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

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Message-ID: <02d655fe-dd21-3fcb-6f5d-4ecde51f3240@linux.intel.com>
Date:   Thu, 6 Feb 2020 11:05:28 -0600
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Takashi Iwai <tiwai@...e.de>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>
Cc:     kbuild test robot <lkp@...el.com>, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Mark Brown <broonie@...nel.org>
Subject: Re: sound/pci/hda/patch_hdmi.c:1086: undefined reference to
 `snd_hda_get_num_devices'



On 2/6/20 7:48 AM, Takashi Iwai wrote:
> 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).

It's the same issue as the other one reported earlier, and adding the 
dependency on SOF_HDA makes the unmet dependency go away.