From 0f65c306a55ab6a8e8148b6d9c966a1d214ae3c9 Mon Sep 17 00:00:00 2001 From: Martin Sperl Date: Wed, 16 Mar 2016 12:24:56 -0700 Subject: [PATCH] dmaengine: bcm2835: remove unnecessary masking of dma channels The original patch contained 3 dma channels that were masked out. These - as far as research and discussions show - are a artefacts remaining from the downstream legacy dma-api. Right now down-stream still includes a legacy api used only in a single (downstream only) driver (bcm2708_fb) that requires 2D DMA for speedup (DMA-channel 0). Formerly the sd-card support driver also was using this legacy api (DMA-channel 2), but since has been moved over to use dmaengine directly. The DMA-channel 3 is already masked out in the devicetree in the default property "brcm,dma-channel-mask = <0x7f35>;" So we can remove the whole masking of DMA channels. Signed-off-by: Martin Sperl Reviewed-by: Eric Anholt Signed-off-by: Eric Anholt Signed-off-by: Vinod Koul --- drivers/dma/bcm2835-dma.c | 9 --------- 1 file changed, 9 deletions(-) --- a/drivers/dma/bcm2835-dma.c +++ b/drivers/dma/bcm2835-dma.c @@ -123,9 +123,6 @@ struct bcm2835_desc { #define BCM2835_DMA_DATA_TYPE_S32 4 #define BCM2835_DMA_DATA_TYPE_S128 16 -#define BCM2835_DMA_BULK_MASK BIT(0) -#define BCM2835_DMA_FIQ_MASK (BIT(2) | BIT(3)) - /* Valid only for channels 0 - 14, 15 has its own base address */ #define BCM2835_DMA_CHAN(n) ((n) << 8) /* Base address */ #define BCM2835_DMA_CHANIO(base, n) ((base) + BCM2835_DMA_CHAN(n)) @@ -641,12 +638,6 @@ static int bcm2835_dma_probe(struct plat goto err_no_dma; } - /* - * Do not use the FIQ and BULK channels, - * because they are used by the GPU. - */ - chans_available &= ~(BCM2835_DMA_FIQ_MASK | BCM2835_DMA_BULK_MASK); - for (i = 0; i < pdev->num_resources; i++) { irq = platform_get_irq(pdev, i); if (irq < 0)