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[media] of: move common endpoint parsing to drivers/of
[linux-2.6/btrfs-unstable.git] / drivers / media / platform / exynos4-is / media-dev.c
blob04d6ecdd314cb10014c696ec296e329b291e0ea3
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/device.h>
15 #include <linux/errno.h>
16 #include <linux/i2c.h>
17 #include <linux/kernel.h>
18 #include <linux/list.h>
19 #include <linux/module.h>
20 #include <linux/of.h>
21 #include <linux/of_platform.h>
22 #include <linux/of_device.h>
23 #include <linux/of_graph.h>
24 #include <linux/platform_device.h>
25 #include <linux/pm_runtime.h>
26 #include <linux/types.h>
27 #include <linux/slab.h>
28 #include <media/v4l2-ctrls.h>
29 #include <media/v4l2-of.h>
30 #include <media/media-device.h>
31 #include <media/s5p_fimc.h>
32
33 #include "media-dev.h"
34 #include "fimc-core.h"
35 #include "fimc-is.h"
36 #include "fimc-lite.h"
37 #include "mipi-csis.h"
38
39 static int __fimc_md_set_camclk(struct fimc_md *fmd,
40 struct fimc_source_info *si,
41 bool on);
42
43 /* Set up image sensor subdev -> FIMC capture node notifications. */
44 static void __setup_sensor_notification(struct fimc_md *fmd,
45 struct v4l2_subdev *sensor,
46 struct v4l2_subdev *fimc_sd)
47 {
48 struct fimc_source_info *src_inf;
49 struct fimc_sensor_info *md_si;
50 unsigned long flags;
51
52 src_inf = v4l2_get_subdev_hostdata(sensor);
53 if (!src_inf || WARN_ON(fmd == NULL))
54 return;
55
56 md_si = source_to_sensor_info(src_inf);
57 spin_lock_irqsave(&fmd->slock, flags);
58 md_si->host = v4l2_get_subdevdata(fimc_sd);
59 spin_unlock_irqrestore(&fmd->slock, flags);
60 }
61
62 /**
63 * fimc_pipeline_prepare - update pipeline information with subdevice pointers
64 * @me: media entity terminating the pipeline
65 *
66 * Caller holds the graph mutex.
67 */
68 static void fimc_pipeline_prepare(struct fimc_pipeline *p,
69 struct media_entity *me)
70 {
71 struct fimc_md *fmd = entity_to_fimc_mdev(me);
72 struct v4l2_subdev *sd;
73 struct v4l2_subdev *sensor = NULL;
74 int i;
75
76 for (i = 0; i < IDX_MAX; i++)
77 p->subdevs[i] = NULL;
78
79 while (1) {
80 struct media_pad *pad = NULL;
81
82 /* Find remote source pad */
83 for (i = 0; i < me->num_pads; i++) {
84 struct media_pad *spad = &me->pads[i];
85 if (!(spad->flags & MEDIA_PAD_FL_SINK))
86 continue;
87 pad = media_entity_remote_pad(spad);
88 if (pad)
89 break;
90 }
91
92 if (pad == NULL ||
93 media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
94 break;
95 sd = media_entity_to_v4l2_subdev(pad->entity);
96
97 switch (sd->grp_id) {
98 case GRP_ID_SENSOR:
99 sensor = sd;
100 /* fall through */
101 case GRP_ID_FIMC_IS_SENSOR:
102 p->subdevs[IDX_SENSOR] = sd;
103 break;
104 case GRP_ID_CSIS:
105 p->subdevs[IDX_CSIS] = sd;
106 break;
107 case GRP_ID_FLITE:
108 p->subdevs[IDX_FLITE] = sd;
109 break;
110 case GRP_ID_FIMC:
111 p->subdevs[IDX_FIMC] = sd;
112 break;
113 case GRP_ID_FIMC_IS:
114 p->subdevs[IDX_IS_ISP] = sd;
115 break;
116 default:
117 break;
118 }
119 me = &sd->entity;
120 if (me->num_pads == 1)
121 break;
122 }
123
124 if (sensor && p->subdevs[IDX_FIMC])
125 __setup_sensor_notification(fmd, sensor, p->subdevs[IDX_FIMC]);
126 }
127
128 /**
129 * __subdev_set_power - change power state of a single subdev
130 * @sd: subdevice to change power state for
131 * @on: 1 to enable power or 0 to disable
132 *
133 * Return result of s_power subdev operation or -ENXIO if sd argument
134 * is NULL. Return 0 if the subdevice does not implement s_power.
135 */
136 static int __subdev_set_power(struct v4l2_subdev *sd, int on)
137 {
138 int *use_count;
139 int ret;
140
141 if (sd == NULL)
142 return -ENXIO;
143
144 use_count = &sd->entity.use_count;
145 if (on && (*use_count)++ > 0)
146 return 0;
147 else if (!on && (*use_count == 0 || --(*use_count) > 0))
148 return 0;
149 ret = v4l2_subdev_call(sd, core, s_power, on);
150
151 return ret != -ENOIOCTLCMD ? ret : 0;
152 }
153
154 /**
155 * fimc_pipeline_s_power - change power state of all pipeline subdevs
156 * @fimc: fimc device terminating the pipeline
157 * @state: true to power on, false to power off
158 *
159 * Needs to be called with the graph mutex held.
160 */
161 static int fimc_pipeline_s_power(struct fimc_pipeline *p, bool on)
162 {
163 static const u8 seq[2][IDX_MAX - 1] = {
164 { IDX_IS_ISP, IDX_SENSOR, IDX_CSIS, IDX_FLITE },
165 { IDX_CSIS, IDX_FLITE, IDX_SENSOR, IDX_IS_ISP },
166 };
167 int i, ret = 0;
168
169 if (p->subdevs[IDX_SENSOR] == NULL)
170 return -ENXIO;
171
172 for (i = 0; i < IDX_MAX - 1; i++) {
173 unsigned int idx = seq[on][i];
174
175 ret = __subdev_set_power(p->subdevs[idx], on);
176
177
178 if (ret < 0 && ret != -ENXIO)
179 goto error;
180 }
181 return 0;
182 error:
183 for (; i >= 0; i--) {
184 unsigned int idx = seq[on][i];
185 __subdev_set_power(p->subdevs[idx], !on);
186 }
187 return ret;
188 }
189
190 /**
191 * __fimc_pipeline_open - update the pipeline information, enable power
192 * of all pipeline subdevs and the sensor clock
193 * @me: media entity to start graph walk with
194 * @prepare: true to walk the current pipeline and acquire all subdevs
195 *
196 * Called with the graph mutex held.
197 */
198 static int __fimc_pipeline_open(struct exynos_media_pipeline *ep,
199 struct media_entity *me, bool prepare)
200 {
201 struct fimc_md *fmd = entity_to_fimc_mdev(me);
202 struct fimc_pipeline *p = to_fimc_pipeline(ep);
203 struct v4l2_subdev *sd;
204 int ret;
205
206 if (WARN_ON(p == NULL || me == NULL))
207 return -EINVAL;
208
209 if (prepare)
210 fimc_pipeline_prepare(p, me);
211
212 sd = p->subdevs[IDX_SENSOR];
213 if (sd == NULL)
214 return -EINVAL;
215
216 /* Disable PXLASYNC clock if this pipeline includes FIMC-IS */
217 if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP]) {
218 ret = clk_prepare_enable(fmd->wbclk[CLK_IDX_WB_B]);
219 if (ret < 0)
220 return ret;
221 }
222 ret = fimc_md_set_camclk(sd, true);
223 if (ret < 0)
224 goto err_wbclk;
225
226 ret = fimc_pipeline_s_power(p, 1);
227 if (!ret)
228 return 0;
229
230 fimc_md_set_camclk(sd, false);
231
232 err_wbclk:
233 if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP])
234 clk_disable_unprepare(fmd->wbclk[CLK_IDX_WB_B]);
235
236 return ret;
237 }
238
239 /**
240 * __fimc_pipeline_close - disable the sensor clock and pipeline power
241 * @fimc: fimc device terminating the pipeline
242 *
243 * Disable power of all subdevs and turn the external sensor clock off.
244 */
245 static int __fimc_pipeline_close(struct exynos_media_pipeline *ep)
246 {
247 struct fimc_pipeline *p = to_fimc_pipeline(ep);
248 struct v4l2_subdev *sd = p ? p->subdevs[IDX_SENSOR] : NULL;
249 struct fimc_md *fmd;
250 int ret;
251
252 if (sd == NULL) {
253 pr_warn("%s(): No sensor subdev\n", __func__);
254 return 0;
255 }
256
257 ret = fimc_pipeline_s_power(p, 0);
258 fimc_md_set_camclk(sd, false);
259
260 fmd = entity_to_fimc_mdev(&sd->entity);
261
262 /* Disable PXLASYNC clock if this pipeline includes FIMC-IS */
263 if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP])
264 clk_disable_unprepare(fmd->wbclk[CLK_IDX_WB_B]);
265
266 return ret == -ENXIO ? 0 : ret;
267 }
268
269 /**
270 * __fimc_pipeline_s_stream - call s_stream() on pipeline subdevs
271 * @pipeline: video pipeline structure
272 * @on: passed as the s_stream() callback argument
273 */
274 static int __fimc_pipeline_s_stream(struct exynos_media_pipeline *ep, bool on)
275 {
276 static const u8 seq[2][IDX_MAX] = {
277 { IDX_FIMC, IDX_SENSOR, IDX_IS_ISP, IDX_CSIS, IDX_FLITE },
278 { IDX_CSIS, IDX_FLITE, IDX_FIMC, IDX_SENSOR, IDX_IS_ISP },
279 };
280 struct fimc_pipeline *p = to_fimc_pipeline(ep);
281 int i, ret = 0;
282
283 if (p->subdevs[IDX_SENSOR] == NULL)
284 return -ENODEV;
285
286 for (i = 0; i < IDX_MAX; i++) {
287 unsigned int idx = seq[on][i];
288
289 ret = v4l2_subdev_call(p->subdevs[idx], video, s_stream, on);
290
291 if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
292 goto error;
293 }
294 return 0;
295 error:
296 for (; i >= 0; i--) {
297 unsigned int idx = seq[on][i];
298 v4l2_subdev_call(p->subdevs[idx], video, s_stream, !on);
299 }
300 return ret;
301 }
302
303 /* Media pipeline operations for the FIMC/FIMC-LITE video device driver */
304 static const struct exynos_media_pipeline_ops fimc_pipeline_ops = {
305 .open = __fimc_pipeline_open,
306 .close = __fimc_pipeline_close,
307 .set_stream = __fimc_pipeline_s_stream,
308 };
309
310 static struct exynos_media_pipeline *fimc_md_pipeline_create(
311 struct fimc_md *fmd)
312 {
313 struct fimc_pipeline *p;
314
315 p = kzalloc(sizeof(*p), GFP_KERNEL);
316 if (!p)
317 return NULL;
318
319 list_add_tail(&p->list, &fmd->pipelines);
320
321 p->ep.ops = &fimc_pipeline_ops;
322 return &p->ep;
323 }
324
325 static void fimc_md_pipelines_free(struct fimc_md *fmd)
326 {
327 while (!list_empty(&fmd->pipelines)) {
328 struct fimc_pipeline *p;
329
330 p = list_entry(fmd->pipelines.next, typeof(*p), list);
331 list_del(&p->list);
332 kfree(p);
333 }
334 }
335
336 /*
337 * Sensor subdevice helper functions
338 */
339 static struct v4l2_subdev *fimc_md_register_sensor(struct fimc_md *fmd,
340 struct fimc_source_info *si)
341 {
342 struct i2c_adapter *adapter;
343 struct v4l2_subdev *sd = NULL;
344
345 if (!si || !fmd)
346 return NULL;
347 /*
348 * If FIMC bus type is not Writeback FIFO assume it is same
349 * as sensor_bus_type.
350 */
351 si->fimc_bus_type = si->sensor_bus_type;
352
353 adapter = i2c_get_adapter(si->i2c_bus_num);
354 if (!adapter) {
355 v4l2_warn(&fmd->v4l2_dev,
356 "Failed to get I2C adapter %d, deferring probe\n",
357 si->i2c_bus_num);
358 return ERR_PTR(-EPROBE_DEFER);
359 }
360 sd = v4l2_i2c_new_subdev_board(&fmd->v4l2_dev, adapter,
361 si->board_info, NULL);
362 if (IS_ERR_OR_NULL(sd)) {
363 i2c_put_adapter(adapter);
364 v4l2_warn(&fmd->v4l2_dev,
365 "Failed to acquire subdev %s, deferring probe\n",
366 si->board_info->type);
367 return ERR_PTR(-EPROBE_DEFER);
368 }
369 v4l2_set_subdev_hostdata(sd, si);
370 sd->grp_id = GRP_ID_SENSOR;
371
372 v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice %s\n",
373 sd->name);
374 return sd;
375 }
376
377 static void fimc_md_unregister_sensor(struct v4l2_subdev *sd)
378 {
379 struct i2c_client *client = v4l2_get_subdevdata(sd);
380 struct i2c_adapter *adapter;
381
382 if (!client)
383 return;
384
385 v4l2_device_unregister_subdev(sd);
386
387 if (!client->dev.of_node) {
388 adapter = client->adapter;
389 i2c_unregister_device(client);
390 if (adapter)
391 i2c_put_adapter(adapter);
392 }
393 }
394
395 #ifdef CONFIG_OF
396 /* Register I2C client subdev associated with @node. */
397 static int fimc_md_of_add_sensor(struct fimc_md *fmd,
398 struct device_node *node, int index)
399 {
400 struct fimc_sensor_info *si;
401 struct i2c_client *client;
402 struct v4l2_subdev *sd;
403 int ret;
404
405 if (WARN_ON(index >= ARRAY_SIZE(fmd->sensor)))
406 return -EINVAL;
407 si = &fmd->sensor[index];
408
409 client = of_find_i2c_device_by_node(node);
410 if (!client)
411 return -EPROBE_DEFER;
412
413 device_lock(&client->dev);
414
415 if (!client->dev.driver ||
416 !try_module_get(client->dev.driver->owner)) {
417 ret = -EPROBE_DEFER;
418 v4l2_info(&fmd->v4l2_dev, "No driver found for %s\n",
419 node->full_name);
420 goto dev_put;
421 }
422
423 /* Enable sensor's master clock */
424 ret = __fimc_md_set_camclk(fmd, &si->pdata, true);
425 if (ret < 0)
426 goto mod_put;
427 sd = i2c_get_clientdata(client);
428
429 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
430 __fimc_md_set_camclk(fmd, &si->pdata, false);
431 if (ret < 0)
432 goto mod_put;
433
434 v4l2_set_subdev_hostdata(sd, &si->pdata);
435 if (si->pdata.fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK)
436 sd->grp_id = GRP_ID_FIMC_IS_SENSOR;
437 else
438 sd->grp_id = GRP_ID_SENSOR;
439
440 si->subdev = sd;
441 v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice: %s (%d)\n",
442 sd->name, fmd->num_sensors);
443 fmd->num_sensors++;
444
445 mod_put:
446 module_put(client->dev.driver->owner);
447 dev_put:
448 device_unlock(&client->dev);
449 put_device(&client->dev);
450 return ret;
451 }
452
453 /* Parse port node and register as a sub-device any sensor specified there. */
454 static int fimc_md_parse_port_node(struct fimc_md *fmd,
455 struct device_node *port,
456 unsigned int index)
457 {
458 struct device_node *rem, *ep, *np;
459 struct fimc_source_info *pd;
460 struct v4l2_of_endpoint endpoint;
461 int ret;
462 u32 val;
463
464 pd = &fmd->sensor[index].pdata;
465
466 /* Assume here a port node can have only one endpoint node. */
467 ep = of_get_next_child(port, NULL);
468 if (!ep)
469 return 0;
470
471 v4l2_of_parse_endpoint(ep, &endpoint);
472 if (WARN_ON(endpoint.base.port == 0) || index >= FIMC_MAX_SENSORS)
473 return -EINVAL;
474
475 pd->mux_id = (endpoint.base.port - 1) & 0x1;
476
477 rem = of_graph_get_remote_port_parent(ep);
478 of_node_put(ep);
479 if (rem == NULL) {
480 v4l2_info(&fmd->v4l2_dev, "Remote device at %s not found\n",
481 ep->full_name);
482 return 0;
483 }
484 if (!of_property_read_u32(rem, "samsung,camclk-out", &val))
485 pd->clk_id = val;
486
487 if (!of_property_read_u32(rem, "clock-frequency", &val))
488 pd->clk_frequency = val;
489
490 if (pd->clk_frequency == 0) {
491 v4l2_err(&fmd->v4l2_dev, "Wrong clock frequency at node %s\n",
492 rem->full_name);
493 of_node_put(rem);
494 return -EINVAL;
495 }
496
497 if (fimc_input_is_parallel(endpoint.base.port)) {
498 if (endpoint.bus_type == V4L2_MBUS_PARALLEL)
499 pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_601;
500 else
501 pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_656;
502 pd->flags = endpoint.bus.parallel.flags;
503 } else if (fimc_input_is_mipi_csi(endpoint.base.port)) {
504 /*
505 * MIPI CSI-2: only input mux selection and
506 * the sensor's clock frequency is needed.
507 */
508 pd->sensor_bus_type = FIMC_BUS_TYPE_MIPI_CSI2;
509 } else {
510 v4l2_err(&fmd->v4l2_dev, "Wrong port id (%u) at node %s\n",
511 endpoint.base.port, rem->full_name);
512 }
513 /*
514 * For FIMC-IS handled sensors, that are placed under i2c-isp device
515 * node, FIMC is connected to the FIMC-IS through its ISP Writeback
516 * input. Sensors are attached to the FIMC-LITE hostdata interface
517 * directly or through MIPI-CSIS, depending on the external media bus
518 * used. This needs to be handled in a more reliable way, not by just
519 * checking parent's node name.
520 */
521 np = of_get_parent(rem);
522
523 if (np && !of_node_cmp(np->name, "i2c-isp"))
524 pd->fimc_bus_type = FIMC_BUS_TYPE_ISP_WRITEBACK;
525 else
526 pd->fimc_bus_type = pd->sensor_bus_type;
527
528 ret = fimc_md_of_add_sensor(fmd, rem, index);
529 of_node_put(rem);
530
531 return ret;
532 }
533
534 /* Register all SoC external sub-devices */
535 static int fimc_md_of_sensors_register(struct fimc_md *fmd,
536 struct device_node *np)
537 {
538 struct device_node *parent = fmd->pdev->dev.of_node;
539 struct device_node *node, *ports;
540 int index = 0;
541 int ret;
542
543 /* Attach sensors linked to MIPI CSI-2 receivers */
544 for_each_available_child_of_node(parent, node) {
545 struct device_node *port;
546
547 if (of_node_cmp(node->name, "csis"))
548 continue;
549 /* The csis node can have only port subnode. */
550 port = of_get_next_child(node, NULL);
551 if (!port)
552 continue;
553
554 ret = fimc_md_parse_port_node(fmd, port, index);
555 if (ret < 0)
556 return ret;
557 index++;
558 }
559
560 /* Attach sensors listed in the parallel-ports node */
561 ports = of_get_child_by_name(parent, "parallel-ports");
562 if (!ports)
563 return 0;
564
565 for_each_child_of_node(ports, node) {
566 ret = fimc_md_parse_port_node(fmd, node, index);
567 if (ret < 0)
568 break;
569 index++;
570 }
571
572 return 0;
573 }
574
575 static int __of_get_csis_id(struct device_node *np)
576 {
577 u32 reg = 0;
578
579 np = of_get_child_by_name(np, "port");
580 if (!np)
581 return -EINVAL;
582 of_property_read_u32(np, "reg", &reg);
583 return reg - FIMC_INPUT_MIPI_CSI2_0;
584 }
585 #else
586 #define fimc_md_of_sensors_register(fmd, np) (-ENOSYS)
587 #define __of_get_csis_id(np) (-ENOSYS)
588 #endif
589
590 static int fimc_md_register_sensor_entities(struct fimc_md *fmd)
591 {
592 struct s5p_platform_fimc *pdata = fmd->pdev->dev.platform_data;
593 struct device_node *of_node = fmd->pdev->dev.of_node;
594 int num_clients = 0;
595 int ret, i;
596
597 /*
598 * Runtime resume one of the FIMC entities to make sure
599 * the sclk_cam clocks are not globally disabled.
600 */
601 if (!fmd->pmf)
602 return -ENXIO;
603
604 ret = pm_runtime_get_sync(fmd->pmf);
605 if (ret < 0)
606 return ret;
607
608 if (of_node) {
609 fmd->num_sensors = 0;
610 ret = fimc_md_of_sensors_register(fmd, of_node);
611 } else if (pdata) {
612 WARN_ON(pdata->num_clients > ARRAY_SIZE(fmd->sensor));
613 num_clients = min_t(u32, pdata->num_clients,
614 ARRAY_SIZE(fmd->sensor));
615 fmd->num_sensors = num_clients;
616
617 for (i = 0; i < num_clients; i++) {
618 struct fimc_sensor_info *si = &fmd->sensor[i];
619 struct v4l2_subdev *sd;
620
621 si->pdata = pdata->source_info[i];
622 ret = __fimc_md_set_camclk(fmd, &si->pdata, true);
623 if (ret)
624 break;
625 sd = fimc_md_register_sensor(fmd, &si->pdata);
626 ret = __fimc_md_set_camclk(fmd, &si->pdata, false);
627
628 if (IS_ERR(sd)) {
629 si->subdev = NULL;
630 ret = PTR_ERR(sd);
631 break;
632 }
633 si->subdev = sd;
634 if (ret)
635 break;
636 }
637 }
638
639 pm_runtime_put(fmd->pmf);
640 return ret;
641 }
642
643 /*
644 * MIPI-CSIS, FIMC and FIMC-LITE platform devices registration.
645 */
646
647 static int register_fimc_lite_entity(struct fimc_md *fmd,
648 struct fimc_lite *fimc_lite)
649 {
650 struct v4l2_subdev *sd;
651 struct exynos_media_pipeline *ep;
652 int ret;
653
654 if (WARN_ON(fimc_lite->index >= FIMC_LITE_MAX_DEVS ||
655 fmd->fimc_lite[fimc_lite->index]))
656 return -EBUSY;
657
658 sd = &fimc_lite->subdev;
659 sd->grp_id = GRP_ID_FLITE;
660
661 ep = fimc_md_pipeline_create(fmd);
662 if (!ep)
663 return -ENOMEM;
664
665 v4l2_set_subdev_hostdata(sd, ep);
666
667 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
668 if (!ret)
669 fmd->fimc_lite[fimc_lite->index] = fimc_lite;
670 else
671 v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.LITE%d\n",
672 fimc_lite->index);
673 return ret;
674 }
675
676 static int register_fimc_entity(struct fimc_md *fmd, struct fimc_dev *fimc)
677 {
678 struct v4l2_subdev *sd;
679 struct exynos_media_pipeline *ep;
680 int ret;
681
682 if (WARN_ON(fimc->id >= FIMC_MAX_DEVS || fmd->fimc[fimc->id]))
683 return -EBUSY;
684
685 sd = &fimc->vid_cap.subdev;
686 sd->grp_id = GRP_ID_FIMC;
687
688 ep = fimc_md_pipeline_create(fmd);
689 if (!ep)
690 return -ENOMEM;
691
692 v4l2_set_subdev_hostdata(sd, ep);
693
694 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
695 if (!ret) {
696 if (!fmd->pmf && fimc->pdev)
697 fmd->pmf = &fimc->pdev->dev;
698 fmd->fimc[fimc->id] = fimc;
699 fimc->vid_cap.user_subdev_api = fmd->user_subdev_api;
700 } else {
701 v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.%d (%d)\n",
702 fimc->id, ret);
703 }
704 return ret;
705 }
706
707 static int register_csis_entity(struct fimc_md *fmd,
708 struct platform_device *pdev,
709 struct v4l2_subdev *sd)
710 {
711 struct device_node *node = pdev->dev.of_node;
712 int id, ret;
713
714 id = node ? __of_get_csis_id(node) : max(0, pdev->id);
715
716 if (WARN_ON(id < 0 || id >= CSIS_MAX_ENTITIES))
717 return -ENOENT;
718
719 if (WARN_ON(fmd->csis[id].sd))
720 return -EBUSY;
721
722 sd->grp_id = GRP_ID_CSIS;
723 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
724 if (!ret)
725 fmd->csis[id].sd = sd;
726 else
727 v4l2_err(&fmd->v4l2_dev,
728 "Failed to register MIPI-CSIS.%d (%d)\n", id, ret);
729 return ret;
730 }
731
732 static int register_fimc_is_entity(struct fimc_md *fmd, struct fimc_is *is)
733 {
734 struct v4l2_subdev *sd = &is->isp.subdev;
735 int ret;
736
737 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
738 if (ret) {
739 v4l2_err(&fmd->v4l2_dev,
740 "Failed to register FIMC-ISP (%d)\n", ret);
741 return ret;
742 }
743
744 fmd->fimc_is = is;
745 return 0;
746 }
747
748 static int fimc_md_register_platform_entity(struct fimc_md *fmd,
749 struct platform_device *pdev,
750 int plat_entity)
751 {
752 struct device *dev = &pdev->dev;
753 int ret = -EPROBE_DEFER;
754 void *drvdata;
755
756 /* Lock to ensure dev->driver won't change. */
757 device_lock(dev);
758
759 if (!dev->driver || !try_module_get(dev->driver->owner))
760 goto dev_unlock;
761
762 drvdata = dev_get_drvdata(dev);
763 /* Some subdev didn't probe successfully id drvdata is NULL */
764 if (drvdata) {
765 switch (plat_entity) {
766 case IDX_FIMC:
767 ret = register_fimc_entity(fmd, drvdata);
768 break;
769 case IDX_FLITE:
770 ret = register_fimc_lite_entity(fmd, drvdata);
771 break;
772 case IDX_CSIS:
773 ret = register_csis_entity(fmd, pdev, drvdata);
774 break;
775 case IDX_IS_ISP:
776 ret = register_fimc_is_entity(fmd, drvdata);
777 break;
778 default:
779 ret = -ENODEV;
780 }
781 }
782
783 module_put(dev->driver->owner);
784 dev_unlock:
785 device_unlock(dev);
786 if (ret == -EPROBE_DEFER)
787 dev_info(&fmd->pdev->dev, "deferring %s device registration\n",
788 dev_name(dev));
789 else if (ret < 0)
790 dev_err(&fmd->pdev->dev, "%s device registration failed (%d)\n",
791 dev_name(dev), ret);
792 return ret;
793 }
794
795 static int fimc_md_pdev_match(struct device *dev, void *data)
796 {
797 struct platform_device *pdev = to_platform_device(dev);
798 int plat_entity = -1;
799 int ret;
800 char *p;
801
802 if (!get_device(dev))
803 return -ENODEV;
804
805 if (!strcmp(pdev->name, CSIS_DRIVER_NAME)) {
806 plat_entity = IDX_CSIS;
807 } else {
808 p = strstr(pdev->name, "fimc");
809 if (p && *(p + 4) == 0)
810 plat_entity = IDX_FIMC;
811 }
812
813 if (plat_entity >= 0)
814 ret = fimc_md_register_platform_entity(data, pdev,
815 plat_entity);
816 put_device(dev);
817 return 0;
818 }
819
820 /* Register FIMC, FIMC-LITE and CSIS media entities */
821 #ifdef CONFIG_OF
822 static int fimc_md_register_of_platform_entities(struct fimc_md *fmd,
823 struct device_node *parent)
824 {
825 struct device_node *node;
826 int ret = 0;
827
828 for_each_available_child_of_node(parent, node) {
829 struct platform_device *pdev;
830 int plat_entity = -1;
831
832 pdev = of_find_device_by_node(node);
833 if (!pdev)
834 continue;
835
836 /* If driver of any entity isn't ready try all again later. */
837 if (!strcmp(node->name, CSIS_OF_NODE_NAME))
838 plat_entity = IDX_CSIS;
839 else if (!strcmp(node->name, FIMC_IS_OF_NODE_NAME))
840 plat_entity = IDX_IS_ISP;
841 else if (!strcmp(node->name, FIMC_LITE_OF_NODE_NAME))
842 plat_entity = IDX_FLITE;
843 else if (!strcmp(node->name, FIMC_OF_NODE_NAME) &&
844 !of_property_read_bool(node, "samsung,lcd-wb"))
845 plat_entity = IDX_FIMC;
846
847 if (plat_entity >= 0)
848 ret = fimc_md_register_platform_entity(fmd, pdev,
849 plat_entity);
850 put_device(&pdev->dev);
851 if (ret < 0)
852 break;
853 }
854
855 return ret;
856 }
857 #else
858 #define fimc_md_register_of_platform_entities(fmd, node) (-ENOSYS)
859 #endif
860
861 static void fimc_md_unregister_entities(struct fimc_md *fmd)
862 {
863 int i;
864
865 for (i = 0; i < FIMC_MAX_DEVS; i++) {
866 struct fimc_dev *dev = fmd->fimc[i];
867 if (dev == NULL)
868 continue;
869 v4l2_device_unregister_subdev(&dev->vid_cap.subdev);
870 dev->vid_cap.ve.pipe = NULL;
871 fmd->fimc[i] = NULL;
872 }
873 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
874 struct fimc_lite *dev = fmd->fimc_lite[i];
875 if (dev == NULL)
876 continue;
877 v4l2_device_unregister_subdev(&dev->subdev);
878 dev->ve.pipe = NULL;
879 fmd->fimc_lite[i] = NULL;
880 }
881 for (i = 0; i < CSIS_MAX_ENTITIES; i++) {
882 if (fmd->csis[i].sd == NULL)
883 continue;
884 v4l2_device_unregister_subdev(fmd->csis[i].sd);
885 fmd->csis[i].sd = NULL;
886 }
887 for (i = 0; i < fmd->num_sensors; i++) {
888 if (fmd->sensor[i].subdev == NULL)
889 continue;
890 fimc_md_unregister_sensor(fmd->sensor[i].subdev);
891 fmd->sensor[i].subdev = NULL;
892 }
893
894 if (fmd->fimc_is)
895 v4l2_device_unregister_subdev(&fmd->fimc_is->isp.subdev);
896
897 v4l2_info(&fmd->v4l2_dev, "Unregistered all entities\n");
898 }
899
900 /**
901 * __fimc_md_create_fimc_links - create links to all FIMC entities
902 * @fmd: fimc media device
903 * @source: the source entity to create links to all fimc entities from
904 * @sensor: sensor subdev linked to FIMC[fimc_id] entity, may be null
905 * @pad: the source entity pad index
906 * @link_mask: bitmask of the fimc devices for which link should be enabled
907 */
908 static int __fimc_md_create_fimc_sink_links(struct fimc_md *fmd,
909 struct media_entity *source,
910 struct v4l2_subdev *sensor,
911 int pad, int link_mask)
912 {
913 struct fimc_source_info *si = NULL;
914 struct media_entity *sink;
915 unsigned int flags = 0;
916 int i, ret = 0;
917
918 if (sensor) {
919 si = v4l2_get_subdev_hostdata(sensor);
920 /* Skip direct FIMC links in the logical FIMC-IS sensor path */
921 if (si && si->fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK)
922 ret = 1;
923 }
924
925 for (i = 0; !ret && i < FIMC_MAX_DEVS; i++) {
926 if (!fmd->fimc[i])
927 continue;
928 /*
929 * Some FIMC variants are not fitted with camera capture
930 * interface. Skip creating a link from sensor for those.
931 */
932 if (!fmd->fimc[i]->variant->has_cam_if)
933 continue;
934
935 flags = ((1 << i) & link_mask) ? MEDIA_LNK_FL_ENABLED : 0;
936
937 sink = &fmd->fimc[i]->vid_cap.subdev.entity;
938 ret = media_entity_create_link(source, pad, sink,
939 FIMC_SD_PAD_SINK_CAM, flags);
940 if (ret)
941 return ret;
942
943 /* Notify FIMC capture subdev entity */
944 ret = media_entity_call(sink, link_setup, &sink->pads[0],
945 &source->pads[pad], flags);
946 if (ret)
947 break;
948
949 v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]\n",
950 source->name, flags ? '=' : '-', sink->name);
951 }
952
953 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
954 if (!fmd->fimc_lite[i])
955 continue;
956
957 sink = &fmd->fimc_lite[i]->subdev.entity;
958 ret = media_entity_create_link(source, pad, sink,
959 FLITE_SD_PAD_SINK, 0);
960 if (ret)
961 return ret;
962
963 /* Notify FIMC-LITE subdev entity */
964 ret = media_entity_call(sink, link_setup, &sink->pads[0],
965 &source->pads[pad], 0);
966 if (ret)
967 break;
968
969 v4l2_info(&fmd->v4l2_dev, "created link [%s] -> [%s]\n",
970 source->name, sink->name);
971 }
972 return 0;
973 }
974
975 /* Create links from FIMC-LITE source pads to other entities */
976 static int __fimc_md_create_flite_source_links(struct fimc_md *fmd)
977 {
978 struct media_entity *source, *sink;
979 int i, ret = 0;
980
981 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
982 struct fimc_lite *fimc = fmd->fimc_lite[i];
983
984 if (fimc == NULL)
985 continue;
986
987 source = &fimc->subdev.entity;
988 sink = &fimc->ve.vdev.entity;
989 /* FIMC-LITE's subdev and video node */
990 ret = media_entity_create_link(source, FLITE_SD_PAD_SOURCE_DMA,
991 sink, 0, 0);
992 if (ret)
993 break;
994 /* Link from FIMC-LITE to IS-ISP subdev */
995 sink = &fmd->fimc_is->isp.subdev.entity;
996 ret = media_entity_create_link(source, FLITE_SD_PAD_SOURCE_ISP,
997 sink, 0, 0);
998 if (ret)
999 break;
1000 }
1001
1002 return ret;
1003 }
1004
1005 /* Create FIMC-IS links */
1006 static int __fimc_md_create_fimc_is_links(struct fimc_md *fmd)
1007 {
1008 struct media_entity *source, *sink;
1009 int i, ret;
1010
1011 source = &fmd->fimc_is->isp.subdev.entity;
1012
1013 for (i = 0; i < FIMC_MAX_DEVS; i++) {
1014 if (fmd->fimc[i] == NULL)
1015 continue;
1016
1017 /* Link from IS-ISP subdev to FIMC */
1018 sink = &fmd->fimc[i]->vid_cap.subdev.entity;
1019 ret = media_entity_create_link(source, FIMC_ISP_SD_PAD_SRC_FIFO,
1020 sink, FIMC_SD_PAD_SINK_FIFO, 0);
1021 if (ret)
1022 return ret;
1023 }
1024
1025 return ret;
1026 }
1027
1028 /**
1029 * fimc_md_create_links - create default links between registered entities
1030 *
1031 * Parallel interface sensor entities are connected directly to FIMC capture
1032 * entities. The sensors using MIPI CSIS bus are connected through immutable
1033 * link with CSI receiver entity specified by mux_id. Any registered CSIS
1034 * entity has a link to each registered FIMC capture entity. Enabled links
1035 * are created by default between each subsequent registered sensor and
1036 * subsequent FIMC capture entity. The number of default active links is
1037 * determined by the number of available sensors or FIMC entities,
1038 * whichever is less.
1039 */
1040 static int fimc_md_create_links(struct fimc_md *fmd)
1041 {
1042 struct v4l2_subdev *csi_sensors[CSIS_MAX_ENTITIES] = { NULL };
1043 struct v4l2_subdev *sensor, *csis;
1044 struct fimc_source_info *pdata;
1045 struct media_entity *source, *sink;
1046 int i, pad, fimc_id = 0, ret = 0;
1047 u32 flags, link_mask = 0;
1048
1049 for (i = 0; i < fmd->num_sensors; i++) {
1050 if (fmd->sensor[i].subdev == NULL)
1051 continue;
1052
1053 sensor = fmd->sensor[i].subdev;
1054 pdata = v4l2_get_subdev_hostdata(sensor);
1055 if (!pdata)
1056 continue;
1057
1058 source = NULL;
1059
1060 switch (pdata->sensor_bus_type) {
1061 case FIMC_BUS_TYPE_MIPI_CSI2:
1062 if (WARN(pdata->mux_id >= CSIS_MAX_ENTITIES,
1063 "Wrong CSI channel id: %d\n", pdata->mux_id))
1064 return -EINVAL;
1065
1066 csis = fmd->csis[pdata->mux_id].sd;
1067 if (WARN(csis == NULL,
1068 "MIPI-CSI interface specified "
1069 "but s5p-csis module is not loaded!\n"))
1070 return -EINVAL;
1071
1072 pad = sensor->entity.num_pads - 1;
1073 ret = media_entity_create_link(&sensor->entity, pad,
1074 &csis->entity, CSIS_PAD_SINK,
1075 MEDIA_LNK_FL_IMMUTABLE |
1076 MEDIA_LNK_FL_ENABLED);
1077 if (ret)
1078 return ret;
1079
1080 v4l2_info(&fmd->v4l2_dev, "created link [%s] => [%s]\n",
1081 sensor->entity.name, csis->entity.name);
1082
1083 source = NULL;
1084 csi_sensors[pdata->mux_id] = sensor;
1085 break;
1086
1087 case FIMC_BUS_TYPE_ITU_601...FIMC_BUS_TYPE_ITU_656:
1088 source = &sensor->entity;
1089 pad = 0;
1090 break;
1091
1092 default:
1093 v4l2_err(&fmd->v4l2_dev, "Wrong bus_type: %x\n",
1094 pdata->sensor_bus_type);
1095 return -EINVAL;
1096 }
1097 if (source == NULL)
1098 continue;
1099
1100 link_mask = 1 << fimc_id++;
1101 ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor,
1102 pad, link_mask);
1103 }
1104
1105 for (i = 0; i < CSIS_MAX_ENTITIES; i++) {
1106 if (fmd->csis[i].sd == NULL)
1107 continue;
1108
1109 source = &fmd->csis[i].sd->entity;
1110 pad = CSIS_PAD_SOURCE;
1111 sensor = csi_sensors[i];
1112
1113 link_mask = 1 << fimc_id++;
1114 ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor,
1115 pad, link_mask);
1116 }
1117
1118 /* Create immutable links between each FIMC's subdev and video node */
1119 flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED;
1120 for (i = 0; i < FIMC_MAX_DEVS; i++) {
1121 if (!fmd->fimc[i])
1122 continue;
1123
1124 source = &fmd->fimc[i]->vid_cap.subdev.entity;
1125 sink = &fmd->fimc[i]->vid_cap.ve.vdev.entity;
1126
1127 ret = media_entity_create_link(source, FIMC_SD_PAD_SOURCE,
1128 sink, 0, flags);
1129 if (ret)
1130 break;
1131 }
1132
1133 ret = __fimc_md_create_flite_source_links(fmd);
1134 if (ret < 0)
1135 return ret;
1136
1137 if (fmd->use_isp)
1138 ret = __fimc_md_create_fimc_is_links(fmd);
1139
1140 return ret;
1141 }
1142
1143 /*
1144 * The peripheral sensor and CAM_BLK (PIXELASYNCMx) clocks management.
1145 */
1146 static void fimc_md_put_clocks(struct fimc_md *fmd)
1147 {
1148 int i = FIMC_MAX_CAMCLKS;
1149
1150 while (--i >= 0) {
1151 if (IS_ERR(fmd->camclk[i].clock))
1152 continue;
1153 clk_put(fmd->camclk[i].clock);
1154 fmd->camclk[i].clock = ERR_PTR(-EINVAL);
1155 }
1156
1157 /* Writeback (PIXELASYNCMx) clocks */
1158 for (i = 0; i < FIMC_MAX_WBCLKS; i++) {
1159 if (IS_ERR(fmd->wbclk[i]))
1160 continue;
1161 clk_put(fmd->wbclk[i]);
1162 fmd->wbclk[i] = ERR_PTR(-EINVAL);
1163 }
1164 }
1165
1166 static int fimc_md_get_clocks(struct fimc_md *fmd)
1167 {
1168 struct device *dev = NULL;
1169 char clk_name[32];
1170 struct clk *clock;
1171 int i, ret = 0;
1172
1173 for (i = 0; i < FIMC_MAX_CAMCLKS; i++)
1174 fmd->camclk[i].clock = ERR_PTR(-EINVAL);
1175
1176 if (fmd->pdev->dev.of_node)
1177 dev = &fmd->pdev->dev;
1178
1179 for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
1180 snprintf(clk_name, sizeof(clk_name), "sclk_cam%u", i);
1181 clock = clk_get(dev, clk_name);
1182
1183 if (IS_ERR(clock)) {
1184 dev_err(&fmd->pdev->dev, "Failed to get clock: %s\n",
1185 clk_name);
1186 ret = PTR_ERR(clock);
1187 break;
1188 }
1189 fmd->camclk[i].clock = clock;
1190 }
1191 if (ret)
1192 fimc_md_put_clocks(fmd);
1193
1194 if (!fmd->use_isp)
1195 return 0;
1196 /*
1197 * For now get only PIXELASYNCM1 clock (Writeback B/ISP),
1198 * leave PIXELASYNCM0 out for the LCD Writeback driver.
1199 */
1200 fmd->wbclk[CLK_IDX_WB_A] = ERR_PTR(-EINVAL);
1201
1202 for (i = CLK_IDX_WB_B; i < FIMC_MAX_WBCLKS; i++) {
1203 snprintf(clk_name, sizeof(clk_name), "pxl_async%u", i);
1204 clock = clk_get(dev, clk_name);
1205 if (IS_ERR(clock)) {
1206 v4l2_err(&fmd->v4l2_dev, "Failed to get clock: %s\n",
1207 clk_name);
1208 ret = PTR_ERR(clock);
1209 break;
1210 }
1211 fmd->wbclk[i] = clock;
1212 }
1213 if (ret)
1214 fimc_md_put_clocks(fmd);
1215
1216 return ret;
1217 }
1218
1219 static int __fimc_md_set_camclk(struct fimc_md *fmd,
1220 struct fimc_source_info *si,
1221 bool on)
1222 {
1223 struct fimc_camclk_info *camclk;
1224 int ret = 0;
1225
1226 if (WARN_ON(si->clk_id >= FIMC_MAX_CAMCLKS) || !fmd || !fmd->pmf)
1227 return -EINVAL;
1228
1229 camclk = &fmd->camclk[si->clk_id];
1230
1231 dbg("camclk %d, f: %lu, use_count: %d, on: %d",
1232 si->clk_id, si->clk_frequency, camclk->use_count, on);
1233
1234 if (on) {
1235 if (camclk->use_count > 0 &&
1236 camclk->frequency != si->clk_frequency)
1237 return -EINVAL;
1238
1239 if (camclk->use_count++ == 0) {
1240 clk_set_rate(camclk->clock, si->clk_frequency);
1241 camclk->frequency = si->clk_frequency;
1242 ret = pm_runtime_get_sync(fmd->pmf);
1243 if (ret < 0)
1244 return ret;
1245 ret = clk_prepare_enable(camclk->clock);
1246 dbg("Enabled camclk %d: f: %lu", si->clk_id,
1247 clk_get_rate(camclk->clock));
1248 }
1249 return ret;
1250 }
1251
1252 if (WARN_ON(camclk->use_count == 0))
1253 return 0;
1254
1255 if (--camclk->use_count == 0) {
1256 clk_disable_unprepare(camclk->clock);
1257 pm_runtime_put(fmd->pmf);
1258 dbg("Disabled camclk %d", si->clk_id);
1259 }
1260 return ret;
1261 }
1262
1263 /**
1264 * fimc_md_set_camclk - peripheral sensor clock setup
1265 * @sd: sensor subdev to configure sclk_cam clock for
1266 * @on: 1 to enable or 0 to disable the clock
1267 *
1268 * There are 2 separate clock outputs available in the SoC for external
1269 * image processors. These clocks are shared between all registered FIMC
1270 * devices to which sensors can be attached, either directly or through
1271 * the MIPI CSI receiver. The clock is allowed here to be used by
1272 * multiple sensors concurrently if they use same frequency.
1273 * This function should only be called when the graph mutex is held.
1274 */
1275 int fimc_md_set_camclk(struct v4l2_subdev *sd, bool on)
1276 {
1277 struct fimc_source_info *si = v4l2_get_subdev_hostdata(sd);
1278 struct fimc_md *fmd = entity_to_fimc_mdev(&sd->entity);
1279
1280 return __fimc_md_set_camclk(fmd, si, on);
1281 }
1282
1283 static int __fimc_md_modify_pipeline(struct media_entity *entity, bool enable)
1284 {
1285 struct exynos_video_entity *ve;
1286 struct fimc_pipeline *p;
1287 struct video_device *vdev;
1288 int ret;
1289
1290 vdev = media_entity_to_video_device(entity);
1291 if (vdev->entity.use_count == 0)
1292 return 0;
1293
1294 ve = vdev_to_exynos_video_entity(vdev);
1295 p = to_fimc_pipeline(ve->pipe);
1296 /*
1297 * Nothing to do if we are disabling the pipeline, some link
1298 * has been disconnected and p->subdevs array is cleared now.
1299 */
1300 if (!enable && p->subdevs[IDX_SENSOR] == NULL)
1301 return 0;
1302
1303 if (enable)
1304 ret = __fimc_pipeline_open(ve->pipe, entity, true);
1305 else
1306 ret = __fimc_pipeline_close(ve->pipe);
1307
1308 if (ret == 0 && !enable)
1309 memset(p->subdevs, 0, sizeof(p->subdevs));
1310
1311 return ret;
1312 }
1313
1314 /* Locking: called with entity->parent->graph_mutex mutex held. */
1315 static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable)
1316 {
1317 struct media_entity *entity_err = entity;
1318 struct media_entity_graph graph;
1319 int ret;
1320
1321 /*
1322 * Walk current graph and call the pipeline open/close routine for each
1323 * opened video node that belongs to the graph of entities connected
1324 * through active links. This is needed as we cannot power on/off the
1325 * subdevs in random order.
1326 */
1327 media_entity_graph_walk_start(&graph, entity);
1328
1329 while ((entity = media_entity_graph_walk_next(&graph))) {
1330 if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
1331 continue;
1332
1333 ret = __fimc_md_modify_pipeline(entity, enable);
1334
1335 if (ret < 0)
1336 goto err;
1337 }
1338
1339 return 0;
1340 err:
1341 media_entity_graph_walk_start(&graph, entity_err);
1342
1343 while ((entity_err = media_entity_graph_walk_next(&graph))) {
1344 if (media_entity_type(entity_err) != MEDIA_ENT_T_DEVNODE)
1345 continue;
1346
1347 __fimc_md_modify_pipeline(entity_err, !enable);
1348
1349 if (entity_err == entity)
1350 break;
1351 }
1352
1353 return ret;
1354 }
1355
1356 static int fimc_md_link_notify(struct media_link *link, unsigned int flags,
1357 unsigned int notification)
1358 {
1359 struct media_entity *sink = link->sink->entity;
1360 int ret = 0;
1361
1362 /* Before link disconnection */
1363 if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH) {
1364 if (!(flags & MEDIA_LNK_FL_ENABLED))
1365 ret = __fimc_md_modify_pipelines(sink, false);
1366 else
1367 ; /* TODO: Link state change validation */
1368 /* After link activation */
1369 } else if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH &&
1370 (link->flags & MEDIA_LNK_FL_ENABLED)) {
1371 ret = __fimc_md_modify_pipelines(sink, true);
1372 }
1373
1374 return ret ? -EPIPE : 0;
1375 }
1376
1377 static ssize_t fimc_md_sysfs_show(struct device *dev,
1378 struct device_attribute *attr, char *buf)
1379 {
1380 struct platform_device *pdev = to_platform_device(dev);
1381 struct fimc_md *fmd = platform_get_drvdata(pdev);
1382
1383 if (fmd->user_subdev_api)
1384 return strlcpy(buf, "Sub-device API (sub-dev)\n", PAGE_SIZE);
1385
1386 return strlcpy(buf, "V4L2 video node only API (vid-dev)\n", PAGE_SIZE);
1387 }
1388
1389 static ssize_t fimc_md_sysfs_store(struct device *dev,
1390 struct device_attribute *attr,
1391 const char *buf, size_t count)
1392 {
1393 struct platform_device *pdev = to_platform_device(dev);
1394 struct fimc_md *fmd = platform_get_drvdata(pdev);
1395 bool subdev_api;
1396 int i;
1397
1398 if (!strcmp(buf, "vid-dev\n"))
1399 subdev_api = false;
1400 else if (!strcmp(buf, "sub-dev\n"))
1401 subdev_api = true;
1402 else
1403 return count;
1404
1405 fmd->user_subdev_api = subdev_api;
1406 for (i = 0; i < FIMC_MAX_DEVS; i++)
1407 if (fmd->fimc[i])
1408 fmd->fimc[i]->vid_cap.user_subdev_api = subdev_api;
1409 return count;
1410 }
1411 /*
1412 * This device attribute is to select video pipeline configuration method.
1413 * There are following valid values:
1414 * vid-dev - for V4L2 video node API only, subdevice will be configured
1415 * by the host driver.
1416 * sub-dev - for media controller API, subdevs must be configured in user
1417 * space before starting streaming.
1418 */
1419 static DEVICE_ATTR(subdev_conf_mode, S_IWUSR | S_IRUGO,
1420 fimc_md_sysfs_show, fimc_md_sysfs_store);
1421
1422 static int fimc_md_get_pinctrl(struct fimc_md *fmd)
1423 {
1424 struct device *dev = &fmd->pdev->dev;
1425 struct fimc_pinctrl *pctl = &fmd->pinctl;
1426
1427 pctl->pinctrl = devm_pinctrl_get(dev);
1428 if (IS_ERR(pctl->pinctrl))
1429 return PTR_ERR(pctl->pinctrl);
1430
1431 pctl->state_default = pinctrl_lookup_state(pctl->pinctrl,
1432 PINCTRL_STATE_DEFAULT);
1433 if (IS_ERR(pctl->state_default))
1434 return PTR_ERR(pctl->state_default);
1435
1436 pctl->state_idle = pinctrl_lookup_state(pctl->pinctrl,
1437 PINCTRL_STATE_IDLE);
1438 return 0;
1439 }
1440
1441 static int fimc_md_probe(struct platform_device *pdev)
1442 {
1443 struct device *dev = &pdev->dev;
1444 struct v4l2_device *v4l2_dev;
1445 struct fimc_md *fmd;
1446 int ret;
1447
1448 fmd = devm_kzalloc(dev, sizeof(*fmd), GFP_KERNEL);
1449 if (!fmd)
1450 return -ENOMEM;
1451
1452 spin_lock_init(&fmd->slock);
1453 fmd->pdev = pdev;
1454 INIT_LIST_HEAD(&fmd->pipelines);
1455
1456 strlcpy(fmd->media_dev.model, "SAMSUNG S5P FIMC",
1457 sizeof(fmd->media_dev.model));
1458 fmd->media_dev.link_notify = fimc_md_link_notify;
1459 fmd->media_dev.dev = dev;
1460
1461 v4l2_dev = &fmd->v4l2_dev;
1462 v4l2_dev->mdev = &fmd->media_dev;
1463 v4l2_dev->notify = fimc_sensor_notify;
1464 strlcpy(v4l2_dev->name, "s5p-fimc-md", sizeof(v4l2_dev->name));
1465
1466 fmd->use_isp = fimc_md_is_isp_available(dev->of_node);
1467
1468 ret = v4l2_device_register(dev, &fmd->v4l2_dev);
1469 if (ret < 0) {
1470 v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret);
1471 return ret;
1472 }
1473 ret = media_device_register(&fmd->media_dev);
1474 if (ret < 0) {
1475 v4l2_err(v4l2_dev, "Failed to register media device: %d\n", ret);
1476 goto err_md;
1477 }
1478 ret = fimc_md_get_clocks(fmd);
1479 if (ret)
1480 goto err_clk;
1481
1482 fmd->user_subdev_api = (dev->of_node != NULL);
1483
1484 /* Protect the media graph while we're registering entities */
1485 mutex_lock(&fmd->media_dev.graph_mutex);
1486
1487 ret = fimc_md_get_pinctrl(fmd);
1488 if (ret < 0) {
1489 if (ret != EPROBE_DEFER)
1490 dev_err(dev, "Failed to get pinctrl: %d\n", ret);
1491 goto err_unlock;
1492 }
1493
1494 if (dev->of_node)
1495 ret = fimc_md_register_of_platform_entities(fmd, dev->of_node);
1496 else
1497 ret = bus_for_each_dev(&platform_bus_type, NULL, fmd,
1498 fimc_md_pdev_match);
1499 if (ret)
1500 goto err_unlock;
1501
1502 if (dev->platform_data || dev->of_node) {
1503 ret = fimc_md_register_sensor_entities(fmd);
1504 if (ret)
1505 goto err_unlock;
1506 }
1507
1508 ret = fimc_md_create_links(fmd);
1509 if (ret)
1510 goto err_unlock;
1511 ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev);
1512 if (ret)
1513 goto err_unlock;
1514
1515 ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1516 if (ret)
1517 goto err_unlock;
1518
1519 platform_set_drvdata(pdev, fmd);
1520 mutex_unlock(&fmd->media_dev.graph_mutex);
1521 return 0;
1522
1523 err_unlock:
1524 mutex_unlock(&fmd->media_dev.graph_mutex);
1525 err_clk:
1526 fimc_md_put_clocks(fmd);
1527 fimc_md_unregister_entities(fmd);
1528 media_device_unregister(&fmd->media_dev);
1529 err_md:
1530 v4l2_device_unregister(&fmd->v4l2_dev);
1531 return ret;
1532 }
1533
1534 static int fimc_md_remove(struct platform_device *pdev)
1535 {
1536 struct fimc_md *fmd = platform_get_drvdata(pdev);
1537
1538 if (!fmd)
1539 return 0;
1540
1541 v4l2_device_unregister(&fmd->v4l2_dev);
1542 device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1543 fimc_md_unregister_entities(fmd);
1544 fimc_md_pipelines_free(fmd);
1545 media_device_unregister(&fmd->media_dev);
1546 fimc_md_put_clocks(fmd);
1547 return 0;
1548 }
1549
1550 static struct platform_device_id fimc_driver_ids[] __always_unused = {
1551 { .name = "s5p-fimc-md" },
1552 { },
1553 };
1554 MODULE_DEVICE_TABLE(platform, fimc_driver_ids);
1555
1556 static const struct of_device_id fimc_md_of_match[] = {
1557 { .compatible = "samsung,fimc" },
1558 { },
1559 };
1560 MODULE_DEVICE_TABLE(of, fimc_md_of_match);
1561
1562 static struct platform_driver fimc_md_driver = {
1563 .probe = fimc_md_probe,
1564 .remove = fimc_md_remove,
1565 .driver = {
1566 .of_match_table = of_match_ptr(fimc_md_of_match),
1567 .name = "s5p-fimc-md",
1568 .owner = THIS_MODULE,
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");
(deprecated) Btrfs devel tree