[U-Boot] [PATCH] usb: kbd: Don't fail with iomux

[Peter Robinson]

On Wed, Sep 27, 2017 at 2:19 AM, Rob Clark <robdclark at gmail.com> wrote:
> stdin might not be set, which would cause iomux_doenv() to fail
> therefore causing probe_usb_keyboard() to fail.  Furthermore if we do
> have iomux enabled, the sensible thing (in terms of user experience)
> would be to simply add ourselves to the list of stdin devices.
>
> This fixes an issue with usbkbd on dragonboard410c with distro-
> bootcmd, where stdin is not set (so stdinname is null).
>
> Signed-off-by: Rob Clark <robdclark at gmail.com>
Tested-by: Peter Robinson <pbrobinson at gmail.com>

Tested on RPi3 and a couple of other devices.

> ---
> Somehow this patch was dropped on the floor.  I don't remember
> which version # this is up to, search the list if you care.  But
> this is the latest.  I only noticed it was missing because u-boot
> crashes when you boot with usb-keyboard plugged in (at least on
> db410c) without it.  So someone please apply this patch before it
> gets lost again.
>
>  common/usb_kbd.c  | 46 +++++++++++++++++++++++++++++++---------------
>  include/console.h |  2 --
>  2 files changed, 31 insertions(+), 17 deletions(-)
>
> diff --git a/common/usb_kbd.c b/common/usb_kbd.c
> index a323d72a36..4c3ad95fca 100644
> --- a/common/usb_kbd.c
> +++ b/common/usb_kbd.c
> @@ -516,23 +516,39 @@ static int probe_usb_keyboard(struct usb_device *dev)
>                 return error;
>
>         stdinname = env_get("stdin");
> -#if CONFIG_IS_ENABLED(CONSOLE_MUX)
> -       error = iomux_doenv(stdin, stdinname);
> -       if (error)
> -               return error;
> -#else
> -       /* Check if this is the standard input device. */
> -       if (strcmp(stdinname, DEVNAME))
> -               return 1;
> +       if (CONFIG_IS_ENABLED(CONSOLE_MUX)) {
> +               char *devname = DEVNAME;
> +               char *newstdin = NULL;
> +               /*
> +                * stdin might not be set yet.. either way, with console-
> +                * mux the sensible thing to do is add ourselves to the
> +                * list of stdio devices:
> +                */
> +               if (stdinname && !strstr(stdinname, DEVNAME)) {
> +                       newstdin = malloc(strlen(stdinname) +
> +                                       strlen(","DEVNAME) + 1);
> +                       sprintf(newstdin, "%s,"DEVNAME, stdinname);
> +                       stdinname = newstdin;
> +               } else if (!stdinname) {
> +                       stdinname = devname;
> +               }
> +               error = iomux_doenv(stdin, stdinname);
> +               free(newstdin);
> +               if (error)
> +                       return error;
> +       } else {
> +               /* Check if this is the standard input device. */
> +               if (strcmp(stdinname, DEVNAME))
> +                       return 1;
>
> -       /* Reassign the console */
> -       if (overwrite_console())
> -               return 1;
> +               /* Reassign the console */
> +               if (overwrite_console())
> +                       return 1;
>
> -       error = console_assign(stdin, DEVNAME);
> -       if (error)
> -               return error;
> -#endif
> +               error = console_assign(stdin, DEVNAME);
> +               if (error)
> +                       return error;
> +       }
>
>         return 0;
>  }
> diff --git a/include/console.h b/include/console.h
> index cea29ed6dc..7dfd36d7d1 100644
> --- a/include/console.h
> +++ b/include/console.h
> @@ -57,8 +57,6 @@ int console_announce_r(void);
>  /*
>   * CONSOLE multiplexing.
>   */
> -#ifdef CONFIG_CONSOLE_MUX
>  #include <iomux.h>
> -#endif
>
>  #endif
> --
> 2.13.5
>
> _______________________________________________
> U-Boot mailing list
> U-Boot at lists.denx.de
> https://lists.denx.de/listinfo/u-boot