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| author |   Andrew Bresticker <abrestic@chromium.org> | 2014-12-22 11:35:15 -0800 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2014-12-24 12:20:03 +0000 |
| commit | 76fe5e95fac3c93bdff9102480e5ba823ba656c3 (patch) | |
| tree | 7d6ef466527abcf12936e2b1a461cadf8ab3c139 /drivers/spi/spi-img-spfi.c | |
| parent | spi: img-spfi: Enable controller before starting TX DMA (diff) | |
| download | linux-dev-76fe5e95fac3c93bdff9102480e5ba823ba656c3.tar.xz linux-dev-76fe5e95fac3c93bdff9102480e5ba823ba656c3.zip | |
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 <abrestic@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-img-spfi.c')
| -rw-r--r-- | drivers/spi/spi-img-spfi.c | 4 |
1 files changed, 2 insertions, 2 deletions
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); |