Messages in this thread | | | Subject | Re: [GIT PULL] sound updates for 4.15-rc1 | From | Pierre-Louis Bossart <> | Date | Thu, 16 Nov 2017 08:55:35 -0600 |
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On 11/15/17 1:34 AM, Takashi Iwai wrote: > [Adding more people and alsa-devel to Cc] > > On Wed, 15 Nov 2017 03:40:09 +0100, > Linus Torvalds wrote: >> >> On Tue, Nov 14, 2017 at 6:51 AM, Takashi Iwai <tiwai@suse.de> wrote: >>> >>> please pull sound updates for v4.15-rc1 from: >> >> Hmm. Making "oldconfig" on my laptop with this, my >> SND_SOC_INTEL_SKYLAKE went away. >> >> And the reason seems to be that new SND_SOC_INTEL_SST_TOPLEVEL config option. >> >> Which has no help associated with it. >> >> This is not a friendly thing to do to people. It basically breaks >> existing setups for no documented reason, and with no explanation. >> >> Please fix the config situation. At the very least, add documentation. > > Sorry about that. I saw Vinod already submitted a patch to add the > help text to CONFIG_SND_SOC_INTEL_SST_TOPLEVEL, so the least fix > should go in soon. > > But now looking at these changes, I noticed a few things, too: > > - With the introduction of SND_SOC_INTEL_SST_TOPLEVEL, keeping > SND_SOC_INTEL_COMMON and SND_SOC_INTEL_MACH individually doesn't > make much sense. They can be dropped and replaced with > SND_SOC_INTEL_SST_TOPLEVEL as a further cleanup. > > - ... or, make SND_SOC_INTEL_SST_TOPLEVEL=y as default, if this is > considered to be a top-level filter config (like the network vendor > kconfig items). In that case, the reverse-selection of > SND_SOC_INTEL_COMMON and SND_SOC_INTEL_MACH should be avoided, but > they should be selected from the actual drivers instead.
This level was introduced as a shortcut to help select the platform drivers associated with the closed-source audio firmware. There will be a follow-up set of patches coming soon, and we'll need to have the corresponding top-level selector for the drivers handling the open-source audio firmware. Please don't make too many assumptions on this SND_SOC_INTEL_SST_TOPLEVEL, it is not going to be true for everyone moving forward.
If you want look at the Kconfig setup, the latest code cherry-picked on top of v4.14 is here https://github.com/plbossart/sound/tree/backport/intel-audio-stable-v4.14
the menuconfig options are still in device drivers/sound/ASoC but now you have SST and SOF menus.
> > > And I believe there are a few more possible cleanups / fixes in the > messy Intel ASoC Kconfigs. For example, SND_SOC_INTEL_SST is almost > always set. The only exception is via SND_SST_ATOM_HIFI2_PLATFORM. > But all machine drivers using Atom Hifi2 do set SND_SST_IPC_ACPI, > which also requires SND_SOC_INTEL_SST. > > Further looking at this, we see that the only entry that does *not* > require SND_SOC_INTEL_SST is the case with SND_MFLD_MACHINE in > sound/soc/intel/boards. And now more interesting part -- there is no > corresponding entry in Makefile. That is, this kconfig is effectively > dead! The source code mfld_machine.c exists, but it's just a place > holder now. The code was supposed to be integrated into atom > directory by the commit b97169da0699, but it seems forgotten to be > updated. > > Hmm... > > > Takashi >
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