Hi Dafna, On Fri, 28 Jan 2022 at 04:49, Dafna Hirschfeld <dafna.hirschfeld@xxxxxxxxxxxxx> wrote: > > Hi > > I have some messy notes here of what I found out so far, some dumps of > > the vendor driver running etc: > > https://github.com/linux-chenxing/linux-chenxing.org/blob/master/ip/vdec.md > > I see that you test the content of 0x1f344000 with 'devmem', what make you test this specific address? In the binary module from the vendor instead of getting the address from DT they have hardcoded it in the ioremap() call to map the device registers. Just after that they add 0x800 to the resulting address resulting in 0x1f344800. I think they are trying to ioremap() at page alignment or something but the registers actually start at 0x800. Cheers, Daniel
