ASoC: DaVinci: i2s, reduce underruns by combining into 1 element

Allow the left and right 16 bit samples to be shifted out as 1
32 bit sample.

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/include/mach/asp.h b/arch/arm/mach-davinci/include/mach/asp.h
index 18e4ce34ece6..019c64733417 100644
--- a/arch/arm/mach-davinci/include/mach/asp.h
+++ b/arch/arm/mach-davinci/include/mach/asp.h
@@ -51,6 +51,12 @@ struct snd_platform_data {
         u32 rx_dma_offset;
         enum dma_event_q eventq_no;     /* event queue number */
         unsigned int codec_fmt;
+        /*
+         * Allowing this is more efficient and eliminates left and right swaps
+         * caused by underruns, but will swap the left and right channels
+         * when compared to previous behavior.
+         */
+        unsigned enable_channel_combine:1;
 
         /* McASP specific fields */
         int tdm_slots;