diff mbox series

[v6,3/4] dmaengine: dw-axi-dmac: Increase polling time to DMA transmission completion status

Message ID 20230322094820.24738-4-walker.chen@starfivetech.com (mailing list archive)
State Accepted
Commit ce62432cb8bb56a5fde544d01213e952c3a92f8b
Headers show
Series Add DMA driver for StarFive JH7110 SoC | expand

Commit Message

Walker Chen March 22, 2023, 9:48 a.m. UTC
The bit DMAC_CHEN[0] is automatically cleared by hardware to disable the
channel after the last AMBA transfer of the DMA transfer to the
destination has completed. Software can therefore poll this bit to
determine when this channel is free for a new DMA transfer.
This time requires at least 40 milliseconds on JH7110 SoC, otherwise an
error message 'failed to stop' will be reported.

Signed-off-by: Walker Chen <walker.chen@starfivetech.com>
 drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series


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 6cfcb541d8c3..6937cc0c0b65 100644
--- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
+++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
@@ -1147,7 +1147,7 @@  static int dma_chan_terminate_all(struct dma_chan *dchan)
 	ret = readl_poll_timeout_atomic(chan->chip->regs + DMAC_CHEN, val,
-					!(val & chan_active), 1000, 10000);
+					!(val & chan_active), 1000, 50000);
 	if (ret == -ETIMEDOUT)
 			 "%s failed to stop\n", axi_chan_name(chan));