[PATCH v4 5/8] video: Skip framebuffer reservation if already reserved

[Simon Glass]

On Sat, 25 Nov 2023 at 09:27, Devarsh Thakkar <devarsht at ti.com> wrote:
>
> Skip framebufer reservation if it was already reserved from previous
> stage and whose information was passed using a bloblist.
>
> Return error in case framebuffer information received from bloblist is
> invalid i.e NULL or empty.
>
> While at it, improve the debug message to make it more clear that
> address in discussion is of framebuffer and not bloblist and also match
> it with printing scheme followed in video_reserve function.
>
> Signed-off-by: Devarsh Thakkar <devarsht at ti.com>
> ---
> V2:
> - Add debug prints
> - Fix commenting style
> V3:
> - Fix commenting style
> V4:
> - Remove extra checks on gd for video data in video_reserve
> - Add check and return error if video handoff provided info is invalid
> - Improve debug message
> - Remove Reviewed-by due to additional changes per review comments
> ---
>  common/board_f.c             |  8 ++++++--
>  drivers/video/video-uclass.c | 10 ++++++++--
>  2 files changed, 14 insertions(+), 4 deletions(-)

Reviewed-by: Simon Glass <sjg at chromium.org>

with nit below

>
> diff --git a/common/board_f.c b/common/board_f.c
> index acf802c9cb..442b8349d0 100644
> --- a/common/board_f.c
> +++ b/common/board_f.c
> @@ -407,11 +407,15 @@ static int reserve_video_from_videoblob(void)
>  {
>         if (IS_ENABLED(CONFIG_SPL_VIDEO_HANDOFF) && spl_phase() > PHASE_SPL) {

This is board_f.c so the SPL phase will always be PHASE_BOARD_F so can
you please drop that second condition? It will confuse people.

>                 struct video_handoff *ho;
> +               int ret = 0;
>
>                 ho = bloblist_find(BLOBLISTT_U_BOOT_VIDEO, sizeof(*ho));
>                 if (!ho)
> -                       return log_msg_ret("blf", -ENOENT);
> -               video_reserve_from_bloblist(ho);
> +                       return log_msg_ret("Missing video bloblist", -ENOENT);
> +
> +               ret = video_reserve_from_bloblist(ho);
> +               if (ret)
> +                       return log_msg_ret("Invalid Video handoff info", ret);
>
>                 /* Sanity check fb from blob is before current relocaddr */
>                 if (likely(gd->relocaddr > (unsigned long)ho->fb))

[..]

Regards,
Simon