From: Andrey V. <av...@va...> - 2005-08-17 14:52:40
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Clemens Koller wrote: > Hi Geert, Andrey and friends... > > I am working on ppc, MPC8540, SM501 on PCI, > drivers=voyagerfb-0.2.tar.gz from last post. > on linux-2.6 > > Geert wrote: > >> Sorry, I cannot follow. >> >> 1. If it's a palette issue, your setcolreg() routine doesn't fill in >> correctly >> the pseudo palette, >> 2. If it's a RGB565 vs. BGR565 issue, you don't fill in correctly the >> offsets >> in the color bitfields in fb_var_screeninfo, >> 3. If it's an endian issue, it's RRRRRGGGGGGBBBBB vs.GGBBBBBRRRRGGGG, >> right? >> And then there's no much we can do... > > > It looks for me like 3. = bytes are flipped = an endian issue: > In 32 (RGBAlpha) mode (the one we want to use) the colors appear > wrong. I get my /dev/fb0 appear as > BB GG RR aa BB GG RR aa BB GG RR aa ... > > In the > great You're forget qutation here :) SM501 Databook Version 1.02, Page 2-39, it says: > Configuration 2, Endian Control at MMIO_base+0x00005c: > write 0x00000000 for little endian or > write 0xffffffff for big endian > into this register before touching any other register of the sm501. > I've tried that, but it didn't change anything on my system. :-( > (Well, we can flip the DAC outputs in our hw design ;-) As I understand, but I'm not sure, LE/BE controlled only by some GPIO pin (GPIO4 was on rev A/B). I try write to this reg too, with same result. > > Best greets, > > Clemens > _______________________________ > R&D Imaging Devices > Anagramm GmbH > Rupert-Mayer-Str. 45/1 > 81379 Muenchen > Germany > > http://www.anagramm.de > Phone: +49-89-741518-50 > Fax: +49-89-741518-19 > > ------------------------------------------------ > details: > > $ cp red /dev/fb0 gives me a some red color... > $ bvi red > 00000000 00 00 FF 00 00 00 FF 00 00 00 FF 00 00 00 FF 00 ................ > 00000010 00 00 FF 00 00 00 FF 00 00 00 FF 00 00 00 FF 00 ................ > 00000020 00 00 FF 00 00 00 FF 00 00 00 FF 00 00 00 FF 00 ................ > ... > $ cp green /dev/fb0 gives me a some green color... > 00 FF 00 00 00 FF 00 00 00 FF 00 00 00 FF 00 00 > ... > $ cp blue /dev/fb0 > well... blue > FF 00 00 00 FF 00 00 00 FF 00 00 00 FF 00 00 00 > -- Regards Andrey Volkov |