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| author | Robin Gong <yibin.gong@nxp.com> | 2019-01-08 12:00:16 +0000 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2019-01-08 22:33:27 +0530 |
| commit | ad0d92d7ba6aecbe2705907c38ff8d8be4da1e9c (patch) | |
| tree | beb1c87d6655091345e119e04a5dd6df900e5290 /drivers/dma/imx-sdma.c | |
| parent | bfeffd155283772bbe78c6a05dec7c0128ee500c (diff) | |
| download | linux-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.c | 7 |
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) |