30 lines
1.1 KiB
Plaintext
30 lines
1.1 KiB
Plaintext
TDM slot:
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This specifies audio DAI's TDM slot.
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TDM slot properties:
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dai-tdm-slot-num : Number of slots in use.
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dai-tdm-slot-width : Width in bits for each slot.
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dai-tdm-slot-tx-mask : Transmit direction slot mask, optional
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dai-tdm-slot-rx-mask : Receive direction slot mask, optional
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For instance:
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dai-tdm-slot-num = <2>;
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dai-tdm-slot-width = <8>;
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dai-tdm-slot-tx-mask = <0 1>;
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dai-tdm-slot-rx-mask = <1 0>;
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And for each spcified driver, there could be one .of_xlate_tdm_slot_mask()
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to specify a explicit mapping of the channels and the slots. If it's absent
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the default snd_soc_of_xlate_tdm_slot_mask() will be used to generating the
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tx and rx masks.
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For snd_soc_of_xlate_tdm_slot_mask(), the tx and rx masks will use a 1 bit
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for an active slot as default, and the default active bits are at the LSB of
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the masks.
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The explicit masks are given as array of integers, where the first
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number presents bit-0 (LSB), second presents bit-1, etc. Any non zero
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number is considered 1 and 0 is 0. snd_soc_of_xlate_tdm_slot_mask()
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does not do anything, if either mask is set non zero value.
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