ALSA: hda: Modify stream stripe mask only when needed
authorTakashi Iwai <tiwai@suse.de>
Mon, 2 Dec 2019 07:49:47 +0000 (08:49 +0100)
committerTakashi Iwai <tiwai@suse.de>
Tue, 3 Dec 2019 06:46:30 +0000 (07:46 +0100)
commite38e486d66e2a3b902768fd71c32dbf10f77e1cb
tree6ae80036fac060db3a79149f51e6663450130dd2
parentd2cd795c4ece1a24fda170c35eeb4f17d9826cbb
ALSA: hda: Modify stream stripe mask only when needed

The recent commit in HD-audio stream management for changing the
stripe control seems causing a regression on some platforms.  The
stripe control is currently used only by HDMI codec, and applying the
stripe mask unconditionally may lead to scratchy and static noises as
seen on some MacBooks.

For addressing the regression, this patch changes the stream
management code to apply the stripe mask conditionally only when the
codec driver requested.

Fixes: 9b6f7e7a296e ("ALSA: hda: program stripe bits for controller")
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=204477
Tested-by: Michael Pobega <mpobega@neverware.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20191202074947.1617-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
include/sound/hdaudio.h
sound/hda/hdac_stream.c
sound/pci/hda/patch_hdmi.c