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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 <viresh.kumar@st.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
hifive-unleashed-5.1
Viresh Kumar 2011-03-04 15:42:50 +05:30 committed by Vinod Koul
parent a02274564d
commit 418e740706
1 changed files with 2 additions and 3 deletions
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5
drivers/dma/dw_dmac.c
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@ -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