| snd_soc_dai_set_tdm_slot(9) - phpMan
SND_SOC_DAI_SET_TDM_(9) ASoC SND_SOC_DAI_SET_TDM_(9)
NAME
snd_soc_dai_set_tdm_slot - Configures a DAI for TDM operation
SYNOPSIS
int snd_soc_dai_set_tdm_slot(struct snd_soc_dai * dai, unsigned int tx_mask,
unsigned int rx_mask, int slots, int slot_width);
ARGUMENTS
dai
The DAI to configure
tx_mask
bitmask representing active TX slots.
rx_mask
bitmask representing active RX slots.
slots
Number of slots in use.
slot_width
Width in bits for each slot.
DESCRIPTION
This function configures the specified DAI for TDM operation. slot contains the total
number of slots of the TDM stream and slot_with the width of each slot in bit clock
cycles. tx_mask and rx_mask are bitmasks specifying the active slots of the TDM stream
for the specified DAI, i.e. which slots the DAI should write to or read from. If a bit is
set the corresponding slot is active, if a bit is cleared the corresponding slot is
inactive. Bit 0 maps to the first slot, bit 1 to the second slot and so on. The first
active slot maps to the first channel of the DAI, the second active slot to the second
channel and so on.
TDM mode can be disabled by passing 0 for slots. In this case tx_mask, rx_mask and
slot_width will be ignored.
Returns 0 on success, a negative error code otherwise.
COPYRIGHT
Kernel Hackers Manual 4.8. January 2017 SND_SOC_DAI_SET_TDM_(9)
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