Re: [radeonhd] [PATCH] Somehow /force/ backlight control

Rafa? Mi?ecki writes:

W dniu 30 czerwca 2009 17:32 u?ytkownik Egbert Eich napisa?:

OK, I just tested it and it works actually.

I decided to check out atombios's check about backlight control.

1) In rhd_dig.c we call RhdAtomSetupBacklightControlProperty which returns bl level

2) in rhd_atomout.c: RhdAtomSetupBacklightControlProperty calls RHDAtomBIOSScratchBlLevel

3) in rhd_biosscratch.c: RHDAtomBIOSScratchBlLevel just check 0x18 / 0x172C register.

So is this AtomBIOS based backlight control just using another register? No special AtomBIOS commands?

OK, i went ahead and removed the #ifdef NOT_YET and tested it on both RS690 (LVTMA) and an M82 (DIG). I remember seeing a bug report once who talked about a crash - yet I don't recall the circumstances. Therefore I'm going to commit my changes and wait for another bug report to come in to go back and investigate this issue.

...

No, it is per subvendor/subsys ID, thus exactly what we need.

Didn't know that, thanks.

Your case should be taken care of now. On my M82 neither the hard coded nor the AtomBIOS seems to modify the brightness. Going to dig into the AtomBIOS code. Cheers, Egbert. -- To unsubscribe, e-mail: radeonhd+unsubscribe@opensuse.org For additional commands, e-mail: radeonhd+help@opensuse.org