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[v2,3/6] dmaengine: sprd: Fix the incorrect start for 2-stage destination channels

Message ID dc1c179c93ac1cc2d6f19d0675f3241900813900.1557127239.git.baolin.wang@linaro.org
State New
Headers show
Series Fix some bugs and add new feature for Spreadtrum DMA engine | expand

Commit Message

(Exiting) Baolin Wang May 6, 2019, 7:28 a.m. UTC 
From: Eric Long <eric.long@unisoc.com>


The 2-stage destination channel will be triggered by source channel
automatically, which means we should not trigger it by software request.

Signed-off-by: Eric Long <eric.long@unisoc.com>

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>

---
 drivers/dma/sprd-dma.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

-- 
1.7.9.5
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Patch

diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c
index 431e289..0f92e60 100644
--- a/drivers/dma/sprd-dma.c
+++ b/drivers/dma/sprd-dma.c
@@ -510,7 +510,9 @@  static void sprd_dma_start(struct sprd_dma_chn *schan)
 	sprd_dma_set_uid(schan);
 	sprd_dma_enable_chn(schan);
 
-	if (schan->dev_id == SPRD_DMA_SOFTWARE_UID)
+	if (schan->dev_id == SPRD_DMA_SOFTWARE_UID &&
+	    schan->chn_mode != SPRD_DMA_DST_CHN0 &&
+	    schan->chn_mode != SPRD_DMA_DST_CHN1)
 		sprd_dma_soft_request(schan);
 }