Thank you Clement! Ah, ok, yes from Allwinner I suppose. Good day, Pablo
> On Aug 1, 2022, at 3:48 PM, Clément Péron <peron.c...@gmail.com> wrote: > > Hi Pablo, > > On Mon, 1 Aug 2022 at 20:15, 'Pablo De Paulis' via linux-sunxi > <linux-sunxi@googlegroups.com <mailto:linux-sunxi@googlegroups.com>> wrote: >> >> Hi Clement, >> Yes, indeed we have our Olimex board working in 5.10 for the most part, so >> its device tree is indeed merged in. >> >> I saw that Status Matrix awhile back indeed, and so we were encouraged; >> however we hit a wall when a bunch of DMA source files, in particular: >> <mach/platform.h> >> <plat/sys_config.h> >> <mach/dma.h> >> #linux-sunxi/arch/arm/mach-sun7i/include/mach/dma.h >> <mach/clock.h> >> >> aren't available in the 5.10 source tree. >> There are other dma.h in the 5.10 source tree but none has the definitions >> found in the sunxi 3.4 source tree, i.e.: >> https://github.com/linux-sunxi/linux-sunxi/blob/sunxi-3.4/arch/arm/mach-sun7i/include/mach/dma.h > > This DMA API is vendor specific and can't be upstreamed. > > The kernel have one: > https://www.kernel.org/doc/html/v5.10/driver-api/dma-buf.html > <https://www.kernel.org/doc/html/v5.10/driver-api/dma-buf.html> > >> >> Our board adds a device for telephone interface that uses the A20 DMA and >> its module requires these dma-interface files to build it, so we are not >> able to build it in the 5.10. > > You need to convert your module to use the kernel one. > > Regards, > >> >> Again the only reference to, at least some of these files was in the >> conversation from Benoit Masson circa 2013 with a patch for spi_sunixi >> unified sun7i support. >> >> Pablo >> >> On Monday, August 1, 2022 at 12:03:45 PM UTC-4 peron...@gmail.com wrote: >>> >>> Hi Pablo, >>> >>> >>> On Mon, 1 Aug 2022 at 16:13, 'Pablo De Paulis' via linux-sunxi >>> <linux...@googlegroups.com> wrote: >>>> >>>> Greetings, >>>> I recently joined this group, so apologies in advance if I'm off here, but >>>> my understanding is that the group consists of several notorious >>>> contributors in the effort to bring sun7i linux (stuck in 3.x kernel) to >>>> mainline Linux kernel. >>>> We've been trying to find out if a DMA support for the A20 SoC has been >>>> merged. >>>> >>>> We are using Olimex-linux 5.10.105 (for a A20-OLinuXino-micro offshoot), >>>> and when trying to build a kernel module we can't find some files, in >>>> particular what used to be: >>>> >>>> linux-sunxi/arch/arm/mach-sun7i/include/mach/dma.h >>>> >>>> Found a message from Mr. Masson circa 2013 with a patch for spi_sunixi >>>> unified sun7i support which included the aforementioned dma.h, among >>>> others. That patch never really made it. >>>> >>>> The last message I found Benoit mentioned something along the lines of >>>> "using Ryan’s sun7i Normal DMA version". >>>> >>>> There's also extensive work from Mr. Ripard and Mr. Lopez on patches to >>>> support the DMA engine present on Allwinner A10, A13, A10S and A20 SoCs >>>> circa 2015, but somehow the interface provided by the sunxi 3.4 Linux is >>>> not there. >>>> >>>> Looking into the Bootlin I can also not find the aforementioned file. Also >>>> looked in the olimex-linux menuconfig in DMA support, but there's nothing >>>> that resembles A20 DMA support. >>>> >>>> So, it looks like that particular DMA interface never made it into >>>> mainline. >>> >>> https://linux-sunxi.org/Linux_mainlining_effort#Status_Matrix >>> Show DMA for A20 merged in 4.3 >>> >>> Seems also present in device-tree: >>> https://github.com/torvalds/linux/blob/master/arch/arm/boot/dts/sun7i-a20.dtsi#L327-L333 >>> >>> Also your board seems supported: >>> https://github.com/torvalds/linux/blob/master/arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts >>> >>> Regards >>> >>>> >>>> Again, apologies in advance if this is not the right place for these types >>>> of questions, but if anyone has any leads or information it'd be >>>> appreciated. >>>> >>>> Best, >>>> Pablo >>>> >>>> -- >>>> You received this message because you are subscribed to the Google Groups >>>> "linux-sunxi" group. >>>> To unsubscribe from this group and stop receiving emails from it, send an >>>> email to linux-sunxi...@googlegroups.com. >>>> To view this discussion on the web, visit >>>> https://groups.google.com/d/msgid/linux-sunxi/83038138-f6d9-4929-92f0-a1a50ce939f4n%40googlegroups.com. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "linux-sunxi" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to linux-sunxi+unsubscr...@googlegroups.com >> <mailto:linux-sunxi+unsubscr...@googlegroups.com>. >> To view this discussion on the web, visit >> https://groups.google.com/d/msgid/linux-sunxi/d9cc8750-268d-4049-8397-97f22719ff64n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/linux-sunxi/d9cc8750-268d-4049-8397-97f22719ff64n%40googlegroups.com>. -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. 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