124 lines
2.4 KiB
Plaintext
124 lines
2.4 KiB
Plaintext
# Low Latency Passthrough with volume Pipeline and PCM
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#
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# Pipeline Endpoints for connection are :-
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#
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# host PCM_P --> B0 --> Volume 0 --> B1 --> sink DAI0
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# Include topology builder
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include(`local.m4')
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#
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# Controls
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#
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SectionControlMixer.STR(Master Playback Volume) {
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# control belongs to this index group
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index STR(PIPELINE_ID)
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# Channel register and shift for Front Left/Right
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channel."FL" {
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reg "1"
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shift "0"
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}
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channel."FR" {
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reg "1"
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shift "1"
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}
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# control uses bespoke driver get/put/info ID 0
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ops."ctl" {
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info "volsw"
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get "256"
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put "256"
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}
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# TLV 32 steps from -90dB to +6dB for 3dB
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max "32"
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invert "false"
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tlv "vtlv_m90s3"
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}
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#
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# Components and Buffers
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#
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# Host "Passthrough Playback" PCM uses pipeline DMAC and channel
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# with 2 sink and 0 source periods
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W_PCM_PLAYBACK(Passthrough Playback, PIPELINE_DMAC, PIPELINE_DMAC_CHAN, 2, 0, 2)
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# "Volume" has 2 source and 2 sink periods
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W_PGA(0, Master Playback Volume, PIPELINE_FORMAT, 2, 2, 2)
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# Playback Buffers
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W_BUFFER(0, COMP_BUFFER_SIZE(2,
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COMP_SAMPLE_SIZE(PIPELINE_FORMAT), PIPELINE_CHANNELS, SCHEDULE_FRAMES))
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W_BUFFER(1, COMP_BUFFER_SIZE(2,
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COMP_SAMPLE_SIZE(PIPELINE_FORMAT), PIPELINE_CHANNELS, SCHEDULE_FRAMES))
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#
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# DAI definitions
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#
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W_DAI_OUT(DAI_SNAME, DAI_TYPE, DAI_INDEX, DAI_FORMAT, 0, DAI_PERIODS,
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DAI_PERIODS, dai0p_plat_conf)
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#
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# DAI pipeline - always use 0 for DAIs
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#
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W_PIPELINE(N_DAI_OUT, SCHEDULE_DEADLINE, SCHEDULE_PRIORITY, SCHEDULE_FRAMES,
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SCHEDULE_CORE, 0, pipe_dai_schedule_plat)
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#
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# Pipeline Graph
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#
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# host PCM_P --> B0 --> Volume 0 --> B1 --> sink DAI0
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SectionGraph."pipe-pass-vol-playback-PIPELINE_ID" {
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index STR(PIPELINE_ID)
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lines [
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dapm(N_PCM, Passthrough Playback PCM_ID)
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dapm(N_BUFFER(0), N_PCM)
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dapm(N_PGA(0), N_BUFFER(0))
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dapm(N_BUFFER(1), N_PGA(0))
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dapm(N_DAI_OUT, N_BUFFER(1))
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]
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}
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#
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# PCM Configuration
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#
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SectionPCMCapabilities.STR(Passthrough Playback PCM_ID) {
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formats "S32_LE,S24_LE,S16_LE"
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rate_min "48000"
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rate_max "48000"
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channels_min "2"
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channels_max "4"
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periods_min "2"
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periods_max "16"
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period_size_min "192"
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period_size_max "16384"
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buffer_size_min "65536"
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buffer_size_max "65536"
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}
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# PCM Passthrough Playback
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SectionPCM.STR(PCM PCM_ID) {
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index STR(PIPELINE_ID)
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# used for binding to the PCM
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id STR(PCM_ID)
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dai.STR(Passthrough Playback PCM_ID) {
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id STR(PCM_ID)
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}
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pcm."playback" {
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capabilities STR(Passthrough Playback PCM_ID)
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}
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}
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