[PATCH] ALSA: hda/hdmi: Use only dynamic PCM device allocation

[Jaroslav Kysela]

On 25. 12. 22 19:52, Takashi Iwai wrote:
> On Sun, 25 Dec 2022 13:14:28 +0100,
> Michael Laß wrote:
>>
>> CC'ing amd-gfx as this might be an issue in the amd driver.
>>
>> This change causes a regression in Linux 6.1 at least on some AMD APUs.
>> There are reports from users with Ryzen 4750U, 5800U and 5850U chips
>> where the HDMI sound devices don't show up anymore. I'm affected by
>> this as well.
>>
>> Reverting this commit (ef6f5494) makes the HDMI audio devices show up
>> again. I verified that this is still an issue in current Linux git
>> (72a85e2b).
>>
>> Am Donnerstag, dem 22.09.2022 um 10:40 +0200 schrieb Jaroslav Kysela:
>>>> Per discussion on the alsa-devel mailing list [1], the legacy PIN to PCM
>>>> device mapping is obsolete nowadays. The maximum number of the simultaneously
>>>> usable PCM devices is equal to the HDMI codec converters.
>>>>
>>>> Remove the extra PCM devices (beyond the detected converters) and force
>>>> the use of the dynamic PCM device allocation. The legacy code is removed.
>>>>
>>>> I believe that all HDMI codecs have the jack sensing feature. Move the check
>>>> to the codec probe function and print a warning, if a codec without this
>>>> feature is detected.
>>
>> The corresponding message ("jack not detectable") is not shown on the
>> affected system.
>>
>>>> [1] https://lore.kernel.org/alsa-devel/2f37e0b2-1e82-8c0b-2bbd-1e5038d6ecc6@perex.cz/
>>
>> Links to some reports of this issue:
>> https://bugzilla.kernel.org/show_bug.cgi?id=216836
>> https://bbs.archlinux.org/viewtopic.php?pid=2075700
>> https://bugs.archlinux.org/task/76917
>> https://www.reddit.com/r/archlinux/comments/zsqq7i/hdmi_audio_is_broken_after_updating_kernel_to_611
> 
> Could you give alsa-info.sh outputs from both working and non-working
> cases?  Run the script with --no-upload option during the playback of
> HDMI stream, and attach the outputs.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=216836

				Jaroslav

-- 
Jaroslav Kysela <perex at perex.cz>
Linux Sound Maintainer; ALSA Project; Red Hat, Inc.