[PATCH 2/5] dma: add dma mask interface in probe
From: Kaiwei Liu <hidden>
Date: 2023-08-07 05:20:45
Also in:
lkml
Subsystem:
dma generic offload engine subsystem, the rest · Maintainers:
Vinod Koul, Linus Torvalds
In the probe of DMA, the default addressing range is 32 bits, while the actual DMA hardware addressing range used is 36 bits. So add dma_set_mask_and_coherent function to match DMA addressing range. Signed-off-by: Kaiwei Liu <redacted> --- drivers/dma/sprd-dma.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c
index 20c3cb1ef2f5..0e146550dfbb 100644
--- a/drivers/dma/sprd-dma.c
+++ b/drivers/dma/sprd-dma.c@@ -1115,6 +1115,15 @@ static int sprd_dma_probe(struct platform_device *pdev) u32 chn_count; int ret, i; + ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(36)); + if (ret) { + ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); + if (ret) { + dev_err(&pdev->dev, "dma_set_mask_and_coherent failed\n"); + return ret; + } + } + /* Parse new and deprecated dma-channels properties */ ret = device_property_read_u32(&pdev->dev, "dma-channels", &chn_count); if (ret)
--
2.17.1