f3e03e2eb0
We found that adding load, Rx data sometimes drops.(with DMA transfer mode)
The cause is that before starting Rx-DMA processing, Tx-DMA processing starts.
This causes FIFO overrun occurs.
This patch fixes the issue by modifying FIFO tx-threshold and DMA descriptor
size like below.
Current this patch
Rx-descriptor 4Byte+12Byte*341 --> 12Byte*340-4Byte-12Byte
Rx-threshold (Not modified)
Tx-descriptor 4Byte+12Byte*341 --> 16Byte-12Byte*340
Rx-threshold 12Byte --> 2Byte
Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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| .. | ||
| Kconfig | ||
| Makefile | ||
| spi-altera.c | ||
| spi-ath79.c | ||
| spi-atmel.c | ||
| spi-au1550.c | ||
| spi-bfin-sport.c | ||
| spi-bfin5xx.c | ||
| spi-bitbang-txrx.h | ||
| spi-bitbang.c | ||
| spi-butterfly.c | ||
| spi-coldfire-qspi.c | ||
| spi-davinci.c | ||
| spi-dw-mid.c | ||
| spi-dw-mmio.c | ||
| spi-dw-pci.c | ||
| spi-dw.c | ||
| spi-dw.h | ||
| spi-ep93xx.c | ||
| spi-fsl-espi.c | ||
| spi-fsl-lib.c | ||
| spi-fsl-lib.h | ||
| spi-fsl-spi.c | ||
| spi-gpio.c | ||
| spi-imx.c | ||
| spi-lm70llp.c | ||
| spi-mpc52xx-psc.c | ||
| spi-mpc52xx.c | ||
| spi-mpc512x-psc.c | ||
| spi-nuc900.c | ||
| spi-oc-tiny.c | ||
| spi-omap-100k.c | ||
| spi-omap-uwire.c | ||
| spi-omap2-mcspi.c | ||
| spi-orion.c | ||
| spi-pl022.c | ||
| spi-ppc4xx.c | ||
| spi-pxa2xx-pci.c | ||
| spi-pxa2xx.c | ||
| spi-s3c24xx-fiq.S | ||
| spi-s3c24xx-fiq.h | ||
| spi-s3c24xx.c | ||
| spi-s3c64xx.c | ||
| spi-sh-msiof.c | ||
| spi-sh-sci.c | ||
| spi-sh.c | ||
| spi-stmp.c | ||
| spi-tegra.c | ||
| spi-ti-ssp.c | ||
| spi-tle62x0.c | ||
| spi-topcliff-pch.c | ||
| spi-txx9.c | ||
| spi-xilinx.c | ||
| spi.c | ||
| spidev.c | ||