2018-04-09 18:27 GMT+09:00 jacopo mondi <jacopo@xxxxxxxxxx>:
> 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;
> }
OK. I'll take this.
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