Re: [PATCH 2/4] board: ti: am62px: env: include environment for DFU Boot

[Mattijs Korpershoek <mkorpershoek@baylibre.com>]

Hi Siddharth,

Thank you for the patch.

On mar., déc. 17, 2024 at 18:46, Siddharth Vadapalli <s-vadapalli@ti.com> wrote:

> Include the TI K3 DFU environment to support DFU Boot and DFU Flash.
> Also add "usb" to the list of "boot_targets".
>
> Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
> ---
>  board/ti/am62px/am62px.env | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/board/ti/am62px/am62px.env b/board/ti/am62px/am62px.env
> index 7ef54079aa8..e0838196e3a 100644
> --- a/board/ti/am62px/am62px.env
> +++ b/board/ti/am62px/am62px.env
> @@ -1,5 +1,6 @@
>  #include <env/ti/ti_common.env>
>  #include <env/ti/mmc.env>
> +#include <env/ti/k3_dfu.env>
>
>  name_kern=Image
>  console=ttyS2,115200n8
> @@ -7,7 +8,7 @@ args_all=setenv optargs ${optargs} earlycon=ns16550a,mmio32,0x02800000
>  	${mtdparts}
>  run_kern=booti ${loadaddr} ${rd_spec} ${fdtaddr}
>
> -boot_targets=mmc1 mmc0 pxe dhcp
> +boot_targets=mmc1 mmc0 usb pxe dhcp
>  boot=mmc
>  mmcdev=1
>  bootpart=1:2
> @@ -17,4 +18,4 @@ rd_spec=-
>  #if CONFIG_BOOTMETH_ANDROID
>  #include <env/ti/android.env>
>  adtb_idx=3
> -#endif
> \ No newline at end of file
> +#endif

This change seems un-related, is it needed?

Also, looking at Martyn's/Sjoerd's series, I see a couple of things
missing:
1. Documentation. now that am62px is compatible with the
   am62x_r5_usbdfu.config fragment, we need to document this in the board
   docs. See: commit def64b493748 ("doc: board: Add document for DFU boot on am62x SoCs")

2. Including configs/am62x_a53_usbdfu.config in configs/am62px_evm_a53_defconfig.
   This is how it's done for am62x, see:
   commit dfc2dff5a844 ("configs: am62x_evm_*: Enable USB and DFU support")

Note that If we don't do 2), we cannot use USB gadget from a U-Boot that
has been booted over DFU:

    => fastboot usb 0
    No USB device found
    USB init failed: -19
    => usb list
    USB is stopped. Please issue 'usb start' first.
    => usb start
    starting USB...
    No USB controllers found
    =>

For 2, this diff fixes it:

diff --git a/configs/am62px_evm_a53_defconfig b/configs/am62px_evm_a53_defconfig
index 9635beb1b27e..81f433c997b5 100644
--- a/configs/am62px_evm_a53_defconfig
+++ b/configs/am62px_evm_a53_defconfig
@@ -183,3 +183,4 @@ CONFIG_FS_FAT_MAX_CLUSTSIZE=16384
 CONFIG_EFI_SET_TIME=y
 
 #include <configs/k3_efi_capsule.config>
+#include <configs/am62x_a53_usbdfu.config>

In my opinion, 2) is a valid use case:
1. On a blank board, we boot the bootloaders over DFU
2. Once U-Boot is started, we start fastboot to flash all images to eMMC.

Could this be added for v2, please?

Thanks,
Mattijs

> --
> 2.43.0