target/linux/layerscape/patches-5.4/806-dma-0015-MLK-19022-2-dmaengine-fsl-edma-v3-add-device_synchro.patch

   1 From 0ae3e11113b3132167308c26259f25b504da6ddc Mon Sep 17 00:00:00 2001
   2 From: Robin Gong <yibin.gong@nxp.com>
   3 Date: Tue, 24 Jul 2018 22:12:24 +0800
   4 Subject: [PATCH] MLK-19022-2: dmaengine: fsl-edma-v3: add device_synchronize
   5
   6 Add device_synchronize for edma driver, since some driver such as
   7 Audio need it to make sure dma done callback never come out after
   8 resource related with dma channel free-ed by Audio driver. Android
   9 team report such issue on MA-12087.
  10
  11 Signed-off-by: Robin Gong <yibin.gong@nxp.com>
  12 (cherry picked from commit 483519c063b08fc1ce0dd297b6c186799cf639d6)
  13 (cherry picked from commit 29ab274aca01ef8f5fc70e8c0a6d43a5bdb3c689)
  14 ---
  15  drivers/dma/fsl-edma-v3.c | 8 ++++++++
  16  1 file changed, 8 insertions(+)
  17
  18 --- a/drivers/dma/fsl-edma-v3.c
  19 +++ b/drivers/dma/fsl-edma-v3.c
  20 @@ -812,6 +812,13 @@ static void fsl_edma3_free_chan_resource
  21         fsl_chan->used = false;
  22  }
  23
  24 +static void fsl_edma3_synchronize(struct dma_chan *chan)
  25 +{
  26 +       struct fsl_edma3_chan *fsl_chan = to_fsl_edma3_chan(chan);
  27 +
  28 +       vchan_synchronize(&fsl_chan->vchan);
  29 +}
  30 +
  31  static int fsl_edma3_probe(struct platform_device *pdev)
  32  {
  33         struct device_node *np = pdev->dev.of_node;
  34 @@ -927,6 +934,7 @@ static int fsl_edma3_probe(struct platfo
  35         fsl_edma3->dma_dev.device_resume = fsl_edma3_resume;
  36         fsl_edma3->dma_dev.device_terminate_all = fsl_edma3_terminate_all;
  37         fsl_edma3->dma_dev.device_issue_pending = fsl_edma3_issue_pending;
  38 +       fsl_edma3->dma_dev.device_synchronize = fsl_edma3_synchronize;
  39
  40         fsl_edma3->dma_dev.src_addr_widths = FSL_EDMA_BUSWIDTHS;
  41         fsl_edma3->dma_dev.dst_addr_widths = FSL_EDMA_BUSWIDTHS;