AW: drm/panel: panel-simple power-off sequencing

2023-11-07 Thread Jonas Mark (BT-FS/ENG1-GRB)
Hi Doug, > > I guess, in summary, I'm hoping you'll look again and find that this > > really is a backlight enable. If not, I'd probably advocate for a > > per-panel boolean. > > Circling back, I'm curious what ended up happening here. Did you > decide that it actually was a backlight enable GPIO

Re: drm/panel: panel-simple power-off sequencing

2023-10-27 Thread Jonas Mark (BT-FS/ENG1-GRB)
Hi Doug, Many thanks for your reply. > Hi, > > On Thu, Oct 26, 2023 at 7:37 AM Jonas Mark (BT-FS/ENG1-GRB) > wrote: > > > > Hi, > > > > We have a parallel LCD panel which is driven by panel/panel-simple. > The power-off sequence specified in the datashe

drm/panel: panel-simple power-off sequencing

2023-10-26 Thread Jonas Mark (BT-FS/ENG1-GRB)
Hi, We have a parallel LCD panel which is driven by panel/panel-simple. The power-off sequence specified in the datasheet requires that the enable-gpio must be deasserted for a number of VSYNC cycles before shutting down all other control signals. See the diagram below: