I have been rewriting the xf86-video-chips to enable independent monitors. My system is PPC, and on the C&T 69030 you can configure the frame buffer for big endian. What I have discovered is that not only does it swap bytes for the frame buffer, but pci configuration is also byte swapped, and this causes problems that I am working around.
This is an issue when the mouse pointer moves from one chips's screen to the next chip's screen. I have debugged it to the point where the code in xf86pciBus.c - initPciState() has shown me what is going on. When the mouse moves from on screen to the next, the pci configuration is written to - it is disabling the pci config io for one card and enabling the pci config io for the next card. Since this data is now swapped, it kills the chip when configuring the pci data. Since I have two chips on this platform and it is configured for MMIO, there is no need to reconfigure the pci configuration. I am looking for a way to override the pci access, or at least be notified of pending access so that I can set the configuration back to little endian until the access is complete. Any suggestions? Thanks in advance Donald Kayser _______________________________________________ xorg-devel mailing list [email protected] http://lists.x.org/mailman/listinfo/xorg-devel
