From: Andrew Bresticker Date: Mon, 22 Dec 2014 19:35:15 +0000 (-0800) Subject: spi: img-spfi: Increase DMA burst size X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=76fe5e95fac3c93bdff9102480e5ba823ba656c3;p=openwrt%2Fstaging%2Fblogic.git spi: img-spfi: Increase DMA burst size A 1-byte burst size is rather inefficient and has been shown to cause TX issues during testing. Increase the DMA burst size to 4-bytes for both RX and TX DMA when using the 8-bit FIFO. Signed-off-by: Andrew Bresticker Signed-off-by: Mark Brown --- diff --git a/drivers/spi/spi-img-spfi.c b/drivers/spi/spi-img-spfi.c index cd14556852bf..aad6683db81b 100644 --- a/drivers/spi/spi-img-spfi.c +++ b/drivers/spi/spi-img-spfi.c @@ -341,7 +341,7 @@ static int img_spfi_start_dma(struct spi_master *master, default: rxconf.src_addr = spfi->phys + SPFI_RX_8BIT_VALID_DATA; rxconf.src_addr_width = 1; - rxconf.src_maxburst = 1; + rxconf.src_maxburst = 4; } dmaengine_slave_config(spfi->rx_ch, &rxconf); @@ -368,7 +368,7 @@ static int img_spfi_start_dma(struct spi_master *master, default: txconf.dst_addr = spfi->phys + SPFI_TX_8BIT_VALID_DATA; txconf.dst_addr_width = 1; - txconf.dst_maxburst = 1; + txconf.dst_maxburst = 4; break; } dmaengine_slave_config(spfi->tx_ch, &txconf);