[alsa-devel] [PATCH v2 10/10] ASoC: mrst_machine: add initial config to machine driver

[Lu Guanqun]

On Moorestown, DMIC's output is set to PCM2 mono.
And the Moorestown uses MIC2 pseudo-differential configuration.

Signed-off-by: Lu Guanqun <guanqun.lu at intel.com>
---
 sound/soc/mid-x86/mrst_machine.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/sound/soc/mid-x86/mrst_machine.c b/sound/soc/mid-x86/mrst_machine.c
index eb52a2b..806d18c 100644
--- a/sound/soc/mid-x86/mrst_machine.c
+++ b/sound/soc/mid-x86/mrst_machine.c
@@ -91,6 +91,12 @@ static int mrst_audio_init(struct snd_soc_pcm_runtime *runtime)
 	struct snd_soc_dapm_context *dapm = &codec->dapm;
 	int ret;
 
+	/* DMIC configuration: mono output to PCM2 */
+	snd_soc_update_bits(codec, UPD9976_MICCTRL, BIT(1)|BIT(0), 0x1);
+
+	/* Set MIC2 to pseudo-differential */
+	snd_soc_update_bits(codec, UPD9976_MICSELVOL, BIT(4), BIT(4));
+
 	snd_soc_dapm_nc_pin(dapm, "LINEINL");
 	snd_soc_dapm_nc_pin(dapm, "LINEINR");
 	snd_soc_dapm_nc_pin(dapm, "LINEOUTL");