Hi Thomas and Jocelyn, What we do in ast_dp_set_on_off() is a handshake between host driver and bmc-fw to confirm the operation, on/off, is completed. We use some scratch registers in bmc to handshake with host. This handshake only work if BMC's scu-lock is opened. If scu-lock is opened too late, then it could lead to this issue. Best regards Jammy Thomas Zimmermann <tzimmermann@xxxxxxx> 於 2024年3月28日 週四 上午4:28寫道： > > Hi > > Am 27.03.24 um 09:53 schrieb Jocelyn Falempe: > > Hi, > > > > Thanks for your patch. > > I'm wondering how you can trigger this infinite loop ? > > Yeah, a bit more context for this bug would be welcome. It's hard to > judge the fix without. > > Best regards > Thomas > > > > > Also this looks like a simple fix, that can be easily backported, so > > I'm adding stable in Cc. > > > > If Thomas has no objections, I can push it to drm-misc-fixes. > > > > Reviewed-by: Jocelyn Falempe <jfalempe@xxxxxxxxxx> > > > > > > -- > -- > Thomas Zimmermann > Graphics Driver Developer > SUSE Software Solutions Germany GmbH > Frankenstrasse 146, 90461 Nuernberg, Germany > GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman > HRB 36809 (AG Nuernberg) >
