| Message ID | 20201012181815.339056-1-seanga2@gmail.com |
|---|---|
| State | Accepted |
| Commit | 963911e9e1c17b2f973ff49ddd51060d6c340c5f |
| Delegated to: | Andes |
| Headers | show |
| Series | riscv: k210: Reduce DMA block size | expand |
> Although the max DMA size supported by the hardware register is 22 bits (or > 4M), the Linux driver for this device only supports transfers of up to 2M. > On a device with 8M total memory, I don't think it will make too much of a > difference. > > Reported-by: Damien Le Moal <Damien.LeMoal@wdc.com> > Signed-off-by: Sean Anderson <seanga2@gmail.com> > --- > > arch/riscv/dts/k210.dtsi | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > Reviewed-by: Rick Chen <rick@andestech.com>
diff --git a/arch/riscv/dts/k210.dtsi b/arch/riscv/dts/k210.dtsi index 84cff51c36..2e1e2683c1 100644 --- a/arch/riscv/dts/k210.dtsi +++ b/arch/riscv/dts/k210.dtsi @@ -199,8 +199,8 @@ dma-channels = <6>; snps,dma-masters = <2>; snps,data-width = <5>; - snps,block-size = <0x400000 0x400000 0x400000 - 0x400000 0x400000 0x400000>; + snps,block-size = <0x200000 0x200000 0x200000 + 0x200000 0x200000 0x200000>; snps,axi-max-burst-len = <256>; status = "disabled"; };
Although the max DMA size supported by the hardware register is 22 bits (or 4M), the Linux driver for this device only supports transfers of up to 2M. On a device with 8M total memory, I don't think it will make too much of a difference. Reported-by: Damien Le Moal <Damien.LeMoal@wdc.com> Signed-off-by: Sean Anderson <seanga2@gmail.com> --- arch/riscv/dts/k210.dtsi | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)