On Fri, Dec 01, 2017 at 09:03:25PM +0100, Takashi Iwai wrote: > > >> FIXME: > > >> - KConfig changes does not look right, but I could not think of any proper > > >> way without making changes into legacy HDA codec driver. So need some > > >> help on this topic. > > > > > > And this is another big issue. As long as you don't allow build both, > > > it never flies with distros, and it means no dramatic improvement of > > > the situation, either. > > > > > > IOW, we have to make the codec driver working on both controller/bus > > > implementations, and it essentially means to rewrite the HD-audio > > > codec plumbing code. Currently, it's a kind of half-baked state, and > > > we need to cast to unified form. > > > > Before going into codec support, should we first deal with the > > selection of the ASoC/Legacy mode for the controller side of things? > > Even with basic HDMI/iDisp cases, we don't have a clean solution > > today. When I worked on the late Joule platform, there was no fallback > > mode which forced a recompilation depending on BIOS settings. > > My understanding is that there is no support for multiple drivers > > registering for the same PCI ID, I believe we'll have to define a > > top-level wrapper which arbitrates internally based on BIOS settings > > and user/distro preferences which mode is selected. > > True, we need to sort out that. But the selection of the card-level > driver can be relatively easily done in a manual way, either via > blacklisting or by common module options. Currently AMDGPU and radeon > drivers are in such situation, for example. > > A common single switch, or at best the automatic arbitration would be > preferred, of course, though. The switch is again short term as we should progress and move towards one solution whilst deprecating the other, so that way this makes a simple solution and helps in transition, change flag defaults and deprecate. -- ~Vinod _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
