linux/drivers/media/video/s5p-fimc/fimc-mdevice.c

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/*
* S5P/EXYNOS4 SoC series camera host interface media device driver
*
* Copyright (C) 2011 Samsung Electronics Co., Ltd.
* Contact: Sylwester Nawrocki, <s.nawrocki@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation, either version 2 of the License,
* or (at your option) any later version.
*/
#include <linux/bug.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <media/v4l2-ctrls.h>
#include <media/media-device.h>
#include "fimc-core.h"
#include "fimc-lite.h"
#include "fimc-mdevice.h"
#include "mipi-csis.h"
static int __fimc_md_set_camclk(struct fimc_md *fmd,
struct fimc_sensor_info *s_info,
bool on);
/**
* fimc_pipeline_prepare - update pipeline information with subdevice pointers
* @fimc: fimc device terminating the pipeline
*
* Caller holds the graph mutex.
*/
void fimc_pipeline_prepare(struct fimc_pipeline *p, struct media_entity *me)
{
struct media_pad *pad = &me->pads[0];
struct v4l2_subdev *sd;
int i;
for (i = 0; i < IDX_MAX; i++)
p->subdevs[i] = NULL;
while (1) {
if (!(pad->flags & MEDIA_PAD_FL_SINK))
break;
/* source pad */
pad = media_entity_remote_source(pad);
if (pad == NULL ||
media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
break;
sd = media_entity_to_v4l2_subdev(pad->entity);
switch (sd->grp_id) {
case SENSOR_GROUP_ID:
p->subdevs[IDX_SENSOR] = sd;
break;
case CSIS_GROUP_ID:
p->subdevs[IDX_CSIS] = sd;
break;
case FLITE_GROUP_ID:
p->subdevs[IDX_FLITE] = sd;
break;
case FIMC_GROUP_ID:
/* No need to control FIMC subdev through subdev ops */
break;
default:
pr_warn("%s: Unknown subdev grp_id: %#x\n",
__func__, sd->grp_id);
}
/* sink pad */
pad = &sd->entity.pads[0];
}
}
/**
* __subdev_set_power - change power state of a single subdev
* @sd: subdevice to change power state for
* @on: 1 to enable power or 0 to disable
*
* Return result of s_power subdev operation or -ENXIO if sd argument
* is NULL. Return 0 if the subdevice does not implement s_power.
*/
static int __subdev_set_power(struct v4l2_subdev *sd, int on)
{
int *use_count;
int ret;
if (sd == NULL)
return -ENXIO;
use_count = &sd->entity.use_count;
if (on && (*use_count)++ > 0)
return 0;
else if (!on && (*use_count == 0 || --(*use_count) > 0))
return 0;
ret = v4l2_subdev_call(sd, core, s_power, on);
return ret != -ENOIOCTLCMD ? ret : 0;
}
/**
* fimc_pipeline_s_power - change power state of all pipeline subdevs
* @fimc: fimc device terminating the pipeline
* @state: true to power on, false to power off
*
* Needs to be called with the graph mutex held.
*/
int fimc_pipeline_s_power(struct fimc_pipeline *p, bool state)
{
unsigned int i;
int ret;
if (p->subdevs[IDX_SENSOR] == NULL)
return -ENXIO;
for (i = 0; i < IDX_MAX; i++) {
unsigned int idx = state ? (IDX_MAX - 1) - i : i;
ret = __subdev_set_power(p->subdevs[idx], state);
if (ret < 0 && ret != -ENXIO)
return ret;
}
return 0;
}
/**
* __fimc_pipeline_initialize - update the pipeline information, enable power
* of all pipeline subdevs and the sensor clock
* @me: media entity to start graph walk with
* @prep: true to acquire sensor (and csis) subdevs
*
* This function must be called with the graph mutex held.
*/
static int __fimc_pipeline_initialize(struct fimc_pipeline *p,
struct media_entity *me, bool prep)
{
int ret;
if (prep)
fimc_pipeline_prepare(p, me);
if (p->subdevs[IDX_SENSOR] == NULL)
return -EINVAL;
ret = fimc_md_set_camclk(p->subdevs[IDX_SENSOR], true);
if (ret)
return ret;
return fimc_pipeline_s_power(p, 1);
}
int fimc_pipeline_initialize(struct fimc_pipeline *p, struct media_entity *me,
bool prep)
{
int ret;
mutex_lock(&me->parent->graph_mutex);
ret = __fimc_pipeline_initialize(p, me, prep);
mutex_unlock(&me->parent->graph_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(fimc_pipeline_initialize);
/**
* __fimc_pipeline_shutdown - disable the sensor clock and pipeline power
* @fimc: fimc device terminating the pipeline
*
* Disable power of all subdevs in the pipeline and turn off the external
* sensor clock.
* Called with the graph mutex held.
*/
int __fimc_pipeline_shutdown(struct fimc_pipeline *p)
{
int ret = 0;
if (p->subdevs[IDX_SENSOR]) {
ret = fimc_pipeline_s_power(p, 0);
fimc_md_set_camclk(p->subdevs[IDX_SENSOR], false);
}
return ret == -ENXIO ? 0 : ret;
}
int fimc_pipeline_shutdown(struct fimc_pipeline *p)
{
struct media_entity *me;
int ret;
if (!p || !p->subdevs[IDX_SENSOR])
return -EINVAL;
me = &p->subdevs[IDX_SENSOR]->entity;
mutex_lock(&me->parent->graph_mutex);
ret = __fimc_pipeline_shutdown(p);
mutex_unlock(&me->parent->graph_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(fimc_pipeline_shutdown);
/**
* fimc_pipeline_s_stream - invoke s_stream on pipeline subdevs
* @pipeline: video pipeline structure
* @on: passed as the s_stream call argument
*/
int fimc_pipeline_s_stream(struct fimc_pipeline *p, bool on)
{
int i, ret;
if (p->subdevs[IDX_SENSOR] == NULL)
return -ENODEV;
for (i = 0; i < IDX_MAX; i++) {
unsigned int idx = on ? (IDX_MAX - 1) - i : i;
ret = v4l2_subdev_call(p->subdevs[idx], video, s_stream, on);
if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(fimc_pipeline_s_stream);
/*
* Sensor subdevice helper functions
*/
static struct v4l2_subdev *fimc_md_register_sensor(struct fimc_md *fmd,
struct fimc_sensor_info *s_info)
{
struct i2c_adapter *adapter;
struct v4l2_subdev *sd = NULL;
if (!s_info || !fmd)
return NULL;
adapter = i2c_get_adapter(s_info->pdata->i2c_bus_num);
if (!adapter) {
v4l2_warn(&fmd->v4l2_dev,
"Failed to get I2C adapter %d, deferring probe\n",
s_info->pdata->i2c_bus_num);
return ERR_PTR(-EPROBE_DEFER);
}
sd = v4l2_i2c_new_subdev_board(&fmd->v4l2_dev, adapter,
s_info->pdata->board_info, NULL);
if (IS_ERR_OR_NULL(sd)) {
i2c_put_adapter(adapter);
v4l2_warn(&fmd->v4l2_dev,
"Failed to acquire subdev %s, deferring probe\n",
s_info->pdata->board_info->type);
return ERR_PTR(-EPROBE_DEFER);
}
v4l2_set_subdev_hostdata(sd, s_info);
sd->grp_id = SENSOR_GROUP_ID;
v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice %s\n",
s_info->pdata->board_info->type);
return sd;
}
static void fimc_md_unregister_sensor(struct v4l2_subdev *sd)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct i2c_adapter *adapter;
if (!client)
return;
v4l2_device_unregister_subdev(sd);
adapter = client->adapter;
i2c_unregister_device(client);
if (adapter)
i2c_put_adapter(adapter);
}
static int fimc_md_register_sensor_entities(struct fimc_md *fmd)
{
struct s5p_platform_fimc *pdata = fmd->pdev->dev.platform_data;
struct fimc_dev *fd = NULL;
int num_clients, ret, i;
/*
* Runtime resume one of the FIMC entities to make sure
* the sclk_cam clocks are not globally disabled.
*/
for (i = 0; !fd && i < ARRAY_SIZE(fmd->fimc); i++)
if (fmd->fimc[i])
fd = fmd->fimc[i];
if (!fd)
return -ENXIO;
ret = pm_runtime_get_sync(&fd->pdev->dev);
if (ret < 0)
return ret;
WARN_ON(pdata->num_clients > ARRAY_SIZE(fmd->sensor));
num_clients = min_t(u32, pdata->num_clients, ARRAY_SIZE(fmd->sensor));
fmd->num_sensors = num_clients;
for (i = 0; i < num_clients; i++) {
struct v4l2_subdev *sd;
fmd->sensor[i].pdata = &pdata->isp_info[i];
ret = __fimc_md_set_camclk(fmd, &fmd->sensor[i], true);
if (ret)
break;
sd = fimc_md_register_sensor(fmd, &fmd->sensor[i]);
ret = __fimc_md_set_camclk(fmd, &fmd->sensor[i], false);
if (!IS_ERR(sd)) {
fmd->sensor[i].subdev = sd;
} else {
fmd->sensor[i].subdev = NULL;
ret = PTR_ERR(sd);
break;
}
if (ret)
break;
}
pm_runtime_put(&fd->pdev->dev);
return ret;
}
/*
* MIPI CSIS and FIMC platform devices registration.
*/
static int fimc_register_callback(struct device *dev, void *p)
{
struct fimc_dev *fimc = dev_get_drvdata(dev);
struct v4l2_subdev *sd = &fimc->vid_cap.subdev;
struct fimc_md *fmd = p;
int ret = 0;
if (!fimc || !fimc->pdev)
return 0;
if (fimc->pdev->id < 0 || fimc->pdev->id >= FIMC_MAX_DEVS)
return 0;
fmd->fimc[fimc->pdev->id] = fimc;
sd->grp_id = FIMC_GROUP_ID;
ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
if (ret) {
v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.%d (%d)\n",
fimc->id, ret);
}
return ret;
}
static int fimc_lite_register_callback(struct device *dev, void *p)
{
struct fimc_lite *fimc = dev_get_drvdata(dev);
struct v4l2_subdev *sd = &fimc->subdev;
struct fimc_md *fmd = p;
int ret;
if (fimc == NULL)
return 0;
if (fimc->index >= FIMC_LITE_MAX_DEVS)
return 0;
fmd->fimc_lite[fimc->index] = fimc;
sd->grp_id = FLITE_GROUP_ID;
ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
if (ret) {
v4l2_err(&fmd->v4l2_dev,
"Failed to register FIMC-LITE.%d (%d)\n",
fimc->index, ret);
}
return ret;
}
static int csis_register_callback(struct device *dev, void *p)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct platform_device *pdev;
struct fimc_md *fmd = p;
int id, ret;
if (!sd)
return 0;
pdev = v4l2_get_subdevdata(sd);
if (!pdev || pdev->id < 0 || pdev->id >= CSIS_MAX_ENTITIES)
return 0;
v4l2_info(sd, "csis%d sd: %s\n", pdev->id, sd->name);
id = pdev->id < 0 ? 0 : pdev->id;
fmd->csis[id].sd = sd;
sd->grp_id = CSIS_GROUP_ID;
ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
if (ret)
v4l2_err(&fmd->v4l2_dev,
"Failed to register CSIS subdevice: %d\n", ret);
return ret;
}
/**
* fimc_md_register_platform_entities - register FIMC and CSIS media entities
*/
static int fimc_md_register_platform_entities(struct fimc_md *fmd)
{
struct s5p_platform_fimc *pdata = fmd->pdev->dev.platform_data;
struct device_driver *driver;
int ret, i;
driver = driver_find(FIMC_MODULE_NAME, &platform_bus_type);
if (!driver) {
v4l2_warn(&fmd->v4l2_dev,
"%s driver not found, deffering probe\n",
FIMC_MODULE_NAME);
return -EPROBE_DEFER;
}
ret = driver_for_each_device(driver, NULL, fmd,
fimc_register_callback);
if (ret)
return ret;
driver = driver_find(FIMC_LITE_DRV_NAME, &platform_bus_type);
if (driver && try_module_get(driver->owner)) {
ret = driver_for_each_device(driver, NULL, fmd,
fimc_lite_register_callback);
if (ret)
return ret;
module_put(driver->owner);
}
/*
* Check if there is any sensor on the MIPI-CSI2 bus and
* if not skip the s5p-csis module loading.
*/
if (pdata == NULL)
return 0;
for (i = 0; i < pdata->num_clients; i++) {
if (pdata->isp_info[i].bus_type == FIMC_MIPI_CSI2) {
ret = 1;
break;
}
}
if (!ret)
return 0;
driver = driver_find(CSIS_DRIVER_NAME, &platform_bus_type);
if (!driver || !try_module_get(driver->owner)) {
v4l2_warn(&fmd->v4l2_dev,
"%s driver not found, deffering probe\n",
CSIS_DRIVER_NAME);
return -EPROBE_DEFER;
}
return driver_for_each_device(driver, NULL, fmd,
csis_register_callback);
}
static void fimc_md_unregister_entities(struct fimc_md *fmd)
{
int i;
for (i = 0; i < FIMC_MAX_DEVS; i++) {
if (fmd->fimc[i] == NULL)
continue;
v4l2_device_unregister_subdev(&fmd->fimc[i]->vid_cap.subdev);
fmd->fimc[i] = NULL;
}
for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
if (fmd->fimc_lite[i] == NULL)
continue;
v4l2_device_unregister_subdev(&fmd->fimc_lite[i]->subdev);
fmd->fimc_lite[i] = NULL;
}
for (i = 0; i < CSIS_MAX_ENTITIES; i++) {
if (fmd->csis[i].sd == NULL)
continue;
v4l2_device_unregister_subdev(fmd->csis[i].sd);
module_put(fmd->csis[i].sd->owner);
fmd->csis[i].sd = NULL;
}
for (i = 0; i < fmd->num_sensors; i++) {
if (fmd->sensor[i].subdev == NULL)
continue;
fimc_md_unregister_sensor(fmd->sensor[i].subdev);
fmd->sensor[i].subdev = NULL;
}
}
/**
* __fimc_md_create_fimc_links - create links to all FIMC entities
* @fmd: fimc media device
* @source: the source entity to create links to all fimc entities from
* @sensor: sensor subdev linked to FIMC[fimc_id] entity, may be null
* @pad: the source entity pad index
* @link_mask: bitmask of the fimc devices for which link should be enabled
*/
static int __fimc_md_create_fimc_sink_links(struct fimc_md *fmd,
struct media_entity *source,
struct v4l2_subdev *sensor,
int pad, int link_mask)
{
struct fimc_sensor_info *s_info;
struct media_entity *sink;
unsigned int flags = 0;
int ret, i;
for (i = 0; i < FIMC_MAX_DEVS; i++) {
if (!fmd->fimc[i])
continue;
/*
* Some FIMC variants are not fitted with camera capture
* interface. Skip creating a link from sensor for those.
*/
if (!fmd->fimc[i]->variant->has_cam_if)
continue;
flags = ((1 << i) & link_mask) ? MEDIA_LNK_FL_ENABLED : 0;
sink = &fmd->fimc[i]->vid_cap.subdev.entity;
ret = media_entity_create_link(source, pad, sink,
FIMC_SD_PAD_SINK, flags);
if (ret)
return ret;
/* Notify FIMC capture subdev entity */
ret = media_entity_call(sink, link_setup, &sink->pads[0],
&source->pads[pad], flags);
if (ret)
break;
v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]",
source->name, flags ? '=' : '-', sink->name);
if (flags == 0 || sensor == NULL)
continue;
s_info = v4l2_get_subdev_hostdata(sensor);
if (!WARN_ON(s_info == NULL)) {
unsigned long irq_flags;
spin_lock_irqsave(&fmd->slock, irq_flags);
s_info->host = fmd->fimc[i];
spin_unlock_irqrestore(&fmd->slock, irq_flags);
}
}
for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
if (!fmd->fimc_lite[i])
continue;
if (link_mask & (1 << (i + FIMC_MAX_DEVS)))
flags = MEDIA_LNK_FL_ENABLED;
else
flags = 0;
sink = &fmd->fimc_lite[i]->subdev.entity;
ret = media_entity_create_link(source, pad, sink,
FLITE_SD_PAD_SINK, flags);
if (ret)
return ret;
/* Notify FIMC-LITE subdev entity */
ret = media_entity_call(sink, link_setup, &sink->pads[0],
&source->pads[pad], flags);
if (ret)
break;
v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]",
source->name, flags ? '=' : '-', sink->name);
}
return 0;
}
/* Create links from FIMC-LITE source pads to other entities */
static int __fimc_md_create_flite_source_links(struct fimc_md *fmd)
{
struct media_entity *source, *sink;
unsigned int flags = MEDIA_LNK_FL_ENABLED;
int i, ret;
for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
struct fimc_lite *fimc = fmd->fimc_lite[i];
if (fimc == NULL)
continue;
source = &fimc->subdev.entity;
sink = &fimc->vfd->entity;
/* FIMC-LITE's subdev and video node */
ret = media_entity_create_link(source, FIMC_SD_PAD_SOURCE,
sink, 0, flags);
if (ret)
break;
/* TODO: create links to other entities */
}
return ret;
}
/**
* fimc_md_create_links - create default links between registered entities
*
* Parallel interface sensor entities are connected directly to FIMC capture
* entities. The sensors using MIPI CSIS bus are connected through immutable
* link with CSI receiver entity specified by mux_id. Any registered CSIS
* entity has a link to each registered FIMC capture entity. Enabled links
* are created by default between each subsequent registered sensor and
* subsequent FIMC capture entity. The number of default active links is
* determined by the number of available sensors or FIMC entities,
* whichever is less.
*/
static int fimc_md_create_links(struct fimc_md *fmd)
{
struct v4l2_subdev *sensor, *csis;
struct s5p_fimc_isp_info *pdata;
struct fimc_sensor_info *s_info;
struct media_entity *source, *sink;
int i, pad, fimc_id = 0, ret = 0;
u32 flags, link_mask = 0;
for (i = 0; i < fmd->num_sensors; i++) {
if (fmd->sensor[i].subdev == NULL)
continue;
sensor = fmd->sensor[i].subdev;
s_info = v4l2_get_subdev_hostdata(sensor);
if (!s_info || !s_info->pdata)
continue;
source = NULL;
pdata = s_info->pdata;
switch (pdata->bus_type) {
case FIMC_MIPI_CSI2:
if (WARN(pdata->mux_id >= CSIS_MAX_ENTITIES,
"Wrong CSI channel id: %d\n", pdata->mux_id))
return -EINVAL;
csis = fmd->csis[pdata->mux_id].sd;
if (WARN(csis == NULL,
"MIPI-CSI interface specified "
"but s5p-csis module is not loaded!\n"))
return -EINVAL;
ret = media_entity_create_link(&sensor->entity, 0,
&csis->entity, CSIS_PAD_SINK,
MEDIA_LNK_FL_IMMUTABLE |
MEDIA_LNK_FL_ENABLED);
if (ret)
return ret;
v4l2_info(&fmd->v4l2_dev, "created link [%s] => [%s]",
sensor->entity.name, csis->entity.name);
source = NULL;
break;
case FIMC_ITU_601...FIMC_ITU_656:
source = &sensor->entity;
pad = 0;
break;
default:
v4l2_err(&fmd->v4l2_dev, "Wrong bus_type: %x\n",
pdata->bus_type);
return -EINVAL;
}
if (source == NULL)
continue;
link_mask = 1 << fimc_id++;
ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor,
pad, link_mask);
}
for (i = 0; i < ARRAY_SIZE(fmd->csis); i++) {
if (fmd->csis[i].sd == NULL)
continue;
source = &fmd->csis[i].sd->entity;
pad = CSIS_PAD_SOURCE;
link_mask = 1 << fimc_id++;
ret = __fimc_md_create_fimc_sink_links(fmd, source, NULL,
pad, link_mask);
}
/* Create immutable links between each FIMC's subdev and video node */
flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED;
for (i = 0; i < FIMC_MAX_DEVS; i++) {
if (!fmd->fimc[i])
continue;
source = &fmd->fimc[i]->vid_cap.subdev.entity;
sink = &fmd->fimc[i]->vid_cap.vfd->entity;
ret = media_entity_create_link(source, FIMC_SD_PAD_SOURCE,
sink, 0, flags);
if (ret)
break;
}
return __fimc_md_create_flite_source_links(fmd);
}
/*
* The peripheral sensor clock management.
*/
static int fimc_md_get_clocks(struct fimc_md *fmd)
{
char clk_name[32];
struct clk *clock;
int i;
for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
snprintf(clk_name, sizeof(clk_name), "sclk_cam%u", i);
clock = clk_get(NULL, clk_name);
if (IS_ERR_OR_NULL(clock)) {
v4l2_err(&fmd->v4l2_dev, "Failed to get clock: %s",
clk_name);
return -ENXIO;
}
fmd->camclk[i].clock = clock;
}
return 0;
}
static void fimc_md_put_clocks(struct fimc_md *fmd)
{
int i = FIMC_MAX_CAMCLKS;
while (--i >= 0) {
if (IS_ERR_OR_NULL(fmd->camclk[i].clock))
continue;
clk_put(fmd->camclk[i].clock);
fmd->camclk[i].clock = NULL;
}
}
static int __fimc_md_set_camclk(struct fimc_md *fmd,
struct fimc_sensor_info *s_info,
bool on)
{
struct s5p_fimc_isp_info *pdata = s_info->pdata;
struct fimc_camclk_info *camclk;
int ret = 0;
if (WARN_ON(pdata->clk_id >= FIMC_MAX_CAMCLKS) || fmd == NULL)
return -EINVAL;
if (s_info->clk_on == on)
return 0;
camclk = &fmd->camclk[pdata->clk_id];
dbg("camclk %d, f: %lu, clk: %p, on: %d",
pdata->clk_id, pdata->clk_frequency, camclk, on);
if (on) {
if (camclk->use_count > 0 &&
camclk->frequency != pdata->clk_frequency)
return -EINVAL;
if (camclk->use_count++ == 0) {
clk_set_rate(camclk->clock, pdata->clk_frequency);
camclk->frequency = pdata->clk_frequency;
ret = clk_enable(camclk->clock);
}
s_info->clk_on = 1;
dbg("Enabled camclk %d: f: %lu", pdata->clk_id,
clk_get_rate(camclk->clock));
return ret;
}
if (WARN_ON(camclk->use_count == 0))
return 0;
if (--camclk->use_count == 0) {
clk_disable(camclk->clock);
s_info->clk_on = 0;
dbg("Disabled camclk %d", pdata->clk_id);
}
return ret;
}
/**
* fimc_md_set_camclk - peripheral sensor clock setup
* @sd: sensor subdev to configure sclk_cam clock for
* @on: 1 to enable or 0 to disable the clock
*
* There are 2 separate clock outputs available in the SoC for external
* image processors. These clocks are shared between all registered FIMC
* devices to which sensors can be attached, either directly or through
* the MIPI CSI receiver. The clock is allowed here to be used by
* multiple sensors concurrently if they use same frequency.
* The per sensor subdev clk_on attribute helps to synchronize accesses
* to the sclk_cam clocks from the video and media device nodes.
* This function should only be called when the graph mutex is held.
*/
int fimc_md_set_camclk(struct v4l2_subdev *sd, bool on)
{
struct fimc_sensor_info *s_info = v4l2_get_subdev_hostdata(sd);
struct fimc_md *fmd = entity_to_fimc_mdev(&sd->entity);
return __fimc_md_set_camclk(fmd, s_info, on);
}
static int fimc_md_link_notify(struct media_pad *source,
struct media_pad *sink, u32 flags)
{
struct fimc_lite *fimc_lite = NULL;
struct fimc_dev *fimc = NULL;
struct fimc_pipeline *pipeline;
struct v4l2_subdev *sd;
int ret = 0;
if (media_entity_type(sink->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
return 0;
sd = media_entity_to_v4l2_subdev(sink->entity);
switch (sd->grp_id) {
case FLITE_GROUP_ID:
fimc_lite = v4l2_get_subdevdata(sd);
pipeline = &fimc_lite->pipeline;
break;
case FIMC_GROUP_ID:
fimc = v4l2_get_subdevdata(sd);
pipeline = &fimc->pipeline;
break;
default:
return 0;
}
if (!(flags & MEDIA_LNK_FL_ENABLED)) {
ret = __fimc_pipeline_shutdown(pipeline);
pipeline->subdevs[IDX_SENSOR] = NULL;
pipeline->subdevs[IDX_CSIS] = NULL;
if (fimc) {
mutex_lock(&fimc->lock);
fimc_ctrls_delete(fimc->vid_cap.ctx);
mutex_unlock(&fimc->lock);
}
return ret;
}
/*
* Link activation. Enable power of pipeline elements only if the
* pipeline is already in use, i.e. its video node is opened.
* Recreate the controls destroyed during the link deactivation.
*/
if (fimc) {
mutex_lock(&fimc->lock);
if (fimc->vid_cap.refcnt > 0) {
ret = __fimc_pipeline_initialize(pipeline,
source->entity, true);
if (!ret)
ret = fimc_capture_ctrls_create(fimc);
}
mutex_unlock(&fimc->lock);
} else {
mutex_lock(&fimc_lite->lock);
if (fimc_lite->ref_count > 0) {
ret = __fimc_pipeline_initialize(pipeline,
source->entity, true);
}
mutex_unlock(&fimc_lite->lock);
}
return ret ? -EPIPE : ret;
}
static ssize_t fimc_md_sysfs_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct platform_device *pdev = to_platform_device(dev);
struct fimc_md *fmd = platform_get_drvdata(pdev);
if (fmd->user_subdev_api)
return strlcpy(buf, "Sub-device API (sub-dev)\n", PAGE_SIZE);
return strlcpy(buf, "V4L2 video node only API (vid-dev)\n", PAGE_SIZE);
}
static ssize_t fimc_md_sysfs_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct platform_device *pdev = to_platform_device(dev);
struct fimc_md *fmd = platform_get_drvdata(pdev);
bool subdev_api;
int i;
if (!strcmp(buf, "vid-dev\n"))
subdev_api = false;
else if (!strcmp(buf, "sub-dev\n"))
subdev_api = true;
else
return count;
fmd->user_subdev_api = subdev_api;
for (i = 0; i < FIMC_MAX_DEVS; i++)
if (fmd->fimc[i])
fmd->fimc[i]->vid_cap.user_subdev_api = subdev_api;
return count;
}
/*
* This device attribute is to select video pipeline configuration method.
* There are following valid values:
* vid-dev - for V4L2 video node API only, subdevice will be configured
* by the host driver.
* sub-dev - for media controller API, subdevs must be configured in user
* space before starting streaming.
*/
static DEVICE_ATTR(subdev_conf_mode, S_IWUSR | S_IRUGO,
fimc_md_sysfs_show, fimc_md_sysfs_store);
static int fimc_md_probe(struct platform_device *pdev)
{
struct v4l2_device *v4l2_dev;
struct fimc_md *fmd;
int ret;
fmd = devm_kzalloc(&pdev->dev, sizeof(*fmd), GFP_KERNEL);
if (!fmd)
return -ENOMEM;
spin_lock_init(&fmd->slock);
fmd->pdev = pdev;
strlcpy(fmd->media_dev.model, "SAMSUNG S5P FIMC",
sizeof(fmd->media_dev.model));
fmd->media_dev.link_notify = fimc_md_link_notify;
fmd->media_dev.dev = &pdev->dev;
v4l2_dev = &fmd->v4l2_dev;
v4l2_dev->mdev = &fmd->media_dev;
v4l2_dev->notify = fimc_sensor_notify;
snprintf(v4l2_dev->name, sizeof(v4l2_dev->name), "%s",
dev_name(&pdev->dev));
ret = v4l2_device_register(&pdev->dev, &fmd->v4l2_dev);
if (ret < 0) {
v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret);
return ret;
}
ret = media_device_register(&fmd->media_dev);
if (ret < 0) {
v4l2_err(v4l2_dev, "Failed to register media device: %d\n", ret);
goto err_md;
}
ret = fimc_md_get_clocks(fmd);
if (ret)
goto err_clk;
fmd->user_subdev_api = false;
/* Protect the media graph while we're registering entities */
mutex_lock(&fmd->media_dev.graph_mutex);
ret = fimc_md_register_platform_entities(fmd);
if (ret)
goto err_unlock;
if (pdev->dev.platform_data) {
ret = fimc_md_register_sensor_entities(fmd);
if (ret)
goto err_unlock;
}
ret = fimc_md_create_links(fmd);
if (ret)
goto err_unlock;
ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev);
if (ret)
goto err_unlock;
ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode);
if (ret)
goto err_unlock;
platform_set_drvdata(pdev, fmd);
mutex_unlock(&fmd->media_dev.graph_mutex);
return 0;
err_unlock:
mutex_unlock(&fmd->media_dev.graph_mutex);
err_clk:
media_device_unregister(&fmd->media_dev);
fimc_md_put_clocks(fmd);
fimc_md_unregister_entities(fmd);
err_md:
v4l2_device_unregister(&fmd->v4l2_dev);
return ret;
}
static int __devexit fimc_md_remove(struct platform_device *pdev)
{
struct fimc_md *fmd = platform_get_drvdata(pdev);
if (!fmd)
return 0;
device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
fimc_md_unregister_entities(fmd);
media_device_unregister(&fmd->media_dev);
fimc_md_put_clocks(fmd);
return 0;
}
static struct platform_driver fimc_md_driver = {
.probe = fimc_md_probe,
.remove = __devexit_p(fimc_md_remove),
.driver = {
.name = "s5p-fimc-md",
.owner = THIS_MODULE,
}
};
int __init fimc_md_init(void)
{
int ret;
request_module("s5p-csis");
ret = fimc_register_driver();
if (ret)
return ret;
return platform_driver_register(&fimc_md_driver);
}
void __exit fimc_md_exit(void)
{
platform_driver_unregister(&fimc_md_driver);
fimc_unregister_driver();
}
module_init(fimc_md_init);
module_exit(fimc_md_exit);
MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver");
MODULE_LICENSE("GPL");
MODULE_VERSION("2.0.1");