From: Pavel Hofman <pavel.hofman@insite.cz>
To: Takashi Iwai <tiwai@suse.de>
Cc: alsa-devel@alsa-project.org
Subject: Re: MIDI on ice1724 - preliminary findings and questions
Date: Wed, 23 Apr 2008 13:08:10 +0200 [thread overview]
Message-ID: <480F189A.7030500@insite.cz> (raw)
In-Reply-To: <s5h63u8evih.wl%tiwai@suse.de>
Takashi Iwai wrote:
> At Tue, 22 Apr 2008 22:23:55 +0200,
> Pavel Hofman wrote:
>> Hi,
>>
...........
>>
>> After the playback stops, the interrupts are gone too. It seems as if
>> the playback interrupt initiates the MPU TX interrupt.
>>
>> If we could avoid generating the MPU TX interrupt during regular
>> playback, I believe the major problem would be resolved.
>>
>> Even if I mask the interrupts (CCS01) and do not explicitly unmask them
>> (according to proc ice1724 the CCS01 register stays at 0xa0), the
>> interrupt gets generated.
>
> OK, then the simplest way would be to just ignore the TX bit at the
> second or later check.
>
> How about the patch below?
Takashi, thanks for the hack idea. The overhead is just one more loop
which is nothing. I will test it and post details of further problems
(there is a bunch of them :) )
Pavel.
next prev parent reply other threads:[~2008-04-23 11:08 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-22 20:23 MIDI on ice1724 - preliminary findings and questions Pavel Hofman
2008-04-23 10:05 ` Takashi Iwai
2008-04-23 11:08 ` Pavel Hofman [this message]
2008-04-23 20:19 ` MIDI on ice1724 - long delays Pavel Hofman
2008-04-24 16:29 ` Takashi Iwai
2008-04-24 20:47 ` Pavel Hofman
2008-04-25 6:22 ` Takashi Iwai
2008-04-25 7:06 ` MIDI on ice1724 - fixing HG Pavel Hofman
2008-04-25 7:10 ` Takashi Iwai
2008-04-25 7:25 ` Pavel Hofman
2008-04-30 20:07 ` MIDI on ice1724 - real-time kernel problem Pavel Hofman
2008-05-02 12:43 ` Takashi Iwai
2008-05-03 19:12 ` Pavel Hofman
2008-05-07 10:25 ` Takashi Iwai
2008-05-08 19:35 ` Pavel Hofman
2008-05-15 7:21 ` Clemens Ladisch
2008-05-15 9:00 ` Takashi Iwai
2008-05-18 20:02 ` PATCH - MIDI on ice1724 - real-time kernel problem SOLVED Pavel Hofman
2008-05-20 8:44 ` Clemens Ladisch
2008-05-20 19:15 ` Pavel Hofman
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