[Intel-gfx] snd_hda_intel 0000:00:1f.3: No response from codec, resetting bus: last cmd=

[Mika Westerberg]

On Mon, Nov 04, 2019 at 02:19:21PM +0100, Takashi Iwai wrote:
> On Mon, 04 Nov 2019 14:10:24 +0100,
> Mika Westerberg wrote:
> > 
> > Hi,
> > 
> > On Mon, Nov 04, 2019 at 01:57:54PM +0100, Paul Menzel wrote:
> > > Dear Linux folks,
> > > 
> > > 
> > > On the Dell XPS 13 9380 with Debian Sid/unstable with Linux 5.3.7
> > > resuming0with Dell’s Thunderbolt TB16 dock connected, Linux spews
> > > the errors below.
> > 
> > I have this machine here so can try to reproduce it as well.
> > 
> > > ```
> > > [    0.000000] Linux version 5.3.0-1-amd64 (debian-kernel at lists.debian.org) (gcc version 9.2.1 20191008 (Debian 9.2.1-9)) #1 SMP Debian 5.3.7-1 (2019-10-19)
> > > […]
> > > [    1.596619] pci 0000:00:1f.3: Adding to iommu group 12
> > > [   14.536274] snd_hda_intel 0000:00:1f.3: enabling device (0000 -> 0002)
> > > [   14.544100] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
> > > [   14.760751] input: HDA Intel PCH Headphone Mic as /devices/pci0000:00/0000:00:1f.3/sound/card0/input16
> > > [   14.760790] input: HDA Intel PCH HDMI as /devices/pci0000:00/0000:00:1f.3/sound/card0/input17
> > > [  156.614284] snd_hda_intel 0000:00:1f.3: No response from codec, disabling MSI: last cmd=0x20270503
> > > [  157.622232] snd_hda_intel 0000:00:1f.3: No response from codec, resetting bus: last cmd=0x20270503
> > > [  158.626371] snd_hda_intel 0000:00:1f.3: No response from codec, resetting bus: last cmd=0x20370503
> > > [  159.634102] snd_hda_intel 0000:00:1f.3: No response from codec, resetting bus: last cmd=0x201f0500
> > > [  161.678121] snd_hda_intel 0000:00:1f.3: No response from codec, resetting bus: last cmd=0x20270503
> > > [  162.682272] snd_hda_intel 0000:00:1f.3: No response from codec, resetting bus: last cmd=0x20370503
> > > [  163.694234] snd_hda_intel 0000:00:1f.3: No response from codec, resetting bus: last cmd=0x201f0500
> > > [  165.730142] snd_hda_intel 0000:00:1f.3: No response from codec, resetting bus: last cmd=0x20270503
> > > […]
> > > ```
> > > 
> > > In the bug report *[Intel Ice Lake, snd-hda-intel, HDMI] "No
> > > response from codec" (after display hotplug?)* [1], note it’s a
> > > different model, Takashi comments that this is a Thunderbolt or
> > > i915 issue.
> > 
> > 0000:00:1f.3 is on PCH so not sure how it could be related to
> > Thunderbolt, well or i915 for that matter.
> 
> It's the HD-audio controller PCI device and both HDMI and onboard
> codecs are on that bus.  HDMI codec a shadow device of GPU, so it has
> a strong dependency on i915 GPU driver.  The power of HD-audio bus and
> codec is controlled over DRM audio component ops, so the power-on must
> have been notified to GPU side, but still something seems missing.
> ANd, with the dock, the other parties come to play into the game, so
> it becomes more complex...

OK, thanks for explaining. Then I guess i915 may be related. However,
that traffic for sure does not go over Thunderbolt fabric (PCIe and DP
does).