Re: [alsa-devel] snd_hda_codec_hdmi: `hdaudio hdaudioC0D2: Unable to bind the codec`

On Mon, 18 Feb 2019 16:17:30 +0100, Paul Menzel wrote:

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Then, I built the HDA subsystem as a module, but that also did not help. The DRM subsystem is started after the HD-audio subsystem.

$ grep -e SND_HDA= -e SND_HDA_INTEL /boot/config-4.20.8.mx64.245 
CONFIG_SND_HDA=m
CONFIG_SND_HDA_INTEL=m

That's odd. In sound/hda/hdac_i915.c there is an explicit request_module("i915"), and at that point, it has a 10 second timeout. If this isn't enough, try to raise the number, e.g. 60 seconds.

I tried as you suggested, and increased it to 60 seconds.

sed -i 's/msecs_to_jiffies(10 * 1000))/msecs_to_jiffies(60 * 1000))/' sound/hda/hdac_i915.c

That seems to have fixed it.

$ grep _hda_ 20190218–linux_4.20.10–dmesg.txt
[   15.568061] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[   15.706898] snd_hda_codec_realtek hdaudioC0D0: autoconfig for ALC671: line_outs=1 (0x21/0x0/0x0/0x0/0x0) type:line
[   15.708754] snd_hda_codec_realtek hdaudioC0D0:    speaker_outs=1 (0x17/0x0/0x0/0x0/0x0)
[   15.710249] snd_hda_codec_realtek hdaudioC0D0:    hp_outs=1 (0x14/0x0/0x0/0x0/0x0)
[   15.712031] snd_hda_codec_realtek hdaudioC0D0:    mono: mono_out=0x0
[   15.712348] snd_hda_codec_realtek hdaudioC0D0:    inputs:
[   15.712619] snd_hda_codec_realtek hdaudioC0D0:      Front Mic=0x19
[   15.712929] snd_hda_codec_realtek hdaudioC0D0:      Rear Mic=0x18
[   15.713234] snd_hda_codec_realtek hdaudioC0D0:      Line=0x1a

So the time-out, needs to be increased.

OK, I'm going to extend the value. I thought a minute would be too long, and I naively assumed that the recent machines were fast enough. Maybe 60 isn't too bad after all.

thanks,

Takashi