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Add per-stream fade controls for the Tegra mixer to allow
independently configuring target gain and fade duration for each of
the 10 input streams (RX1 through RX10).
The following controls are added per stream:
"RXn Fade Duration" - fade duration in samples (N3 parameter)
"RXn Fade Gain" - target gain level for fade
A strobe control commits all pending fade configurations:
"Fade Switch" - 1 = apply staged gain/duration and start fades
0 = disable sample count for all fading streams
A read-only status control reports per-stream fade state:
"Fade Status" - per-stream state for all 10 RX inputs
0 = idle, 1 = active
Usage example (fade 2 streams simultaneously):
amixer -c <card> cset name="RX1 Fade Duration" 1024
amixer -c <card> cset name="RX1 Fade Gain" 12000
amixer -c <card> cset name="RX2 Fade Duration" 2048
amixer -c <card> cset name="RX2 Fade Gain" 15000
amixer -c <card> cset name="Fade Switch" 1
Signed-off-by: Sheetal <sheetal@nvidia.com>
Link: https://patch.msgid.link/20260506102032.1644851-1-sheetal@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Linux kernel ============ The Linux kernel is the core of any Linux operating system. It manages hardware, system resources, and provides the fundamental services for all other software. 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