[Letux-kernel] omapdrm: Pandora Blues

H. Nikolaus Schaller hns at goldelico.com
Wed Nov 8 06:36:51 CET 2017


> Am 07.11.2017 um 08:57 schrieb Tomi Valkeinen <tomi.valkeinen at ti.com>:
> 
> On 06/11/17 19:52, H. Nikolaus Schaller wrote:
> 
>> So which one is the "future proof"?
>> 
>> compatible = "toppoly,td028ttec1"
>> 
>> or
>> 
>> compatible = "omapdss,tpo,td043mtea1"
> 
> In the dts, you should never have the omapdss prefix.

Ok, then we have to remove it from Pandora DTS anyways.
So there will be a fix for Pandora and one for GTA04 + td028ttec1.

> 
>> If VDDS_DSI isn't enabled it garbles the panel RGB signals. That would explain a lot.
>> It is still funny why it only affects the Red and Green channel, but that may have
>> to do something with the pad drivers inside the chip. Maybe those for Blue are powered
>> differently...
> 
> Yep, if you look at the datamanual, you'll see the pins which VDDS_DSI
> powers. It doesn't affect all the DPI pins.

Ok! This special feature did help to find the issue... If the screen would have
remained completely black, it would have been more difficult to decide between
bisect bad/skip/good.

BR and thanks,
Nikolaus



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