linux-kernel - Re: [PATCH] media: i2c: tvp514x: add support for asynchronous probing

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Message-ID: <CA+V-a8tziXOAU6NNUy6rp-Fdz2sVk8+KYHdzDsVSaFuRADUjig@mail.gmail.com>
Date:	Mon, 24 Jun 2013 13:54:02 +0530
From:	Prabhakar Lad <prabhakar.csengg@...il.com>
To:	Hans Verkuil <hverkuil@...all.nl>
Cc:	Guennadi Liakhovetski <g.liakhovetski@....de>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	LMML <linux-media@...r.kernel.org>,
	Hans Verkuil <hans.verkuil@...co.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	DLOS <davinci-linux-open-source@...ux.davincidsp.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Sakari Ailus <sakari.ailus@....fi>
Subject: Re: [PATCH] media: i2c: tvp514x: add support for asynchronous probing

Hi Hans,

On Mon, Jun 24, 2013 at 12:41 PM, Hans Verkuil <hverkuil@...all.nl> wrote:
> On Sun June 23 2013 17:48:20 Prabhakar Lad wrote:
>> Hi Guennadi,
>>
>> Thanks for the review.
>>
>> On Sun, Jun 23, 2013 at 8:49 PM, Guennadi Liakhovetski
>> <g.liakhovetski@....de> wrote:
>> > On Sat, 22 Jun 2013, Prabhakar Lad wrote:
>> >
>> >> From: "Lad, Prabhakar" <prabhakar.csengg@...il.com>
>> >>
>> >> Both synchronous and asynchronous tvp514x subdevice probing is supported by
>> >> this patch.
>> >>
>> >> Signed-off-by: Prabhakar Lad <prabhakar.csengg@...il.com>
>> >> Cc: Guennadi Liakhovetski <g.liakhovetski@....de>
>> >> Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>
>> >> Cc: Hans Verkuil <hverkuil@...all.nl>
>> >> Cc: Sakari Ailus <sakari.ailus@....fi>
>> >> Cc: Mauro Carvalho Chehab <mchehab@...hat.com>
>> >> ---
>> >>  drivers/media/i2c/tvp514x.c |   22 +++++++++++++++-------
>> >>  1 file changed, 15 insertions(+), 7 deletions(-)
>> >>
>> >> diff --git a/drivers/media/i2c/tvp514x.c b/drivers/media/i2c/tvp514x.c
>> >> index 864eb14..d090caf 100644
>> >> --- a/drivers/media/i2c/tvp514x.c
>> >> +++ b/drivers/media/i2c/tvp514x.c
>> >> @@ -36,6 +36,7 @@
>> >>  #include <linux/module.h>
>> >>  #include <linux/v4l2-mediabus.h>
>> >>
>> >> +#include <media/v4l2-async.h>
>> >>  #include <media/v4l2-device.h>
>> >>  #include <media/v4l2-common.h>
>> >>  #include <media/v4l2-mediabus.h>
>> >
>> > Ok, but this one really does too many things in one patch:
>> >
>> >> @@ -1148,9 +1149,9 @@ tvp514x_probe(struct i2c_client *client, const struct i2c_device_id *id)
>> >>       /* Register with V4L2 layer as slave device */
>> >>       sd = &decoder->sd;
>> >>       v4l2_i2c_subdev_init(sd, client, &tvp514x_ops);
>> >> -     strlcpy(sd->name, TVP514X_MODULE_NAME, sizeof(sd->name));
>> >>
>> >>  #if defined(CONFIG_MEDIA_CONTROLLER)
>> >> +     strlcpy(sd->name, TVP514X_MODULE_NAME, sizeof(sd->name));
>> >
>> > This is unrelated
>> >
>> OK I'll split the patch or may be a line in a commit message can do ?
>
> Please split it up in two patches.
>
> Why is sd->name set anyway? And why is it moved under CONFIG_MEDIA_CONTROLLER?
> It's not obvious to me.
>
while using tvp514x subdev with media controller based drivers, when we
enumerate entities (MEDIA_IOC_ENUM_ENTITIES) to get the index id
of the entity we compare the entity name with "tvp514x", So I moved it
under CONFIG_MEDIA_CONTROLLER config. I hope you are OK with
moving this in a separate patch.

Regards,
--Prabhakar Lad
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