linux-kernel - [ 35/79] ALSA: hda/via - Fix wrongly cleared pins after suspend on VT1802

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Message-Id: <20130611195317.037014412@linuxfoundation.org>
Date:	Tue, 11 Jun 2013 13:03:01 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Alex Riesen <raa.lkml@...il.com>,
	Takashi Iwai <tiwai@...e.de>
Subject: [ 35/79] ALSA: hda/via - Fix wrongly cleared pins after suspend on VT1802

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

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

From: Takashi Iwai <tiwai@...e.de>

commit 5a6f294e87974e6ec68d7113553ffd975d83bf15 upstream.

VIA driver has a special suspend handling only for VT1802 to reduce
the pop noise.  During the transition to the generic parser, the
behavior of snd_hda_set_pin_ctl() was also changed to modify the
cached values, too.  And this caused a regression where the pin is
still cleared even after the resume (including the resume from power
save), resulting in the silent output.

The fix is simply to replace snd_hda_set_pin_ctl() with the explicit
call of snd_hda_codec_write() again.

Reported-by: Alex Riesen <raa.lkml@...il.com>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 sound/pci/hda/patch_via.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/sound/pci/hda/patch_via.c
+++ b/sound/pci/hda/patch_via.c
@@ -483,7 +483,9 @@ static int via_suspend(struct hda_codec
 		/* Fix pop noise on headphones */
 		int i;
 		for (i = 0; i < spec->gen.autocfg.hp_outs; i++)
-			snd_hda_set_pin_ctl(codec, spec->gen.autocfg.hp_pins[i], 0);
+			snd_hda_codec_write(codec, spec->gen.autocfg.hp_pins[i],
+					    0, AC_VERB_SET_PIN_WIDGET_CONTROL,
+					    0x00);
 	}
 
 	return 0;


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