diff --git a/src/libcamera/software_isp/debayer_cpu.cpp b/src/libcamera/software_isp/debayer_cpu.cpp
index 077f7f4bc45b..8a757fe9e02d 100644
--- a/src/libcamera/software_isp/debayer_cpu.cpp
+++ b/src/libcamera/software_isp/debayer_cpu.cpp
@@ -12,8 +12,11 @@
 #include "debayer_cpu.h"
 
 #include <stdlib.h>
+#include <sys/ioctl.h>
 #include <time.h>
 
+#include <linux/dma-buf.h>
+
 #include <libcamera/formats.h>
 
 #include "libcamera/internal/bayer_format.h"
@@ -718,12 +721,33 @@ void DebayerCpu::process4(const uint8_t *src, uint8_t *dst)
 	}
 }
 
-static inline int64_t timeDiff(timespec &after, timespec &before)
+namespace {
+
+void syncBufferForCPU(FrameBuffer *buffer, uint64_t syncFlags)
+{
+	for (const FrameBuffer::Plane &plane : buffer->planes()) {
+		const int fd = plane.fd.get();
+		struct dma_buf_sync sync = { syncFlags };
+		int ret;
+
+		ret = ioctl(fd, DMA_BUF_IOCTL_SYNC, &sync);
+		if (ret < 0) {
+			ret = errno;
+			LOG(Debayer, Error)
+				<< "Syncing buffer FD " << fd << " with flags "
+				<< syncFlags << " failed: " << strerror(ret);
+		}
+	}
+}
+
+inline int64_t timeDiff(timespec &after, timespec &before)
 {
 	return (after.tv_sec - before.tv_sec) * 1000000000LL +
 	       (int64_t)after.tv_nsec - (int64_t)before.tv_nsec;
 }
 
+} /* namespace */
+
 void DebayerCpu::process(FrameBuffer *input, FrameBuffer *output, DebayerParams params)
 {
 	timespec frameStartTime;
@@ -733,6 +757,9 @@ void DebayerCpu::process(FrameBuffer *input, FrameBuffer *output, DebayerParams
 		clock_gettime(CLOCK_MONOTONIC_RAW, &frameStartTime);
 	}
 
+	syncBufferForCPU(input, DMA_BUF_SYNC_START | DMA_BUF_SYNC_READ);
+	syncBufferForCPU(output, DMA_BUF_SYNC_START | DMA_BUF_SYNC_WRITE);
+
 	green_ = params.green;
 	red_ = swapRedBlueGains_ ? params.blue : params.red;
 	blue_ = swapRedBlueGains_ ? params.red : params.blue;
@@ -760,6 +787,9 @@ void DebayerCpu::process(FrameBuffer *input, FrameBuffer *output, DebayerParams
 
 	metadata.planes()[0].bytesused = out.planes()[0].size();
 
+	syncBufferForCPU(output, DMA_BUF_SYNC_END | DMA_BUF_SYNC_WRITE);
+	syncBufferForCPU(input, DMA_BUF_SYNC_END | DMA_BUF_SYNC_READ);
+
 	/* Measure before emitting signals */
 	if (measuredFrames_ < DebayerCpu::kLastFrameToMeasure &&
 	    ++measuredFrames_ > DebayerCpu::kFramesToSkip) {