On Oct 5, 2016, at 1:54 PM, Vagrant Cascadian <vagr...@debian.org> wrote:
> On 2016-10-01, Rick Thomas wrote: >> On Jun 5, 2016, at 1:35 PM, Vagrant Cascadian <vagr...@debian.org> wrote: >>> On 2016-06-05, Gaudenz Steinlin wrote: >>>> I have the same problem with my Cubox-i 4x4. Is there any progress on >>>> this? > ... >>>> Are the patches incorporated into the latest version in experimental? >>> >>> No, it requires a patch that does run-time detection. At least the >>> versions of u-boot in debian currently boot on both cubox-i4x4 and >>> cubox-i4pro, even if it limits ram to 2gb on the i4x4. >>> >>> >>>> Is there anything I could test to get this into Debian? >>> >>> Someone could write a patch acceptible for u-boot upstream that does >>> run-time detection... there may be folks on #u-boot on irc.freenode.net >>> willing to help a bit. >>> >>> It also might be good to file a bug report against the u-boot-imx >>> package in Debian at this point, so that the issue can at least be >>> tracked appropriately. > ... >> Sorry to bring this back up after such a long time, but I had a couple >> of thoughts that I’d like to bounce off those more knowledgable than >> I. >> >> Would it be possible to do one or the other of these two: >> >> 1) Put the 2GB vs 4GB setting in the .dtb file. >> >> 2) Put setting in a kernel command line argument. > > I believe it actually requires u-boot to initialize ram timings and > various other parameters. You can trick the kernel into using more > memory, but in my experience that just caused crashes when trying to use > more ram than u-boot initilized. > > It would of course be useful to experiment with alternative methods, but > my guess is getting proper patches into u-boot may likely be the > simplest approach. It just takes some work. scanning the subject lines in the u-boot list, it looks like somebody has made this work for a different (from the Cubox) architecture. > Subject: Re: [U-Boot] [PATCH v2 2/3] rk3288: sdram: auto-detect the > capacity Would you be interested in getting it to work on the Cubox i-4x4? It looks like the next couple of weeks for me will be free enough to do some testing, if you’re willing. Rick
