Dne 11. 03. 21 v 6:50 Chris Chiu napsal(a): > On Tue, Mar 9, 2021 at 11:29 PM Cezary Rojewski > <cezary.rojewski@xxxxxxxxx> wrote: >> >> On 2021-03-09 1:19 PM, Chris Chiu wrote: >>> Hi Guys, >>> We have received reports that on some Kabylake laptops (Acer Swift >>> SF314-54/55 and Lenovo Yoga C930...etc), all sound cards no longer be >>> detected after upgrade to kernel later than 5.8. These laptops have >>> one thing in common, all of them have Realtek audio codec and connect >>> the internal microphone to DMIC of the Intel SST controller either >>> [8086:9d71] or [8086:9dc8]. Please refer to >>> https://bugzilla.kernel.org/show_bug.cgi?id=201251#c246 and >>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1915117. >>> >>> From the dmesg from kernel 5.8, the sound related parts only show >>> as follows but the expected snd_hda_codec_realtek and the snd_soc_skl >>> are not even loaded then. >>> [ 13.357495] snd_hda_intel 0000:00:1f.3: DSP detected with PCI >>> class/subclass/prog-if info 0x040100 >>> [ 13.357500] snd_hda_intel 0000:00:1f.3: Digital mics found on >>> Skylake+ platform, using SST driver >>> >>> Building the kernel with the CONFIG_SND_SOC_INTEL_KBL removed can >>> load the snd_hda_codec_realtek successfully and the pulseaudio and >>> alsa-utils can detect the sound cards again. The result of bisecting >>> between kernel 5.4 and 5.8 also get similar result, reverting the >>> commit "ALSA: hda: Allow SST driver on SKL and KBL platforms with >>> DMIC" can fix the issue. I tried to generate the required firmware for >>> snd_soc_skl but it did not help. Please refer to what I did in >>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1915117/comments/14 >>> and https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1915117/comments/18. >>> >>> Since the skl_hda_dsp_generic-tplg.bin and dfw_sst.bin are not in >>> the linux-firmware. The Intel SST support for Skylake family is not >>> yet complete. Can we simply revert the "ALSA: hda: Allow SST driver on >>> SKL and KBL platforms with DMIC" in the current stage and wait for SOF >>> support for Skylake family? Or please suggest a better solution for >>> this. Thanks >>> >>> Chris >>> >> >> Hello Chris, >> >> Guide: "Linux: HDA+DMIC with skylake driver" [1] should help >> understanding history behind the problem as well as fixing it. >> >> Upstream skylake driver - snd_soc_skl - is intended to support HDA DSP + >> DMIC configuration via means of snd_soc_skl_hda_dsp machine board >> driver. You _may_ switch to legacy HDAudio driver - snd_hda_intel - >> losing DMIC support in the process. To remove any confusion - for >> Skylake and Kabylake platforms, snd_soc_skl is your option. >> >> Now, due to above, I doubt any skylake-related topology has ever been >> upstreamed to linux-firmware as a) most boards are I2S-based, these are >> used by our clients which we support via separate channel b) hda >> dsp+dmic support on linux for missing until early 2020. >> >> Topologies for most common skylake driver configurations: >> - skl/kbl with i2s rt286 >> - apl/glk with i2s rt298 >> - <any> with hda dsp >> can be found in alsa-topology-conf [2]. >> >> Standard, official tool called 'alsatplg' is capable of compiling these >> into binary form which, after being transferred to /lib/firmware/ may be >> consumed by the driver during runtime. >> I have no problem with providing precompiled binaries to linux-firmware, >> if that's what community wants. >> >> Regards, >> Czarek >> >> > > I think the guild [1] is too complicated for normal users to fix the problem. > Given it's not only the internal microphone being affected, it's no sound > devices being created at all so no audio functions can work after kernel 5.8. > > Is there any potential problem to built-in the "<any> with hda dsp" precompiled > binary in linux-firmware? How do you distribute the SOF firmware? I'm going to include those binary topology files to the SOF firmware package for Fedora. Perhaps, you may follow this. Jaroslav > > Chris > >> [1]: https://gist.github.com/crojewsk/4e6382bfb0dbfaaf60513174211f29cb >> [2]: https://github.com/alsa-project/alsa-topology-conf/tree/master/topology -- Jaroslav Kysela <perex@xxxxxxxx> Linux Sound Maintainer; ALSA Project; Red Hat, Inc.
