This is a note to let you know that I've just added the patch titled
ALSA: hda - Disable power_save_node for IDT 92HD73xx chips
to the 4.1-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_node-for-idt-92hd73xx-chips.patch
and it can be found in the queue-4.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From c7e1008048a97148d3aecae742f66fb2f944644c Mon Sep 17 00:00:00 2001
From: Takashi Iwai <[email protected]>
Date: Sun, 4 Oct 2015 22:44:12 +0200
Subject: ALSA: hda - Disable power_save_node for IDT 92HD73xx chips
From: Takashi Iwai <[email protected]>
commit c7e1008048a97148d3aecae742f66fb2f944644c upstream.
The recent widget power saving introduced some unavoidable click
noises on old IDT 92HD73xx chips while it still seems working on the
compatible new chips. In the bugzilla, we tried lots of tests and
workarounds, but they didn't help much. So, let's disable the feature
for these specific chips as the least (but safest) fix.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=104981
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
sound/pci/hda/patch_sigmatel.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -4522,7 +4522,11 @@ static int patch_stac92hd73xx(struct hda
return err;
spec = codec->spec;
- codec->power_save_node = 1;
+ /* enable power_save_node only for new 92HD89xx chips, as it causes
+ * click noises on old 92HD73xx chips.
+ */
+ if ((codec->core.vendor_id & 0xfffffff0) != 0x111d7670)
+ codec->power_save_node = 1;
spec->linear_tone_beep = 0;
spec->gen.mixer_nid = 0x1d;
spec->have_spdif_mux = 1;
Patches currently in stable-queue which might be from [email protected] are
queue-4.1/alsa-hda-disable-power_save_node-for-idt-92hd73xx-chips.patch
queue-4.1/x86-kexec-fix-kexec-crash-in-syscall-kexec_file_load.patch
queue-4.1/alsa-hda-disable-power_save_node-for-thinkpads.patch
queue-4.1/alsa-hda-add-dock-support-for-thinkpad-t550.patch
queue-4.1/alsa-hda-apply-spdif-pin-ctl-to-macbookpro-12-1.patch
queue-4.1/alsa-synth-fix-conflicting-oss-device-registration-on-awe32.patch
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