linux-kernel - [PATCH 3.13 080/162] ALSA: ALC283 codec - Avoid pop noise on headphones during suspend/resume

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Date:	Thu,  6 Nov 2014 14:35:44 -0800
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Harsha Priya <harshapriya.n@...el.com>,
	Takashi Iwai <tiwai@...e.de>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13 080/162] ALSA: ALC283 codec - Avoid pop noise on headphones during suspend/resume

3.13.11.11 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Harsha Priya <harshapriya.n@...el.com>

commit b450b17c156e264bc44a198046d3ebaaef5a041d upstream.

This patch sets the headphones mode to default before suspending
which helps avoid the pop noise on headphones

Signed-off-by: Harsha Priya <harshapriya.n@...el.com>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 sound/pci/hda/patch_realtek.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index b2a5832..1a24b2c 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -2871,6 +2871,9 @@ static void alc283_shutup(struct hda_codec *codec)
 
 	alc_write_coef_idx(codec, 0x43, 0x9004);
 
+	/*depop hp during suspend*/
+	alc_write_coef_idx(codec, 0x06, 0x2100);
+
 	snd_hda_codec_write(codec, hp_pin, 0,
 			    AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_MUTE);
 
-- 
1.9.1

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