From: Javier Martinez Canillas <javier@osg.samsung.com>
To: Wolfram Sang <wsa@the-dreams.de>
Cc: Tony Lindgren <tony@atomide.com>,
linux-i2c@vger.kernel.org,
Mauro Carvalho Chehab <mchehab@osg.samsung.com>,
Linux Media Mailing List <linux-media@vger.kernel.org>,
linux-pm@vger.kernel.org, Alan Stern <stern@rowland.harvard.edu>
Subject: Re: tvp5150 regression after commit 9f924169c035
Date: Thu, 14 Apr 2016 10:27:34 -0400 [thread overview]
Message-ID: <570FA8D6.5070308@osg.samsung.com> (raw)
In-Reply-To: <20160414141945.GA1539@katana>
Hello Wofram,
On 04/14/2016 10:19 AM, Wolfram Sang wrote:
>
>> Yes, I also wonder why I'm the only one facing this issue... maybe no one
>> else is using the tvp5150 driver on an OMAP board with mainline?
>
> I wonder why it only affects tvp5150. I don't see the connection yet.
>
Yes, me neither. All other I2C devices are working properly on this board.
The only thing I can think, is that the tvp5150 needs a reset sequence in
order to be operative. It basically toggles two pins in the chip, this is
done in tvp5150_init() [0] and is needed before accessing I2C registers.
Maybe runtime pm has an effect on this and the chip is not reset correctly?
[0]: https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/tree/drivers/media/i2c/tvp5150.c#n1311
Best regards,
--
Javier Martinez Canillas
Open Source Group
Samsung Research America
next prev parent reply other threads:[~2016-04-14 14:27 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-03 13:46 tvp5150 regression after commit 9f924169c035 Javier Martinez Canillas
2016-02-03 14:23 ` Wolfram Sang
2016-02-03 14:42 ` Javier Martinez Canillas
2016-02-08 10:54 ` Wolfram Sang
2016-02-12 22:09 ` Javier Martinez Canillas
2016-02-12 22:13 ` Tony Lindgren
2016-02-12 22:28 ` Javier Martinez Canillas
2016-02-12 22:40 ` Tony Lindgren
2016-02-12 23:08 ` Javier Martinez Canillas
2016-02-12 23:46 ` Tony Lindgren
2016-02-13 2:47 ` Javier Martinez Canillas
2016-04-12 22:32 ` Wolfram Sang
2016-04-13 22:39 ` Javier Martinez Canillas
2016-04-14 11:12 ` Wolfram Sang
2016-04-14 13:41 ` Javier Martinez Canillas
2016-04-14 14:19 ` Wolfram Sang
2016-04-14 14:27 ` Javier Martinez Canillas [this message]
2016-04-14 15:12 ` Tony Lindgren
2016-04-14 23:59 ` Javier Martinez Canillas
2016-04-15 14:58 ` Tony Lindgren
2016-04-15 16:48 ` Javier Martinez Canillas
2016-04-15 17:08 ` Tony Lindgren
2016-02-12 22:22 ` Wolfram Sang
2016-02-12 22:26 ` Javier Martinez Canillas
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=570FA8D6.5070308@osg.samsung.com \
--to=javier@osg.samsung.com \
--cc=linux-i2c@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=mchehab@osg.samsung.com \
--cc=stern@rowland.harvard.edu \
--cc=tony@atomide.com \
--cc=wsa@the-dreams.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.