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| author | Xiubo Li <Li.Xiubo@freescale.com> | 2014-02-14 09:34:35 +0800 |
|---|---|---|
| committer | Stephane Desneux <stephane.desneux@open.eurogiciel.org> | 2015-02-04 11:13:26 +0100 |
| commit | 3c584e7b7f3af023b68e5d5c2f42dd63dacc6770 (patch) | |
| tree | 92723ed43a2a30a0af9b1d969655367cc2109c04 /include | |
| parent | 1fdaeac286c3de6960c6603da04bfe06abbe1ddf (diff) | |
| download | linux-stable-3c584e7b7f3af023b68e5d5c2f42dd63dacc6770.tar.gz linux-stable-3c584e7b7f3af023b68e5d5c2f42dd63dacc6770.tar.bz2 linux-stable-3c584e7b7f3af023b68e5d5c2f42dd63dacc6770.zip | |
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>
(cherry picked from commit 89c6785715592a6b082b3f9f28c27bb14b041c7d)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Diffstat (limited to 'include')
| -rw-r--r-- | include/sound/soc-dai.h | 2 | ||||
| -rw-r--r-- | include/sound/soc.h | 3 |
2 files changed, 5 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); diff --git a/include/sound/soc.h b/include/sound/soc.h index 465dc6e0674d..2a878d03c147 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -1175,6 +1175,9 @@ int snd_soc_of_parse_card_name(struct snd_soc_card *card, const char *propname); int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card, const char *propname); +int snd_soc_of_parse_tdm_slot(struct device_node *np, + unsigned int *slots, + unsigned int *slot_width); int snd_soc_of_parse_audio_routing(struct snd_soc_card *card, const char *propname); unsigned int snd_soc_of_parse_daifmt(struct device_node *np, |