Hello Peng,
Am Montag, dem 14.02.2022 um 20:55 +0800 schrieb Peng Fan (OSS):
> From: Peng Fan <peng....@nxp.com>
>
> Beside the fused modules on iMX8MP Lite, this part has also fused
> GPU3D/2D, LVDS and MIPI DSI.
> So we have to disable them for kernel and also disable MIPI DSI
> in u-boot DTS for splash screen at runtime.
>
> Signed-off-by: Ye Li <ye...@nxp.com>
> Signed-off-by: Peng Fan <peng....@nxp.com>
> ---
> arch/arm/mach-imx/imx8m/soc.c | 147
> ++++++++++++++++++++++++++++++++--
> 1 file changed, 142 insertions(+), 5 deletions(-)
>
> diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-
> imx/imx8m/soc.c
> index e2d21bf6b8..91ff7eca59 100644
> --- a/arch/arm/mach-imx/imx8m/soc.c
> +++ b/arch/arm/mach-imx/imx8m/soc.c
> @@ -905,6 +905,90 @@ static int low_drive_gpu_freq(void *blob)
> }
> #endif
>
>
[...]
>
> +#ifdef CONFIG_OF_BOARD_FIXUP
> +#ifndef CONFIG_SPL_BUILD
> +int board_fix_fdt(void *fdt)
I stumbled over this already in the NXP U-Boot. We
implemented there on top our own board_fix_fdt() callback on board
level. So this caused a conflict. This will be a issue for upstream
also when a imx8m* board tries to use it.
Is there not any other way to solve this than implementing board
callbacks on soc level?
Regards,
Teresa
> +{
> + if (is_imx8mpul()) {
> + int i = 0;
> + int nodeoff, ret;
> + const char *status = "disabled";
> + static const char * const dsi_nodes[] = {
> + "/soc@0/bus@32c00000/mipi_dsi@32e60000",
> + "/soc@0/bus@32c00000/lcd-controller@32e80000",
> + "/dsi-host"
> + };
> +
> + for (i = 0; i < ARRAY_SIZE(dsi_nodes); i++) {
> + nodeoff = fdt_path_offset(fdt, dsi_nodes[i]);
> + if (nodeoff > 0) {
> +set_status:
> + ret = fdt_setprop(fdt, nodeoff,
> "status", status,
> + strlen(status) + 1);
> + if (ret == -FDT_ERR_NOSPACE) {
> + ret = fdt_increase_size(fdt,
> 512);
> + if (!ret)
> + goto set_status;
> + }
> + }
> + }
> + }
> +
> + return 0;
> +}
> +#endif
> +#endif
> +
> #if !CONFIG_IS_ENABLED(SYSRESET)
> void reset_cpu(void)
> {
--
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