On Thu, Oct 22, 2020 at 10:52:21AM +0300, Alexander Kochetkov wrote:
> From: Alexander Kochetkov <al.kochet@gmail.com>
> 
> DMA-based transfer will be enabled if data length is larger than FIFO size
> (64 bytes for A64). This greatly reduce number of interrupts for
> transferring data.
> 
> For smaller data size PIO mode will be used. In PIO mode whole buffer will
> be loaded into FIFO.
> 
> If driver failed to request DMA channels then it fallback for PIO mode.
> 
> Tested on SOPINE (https://www.pine64.org/sopine/)
> 
> Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com>

Acked-by: Maxime Ripard <mripard@kernel.org>

Thanks!
Maxime