From 782e6c538be43a17e34f552ab49e8c713cac7883 Mon Sep 17 00:00:00 2001 From: Richard Fitzgerald Date: Mon, 29 Jan 2024 16:27:27 +0000 Subject: ASoC: cs35l56: Fix default SDW TX mixer registers Patch the SDW TX mixer registers to silicon defaults. CS35L56 is designed for SDCA and a generic SDCA driver would know nothing about these chip-specific registers. So the firmware sets up the SDW TX mixer registers to whatever audio is relevant on a specific system. This means that the driver cannot assume the initial values of these registers. But Linux has ALSA controls to configure routing, so the registers can be patched to silicon default and the ALSA controls used to select what audio to feed back to the host capture path. Backport note: This won't apply to kernels older than v6.6. Signed-off-by: Richard Fitzgerald Fixes: e49611252900 ("ASoC: cs35l56: Add driver for Cirrus Logic CS35L56") Link: https://msgid.link/r/20240129162737.497-9-rf@opensource.cirrus.com Signed-off-by: Mark Brown --- sound/soc/codecs/cs35l56-shared.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'sound') diff --git a/sound/soc/codecs/cs35l56-shared.c b/sound/soc/codecs/cs35l56-shared.c index 35789ffc63af..a812abf90836 100644 --- a/sound/soc/codecs/cs35l56-shared.c +++ b/sound/soc/codecs/cs35l56-shared.c @@ -12,6 +12,15 @@ #include "cs35l56.h" static const struct reg_sequence cs35l56_patch[] = { + /* + * Firmware can change these to non-defaults to satisfy SDCA. + * Ensure that they are at known defaults. + */ + { CS35L56_SWIRE_DP3_CH1_INPUT, 0x00000018 }, + { CS35L56_SWIRE_DP3_CH2_INPUT, 0x00000019 }, + { CS35L56_SWIRE_DP3_CH3_INPUT, 0x00000029 }, + { CS35L56_SWIRE_DP3_CH4_INPUT, 0x00000028 }, + /* These are not reset by a soft-reset, so patch to defaults. */ { CS35L56_MAIN_RENDER_USER_MUTE, 0x00000000 }, { CS35L56_MAIN_RENDER_USER_VOLUME, 0x00000000 }, -- cgit v1.2.3