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>
26 #include <media/s5p_fimc.h>
28 #include "fimc-core.h"
29 #include "fimc-lite.h"
30 #include "fimc-mdevice.h"
31 #include "mipi-csis.h"
33 static int __fimc_md_set_camclk(struct fimc_md
*fmd
,
34 struct fimc_sensor_info
*s_info
,
37 * fimc_pipeline_prepare - update pipeline information with subdevice pointers
38 * @fimc: fimc device terminating the pipeline
40 * Caller holds the graph mutex.
42 static void fimc_pipeline_prepare(struct fimc_pipeline
*p
,
43 struct media_entity
*me
)
45 struct media_pad
*pad
= &me
->pads
[0];
46 struct v4l2_subdev
*sd
;
49 for (i
= 0; i
< IDX_MAX
; i
++)
53 if (!(pad
->flags
& MEDIA_PAD_FL_SINK
))
57 pad
= media_entity_remote_source(pad
);
59 media_entity_type(pad
->entity
) != MEDIA_ENT_T_V4L2_SUBDEV
)
62 sd
= media_entity_to_v4l2_subdev(pad
->entity
);
66 p
->subdevs
[IDX_SENSOR
] = sd
;
69 p
->subdevs
[IDX_CSIS
] = sd
;
72 p
->subdevs
[IDX_FLITE
] = sd
;
75 /* No need to control FIMC subdev through subdev ops */
78 pr_warn("%s: Unknown subdev grp_id: %#x\n",
79 __func__
, sd
->grp_id
);
82 pad
= &sd
->entity
.pads
[0];
87 * __subdev_set_power - change power state of a single subdev
88 * @sd: subdevice to change power state for
89 * @on: 1 to enable power or 0 to disable
91 * Return result of s_power subdev operation or -ENXIO if sd argument
92 * is NULL. Return 0 if the subdevice does not implement s_power.
94 static int __subdev_set_power(struct v4l2_subdev
*sd
, int on
)
102 use_count
= &sd
->entity
.use_count
;
103 if (on
&& (*use_count
)++ > 0)
105 else if (!on
&& (*use_count
== 0 || --(*use_count
) > 0))
107 ret
= v4l2_subdev_call(sd
, core
, s_power
, on
);
109 return ret
!= -ENOIOCTLCMD
? ret
: 0;
113 * fimc_pipeline_s_power - change power state of all pipeline subdevs
114 * @fimc: fimc device terminating the pipeline
115 * @state: true to power on, false to power off
117 * Needs to be called with the graph mutex held.
119 static int fimc_pipeline_s_power(struct fimc_pipeline
*p
, bool state
)
124 if (p
->subdevs
[IDX_SENSOR
] == NULL
)
127 for (i
= 0; i
< IDX_MAX
; i
++) {
128 unsigned int idx
= state
? (IDX_MAX
- 1) - i
: i
;
130 ret
= __subdev_set_power(p
->subdevs
[idx
], state
);
131 if (ret
< 0 && ret
!= -ENXIO
)
139 * __fimc_pipeline_open - update the pipeline information, enable power
140 * of all pipeline subdevs and the sensor clock
141 * @me: media entity to start graph walk with
142 * @prep: true to acquire sensor (and csis) subdevs
144 * This function must be called with the graph mutex held.
146 static int __fimc_pipeline_open(struct fimc_pipeline
*p
,
147 struct media_entity
*me
, bool prep
)
152 fimc_pipeline_prepare(p
, me
);
154 if (p
->subdevs
[IDX_SENSOR
] == NULL
)
157 ret
= fimc_md_set_camclk(p
->subdevs
[IDX_SENSOR
], true);
161 return fimc_pipeline_s_power(p
, 1);
164 static int fimc_pipeline_open(struct fimc_pipeline
*p
,
165 struct media_entity
*me
, bool prep
)
169 mutex_lock(&me
->parent
->graph_mutex
);
170 ret
= __fimc_pipeline_open(p
, me
, prep
);
171 mutex_unlock(&me
->parent
->graph_mutex
);
177 * __fimc_pipeline_close - disable the sensor clock and pipeline power
178 * @fimc: fimc device terminating the pipeline
180 * Disable power of all subdevs in the pipeline and turn off the external
182 * Called with the graph mutex held.
184 static int __fimc_pipeline_close(struct fimc_pipeline
*p
)
188 if (p
->subdevs
[IDX_SENSOR
]) {
189 ret
= fimc_pipeline_s_power(p
, 0);
190 fimc_md_set_camclk(p
->subdevs
[IDX_SENSOR
], false);
192 return ret
== -ENXIO
? 0 : ret
;
195 static int fimc_pipeline_close(struct fimc_pipeline
*p
)
197 struct media_entity
*me
;
200 if (!p
|| !p
->subdevs
[IDX_SENSOR
])
203 me
= &p
->subdevs
[IDX_SENSOR
]->entity
;
204 mutex_lock(&me
->parent
->graph_mutex
);
205 ret
= __fimc_pipeline_close(p
);
206 mutex_unlock(&me
->parent
->graph_mutex
);
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
)
236 /* Media pipeline operations for the FIMC/FIMC-LITE video device driver */
237 static const struct fimc_pipeline_ops fimc_pipeline_ops
= {
238 .open
= fimc_pipeline_open
,
239 .close
= fimc_pipeline_close
,
240 .set_stream
= fimc_pipeline_s_stream
,
244 * Sensor subdevice helper functions
246 static struct v4l2_subdev
*fimc_md_register_sensor(struct fimc_md
*fmd
,
247 struct fimc_sensor_info
*s_info
)
249 struct i2c_adapter
*adapter
;
250 struct v4l2_subdev
*sd
= NULL
;
255 adapter
= i2c_get_adapter(s_info
->pdata
.i2c_bus_num
);
257 v4l2_warn(&fmd
->v4l2_dev
,
258 "Failed to get I2C adapter %d, deferring probe\n",
259 s_info
->pdata
.i2c_bus_num
);
260 return ERR_PTR(-EPROBE_DEFER
);
262 sd
= v4l2_i2c_new_subdev_board(&fmd
->v4l2_dev
, adapter
,
263 s_info
->pdata
.board_info
, NULL
);
264 if (IS_ERR_OR_NULL(sd
)) {
265 i2c_put_adapter(adapter
);
266 v4l2_warn(&fmd
->v4l2_dev
,
267 "Failed to acquire subdev %s, deferring probe\n",
268 s_info
->pdata
.board_info
->type
);
269 return ERR_PTR(-EPROBE_DEFER
);
271 v4l2_set_subdev_hostdata(sd
, s_info
);
272 sd
->grp_id
= SENSOR_GROUP_ID
;
274 v4l2_info(&fmd
->v4l2_dev
, "Registered sensor subdevice %s\n",
275 s_info
->pdata
.board_info
->type
);
279 static void fimc_md_unregister_sensor(struct v4l2_subdev
*sd
)
281 struct i2c_client
*client
= v4l2_get_subdevdata(sd
);
282 struct i2c_adapter
*adapter
;
286 v4l2_device_unregister_subdev(sd
);
287 adapter
= client
->adapter
;
288 i2c_unregister_device(client
);
290 i2c_put_adapter(adapter
);
293 static int fimc_md_register_sensor_entities(struct fimc_md
*fmd
)
295 struct s5p_platform_fimc
*pdata
= fmd
->pdev
->dev
.platform_data
;
296 struct fimc_dev
*fd
= NULL
;
297 int num_clients
, ret
, i
;
300 * Runtime resume one of the FIMC entities to make sure
301 * the sclk_cam clocks are not globally disabled.
303 for (i
= 0; !fd
&& i
< ARRAY_SIZE(fmd
->fimc
); i
++)
308 ret
= pm_runtime_get_sync(&fd
->pdev
->dev
);
312 WARN_ON(pdata
->num_clients
> ARRAY_SIZE(fmd
->sensor
));
313 num_clients
= min_t(u32
, pdata
->num_clients
, ARRAY_SIZE(fmd
->sensor
));
315 fmd
->num_sensors
= num_clients
;
316 for (i
= 0; i
< num_clients
; i
++) {
317 struct v4l2_subdev
*sd
;
319 fmd
->sensor
[i
].pdata
= pdata
->isp_info
[i
];
320 ret
= __fimc_md_set_camclk(fmd
, &fmd
->sensor
[i
], true);
323 sd
= fimc_md_register_sensor(fmd
, &fmd
->sensor
[i
]);
324 ret
= __fimc_md_set_camclk(fmd
, &fmd
->sensor
[i
], false);
327 fmd
->sensor
[i
].subdev
= sd
;
329 fmd
->sensor
[i
].subdev
= NULL
;
336 pm_runtime_put(&fd
->pdev
->dev
);
341 * MIPI CSIS and FIMC platform devices registration.
343 static int fimc_register_callback(struct device
*dev
, void *p
)
345 struct fimc_dev
*fimc
= dev_get_drvdata(dev
);
346 struct v4l2_subdev
*sd
= &fimc
->vid_cap
.subdev
;
347 struct fimc_md
*fmd
= p
;
350 if (fimc
== NULL
|| fimc
->id
>= FIMC_MAX_DEVS
)
353 sd
->grp_id
= FIMC_GROUP_ID
;
355 ret
= v4l2_device_register_subdev(&fmd
->v4l2_dev
, sd
);
357 v4l2_err(&fmd
->v4l2_dev
, "Failed to register FIMC.%d (%d)\n",
362 fimc
->pipeline_ops
= &fimc_pipeline_ops
;
363 fmd
->fimc
[fimc
->id
] = fimc
;
367 static int fimc_lite_register_callback(struct device
*dev
, void *p
)
369 struct fimc_lite
*fimc
= dev_get_drvdata(dev
);
370 struct v4l2_subdev
*sd
= &fimc
->subdev
;
371 struct fimc_md
*fmd
= p
;
374 if (fimc
== NULL
|| fimc
->index
>= FIMC_LITE_MAX_DEVS
)
377 sd
->grp_id
= FLITE_GROUP_ID
;
379 ret
= v4l2_device_register_subdev(&fmd
->v4l2_dev
, sd
);
381 v4l2_err(&fmd
->v4l2_dev
,
382 "Failed to register FIMC-LITE.%d (%d)\n",
387 fimc
->pipeline_ops
= &fimc_pipeline_ops
;
388 fmd
->fimc_lite
[fimc
->index
] = fimc
;
392 static int csis_register_callback(struct device
*dev
, void *p
)
394 struct v4l2_subdev
*sd
= dev_get_drvdata(dev
);
395 struct platform_device
*pdev
;
396 struct fimc_md
*fmd
= p
;
401 pdev
= v4l2_get_subdevdata(sd
);
402 if (!pdev
|| pdev
->id
< 0 || pdev
->id
>= CSIS_MAX_ENTITIES
)
404 v4l2_info(sd
, "csis%d sd: %s\n", pdev
->id
, sd
->name
);
406 id
= pdev
->id
< 0 ? 0 : pdev
->id
;
407 sd
->grp_id
= CSIS_GROUP_ID
;
409 ret
= v4l2_device_register_subdev(&fmd
->v4l2_dev
, sd
);
411 fmd
->csis
[id
].sd
= sd
;
413 v4l2_err(&fmd
->v4l2_dev
,
414 "Failed to register CSIS subdevice: %d\n", ret
);
419 * fimc_md_register_platform_entities - register FIMC and CSIS media entities
421 static int fimc_md_register_platform_entities(struct fimc_md
*fmd
)
423 struct s5p_platform_fimc
*pdata
= fmd
->pdev
->dev
.platform_data
;
424 struct device_driver
*driver
;
427 driver
= driver_find(FIMC_MODULE_NAME
, &platform_bus_type
);
429 v4l2_warn(&fmd
->v4l2_dev
,
430 "%s driver not found, deffering probe\n",
432 return -EPROBE_DEFER
;
435 ret
= driver_for_each_device(driver
, NULL
, fmd
,
436 fimc_register_callback
);
440 driver
= driver_find(FIMC_LITE_DRV_NAME
, &platform_bus_type
);
441 if (driver
&& try_module_get(driver
->owner
)) {
442 ret
= driver_for_each_device(driver
, NULL
, fmd
,
443 fimc_lite_register_callback
);
446 module_put(driver
->owner
);
449 * Check if there is any sensor on the MIPI-CSI2 bus and
450 * if not skip the s5p-csis module loading.
454 for (i
= 0; i
< pdata
->num_clients
; i
++) {
455 if (pdata
->isp_info
[i
].bus_type
== FIMC_MIPI_CSI2
) {
463 driver
= driver_find(CSIS_DRIVER_NAME
, &platform_bus_type
);
464 if (!driver
|| !try_module_get(driver
->owner
)) {
465 v4l2_warn(&fmd
->v4l2_dev
,
466 "%s driver not found, deffering probe\n",
468 return -EPROBE_DEFER
;
471 return driver_for_each_device(driver
, NULL
, fmd
,
472 csis_register_callback
);
475 static void fimc_md_unregister_entities(struct fimc_md
*fmd
)
479 for (i
= 0; i
< FIMC_MAX_DEVS
; i
++) {
480 if (fmd
->fimc
[i
] == NULL
)
482 v4l2_device_unregister_subdev(&fmd
->fimc
[i
]->vid_cap
.subdev
);
483 fmd
->fimc
[i
]->pipeline_ops
= NULL
;
486 for (i
= 0; i
< FIMC_LITE_MAX_DEVS
; i
++) {
487 if (fmd
->fimc_lite
[i
] == NULL
)
489 v4l2_device_unregister_subdev(&fmd
->fimc_lite
[i
]->subdev
);
490 fmd
->fimc
[i
]->pipeline_ops
= NULL
;
491 fmd
->fimc_lite
[i
] = NULL
;
493 for (i
= 0; i
< CSIS_MAX_ENTITIES
; i
++) {
494 if (fmd
->csis
[i
].sd
== NULL
)
496 v4l2_device_unregister_subdev(fmd
->csis
[i
].sd
);
497 module_put(fmd
->csis
[i
].sd
->owner
);
498 fmd
->csis
[i
].sd
= NULL
;
500 for (i
= 0; i
< fmd
->num_sensors
; i
++) {
501 if (fmd
->sensor
[i
].subdev
== NULL
)
503 fimc_md_unregister_sensor(fmd
->sensor
[i
].subdev
);
504 fmd
->sensor
[i
].subdev
= NULL
;
509 * __fimc_md_create_fimc_links - create links to all FIMC entities
510 * @fmd: fimc media device
511 * @source: the source entity to create links to all fimc entities from
512 * @sensor: sensor subdev linked to FIMC[fimc_id] entity, may be null
513 * @pad: the source entity pad index
514 * @link_mask: bitmask of the fimc devices for which link should be enabled
516 static int __fimc_md_create_fimc_sink_links(struct fimc_md
*fmd
,
517 struct media_entity
*source
,
518 struct v4l2_subdev
*sensor
,
519 int pad
, int link_mask
)
521 struct fimc_sensor_info
*s_info
;
522 struct media_entity
*sink
;
523 unsigned int flags
= 0;
526 for (i
= 0; i
< FIMC_MAX_DEVS
; i
++) {
530 * Some FIMC variants are not fitted with camera capture
531 * interface. Skip creating a link from sensor for those.
533 if (!fmd
->fimc
[i
]->variant
->has_cam_if
)
536 flags
= ((1 << i
) & link_mask
) ? MEDIA_LNK_FL_ENABLED
: 0;
538 sink
= &fmd
->fimc
[i
]->vid_cap
.subdev
.entity
;
539 ret
= media_entity_create_link(source
, pad
, sink
,
540 FIMC_SD_PAD_SINK
, flags
);
544 /* Notify FIMC capture subdev entity */
545 ret
= media_entity_call(sink
, link_setup
, &sink
->pads
[0],
546 &source
->pads
[pad
], flags
);
550 v4l2_info(&fmd
->v4l2_dev
, "created link [%s] %c> [%s]",
551 source
->name
, flags
? '=' : '-', sink
->name
);
553 if (flags
== 0 || sensor
== NULL
)
555 s_info
= v4l2_get_subdev_hostdata(sensor
);
556 if (!WARN_ON(s_info
== NULL
)) {
557 unsigned long irq_flags
;
558 spin_lock_irqsave(&fmd
->slock
, irq_flags
);
559 s_info
->host
= fmd
->fimc
[i
];
560 spin_unlock_irqrestore(&fmd
->slock
, irq_flags
);
564 for (i
= 0; i
< FIMC_LITE_MAX_DEVS
; i
++) {
565 if (!fmd
->fimc_lite
[i
])
568 if (link_mask
& (1 << (i
+ FIMC_MAX_DEVS
)))
569 flags
= MEDIA_LNK_FL_ENABLED
;
573 sink
= &fmd
->fimc_lite
[i
]->subdev
.entity
;
574 ret
= media_entity_create_link(source
, pad
, sink
,
575 FLITE_SD_PAD_SINK
, flags
);
579 /* Notify FIMC-LITE subdev entity */
580 ret
= media_entity_call(sink
, link_setup
, &sink
->pads
[0],
581 &source
->pads
[pad
], flags
);
585 v4l2_info(&fmd
->v4l2_dev
, "created link [%s] %c> [%s]",
586 source
->name
, flags
? '=' : '-', sink
->name
);
591 /* Create links from FIMC-LITE source pads to other entities */
592 static int __fimc_md_create_flite_source_links(struct fimc_md
*fmd
)
594 struct media_entity
*source
, *sink
;
595 unsigned int flags
= MEDIA_LNK_FL_ENABLED
;
598 for (i
= 0; i
< FIMC_LITE_MAX_DEVS
; i
++) {
599 struct fimc_lite
*fimc
= fmd
->fimc_lite
[i
];
602 source
= &fimc
->subdev
.entity
;
603 sink
= &fimc
->vfd
.entity
;
604 /* FIMC-LITE's subdev and video node */
605 ret
= media_entity_create_link(source
, FIMC_SD_PAD_SOURCE
,
609 /* TODO: create links to other entities */
616 * fimc_md_create_links - create default links between registered entities
618 * Parallel interface sensor entities are connected directly to FIMC capture
619 * entities. The sensors using MIPI CSIS bus are connected through immutable
620 * link with CSI receiver entity specified by mux_id. Any registered CSIS
621 * entity has a link to each registered FIMC capture entity. Enabled links
622 * are created by default between each subsequent registered sensor and
623 * subsequent FIMC capture entity. The number of default active links is
624 * determined by the number of available sensors or FIMC entities,
627 static int fimc_md_create_links(struct fimc_md
*fmd
)
629 struct v4l2_subdev
*csi_sensors
[2] = { NULL
};
630 struct v4l2_subdev
*sensor
, *csis
;
631 struct s5p_fimc_isp_info
*pdata
;
632 struct fimc_sensor_info
*s_info
;
633 struct media_entity
*source
, *sink
;
634 int i
, pad
, fimc_id
= 0, ret
= 0;
635 u32 flags
, link_mask
= 0;
637 for (i
= 0; i
< fmd
->num_sensors
; i
++) {
638 if (fmd
->sensor
[i
].subdev
== NULL
)
641 sensor
= fmd
->sensor
[i
].subdev
;
642 s_info
= v4l2_get_subdev_hostdata(sensor
);
647 pdata
= &s_info
->pdata
;
649 switch (pdata
->bus_type
) {
651 if (WARN(pdata
->mux_id
>= CSIS_MAX_ENTITIES
,
652 "Wrong CSI channel id: %d\n", pdata
->mux_id
))
655 csis
= fmd
->csis
[pdata
->mux_id
].sd
;
656 if (WARN(csis
== NULL
,
657 "MIPI-CSI interface specified "
658 "but s5p-csis module is not loaded!\n"))
661 ret
= media_entity_create_link(&sensor
->entity
, 0,
662 &csis
->entity
, CSIS_PAD_SINK
,
663 MEDIA_LNK_FL_IMMUTABLE
|
664 MEDIA_LNK_FL_ENABLED
);
668 v4l2_info(&fmd
->v4l2_dev
, "created link [%s] => [%s]",
669 sensor
->entity
.name
, csis
->entity
.name
);
672 csi_sensors
[pdata
->mux_id
] = sensor
;
675 case FIMC_ITU_601
...FIMC_ITU_656
:
676 source
= &sensor
->entity
;
681 v4l2_err(&fmd
->v4l2_dev
, "Wrong bus_type: %x\n",
688 link_mask
= 1 << fimc_id
++;
689 ret
= __fimc_md_create_fimc_sink_links(fmd
, source
, sensor
,
693 for (i
= 0; i
< ARRAY_SIZE(fmd
->csis
); i
++) {
694 if (fmd
->csis
[i
].sd
== NULL
)
696 source
= &fmd
->csis
[i
].sd
->entity
;
697 pad
= CSIS_PAD_SOURCE
;
698 sensor
= csi_sensors
[i
];
700 link_mask
= 1 << fimc_id
++;
701 ret
= __fimc_md_create_fimc_sink_links(fmd
, source
, sensor
,
705 /* Create immutable links between each FIMC's subdev and video node */
706 flags
= MEDIA_LNK_FL_IMMUTABLE
| MEDIA_LNK_FL_ENABLED
;
707 for (i
= 0; i
< FIMC_MAX_DEVS
; i
++) {
710 source
= &fmd
->fimc
[i
]->vid_cap
.subdev
.entity
;
711 sink
= &fmd
->fimc
[i
]->vid_cap
.vfd
.entity
;
712 ret
= media_entity_create_link(source
, FIMC_SD_PAD_SOURCE
,
718 return __fimc_md_create_flite_source_links(fmd
);
722 * The peripheral sensor clock management.
724 static int fimc_md_get_clocks(struct fimc_md
*fmd
)
730 for (i
= 0; i
< FIMC_MAX_CAMCLKS
; i
++) {
731 snprintf(clk_name
, sizeof(clk_name
), "sclk_cam%u", i
);
732 clock
= clk_get(NULL
, clk_name
);
733 if (IS_ERR_OR_NULL(clock
)) {
734 v4l2_err(&fmd
->v4l2_dev
, "Failed to get clock: %s",
738 fmd
->camclk
[i
].clock
= clock
;
743 static void fimc_md_put_clocks(struct fimc_md
*fmd
)
745 int i
= FIMC_MAX_CAMCLKS
;
748 if (IS_ERR_OR_NULL(fmd
->camclk
[i
].clock
))
750 clk_put(fmd
->camclk
[i
].clock
);
751 fmd
->camclk
[i
].clock
= NULL
;
755 static int __fimc_md_set_camclk(struct fimc_md
*fmd
,
756 struct fimc_sensor_info
*s_info
,
759 struct s5p_fimc_isp_info
*pdata
= &s_info
->pdata
;
760 struct fimc_camclk_info
*camclk
;
763 if (WARN_ON(pdata
->clk_id
>= FIMC_MAX_CAMCLKS
) || fmd
== NULL
)
766 camclk
= &fmd
->camclk
[pdata
->clk_id
];
768 dbg("camclk %d, f: %lu, use_count: %d, on: %d",
769 pdata
->clk_id
, pdata
->clk_frequency
, camclk
->use_count
, on
);
772 if (camclk
->use_count
> 0 &&
773 camclk
->frequency
!= pdata
->clk_frequency
)
776 if (camclk
->use_count
++ == 0) {
777 clk_set_rate(camclk
->clock
, pdata
->clk_frequency
);
778 camclk
->frequency
= pdata
->clk_frequency
;
779 ret
= clk_enable(camclk
->clock
);
780 dbg("Enabled camclk %d: f: %lu", pdata
->clk_id
,
781 clk_get_rate(camclk
->clock
));
786 if (WARN_ON(camclk
->use_count
== 0))
789 if (--camclk
->use_count
== 0) {
790 clk_disable(camclk
->clock
);
791 dbg("Disabled camclk %d", pdata
->clk_id
);
797 * fimc_md_set_camclk - peripheral sensor clock setup
798 * @sd: sensor subdev to configure sclk_cam clock for
799 * @on: 1 to enable or 0 to disable the clock
801 * There are 2 separate clock outputs available in the SoC for external
802 * image processors. These clocks are shared between all registered FIMC
803 * devices to which sensors can be attached, either directly or through
804 * the MIPI CSI receiver. The clock is allowed here to be used by
805 * multiple sensors concurrently if they use same frequency.
806 * This function should only be called when the graph mutex is held.
808 int fimc_md_set_camclk(struct v4l2_subdev
*sd
, bool on
)
810 struct fimc_sensor_info
*s_info
= v4l2_get_subdev_hostdata(sd
);
811 struct fimc_md
*fmd
= entity_to_fimc_mdev(&sd
->entity
);
813 return __fimc_md_set_camclk(fmd
, s_info
, on
);
816 static int fimc_md_link_notify(struct media_pad
*source
,
817 struct media_pad
*sink
, u32 flags
)
819 struct fimc_lite
*fimc_lite
= NULL
;
820 struct fimc_dev
*fimc
= NULL
;
821 struct fimc_pipeline
*pipeline
;
822 struct v4l2_subdev
*sd
;
825 if (media_entity_type(sink
->entity
) != MEDIA_ENT_T_V4L2_SUBDEV
)
828 sd
= media_entity_to_v4l2_subdev(sink
->entity
);
830 switch (sd
->grp_id
) {
832 fimc_lite
= v4l2_get_subdevdata(sd
);
833 pipeline
= &fimc_lite
->pipeline
;
836 fimc
= v4l2_get_subdevdata(sd
);
837 pipeline
= &fimc
->pipeline
;
843 if (!(flags
& MEDIA_LNK_FL_ENABLED
)) {
844 ret
= __fimc_pipeline_close(pipeline
);
845 pipeline
->subdevs
[IDX_SENSOR
] = NULL
;
846 pipeline
->subdevs
[IDX_CSIS
] = NULL
;
849 mutex_lock(&fimc
->lock
);
850 fimc_ctrls_delete(fimc
->vid_cap
.ctx
);
851 mutex_unlock(&fimc
->lock
);
856 * Link activation. Enable power of pipeline elements only if the
857 * pipeline is already in use, i.e. its video node is opened.
858 * Recreate the controls destroyed during the link deactivation.
861 mutex_lock(&fimc
->lock
);
862 if (fimc
->vid_cap
.refcnt
> 0) {
863 ret
= __fimc_pipeline_open(pipeline
,
864 source
->entity
, true);
866 ret
= fimc_capture_ctrls_create(fimc
);
868 mutex_unlock(&fimc
->lock
);
870 mutex_lock(&fimc_lite
->lock
);
871 if (fimc_lite
->ref_count
> 0) {
872 ret
= __fimc_pipeline_open(pipeline
,
873 source
->entity
, true);
875 mutex_unlock(&fimc_lite
->lock
);
877 return ret
? -EPIPE
: ret
;
880 static ssize_t
fimc_md_sysfs_show(struct device
*dev
,
881 struct device_attribute
*attr
, char *buf
)
883 struct platform_device
*pdev
= to_platform_device(dev
);
884 struct fimc_md
*fmd
= platform_get_drvdata(pdev
);
886 if (fmd
->user_subdev_api
)
887 return strlcpy(buf
, "Sub-device API (sub-dev)\n", PAGE_SIZE
);
889 return strlcpy(buf
, "V4L2 video node only API (vid-dev)\n", PAGE_SIZE
);
892 static ssize_t
fimc_md_sysfs_store(struct device
*dev
,
893 struct device_attribute
*attr
,
894 const char *buf
, size_t count
)
896 struct platform_device
*pdev
= to_platform_device(dev
);
897 struct fimc_md
*fmd
= platform_get_drvdata(pdev
);
901 if (!strcmp(buf
, "vid-dev\n"))
903 else if (!strcmp(buf
, "sub-dev\n"))
908 fmd
->user_subdev_api
= subdev_api
;
909 for (i
= 0; i
< FIMC_MAX_DEVS
; i
++)
911 fmd
->fimc
[i
]->vid_cap
.user_subdev_api
= subdev_api
;
915 * This device attribute is to select video pipeline configuration method.
916 * There are following valid values:
917 * vid-dev - for V4L2 video node API only, subdevice will be configured
918 * by the host driver.
919 * sub-dev - for media controller API, subdevs must be configured in user
920 * space before starting streaming.
922 static DEVICE_ATTR(subdev_conf_mode
, S_IWUSR
| S_IRUGO
,
923 fimc_md_sysfs_show
, fimc_md_sysfs_store
);
925 static int fimc_md_probe(struct platform_device
*pdev
)
927 struct v4l2_device
*v4l2_dev
;
931 fmd
= devm_kzalloc(&pdev
->dev
, sizeof(*fmd
), GFP_KERNEL
);
935 spin_lock_init(&fmd
->slock
);
938 strlcpy(fmd
->media_dev
.model
, "SAMSUNG S5P FIMC",
939 sizeof(fmd
->media_dev
.model
));
940 fmd
->media_dev
.link_notify
= fimc_md_link_notify
;
941 fmd
->media_dev
.dev
= &pdev
->dev
;
943 v4l2_dev
= &fmd
->v4l2_dev
;
944 v4l2_dev
->mdev
= &fmd
->media_dev
;
945 v4l2_dev
->notify
= fimc_sensor_notify
;
946 snprintf(v4l2_dev
->name
, sizeof(v4l2_dev
->name
), "%s",
947 dev_name(&pdev
->dev
));
949 ret
= v4l2_device_register(&pdev
->dev
, &fmd
->v4l2_dev
);
951 v4l2_err(v4l2_dev
, "Failed to register v4l2_device: %d\n", ret
);
954 ret
= media_device_register(&fmd
->media_dev
);
956 v4l2_err(v4l2_dev
, "Failed to register media device: %d\n", ret
);
959 ret
= fimc_md_get_clocks(fmd
);
963 fmd
->user_subdev_api
= false;
965 /* Protect the media graph while we're registering entities */
966 mutex_lock(&fmd
->media_dev
.graph_mutex
);
968 ret
= fimc_md_register_platform_entities(fmd
);
972 if (pdev
->dev
.platform_data
) {
973 ret
= fimc_md_register_sensor_entities(fmd
);
977 ret
= fimc_md_create_links(fmd
);
980 ret
= v4l2_device_register_subdev_nodes(&fmd
->v4l2_dev
);
984 ret
= device_create_file(&pdev
->dev
, &dev_attr_subdev_conf_mode
);
988 platform_set_drvdata(pdev
, fmd
);
989 mutex_unlock(&fmd
->media_dev
.graph_mutex
);
993 mutex_unlock(&fmd
->media_dev
.graph_mutex
);
995 media_device_unregister(&fmd
->media_dev
);
996 fimc_md_put_clocks(fmd
);
997 fimc_md_unregister_entities(fmd
);
999 v4l2_device_unregister(&fmd
->v4l2_dev
);
1003 static int __devexit
fimc_md_remove(struct platform_device
*pdev
)
1005 struct fimc_md
*fmd
= platform_get_drvdata(pdev
);
1009 device_remove_file(&pdev
->dev
, &dev_attr_subdev_conf_mode
);
1010 fimc_md_unregister_entities(fmd
);
1011 media_device_unregister(&fmd
->media_dev
);
1012 fimc_md_put_clocks(fmd
);
1016 static struct platform_driver fimc_md_driver
= {
1017 .probe
= fimc_md_probe
,
1018 .remove
= __devexit_p(fimc_md_remove
),
1020 .name
= "s5p-fimc-md",
1021 .owner
= THIS_MODULE
,
1025 static int __init
fimc_md_init(void)
1029 request_module("s5p-csis");
1030 ret
= fimc_register_driver();
1034 return platform_driver_register(&fimc_md_driver
);
1037 static void __exit
fimc_md_exit(void)
1039 platform_driver_unregister(&fimc_md_driver
);
1040 fimc_unregister_driver();
1043 module_init(fimc_md_init
);
1044 module_exit(fimc_md_exit
);
1046 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
1047 MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver");
1048 MODULE_LICENSE("GPL");
1049 MODULE_VERSION("2.0.1");