From e698fbe598def25a1aa3e2a2625144817f2fa12d Mon Sep 17 00:00:00 2001
From: elagil <elagil@takanome.de>
Date: Tue, 10 Sep 2024 21:33:31 +0200
Subject: [PATCH] fix: pull-down clock/data lines for receive

---
 embassy-stm32/src/sai/mod.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/embassy-stm32/src/sai/mod.rs b/embassy-stm32/src/sai/mod.rs
index 6bf184dd8..63f48ace0 100644
--- a/embassy-stm32/src/sai/mod.rs
+++ b/embassy-stm32/src/sai/mod.rs
@@ -661,12 +661,12 @@ fn get_af_types(mode: Mode, tx_rx: TxRx) -> (AfType, AfType) {
         //sd is defined by tx/rx mode
         match tx_rx {
             TxRx::Transmitter => AfType::output(OutputType::PushPull, Speed::VeryHigh),
-            TxRx::Receiver => AfType::input(Pull::None),
+            TxRx::Receiver => AfType::input(Pull::Down), // Ensure mute level when no input is connected.
         },
         //clocks (mclk, sck and fs) are defined by master/slave
         match mode {
             Mode::Master => AfType::output(OutputType::PushPull, Speed::VeryHigh),
-            Mode::Slave => AfType::input(Pull::None),
+            Mode::Slave => AfType::input(Pull::Down), // Ensure no clocks when no input is connected.
         },
     )
 }