From: "利平 张" <cmoszhang@yahoo.com.cn>
To: linuxppc-embedded@ozlabs.org
Subject: i have a question about:ppc pci and frame_buffer
Date: Thu, 26 Jul 2007 15:58:04 +0800 (CST) [thread overview]
Message-ID: <749612.18053.qm@web15210.mail.cnb.yahoo.com> (raw)
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now i have a question:
i know ppc is big_endian and pci bus is little_endian.i made a graphics pci card use big_endian.
when i use graphics card to show QT 's picture through VGA ,the color is not what i wanted, it's inversed ,others are in right position.
here below is what i want :
#################################################
0..................7 8............15 16..............24 25.................31
B G R TRANS
now it is this:
#################################################
0..................7 8............15 16..............24 25.................31
TRANS R G B
#################################################
through mmap, the ppc display the screen color through direct pci bus control ,how can i change it??
change kernel?? (i don't know where to change)
or change others??
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next reply other threads:[~2007-07-26 8:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-26 7:58 利平 张 [this message]
2007-07-26 9:11 ` I have a question about:ppc pci and frame_buffer Erik Christiansen
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