From 5e03e0db07043177b677b5890711568c586fcfc4 Mon Sep 17 00:00:00 2001
From: Manoj Gangwal <mgangwal@nvidia.com>
Date: Mon, 30 Apr 2012 21:06:45 +0530
Subject: asoc: tegra: pcm: Add support for setting bias level

Allow setting bias level to turn off clock extern1 when codec
is idle.

Bug 964287

Change-Id: I48056b86a9fdaea70202bee9326debaaddf69c0c
Signed-off-by: Manoj Gangwal <mgangwal@nvidia.com>
Reviewed-on: http://git-master/r/99665
Reviewed-by: Simone Willett <swillett@nvidia.com>
Tested-by: Simone Willett <swillett@nvidia.com>
---
 sound/soc/tegra/tegra_pcm.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

(limited to 'sound')

diff --git a/sound/soc/tegra/tegra_pcm.c b/sound/soc/tegra/tegra_pcm.c
index 89fd3ff8fb15..3b475a24c9a8 100644
--- a/sound/soc/tegra/tegra_pcm.c
+++ b/sound/soc/tegra/tegra_pcm.c
@@ -2,7 +2,7 @@
  * tegra_pcm.c - Tegra PCM driver
  *
  * Author: Stephen Warren <swarren@nvidia.com>
- * Copyright (C) 2010 - NVIDIA, Inc.
+ * Copyright (C) 2010-2012 - NVIDIA, Inc.
  *
  * Based on code copyright/by:
  *
@@ -29,6 +29,7 @@
  *
  */
 
+#include <asm/mach-types.h>
 #include <linux/module.h>
 #include <linux/dma-mapping.h>
 #include <linux/slab.h>
@@ -416,10 +417,19 @@ void tegra_pcm_free(struct snd_pcm *pcm)
 	tegra_pcm_deallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_PLAYBACK);
 }
 
+static int tegra_pcm_probe(struct snd_soc_platform *platform)
+{
+	if(machine_is_kai())
+		platform->dapm.idle_bias_off = 1;
+
+	return 0;
+}
+
 struct snd_soc_platform_driver tegra_pcm_platform = {
 	.ops		= &tegra_pcm_ops,
 	.pcm_new	= tegra_pcm_new,
 	.pcm_free	= tegra_pcm_free,
+	.probe		= tegra_pcm_probe,
 };
 
 static int __devinit tegra_pcm_platform_probe(struct platform_device *pdev)
-- 
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