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The CPU and codec channel masks are not necessarily the same, and are quite likely different. SoundWire and I2S/TDM both support assigning different sample slots to each codec, so for example channel 0 on each codec could map to different channels at the CPU. It is also possible for one TX channel to map to multiple RX channels. So it isn't _always_ safe to assume that the total number of set bits in the CPU ch_mask is the same as the total number of enabled channels on the codec. For example consider this mapping on a capture stream: CPU0 CODEC0 cpu_ch_mask = 0x03 CPU1 CODEC0 cpu_ch_mask = 0x03 This could be either four TX channels on the codec split across two receiving CPUs, or two TX channels on the codec duplicated to two CPUs. Signed-off-by: Richard Fitzgerald --- include/sound/soc.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/sound/soc.h b/include/sound/soc.h index 94c9b75e27e3..5afc34b147b5 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -700,6 +700,7 @@ struct snd_soc_dai_link_ch_map { unsigned int cpu; unsigned int codec; unsigned int cpu_ch_mask; + unsigned int codec_ch_mask; }; struct snd_soc_dai_link { -- 2.47.3