From: Daniel Ribeiro <drwyrm@gmail.com>
To: Mark Brown <broonie@sirena.org.uk>
Cc: alsa-devel@alsa-project.org, Liam Girdwood <lrg@kernel.org>
Subject: Re: ASoC: pxa2xx-ssp
Date: Thu, 30 Oct 2008 10:24:14 -0200 [thread overview]
Message-ID: <1225369454.12583.38.camel@brutus> (raw)
In-Reply-To: <20081030120634.GD5747@sirena.org.uk>
Em Qui, 2008-10-30 às 12:06 +0000, Mark Brown escreveu:
> On Thu, Oct 30, 2008 at 09:40:17AM -0200, Daniel Ribeiro wrote:
>
> > Here are my test results for stereo S16_LE audio:
>
> > set_tdm_slot(cpu_dai, 1, 2), SSCR0_Datasize(16):
> > Only left channel works.
+ Silent output on right channel.
>
> > set_tdm_slot(cpu_dai, 2, 2), SSCR0_Datasize(16):
> > No I/O.
>
> Could you expand on what you mean by "No I/O" here - do you get silent
> output or does DMA not work either?
DMA dont work.
>
> > set_tdm_slot(cpu_dai, 3, 2), SSCR0_Datasize(16):
> > Only left channel works.
+ Silent output on right channel.
>
> > set_tdm_slot(cpu_dai, 1, 1), SSCR0_Datasize(16) | SSCR0_EDSS:
> > Both channels work.
>
> Just a thought, but you should also be able to get things working by
> adding a constraint on the format in your machine driver to force use of
> 32 bit - see things like the WM8903 driver for examples of how to this.
> Ideally that shouldn't be required, though.
I havent tried this yet, but if I set the codec driver to S32_LE
shouldnt it change the audio data format? According to the information I
have on this codec it only works with 16 bits audio format.
>
> > On my board CLK and FRM are driven by the codec, pxa is slave. I have
> > no specs for the codec, only a 2.4 kernel driver that works with
> > (SSCR0_Datasize(16) | SSCR0_EDSS | SSCR0_SlotsPerFrm(1)).
>
> Which codec is this? Could you post the driver?
Its a motorola ASIC called PCAP2, it does a lot more than sound, and is
used on almost all Motorola phones (including WinCE and P2K phones) from
2004~2007.
http://git.openezx.org/?p=openezx.git;a=blob;f=sound/soc/codecs/pcap2.c;h=d5cf7d2e34a8565ed0e91094ee63f40236bb0b75;hb=18aeb9d03c0969b68fada1913b4d72ca8f47a912
>
> BTW, your mail client is doing some really strange indentation here
> and indenting the first line of each paragraph by a tab which looks like
> how some other clients do quotation.
Sorry, im used to indent each paragraph with a tab, its not my mail
client, its me. :)
--
Daniel Ribeiro
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prev parent reply other threads:[~2008-10-30 12:27 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-24 0:54 ASoC: pxa2xx-ssp Daniel Ribeiro
2008-10-24 15:54 ` Liam Girdwood
2008-10-24 18:14 ` Mark Brown
2008-10-25 5:32 ` Daniel Ribeiro
2008-10-27 12:47 ` Mark Brown
2008-10-27 13:19 ` Daniel Ribeiro
2008-10-27 13:44 ` Mark Brown
2008-10-30 11:40 ` Daniel Ribeiro
2008-10-30 12:06 ` Mark Brown
2008-10-30 12:24 ` Daniel Ribeiro [this message]
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