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Date:   Mon, 04 Nov 2019 16:08:26 +0100
Message-ID: <s5h4kzjwufp.wl-tiwai@suse.de>
From:   Takashi Iwai <tiwai@suse.de>
To:     Mika Westerberg <mika.westerberg@linux.intel.com>
Cc:     Takashi Iwai <tiwai@suse.de>, Paul Menzel <pmenzel@molgen.mpg.de>,
        Andreas Noever <andreas.noever@gmail.com>,
        Michael Jamet <michael.jamet@intel.com>,
        Yehezkel Bernat <YehezkelShB@gmail.com>,
        Christian Kellner <ck@xatom.net>,
        intel-gfx@lists.freedesktop.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Mario Limonciello <mario.limonciello@dell.com>
Subject: Re: snd_hda_intel 0000:00:1f.3: No response from codec, resetting bus: last cmd=
In-Reply-To: <20191104145825.GE2552@lahna.fi.intel.com>
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        <20191104131024.GB2552@lahna.fi.intel.com>
        <s5heeynwzhi.wl-tiwai@suse.de>
        <20191104145825.GE2552@lahna.fi.intel.com>
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On Mon, 04 Nov 2019 15:58:25 +0100,
Mika Westerberg wrote:
> 
> 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@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).

Well, here HDMI codec I meant is for both HDMI and DP.  Its audio
device is common for both display types.


thanks,

Takashi