linux-kernel - [PATCH 3.2 195/200] ALSA: oxygen: Xonar DG(X): modify DAC routing

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Message-ID: <lsq.1396221815.14156929@decadent.org.uk>
Date:	Mon, 31 Mar 2014 00:23:35 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "Roman Volkov" <v1ron@...l.ru>,
	"Clemens Ladisch" <clemens@...isch.de>
Subject: [PATCH 3.2 195/200] ALSA: oxygen: Xonar DG(X): modify DAC routing

3.2.56-rc1 review patch.  If anyone has any objections, please let me know.

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

From: Clemens Ladisch <clemens@...isch.de>

commit 1f91ecc14deea9461aca93273d78871ec4d98fcd upstream.

When selecting the audio output destinations (headphones, FP headphones,
multichannel output), unnecessary I2S channels are digitally muted to
avoid invalid signal levels on the other outputs.

Signed-off-by: Roman Volkov <v1ron@...l.ru>
Signed-off-by: Clemens Ladisch <clemens@...isch.de>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 sound/pci/oxygen/xonar_dg.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

--- a/sound/pci/oxygen/xonar_dg.c
+++ b/sound/pci/oxygen/xonar_dg.c
@@ -294,6 +294,16 @@ static int output_switch_put(struct snd_
 		oxygen_write16_masked(chip, OXYGEN_GPIO_DATA,
 				      data->output_sel == 1 ? GPIO_HP_REAR : 0,
 				      GPIO_HP_REAR);
+		oxygen_write8_masked(chip, OXYGEN_PLAY_ROUTING,
+				     data->output_sel == 0 ?
+				     OXYGEN_PLAY_MUTE01 :
+				     OXYGEN_PLAY_MUTE23 |
+				     OXYGEN_PLAY_MUTE45 |
+				     OXYGEN_PLAY_MUTE67,
+				     OXYGEN_PLAY_MUTE01 |
+				     OXYGEN_PLAY_MUTE23 |
+				     OXYGEN_PLAY_MUTE45 |
+				     OXYGEN_PLAY_MUTE67);
 	}
 	mutex_unlock(&chip->mutex);
 	return changed;

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