Re: [PATCH] ASoC: Intel: hdac_hdmi: add Icelake support

[Takashi Iwai <tiwai@suse.de>]

On Mon, 12 Nov 2018 15:00:36 +0100,
Pierre-Louis Bossart wrote:
> 
> And btw the big topic is still how we provide distributions the means
> to handle a 'graceful' fallback from DSP-enabled solutions (SST or
> SOF) to legacy HDAudio, it's already popped up for cases where we have
> HDaudio solutions with DMICs.

Yeah, that's a long-standing problem.  I've experimented some
scenarios in the past, and the conclusion is that there is no really
working fallback mechanism in general in Linux driver binding.
That is, the only reasonable way seems to make a dedicated driver for
the specific PCI ID (SKL+) doing the probe-and-fallback by itself,
while excluding these IDs from other existing driver entries.

I'd love to proceed this but unfortunately I have no machine that can
run SKL+ SST driver right now.  I have a new CFL devel box, but it has
no support (PCI ID 8086:a348) as well as no firmware...


thanks,

Takashi