diff options
| -rw-r--r-- | drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c | 8 | ||||
| -rw-r--r-- | drivers/dma/dw-axi-dmac/dw-axi-dmac.h | 1 |
2 files changed, 9 insertions, 0 deletions
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 a1dddec95316..88d4923dee6c 100644 --- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c @@ -12,6 +12,7 @@ #include <linux/device.h> #include <linux/dmaengine.h> #include <linux/dmapool.h> +#include <linux/dma-mapping.h> #include <linux/err.h> #include <linux/interrupt.h> #include <linux/io.h> @@ -1340,6 +1341,13 @@ static int dw_probe(struct platform_device *pdev) dw->dma.device_prep_slave_sg = dw_axi_dma_chan_prep_slave_sg; dw->dma.device_prep_dma_cyclic = dw_axi_dma_chan_prep_cyclic; + /* + * Synopsis DesignWare AxiDMA datasheet mentioned Maximum + * supported blocks is 1024. Device register width is 4 bytes. + * Therefore, set constraint to 1024 * 4. + */ + dw->dma.dev->dma_parms = &dw->dma_parms; + dma_set_max_seg_size(&pdev->dev, MAX_BLOCK_SIZE); platform_set_drvdata(pdev, chip); pm_runtime_enable(chip->dev); diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h index 3a357f7fda02..1e937ea2a96d 100644 --- a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h @@ -54,6 +54,7 @@ struct axi_dma_chan { struct dw_axi_dma { struct dma_device dma; struct dw_axi_dma_hcfg *hdata; + struct device_dma_parameters dma_parms; /* channels */ struct axi_dma_chan *chan; |