2018-05-07 18:26 GMT+09:00 Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>:
> Dear Mita-san,
>
> On Sun, May 06, 2018 at 11:19:23PM +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>
>> Reviewed-by: Jacopo Mondi <jacopo@xxxxxxxxxx>
>> Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>
>> ---
>> * v5
>> - Remove unnecessary space
>>
>> drivers/media/i2c/ov772x.c | 64 ++++++++++++++++++++++++++++++++--------------
>> 1 file changed, 45 insertions(+), 19 deletions(-)
>>
>> diff --git a/drivers/media/i2c/ov772x.c b/drivers/media/i2c/ov772x.c
>> index f939e28..2b02411 100644
>> --- a/drivers/media/i2c/ov772x.c
>> +++ b/drivers/media/i2c/ov772x.c
>> @@ -749,13 +749,13 @@ 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:
>> @@ -914,19 +914,14 @@ 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.
>> @@ -937,19 +932,19 @@ 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) {
>> /*
>> @@ -961,15 +956,35 @@ 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)
>> + return ret;
>> +
>> /* Format and window size. */
>> ret = ov772x_write(client, HSTART, win->rect.left >> 2);
>> if (ret < 0)
>> @@ -1020,9 +1035,9 @@ static int ov772x_set_params(struct ov772x_priv *priv,
>>
>> /* Set COM3. */
>> val = cfmt->com3;
>> - if (priv->info->flags & OV772X_FLAG_VFLIP)
>> + if (priv->info && (priv->info->flags & OV772X_FLAG_VFLIP))
>> val |= VFLIP_IMG;
>> - if (priv->info->flags & OV772X_FLAG_HFLIP)
>> + if (priv->info && (priv->info->flags & OV772X_FLAG_HFLIP))
>> val |= HFLIP_IMG;
>> if (priv->flag_vflip)
>> val ^= VFLIP_IMG;
>> @@ -1271,8 +1286,9 @@ static int ov772x_probe(struct i2c_client *client,
>> struct i2c_adapter *adapter = client->adapter;
>> int ret;
>>
>> - if (!client->dev.platform_data) {
>> - dev_err(&client->dev, "Missing ov772x platform data\n");
>> + if (!client->dev.of_node && !client->dev.platform_data) {
>> + dev_err(&client->dev,
>> + "Missing ov772x platform data for non-DT device\n");
>> return -EINVAL;
>> }
>>
>> @@ -1370,9 +1386,19 @@ 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
>
> No need for #ifdef's nor of_match_ptr below.
>
> If no other changes would be needed for the set (pending Jacopo's review),
> I can also drop these bits if you're ok for that.
I thought #ifdef was required to compile without CONFIG_OF, but it
actually wasn't required. So the change is fine with me.
>> +
>> 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,
>
> --
> Kind regards,
>
> Sakari Ailus
> sakari.ailus@xxxxxxxxxxxxxxx
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