File sound-disable-16bit-MMUL.patch of Package kernel-adaptation-archos-gen9

From: Sebastien Guiriec <s-guiriec@ti.com>
Date: Tue, 24 Jan 2012 14:43:24 +0000 (+0100)
Subject: ASoC: ABE: disable 16bits support on MM_UL path
X-Git-Tag: ti-ubuntu-3.1-1282.10~1
X-Git-Url: http://dev.omapzoom.org/?p=integration%2Fkernel-ubuntu.git;a=commitdiff_plain;h=8b5836d9539d23c4876a68e155a967a0b8a98c7e

ASoC: ABE: disable 16bits support on MM_UL path

16 bits support is broken on MM_UL path, resulting in
a noisy channel on stereo record.

This work-around disables 16bits support (32bits remains).

If required, the format conversion shall be handled by SW layers (alsa).

Another alternative is to use MM_UL2 path (that properly supports 16bits).
Example how to setup and test MM_UL2:
 amixer cset name='MUX_UL10' 11
 amixer cset name='MUX_UL11' 12
 arecord -v -D plughw:0,1 -d 5 -f S16_LE -c 2 -r 48000 record.wav

Signed-off-by: Sebastien Jan <s-jan@ti.com>
---

diff --git a/sound/soc/omap/omap-abe.c b/sound/soc/omap/omap-abe.c
index 0f32f05..a30d278 100644
--- a/sound/soc/omap/omap-abe.c
+++ b/sound/soc/omap/omap-abe.c
@@ -1458,7 +1458,7 @@ static struct snd_soc_dai_driver omap_abe_dai[] = {
 			.channels_min = 2,
 			.channels_max = 8,
 			.rates = SNDRV_PCM_RATE_48000,
-			.formats = OMAP_ABE_FORMATS,
+			.formats = SNDRV_PCM_FMTBIT_S32_LE,
 		},
 		.ops = &omap_abe_dai_ops,
 		.widgets = mm1_widgets,