ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/target/linux/layerscape/patches-5.4/806-dma-0019-dmaengine-fsl-edma-calculate-the-real-count-for-slav.patch b/target/linux/layerscape/patches-5.4/806-dma-0019-dmaengine-fsl-edma-calculate-the-real-count-for-slav.patch
new file mode 100644
index 0000000..f8bbaaf
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/806-dma-0019-dmaengine-fsl-edma-calculate-the-real-count-for-slav.patch
@@ -0,0 +1,70 @@
+From 7b126c5fbddf179c7d2c2393100329aa45cd8ac4 Mon Sep 17 00:00:00 2001
+From: Fugang Duan <fugang.duan@nxp.com>
+Date: Fri, 9 Aug 2019 15:14:08 +0800
+Subject: [PATCH] dmaengine: fsl-edma: calculate the real count for slave sg
+
+Calculate the rela count for current slave sg after eDMA stop.
+
+Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
+---
+ drivers/dma/fsl-edma-common.c | 11 ++++++++++-
+ drivers/dma/fsl-edma-common.h | 2 ++
+ drivers/dma/fsl-edma.c | 1 +
+ 3 files changed, 13 insertions(+), 1 deletion(-)
+
+--- a/drivers/dma/fsl-edma-common.c
++++ b/drivers/dma/fsl-edma-common.c
+@@ -305,6 +305,11 @@ static size_t fsl_edma_desc_residue(stru
+ return len;
+ }
+
++void fsl_edma_get_realcnt(struct fsl_edma_chan *fsl_chan)
++{
++ fsl_chan->chn_real_count = fsl_edma_desc_residue(fsl_chan, NULL, true);
++}
++
+ enum dma_status fsl_edma_tx_status(struct dma_chan *chan,
+ dma_cookie_t cookie, struct dma_tx_state *txstate)
+ {
+@@ -314,8 +319,12 @@ enum dma_status fsl_edma_tx_status(struc
+ unsigned long flags;
+
+ status = dma_cookie_status(chan, cookie, txstate);
+- if (status == DMA_COMPLETE)
++ if (status == DMA_COMPLETE) {
++ spin_lock_irqsave(&fsl_chan->vchan.lock, flags);
++ txstate->residue = fsl_chan->chn_real_count;
++ spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags);
+ return status;
++ }
+
+ if (!txstate)
+ return fsl_chan->status;
+--- a/drivers/dma/fsl-edma-common.h
++++ b/drivers/dma/fsl-edma-common.h
+@@ -126,6 +126,7 @@ struct fsl_edma_chan {
+ u32 dma_dev_size;
+ enum dma_data_direction dma_dir;
+ char chan_name[16];
++ u32 chn_real_count;
+ };
+
+ struct fsl_edma_desc {
+@@ -229,6 +230,7 @@ int fsl_edma_pause(struct dma_chan *chan
+ int fsl_edma_resume(struct dma_chan *chan);
+ int fsl_edma_slave_config(struct dma_chan *chan,
+ struct dma_slave_config *cfg);
++void fsl_edma_get_realcnt(struct fsl_edma_chan *fsl_chan);
+ enum dma_status fsl_edma_tx_status(struct dma_chan *chan,
+ dma_cookie_t cookie, struct dma_tx_state *txstate);
+ struct dma_async_tx_descriptor *fsl_edma_prep_dma_cyclic(
+--- a/drivers/dma/fsl-edma.c
++++ b/drivers/dma/fsl-edma.c
+@@ -53,6 +53,7 @@ static irqreturn_t fsl_edma_tx_handler(i
+ }
+
+ if (!fsl_chan->edesc->iscyclic) {
++ fsl_edma_get_realcnt(fsl_chan);
+ list_del(&fsl_chan->edesc->vdesc.node);
+ vchan_cookie_complete(&fsl_chan->edesc->vdesc);
+ fsl_chan->edesc = NULL;