Re: [PATCH v2 0/3] board: sophgo: milkv_duo: enable standard boot

[Hiago De Franco <hfranco@baylibre.com>]

Hi Yao Zi,

On Fri, Oct 09, 2026 at 11:58:21AM -0300, Hiago De Franco wrote:
> The Milk-V Duo (CV1800B, 64MB) does not enable CONFIG_BOOTSTD_DEFAULTS
> and has no environment file, so U-Boot has no bootcmd and none of the
> kernel_addr_r, fdt_addr_r, ramdisk_addr_r, ... variables required by
> the extlinux bootmeth.
> 
> Enable CONFIG_BOOTSTD_DEFAULTS and add a milkv_duo.env with a memory
> layout that fits into the 64MB of DRAM:
> 
>   0x80200000  kernel_addr_r       (16MB)
>   0x81200000  kernel_comp_addr_r  (16MB, Image.gz decompression)
>   0x82200000  fdt_addr_r
>   0x82300000  scriptaddr
>   0x82400000  pxefile_addr_r
>   0x82500000  ramdisk_addr_r
> 
> Also reduce CONFIG_STACK_SIZE to 1MB. LMB reserves CONFIG_STACK_SIZE
> below the relocated stack pointer, and the default 16MB left only about
> 1.4MB between ramdisk_addr_r and the reserved region. With 1MB, about
> 16MB are available for an initrd.
> 
> This series depends on Zhuxu Ran's "riscv: sophgo: Use upstream
> devicetrees for CV18xx boards" (v5), which sets CONFIG_DEFAULT_DEVICE_TREE
> to sophgo/<board>, so that fdtfile matches the Linux devicetree install
> path (sophgo/cv1800b-milkv-duo.dtb and sophgo/sg2002-milkv-duo256m.dtb).
> 
> Link: https://lore.kernel.org/all/20260927-milkv-duo-upstream-dts-v5-0-7f64983e59e1@zohomail.com/
> 
> Tested on Milk-V Duo, booting Linux through "bootflow scan" and an
> extlinux.conf on the SD card.
> 
> Signed-off-by: Hiago De Franco <hfranco@baylibre.com>

just a ping about this patch, I do not know if it was picked
yet or If I should wait and rebase on v2027.01-rc1. Can you help please?

> ---
> Changes in v2:
> - Set CONFIG_BOOTMETH_EFI_BOOTMGR to y, as the default value.
> - Updated the commit description of patch 2.
> - Collected Yao Zi reviewed-by tags. 
> - Link to v1: https://patch.msgid.link/20260929-milkv-duo-bootstd-v1-0-1b75c9ad6483@baylibre.com
> 
> To: u-boot@lists.u-boot-project.org
> Cc: Kongyang Liu <seashell11234455@gmail.com>
> Cc: Tom Rini <trini@konsulko.com>
> Cc: Hiago De Franco <hfranco@baylibre.com>
> Cc: Yao Zi <me@ziyao.cc>
> 
> ---
> Hiago De Franco (3):
>       board: sophgo: milkv_duo: add environment for standard boot
>       configs: milkv_duo: enable BOOTSTD_DEFAULTS
>       configs: milkv_duo: reduce CONFIG_STACK_SIZE to 1MB
> 
>  board/sophgo/milkv_duo/milkv_duo.env |  8 ++++++++
>  configs/milkv_duo_defconfig          | 12 +++++-------
>  2 files changed, 13 insertions(+), 7 deletions(-)
> ---
> base-commit: f8eb3469e1a17c79b047b3fd38ae820e8816a115
> change-id: 20260929-milkv-duo-bootstd-14de5e4e03ef
> prerequisite-change-id: 20260702-milkv-duo-upstream-dts-b54aed41fc61:v5
> prerequisite-patch-id: b8e6815314b7881a02de0066232864d522c4a26c
> prerequisite-patch-id: 0df1fa5db1b2bff402b429809796bad99a517483
> prerequisite-patch-id: 49e1e8263cf0a5ba8d63c8b598b6382cde5284b2
> prerequisite-patch-id: 86dd30e784f022f0a7bb6fbf125c9699467176d4
> prerequisite-patch-id: 49070c05ecf58331ec519a57d1b82f8b2b835a89
> prerequisite-patch-id: 6b6881e45cc6de6544aaa4509db21611158f4fa1
> prerequisite-patch-id: 7198127d4602eeb14212087ce9bb694d84e71a4c
> prerequisite-patch-id: 3a58bd8a061707ff27b8538d4897def3b595dc36
> prerequisite-patch-id: 9055ea941b73e35d1e825787d7eca14ffceb8e8b
> prerequisite-patch-id: 554c1487e8d596e0099677ca88eee0021b1ffbae
> 
> Best regards,
> --  
> Hiago
> 

Thanks!
-- 
Hiago