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