[PATCH v3 2/2] pxe: Get default selection from board type if label matches

[Simon Glass]

Hi Schrempf,

On Thu, 6 Feb 2020 at 02:09, Schrempf Frieder
<frieder.schrempf at kontron.de> wrote:
>
> From: Frieder Schrempf <frieder.schrempf at kontron.de>
>
> In order to auto-select an option from the pxe boot menu, that
> matches the detected board, we check the board model string in the
> devicetree and set the default menu selection, if it matches the
> label of the menu entry and there is no default selection already
> set.
>
> This is useful in combination with SPL that loads a FIT image with
> U-Boot and multiple DTBs. SPL can detect the board and choose the
> matching configuration in the FIT by using
> board_fit_config_name_match().
>
> Signed-off-by: Frieder Schrempf <frieder.schrempf at kontron.de>
> ---
> Changes in v3:
> * Get rid of #ifdef by using IS_ENABLED() in else branch.
>
> Changes in v2:
> * Don't use internal structs of menu, but instead call
>   menu_set_default_by_item_data_match() that does the iteration work.
> ---
>  cmd/pxe_utils.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 46 insertions(+)
>
> diff --git a/cmd/pxe_utils.c b/cmd/pxe_utils.c
> index 53af04d7dc..253df468af 100644
> --- a/cmd/pxe_utils.c
> +++ b/cmd/pxe_utils.c
> @@ -1220,6 +1220,46 @@ struct pxe_menu *parse_pxefile(cmd_tbl_t *cmdtp, unsigned long menucfg)
>         return cfg;
>  }
>
> +#ifdef CONFIG_OF_CONTROL

I think you need to remove this #ifdef, otherwise you'll get a build
error on boards without OF_CONTROL enabled.

> +int pxe_match_menu_label_with_str(void *data, void *str)
> +{
> +       struct pxe_label *label;
> +
> +       if (!data || !str)
> +               return 0;
> +
> +       label = (struct pxe_label *)data;
> +
> +       if (strcmp(label->name, str) == 0)
> +               return 1;
> +
> +       return 0;
> +}
> +
> +int pxe_runtime_select_menu_default(struct menu *m)
> +{
> +       DECLARE_GLOBAL_DATA_PTR;
> +       const char *model;
> +       char *key;
> +       int ret;
> +
> +       model = fdt_getprop(gd->fdt_blob, 0, "model", NULL);
> +
> +       if (!model)
> +               return 0;
> +
> +       ret = menu_set_default_by_item_data_match(m,
> +                       pxe_match_menu_label_with_str, (void *)model, &key);
> +       if (ret)
> +               return ret;
> +
> +       printf("Menu entry %s fits detected board. " \
> +              "Use as default selection...\n", key);
> +
> +       return 0;
> +}
> +#endif
> +
>  /*
>   * Converts a pxe_menu struct into a menu struct for use with U-Boot's generic
>   * menu code.
> @@ -1258,6 +1298,8 @@ static struct menu *pxe_menu_to_menu(struct pxe_menu *cfg)
>         /*
>          * After we've created items for each label in the menu, set the
>          * menu's default label if one was specified.
> +        * If OF_CONTROL is enabled and we don't have a default specified,
> +        * we try to use an entry that matches the board/model name as default.
>          */
>         if (default_num) {
>                 err = menu_default_set(m, default_num);
> @@ -1269,6 +1311,10 @@ static struct menu *pxe_menu_to_menu(struct pxe_menu *cfg)
>
>                         printf("Missing default: %s\n", cfg->default_label);
>                 }
> +       } else if (IS_ENABLED(CONFIG_OF_CONTROL) &&
> +                  pxe_runtime_select_menu_default(m)) {
> +               menu_destroy(m);
> +               return NULL;
>         }
>
>         return m;
> --
> 2.17.1

Regards,
Simon