor) {
712 si = v4l2_get_subdev_hostdata(sensor);
713 /* Skip direct FIMC links in the logical FIMC-IS sensor path */
714 if (si && si->fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK)
715 ret = 1;
716 }
717
718 for (i = 0; !ret && i < FIMC_MAX_DEVS; i++) {
719 if (!fmd->fimc[i])
720 continue;
721 /*
722 * Some FIMC variants are not fitted with camera capture
723 * interface. Skip creating a link from sensor for those.
724 */
725 if (!fmd->fimc[i]->variant->has_cam_if)
726 continue;
727
728 flags = ((1 << i) & link_mask) ? MEDIA_LNK_FL_ENABLED : 0;
729
730 sink = &fmd->fimc[i]->vid_cap.subdev.entity;
731 ret = media_create_pad_link(source, pad, sink,
732 FIMC_SD_PAD_SINK_CAM, flags);
733 if (ret)
734 return ret;
735
736 /* Notify FIMC capture subdev entity */
737 ret = media_entity_call(sink, link_setup, &sink->pads[0],
738 &source->pads[pad], flags);
739 if (ret)
740 break;
741
742 v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]\n",
743 source->name, flags ? '=' : '-', sink->name);
744 }
745
746 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
747 if (!fmd->fimc_lite[i])
748 continue;
749
750 sink = &fmd->fimc_lite[i]->subdev.entity;
751 ret = media_create_pad_link(source, pad, sink,
752 FLITE_SD_PAD_SINK, 0);
753 if (ret)
754 return ret;
755
756 /* Notify FIMC-LITE subdev entity */
757 ret = media_entity_call(sink, link_setup, &sink->pads[0],
758 &source->pads[pad], 0);
759 if (ret)
760 break;
761
762 v4l2_info(&fmd->v4l2_dev, "created link [%s] -> [%s]\n",
763 source->name, sink->name);
764 }
765 return 0;
766 }
767
768 /* Create links from FIMC-LITE source pads to other entities */
769 static int __fimc_md_create_flite_source_links(struct fimc_md *fmd)
770 {
771 struct media_entity *source, *sink;
772 int i, ret = 0;
773
774 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
775 struct fimc_lite *fimc = fmd->fimc_lite[i];
776
777 if (fimc == NULL)
778 continue;
779
780 source = &fimc->subdev.entity;
781 sink = &fimc->ve.vdev.entity;
782 /* FIMC-LITE's subdev and video node */
783 ret = media_create_pad_link(source, FLITE_SD_PAD_SOURCE_DMA,
784 sink, 0, 0);
785 if (ret)
786 break;
787 /* Link from FIMC-LITE to IS-ISP subdev */
788 sink = &fmd->fimc_is->isp.subdev.entity;
789 ret = media_create_pad_link(source, FLITE_SD_PAD_SOURCE_ISP,
790 sink, 0, 0);
791 if (ret)
792 break;
793 }
794
795 return ret;
796 }
797
798 /* Create FIMC-IS links */
799 static int __fimc_md_create_fimc_is_links(struct fimc_md *fmd)
800 {
801 struct fimc_isp *isp = &fmd->fimc_is->isp;
802 struct media_entity *source, *sink;
803 int i, ret;
804
805 source = &isp->subdev.entity;
806
807 for (i = 0; i < FIMC_MAX_DEVS; i++) {
808 if (fmd->fimc[i] == NULL)
809 continue;
810
811 /* Link from FIMC-IS-ISP subdev to FIMC */
812 sink = &fmd->fimc[i]->vid_cap.subdev.entity;
813 ret = media_create_pad_link(source, FIMC_ISP_SD_PAD_SRC_FIFO,
814 sink, FIMC_SD_PAD_SINK_FIFO, 0);
815 if (ret)
816 return ret;
817 }
818
819 /* Link from FIMC-IS-ISP subdev to fimc-is-isp.capture video node */
820 sink = &isp->video_capture.ve.vdev.entity;
821
822 /* Skip this link if the fimc-is-isp video node driver isn't built-in */
823 if (sink->num_pads == 0)
824 return 0;
825
826 return media_create_pad_link(source, FIMC_ISP_SD_PAD_SRC_DMA,
827 sink, 0, 0);
828 }
829
830 /**
831 * fimc_md_create_links - create default links between registered entities
832 *
833 * Parallel interface sensor entities are connected directly to FIMC capture
834 * entities. The sensors using MIPI CSIS bus are connected through immutable
835 * link with CSI receiver entity specified by mux_id. Any registered CSIS
836 * entity has a link to each registered FIMC capture entity. Enabled links
837 * are created by default between each subsequent registered sensor and
838 * subsequent FIMC capture entity. The number of default active links is
839 * determined by the number of available sensors or FIMC entities,
840 * whichever is less.
841 */
842 static int fimc_md_create_links(struct fimc_md *fmd)
843 {
844 struct v4l2_subdev *csi_sensors[CSIS_MAX_ENTITIES] = { NULL };
845 struct v4l2_subdev *sensor, *csis;
846 struct fimc_source_info *pdata;
847 struct media_entity *source, *sink;
848 int i, pad, fimc_id = 0, ret = 0;
849 u32 flags, link_mask = 0;
850
851 for (i = 0; i < fmd->num_sensors; i++) {
852 if (fmd->sensor[i].subdev == NULL)
853 continue;
854
855 sensor = fmd->sensor[i].subdev;
856 pdata = v4l2_get_subdev_hostdata(sensor);
857 if (!pdata)
858 continue;
859
860 source = NULL;
861
862 switch (pdata->sensor_bus_type) {
863 case FIMC_BUS_TYPE_MIPI_CSI2:
864 if (WARN(pdata->mux_id >= CSIS_MAX_ENTITIES,
865 "Wrong CSI channel id: %d\n", pdata->mux_id))
866 return -EINVAL;
867
868 csis = fmd->csis[pdata->mux_id].sd;
869 if (WARN(csis == NULL,
870 "MIPI-CSI interface specified "
871 "but s5p-csis module is not loaded!\n"))
872 return -EINVAL;
873
874 pad = sensor->entity.num_pads - 1;
875 ret = media_create_pad_link(&sensor->entity, pad,
876 &csis->entity, CSIS_PAD_SINK,
877 MEDIA_LNK_FL_IMMUTABLE |
878 MEDIA_LNK_FL_ENABLED);
879 if (ret)
880 return ret;
881
882 v4l2_info(&fmd->v4l2_dev, "created link [%s] => [%s]\n",
883 sensor->entity.name, csis->entity.name);
884
885 source = NULL;
886 csi_sensors[pdata->mux_id] = sensor;
887 break;
888
889 case FIMC_BUS_TYPE_ITU_601...FIMC_BUS_TYPE_ITU_656:
890 source = &sensor->entity;
891 pad = 0;
892 break;
893
894 default:
895 v4l2_err(&fmd->v4l2_dev, "Wrong bus_type: %x\n",
896 pdata->sensor_bus_type);
897 return -EINVAL;
898 }
899 if (source == NULL)
900 continue;
901
902 link_mask = 1 << fimc_id++;
903 ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor,
904 pad, link_mask);
905 }
906
907 for (i = 0; i < CSIS_MAX_ENTITIES; i++) {
908 if (fmd->csis[i].sd == NULL)
909 continue;
910
911 source = &fmd->csis[i].sd->entity;
912 pad = CSIS_PAD_SOURCE;
913 sensor = csi_sensors[i];
914
915 link_mask = 1 << fimc_id++;
916 ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor,
917 pad, link_mask);
918 }
919
920 /* Create immutable links between each FIMC's subdev and video node */
921 flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED;
922 for (i = 0; i < FIMC_MAX_DEVS; i++) {
923 if (!fmd->fimc[i])
924 continue;
925
926 source = &fmd->fimc[i]->vid_cap.subdev.entity;
927 sink = &fmd->fimc[i]->vid_cap.ve.vdev.entity;
928
929 ret = media_create_pad_link(source, FIMC_SD_PAD_SOURCE,
930 sink, 0, flags);
931 if (ret)
932 break;
933 }
934
935 ret = __fimc_md_create_flite_source_links(fmd);
936 if (ret < 0)
937 return ret;
938
939 if (fmd->use_isp)
940 ret = __fimc_md_create_fimc_is_links(fmd);
941
942 return ret;
943 }
944
945 /*
946 * The peripheral sensor and CAM_BLK (PIXELASYNCMx) clocks management.
947 */
948 static void fimc_md_put_clocks(struct fimc_md *fmd)
949 {
950 int i = FIMC_MAX_CAMCLKS;
951
952 while (--i >= 0) {
953 if (IS_ERR(fmd->camclk[i].clock))
954 continue;
955 clk_put(fmd->camclk[i].clock);
956 fmd->camclk[i].clock = ERR_PTR(-EINVAL);
957 }
958
959 /* Writeback (PIXELASYNCMx) clocks */
960 for (i = 0; i < FIMC_MAX_WBCLKS; i++) {
961 if (IS_ERR(fmd->wbclk[i]))
962 continue;
963 clk_put(fmd->wbclk[i]);
964 fmd->wbclk[i] = ERR_PTR(-EINVAL);
965 }
966 }
967
968 static int fimc_md_get_clocks(struct fimc_md *fmd)
969 {
970 struct device *dev = &fmd->pdev->dev;
971 char clk_name[32];
972 struct clk *clock;
973 int i, ret = 0;
974
975 for (i = 0; i < FIMC_MAX_CAMCLKS; i++)
976 fmd->camclk[i].clock = ERR_PTR(-EINVAL);
977
978 for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
979 snprintf(clk_name, sizeof(clk_name), "sclk_cam%u", i);
980 clock = clk_get(dev, clk_name);
981
982 if (IS_ERR(clock)) {
983 dev_err(dev, "Failed to get clock: %s\n", clk_name);
984 ret = PTR_ERR(clock);
985 break;
986 }
987 fmd->camclk[i].clock = clock;
988 }
989 if (ret)
990 fimc_md_put_clocks(fmd);
991
992 if (!fmd->use_isp)
993 return 0;
994 /*
995 * For now get only PIXELASYNCM1 clock (Writeback B/ISP),
996 * leave PIXELASYNCM0 out for the LCD Writeback driver.
997 */
998 fmd->wbclk[CLK_IDX_WB_A] = ERR_PTR(-EINVAL);
999
1000 for (i = CLK_IDX_WB_B; i < FIMC_MAX_WBCLKS; i++) {
1001 snprintf(clk_name, sizeof(clk_name), "pxl_async%u", i);
1002 clock = clk_get(dev, clk_name);
1003 if (IS_ERR(clock)) {
1004 v4l2_err(&fmd->v4l2_dev, "Failed to get clock: %s\n",
1005 clk_name);
1006 ret = PTR_ERR(clock);
1007 break;
1008 }
1009 fmd->wbclk[i] = clock;
1010 }
1011 if (ret)
1012 fimc_md_put_clocks(fmd);
1013
1014 return ret;
1015 }
1016
1017 static int __fimc_md_modify_pipeline(struct media_entity *entity, bool enable)
1018 {
1019 struct exynos_video_entity *ve;
1020 struct fimc_pipeline *p;
1021 struct video_device *vdev;
1022 int ret;
1023
1024 vdev = media_entity_to_video_device(entity);
1025 if (vdev->entity.use_count == 0)
1026 return 0;
1027
1028 ve = vdev_to_exynos_video_entity(vdev);
1029 p = to_fimc_pipeline(ve->pipe);
1030 /*
1031 * Nothing to do if we are disabling the pipeline, some link
1032 * has been disconnected and p->subdevs array is cleared now.
1033 */
1034 if (!enable && p->subdevs[IDX_SENSOR] == NULL)
1035 return 0;
1036
1037 if (enable)
1038 ret = __fimc_pipeline_open(ve->pipe, entity, true);
1039 else
1040 ret = __fimc_pipeline_close(ve->pipe);
1041
1042 if (ret == 0 && !enable)
1043 memset(p->subdevs, 0, sizeof(p->subdevs));
1044
1045 return ret;
1046 }
1047
1048 /* Locking: called with entity->graph_obj.mdev->graph_mutex mutex held. */
1049 static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable)
1050 {
1051 struct media_entity *entity_err = entity;
1052 struct media_entity_graph graph;
1053 int ret;
1054
1055 /*
1056 * Walk current graph and call the pipeline open/close routine for each
1057 * opened video node that belongs to the graph of entities connected
1058 * through active links. This is needed as we cannot power on/off the
1059 * subdevs in random order.
1060 */
1061 media_entity_graph_walk_start(&graph, entity);
1062
1063 while ((entity = media_entity_graph_walk_next(&graph))) {
1064 if (!is_media_entity_v4l2_io(entity))
1065 continue;
1066
1067 ret = __fimc_md_modify_pipeline(entity, enable);
1068
1069 if (ret < 0)
1070 goto err;
1071 }
1072
1073 return 0;
1074 err:
1075 media_entity_graph_walk_start(&graph, entity_err);
1076
1077 while ((entity_err = media_entity_graph_walk_next(&graph))) {
1078 if (!is_media_entity_v4l2_io(entity_err))
1079 continue;
1080
1081 __fimc_md_modify_pipeline(entity_err, !enable);
1082
1083 if (entity_err == entity)
1084 break;
1085 }
1086
1087 return ret;
1088 }
1089
1090 static int fimc_md_link_notify(struct media_link *link, unsigned int flags,
1091 unsigned int notification)
1092 {
1093 struct media_entity *sink = link->sink->entity;
1094 int ret = 0;
1095
1096 /* Before link disconnection */
1097 if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH) {
1098 if (!(flags & MEDIA_LNK_FL_ENABLED))
1099 ret = __fimc_md_modify_pipelines(sink, false);
1100 #if 0
1101 else
1102 /* TODO: Link state change validation */
1103 #endif
1104 /* After link activation */
1105 } else if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH &&
1106 (link->flags & MEDIA_LNK_FL_ENABLED)) {
1107 ret = __fimc_md_modify_pipelines(sink, true);
1108 }
1109
1110 return ret ? -EPIPE : 0;
1111 }
1112
1113 static ssize_t fimc_md_sysfs_show(struct device *dev,
1114 struct device_attribute *attr, char *buf)
1115 {
1116 struct platform_device *pdev = to_platform_device(dev);
1117 struct fimc_md *fmd = platform_get_drvdata(pdev);
1118
1119 if (fmd->user_subdev_api)
1120 return strlcpy(buf, "Sub-device API (sub-dev)\n", PAGE_SIZE);
1121
1122 return strlcpy(buf, "V4L2 video node only API (vid-dev)\n", PAGE_SIZE);
1123 }
1124
1125 static ssize_t fimc_md_sysfs_store(struct device *dev,
1126 struct device_attribute *attr,
1127 const char *buf, size_t count)
1128 {
1129 struct platform_device *pdev = to_platform_device(dev);
1130 struct fimc_md *fmd = platform_get_drvdata(pdev);
1131 bool subdev_api;
1132 int i;
1133
1134 if (!strcmp(buf, "vid-dev\n"))
1135 subdev_api = false;
1136 else if (!strcmp(buf, "sub-dev\n"))
1137 subdev_api = true;
1138 else
1139 return count;
1140
1141 fmd->user_subdev_api = subdev_api;
1142 for (i = 0; i < FIMC_MAX_DEVS; i++)
1143 if (fmd->fimc[i])
1144 fmd->fimc[i]->vid_cap.user_subdev_api = subdev_api;
1145 return count;
1146 }
1147 /*
1148 * This device attribute is to select video pipeline configuration method.
1149 * There are following valid values:
1150 * vid-dev - for V4L2 video node API only, subdevice will be configured
1151 * by the host driver.
1152 * sub-dev - for media controller API, subdevs must be configured in user
1153 * space before starting streaming.
1154 */
1155 static DEVICE_ATTR(subdev_conf_mode, S_IWUSR | S_IRUGO,
1156 fimc_md_sysfs_show, fimc_md_sysfs_store);
1157
1158 static int fimc_md_get_pinctrl(struct fimc_md *fmd)
1159 {
1160 struct device *dev = &fmd->pdev->dev;
1161 struct fimc_pinctrl *pctl = &fmd->pinctl;
1162
1163 pctl->pinctrl = devm_pinctrl_get(dev);
1164 if (IS_ERR(pctl->pinctrl))
1165 return PTR_ERR(pctl->pinctrl);
1166
1167 pctl->state_default = pinctrl_lookup_state(pctl->pinctrl,
1168 PINCTRL_STATE_DEFAULT);
1169 if (IS_ERR(pctl->state_default))
1170 return PTR_ERR(pctl->state_default);
1171
1172 pctl->state_idle = pinctrl_lookup_state(pctl->pinctrl,
1173 PINCTRL_STATE_IDLE);
1174 return 0;
1175 }
1176
1177 static int cam_clk_prepare(struct clk_hw *hw)
1178 {
1179 struct cam_clk *camclk = to_cam_clk(hw);
1180 int ret;
1181
1182 if (camclk->fmd->pmf == NULL)
1183 return -ENODEV;
1184
1185 ret = pm_runtime_get_sync(camclk->fmd->pmf);
1186 return ret < 0 ? ret : 0;
1187 }
1188
1189 static void cam_clk_unprepare(struct clk_hw *hw)
1190 {
1191 struct cam_clk *camclk = to_cam_clk(hw);
1192
1193 if (camclk->fmd->pmf == NULL)
1194 return;
1195
1196 pm_runtime_put_sync(camclk->fmd->pmf);
1197 }
1198
1199 static const struct clk_ops cam_clk_ops = {
1200 .prepare = cam_clk_prepare,
1201 .unprepare = cam_clk_unprepare,
1202 };
1203
1204 static void fimc_md_unregister_clk_provider(struct fimc_md *fmd)
1205 {
1206 struct cam_clk_provider *cp = &fmd->clk_provider;
1207 unsigned int i;
1208
1209 if (cp->of_node)
1210 of_clk_del_provider(cp->of_node);
1211
1212 for (i = 0; i < cp->num_clocks; i++)
1213 clk_unregister(cp->clks[i]);
1214 }
1215
1216 static int fimc_md_register_clk_provider(struct fimc_md *fmd)
1217 {
1218 struct cam_clk_provider *cp = &fmd->clk_provider;
1219 struct device *dev = &fmd->pdev->dev;
1220 int i, ret;
1221
1222 for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
1223 struct cam_clk *camclk = &cp->camclk[i];
1224 struct clk_init_data init;
1225 const char *p_name;
1226
1227 ret = of_property_read_string_index(dev->of_node,
1228 "clock-output-names", i, &init.name);
1229 if (ret < 0)
1230 break;
1231
1232 p_name = __clk_get_name(fmd->camclk[i].clock);
1233
1234 /* It's safe since clk_register() will duplicate the string. */
1235 init.parent_names = &p_name;
1236 init.num_parents = 1;
1237 init.ops = &cam_clk_ops;
1238 init.flags = CLK_SET_RATE_PARENT;
1239 camclk->hw.init = &init;
1240 camclk->fmd = fmd;
1241
1242 cp->clks[i] = clk_register(NULL, &camclk->hw);
1243 if (IS_ERR(cp->clks[i])) {
1244 dev_err(dev, "failed to register clock: %s (%ld)\n",
1245 init.name, PTR_ERR(cp->clks[i]));
1246 ret = PTR_ERR(cp->clks[i]);
1247 goto err;
1248 }
1249 cp->num_clocks++;
1250 }
1251
1252 if (cp->num_clocks == 0) {
1253 dev_warn(dev, "clk provider not registered\n");
1254 return 0;
1255 }
1256
1257 cp->clk_data.clks = cp->clks;
1258 cp->clk_data.clk_num = cp->num_clocks;
1259 cp->of_node = dev->of_node;
1260 ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get,
1261 &cp->clk_data);
1262 if (ret == 0)
1263 return 0;
1264 err:
1265 fimc_md_unregister_clk_provider(fmd);
1266 return ret;
1267 }
1268
1269 static int subdev_notifier_bound(struct v4l2_async_notifier *notifier,
1270 struct v4l2_subdev *subdev,
1271 struct v4l2_async_subdev *asd)
1272 {
1273 struct fimc_md *fmd = notifier_to_fimc_md(notifier);
1274 struct fimc_sensor_info *si = NULL;
1275 int i;
1276
1277 /* Find platform data for this sensor subdev */
1278 for (i = 0; i < ARRAY_SIZE(fmd->sensor); i++)
1279 if (fmd->sensor[i].asd.match.of.node == subdev->dev->of_node)
1280 si = &fmd->sensor[i];
1281
1282 if (si == NULL)
1283 return -EINVAL;
1284
1285 v4l2_set_subdev_hostdata(subdev, &si->pdata);
1286
1287 if (si->pdata.fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK)
1288 subdev->grp_id = GRP_ID_FIMC_IS_SENSOR;
1289 else
1290 subdev->grp_id = GRP_ID_SENSOR;
1291
1292 si->subdev = subdev;
1293
1294 v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice: %s (%d)\n",
1295 subdev->name, fmd->num_sensors);
1296
1297 fmd->num_sensors++;
1298
1299 return 0;
1300 }
1301
1302 static int subdev_notifier_complete(struct v4l2_async_notifier *notifier)
1303 {
1304 struct fimc_md *fmd = notifier_to_fimc_md(notifier);
1305 int ret;
1306
1307 mutex_lock(&fmd->media_dev.graph_mutex);
1308
1309 ret = fimc_md_create_links(fmd);
1310 if (ret < 0)
1311 goto unlock;
1312
1313 ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev);
1314 unlock:
1315 mutex_unlock(&fmd->media_dev.graph_mutex);
1316 if (ret < 0)
1317 return ret;
1318
1319 return media_device_register(&fmd->media_dev);
1320 }
1321
1322 static int fimc_md_probe(struct platform_device *pdev)
1323 {
1324 struct device *dev = &pdev->dev;
1325 struct v4l2_device *v4l2_dev;
1326 struct fimc_md *fmd;
1327 int ret;
1328
1329 fmd = devm_kzalloc(dev, sizeof(*fmd), GFP_KERNEL);
1330 if (!fmd)
1331 return -ENOMEM;
1332
1333 spin_lock_init(&fmd->slock);
1334 INIT_LIST_HEAD(&fmd->pipelines);
1335 fmd->pdev = pdev;
1336
1337 strlcpy(fmd->media_dev.model, "SAMSUNG S5P FIMC",
1338 sizeof(fmd->media_dev.model));
1339 fmd->media_dev.link_notify = fimc_md_link_notify;
1340 fmd->media_dev.dev = dev;
1341
1342 v4l2_dev = &fmd->v4l2_dev;
1343 v4l2_dev->mdev = &fmd->media_dev;
1344 v4l2_dev->notify = fimc_sensor_notify;
1345 strlcpy(v4l2_dev->name, "s5p-fimc-md", sizeof(v4l2_dev->name));
1346
1347 fmd->use_isp = fimc_md_is_isp_available(dev->of_node);
1348 fmd->user_subdev_api = true;
1349
1350 ret = v4l2_device_register(dev, &fmd->v4l2_dev);
1351 if (ret < 0) {
1352 v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret);
1353 return ret;
1354 }
1355
1356 media_device_init(&fmd->media_dev);
1357
1358 ret = fimc_md_get_clocks(fmd);
1359 if (ret)
1360 goto err_md;
1361
1362 ret = fimc_md_get_pinctrl(fmd);
1363 if (ret < 0) {
1364 if (ret != EPROBE_DEFER)
1365 dev_err(dev, "Failed to get pinctrl: %d\n", ret);
1366 goto err_clk;
1367 }
1368
1369 platform_set_drvdata(pdev, fmd);
1370
1371 /* Protect the media graph while we're registering entities */
1372 mutex_lock(&fmd->media_dev.graph_mutex);
1373
1374 ret = fimc_md_register_platform_entities(fmd, dev->of_node);
1375 if (ret) {
1376 mutex_unlock(&fmd->media_dev.graph_mutex);
1377 goto err_clk;
1378 }
1379
1380 ret = fimc_md_register_sensor_entities(fmd);
1381 if (ret) {
1382 mutex_unlock(&fmd->media_dev.graph_mutex);
1383 goto err_m_ent;
1384 }
1385
1386 mutex_unlock(&fmd->media_dev.graph_mutex);
1387
1388 ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1389 if (ret)
1390 goto err_m_ent;
1391 /*
1392 * FIMC platform devices need to be registered before the sclk_cam
1393 * clocks provider, as one of these devices needs to be activated
1394 * to enable the clock.
1395 */
1396 ret = fimc_md_register_clk_provider(fmd);
1397 if (ret < 0) {
1398 v4l2_err(v4l2_dev, "clock provider registration failed\n");
1399 goto err_attr;
1400 }
1401
1402 if (fmd->num_sensors > 0) {
1403 fmd->subdev_notifier.subdevs = fmd->async_subdevs;
1404 fmd->subdev_notifier.num_subdevs = fmd->num_sensors;
1405 fmd->subdev_notifier.bound = subdev_notifier_bound;
1406 fmd->subdev_notifier.complete = subdev_notifier_complete;
1407 fmd->num_sensors = 0;
1408
1409 ret = v4l2_async_notifier_register(&fmd->v4l2_dev,
1410 &fmd->subdev_notifier);
1411 if (ret)
1412 goto err_clk_p;
1413 }
1414
1415 return 0;
1416
1417 err_clk_p:
1418 fimc_md_unregister_clk_provider(fmd);
1419 err_attr:
1420 device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1421 err_clk:
1422 fimc_md_put_clocks(fmd);
1423 err_m_ent:
1424 fimc_md_unregister_entities(fmd);
1425 err_md:
1426 media_device_cleanup(&fmd->media_dev);
1427 v4l2_device_unregister(&fmd->v4l2_dev);
1428 return ret;
1429 }
1430
1431 static int fimc_md_remove(struct platform_device *pdev)
1432 {
1433 struct fimc_md *fmd = platform_get_drvdata(pdev);
1434
1435 if (!fmd)
1436 return 0;
1437
1438 fimc_md_unregister_clk_provider(fmd);
1439 v4l2_async_notifier_unregister(&fmd->subdev_notifier);
1440
1441 v4l2_device_unregister(&fmd->v4l2_dev);
1442 device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1443 fimc_md_unregister_entities(fmd);
1444 fimc_md_pipelines_free(fmd);
1445 media_device_unregister(&fmd->media_dev);
1446 media_device_cleanup(&fmd->media_dev);
1447 fimc_md_put_clocks(fmd);
1448
1449 return 0;
1450 }
1451
1452 static const struct platform_device_id fimc_driver_ids[] __always_unused = {
1453 { .name = "s5p-fimc-md" },
1454 { },
1455 };
1456 MODULE_DEVICE_TABLE(platform, fimc_driver_ids);
1457
1458 static const struct of_device_id fimc_md_of_match[] = {
1459 { .compatible = "samsung,fimc" },
1460 { },
1461 };
1462 MODULE_DEVICE_TABLE(of, fimc_md_of_match);
1463
1464 static struct platform_driver fimc_md_driver = {
1465 .probe = fimc_md_probe,
1466 .remove = fimc_md_remove,
1467 .driver = {
1468 .of_match_table = of_match_ptr(fimc_md_of_match),
1469 .name = "s5p-fimc-md",
1470 }
1471 };
1472
1473 static int __init fimc_md_init(void)
1474 {
1475 int ret;
1476
1477 request_module("s5p-csis");
1478 ret = fimc_register_driver();
1479 if (ret)
1480 return ret;
1481
1482 return platform_driver_register(&fimc_md_driver);
1483 }
1484
1485 static void __exit fimc_md_exit(void)
1486 {
1487 platform_driver_unregister(&fimc_md_driver);
1488 fimc_unregister_driver();
1489 }
1490
1491 module_init(fimc_md_init);
1492 module_exit(fimc_md_exit);
1493
1494 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
1495 MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver");
1496 MODULE_LICENSE("GPL");
1497 MODULE_VERSION("2.0.1");
Linux kernel - Deliverables
This page took 0.082778 seconds and 5 git commands to generate.