On Media Controller enabled systems this patch allows the user to
communicate with the driver directly over /dev/v4l-subdev* device nodes
using VIDIOC_SUBDEV_* ioctl()s.
Signed-off-by: Guennadi Liakhovetski <g.liakhovet...@gmx.de>
---
drivers/media/video/mt9t112.c | 97 ++++++++++++++++++++++++++++++++++-------
1 files changed, 81 insertions(+), 16 deletions(-)
diff --git a/drivers/media/video/mt9t112.c b/drivers/media/video/mt9t112.c
index 32114a3..bb95ad1 100644
--- a/drivers/media/video/mt9t112.c
+++ b/drivers/media/video/mt9t112.c
@@ -25,6 +25,7 @@
#include <linux/v4l2-mediabus.h>
#include <linux/videodev2.h>
+#include <media/media-entity.h>
#include <media/mt9t112.h>
#include <media/soc_camera.h>
#include <media/v4l2-chip-ident.h>
@@ -87,6 +88,7 @@ struct mt9t112_format {
struct mt9t112_priv {
struct v4l2_subdev subdev;
+ struct media_pad pad;
struct mt9t112_camera_info *info;
struct i2c_client *client;
struct v4l2_rect frame;
@@ -739,8 +741,7 @@ static int mt9t112_init_camera(const struct i2c_client
*client)
static int mt9t112_g_chip_ident(struct v4l2_subdev *sd,
struct v4l2_dbg_chip_ident *id)
{
- struct i2c_client *client = v4l2_get_subdevdata(sd);
- struct mt9t112_priv *priv = to_mt9t112(client);
+ struct mt9t112_priv *priv = container_of(sd, struct mt9t112_priv,
subdev);
id->ident = priv->model;
id->revision = 0;
@@ -790,7 +791,7 @@ static struct v4l2_subdev_core_ops mt9t112_subdev_core_ops
= {
static int mt9t112_s_stream(struct v4l2_subdev *sd, int enable)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
- struct mt9t112_priv *priv = to_mt9t112(client);
+ struct mt9t112_priv *priv = container_of(sd, struct mt9t112_priv,
subdev);
int ret = 0;
if (!enable) {
@@ -888,8 +889,7 @@ static int mt9t112_cropcap(struct v4l2_subdev *sd, struct
v4l2_cropcap *a)
static int mt9t112_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
{
- struct i2c_client *client = v4l2_get_subdevdata(sd);
- struct mt9t112_priv *priv = to_mt9t112(client);
+ struct mt9t112_priv *priv = container_of(sd, struct mt9t112_priv,
subdev);
a->c = priv->frame;
a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
@@ -899,8 +899,7 @@ static int mt9t112_g_crop(struct v4l2_subdev *sd, struct
v4l2_crop *a)
static int mt9t112_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
{
- struct i2c_client *client = v4l2_get_subdevdata(sd);
- struct mt9t112_priv *priv = to_mt9t112(client);
+ struct mt9t112_priv *priv = container_of(sd, struct mt9t112_priv,
subdev);
struct v4l2_rect *rect = &a->c;
return mt9t112_set_params(priv, rect, priv->format->code);
@@ -909,8 +908,7 @@ static int mt9t112_s_crop(struct v4l2_subdev *sd, struct
v4l2_crop *a)
static int mt9t112_g_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
- struct i2c_client *client = v4l2_get_subdevdata(sd);
- struct mt9t112_priv *priv = to_mt9t112(client);
+ struct mt9t112_priv *priv = container_of(sd, struct mt9t112_priv,
subdev);
mf->width = priv->frame.width;
mf->height = priv->frame.height;
@@ -924,8 +922,7 @@ static int mt9t112_g_fmt(struct v4l2_subdev *sd,
static int mt9t112_s_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
- struct i2c_client *client = v4l2_get_subdevdata(sd);
- struct mt9t112_priv *priv = to_mt9t112(client);
+ struct mt9t112_priv *priv = container_of(sd, struct mt9t112_priv,
subdev);
struct v4l2_rect rect = {
.width = mf->width,
.height = mf->height,
@@ -996,8 +993,8 @@ static int mt9t112_s_mbus_config(struct v4l2_subdev *sd,
const struct v4l2_mbus_config *cfg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct mt9t112_priv *priv = container_of(sd, struct mt9t112_priv,
subdev);
struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
- struct mt9t112_priv *priv = to_mt9t112(client);
if (soc_camera_apply_board_flags(icl, cfg) &
V4L2_MBUS_PCLK_SAMPLE_RISING)
priv->flags |= PCLK_RISING;
@@ -1018,14 +1015,67 @@ static struct v4l2_subdev_video_ops
mt9t112_subdev_video_ops = {
.s_mbus_config = mt9t112_s_mbus_config,
};
-/************************************************************************
- i2c driver
-************************************************************************/
+static int mt9t112_enum_mbus_code(struct v4l2_subdev *sd, struct
v4l2_subdev_fh *fh,
+ struct v4l2_subdev_mbus_code_enum *ce)
+{
+ if (ce->index >= ARRAY_SIZE(mt9t112_cfmts))
+ return -EINVAL;
+
+ ce->code = mt9t112_cfmts[ce->index].code;
+ return 0;
+}
+
+static int mt9t112_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_format *sd_fmt)
+{
+ struct v4l2_mbus_framefmt *mf;
+
+ if (sd_fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE)
+ return mt9t112_g_fmt(sd, &sd_fmt->format);
+
+ mf = v4l2_subdev_get_try_format(fh, sd_fmt->pad);
+ sd_fmt->format = *mf;
+ return 0;
+}
+
+static int mt9t112_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_format *sd_fmt)
+{
+ struct v4l2_mbus_framefmt *mf;
+
+ if (sd_fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE)
+ return mt9t112_s_fmt(sd, &sd_fmt->format);
+
+ mf = v4l2_subdev_get_try_format(fh, sd_fmt->pad);
+ *mf = sd_fmt->format;
+ return mt9t112_try_fmt(sd, mf);
+}
+
+struct v4l2_subdev_pad_ops mt9t112_subdev_pad_ops = {
+ .enum_mbus_code = mt9t112_enum_mbus_code,
+ .get_fmt = mt9t112_get_fmt,
+ .set_fmt = mt9t112_set_fmt,
+};
+
static struct v4l2_subdev_ops mt9t112_subdev_ops = {
.core = &mt9t112_subdev_core_ops,
.video = &mt9t112_subdev_video_ops,
+ .pad = &mt9t112_subdev_pad_ops,
};
+static int mt9t112_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ struct v4l2_mbus_framefmt *mf = v4l2_subdev_get_try_format(fh, 0);
+ return mf ? mt9t112_try_fmt(sd, mf) : 0;
+}
+
+static const struct v4l2_subdev_internal_ops mt9t112_subdev_internal_ops = {
+ .open = mt9t112_open,
+};
+
+/************************************************************************
+ i2c driver
+************************************************************************/
static int mt9t112_camera_probe(struct i2c_client *client)
{
struct mt9t112_priv *priv = to_mt9t112(client);
@@ -1081,21 +1131,36 @@ static int mt9t112_probe(struct i2c_client *client,
priv->info = icl->priv;
v4l2_i2c_subdev_init(&priv->subdev, client, &mt9t112_subdev_ops);
+ priv->subdev.internal_ops = &mt9t112_subdev_internal_ops;
+ priv->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+
+ priv->pad.flags = MEDIA_PAD_FL_SOURCE;
+ ret = subdev_media_entity_init(&priv->subdev, 1, &priv->pad, 0);
+ if (ret < 0)
+ goto emeinit;
ret = mt9t112_camera_probe(client);
if (ret)
- kfree(priv);
+ goto evprobe;
/* Cannot fail: using the default supported pixel code */
mt9t112_set_params(priv, &rect, V4L2_MBUS_FMT_UYVY8_2X8);
return ret;
+
+evprobe:
+ subdev_media_entity_cleanup(&priv->subdev);
+emeinit:
+ kfree(priv);
+ return ret;
}
static int mt9t112_remove(struct i2c_client *client)
{
struct mt9t112_priv *priv = to_mt9t112(client);
+ v4l2_device_unregister_subdev(&priv->subdev);
+ subdev_media_entity_cleanup(&priv->subdev);
kfree(priv);
return 0;
}
--
1.7.2.5
--
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