On Fri, Jun 06, 2014 at 01:45:09AM +0800, Chew Chiau Ee wrote: > From: Chew, Chiau Ee <[email protected]> > > This is to fix the SPI DMA transfer failure for speed less than 1M. > If using current DMA burst size setting (16), the Rx data bytes are > invalid due to each data byte is multiplied according to the burst > size setting. > > Let's said supposedly we shall receive the following 18 bytes of data: > 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 > Instead, the data bytes received consist of "16 bytes of '01' + > 2 bytes of '02'" : > 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 02 02 > > Signed-off-by: Chew, Chiau Ee <[email protected]> > Cc: Mika Westerberg <[email protected]>
Works for me (and individual chips can tune this by passing custom dma_burst_size if needed). Acked-by: Mika Westerberg <[email protected]> -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
