layerscape: add patches-5.4

[openwrt/staging/wigyori.git] / target / linux / layerscape / patches-5.4 / 806-dma-0004-MLK-15003-1-DMA-fsl-edma-v3-add-one-more-parameter-f.patch

diff --git a/target/linux/layerscape/patches-5.4/806-dma-0004-MLK-15003-1-DMA-fsl-edma-v3-add-one-more-parameter-f.patch b/target/linux/layerscape/patches-5.4/806-dma-0004-MLK-15003-1-DMA-fsl-edma-v3-add-one-more-parameter-f.patch
new file mode 100644 (file)
index 0000000..1af6c7e
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/806-dma-0004-MLK-15003-1-DMA-fsl-edma-v3-add-one-more-parameter-f.patch
@@ -0,0 +1,53 @@
+From f8692ecd13a787c51eca9234312f5f3fd163a04a Mon Sep 17 00:00:00 2001
+From: Shengjiu Wang <shengjiu.wang@freescale.com>
+Date: Mon, 5 Jun 2017 11:05:52 +0800
+Subject: [PATCH] MLK-15003-1: DMA: fsl-edma-v3: add one more parameter for
+ xlate
+
+The parameter is "is_remote", which is to use remote access for
+edma, the default access is local access.
+
+Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
+(cherry picked from commit eee976b30b0523680f30e762742984f5b5a01b97)
+---
+ drivers/dma/fsl-edma-v3.c | 8 +++++++-
+ 1 file changed, 7 insertions(+), 1 deletion(-)
+
+--- a/drivers/dma/fsl-edma-v3.c
++++ b/drivers/dma/fsl-edma-v3.c
+@@ -139,6 +139,7 @@ struct fsl_edma3_chan {
+       int                             hw_chanid;
+       int                             priority;
+       int                             is_rxchan;
++      int                             is_remote;
+       struct dma_pool                 *tcd_pool;
+       u32                             chn_real_count;
+       char                            txirq_name[32];
+@@ -189,6 +190,10 @@ static void fsl_edma3_enable_request(str
+               else
+                       val |= EDMA_CH_SBR_WR;
+       }
++
++      if (fsl_chan->is_remote)
++              val &= ~(EDMA_CH_SBR_RD | EDMA_CH_SBR_WR);
++
+       writel(val, addr + EDMA_CH_SBR);
+ 
+       val = readl(addr + EDMA_CH_CSR);
+@@ -686,7 +691,7 @@ static struct dma_chan *fsl_edma3_xlate(
+       struct dma_chan *chan, *_chan;
+       struct fsl_edma3_chan *fsl_chan;
+ 
+-      if (dma_spec->args_count != 3)
++      if (dma_spec->args_count != 4)
+               return NULL;
+ 
+       mutex_lock(&fsl_edma3->fsl_edma3_mutex);
+@@ -701,6 +706,7 @@ static struct dma_chan *fsl_edma3_xlate(
+                       chan->device->privatecnt++;
+                       fsl_chan->priority = dma_spec->args[1];
+                       fsl_chan->is_rxchan = dma_spec->args[2];
++                      fsl_chan->is_remote = dma_spec->args[3];
+                       mutex_unlock(&fsl_edma3->fsl_edma3_mutex);
+                       return chan;
+               }