On Thu, Oct 22, 2020 at 10:52:21AM +0300, Alexander Kochetkov wrote: > From: Alexander Kochetkov <al.kochet@xxxxxxxxx> > > 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@xxxxxxxxx> Acked-by: Maxime Ripard <mripard@xxxxxxxxxx> Thanks! Maxime
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