From: Antti Palosaari <crope@iki.fi>
To: "Antti Seppälä" <a.seppala@gmail.com>,
"Benjamin Larsson" <benjamin@southpole.se>
Cc: linux-media@vger.kernel.org
Subject: Re: [RFC PATCH] mn88472: reduce firmware download chunk size
Date: Thu, 19 Feb 2015 17:38:32 +0200 [thread overview]
Message-ID: <54E60378.6030604@iki.fi> (raw)
In-Reply-To: <CAKv9HNaSqgFpC+TmMm86Y7mrgXvZ9U+wqdgjM4n=hf80p2W1jg@mail.gmail.com>
On 02/19/2015 12:21 PM, Antti Seppälä wrote:
> On 19 February 2015 at 11:43, Benjamin Larsson <benjamin@southpole.se> wrote:
>> On 2015-02-19 10:13, Antti Seppälä wrote:
>>>
>>> It seems that currently the firmware download on the mn88472 is
>>> somehow wrong for my Astrometa HD-901T2.
>>>
>>> Reducing the download chunk size (mn88472_config.i2c_wr_max) to 2
>>> makes the firmware download consistently succeed.
>>>
>>
>>
>> Hi, try adding the workaround patch I sent for this.
>>
>> [PATCH 1/3] rtl28xxu: lower the rc poll time to mitigate i2c transfer errors
>>
>> I now see that it hasn't been merged. But I have been running with this
>> patch for a few months now without any major issues.
>>
>
> The patch really did improve firmware loading. Weird...
>
> Even with it I still get occasional i2c errors from r820t:
>
> [ 15.874402] r820t 8-003a: r820t_write: i2c wr failed=-32 reg=0a len=1: da
> [ 81.455517] r820t 8-003a: r820t_read: i2c rd failed=-32 reg=00
> len=4: 69 74 e6 df
> [ 99.949702] r820t 8-003a: r820t_read: i2c rd failed=-32 reg=00
> len=4: 69 74 e6 df
>
> These errors seem to appear more often if I'm reading the signal
> strength values using e.g. femon.
Could you disable whole IR polling and test
modprobe dvb_usb_v2 disable_rc_polling=1
It is funny that *increasing* RC polling makes things better, though...
regards
Antti
--
http://palosaari.fi/
next prev parent reply other threads:[~2015-02-19 15:38 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-19 9:13 [RFC PATCH] mn88472: reduce firmware download chunk size Antti Seppälä
2015-02-19 9:43 ` Benjamin Larsson
2015-02-19 10:21 ` Antti Seppälä
2015-02-19 11:53 ` Benjamin Larsson
2015-02-19 15:38 ` Antti Palosaari [this message]
2015-02-19 16:01 ` Antti Seppälä
2015-02-19 16:14 ` Antti Palosaari
2015-02-19 16:25 ` Steven Toth
2015-02-19 16:44 ` Antti Palosaari
2015-02-19 18:42 ` Antti Seppälä
2015-02-19 20:32 ` Antti Palosaari
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=54E60378.6030604@iki.fi \
--to=crope@iki.fi \
--cc=a.seppala@gmail.com \
--cc=benjamin@southpole.se \
--cc=linux-media@vger.kernel.org \
/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.