linux-kernel - Re: [PATCH v4 04/15] media: i2c: ds90ub960: Fix logging SP & EQ status only for UB9702

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Message-ID: <80c92aef-81e0-41fa-b347-88b76e5e351e@ideasonboard.com>
Date: Mon, 9 Dec 2024 12:14:29 +0200
From: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To: Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>,
 Hans Verkuil <hverkuil-cisco@...all.nl>,
 Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
 Jai Luthra <jai.luthra@...asonboard.com>, linux-media@...r.kernel.org,
 linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH v4 04/15] media: i2c: ds90ub960: Fix logging SP & EQ
 status only for UB9702

Hi,

On 09/12/2024 11:11, Sakari Ailus wrote:
> Huomenta,
> 
> On Fri, Dec 06, 2024 at 10:26:40AM +0200, Tomi Valkeinen wrote:
>> UB9702 does not have SP and EQ registers, but the driver uses them in
>> log_status(). Fix this by separating the SP and EQ related log_status()
>> work into a separate function (for clarity) and calling that function
>> only for UB960.
>>
>> Cc: stable@...r.kernel.org
>> Fixes: afe267f2d368 ("media: i2c: add DS90UB960 driver")
>> Reviewed-by: Jai Luthra <jai.luthra@...asonboard.com>
>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
>> ---
>>   drivers/media/i2c/ds90ub960.c | 90 ++++++++++++++++++++++++-------------------
>>   1 file changed, 50 insertions(+), 40 deletions(-)
>>
>> diff --git a/drivers/media/i2c/ds90ub960.c b/drivers/media/i2c/ds90ub960.c
>> index 24198b803eff..94c8acf171b4 100644
>> --- a/drivers/media/i2c/ds90ub960.c
>> +++ b/drivers/media/i2c/ds90ub960.c
>> @@ -2950,6 +2950,54 @@ static const struct v4l2_subdev_pad_ops ub960_pad_ops = {
>>   	.set_fmt = ub960_set_fmt,
>>   };
>>   
>> +static void ub960_log_status_ub960_sp_eq(struct ub960_data *priv,
>> +					 unsigned int nport)
>> +{
>> +	struct device *dev = &priv->client->dev;
>> +	u8 eq_level;
>> +	s8 strobe_pos;
>> +	u8 v = 0;
>> +
>> +	/* Strobe */
>> +
>> +	ub960_read(priv, UB960_XR_AEQ_CTL1, &v);
> 
> How about adding __must_check to the ub960_read()?

Yes, that's a good idea.

We also have a patch in works that'll add error handling to all the i2c 
reads and writes (and some other ub960 improvements), on top of this series.

  Tomi