Heiko, On Fri, Aug 14, 2015 at 3:13 PM, Heiko Stübner <heiko@xxxxxxxxx> wrote: > Hi Shawn, > > Am Freitag, 14. August 2015, 16:34:35 schrieb Shawn Lin: >> DesignWare MMC Controller can supports two types of DMA >> mode: external dma and internal dma. We get a RK312x platform >> integrated dw_mmc and ARM pl330 dma controller. This patch add >> edmac ops to support these platforms. I've tested it on RK312x >> platform with edmac mode and RK3288 platform with idmac mode. >> >> Signed-off-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx> > > judging by your "from", I guess you're running this on some older Rockchip soc > without the idma? Because I tried testing this on a Radxa Rock, but only got > failures, from the start (failed to read card status register). In PIO mode > everything works again. > > > I guess I overlooked just some tiny detail, but to me the dma channel ids seem > correct after all. Maybe you have any hints what I'm doing wrong? If I were a guessing man (which I'm not), I'd guess that perhaps you're running into troubles with our friend the PL330. There appear to be strange issues with the PL330 on Rockchip SoCs. I was only peripherally involved with them, but I know at least about some of the patches in our tree, like: https://chromium-review.googlesource.com/237607 FROMLIST: DMA: pl330: support burst mode for dev-to-mem and mem-to-dev transmit https://chromium-review.googlesource.com/237393 CHROMIUM: dmaengine: pl330: support quirks for some broken https://chromium-review.googlesource.com/237396 CHROMIUM: dmaengine: pl330: add quirk for broken no flushp https://chromium-review.googlesource.com/237394 CHROMIUM: ARM: dts: rockchip: Add broken-no-flushp into rk3288.dtsi https://chromium-review.googlesource.com/242063 CHROMIUM: ASoC: rockchip_i2s: modify DMA max burst to 1
