Comment 139 for bug 1838373

(In reply to Microtech from comment #134)
> Created attachment 144392 [details]
> DSN
>
> (In reply to Stanislav Lisovskiy from comment #132)
> > Miroslaw, do you happen to have any other documents for Microtech Etab?
> > Would be nice to see the actual schematics..
>
> Hi Stanislav, in attached you can find all the docs showing connections
> between PCBA and all the rest. I hope you can find a solution quickly,
> because this is the last issue we have to solve before to make available the
> Linux systems on the e-tab Pro.
> Please let us know.

I checked the schematics - pins look correct(i.e GPIO 135 is reset, GPIO 144 power and GPIO 145 is backlight). I guess we might be missing something in vbt and/or during port initilization stage. Do you have any documents containing more precise panel initialization sequence? I mean exact sequence of command which is expected by this panel, for example exact DCS commands need to be sent for example.
The pdf attached by Miroslaw has power-on, power-off sequence which matches what we doing already, however there is no dcs command description.
I also checked Windows driver - MIPI DSI initilization looks roughly the same, however as I'm not familiar with that codebase which is quite big, it might take a lot of time to figure out some minor differences. I would say the best way to go would be to get exact example initilization sequence from panel vendor and then compare everything what we send to that.