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ASoC: SOF: update gain ipc msg definition to align with fw
Fw uses latest 64 bits curve_duration in gain ipc msg definition so update kernel driver side. Curve_duration is in number of hundreds nanoseconds, and only 32 bits int can support up to 400s volume ramp, which is enough for ramp feature, so we don't need to support 64 bits read by topology. Now divide 64 bits curve_duration to two parts: low part set by topology and high part zeroed in driver. Signed-off-by: Rander Wang <[email protected]>
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