This is a note to let you know that I've just added the patch titled

ALSA: hda - Reduce the suspend time consumption for ALC256

to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: alsa-hda-reduce-the-suspend-time-consumption-for-alc256.patch and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From 1c9609e3a8cf5997bd35205cfda1ff2218ee793b Mon Sep 17 00:00:00 2001

From: Takashi Iwai tiwai@suse.de Date: Fri, 19 Jan 2018 14:18:34 +0100 Subject: ALSA: hda - Reduce the suspend time consumption for ALC256

From: Takashi Iwai tiwai@suse.de

commit 1c9609e3a8cf5997bd35205cfda1ff2218ee793b upstream.

ALC256 has its own quirk to override the shutup call, and it contains the COEF update for pulling down the headset jack control. Currently, the COEF update is called after clearing the headphone pin, and this seems triggering a stall of the codec communication, and results in a long delay over a second at suspend.

A quick resolution is to swap the calls: at first with the COEF update, then clear the headphone pin.

Fixes: 4a219ef8f370 ("ALSA: hda/realtek - Add ALC256 HP depop function") Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=198503 Reported-by: Paul Menzel pmenzel@molgen.mpg.de Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- sound/pci/hda/patch_realtek.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -3154,11 +3154,13 @@ static void alc256_shutup(struct hda_cod if (hp_pin_sense) msleep(85);

+ /* 3k pull low control for Headset jack. */ + /* NOTE: call this before clearing the pin, otherwise codec stalls */ + alc_update_coef_idx(codec, 0x46, 0, 3 << 12); + snd_hda_codec_write(codec, hp_pin, 0, AC_VERB_SET_PIN_WIDGET_CONTROL, 0x0);

- alc_update_coef_idx(codec, 0x46, 0, 3 << 12); /* 3k pull low control for Headset jack. */ - if (hp_pin_sense) msleep(100);

Patches currently in stable-queue which might be from tiwai@suse.de are

queue-4.15/alsa-hda-reduce-the-suspend-time-consumption-for-alc256.patch