[alsa-devel] Loading coefficients for Audio IP

[Vinod Koul]

On 19-12-18, 14:21, Takashi Iwai wrote:
> 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 ;)

Yeah and a deprecated solution exists. Daniel you *can* use TLV_BYTES
which allow you to load any size bytes into kernel using a kcontrol.

Again, it is deprecated and we are supposed to come with a cooler
solution, so you would need to move then as well

-- 
~Vinod