[alsa-devel] [PATCH 0/7] ASoC: Intel: Add support for Baytrail SST DSP

Liam Girdwood liam.r.girdwood at linux.intel.com
Mon Feb 24 21:16:01 CET 2014

On Mon, 2014-02-24 at 17:26 +0200, Jarkko Nikula wrote:
> This set adds support for Baytrail SST DSP with RT5640 based machine
> driver. Design is quite similar and is actually inherited from Intel
> Haswell SST DSP drivers that were posted recently. Reason for another
> implementation is that there are more differences than similarities
> between Haswell and Baytrail.
> First difference comes from the SHIM registers that are 32-bit on
> Haswell and 64-bit on Baytrail. Also memory map and message mailbox is
> different. Second difference is message passing and message headers
> between host and SST DSP. For instance the DSP notifies the host using
> different SHIM registers and bits than on Haswell.
> Biggest difference comes from the DSP firmware. It has different IPC
> messages, stream setup and how DMA pointer is tracked. Currently
> firmware has less features than Haswell DSP firmware and it doesn't
> support compress offload and volume controls support.
> The RT5640 based machine driver is for our customer reference boards
> but at quick test it appears to work on Asus T100 too. Note currently
> the SST is the I2S master on this machine driver and codec is set to
> use I2C BCLK as it's input clock.
> Jarkko Nikula (7):
>   ASoC: Intel: Add Baytrail SST ID and Baytrail specific register bits
>   ASoC: Intel: Add Intel Baytrail SST DSP support
>   ASoC: Intel: Add Intel Baytrail SST DSP IPC support
>   ASoC: Intel: Add Intel Baytrail SST PCM platform driver
>   ASoC: Intel: Add machine driver for Baytrail SST with RT5640 codec
>   ASoC: Intel: Add Baytrail SST and byt-rt5640 machine driver probing
>   ASoC: Intel: Add build support for Baytrail SST


Acked-by: Liam Girdwood <liam.r.girdwood at intel.com>

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