Re: writing an alsa driver

From: Jarkko Nikula <jarkko.nikula@intel.com>
To: Liam Girdwood <liam.r.girdwood@linux.intel.com>,
	Michele Curti <michele.curti@gmail.com>
Cc: Takashi Iwai <tiwai@suse.de>, Bard Liao <bardliao@realtek.com>,
	Luka Karinja <luka.karinja@gmail.com>,
	"Koul, Vinod" <vinod.koul@intel.com>,
	alsa-devel@alsa-project.org
Subject: Re: writing an alsa driver
Date: Wed, 17 Jun 2015 09:39:24 +0300	[thread overview]
Message-ID: <5581161C.1060508@intel.com> (raw)
In-Reply-To: <1434387868.2434.50.camel@loki>

Hi

On 06/15/2015 08:04 PM, Liam Girdwood wrote:
> We are also a little suspicious that this laptop is using SSP1 for the
> I2S audio connection to the codec. The bad news is that the FW used by
> this BYT ADSP driver does not support the SSP1 port. It's hard coded to
> use SSP0 (Jarrko, please correct the port numbering if it's wrong).
> There are going to be no further releases of this FW.
>
That firmware is hardcoded for SSP2, i.e. 3rd port and low-pin count 
Baytrail packages have only 2 SSP ports. Obviously machines using those 
variants have to use either SSP0 or SSP1.

Please see pages 29-30 for Baytrail package differences:
https://www-ssl.intel.com/content/www/us/en/processors/atom/atom-z36xxx-z37xxx-datasheet-vol-1.html

-- 
Jarkko
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