From: Viresh Kumar Date: Fri, 4 Mar 2011 10:12:50 +0000 (+0530) Subject: dw_dmac: Change value of DWC_MAX_COUNT to 4095. X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=418e74070662e1ae7d9bb5202f773d35c9a7f05e;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git dw_dmac: Change value of DWC_MAX_COUNT to 4095. Every descriptor can transfer a maximum count of 4095 (12 bits, in control reg), So we must have DWC_MAX_COUNT as 4095 instead of 2048. Signed-off-by: Viresh Kumar Signed-off-by: Vinod Koul --- diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c index e5d97bf9264a..711ebe954f5b 100644 --- a/drivers/dma/dw_dmac.c +++ b/drivers/dma/dw_dmac.c @@ -47,14 +47,13 @@ /* * This is configuration-dependent and usually a funny size like 4095. - * Let's round it down to the nearest power of two. * * Note that this is a transfer count, i.e. if we transfer 32-bit - * words, we can do 8192 bytes per descriptor. + * words, we can do 16380 bytes per descriptor. * * This parameter is also system-specific. */ -#define DWC_MAX_COUNT 2048U +#define DWC_MAX_COUNT 4095U /* * Number of descriptors to allocate for each channel. This should be