video: Add a note about the broken implementation

The cls command is broken. Previous discussion about this was at [1] and
[2]. For now, add a note to the source code.

[1] https://patchwork.ozlabs.org/project/uboot/patch/
       20221022092058.106052-1-heinrich.schuchardt@canonical.com/
[2] https://patchwork.ozlabs.org/project/uboot/patch/
       20230106145243.411626-12-sjg@chromium.org/

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2023-03-10 12:47:23 -08:00 committed by Heinrich Schuchardt
parent b7adb69e9a
commit 61a6210541

View file

@ -17,7 +17,13 @@ static int do_video_clear(struct cmd_tbl *cmdtp, int flag, int argc,
{
__maybe_unused struct udevice *dev;
/* Send clear screen and home */
/*
* Send clear screen and home
*
* FIXME(Heinrich Schuchardt <xypron.glpk@gmx.de>): This should go
* through an API and only be written to serial terminals, not video
* displays
*/
printf(CSI "2J" CSI "1;1H");
if (IS_ENABLED(CONFIG_VIDEO_ANSI))
return 0;