Hi Matt, On 27.08.2012 17:33, Daniel Mack wrote: > On 23.08.2012 03:09, Matt Porter wrote: >> This series begins the conversion of the DaVinci private EDMA API >> implementation to a DMA engine driver and converts two of the three >> in-kernel users of the private EDMA API to DMA engine. >> >> The approach taken is similar to the recent OMAP DMA Engine >> conversion. The EDMA DMA Engine driver is a wrapper around the existing >> private EDMA implementation and registers the platform device within >> the driver. This allows the conversion series to stand alone with just >> the drivers and no changes to platform code. It also allows peripheral >> drivers to continue to use the private EDMA implementation until they >> are converted. >> >> The EDMA DMA Engine driver supports slave transfers only at this time. It >> is planned to add cyclic transfers in support of audio peripherals. >> >> There are three users of the private EDMA API in the kernel now: >> davinci_mmc, spi-davinci, and davinci-mcasp. This series provides DMA >> Engine conversions for the davinci_mmc and spi-davinci drivers which >> use the supported slave transfers. >> >> This series has been tested on an AM18x EVM and Hawkboard with >> driver performance comparable to that of the private EDMA API >> implementations. Both MMC0 and MMC1 are tested which handles the >> DA850/OMAP-L138/AM18x specific case where MMC1 uses DMA channels on >> a second EDMA channel controller. All other platforms have a simpler >> design with just a single EDMA channel controller. >> >> For those wanting to easily test this series, I've pushed a branch for >> each version to my github tree at https://github.com/ohporter/linux. The >> current branch is edma-dmaengine-v3. >> >> After this series, the current plan is to complete the mcasp driver >> conversion which includes adding cyclic dma support. This will then >> enable the removal and refactoring of the private EDMA API functionality >> into the EDMA DMA Engine driver. Since EDMA is also used on the AM33xx >> family of parts in mach-omap2/, the plan is to enable this driver on >> that platform as well. > > Once you have a patch for the McASP driver conversion, I can happily > test this on a AM33xx board, together with Gururaja's latest McASP > refactoring series. Let me know how I can help you here. Did you find some time yet to continue on this side? I don't want to appear pushy, but as I need to finish some DT transition on a AM33xx-based board, I would much like to help out here, in case I can do anything to help speed things along. Many thanks for your work! Daniel -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
