[PATCH v2 2/2] arch: imx8qxp: Override weak fb_mmc_get_boot_offset function

[Mattijs Korpershoek]

Hi Heiko,

On Tue, Feb 10, 2026 at 06:43, Heiko Schocher <hs at nabladev.com> wrote:

> From: Adrian Freihofer <adrian.freihofer at siemens.com>
>
> Add IMX8QXP SoCs specific implementation of fb_mmc_get_boot_offset()
>
> This is needed as bootloader offset is different dependent on SoC
> revision!
>
> For revision B0 the bootloader starts at 32k offset. On offset
> 0x0 the bootloaders environment is stored.
>
> On C0 revisions of the SoC bootloader image starts at offset 0x0
>
> Signed-off-by: Adrian Freihofer <adrian.freihofer at siemens.com>
> Signed-off-by: Heiko Schocher <hs at nabladev.com>
> Reviewed-by: Mattijs Korpershoek <mkorpershoek at kernel.org>

Peng did provide some review feedback here:
https://lore.kernel.org/all/aXbHDnU+SpgnEt+Q@shlinux89/

I have not seen a response to that. Could you please respond there why
you did not apply his suggestion?

>
> ---
>
> Changes in v2:
> - added Reviewed-by from Mattijs
>
>  arch/arm/mach-imx/imx8/cpu.c | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
>
> diff --git a/arch/arm/mach-imx/imx8/cpu.c b/arch/arm/mach-imx/imx8/cpu.c
> index 0e112af661c..27c431881b0 100644
> --- a/arch/arm/mach-imx/imx8/cpu.c
> +++ b/arch/arm/mach-imx/imx8/cpu.c
> @@ -899,3 +899,24 @@ bool m4_parts_booted(void)
>  
>  	return false;
>  }
> +
> +#ifdef CONFIG_IMX8QXP
> +#include <blk.h>
> +
> +/*
> + * On B0 revision SoCs the bootloader is on 32k offset
> + * and at offset 0x0 is the U-Boot Environment stored
> + *
> + * So we cannot flash bootloader images to offset 0x0
> + *
> + * On C0 revisions of the SoC bootloader image starts
> + * at offset 0x0 ...
> + */
> +lbaint_t fb_mmc_get_boot_offset(void)
> +{
> +	if ((get_cpu_rev() & 0xF) == CHIP_REV_C)
> +		return 0;
> +
> +	return 0x40;
> +}
> +#endif
> -- 
> 2.20.1