linux-kernel - Re: snd_hda_intel/sst-acpi sound breakage on suspend/resume since 5.6-rc1

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Date:   Wed, 18 Mar 2020 11:05:21 +0100
From:   Cezary Rojewski <cezary.rojewski@...el.com>
To:     Dominik Brodowski <linux@...inikbrodowski.net>
Cc:     tiwai@...e.com, pierre-louis.bossart@...ux.intel.com,
        liam.r.girdwood@...ux.intel.com, yang.jie@...ux.intel.com,
        broonie@...nel.org, perex@...ex.cz, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: Re: snd_hda_intel/sst-acpi sound breakage on suspend/resume since
 5.6-rc1

On 2020-03-18 10:57, Dominik Brodowski wrote:
>>>
>>> Unfortunately, I cannot bisect this issue easily -- i915 was broken for
>>> quite some time on this system[*], prohibiting boot...
>>
>> Hmm, sounds like that issue is quite old. DSP for Haswell and Broadwell is
>> available for I2S devices only, so this relates directly to legacy HDA
>> driver. Compared to Skylake+, HDAudio controller for older platforms is
>> found within GPU. My advice is to notify the DRM guys about this issue.
>>
>> Takashi, are you aware of problems with HDMI on HSW/ BDW or should I just
>> loop Jani and other DRM peps here?
> 
> Well, it works on v5.5, so this issue is not really "quite old" (the "no
> context buffer need to restore!" message seen there seems harmless).
> 
> Thanks again, and best wishes,
> 	Dominik
> 

Was commenting the "i915 was broken for quite some time on this 
system[*], prohibiting boot...". Unless I misunderstood you, this ain't 
a DSP driver issue but HDAudio/iDisp one. Essentially, these are two 
issues you mentioned here.

Czarek