Commit 49873e99 authored Jan 13, 2017 by Linus Walleij Committed by Vinod Koul Jan 14, 2017

dmaengine: ste_dma40: indicate directions on channels



Since the introduction of the .directions flags, ste_dma40 was
never patched to indicate which transfer directions it can manage.
This causes a problem when trying to use the dmaengine for generic
ALSA SoC DMA:

ux500-msp-i2s.1: Failed to get DMA channel capabilities, falling
   back to period counting: -6

This patch fixes this issue by indicating the supported transfer
directions for slave and memcpy channels.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

parent 0c744ea4

drivers/dma/ste_dma40.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -2809,12 +2809,14 @@ static void __init d40_chan_init(struct d40_base base, struct dma_device dma,

		static void d40_ops_init(struct d40_base base, struct dma_device dev)
		{
		if (dma_has_cap(DMA_SLAVE, dev->cap_mask))
		if (dma_has_cap(DMA_SLAVE, dev->cap_mask)) {
		dev->device_prep_slave_sg = d40_prep_slave_sg;
		dev->directions = BIT(DMA_DEV_TO_MEM) \| BIT(DMA_MEM_TO_DEV);
		}

		if (dma_has_cap(DMA_MEMCPY, dev->cap_mask)) {
		dev->device_prep_dma_memcpy = d40_prep_memcpy;

		dev->directions = BIT(DMA_MEM_TO_MEM);
		/*
		* This controller can only access address at even
		* 32bit boundaries, i.e. 2^2

Admin message