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authorRobin Gong <yibin.gong@nxp.com>2019-01-08 12:00:16 +0000
committerVinod Koul <vkoul@kernel.org>2019-01-08 22:33:27 +0530
commitad0d92d7ba6aecbe2705907c38ff8d8be4da1e9c (patch)
treebeb1c87d6655091345e119e04a5dd6df900e5290 /drivers/dma/imx-sdma.c
parentbfeffd155283772bbe78c6a05dec7c0128ee500c (diff)
downloadlinux-ad0d92d7ba6aecbe2705907c38ff8d8be4da1e9c.tar.bz2
dmaengine: imx-sdma: refine to load context only once
The context loaded only one time before channel running,but currently sdma_config_channel() and dma_prep_* duplicated with sdma_load_context(), so refine it to load context only one time before channel running and reload after the channel terminated. Signed-off-by: Robin Gong <yibin.gong@nxp.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/imx-sdma.c')
-rw-r--r--drivers/dma/imx-sdma.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index a2b0a0e71168..015c17a3b826 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -377,6 +377,7 @@ struct sdma_channel {
unsigned long watermark_level;
u32 shp_addr, per_addr;
enum dma_status status;
+ bool context_loaded;
struct imx_dma_data data;
struct work_struct terminate_worker;
};
@@ -970,6 +971,9 @@ static int sdma_load_context(struct sdma_channel *sdmac)
int ret;
unsigned long flags;
+ if (sdmac->context_loaded)
+ return 0;
+
if (sdmac->direction == DMA_DEV_TO_MEM)
load_address = sdmac->pc_from_device;
else if (sdmac->direction == DMA_DEV_TO_DEV)
@@ -1012,6 +1016,8 @@ static int sdma_load_context(struct sdma_channel *sdmac)
spin_unlock_irqrestore(&sdma->channel_0_lock, flags);
+ sdmac->context_loaded = true;
+
return ret;
}
@@ -1051,6 +1057,7 @@ static void sdma_channel_terminate_work(struct work_struct *work)
sdmac->desc = NULL;
spin_unlock_irqrestore(&sdmac->vc.lock, flags);
vchan_dma_desc_free_list(&sdmac->vc, &head);
+ sdmac->context_loaded = false;
}
static int sdma_disable_channel_async(struct dma_chan *chan)