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SubjectRe: snd_hda_codec_hdmi: `hdaudio hdaudioC0D2: Unable to bind the codec`
On Wed, 19 Sep 2018 13:14:43 +0200,
Paul Menzel wrote:
>
> Dear Takashi,
>
> On 09/18/18 23:00, Takashi Iwai wrote:
> > On Tue, 18 Sep 2018 17:55:15 +0200, Paul Menzel wrote:
>
> >> With drm-tip (v4.19-rc3-946-g09b295662edd) Linux prints
> >> `snd_hda_codec_hdmi hdaudioC0D2: No i915 binding for Intel HDMI/DP codec`
> >> to the log.
> >>
> >> ```
> >> […]
> >> [ 12.481788] snd_hda_codec_realtek hdaudioC0D0: autoconfig for ALC671: line_outs=1 (0x21/0x0/0x0/0x0/0x0) type:line
> >> [ 12.482536] snd_hda_codec_realtek hdaudioC0D0: speaker_outs=1 (0x17/0x0/0x0/0x0/0x0)
> >> [ 12.483184] snd_hda_codec_realtek hdaudioC0D0: hp_outs=1 (0x14/0x0/0x0/0x0/0x0)
> >> [ 12.483737] snd_hda_codec_realtek hdaudioC0D0: mono: mono_out=0x0
> >> [ 12.484198] snd_hda_codec_realtek hdaudioC0D0: inputs:
> >> [ 12.484582] snd_hda_codec_realtek hdaudioC0D0: Front Mic=0x19
> >> [ 12.485100] snd_hda_codec_realtek hdaudioC0D0: Rear Mic=0x18
> >> [ 12.485519] snd_hda_codec_realtek hdaudioC0D0: Line=0x1a
> >> [ 12.497685] snd_hda_codec_hdmi hdaudioC0D2: No i915 binding for Intel HDMI/DP codec
> >> [ 12.498311] hdaudio hdaudioC0D2: Unable to bind the codec
> >> [ 12.498789] input: HDA Intel PCH Front Mic as /devices/pci0000:00/0000:00:1f.3/sound/card0/input6
> >> [ 12.499567] input: HDA Intel PCH Rear Mic as /devices/pci0000:00/0000:00:1f.3/sound/card0/input7
> >> [ 12.500268] input: HDA Intel PCH Line as /devices/pci0000:00/0000:00:1f.3/sound/card0/input8
> >> [ 12.501039] input: HDA Intel PCH Line Out as /devices/pci0000:00/0000:00:1f.3/sound/card0/input9
> >> [ 12.501683] input: HDA Intel PCH Front Headphone as /devices/pci0000:00/0000:00:1f.3/sound/card0/input10
> >> [ 17.743338] [drm:intel_pch_type [i915]] Found SunrisePoint PCH
> >> […]
> >> ```
> >>
> >> Is that an error or just a notice?
> >
> > This must be a side-effect of the recent change in i915 to be async
> > probe. This made me checking the corresponding ALSA audio binding
> > code change, and actually found a bug.
> >
> > Could you try the fix below?
>
> Thank you for your quick reply. Of course, and can try it.
>
> > -- 8< --
> > From: Takashi Iwai <tiwai@suse.de>
> > Subject: [PATCH] ALSA: hda: Fix the audio-component completion timeout
> >
> > The timeout of audio component binding was incorrectly specified in
> > msec, not in jiffies, which results in way too shorter timeout than
> > expected.
> >
> > Along with fixing it, add the information print about the binding
> > failure to show the unexpected situation more clearly.
> >
> > Fixes: a57942bfdd61 ("ALSA: hda: Make audio component support more generic")
> > Signed-off-by: Takashi Iwai <tiwai@suse.de>
> > ---
> > sound/hda/hdac_i915.c | 4 +++-
> > 1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/sound/hda/hdac_i915.c b/sound/hda/hdac_i915.c
> > index b5282cbbe489..617ff1aa818f 100644
> > --- a/sound/hda/hdac_i915.c
> > +++ b/sound/hda/hdac_i915.c
> > @@ -145,9 +145,11 @@ int snd_hdac_i915_init(struct hdac_bus *bus)
> > if (!acomp->ops) {
> > request_module("i915");
> > /* 10s timeout */
> > - wait_for_completion_timeout(&bind_complete, 10 * 1000);
> > + wait_for_completion_timeout(&bind_complete,
> > + msecs_to_jiffies(10 * 1000));
> > }
> > if (!acomp->ops) {
> > + dev_info(bus->dev, "couldn't bind with audio component\n");
> > snd_hdac_acomp_exit(bus);
> > return -ENODEV;
> > }
>
> Unfortunately, it doesn’t seem to help.
>
> ```
> [ 12.471105] snd_hda_intel 0000:00:1f.3: couldn't bind with audio component

So it has waited for 10 seconds and timed out. You can check the
calls via init_debug option or such to verify it.

> [ 12.483298] snd_hda_codec_realtek hdaudioC0D0: autoconfig for ALC671: line_outs=1 (0x21/0x0/0x0/0x0/0x0) type:line
> [ 12.484068] snd_hda_codec_realtek hdaudioC0D0: speaker_outs=1 (0x17/0x0/0x0/0x0/0x0)
> [ 12.484643] snd_hda_codec_realtek hdaudioC0D0: hp_outs=1 (0x14/0x0/0x0/0x0/0x0)
> [ 12.485268] snd_hda_codec_realtek hdaudioC0D0: mono: mono_out=0x0
> [ 12.485700] snd_hda_codec_realtek hdaudioC0D0: inputs:
> [ 12.486135] snd_hda_codec_realtek hdaudioC0D0: Front Mic=0x19
> [ 12.486558] snd_hda_codec_realtek hdaudioC0D0: Rear Mic=0x18
> [ 12.487051] snd_hda_codec_realtek hdaudioC0D0: Line=0x1a
> [ 12.498994] snd_hda_codec_hdmi hdaudioC0D2: No i915 binding for Intel HDMI/DP codec
> [ 12.499707] hdaudio hdaudioC0D2: Unable to bind the codec
> [ 12.500294] input: HDA Intel PCH Front Mic as /devices/pci0000:00/0000:00:1f.3/sound/card0/input6
> [ 12.501194] input: HDA Intel PCH Rear Mic as /devices/pci0000:00/0000:00:1f.3/sound/card0/input7
> [ 12.502084] input: HDA Intel PCH Line as /devices/pci0000:00/0000:00:1f.3/sound/card0/input8
> [ 12.502800] input: HDA Intel PCH Line Out as /devices/pci0000:00/0000:00:1f.3/sound/card0/input9
> [ 12.503525] input: HDA Intel PCH Front Headphone as /devices/pci0000:00/0000:00:1f.3/sound/card0/input10
> [ 17.734286] [drm:intel_pch_type [i915]] Found SunrisePoint PCH
> [ 17.734300] [drm:i915_driver_load [i915]] WOPCM size: 1024KiB

Why the i915 driver gets initialized *so late*?


BTW, could you strip the mail to more lightweight? We don't need so
much things, just the relevant kernel messages should suffice.


thanks,

Takashi

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