[PATCH v2 2/6] rockchip: Use an external TPL binary on RK3568

[Kever Yang]

On 2023/2/14 18:33, Jonas Karlman wrote:
> Rockchip SoCs typically use U-Boot TPL to initialize DRAM, then jumps
> back to BootRom to load next stage, U-Boot SPL, into DRAM. BootRom then
> jumps to U-Boot SPL to continue the normal boot flow.
>
> However, there is no support to initialize DRAM on RK35xx SoCs using
> U-Boot TPL and instead an external TPL binary must be used to generate a
> bootable u-boot-rockchip.bin image.
>
> Add CONFIG_ROCKCHIP_EXTERNAL_TPL to indicate that an external TPL should
> be used. Build U-Boot with ROCKCHIP_TPL=/path/to/ddr.bin to generate a
> bootable u-boot-rockchip.bin image for RK3568.
>
> Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
Reviewed-by: Kever Yang <kever.yang at rock-chips.com>

Thanks,
- Kever
> ---
> v2:
> - rename external-tpl-path to rockchip-tpl-path
> - rename EXTERNAL_TPL to ROCKCHIP_TPL
> - add CONFIG_ROCKCHIP_EXTERNAL_TPL option
>
>   Makefile                          |  1 +
>   arch/arm/dts/rockchip-u-boot.dtsi | 10 ++++++++--
>   arch/arm/mach-rockchip/Kconfig    |  4 ++++
>   3 files changed, 13 insertions(+), 2 deletions(-)
>
> diff --git a/Makefile b/Makefile
> index 54f894dab841..58f8c7a35335 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -1335,6 +1335,7 @@ cmd_binman = $(srctree)/tools/binman/binman $(if $(BINMAN_DEBUG),-D) \
>   		-a opensbi-path=${OPENSBI} \
>   		-a default-dt=$(default_dt) \
>   		-a scp-path=$(SCP) \
> +		-a rockchip-tpl-path=$(ROCKCHIP_TPL) \
>   		-a spl-bss-pad=$(if $(CONFIG_SPL_SEPARATE_BSS),,1) \
>   		-a tpl-bss-pad=$(if $(CONFIG_TPL_SEPARATE_BSS),,1) \
>   		-a spl-dtb=$(CONFIG_SPL_OF_REAL) \
> diff --git a/arch/arm/dts/rockchip-u-boot.dtsi b/arch/arm/dts/rockchip-u-boot.dtsi
> index 6c662a72d4f9..2878b80926c4 100644
> --- a/arch/arm/dts/rockchip-u-boot.dtsi
> +++ b/arch/arm/dts/rockchip-u-boot.dtsi
> @@ -20,9 +20,12 @@
>   		mkimage {
>   			filename = "idbloader.img";
>   			args = "-n", CONFIG_SYS_SOC, "-T", "rksd";
> -#ifdef CONFIG_TPL
>   			multiple-data-files;
>   
> +#ifdef CONFIG_ROCKCHIP_EXTERNAL_TPL
> +			rockchip-tpl {
> +			};
> +#elif defined(CONFIG_TPL)
>   			u-boot-tpl {
>   			};
>   #endif
> @@ -134,9 +137,12 @@
>   		mkimage {
>   			filename = "idbloader-spi.img";
>   			args = "-n", CONFIG_SYS_SOC, "-T", "rkspi";
> -#ifdef CONFIG_TPL
>   			multiple-data-files;
>   
> +#ifdef CONFIG_ROCKCHIP_EXTERNAL_TPL
> +			rockchip-tpl {
> +			};
> +#elif defined(CONFIG_TPL)
>   			u-boot-tpl {
>   			};
>   #endif
> diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig
> index b678ec41318e..4a5415403446 100644
> --- a/arch/arm/mach-rockchip/Kconfig
> +++ b/arch/arm/mach-rockchip/Kconfig
> @@ -377,6 +377,10 @@ config TPL_ROCKCHIP_BACK_TO_BROM
>             SPL will return to the boot rom, which will then load the U-Boot
>             binary to keep going on.
>   
> +config ROCKCHIP_EXTERNAL_TPL
> +	bool "Use external TPL binary"
> +	default y if ROCKCHIP_RK3568
> +
>   config ROCKCHIP_COMMON_BOARD
>   	bool "Rockchip common board file"
>   	help