Message-ID: <682dfcc5-056c-4170-910b-64ae42370c52@collabora.com>
Date: Tue, 9 Apr 2024 12:55:00 +0300
From: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
To: Linux regressions mailing list <regressions@...ts.linux.dev>,
 Bagas Sanjaya <bagasdotme@...il.com>,
 Venkata Prasad Potturu <venkataprasad.potturu@....com>
Cc: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
 Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
 Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
 Arun Gopal Kondaveeti <arungopal.kondaveeti@....com>,
 Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
 Daniel <dmanlfc@...il.com>,
 Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
 Linux Sound System <linux-sound@...r.kernel.org>
Subject: Re: Fwd: Steam Deck OLED 6.8.2 nau8821-max fails

On 4/9/24 12:19 PM, Linux regression tracking (Thorsten Leemhuis) wrote:
> On 09.04.24 10:47, Cristian Ciocaltea wrote:
>> On 4/9/24 11:04 AM, Linux regression tracking (Thorsten Leemhuis) wrote:
>>> On 09.04.24 09:42, Cristian Ciocaltea wrote:
>>>> On 4/9/24 7:44 AM, Linux regression tracking (Thorsten Leemhuis) wrote:
>>>>> On 09.04.24 01:44, Cristian Ciocaltea wrote:
>>>>>> On 4/7/24 10:47 AM, Linux regression tracking (Thorsten Leemhuis) wrote:
>>>>>>> On 06.04.24 15:08, Bagas Sanjaya wrote:
>>>>>>>> On Bugzilla, Daniel <dmanlfc@...il.com> reported topology regression
>>>>>>>> on Steam Deck OLED [1]. He wrote:
>>>>>>
>>>>>>>>> I'm adding this here, I hope it's the correct place.
>>>>>>>>> Currently the Steam Deck OLED fails with Kernel 6.8.2 when trying to initialise the topology for the device.
>>>>>>>>> I'm using the `sof-vangogh-nau8821-max.tplg` file from the Steam Deck OLED and associated firmware.
>>>>>>>> [1]: https://bugzilla.kernel.org/show_bug.cgi?id=218677
>>>>>>> A quick search made me find these posts/threads that foreshadow the problem:
>>>>>>>
>>>>>>> https://lore.kernel.org/lkml/20231219030728.2431640-1-cristian.ciocaltea@collabora.com/
>>>>>>> https://lore.kernel.org/all/a3357e1f-f354-4d4b-9751-6b2182dceea6@amd.com/
>>>>>>>
>>>>>>> From a quick look at the second discussion it seems a bit like we are
>>>>>>> screwed, as iiutc topology files are out in the wild for one or the
>>>>>>> other approach. So we might have to bite a bullet there and accept the
>>>>>>> regression -- but I might easily be totally mistaken here. Would be good
>>>>>>> in one of the experts (Venkata Prasad Potturu maybe?) could quickly
>>>>>>> explain what's up here.
>>>>>>
>>>>>> The problem here is that Steam Deck OLED provides a topology file which
>>>>>> uses an incorrect DAI link ID for BT codec. 
>>>>>>
>>>>>> Patch [1] moves BT_BE_ID to position 2 in the enum, as expected by the
>>>>>> topology, but this is not a change that can be accepted upstream as it
>>>>>> would break other devices which rely on BT_BE_ID set to 3.  
>>>>>>
>>>>>> The proper solution would be to update the topology file on Steam Deck,
>>>>>> but this is probably not straightforward to be accomplished as it would
>>>>>> break the compatibility with the currently released (downstream)
>>>>>> kernels.
>>>>>>
>>>>>> Hopefully, this sheds some more light on the matter.
>>>>>>
>>>>>> [1]: https://lore.kernel.org/all/20231209205351.880797-11-cristian.ciocaltea@collabora.com/
>>>>>
>>>>> Many thx, yes, this sheds some light on the matter. But there is one
>>>>> remaining question: can we make both camps happy somehow? E.g. something
>>>>> along the lines of "first detect if the topology file has BT_BE_ID in
>>>>> position 2 or 3 and then act accordingly?
>>>>
>>>> Right, I have this on my TODOs list but haven't managed to dig into it
>>>> yet. However, that would be most likely just another hack to be carried
>>>> on until the transition to a fixed topology is completed.
>>>
>>> Well, sure it's a hack, but the thing is, our number one rule is "no
>>> regressions" and the reporter apparently faces one (see start of the
>>> thread). So to fulfill this rule it would be ideal to have a fix
>>> available soonish or revert the culprit and reply it later together with
>>> the fix.
>>
>> Hmm, unless I'm missing something, this shouldn't been considered a
>> regression.  As I explained previously, the OLED model was launched with
>>  a downstream implementation of the Vangogh SOF drivers on top of v6.1,
>> as there was no upstream support back then.
>>
>> When AMD eventually completed the upstreaming process of their SOF
>> drivers in v6.6, we ended up with this unfortunate ID assignments
>> incompatibility.  Hence I cannot see how the mainline kernel would have
>> worked without applying patch [1] above, unless the reporter
>> experimented with a different topology (which is not the case if I got
>> this right).
>>
>>> Do we know which change that went into 6.8 caused this? Or is a revert
>>> out-of-the question as it will likely break things for other users that
>>> already upgraded to 6.8 and have a matching topology file? (/me fears
>>> the answer to the latter question is "yes", but I have to ask :-/)
>>
>> We need to understand how the reporter got this working with mainline
>> kernels without applying any out-of-tree patches.
> 
> Ahh, okay, thx, now I understand this better. You are most likely
> correct. It also made me look at the initial report again where I
> noticed "When *I manually patched support* for the 6.6 or 6.7 mainline
> kernel it worked fine.", so yes, this likely is not a regression.

It would be interesting to find out what the *manually patched support*
involved. FWIW, to get audio working with v6.8, it's also necessary to
backport several patches from v6.9-rc1 - I would consider the following:

Fixes: f0f1021fc9cb ("ASoC: amd: acp: Drop redundant initialization of machine driver data")
Fixes: 68ab29426d88 ("ASoC: amd: acp: Make use of existing *_CODEC_DAI macros")
Fixes: d0ada20279db ("ASoC: amd: acp: Add missing error handling in sof-mach")
Fixes: 222be59e5eed ("ASoC: SOF: amd: Fix memory leak in amd_sof_acp_probe()")
Fixes: a13f0c3c0e8f ("ASoC: SOF: amd: Optimize quirk for Valve Galileo")
Fixes: 369b997a1371 ("ASoC: SOF: core: Skip firmware test for custom loaders")
Fixes: d9cacc1a2af2 ("ASoC: SOF: amd: Compute file paths on firmware load")
Fixes: 33c3d8133307 ("ASoC: SOF: amd: Move signed_fw_image to struct acp_quirk_entry")
Fixes: 094d11768f74 ("ASoC: SOF: amd: Skip IRAM/DRAM size modification for Steam Deck OLED")

I think most if not all of the mandatory fixes from the list above have been
already included in the latest v6.8 stable updates, but I haven't actually
tested.

> 
> Thx for your help and sorry for the trouble I caused!

No problem at all!

Regards,
Cristian

Powered by blists - more mailing lists