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Subject[PATCH/RFC v2 7/8] media: exynos4-is: Add support for v4l2-flash subdevs
Date
This patch adds suppport for external v4l2-flash devices.
The support includes parsing camera-flash DT property
and asynchronous subdevice registration.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
---
drivers/media/platform/exynos4-is/media-dev.c | 34 ++++++++++++++++++++++---
drivers/media/platform/exynos4-is/media-dev.h | 14 +++++++++-
2 files changed, 43 insertions(+), 5 deletions(-)

diff --git a/drivers/media/platform/exynos4-is/media-dev.c b/drivers/media/platform/exynos4-is/media-dev.c
index e62211a..3d750891 100644
--- a/drivers/media/platform/exynos4-is/media-dev.c
+++ b/drivers/media/platform/exynos4-is/media-dev.c
@@ -28,6 +28,7 @@
#include <linux/types.h>
#include <linux/slab.h>
#include <media/v4l2-async.h>
+#include <media/v4l2-flash.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-of.h>
#include <media/media-device.h>
@@ -400,7 +401,7 @@ static int fimc_md_parse_port_node(struct fimc_md *fmd,
struct device_node *port,
unsigned int index)
{
- struct device_node *rem, *ep, *np;
+ struct device_node *rem, *ep, *np, *fn;
struct fimc_source_info *pd;
struct v4l2_of_endpoint endpoint;
u32 val;
@@ -440,6 +441,14 @@ static int fimc_md_parse_port_node(struct fimc_md *fmd,
return -EINVAL;
}

+ fn = of_parse_phandle(rem, "camera-flash", 0);
+ if (fn) {
+ fmd->flash[fmd->num_flashes].asd.match_type =
+ V4L2_ASYNC_MATCH_OF;
+ fmd->flash[fmd->num_flashes].asd.match.of.node = fn;
+ fmd->num_flashes++;
+ }
+
if (fimc_input_is_parallel(endpoint.base.port)) {
if (endpoint.bus_type == V4L2_MBUS_PARALLEL)
pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_601;
@@ -1531,6 +1540,15 @@ static int subdev_notifier_bound(struct v4l2_async_notifier *notifier,
struct fimc_sensor_info *si = NULL;
int i;

+ /* Register flash subdev if detected any */
+ for (i = 0; i < ARRAY_SIZE(fmd->flash); i++) {
+ if (fmd->flash[i].asd.match.of.node == subdev->dev->of_node) {
+ fmd->flash[i].v4l2_flash = v4l2_subdev_to_flash(subdev);
+ fmd->num_flashes++;
+ return 0;
+ }
+ }
+
/* Find platform data for this sensor subdev */
for (i = 0; i < ARRAY_SIZE(fmd->sensor); i++)
if (fmd->sensor[i].asd.match.of.node == subdev->dev->of_node)
@@ -1578,7 +1596,7 @@ 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;
+ int i, ret;

fmd = devm_kzalloc(dev, sizeof(*fmd), GFP_KERNEL);
if (!fmd)
@@ -1646,6 +1664,12 @@ static int fimc_md_probe(struct platform_device *pdev)
mutex_unlock(&fmd->media_dev.graph_mutex);
goto err_m_ent;
}
+
+ if (dev->of_node) {
+ for (i = 0; i < fmd->num_flashes; ++i)
+ fmd->async_subdevs[fmd->num_sensors + i] =
+ &fmd->flash[i].asd;
+ }
}

mutex_unlock(&fmd->media_dev.graph_mutex);
@@ -1664,12 +1688,14 @@ static int fimc_md_probe(struct platform_device *pdev)
goto err_attr;
}

- if (fmd->num_sensors > 0) {
+ if (fmd->num_sensors > 0 || fmd->num_flashes > 0) {
fmd->subdev_notifier.subdevs = fmd->async_subdevs;
- fmd->subdev_notifier.num_subdevs = fmd->num_sensors;
+ fmd->subdev_notifier.num_subdevs = fmd->num_sensors +
+ fmd->num_flashes;
fmd->subdev_notifier.bound = subdev_notifier_bound;
fmd->subdev_notifier.complete = subdev_notifier_complete;
fmd->num_sensors = 0;
+ fmd->num_flashes = 0;

ret = v4l2_async_notifier_register(&fmd->v4l2_dev,
&fmd->subdev_notifier);
diff --git a/drivers/media/platform/exynos4-is/media-dev.h b/drivers/media/platform/exynos4-is/media-dev.h
index ee1e251..9af9de8 100644
--- a/drivers/media/platform/exynos4-is/media-dev.h
+++ b/drivers/media/platform/exynos4-is/media-dev.h
@@ -18,6 +18,7 @@
#include <media/media-device.h>
#include <media/media-entity.h>
#include <media/v4l2-device.h>
+#include <media/v4l2-flash.h>
#include <media/v4l2-subdev.h>
#include <media/s5p_fimc.h>

@@ -33,6 +34,8 @@
#define PINCTRL_STATE_IDLE "idle"

#define FIMC_MAX_SENSORS 4
+#define FIMC_MAX_FLASHES 1
+#define FIMC_MAX_ASYNC_SUBDEVS (FIMC_MAX_SENSORS + FIMC_MAX_FLASHES)
#define FIMC_MAX_CAMCLKS 2
#define DEFAULT_SENSOR_CLK_FREQ 24000000U

@@ -93,6 +96,11 @@ struct fimc_sensor_info {
struct fimc_dev *host;
};

+struct fimc_flash_info {
+ struct v4l2_flash *v4l2_flash;
+ struct v4l2_async_subdev asd;
+};
+
struct cam_clk {
struct clk_hw hw;
struct fimc_md *fmd;
@@ -104,6 +112,8 @@ struct cam_clk {
* @csis: MIPI CSIS subdevs data
* @sensor: array of registered sensor subdevs
* @num_sensors: actual number of registered sensors
+ * @flash: array of registered flash subdevs
+ * @num_flashes: actual number of registered flashes
* @camclk: external sensor clock information
* @fimc: array of registered fimc devices
* @fimc_is: fimc-is data structure
@@ -123,6 +133,8 @@ struct fimc_md {
struct fimc_csis_info csis[CSIS_MAX_ENTITIES];
struct fimc_sensor_info sensor[FIMC_MAX_SENSORS];
int num_sensors;
+ struct fimc_flash_info flash[FIMC_MAX_FLASHES];
+ int num_flashes;
struct fimc_camclk_info camclk[FIMC_MAX_CAMCLKS];
struct clk *wbclk[FIMC_MAX_WBCLKS];
struct fimc_lite *fimc_lite[FIMC_LITE_MAX_DEVS];
@@ -149,7 +161,7 @@ struct fimc_md {
} clk_provider;

struct v4l2_async_notifier subdev_notifier;
- struct v4l2_async_subdev *async_subdevs[FIMC_MAX_SENSORS];
+ struct v4l2_async_subdev *async_subdevs[FIMC_MAX_ASYNC_SUBDEVS];

bool user_subdev_api;
spinlock_t slock;
--
1.7.9.5


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