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[media] s5p-fimc: Add device tree support for the media device driver

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This patch adds changes required for the main camera media device
driver corresponding to the top level 'camera' device node.
The drivers of devices corresponding to child nodes of the 'camera'
node are looked up and and registered as sub-devices to the top
level driver. The main driver's probing is deferred if any of the
sub-device drivers is not yet initialized and ready.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Sylwester Nawrocki 2013-03-08 12:59:33 -03:00 committed by Mauro Carvalho Chehab
parent eb62d9e9d6
commit e2985a260e
4 changed files with 98 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/media/platform/s5p-fimc/fimc-core.c
View File

@ -1281,7 +1281,6 @@ static const struct platform_device_id fimc_driver_ids[] = {
},
{ },
};
MODULE_DEVICE_TABLE(platform, fimc_driver_ids);
static const struct of_device_id fimc_of_match[] = {
{

108
drivers/media/platform/s5p-fimc/fimc-mdevice.c
View File

@ -17,11 +17,16 @@
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/of_device.h>
#include <linux/of_i2c.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/v4l2-of.h>
#include <media/media-device.h>
#include <media/s5p_fimc.h>
@ -264,6 +269,21 @@ static void fimc_md_unregister_sensor(struct v4l2_subdev *sd)
i2c_put_adapter(adapter);
}
#ifdef CONFIG_OF
static int __of_get_csis_id(struct device_node *np)
{
u32 reg = 0;
np = of_get_child_by_name(np, "port");
if (!np)
return -EINVAL;
of_property_read_u32(np, "reg", &reg);
return reg - FIMC_INPUT_MIPI_CSI2_0;
}
#else
#define __of_get_csis_id(np) (-ENOSYS)
#endif
static int fimc_md_register_sensor_entities(struct fimc_md *fmd)
{
struct s5p_platform_fimc *pdata = fmd->pdev->dev.platform_data;
@ -368,14 +388,14 @@ static int register_csis_entity(struct fimc_md *fmd,
struct device_node *node = pdev->dev.of_node;
int id, ret;
id = node ? of_alias_get_id(node, "csis") : max(0, pdev->id);
id = node ? __of_get_csis_id(node) : max(0, pdev->id);
if (WARN_ON(id >= CSIS_MAX_ENTITIES || fmd->csis[id].sd))
if (WARN_ON(id < 0 || id >= CSIS_MAX_ENTITIES))
return -ENOENT;
if (WARN_ON(fmd->csis[id].sd))
return -EBUSY;
if (WARN_ON(id >= CSIS_MAX_ENTITIES))
return 0;
sd->grp_id = GRP_ID_CSIS;
ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
if (!ret)
@ -457,6 +477,45 @@ static int fimc_md_pdev_match(struct device *dev, void *data)
return 0;
}
/* Register FIMC, FIMC-LITE and CSIS media entities */
#ifdef CONFIG_OF
static int fimc_md_register_of_platform_entities(struct fimc_md *fmd,
struct device_node *parent)
{
struct device_node *node;
int ret = 0;
for_each_available_child_of_node(parent, node) {
struct platform_device *pdev;
int plat_entity = -1;
pdev = of_find_device_by_node(node);
if (!pdev)
continue;
/* If driver of any entity isn't ready try all again later. */
if (!strcmp(node->name, CSIS_OF_NODE_NAME))
plat_entity = IDX_CSIS;
else if (!strcmp(node->name, FIMC_LITE_OF_NODE_NAME))
plat_entity = IDX_FLITE;
else if (!strcmp(node->name, FIMC_OF_NODE_NAME) &&
!of_property_read_bool(node, "samsung,lcd-wb"))
plat_entity = IDX_FIMC;
if (plat_entity >= 0)
ret = fimc_md_register_platform_entity(fmd, pdev,
plat_entity);
put_device(&pdev->dev);
if (ret < 0)
break;
}
return ret;
}
#else
#define fimc_md_register_of_platform_entities(fmd, node) (-ENOSYS)
#endif
static void fimc_md_unregister_entities(struct fimc_md *fmd)
{
int i;
@ -929,11 +988,12 @@ static DEVICE_ATTR(subdev_conf_mode, S_IWUSR | S_IRUGO,
static int fimc_md_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct v4l2_device *v4l2_dev;
struct fimc_md *fmd;
int ret;
fmd = devm_kzalloc(&pdev->dev, sizeof(*fmd), GFP_KERNEL);
fmd = devm_kzalloc(dev, sizeof(*fmd), GFP_KERNEL);
if (!fmd)
return -ENOMEM;
@ -943,15 +1003,14 @@ static int fimc_md_probe(struct platform_device *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;
fmd->media_dev.dev = 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));
strlcpy(v4l2_dev->name, "s5p-fimc-md", sizeof(v4l2_dev->name));
ret = v4l2_device_register(&pdev->dev, &fmd->v4l2_dev);
ret = v4l2_device_register(dev, &fmd->v4l2_dev);
if (ret < 0) {
v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret);
return ret;
@ -965,21 +1024,25 @@ static int fimc_md_probe(struct platform_device *pdev)
if (ret)
goto err_clk;
fmd->user_subdev_api = false;
fmd->user_subdev_api = (dev->of_node != NULL);
/* Protect the media graph while we're registering entities */
mutex_lock(&fmd->media_dev.graph_mutex);
ret = bus_for_each_dev(&platform_bus_type, NULL, fmd,
fimc_md_pdev_match);
if (dev->of_node)
ret = fimc_md_register_of_platform_entities(fmd, dev->of_node);
else
ret = bus_for_each_dev(&platform_bus_type, NULL, fmd,
fimc_md_pdev_match);
if (ret)
goto err_unlock;
if (pdev->dev.platform_data) {
if (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;
@ -1019,12 +1082,25 @@ static int fimc_md_remove(struct platform_device *pdev)
return 0;
}
static struct platform_device_id fimc_driver_ids[] __always_unused = {
{ .name = "s5p-fimc-md" },
{ },
};
MODULE_DEVICE_TABLE(platform, fimc_driver_ids);
static const struct of_device_id fimc_md_of_match[] = {
{ .compatible = "samsung,fimc" },
{ },
};
MODULE_DEVICE_TABLE(of, fimc_md_of_match);
static struct platform_driver fimc_md_driver = {
.probe = fimc_md_probe,
.remove = fimc_md_remove,
.driver = {
.name = "s5p-fimc-md",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(fimc_md_of_match),
.name = "s5p-fimc-md",
.owner = THIS_MODULE,
}
};

5
drivers/media/platform/s5p-fimc/fimc-mdevice.h
View File

@ -21,6 +21,11 @@
#include "fimc-lite.h"
#include "mipi-csis.h"
#define FIMC_OF_NODE_NAME "fimc"
#define FIMC_LITE_OF_NODE_NAME "fimc-lite"
#define FIMC_IS_OF_NODE_NAME "fimc-is"
#define CSIS_OF_NODE_NAME "csis"
/* Group IDs of sensor, MIPI-CSIS, FIMC-LITE and the writeback subdevs. */
#define GRP_ID_SENSOR (1 << 8)
#define GRP_ID_FIMC_IS_SENSOR (1 << 9)

1
include/media/s5p_fimc.h
View File

@ -94,6 +94,7 @@ enum fimc_subdev_index {
IDX_SENSOR,
IDX_CSIS,
IDX_FLITE,
IDX_IS_ISP,
IDX_FIMC,
IDX_MAX,
};