2 * S5P/EXYNOS4 SoC series camera host interface media device driver
4 * Copyright (C) 2011 Samsung Electronics Co., Ltd.
5 * Contact: Sylwester Nawrocki, <s.nawrocki@samsung.com>
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.
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/platform_device.h>
21 #include <linux/pm_runtime.h>
22 #include <linux/types.h>
23 #include <linux/slab.h>
24 #include <media/v4l2-ctrls.h>
25 #include <media/media-device.h>
27 #include "fimc-core.h"
28 #include "fimc-lite.h"
29 #include "fimc-mdevice.h"
30 #include "mipi-csis.h"
32 static int __fimc_md_set_camclk(struct fimc_md *fmd,
33 struct fimc_sensor_info *s_info,
36 * fimc_pipeline_prepare - update pipeline information with subdevice pointers
37 * @fimc: fimc device terminating the pipeline
39 * Caller holds the graph mutex.
41 void fimc_pipeline_prepare(struct fimc_pipeline *p, struct media_entity *me)
43 struct media_pad *pad = &me->pads[0];
44 struct v4l2_subdev *sd;
47 for (i = 0; i < IDX_MAX; i++)
51 if (!(pad->flags & MEDIA_PAD_FL_SINK))
55 pad = media_entity_remote_source(pad);
57 media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
60 sd = media_entity_to_v4l2_subdev(pad->entity);
64 p->subdevs[IDX_SENSOR] = sd;
67 p->subdevs[IDX_CSIS] = sd;
70 p->subdevs[IDX_FLITE] = sd;
73 /* No need to control FIMC subdev through subdev ops */
76 pr_warn("%s: Unknown subdev grp_id: %#x\n",
77 __func__, sd->grp_id);
80 pad = &sd->entity.pads[0];
85 * __subdev_set_power - change power state of a single subdev
86 * @sd: subdevice to change power state for
87 * @on: 1 to enable power or 0 to disable
89 * Return result of s_power subdev operation or -ENXIO if sd argument
90 * is NULL. Return 0 if the subdevice does not implement s_power.
92 static int __subdev_set_power(struct v4l2_subdev *sd, int on)
100 use_count = &sd->entity.use_count;
101 if (on && (*use_count)++ > 0)
103 else if (!on && (*use_count == 0 || --(*use_count) > 0))
105 ret = v4l2_subdev_call(sd, core, s_power, on);
107 return ret != -ENOIOCTLCMD ? ret : 0;
111 * fimc_pipeline_s_power - change power state of all pipeline subdevs
112 * @fimc: fimc device terminating the pipeline
113 * @state: true to power on, false to power off
115 * Needs to be called with the graph mutex held.
117 int fimc_pipeline_s_power(struct fimc_pipeline *p, bool state)
122 if (p->subdevs[IDX_SENSOR] == NULL)
125 for (i = 0; i < IDX_MAX; i++) {
126 unsigned int idx = state ? (IDX_MAX - 1) - i : i;
128 ret = __subdev_set_power(p->subdevs[idx], state);
129 if (ret < 0 && ret != -ENXIO)
137 * __fimc_pipeline_initialize - update the pipeline information, enable power
138 * of all pipeline subdevs and the sensor clock
139 * @me: media entity to start graph walk with
140 * @prep: true to acquire sensor (and csis) subdevs
142 * This function must be called with the graph mutex held.
144 static int __fimc_pipeline_initialize(struct fimc_pipeline *p,
145 struct media_entity *me, bool prep)
150 fimc_pipeline_prepare(p, me);
152 if (p->subdevs[IDX_SENSOR] == NULL)
155 ret = fimc_md_set_camclk(p->subdevs[IDX_SENSOR], true);
159 return fimc_pipeline_s_power(p, 1);
162 int fimc_pipeline_initialize(struct fimc_pipeline *p, struct media_entity *me,
167 mutex_lock(&me->parent->graph_mutex);
168 ret = __fimc_pipeline_initialize(p, me, prep);
169 mutex_unlock(&me->parent->graph_mutex);
173 EXPORT_SYMBOL_GPL(fimc_pipeline_initialize);
176 * __fimc_pipeline_shutdown - disable the sensor clock and pipeline power
177 * @fimc: fimc device terminating the pipeline
179 * Disable power of all subdevs in the pipeline and turn off the external
181 * Called with the graph mutex held.
183 int __fimc_pipeline_shutdown(struct fimc_pipeline *p)
187 if (p->subdevs[IDX_SENSOR]) {
188 ret = fimc_pipeline_s_power(p, 0);
189 fimc_md_set_camclk(p->subdevs[IDX_SENSOR], false);
191 return ret == -ENXIO ? 0 : ret;
194 int fimc_pipeline_shutdown(struct fimc_pipeline *p)
196 struct media_entity *me;
199 if (!p || !p->subdevs[IDX_SENSOR])
202 me = &p->subdevs[IDX_SENSOR]->entity;
203 mutex_lock(&me->parent->graph_mutex);
204 ret = __fimc_pipeline_shutdown(p);
205 mutex_unlock(&me->parent->graph_mutex);
209 EXPORT_SYMBOL_GPL(fimc_pipeline_shutdown);
212 * fimc_pipeline_s_stream - invoke s_stream on pipeline subdevs
213 * @pipeline: video pipeline structure
214 * @on: passed as the s_stream call argument
216 int fimc_pipeline_s_stream(struct fimc_pipeline *p, bool on)
220 if (p->subdevs[IDX_SENSOR] == NULL)
223 for (i = 0; i < IDX_MAX; i++) {
224 unsigned int idx = on ? (IDX_MAX - 1) - i : i;
226 ret = v4l2_subdev_call(p->subdevs[idx], video, s_stream, on);
228 if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
235 EXPORT_SYMBOL_GPL(fimc_pipeline_s_stream);
238 * Sensor subdevice helper functions
240 static struct v4l2_subdev *fimc_md_register_sensor(struct fimc_md *fmd,
241 struct fimc_sensor_info *s_info)
243 struct i2c_adapter *adapter;
244 struct v4l2_subdev *sd = NULL;
249 adapter = i2c_get_adapter(s_info->pdata->i2c_bus_num);
251 v4l2_warn(&fmd->v4l2_dev,
252 "Failed to get I2C adapter %d, deferring probe\n",
253 s_info->pdata->i2c_bus_num);
254 return ERR_PTR(-EPROBE_DEFER);
256 sd = v4l2_i2c_new_subdev_board(&fmd->v4l2_dev, adapter,
257 s_info->pdata->board_info, NULL);
258 if (IS_ERR_OR_NULL(sd)) {
259 i2c_put_adapter(adapter);
260 v4l2_warn(&fmd->v4l2_dev,
261 "Failed to acquire subdev %s, deferring probe\n",
262 s_info->pdata->board_info->type);
263 return ERR_PTR(-EPROBE_DEFER);
265 v4l2_set_subdev_hostdata(sd, s_info);
266 sd->grp_id = SENSOR_GROUP_ID;
268 v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice %s\n",
269 s_info->pdata->board_info->type);
273 static void fimc_md_unregister_sensor(struct v4l2_subdev *sd)
275 struct i2c_client *client = v4l2_get_subdevdata(sd);
276 struct i2c_adapter *adapter;
280 v4l2_device_unregister_subdev(sd);
281 adapter = client->adapter;
282 i2c_unregister_device(client);
284 i2c_put_adapter(adapter);
287 static int fimc_md_register_sensor_entities(struct fimc_md *fmd)
289 struct s5p_platform_fimc *pdata = fmd->pdev->dev.platform_data;
290 struct fimc_dev *fd = NULL;
291 int num_clients, ret, i;
294 * Runtime resume one of the FIMC entities to make sure
295 * the sclk_cam clocks are not globally disabled.
297 for (i = 0; !fd && i < ARRAY_SIZE(fmd->fimc); i++)
302 ret = pm_runtime_get_sync(&fd->pdev->dev);
306 WARN_ON(pdata->num_clients > ARRAY_SIZE(fmd->sensor));
307 num_clients = min_t(u32, pdata->num_clients, ARRAY_SIZE(fmd->sensor));
309 fmd->num_sensors = num_clients;
310 for (i = 0; i < num_clients; i++) {
311 struct v4l2_subdev *sd;
313 fmd->sensor[i].pdata = &pdata->isp_info[i];
314 ret = __fimc_md_set_camclk(fmd, &fmd->sensor[i], true);
317 sd = fimc_md_register_sensor(fmd, &fmd->sensor[i]);
318 ret = __fimc_md_set_camclk(fmd, &fmd->sensor[i], false);
321 fmd->sensor[i].subdev = sd;
323 fmd->sensor[i].subdev = NULL;
330 pm_runtime_put(&fd->pdev->dev);
335 * MIPI CSIS and FIMC platform devices registration.
337 static int fimc_register_callback(struct device *dev, void *p)
339 struct fimc_dev *fimc = dev_get_drvdata(dev);
340 struct v4l2_subdev *sd = &fimc->vid_cap.subdev;
341 struct fimc_md *fmd = p;
344 if (!fimc || !fimc->pdev)
347 if (fimc->pdev->id < 0 || fimc->pdev->id >= FIMC_MAX_DEVS)
350 fmd->fimc[fimc->pdev->id] = fimc;
351 sd->grp_id = FIMC_GROUP_ID;
353 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
355 v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.%d (%d)\n",
362 static int fimc_lite_register_callback(struct device *dev, void *p)
364 struct fimc_lite *fimc = dev_get_drvdata(dev);
365 struct v4l2_subdev *sd = &fimc->subdev;
366 struct fimc_md *fmd = p;
372 if (fimc->index >= FIMC_LITE_MAX_DEVS)
375 fmd->fimc_lite[fimc->index] = fimc;
376 sd->grp_id = FLITE_GROUP_ID;
378 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
380 v4l2_err(&fmd->v4l2_dev,
381 "Failed to register FIMC-LITE.%d (%d)\n",
387 static int csis_register_callback(struct device *dev, void *p)
389 struct v4l2_subdev *sd = dev_get_drvdata(dev);
390 struct platform_device *pdev;
391 struct fimc_md *fmd = p;
396 pdev = v4l2_get_subdevdata(sd);
397 if (!pdev || pdev->id < 0 || pdev->id >= CSIS_MAX_ENTITIES)
399 v4l2_info(sd, "csis%d sd: %s\n", pdev->id, sd->name);
401 id = pdev->id < 0 ? 0 : pdev->id;
402 fmd->csis[id].sd = sd;
403 sd->grp_id = CSIS_GROUP_ID;
404 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
406 v4l2_err(&fmd->v4l2_dev,
407 "Failed to register CSIS subdevice: %d\n", ret);
412 * fimc_md_register_platform_entities - register FIMC and CSIS media entities
414 static int fimc_md_register_platform_entities(struct fimc_md *fmd)
416 struct s5p_platform_fimc *pdata = fmd->pdev->dev.platform_data;
417 struct device_driver *driver;
420 driver = driver_find(FIMC_MODULE_NAME, &platform_bus_type);
422 v4l2_warn(&fmd->v4l2_dev,
423 "%s driver not found, deffering probe\n",
425 return -EPROBE_DEFER;
428 ret = driver_for_each_device(driver, NULL, fmd,
429 fimc_register_callback);
433 driver = driver_find(FIMC_LITE_DRV_NAME, &platform_bus_type);
434 if (driver && try_module_get(driver->owner)) {
435 ret = driver_for_each_device(driver, NULL, fmd,
436 fimc_lite_register_callback);
439 module_put(driver->owner);
442 * Check if there is any sensor on the MIPI-CSI2 bus and
443 * if not skip the s5p-csis module loading.
447 for (i = 0; i < pdata->num_clients; i++) {
448 if (pdata->isp_info[i].bus_type == FIMC_MIPI_CSI2) {
456 driver = driver_find(CSIS_DRIVER_NAME, &platform_bus_type);
457 if (!driver || !try_module_get(driver->owner)) {
458 v4l2_warn(&fmd->v4l2_dev,
459 "%s driver not found, deffering probe\n",
461 return -EPROBE_DEFER;
464 return driver_for_each_device(driver, NULL, fmd,
465 csis_register_callback);
468 static void fimc_md_unregister_entities(struct fimc_md *fmd)
472 for (i = 0; i < FIMC_MAX_DEVS; i++) {
473 if (fmd->fimc[i] == NULL)
475 v4l2_device_unregister_subdev(&fmd->fimc[i]->vid_cap.subdev);
478 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
479 if (fmd->fimc_lite[i] == NULL)
481 v4l2_device_unregister_subdev(&fmd->fimc_lite[i]->subdev);
482 fmd->fimc_lite[i] = NULL;
484 for (i = 0; i < CSIS_MAX_ENTITIES; i++) {
485 if (fmd->csis[i].sd == NULL)
487 v4l2_device_unregister_subdev(fmd->csis[i].sd);
488 module_put(fmd->csis[i].sd->owner);
489 fmd->csis[i].sd = NULL;
491 for (i = 0; i < fmd->num_sensors; i++) {
492 if (fmd->sensor[i].subdev == NULL)
494 fimc_md_unregister_sensor(fmd->sensor[i].subdev);
495 fmd->sensor[i].subdev = NULL;
500 * __fimc_md_create_fimc_links - create links to all FIMC entities
501 * @fmd: fimc media device
502 * @source: the source entity to create links to all fimc entities from
503 * @sensor: sensor subdev linked to FIMC[fimc_id] entity, may be null
504 * @pad: the source entity pad index
505 * @link_mask: bitmask of the fimc devices for which link should be enabled
507 static int __fimc_md_create_fimc_sink_links(struct fimc_md *fmd,
508 struct media_entity *source,
509 struct v4l2_subdev *sensor,
510 int pad, int link_mask)
512 struct fimc_sensor_info *s_info;
513 struct media_entity *sink;
514 unsigned int flags = 0;
517 for (i = 0; i < FIMC_MAX_DEVS; i++) {
521 * Some FIMC variants are not fitted with camera capture
522 * interface. Skip creating a link from sensor for those.
524 if (!fmd->fimc[i]->variant->has_cam_if)
527 flags = ((1 << i) & link_mask) ? MEDIA_LNK_FL_ENABLED : 0;
529 sink = &fmd->fimc[i]->vid_cap.subdev.entity;
530 ret = media_entity_create_link(source, pad, sink,
531 FIMC_SD_PAD_SINK, flags);
535 /* Notify FIMC capture subdev entity */
536 ret = media_entity_call(sink, link_setup, &sink->pads[0],
537 &source->pads[pad], flags);
541 v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]",
542 source->name, flags ? '=' : '-', sink->name);
544 if (flags == 0 || sensor == NULL)
546 s_info = v4l2_get_subdev_hostdata(sensor);
547 if (!WARN_ON(s_info == NULL)) {
548 unsigned long irq_flags;
549 spin_lock_irqsave(&fmd->slock, irq_flags);
550 s_info->host = fmd->fimc[i];
551 spin_unlock_irqrestore(&fmd->slock, irq_flags);
555 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
556 if (!fmd->fimc_lite[i])
559 if (link_mask & (1 << (i + FIMC_MAX_DEVS)))
560 flags = MEDIA_LNK_FL_ENABLED;
564 sink = &fmd->fimc_lite[i]->subdev.entity;
565 ret = media_entity_create_link(source, pad, sink,
566 FLITE_SD_PAD_SINK, flags);
570 /* Notify FIMC-LITE subdev entity */
571 ret = media_entity_call(sink, link_setup, &sink->pads[0],
572 &source->pads[pad], flags);
576 v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]",
577 source->name, flags ? '=' : '-', sink->name);
582 /* Create links from FIMC-LITE source pads to other entities */
583 static int __fimc_md_create_flite_source_links(struct fimc_md *fmd)
585 struct media_entity *source, *sink;
586 unsigned int flags = MEDIA_LNK_FL_ENABLED;
589 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
590 struct fimc_lite *fimc = fmd->fimc_lite[i];
593 source = &fimc->subdev.entity;
594 sink = &fimc->vfd->entity;
595 /* FIMC-LITE's subdev and video node */
596 ret = media_entity_create_link(source, FIMC_SD_PAD_SOURCE,
600 /* TODO: create links to other entities */
607 * fimc_md_create_links - create default links between registered entities
609 * Parallel interface sensor entities are connected directly to FIMC capture
610 * entities. The sensors using MIPI CSIS bus are connected through immutable
611 * link with CSI receiver entity specified by mux_id. Any registered CSIS
612 * entity has a link to each registered FIMC capture entity. Enabled links
613 * are created by default between each subsequent registered sensor and
614 * subsequent FIMC capture entity. The number of default active links is
615 * determined by the number of available sensors or FIMC entities,
618 static int fimc_md_create_links(struct fimc_md *fmd)
620 struct v4l2_subdev *sensor, *csis;
621 struct s5p_fimc_isp_info *pdata;
622 struct fimc_sensor_info *s_info;
623 struct media_entity *source, *sink;
624 int i, pad, fimc_id = 0, ret = 0;
625 u32 flags, link_mask = 0;
627 for (i = 0; i < fmd->num_sensors; i++) {
628 if (fmd->sensor[i].subdev == NULL)
631 sensor = fmd->sensor[i].subdev;
632 s_info = v4l2_get_subdev_hostdata(sensor);
633 if (!s_info || !s_info->pdata)
637 pdata = s_info->pdata;
639 switch (pdata->bus_type) {
641 if (WARN(pdata->mux_id >= CSIS_MAX_ENTITIES,
642 "Wrong CSI channel id: %d\n", pdata->mux_id))
645 csis = fmd->csis[pdata->mux_id].sd;
646 if (WARN(csis == NULL,
647 "MIPI-CSI interface specified "
648 "but s5p-csis module is not loaded!\n"))
651 ret = media_entity_create_link(&sensor->entity, 0,
652 &csis->entity, CSIS_PAD_SINK,
653 MEDIA_LNK_FL_IMMUTABLE |
654 MEDIA_LNK_FL_ENABLED);
658 v4l2_info(&fmd->v4l2_dev, "created link [%s] => [%s]",
659 sensor->entity.name, csis->entity.name);
664 case FIMC_ITU_601...FIMC_ITU_656:
665 source = &sensor->entity;
670 v4l2_err(&fmd->v4l2_dev, "Wrong bus_type: %x\n",
677 link_mask = 1 << fimc_id++;
678 ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor,
682 for (i = 0; i < ARRAY_SIZE(fmd->csis); i++) {
683 if (fmd->csis[i].sd == NULL)
685 source = &fmd->csis[i].sd->entity;
686 pad = CSIS_PAD_SOURCE;
688 link_mask = 1 << fimc_id++;
689 ret = __fimc_md_create_fimc_sink_links(fmd, source, NULL,
693 /* Create immutable links between each FIMC's subdev and video node */
694 flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED;
695 for (i = 0; i < FIMC_MAX_DEVS; i++) {
698 source = &fmd->fimc[i]->vid_cap.subdev.entity;
699 sink = &fmd->fimc[i]->vid_cap.vfd->entity;
700 ret = media_entity_create_link(source, FIMC_SD_PAD_SOURCE,
706 return __fimc_md_create_flite_source_links(fmd);
710 * The peripheral sensor clock management.
712 static int fimc_md_get_clocks(struct fimc_md *fmd)
718 for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
719 snprintf(clk_name, sizeof(clk_name), "sclk_cam%u", i);
720 clock = clk_get(NULL, clk_name);
721 if (IS_ERR_OR_NULL(clock)) {
722 v4l2_err(&fmd->v4l2_dev, "Failed to get clock: %s",
726 fmd->camclk[i].clock = clock;
731 static void fimc_md_put_clocks(struct fimc_md *fmd)
733 int i = FIMC_MAX_CAMCLKS;
736 if (IS_ERR_OR_NULL(fmd->camclk[i].clock))
738 clk_put(fmd->camclk[i].clock);
739 fmd->camclk[i].clock = NULL;
743 static int __fimc_md_set_camclk(struct fimc_md *fmd,
744 struct fimc_sensor_info *s_info,
747 struct s5p_fimc_isp_info *pdata = s_info->pdata;
748 struct fimc_camclk_info *camclk;
751 if (WARN_ON(pdata->clk_id >= FIMC_MAX_CAMCLKS) || fmd == NULL)
754 camclk = &fmd->camclk[pdata->clk_id];
756 dbg("camclk %d, f: %lu, use_count: %d, on: %d",
757 pdata->clk_id, pdata->clk_frequency, camclk->use_count, on);
760 if (camclk->use_count > 0 &&
761 camclk->frequency != pdata->clk_frequency)
764 if (camclk->use_count++ == 0) {
765 clk_set_rate(camclk->clock, pdata->clk_frequency);
766 camclk->frequency = pdata->clk_frequency;
767 ret = clk_enable(camclk->clock);
768 dbg("Enabled camclk %d: f: %lu", pdata->clk_id,
769 clk_get_rate(camclk->clock));
774 if (WARN_ON(camclk->use_count == 0))
777 if (--camclk->use_count == 0) {
778 clk_disable(camclk->clock);
779 dbg("Disabled camclk %d", pdata->clk_id);
785 * fimc_md_set_camclk - peripheral sensor clock setup
786 * @sd: sensor subdev to configure sclk_cam clock for
787 * @on: 1 to enable or 0 to disable the clock
789 * There are 2 separate clock outputs available in the SoC for external
790 * image processors. These clocks are shared between all registered FIMC
791 * devices to which sensors can be attached, either directly or through
792 * the MIPI CSI receiver. The clock is allowed here to be used by
793 * multiple sensors concurrently if they use same frequency.
794 * This function should only be called when the graph mutex is held.
796 int fimc_md_set_camclk(struct v4l2_subdev *sd, bool on)
798 struct fimc_sensor_info *s_info = v4l2_get_subdev_hostdata(sd);
799 struct fimc_md *fmd = entity_to_fimc_mdev(&sd->entity);
801 return __fimc_md_set_camclk(fmd, s_info, on);
804 static int fimc_md_link_notify(struct media_pad *source,
805 struct media_pad *sink, u32 flags)
807 struct fimc_lite *fimc_lite = NULL;
808 struct fimc_dev *fimc = NULL;
809 struct fimc_pipeline *pipeline;
810 struct v4l2_subdev *sd;
813 if (media_entity_type(sink->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
816 sd = media_entity_to_v4l2_subdev(sink->entity);
818 switch (sd->grp_id) {
820 fimc_lite = v4l2_get_subdevdata(sd);
821 pipeline = &fimc_lite->pipeline;
824 fimc = v4l2_get_subdevdata(sd);
825 pipeline = &fimc->pipeline;
831 if (!(flags & MEDIA_LNK_FL_ENABLED)) {
832 ret = __fimc_pipeline_shutdown(pipeline);
833 pipeline->subdevs[IDX_SENSOR] = NULL;
834 pipeline->subdevs[IDX_CSIS] = NULL;
837 mutex_lock(&fimc->lock);
838 fimc_ctrls_delete(fimc->vid_cap.ctx);
839 mutex_unlock(&fimc->lock);
844 * Link activation. Enable power of pipeline elements only if the
845 * pipeline is already in use, i.e. its video node is opened.
846 * Recreate the controls destroyed during the link deactivation.
849 mutex_lock(&fimc->lock);
850 if (fimc->vid_cap.refcnt > 0) {
851 ret = __fimc_pipeline_initialize(pipeline,
852 source->entity, true);
854 ret = fimc_capture_ctrls_create(fimc);
856 mutex_unlock(&fimc->lock);
858 mutex_lock(&fimc_lite->lock);
859 if (fimc_lite->ref_count > 0) {
860 ret = __fimc_pipeline_initialize(pipeline,
861 source->entity, true);
863 mutex_unlock(&fimc_lite->lock);
865 return ret ? -EPIPE : ret;
868 static ssize_t fimc_md_sysfs_show(struct device *dev,
869 struct device_attribute *attr, char *buf)
871 struct platform_device *pdev = to_platform_device(dev);
872 struct fimc_md *fmd = platform_get_drvdata(pdev);
874 if (fmd->user_subdev_api)
875 return strlcpy(buf, "Sub-device API (sub-dev)\n", PAGE_SIZE);
877 return strlcpy(buf, "V4L2 video node only API (vid-dev)\n", PAGE_SIZE);
880 static ssize_t fimc_md_sysfs_store(struct device *dev,
881 struct device_attribute *attr,
882 const char *buf, size_t count)
884 struct platform_device *pdev = to_platform_device(dev);
885 struct fimc_md *fmd = platform_get_drvdata(pdev);
889 if (!strcmp(buf, "vid-dev\n"))
891 else if (!strcmp(buf, "sub-dev\n"))
896 fmd->user_subdev_api = subdev_api;
897 for (i = 0; i < FIMC_MAX_DEVS; i++)
899 fmd->fimc[i]->vid_cap.user_subdev_api = subdev_api;
903 * This device attribute is to select video pipeline configuration method.
904 * There are following valid values:
905 * vid-dev - for V4L2 video node API only, subdevice will be configured
906 * by the host driver.
907 * sub-dev - for media controller API, subdevs must be configured in user
908 * space before starting streaming.
910 static DEVICE_ATTR(subdev_conf_mode, S_IWUSR | S_IRUGO,
911 fimc_md_sysfs_show, fimc_md_sysfs_store);
913 static int fimc_md_probe(struct platform_device *pdev)
915 struct v4l2_device *v4l2_dev;
919 fmd = devm_kzalloc(&pdev->dev, sizeof(*fmd), GFP_KERNEL);
923 spin_lock_init(&fmd->slock);
926 strlcpy(fmd->media_dev.model, "SAMSUNG S5P FIMC",
927 sizeof(fmd->media_dev.model));
928 fmd->media_dev.link_notify = fimc_md_link_notify;
929 fmd->media_dev.dev = &pdev->dev;
931 v4l2_dev = &fmd->v4l2_dev;
932 v4l2_dev->mdev = &fmd->media_dev;
933 v4l2_dev->notify = fimc_sensor_notify;
934 snprintf(v4l2_dev->name, sizeof(v4l2_dev->name), "%s",
935 dev_name(&pdev->dev));
937 ret = v4l2_device_register(&pdev->dev, &fmd->v4l2_dev);
939 v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret);
942 ret = media_device_register(&fmd->media_dev);
944 v4l2_err(v4l2_dev, "Failed to register media device: %d\n", ret);
947 ret = fimc_md_get_clocks(fmd);
951 fmd->user_subdev_api = false;
953 /* Protect the media graph while we're registering entities */
954 mutex_lock(&fmd->media_dev.graph_mutex);
956 ret = fimc_md_register_platform_entities(fmd);
960 if (pdev->dev.platform_data) {
961 ret = fimc_md_register_sensor_entities(fmd);
965 ret = fimc_md_create_links(fmd);
968 ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev);
972 ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode);
976 platform_set_drvdata(pdev, fmd);
977 mutex_unlock(&fmd->media_dev.graph_mutex);
981 mutex_unlock(&fmd->media_dev.graph_mutex);
983 media_device_unregister(&fmd->media_dev);
984 fimc_md_put_clocks(fmd);
985 fimc_md_unregister_entities(fmd);
987 v4l2_device_unregister(&fmd->v4l2_dev);
991 static int __devexit fimc_md_remove(struct platform_device *pdev)
993 struct fimc_md *fmd = platform_get_drvdata(pdev);
997 device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
998 fimc_md_unregister_entities(fmd);
999 media_device_unregister(&fmd->media_dev);
1000 fimc_md_put_clocks(fmd);
1004 static struct platform_driver fimc_md_driver = {
1005 .probe = fimc_md_probe,
1006 .remove = __devexit_p(fimc_md_remove),
1008 .name = "s5p-fimc-md",
1009 .owner = THIS_MODULE,
1013 int __init fimc_md_init(void)
1017 request_module("s5p-csis");
1018 ret = fimc_register_driver();
1022 return platform_driver_register(&fimc_md_driver);
1024 void __exit fimc_md_exit(void)
1026 platform_driver_unregister(&fimc_md_driver);
1027 fimc_unregister_driver();
1030 module_init(fimc_md_init);
1031 module_exit(fimc_md_exit);
1033 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
1034 MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver");
1035 MODULE_LICENSE("GPL");
1036 MODULE_VERSION("2.0.1");