Hi,
    I am new to X development.

I need to develop a kernel module/device driver for a new graphics controller, 
so would like
to understand how X communicates to the HW. It seems that there are many 
interfaces..
MMIO/PIO, frame buffers, DRI/DRM etc.

Is there any document that describes how X interacts with interface driver for 
a video controller?

Regards,
Bagula




      
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