From ce4ad55a5af4d55e6813094392ebd2d52319a0ae Mon Sep 17 00:00:00 2001
From: Simon Egli <4662005+Deadolus@users.noreply.github.com>
Date: Tue, 17 May 2022 18:07:35 +0200
Subject: [PATCH] SPI DMA workaround

Described in https://github.com/jgarff/rpi_ws281x/issues/499
---
 ws2811.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/ws2811.c b/ws2811.c
index 6482796..598217b 100644
--- a/ws2811.c
+++ b/ws2811.c
@@ -1200,6 +1200,9 @@ ws2811_return_t  ws2811_render(ws2811_t *ws2811)
                     {
                         uint32_t *wordptr = &((uint32_t *)pxl_raw)[wordpos];   // PWM & PCM
                         volatile uint8_t  *byteptr = &pxl_raw[bytepos];    // SPI
+                        if((bitpos == 7) && (l == 0)) {
+                          break;
+                        }
 
                         if (driver_mode == SPI)
                         {