Messages in this thread | | | Subject | Re: No sound cards detected on Kabylake laptops after upgrade to kernel 5.8 | From | Amadeusz Sławiński <> | Date | Thu, 11 Mar 2021 11:40:50 +0100 |
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On 3/11/2021 11:24 AM, Jaroslav Kysela wrote: > Dne 11. 03. 21 v 6:50 Chris Chiu napsal(a): >> On Tue, Mar 9, 2021 at 11:29 PM Cezary Rojewski >> <cezary.rojewski@intel.com> 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. >
Wouldn't it make more sense to distribute binaries along with confs from which they are build, which are already installed by alsa-topology package? Similarly Ubuntu could use alsa-topology-conf package...
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