On Mon, 20 Dec 2021 at 20:08, Paul Cercueil <paul@xxxxxxxxxxxxxxx> wrote: > > Hi Ulf, > > This patchset adds support for using a single DMA channel for both RX > and TX operations, instead of using separate DMA channels for each > operation. > > As some older Ingenic SoCs offer only a handful of DMA channels, > supporting bi-directional channels allow more hardware to use the > channels that would otherwise be used for the MMC/SD operation. > > Note that the Device Tree binding for the DMA controller has been > updated in a (already merged) patchset, so that it accepts a 3 cells > (#dma-cells == 3) instead of just 2. It was merged in the DMA tree, so I > am not sure the autobuilders will like this YAML - but it was checked > without errors. > > I also removed the descriptions of the "dmas" property in the YAML, as > they really weren't adding anything and were getting in my way. > > There are patches touching the driver file merged in the PM tree (the > ones that use the new PM macros) but I expect no problem here, they > touch different parts of the file. > > Cheers, > -Paul > > Paul Cercueil (2): > dt-bindings: mmc: ingenic: Support using bi-directional DMA channel > mmc: jz4740: Support using a bi-directional DMA channel > > .../devicetree/bindings/mmc/ingenic,mmc.yaml | 37 ++++++++++++++++--- > drivers/mmc/host/jz4740_mmc.c | 19 +++++++++- > 2 files changed, 48 insertions(+), 8 deletions(-) > Applied for next, thanks! Let's see how this goes when the changes hit linux-next. I will have to drop them, if we encounter any problems. Kind regards Uffe
