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Date: Thu, 17 Jun 2021 10:12:26 +0200
From: Hans Verkuil <hverkuil-cisco@...all.nl>
To: Jacopo Mondi <jacopo@...ndi.org>
Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Jacopo Mondi <jacopo+renesas@...ndi.org>,
kieran.bingham+renesas@...asonboard.com,
niklas.soderlund+renesas@...natech.se, geert@...ux-m68k.org,
Mauro Carvalho Chehab <mchehab@...nel.org>,
linux-media@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 12/15] media: i2c: rdacm20: Embed 'serializer' field
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@...ndi.org>
>>>> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
>>>> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.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);
>>>
>>
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