linux-kernel - Re: [PATCH 15/22] media: imx7-media-csi: Create media links in bound notifier

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Date:   Mon, 2 Sep 2019 14:37:38 -0700
From:   Steve Longerbeam <slongerbeam@...il.com>
To:     Rui Miguel Silva <rmfrfs@...il.com>
Cc:     linux-media@...r.kernel.org,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        "open list:STAGING SUBSYSTEM" <devel@...verdev.osuosl.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 15/22] media: imx7-media-csi: Create media links in bound
 notifier

Hi Rui,

On 9/2/19 2:38 AM, Rui Miguel Silva wrote:
> Hi Steve,
> On Tue 06 Aug 2019 at 00:34, Steve Longerbeam wrote:
>> Implement a notifier bound op to register media links from the remote
>> sub-device's source pad(s) to the CSI sink pad.
>>
>> Signed-off-by: Steve Longerbeam <slongerbeam@...il.com>
>> ---
>>   drivers/staging/media/imx/imx7-media-csi.c | 24 ++++++++++++++++++++++
>>   1 file changed, 24 insertions(+)
>>
>> diff --git a/drivers/staging/media/imx/imx7-media-csi.c b/drivers/staging/media/imx/imx7-media-csi.c
>> index a1c96c52a606..f71ac485f780 100644
>> --- a/drivers/staging/media/imx/imx7-media-csi.c
>> +++ b/drivers/staging/media/imx/imx7-media-csi.c
>> @@ -196,6 +196,11 @@ struct imx7_csi {
>>   	struct completion last_eof_completion;
>>   };
>>
>> +static inline struct imx7_csi *notifier_to_dev(struct v4l2_async_notifier *n)
>>
> As the other one add the namespace for the function name:
> imx7_csi_notifier_to_dev
>
> other than this, looks good to me.

Thanks for the review. I will make those changes in next rev.

Steve

>
>
>> +{
>> +	return container_of(n, struct imx7_csi, notifier);
>> +}
>> +
>>   static u32 imx7_csi_reg_read(struct imx7_csi *csi, unsigned int offset)
>>   {
>>   	return readl(csi->regbase + offset);
>> @@ -1173,6 +1178,23 @@ static int imx7_csi_parse_endpoint(struct device *dev,
>>   	return fwnode_device_is_available(asd->match.fwnode) ? 0 : -EINVAL;
>>   }
>>
>> +static int imx7_csi_notify_bound(struct v4l2_async_notifier *notifier,
>> +				 struct v4l2_subdev *sd,
>> +				 struct v4l2_async_subdev *asd)
>> +{
>> +	struct imx7_csi *csi = notifier_to_dev(notifier);
>> +	struct media_pad *sink = &csi->sd.entity.pads[IMX7_CSI_PAD_SINK];
>> +
>> +	return media_create_fwnode_pad_links(sink,
>> +					     dev_fwnode(csi->sd.dev),
>> +					     &sd->entity,
>> +					     dev_fwnode(sd->dev), 0);
>> +}
>> +
>> +static const struct v4l2_async_notifier_operations imx7_csi_notify_ops = {
>> +	.bound = imx7_csi_notify_bound,
>> +};
>> +
>>   static int imx7_csi_probe(struct platform_device *pdev)
>>   {
>>   	struct device *dev = &pdev->dev;
>> @@ -1253,6 +1275,8 @@ static int imx7_csi_probe(struct platform_device *pdev)
>>
>>   	v4l2_async_notifier_init(&csi->notifier);
>>
>> +	csi->notifier.ops = &imx7_csi_notify_ops;
>> +
>>   	ret = v4l2_async_register_fwnode_subdev(&csi->sd, &csi->notifier,
>>   						sizeof(struct v4l2_async_subdev),
>>   						NULL, 0,