Commit c8d11a06 authored by Scott Jiang's avatar Scott Jiang Committed by Bob Liu
Browse files

bfin: add 32M, 16M and 8M uncached DMA region options 



We need larger DMA region to support HD video.

Signed-off-by: default avatarScott Jiang <scott.jiang.linux@gmail.com>
Signed-off-by: default avatarBob Liu <lliubbo@gmail.com>
parent 2cdd7008

arch/blackfin/Kconfig

+6 −0
Original line number Diff line number Diff line
@@ -1009,6 +1009,12 @@ config HAVE_PWM 
choice

	prompt "Uncached DMA region"

	default DMA_UNCACHED_1M

config DMA_UNCACHED_32M

	bool "Enable 32M DMA region"

config DMA_UNCACHED_16M

	bool "Enable 16M DMA region"

config DMA_UNCACHED_8M

	bool "Enable 8M DMA region"

config DMA_UNCACHED_4M

	bool "Enable 4M DMA region"

config DMA_UNCACHED_2M

arch/blackfin/include/asm/bfin-global.h

+7 −1
Original line number Diff line number Diff line
@@ -14,7 +14,13 @@ 
#include <linux/linkage.h>

#include <linux/types.h>



#if defined(CONFIG_DMA_UNCACHED_4M)

#if defined(CONFIG_DMA_UNCACHED_32M)

# define DMA_UNCACHED_REGION (32 * 1024 * 1024)

#elif defined(CONFIG_DMA_UNCACHED_16M)

# define DMA_UNCACHED_REGION (16 * 1024 * 1024)

#elif defined(CONFIG_DMA_UNCACHED_8M)

# define DMA_UNCACHED_REGION (8 * 1024 * 1024)

#elif defined(CONFIG_DMA_UNCACHED_4M)

# define DMA_UNCACHED_REGION (4 * 1024 * 1024)

#elif defined(CONFIG_DMA_UNCACHED_2M)

# define DMA_UNCACHED_REGION (2 * 1024 * 1024)

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