This is a note to let you know that I've just added the patch titled
ALSA: hda: Drop the BATCH workaround for AMD controllers
to the 4.14-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-drop-the-batch-workaround-for-amd-controllers.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 28e96c1693ec1cdc963807611f8b5ad400431e82 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@xxxxxxx>
Date: Mon, 8 Mar 2021 17:07:26 +0100
Subject: ALSA: hda: Drop the BATCH workaround for AMD controllers
From: Takashi Iwai <tiwai@xxxxxxx>
commit 28e96c1693ec1cdc963807611f8b5ad400431e82 upstream.
The commit c02f77d32d2c ("ALSA: hda - Workaround for crackled sound on
AMD controller (1022:1457)") introduced a few workarounds for the
recent AMD HD-audio controller, and one of them is the forced BATCH
PCM mode so that PulseAudio avoids the timer-based scheduling. This
was thought to cover for some badly working applications, but this
actually worsens for more others. In total, this wasn't a good idea
to enforce it.
This is a partial revert of the commit above for dropping the PCM
BATCH enforcement part to recover from the regression again.
Fixes: c02f77d32d2c ("ALSA: hda - Workaround for crackled sound on AMD controller (1022:1457)")
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=195303
Cc: <stable@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210308160726.22930-1-tiwai@xxxxxxx
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/pci/hda/hda_controller.c | 7 -------
1 file changed, 7 deletions(-)
--- a/sound/pci/hda/hda_controller.c
+++ b/sound/pci/hda/hda_controller.c
@@ -624,13 +624,6 @@ static int azx_pcm_open(struct snd_pcm_s
20,
178000000);
- /* by some reason, the playback stream stalls on PulseAudio with
- * tsched=1 when a capture stream triggers. Until we figure out the
- * real cause, disable tsched mode by telling the PCM info flag.
- */
- if (chip->driver_caps & AZX_DCAPS_AMD_WORKAROUND)
- runtime->hw.info |= SNDRV_PCM_INFO_BATCH;
-
if (chip->align_buffer_size)
/* constrain buffer sizes to be multiple of 128
bytes. This is more efficient in terms of memory
Patches currently in stable-queue which might be from tiwai@xxxxxxx are
queue-4.14/alsa-hda-avoid-spurious-unsol-event-handling-during-s3-s4.patch
queue-4.14/alsa-hda-drop-the-batch-workaround-for-amd-controllers.patch
queue-4.14/alsa-usb-audio-fix-cannot-get-freq-eq-errors-on-dell-ae515-sound-bar.patch
queue-4.14/alsa-hda-hdmi-cancel-pending-works-before-suspend.patch
