Hi Akinobu,
On Sun, Apr 08, 2018 at 12:48:10AM +0900, Akinobu Mita wrote:
> The ov772x driver currently only supports legacy platform data probe.
> This change enables device tree probing.
>
> Note that the platform data probe can select auto or manual edge control
> mode, but the device tree probling can only select auto edge control mode
> for now.
>
> Cc: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
> Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Cc: Hans Verkuil <hans.verkuil@xxxxxxxxx>
> Cc: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
> Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx>
> Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>
> ---
> drivers/media/i2c/ov772x.c | 60 ++++++++++++++++++++++++++++++----------------
> 1 file changed, 40 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/media/i2c/ov772x.c b/drivers/media/i2c/ov772x.c
> index 5e91fa1..e67ec37 100644
> --- a/drivers/media/i2c/ov772x.c
> +++ b/drivers/media/i2c/ov772x.c
> @@ -763,13 +763,13 @@ static int ov772x_s_ctrl(struct v4l2_ctrl *ctrl)
> case V4L2_CID_VFLIP:
> val = ctrl->val ? VFLIP_IMG : 0x00;
> priv->flag_vflip = ctrl->val;
> - if (priv->info->flags & OV772X_FLAG_VFLIP)
> + if (priv->info && (priv->info->flags & OV772X_FLAG_VFLIP))
> val ^= VFLIP_IMG;
> return ov772x_mask_set(client, COM3, VFLIP_IMG, val);
> case V4L2_CID_HFLIP:
> val = ctrl->val ? HFLIP_IMG : 0x00;
> priv->flag_hflip = ctrl->val;
> - if (priv->info->flags & OV772X_FLAG_HFLIP)
> + if (priv->info && (priv->info->flags & OV772X_FLAG_HFLIP))
> val ^= HFLIP_IMG;
> return ov772x_mask_set(client, COM3, HFLIP_IMG, val);
> case V4L2_CID_BAND_STOP_FILTER:
> @@ -928,19 +928,14 @@ static void ov772x_select_params(const struct v4l2_mbus_framefmt *mf,
> *win = ov772x_select_win(mf->width, mf->height);
> }
>
> -static int ov772x_set_params(struct ov772x_priv *priv,
> - const struct ov772x_color_format *cfmt,
> - const struct ov772x_win_size *win)
> +static int ov772x_edgectrl(struct ov772x_priv *priv)
> {
> struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
> - struct v4l2_fract tpf;
> int ret;
> - u8 val;
>
> - /* Reset hardware. */
> - ov772x_reset(client);
> + if (!priv->info)
> + return 0;
>
> - /* Edge Ctrl. */
> if (priv->info->edgectrl.strength & OV772X_MANUAL_EDGE_CTRL) {
> /*
> * Manual Edge Control Mode.
> @@ -951,19 +946,19 @@ static int ov772x_set_params(struct ov772x_priv *priv,
>
> ret = ov772x_mask_set(client, DSPAUTO, EDGE_ACTRL, 0x00);
> if (ret < 0)
> - goto ov772x_set_fmt_error;
> + return ret;
>
> ret = ov772x_mask_set(client,
> EDGE_TRSHLD, OV772X_EDGE_THRESHOLD_MASK,
> priv->info->edgectrl.threshold);
> if (ret < 0)
> - goto ov772x_set_fmt_error;
> + return ret;
>
> ret = ov772x_mask_set(client,
> EDGE_STRNGT, OV772X_EDGE_STRENGTH_MASK,
> priv->info->edgectrl.strength);
> if (ret < 0)
> - goto ov772x_set_fmt_error;
> + return ret;
>
> } else if (priv->info->edgectrl.upper > priv->info->edgectrl.lower) {
> /*
> @@ -975,15 +970,35 @@ static int ov772x_set_params(struct ov772x_priv *priv,
> EDGE_UPPER, OV772X_EDGE_UPPER_MASK,
> priv->info->edgectrl.upper);
> if (ret < 0)
> - goto ov772x_set_fmt_error;
> + return ret;
>
> ret = ov772x_mask_set(client,
> EDGE_LOWER, OV772X_EDGE_LOWER_MASK,
> priv->info->edgectrl.lower);
> if (ret < 0)
> - goto ov772x_set_fmt_error;
> + return ret;
> }
>
> + return 0;
> +}
> +
> +static int ov772x_set_params(struct ov772x_priv *priv,
> + const struct ov772x_color_format *cfmt,
> + const struct ov772x_win_size *win)
> +{
> + struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
> + struct v4l2_fract tpf;
> + int ret;
> + u8 val;
> +
> + /* Reset hardware. */
> + ov772x_reset(client);
> +
> + /* Edge Ctrl. */
> + ret = ov772x_edgectrl(priv);
> + if (ret < 0)
> + goto ov772x_set_fmt_error;
> +
> /* Format and window size. */
> ret = ov772x_write(client, HSTART, win->rect.left >> 2);
> if (ret < 0)
> @@ -1284,11 +1299,6 @@ static int ov772x_probe(struct i2c_client *client,
> struct i2c_adapter *adapter = client->adapter;
> int ret;
>
> - if (!client->dev.platform_data) {
Not sure this has to be removed completely. I'm debated, as in
general, for mainline code, we should make sure every user of this
driver shall provide platform_data during review, and this check is
not requried. But in general, I still think it may have value.
What about:
if (!client->dev.of_node && !client->dev.platform_data) {
dev_err(&client->dev, "Missing ov772x platform data\n");
return -EINVAL;
}
Thanks
j
> - dev_err(&client->dev, "Missing ov772x platform data\n");
> - return -EINVAL;
> - }
> -
> priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
> if (!priv)
> return -ENOMEM;
> @@ -1390,9 +1400,19 @@ static const struct i2c_device_id ov772x_id[] = {
> };
> MODULE_DEVICE_TABLE(i2c, ov772x_id);
>
> +#if IS_ENABLED(CONFIG_OF)
> +static const struct of_device_id ov772x_of_match[] = {
> + { .compatible = "ovti,ov7725", },
> + { .compatible = "ovti,ov7720", },
> + { /* sentinel */ },
> +};
> +MODULE_DEVICE_TABLE(of, ov772x_of_match);
> +#endif
> +
> static struct i2c_driver ov772x_i2c_driver = {
> .driver = {
> .name = "ov772x",
> + .of_match_table = of_match_ptr(ov772x_of_match),
> },
> .probe = ov772x_probe,
> .remove = ov772x_remove,
> --
> 2.7.4
>
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