From e1b16311d08288e4d1db28ff38f37419dbed436a Mon Sep 17 00:00:00 2001
From: 3djc <5167938+3djc@users.noreply.github.com>
Date: Thu, 8 Jan 2026 03:50:23 +0100
Subject: [PATCH] fix: ensure ws2812 DMA transfer is completed before disabling
 channel (#6961)

---
 radio/src/targets/common/arm/stm32/stm32_ws2812.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/radio/src/targets/common/arm/stm32/stm32_ws2812.cpp b/radio/src/targets/common/arm/stm32/stm32_ws2812.cpp
index 0ad3c21ba..647a2fe07 100644
--- a/radio/src/targets/common/arm/stm32/stm32_ws2812.cpp
+++ b/radio/src/targets/common/arm/stm32/stm32_ws2812.cpp
@@ -139,6 +139,12 @@ static void _update_dma_buffer(const stm32_pulse_timer_t* tim, uint8_t tc)
     LL_DMA_DisableIT_TC(tim->DMAx, tim->DMA_Stream);
     LL_DMA_DisableIT_HT(tim->DMAx, tim->DMA_Stream);
     LL_DMA_DisableStream(tim->DMAx, tim->DMA_Stream);
+
+    uint32_t timeout = 1000;
+    while (LL_DMA_IsEnabledStream(tim->DMAx, tim->DMA_Stream) && timeout--) 	{
+      __NOP();  // Wait
+    }
+
     LL_TIM_CC_DisableChannel(tim->TIMx, tim->TIM_Channel);
   }
   WS2812_DBG_LOW;