linux-kernel - Re: sound/pci/hda/patch_hdmi.c:1086: undefined reference to `snd_hda_get_num

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Message-ID: <s5hr1z7q12m.wl-tiwai@suse.de>
Date:   Thu, 06 Feb 2020 14:48:01 +0100
From:   Takashi Iwai <tiwai@...e.de>
To:     Kai Vehmanen <kai.vehmanen@...ux.intel.com>
Cc:     kbuild test robot <lkp@...el.com>, Takashi Iwai <tiwai@...e.de>,
        kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Mark Brown <broonie@...nel.org>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Subject: Re: sound/pci/hda/patch_hdmi.c:1086: undefined reference to `snd_hda_get_num_devices'

On Thu, 06 Feb 2020 14:40:17 +0100,
Kai Vehmanen wrote:
> 
> Hey,
> 
> On Thu, 6 Feb 2020, kbuild test robot wrote:
> 
> >    ld: sound/pci/hda/patch_hdmi.o: in function `intel_not_share_assigned_cvt':
> > >> sound/pci/hda/patch_hdmi.c:1086: undefined reference to `snd_hda_get_num_devices'
> > >> ld: sound/pci/hda/patch_hdmi.c:1098: undefined reference to `snd_hda_get_dev_select'
> > >> ld: sound/pci/hda/patch_hdmi.c:1099: undefined reference to `snd_hda_set_dev_select'
> 
> hmm, this seems similar case as the previous one today w.r.t 
> hda_dsp_common.c:76. Patch_hdmi.c is built-in while snd-hda is a module. 
> Maybe we need to just drop the dependency from the ASoC board files to 
> SND_HDA_CODEC_HDMI. We don't have one for SND_HDA_CODEC either.

The problem is that SOF tries to do reverse-select the legacy HD-audio 
codec, but it doesn't work in general.  Or it must be done very
carefully.

If something gets selected, all dependencies have to be
reverse-selected, too.  But the legacy HDA is built up in a way of
standard top-down selection (i.e. SND_HDA_CODEC_* depends on SND_HDA,
not other way round).


Takashi