[PATCH v12 04/17] dmaengine: dw-axi-dmac: Add device_synchronize() callback

From: Sia Jee Heng
Date: Sun Jan 24 2021 - 20:55:44 EST


Add support for device_synchronize() callback function to sync with
dmaengine_terminate_sync().

Signed-off-by: Sia Jee Heng <jee.heng.sia@xxxxxxxxx>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Reviewed-by: Eugeniy Paltsev <Eugeniy.Paltsev@xxxxxxxxxxxx>
Tested-by: Eugeniy Paltsev <Eugeniy.Paltsev@xxxxxxxxxxxx>
---
drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
index 3737e1c3c793..241ab7a24e2a 100644
--- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
+++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
@@ -347,6 +347,13 @@ static void dma_chan_issue_pending(struct dma_chan *dchan)
spin_unlock_irqrestore(&chan->vc.lock, flags);
}

+static void dw_axi_dma_synchronize(struct dma_chan *dchan)
+{
+ struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan);
+
+ vchan_synchronize(&chan->vc);
+}
+
static int dma_chan_alloc_chan_resources(struct dma_chan *dchan)
{
struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan);
@@ -940,6 +947,7 @@ static int dw_probe(struct platform_device *pdev)
dw->dma.device_free_chan_resources = dma_chan_free_chan_resources;

dw->dma.device_prep_dma_memcpy = dma_chan_prep_dma_memcpy;
+ dw->dma.device_synchronize = dw_axi_dma_synchronize;

platform_set_drvdata(pdev, chip);

--
2.18.0