[alsa-devel] Loading coefficients for Audio IP

[Takashi Iwai]

On Wed, 19 Dec 2018 09:46:37 +0100,
Daniel Baluta wrote:
> 
> Hello Pierre, Liam, Mark,
> 
> What is the standard ALSA way of loading tables of coefficients for
> various audio IPs?
> 
> We have IPs like PDM or ASRC which need large table of coefficients
> depending on configuration. This tables can reach up to 120K in size.
> 
> Creating this kind of tables as arrays of integers in kernel doesn't seem
> to be a common used solution and we will end up with large files that
> contains only numbers.
> 
> Another approach that we are thinking of is to create and compile this
> tables in userspace as raw binary files and then loading them in kernel
> using the firmware interface.
> 
> Would this be an acceptable approach?

This is a topic we discuss every year in the conference ;)


Takashi