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Subject: Re: [PATCH v5 12/15] media: i2c: rdacm20: Embed 'serializer' field
To:     Jacopo Mondi <jacopo@jmondi.org>
Cc:     Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Jacopo Mondi <jacopo+renesas@jmondi.org>,
        kieran.bingham+renesas@ideasonboard.com,
        niklas.soderlund+renesas@ragnatech.se, geert@linux-m68k.org,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <20210616124616.49249-1-jacopo+renesas@jmondi.org>
 <20210616124616.49249-13-jacopo+renesas@jmondi.org>
 <YMqTyFvxer0vjsKT@pendragon.ideasonboard.com>
 <1e6e5cd0-82b1-db7a-ec70-ebb8831c11c4@xs4all.nl>
 <20210617074222.4lbcewsydre4b2nb@uno.localdomain>
From:   Hans Verkuil <hverkuil-cisco@xs4all.nl>
Message-ID: <1c460f30-91d3-25a3-78dd-7108bfa24d7c@xs4all.nl>
Date:   Thu, 17 Jun 2021 10:12:26 +0200
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On 17/06/2021 09:42, Jacopo Mondi wrote:
> Hello,
> 
> On Thu, Jun 17, 2021 at 08:18:42AM +0200, Hans Verkuil wrote:
>> On 17/06/2021 02:14, Laurent Pinchart wrote:
>>> Hi Jacopo,
>>>
>>> Thank you for the patch.
>>>
>>> This should be moved before 11/15 to avoid a bisection breakage (or
>>> 11/15 should be fixed, and this patch updated accordingly).
>>
>> Good catch!
> 
> Good catch indeed... Sorry about this I shuffled patches around
> multiple times and missed this one
> 
>>
>> Jacopo, I dropped the PR I made. It you just want to swap patch 11 and 12,
>> then I can do that, if you want more extensive changes, then I need a v6.
>>
>> Let me know what you want.
> 
> I think swapping 11 and 12 is enough, thanks for handling it.
> (BTW there's one additional tag from Kieran to collect which is not in
> v5. Would you like a v6 for that ?)

Updated the PR and added Kieran's tag. So no need for you to do anything.

Regards,

	Hans

> 
> Thanks
>   j
> 
>>
>> 	Hans
>>
>>>
>>> On Wed, Jun 16, 2021 at 02:46:13PM +0200, Jacopo Mondi wrote:
>>>> There's no reason to allocate dynamically the 'serializer' field in
>>>> the driver structure.
>>>>
>>>> Embed the field and adjust all its users in the driver.
>>>>
>>>> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
>>>> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
>>>> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
>>>> ---
>>>>  drivers/media/i2c/rdacm20.c | 36 +++++++++++++++---------------------
>>>>  1 file changed, 15 insertions(+), 21 deletions(-)
>>>>
>>>> diff --git a/drivers/media/i2c/rdacm20.c b/drivers/media/i2c/rdacm20.c
>>>> index 5e0314a2b1ca..029af8fd7485 100644
>>>> --- a/drivers/media/i2c/rdacm20.c
>>>> +++ b/drivers/media/i2c/rdacm20.c
>>>> @@ -312,7 +312,7 @@ static const struct ov10635_reg {
>>>>
>>>>  struct rdacm20_device {
>>>>  	struct device			*dev;
>>>> -	struct max9271_device		*serializer;
>>>> +	struct max9271_device		serializer;
>>>>  	struct i2c_client		*sensor;
>>>>  	struct v4l2_subdev		sd;
>>>>  	struct media_pad		pad;
>>>> @@ -399,7 +399,7 @@ static int rdacm20_s_stream(struct v4l2_subdev *sd, int enable)
>>>>  {
>>>>  	struct rdacm20_device *dev = sd_to_rdacm20(sd);
>>>>
>>>> -	return max9271_set_serial_link(dev->serializer, enable);
>>>> +	return max9271_set_serial_link(&dev->serializer, enable);
>>>>  }
>>>>
>>>>  static int rdacm20_enum_mbus_code(struct v4l2_subdev *sd,
>>>> @@ -455,10 +455,10 @@ static int rdacm20_initialize(struct rdacm20_device *dev)
>>>>  	unsigned int retry = 3;
>>>>  	int ret;
>>>>
>>>> -	max9271_wake_up(dev->serializer);
>>>> +	max9271_wake_up(&dev->serializer);
>>>>
>>>>  	/* Serial link disabled during config as it needs a valid pixel clock. */
>>>> -	ret = max9271_set_serial_link(dev->serializer, false);
>>>> +	ret = max9271_set_serial_link(&dev->serializer, false);
>>>>  	if (ret)
>>>>  		return ret;
>>>>
>>>> @@ -466,35 +466,35 @@ static int rdacm20_initialize(struct rdacm20_device *dev)
>>>>  	 *  Ensure that we have a good link configuration before attempting to
>>>>  	 *  identify the device.
>>>>  	 */
>>>> -	max9271_configure_i2c(dev->serializer, MAX9271_I2CSLVSH_469NS_234NS |
>>>> -					       MAX9271_I2CSLVTO_1024US |
>>>> -					       MAX9271_I2CMSTBT_105KBPS);
>>>> +	max9271_configure_i2c(&dev->serializer, MAX9271_I2CSLVSH_469NS_234NS |
>>>> +						MAX9271_I2CSLVTO_1024US |
>>>> +						MAX9271_I2CMSTBT_105KBPS);
>>>>
>>>> -	max9271_configure_gmsl_link(dev->serializer);
>>>> +	max9271_configure_gmsl_link(&dev->serializer);
>>>>
>>>> -	ret = max9271_verify_id(dev->serializer);
>>>> +	ret = max9271_verify_id(&dev->serializer);
>>>>  	if (ret < 0)
>>>>  		return ret;
>>>>
>>>> -	ret = max9271_set_address(dev->serializer, dev->addrs[0]);
>>>> +	ret = max9271_set_address(&dev->serializer, dev->addrs[0]);
>>>>  	if (ret < 0)
>>>>  		return ret;
>>>> -	dev->serializer->client->addr = dev->addrs[0];
>>>> +	dev->serializer.client->addr = dev->addrs[0];
>>>>
>>>>  	/*
>>>>  	 * Reset the sensor by cycling the OV10635 reset signal connected to the
>>>>  	 * MAX9271 GPIO1 and verify communication with the OV10635.
>>>>  	 */
>>>> -	ret = max9271_enable_gpios(dev->serializer, MAX9271_GPIO1OUT);
>>>> +	ret = max9271_enable_gpios(&dev->serializer, MAX9271_GPIO1OUT);
>>>>  	if (ret)
>>>>  		return ret;
>>>>
>>>> -	ret = max9271_clear_gpios(dev->serializer, MAX9271_GPIO1OUT);
>>>> +	ret = max9271_clear_gpios(&dev->serializer, MAX9271_GPIO1OUT);
>>>>  	if (ret)
>>>>  		return ret;
>>>>  	usleep_range(10000, 15000);
>>>>
>>>> -	ret = max9271_set_gpios(dev->serializer, MAX9271_GPIO1OUT);
>>>> +	ret = max9271_set_gpios(&dev->serializer, MAX9271_GPIO1OUT);
>>>>  	if (ret)
>>>>  		return ret;
>>>>  	usleep_range(10000, 15000);
>>>> @@ -564,13 +564,7 @@ static int rdacm20_probe(struct i2c_client *client)
>>>>  	if (!dev)
>>>>  		return -ENOMEM;
>>>>  	dev->dev = &client->dev;
>>>> -
>>>> -	dev->serializer = devm_kzalloc(&client->dev, sizeof(*dev->serializer),
>>>> -				       GFP_KERNEL);
>>>> -	if (!dev->serializer)
>>>> -		return -ENOMEM;
>>>> -
>>>> -	dev->serializer->client = client;
>>>> +	dev->serializer.client = client;
>>>>
>>>>  	ret = of_property_read_u32_array(client->dev.of_node, "reg",
>>>>  					 dev->addrs, 2);
>>>
>>