This is a note to let you know that I've just added the patch titled
ALSA: hda: Disable power-save on KONTRON SinglePC
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
alsa-hda-disable-power-save-on-kontron-singlepc.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a337c355719c42a6c5b67e985ad753590ed844fb Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@xxxxxxx>
Date: Thu, 30 Nov 2023 16:13:21 +0100
Subject: ALSA: hda: Disable power-save on KONTRON SinglePC
From: Takashi Iwai <tiwai@xxxxxxx>
commit a337c355719c42a6c5b67e985ad753590ed844fb upstream.
It's been reported that the runtime PM on KONTRON SinglePC (PCI SSID
1734:1232) caused a stall of playback after a bunch of invocations.
(FWIW, this looks like an timing issue, and the stall happens rather
on the controller side.)
As a workaround, disable the default power-save on this platform.
Cc: <stable@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20231130151321.9813-1-tiwai@xxxxxxx
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/pci/hda/hda_intel.c | 2 ++
1 file changed, 2 insertions(+)
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2371,6 +2371,8 @@ static struct snd_pci_quirk power_save_b
SND_PCI_QUIRK(0x17aa, 0x36a7, "Lenovo C50 All in one", 0),
/* https://bugs.launchpad.net/bugs/1821663 */
SND_PCI_QUIRK(0x1631, 0xe017, "Packard Bell NEC IMEDIA 5204", 0),
+ /* KONTRON SinglePC may cause a stall at runtime resume */
+ SND_PCI_QUIRK(0x1734, 0x1232, "KONTRON SinglePC", 0),
{}
};
#endif /* CONFIG_PM */
Patches currently in stable-queue which might be from tiwai@xxxxxxx are
queue-4.19/alsa-hda-disable-power-save-on-kontron-singlepc.patch
queue-4.19/alsa-hda-realtek-headset-mic-vref-to-100.patch
