1 files changed, 41 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/806-dma-0015-MLK-19022-2-dmaengine-fsl-edma-v3-add-device_synchro.patch b/target/linux/layerscape/patches-5.4/806-dma-0015-MLK-19022-2-dmaengine-fsl-edma-v3-add-device_synchro.patch
new file mode 100644
index 0000000000..5e1eb8b83e
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/806-dma-0015-MLK-19022-2-dmaengine-fsl-edma-v3-add-device_synchro.patch
@@ -0,0 +1,41 @@
+From 0ae3e11113b3132167308c26259f25b504da6ddc Mon Sep 17 00:00:00 2001
+From: Robin Gong <yibin.gong@nxp.com>
+Date: Tue, 24 Jul 2018 22:12:24 +0800
+Subject: [PATCH] MLK-19022-2: dmaengine: fsl-edma-v3: add device_synchronize
+
+Add device_synchronize for edma driver, since some driver such as
+Audio need it to make sure dma done callback never come out after
+resource related with dma channel free-ed by Audio driver. Android
+team report such issue on MA-12087.
+
+Signed-off-by: Robin Gong <yibin.gong@nxp.com>
+(cherry picked from commit 483519c063b08fc1ce0dd297b6c186799cf639d6)
+(cherry picked from commit 29ab274aca01ef8f5fc70e8c0a6d43a5bdb3c689)
+---
+ drivers/dma/fsl-edma-v3.c | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+--- a/drivers/dma/fsl-edma-v3.c
++++ b/drivers/dma/fsl-edma-v3.c
+@@ -812,6 +812,13 @@ static void fsl_edma3_free_chan_resource
+ 	fsl_chan->used = false;
+ }
+ 
++static void fsl_edma3_synchronize(struct dma_chan *chan)
++{
++	struct fsl_edma3_chan *fsl_chan = to_fsl_edma3_chan(chan);
++
++	vchan_synchronize(&fsl_chan->vchan);
++}
++
+ static int fsl_edma3_probe(struct platform_device *pdev)
+ {
+ 	struct device_node *np = pdev->dev.of_node;
+@@ -927,6 +934,7 @@ static int fsl_edma3_probe(struct platfo
+ 	fsl_edma3->dma_dev.device_resume = fsl_edma3_resume;
+ 	fsl_edma3->dma_dev.device_terminate_all = fsl_edma3_terminate_all;
+ 	fsl_edma3->dma_dev.device_issue_pending = fsl_edma3_issue_pending;
++	fsl_edma3->dma_dev.device_synchronize = fsl_edma3_synchronize;
+ 
+ 	fsl_edma3->dma_dev.src_addr_widths = FSL_EDMA_BUSWIDTHS;
+ 	fsl_edma3->dma_dev.dst_addr_widths = FSL_EDMA_BUSWIDTHS;