Hi Sylwester,
Thanks for the patch. It's nice to see sensor drivers picking up the pad-level
API :-)
On Wednesday 22 June 2011 17:44:29 Sylwester Nawrocki wrote:
> Replace g/s_mbus_fmt ops with the pad level get/set_fmt operations.
> Add media entity initalization and set subdev flags so the host driver
> creates a v4l-subdev device node for the driver. A mutex is added for
> serializing operations on subdevice node. When setting format
> is attempted during streaming EBUSY error code will be returned.
[snip]
> @@ -130,14 +130,19 @@ static const char * const noon010_supply_name[] = {
> #define NOON010_NUM_SUPPLIES ARRAY_SIZE(noon010_supply_name)
>
> struct noon010_info {
> + /* Mutex protecting this data structure and subdev operations */
> + struct mutex lock;
Locks protect data, not operations. You should describe which data members are
protected by the lock.
> struct v4l2_subdev sd;
> + struct media_pad pad;
> struct v4l2_ctrl_handler hdl;
> const struct noon010pc30_platform_data *pdata;
> const struct noon010_format *curr_fmt;
> const struct noon010_frmsize *curr_win;
> + struct v4l2_mbus_framefmt format;
> unsigned int hflip:1;
> unsigned int vflip:1;
> unsigned int power:1;
> + unsigned int streaming:1;
> u8 i2c_reg_page;
> struct regulator_bulk_data supply[NOON010_NUM_SUPPLIES];
> u32 gpio_nreset;
[snip]
> @@ -374,6 +380,8 @@ static int noon010_try_frame_size(struct
> v4l2_mbus_framefmt *mf) if (match) {
> mf->width = match->width;
> mf->height = match->height;
> + if (size)
> + *size = match;
> return 0;
> }
> return -EINVAL;
> @@ -464,36 +472,45 @@ static int noon010_s_ctrl(struct v4l2_ctrl *ctrl)
[snip]
> -static int noon010_g_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt
> *mf)
> +static int noon010_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh
> *fh,
> + struct v4l2_subdev_format *fmt)
> {
> struct noon010_info *info = to_noon010(sd);
> - int ret;
> + struct v4l2_mbus_framefmt *mf;
>
> - if (!mf)
> + if (fmt->pad != 0)
> return -EINVAL;
subdev_do_ioctl() already validates fmt->pad.
> - if (!info->curr_win || !info->curr_fmt) {
> - ret = noon010_set_params(sd);
> - if (ret)
> - return ret;
> + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
> + if (fh) {
> + mf = v4l2_subdev_get_try_format(fh, 0);
> + fmt->format = *mf;
> + }
> + return 0;
> }
> + /* Active format */
> + mf = &fmt->format;
>
> + mutex_lock(&info->lock);
> mf->width = info->curr_win->width;
> mf->height = info->curr_win->height;
> mf->code = info->curr_fmt->code;
> mf->colorspace = info->curr_fmt->colorspace;
> - mf->field = V4L2_FIELD_NONE;
> + mutex_unlock(&info->lock);
>
> + mf->field = V4L2_FIELD_NONE;
> + mf->colorspace = V4L2_COLORSPACE_JPEG;
> return 0;
> }
>
[snip]
> @@ -583,6 +609,17 @@ static int noon010_s_power(struct v4l2_subdev *sd, int
> on) return ret;
> }
>
> +static int noon010_s_stream(struct v4l2_subdev *sd, int on)
> +{
> + struct noon010_info *info = to_noon010(sd);
> +
> + mutex_lock(&info->lock);
> + info->streaming = on;
> + mutex_unlock(&info->lock);
Does the sensor produce data continuously, without any way to stop it ?
> +
> + return 0;
> +}
> +
> static int noon010_g_chip_ident(struct v4l2_subdev *sd,
> struct v4l2_dbg_chip_ident *chip)
You can get rid of g_chip_ident as well.
> {
[snip]
> @@ -666,9 +707,11 @@ static int noon010_probe(struct i2c_client *client,
> if (!info)
> return -ENOMEM;
>
> + mutex_init(&info->lock);
> sd = &info->sd;
> strlcpy(sd->name, MODULE_NAME, sizeof(sd->name));
> v4l2_i2c_subdev_init(sd, client, &noon010_ops);
> + sd->flags = V4L2_SUBDEV_FL_HAS_DEVNODE;
You should |= V4L2_SUBDEV_FL_HAS_DEVNODE flag. v4l2_i2c_subdev_init() sets
V4L2_SUBDEV_FL_IS_I2C.
> v4l2_ctrl_handler_init(&info->hdl, 3);
--
Regards,
Laurent Pinchart
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