From: Akihiro TSUKADA <tskd08@gmail.com>
To: Antti Palosaari <crope@iki.fi>, linux-media@vger.kernel.org
Cc: mchehab@s-opensource.com
Subject: Re: [PATCH v4] dvb-usb/friio, dvb-usb-v2/gl861: decompose friio and merge with gl861
Date: Fri, 30 Mar 2018 22:21:01 +0900 [thread overview]
Message-ID: <30d0270b-852a-39df-14e5-4c12d59aeac7@gmail.com> (raw)
In-Reply-To: <db8f370c-20f5-e9fe-9d2e-d12c1475dc33@iki.fi>
> I simply cannot see why it cannot work. Just add i2c adapter and
> suitable logic there. Transaction on your example is simply and there is
> no problem to implement that kind of logic to demod i2c adapter.
I might be totally wrong, but...
i2c transactions to a tuner must use:
1. usb_control_msg(request:3) for the first half (write) of reads
2. usb_control_msg(request:1) for the other writes
3. usb_control_msg(request:2) for (all) reads
How can the demod driver control the 'request' argument of USB messages
that are sent to its parent (not to the demod itself),
when the bridge of tc90522 cannot be limited to gl861 (or even to USB) ?
Akihiro
next prev parent reply other threads:[~2018-03-30 13:21 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-27 17:47 [PATCH v4] dvb-usb/friio, dvb-usb-v2/gl861: decompose friio and merge with gl861 tskd08
2018-03-27 23:46 ` Antti Palosaari
2018-03-28 12:37 ` Akihiro TSUKADA
2018-03-28 20:44 ` Antti Palosaari
2018-03-30 13:21 ` Akihiro TSUKADA [this message]
2018-03-30 17:59 ` Antti Palosaari
2018-03-31 15:30 ` Akihiro TSUKADA
2018-03-28 16:45 ` kbuild test robot
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=30d0270b-852a-39df-14e5-4c12d59aeac7@gmail.com \
--to=tskd08@gmail.com \
--cc=crope@iki.fi \
--cc=linux-media@vger.kernel.org \
--cc=mchehab@s-opensource.com \
/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.