linux-kernel - Re: [PATCH RFC v3] media: OF: add video sync endpoint property

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CA+V-a8sxnMkdgrqD=GWYx-7K8UviOKNtvxfw=TMOUWaLWrks=g@mail.gmail.com>
Date:	Fri, 12 Jul 2013 09:59:54 +0530
From:	Prabhakar Lad <prabhakar.csengg@...il.com>
To:	Sylwester Nawrocki <sylvester.nawrocki@...il.com>
Cc:	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>,
	Guennadi Liakhovetski <g.liakhovetski@....de>,
	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Sakari Ailus <sakari.ailus@....fi>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Rob Landley <rob@...dley.net>,
	devicetree-discuss@...ts.ozlabs.org, linux-doc@...r.kernel.org,
	Kyungmin Park <kyungmin.park@...sung.com>
Subject: Re: [PATCH RFC v3] media: OF: add video sync endpoint property

Hi Sylwester,

On Fri, Jul 12, 2013 at 2:45 AM, Sylwester Nawrocki
<sylvester.nawrocki@...il.com> wrote:
> On 07/11/2013 01:41 PM, Prabhakar Lad wrote:
> [...]
>
>>>> diff --git a/drivers/media/v4l2-core/v4l2-of.c
>>>> b/drivers/media/v4l2-core/v4l2-of.c
>>>> index aa59639..1a54530 100644
>>>> --- a/drivers/media/v4l2-core/v4l2-of.c
>>>> +++ b/drivers/media/v4l2-core/v4l2-of.c
>>>> @@ -100,6 +100,26 @@ static void v4l2_of_parse_parallel_bus(const struct
>>>> device_node *node,
>>>>          if (!of_property_read_u32(node, "data-shift",&v))
>>>>                  bus->data_shift = v;
>>>>
>>>> +       if (!of_property_read_u32(node, "video-sync",&v)) {
>>>> +               switch (v) {
>>>> +               case V4L2_MBUS_VIDEO_SEPARATE_SYNC:
>>>> +                       flags |= V4L2_MBUS_VIDEO_SEPARATE_SYNC;
>>>
>>>
>>>
>>> I'm not convinced all those video sync types is something that really
>>> belongs
>>> to the flags field. In my understanding this field is supposed to hold
>>> only
>>> the _signal polarity_ information.
>>>
>>>
>> Ok, so there should be a function say v4l2_of_parse_signal_polarity()
>> to get the polarity alone then.
>
>
> I don't think this is required, I would just extend
> v4l2_of_parse_parallel_bus()
> function to also handle sync-on-green-active property.
>
If that is the case than I have to add a member say 'signal_polarity'
in struct v4l2_of_bus_parallel and assign the polarity to it.
Let me know if you are OK with it.

Regards,
--Prabhakar Lad
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/