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authorXiubo Li <Li.Xiubo@freescale.com>2014-02-14 09:34:35 +0800
committerMark Brown <broonie@linaro.org>2014-02-23 14:15:30 +0900
commit89c6785715592a6b082b3f9f28c27bb14b041c7d (patch)
treeab90c2ee8e4e2c482a945692374d76cecc092966 /include/sound/soc-dai.h
parent72899ad8a46a80ad5fc725afea443f94945ae370 (diff)
downloadlinux-89c6785715592a6b082b3f9f28c27bb14b041c7d.tar.bz2
ASoC: core: add TDM slot parsing from DT supports
For some CPU/CODEC DAI devices the TDM slot infomation maybe needed. This patch adds the slot parsing from DT supports. TDM slot properties: dai-tdm-slot-num : Number of slots in use. dai-tdm-slot-width : Width in bits for each slot. For instance: dai-tdm-slot-num = <2>; dai-tdm-slot-width = <8>; And for each spcified driver, there could be one .of_xlate_tdm_slot_mask() to specify a explicit mapping of the channels and the slots. If it's absent the default snd_soc_of_xlate_tdm_slot_mask() will be used to generating the tx and rx masks. For snd_soc_of_xlate_tdm_slot_mask(), the tx and rx masks will use a 1 bit for an active slot as default, and the default active bits are at the LSB of the masks. Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com> Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'include/sound/soc-dai.h')
-rw-r--r--include/sound/soc-dai.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h
index 71f27c403194..d86e0fc41e80 100644
--- a/include/sound/soc-dai.h
+++ b/include/sound/soc-dai.h
@@ -142,6 +142,8 @@ struct snd_soc_dai_ops {
* Called by soc_card drivers, normally in their hw_params.
*/
int (*set_fmt)(struct snd_soc_dai *dai, unsigned int fmt);
+ int (*of_xlate_tdm_slot_mask)(unsigned int slots,
+ unsigned int *tx_mask, unsigned int *rx_mask);
int (*set_tdm_slot)(struct snd_soc_dai *dai,
unsigned int tx_mask, unsigned int rx_mask,
int slots, int slot_width);