Hi Sahaj, On Mon, 18 Nov 2019 at 00:09, Sahaj Sarup <sahajsa...@gmail.com> wrote: > > see in-line... > > On Mon, 18 Nov 2019 at 11:16, Simon Glass <s...@chromium.org> wrote: > > > > Hi Sahaj, > > > > On Sun, 17 Nov 2019 at 21:33, Sahaj Sarup <sahajsa...@gmail.com> wrote: > > > > > > Hi All, > > > > > > I was wondering if you could answer a few questions regarding u-boot > > > on Asus CP101 gru/bob ? > > > > > > - To test the u-boot image following README.chromium-chainload, > > > should I expect output on the display or do I need > > > CDD/SuzyQable Cable for serial? > > > > The display should work OK. I don't think that device supports CCD. > > Well since the display is blank and the uboot.bin and uboot.fit have > a correct 0x100 offset, I'll need to wait for my CCD cable to arrive. > Bob in fact supports ccd: > https://www.chromium.org/chromium-os/developer-information-for-chrome-os-devices > Although, i am confused as well since edp is supported, at least in > the dts files.
Then I suspect it is broken. > > > > > > > > > - The CONFIG_SYS_TEXT_BASE is currently 0x00200000 but > > > shouldn't it be CONFIG_SYS_TEXT_BASE=0x20000100 > > > since its supposed to match CONFIG_KERNEL_START > > > from /chromiumos/platform/depthcharge/board/gru/defconfig > > > > Yes it is a bit annoying because the in-house bootloader doesn't > > support FIT properly. As I recall you have to set it to the exact > > address that it appears in the FIT. > > > > > > > > - In order to flash to spi, what's the procedure? > > > > The chain load option doesn't use SPI flash. You actually sign the > > image and put it into the kernel partition. > > > > I know... > > > Not much help for you, but there is a new feature on more recent > > Chromebooks called 'altfw' (alternative firmware) and if enabled, it > > lets you press 1 to boot U-Boot (only in dev mode). It only works on > > x86 devices so far and even then the device support is pretty basic if > > it boots at all. But the good thing is that you can put things into > > the altfw partition in SPI flash and they will boot without affecting > > the device. > > > > hmm.. but what about the whole remove the secure screw procedure and > enable flash writes? Not needed if you are chain loading, nor with altfw. You can use it if you build a raw U-Boot, but need a way of recovering it! > I know vaguely about it. Regards, Simon _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
