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 static 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
*csi_sensors
[2] = { NULL
};
621 struct v4l2_subdev
*sensor
, *csis
;
622 struct s5p_fimc_isp_info
*pdata
;
623 struct fimc_sensor_info
*s_info
;
624 struct media_entity
*source
, *sink
;
625 int i
, pad
, fimc_id
= 0, ret
= 0;
626 u32 flags
, link_mask
= 0;
628 for (i
= 0; i
< fmd
->num_sensors
; i
++) {
629 if (fmd
->sensor
[i
].subdev
== NULL
)
632 sensor
= fmd
->sensor
[i
].subdev
;
633 s_info
= v4l2_get_subdev_hostdata(sensor
);
634 if (!s_info
|| !s_info
->pdata
)
638 pdata
= s_info
->pdata
;
640 switch (pdata
->bus_type
) {
642 if (WARN(pdata
->mux_id
>= CSIS_MAX_ENTITIES
,
643 "Wrong CSI channel id: %d\n", pdata
->mux_id
))
646 csis
= fmd
->csis
[pdata
->mux_id
].sd
;
647 if (WARN(csis
== NULL
,
648 "MIPI-CSI interface specified "
649 "but s5p-csis module is not loaded!\n"))
652 ret
= media_entity_create_link(&sensor
->entity
, 0,
653 &csis
->entity
, CSIS_PAD_SINK
,
654 MEDIA_LNK_FL_IMMUTABLE
|
655 MEDIA_LNK_FL_ENABLED
);
659 v4l2_info(&fmd
->v4l2_dev
, "created link [%s] => [%s]",
660 sensor
->entity
.name
, csis
->entity
.name
);
663 csi_sensors
[pdata
->mux_id
] = sensor
;
666 case FIMC_ITU_601
...FIMC_ITU_656
:
667 source
= &sensor
->entity
;
672 v4l2_err(&fmd
->v4l2_dev
, "Wrong bus_type: %x\n",
679 link_mask
= 1 << fimc_id
++;
680 ret
= __fimc_md_create_fimc_sink_links(fmd
, source
, sensor
,
684 for (i
= 0; i
< ARRAY_SIZE(fmd
->csis
); i
++) {
685 if (fmd
->csis
[i
].sd
== NULL
)
687 source
= &fmd
->csis
[i
].sd
->entity
;
688 pad
= CSIS_PAD_SOURCE
;
689 sensor
= csi_sensors
[i
];
691 link_mask
= 1 << fimc_id
++;
692 ret
= __fimc_md_create_fimc_sink_links(fmd
, source
, sensor
,
696 /* Create immutable links between each FIMC's subdev and video node */
697 flags
= MEDIA_LNK_FL_IMMUTABLE
| MEDIA_LNK_FL_ENABLED
;
698 for (i
= 0; i
< FIMC_MAX_DEVS
; i
++) {
701 source
= &fmd
->fimc
[i
]->vid_cap
.subdev
.entity
;
702 sink
= &fmd
->fimc
[i
]->vid_cap
.vfd
.entity
;
703 ret
= media_entity_create_link(source
, FIMC_SD_PAD_SOURCE
,
709 return __fimc_md_create_flite_source_links(fmd
);
713 * The peripheral sensor clock management.
715 static int fimc_md_get_clocks(struct fimc_md
*fmd
)
721 for (i
= 0; i
< FIMC_MAX_CAMCLKS
; i
++) {
722 snprintf(clk_name
, sizeof(clk_name
), "sclk_cam%u", i
);
723 clock
= clk_get(NULL
, clk_name
);
724 if (IS_ERR_OR_NULL(clock
)) {
725 v4l2_err(&fmd
->v4l2_dev
, "Failed to get clock: %s",
729 fmd
->camclk
[i
].clock
= clock
;
734 static void fimc_md_put_clocks(struct fimc_md
*fmd
)
736 int i
= FIMC_MAX_CAMCLKS
;
739 if (IS_ERR_OR_NULL(fmd
->camclk
[i
].clock
))
741 clk_put(fmd
->camclk
[i
].clock
);
742 fmd
->camclk
[i
].clock
= NULL
;
746 static int __fimc_md_set_camclk(struct fimc_md
*fmd
,
747 struct fimc_sensor_info
*s_info
,
750 struct s5p_fimc_isp_info
*pdata
= s_info
->pdata
;
751 struct fimc_camclk_info
*camclk
;
754 if (WARN_ON(pdata
->clk_id
>= FIMC_MAX_CAMCLKS
) || fmd
== NULL
)
757 camclk
= &fmd
->camclk
[pdata
->clk_id
];
759 dbg("camclk %d, f: %lu, use_count: %d, on: %d",
760 pdata
->clk_id
, pdata
->clk_frequency
, camclk
->use_count
, on
);
763 if (camclk
->use_count
> 0 &&
764 camclk
->frequency
!= pdata
->clk_frequency
)
767 if (camclk
->use_count
++ == 0) {
768 clk_set_rate(camclk
->clock
, pdata
->clk_frequency
);
769 camclk
->frequency
= pdata
->clk_frequency
;
770 ret
= clk_enable(camclk
->clock
);
771 dbg("Enabled camclk %d: f: %lu", pdata
->clk_id
,
772 clk_get_rate(camclk
->clock
));
777 if (WARN_ON(camclk
->use_count
== 0))
780 if (--camclk
->use_count
== 0) {
781 clk_disable(camclk
->clock
);
782 dbg("Disabled camclk %d", pdata
->clk_id
);
788 * fimc_md_set_camclk - peripheral sensor clock setup
789 * @sd: sensor subdev to configure sclk_cam clock for
790 * @on: 1 to enable or 0 to disable the clock
792 * There are 2 separate clock outputs available in the SoC for external
793 * image processors. These clocks are shared between all registered FIMC
794 * devices to which sensors can be attached, either directly or through
795 * the MIPI CSI receiver. The clock is allowed here to be used by
796 * multiple sensors concurrently if they use same frequency.
797 * This function should only be called when the graph mutex is held.
799 int fimc_md_set_camclk(struct v4l2_subdev
*sd
, bool on
)
801 struct fimc_sensor_info
*s_info
= v4l2_get_subdev_hostdata(sd
);
802 struct fimc_md
*fmd
= entity_to_fimc_mdev(&sd
->entity
);
804 return __fimc_md_set_camclk(fmd
, s_info
, on
);
807 static int fimc_md_link_notify(struct media_pad
*source
,
808 struct media_pad
*sink
, u32 flags
)
810 struct fimc_lite
*fimc_lite
= NULL
;
811 struct fimc_dev
*fimc
= NULL
;
812 struct fimc_pipeline
*pipeline
;
813 struct v4l2_subdev
*sd
;
816 if (media_entity_type(sink
->entity
) != MEDIA_ENT_T_V4L2_SUBDEV
)
819 sd
= media_entity_to_v4l2_subdev(sink
->entity
);
821 switch (sd
->grp_id
) {
823 fimc_lite
= v4l2_get_subdevdata(sd
);
824 pipeline
= &fimc_lite
->pipeline
;
827 fimc
= v4l2_get_subdevdata(sd
);
828 pipeline
= &fimc
->pipeline
;
834 if (!(flags
& MEDIA_LNK_FL_ENABLED
)) {
835 ret
= __fimc_pipeline_shutdown(pipeline
);
836 pipeline
->subdevs
[IDX_SENSOR
] = NULL
;
837 pipeline
->subdevs
[IDX_CSIS
] = NULL
;
840 mutex_lock(&fimc
->lock
);
841 fimc_ctrls_delete(fimc
->vid_cap
.ctx
);
842 mutex_unlock(&fimc
->lock
);
847 * Link activation. Enable power of pipeline elements only if the
848 * pipeline is already in use, i.e. its video node is opened.
849 * Recreate the controls destroyed during the link deactivation.
852 mutex_lock(&fimc
->lock
);
853 if (fimc
->vid_cap
.refcnt
> 0) {
854 ret
= __fimc_pipeline_initialize(pipeline
,
855 source
->entity
, true);
857 ret
= fimc_capture_ctrls_create(fimc
);
859 mutex_unlock(&fimc
->lock
);
861 mutex_lock(&fimc_lite
->lock
);
862 if (fimc_lite
->ref_count
> 0) {
863 ret
= __fimc_pipeline_initialize(pipeline
,
864 source
->entity
, true);
866 mutex_unlock(&fimc_lite
->lock
);
868 return ret
? -EPIPE
: ret
;
871 static ssize_t
fimc_md_sysfs_show(struct device
*dev
,
872 struct device_attribute
*attr
, char *buf
)
874 struct platform_device
*pdev
= to_platform_device(dev
);
875 struct fimc_md
*fmd
= platform_get_drvdata(pdev
);
877 if (fmd
->user_subdev_api
)
878 return strlcpy(buf
, "Sub-device API (sub-dev)\n", PAGE_SIZE
);
880 return strlcpy(buf
, "V4L2 video node only API (vid-dev)\n", PAGE_SIZE
);
883 static ssize_t
fimc_md_sysfs_store(struct device
*dev
,
884 struct device_attribute
*attr
,
885 const char *buf
, size_t count
)
887 struct platform_device
*pdev
= to_platform_device(dev
);
888 struct fimc_md
*fmd
= platform_get_drvdata(pdev
);
892 if (!strcmp(buf
, "vid-dev\n"))
894 else if (!strcmp(buf
, "sub-dev\n"))
899 fmd
->user_subdev_api
= subdev_api
;
900 for (i
= 0; i
< FIMC_MAX_DEVS
; i
++)
902 fmd
->fimc
[i
]->vid_cap
.user_subdev_api
= subdev_api
;
906 * This device attribute is to select video pipeline configuration method.
907 * There are following valid values:
908 * vid-dev - for V4L2 video node API only, subdevice will be configured
909 * by the host driver.
910 * sub-dev - for media controller API, subdevs must be configured in user
911 * space before starting streaming.
913 static DEVICE_ATTR(subdev_conf_mode
, S_IWUSR
| S_IRUGO
,
914 fimc_md_sysfs_show
, fimc_md_sysfs_store
);
916 static int fimc_md_probe(struct platform_device
*pdev
)
918 struct v4l2_device
*v4l2_dev
;
922 fmd
= devm_kzalloc(&pdev
->dev
, sizeof(*fmd
), GFP_KERNEL
);
926 spin_lock_init(&fmd
->slock
);
929 strlcpy(fmd
->media_dev
.model
, "SAMSUNG S5P FIMC",
930 sizeof(fmd
->media_dev
.model
));
931 fmd
->media_dev
.link_notify
= fimc_md_link_notify
;
932 fmd
->media_dev
.dev
= &pdev
->dev
;
934 v4l2_dev
= &fmd
->v4l2_dev
;
935 v4l2_dev
->mdev
= &fmd
->media_dev
;
936 v4l2_dev
->notify
= fimc_sensor_notify
;
937 snprintf(v4l2_dev
->name
, sizeof(v4l2_dev
->name
), "%s",
938 dev_name(&pdev
->dev
));
940 ret
= v4l2_device_register(&pdev
->dev
, &fmd
->v4l2_dev
);
942 v4l2_err(v4l2_dev
, "Failed to register v4l2_device: %d\n", ret
);
945 ret
= media_device_register(&fmd
->media_dev
);
947 v4l2_err(v4l2_dev
, "Failed to register media device: %d\n", ret
);
950 ret
= fimc_md_get_clocks(fmd
);
954 fmd
->user_subdev_api
= false;
956 /* Protect the media graph while we're registering entities */
957 mutex_lock(&fmd
->media_dev
.graph_mutex
);
959 ret
= fimc_md_register_platform_entities(fmd
);
963 if (pdev
->dev
.platform_data
) {
964 ret
= fimc_md_register_sensor_entities(fmd
);
968 ret
= fimc_md_create_links(fmd
);
971 ret
= v4l2_device_register_subdev_nodes(&fmd
->v4l2_dev
);
975 ret
= device_create_file(&pdev
->dev
, &dev_attr_subdev_conf_mode
);
979 platform_set_drvdata(pdev
, fmd
);
980 mutex_unlock(&fmd
->media_dev
.graph_mutex
);
984 mutex_unlock(&fmd
->media_dev
.graph_mutex
);
986 media_device_unregister(&fmd
->media_dev
);
987 fimc_md_put_clocks(fmd
);
988 fimc_md_unregister_entities(fmd
);
990 v4l2_device_unregister(&fmd
->v4l2_dev
);
994 static int __devexit
fimc_md_remove(struct platform_device
*pdev
)
996 struct fimc_md
*fmd
= platform_get_drvdata(pdev
);
1000 device_remove_file(&pdev
->dev
, &dev_attr_subdev_conf_mode
);
1001 fimc_md_unregister_entities(fmd
);
1002 media_device_unregister(&fmd
->media_dev
);
1003 fimc_md_put_clocks(fmd
);
1007 static struct platform_driver fimc_md_driver
= {
1008 .probe
= fimc_md_probe
,
1009 .remove
= __devexit_p(fimc_md_remove
),
1011 .name
= "s5p-fimc-md",
1012 .owner
= THIS_MODULE
,
1016 static int __init
fimc_md_init(void)
1020 request_module("s5p-csis");
1021 ret
= fimc_register_driver();
1025 return platform_driver_register(&fimc_md_driver
);
1028 static void __exit
fimc_md_exit(void)
1030 platform_driver_unregister(&fimc_md_driver
);
1031 fimc_unregister_driver();
1034 module_init(fimc_md_init
);
1035 module_exit(fimc_md_exit
);
1037 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
1038 MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver");
1039 MODULE_LICENSE("GPL");
1040 MODULE_VERSION("2.0.1");