[alsa-devel] Embedded I2S / 192khz

[Andrew Paprocki]

Has anyone heard of this BridgeCo DM850 chip? It seems powerful, but
I'm not sure if there is any ALSA support from the company.. from the
datasheet:

"There are up to four Audio I/O ports, each with four I2S/I8S
interfaces operating at up to 192 kHz in both I2S and I8S
modes.

There are up to eight SPDIF interfaces operating at up to
192 kHz."

http://www.bridgeco.com/pdfs/850/adp_dm850_02_pma_chip-overv.pdf

-Andrew

On Thu, May 8, 2008 at 10:22 AM, Liam Girdwood
<lg at opensource.wolfsonmicro.com> wrote:
> On Thu, 2008-05-08 at 15:08 +0100, Mark Brown wrote:
>> On Thu, May 08, 2008 at 09:50:32AM -0400, Andrew Paprocki wrote:
>>
>> > Is anyone aware of a Linux/ALSA capable chip that can drive 192khz
>> > I2S? I poked through the ASoC code and could only see 96khz
>> > capability.
>>
>> The PowerPC code in sound/soc/fsl (as of 2.6.25) supports up to 192kHz,
>> though it appears to require the codec to clock the bus.  The SuperH and
>> Alchemy code in:
>>
>>    git://opensource.wolfsonmicro.com/linux-2.6-asoc
>>
>> says they support up to 192kHz too.  PXA3xx should support this too when
>> it's done.
>
> heh, shows how much attention I've been paying lately to commits.
>
> PX2xx (SSP) and i.MX3x (SSI) should also do 192kHz too. Interestingly
> pxa2xx I2S almost manages (datasheet max is 48kHz) 192kHz but underruns
> a bit!
>
>