[U-Boot] [PATCH 0/4] Ability to load linux kernel on rock2 RK3288

[Sandy Patterson]

Ziyuan,

I retested the kernel loading. I'm using 3.14 kernel. I also tested with
linux-4.7-rc6. I still require both the cache reverts and disabling
efi_loader on u-boot/master and u-boot-rockchip/master. (see below for
testing parameters)

Hans,
I have been unable to boot an RK3288 rock2 square board since v2016.03
release. The kernel fails to start.

Before reverting I get this on my console:

Starting kernel ...

### ERROR ### Please RESET the board ###

Another possibly related problem which has similar effect without the ERROR
potion above is a call to invalidate_icache_all() from efi_runtime.c.
Commenting out this line or disabled CONFIG_EFI_LOADER seems to allow the
kernel to boot.

testing:
board: radxa rock2 square
kernel: 3.14 custom, and linux-4.7-rc6 - multi_v7_defconfig zImage
rk3288-radxa-rock.dtb
toolchain: gcc-linaro-5.3-2016.02-x86_64_arm-linux-gnueabi
loading from sd card - the actual loading seems fine though. I'm not sure
how emmc would change anything.

booting command for 4.7 (we use and care about 3.14, but i thought it would
be easier to show with 4.7-rc6. I get the same behavior with 3.14):
setenv bootargs root=/dev/mmcblk0p4
ext4load mmc 0:3 0x02000000 /zImage; ext4load mmc 0:3 0x01f00000
/rk3288-rock2-square.dtb
bootz 0x02000000 - 0x01f00000

u-boot/master: 95d52733036af7438a5285d729d53844ec48c63e
CONFIG_EFI_LOADER=n and cache reverts required to load kernel
*_high changes don't seem to be required anymore

u-boot-rockchip: 1781acd31b01225402167fbdb8fa97157cc269eb
CONFIG_EFI_LOADER=n and cache reverts required to load kernel
*_high changes don't seem to be required anymore

Sandy Patterson


On Thu, Jul 21, 2016 at 11:21 PM, Simon Glass <sjg at chromium.org> wrote:

> +Hans, Tom
>
> Hi Sandy,
>
> On 15 July 2016 at 07:40, Sandy Patterson <apatterson at sightlogix.com>
> wrote:
> > Hi Simon,
> >
> > I think I screwed up submitting, and didn't cc the maintainers for the
> > reverts. I can resubmit and get patman to behave. What do you suggest?
> >
> > I still think this is the best patch to getting rock2 to load kernels
> again.
> >
> > I just retested with a patch specific to my kernel. I think 3.14 linux
> has
> > some quirks in how it wants the dram setup, and I get instability without
> > some changes to the dram init. I don't have enough of a system to test
> for
> > this instability using the latest mainline kernel, so I left that patch
> out.
> >
> > Ziyuan had an alternative fix for efi_loader, but it looks like it may
> break
> > efi_loader for others, and I don't know how to test the efi
> functionality,
> > so I think disabling for RK3288 is best. I think I should move the
> > CONFIG_EFI_LOADER patch to somehow patching rk3288_common.h instead (can
> I
> > #undef config vars in that file?)
>
> Yes please can you resend and cc the maintainers and original author.
> Patman -t should do this automatically.
>
> Also with the revert of Han's ARM patches, please can you describe the
> problem so it is clear why we need to revert?
>
> Regards,
> Simon
>
> [...]
>