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

[Takashi Iwai]

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 device mapping is obsolete nowadays.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.


thanks,

Takashi