ASoC: tegra: Add per-stream Mixer Fade controls

Browse source

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>

...

This commit is contained in:

Sheetal 2026-05-06 10:20:32 +00:00 • committed by Mark Brown

parent 42f67e1d1c

commit 36645381b8

No known key found for this signature in database

GPG key ID: 24D68B725D5487D0

2 changed files with 278 additions and 7 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

266

sound/soc/tegra/tegra210_mixer.c

View file

19

sound/soc/tegra/tegra210_mixer.h

View file