Messages in this thread |  | | From | Albert Cahalan <> | Subject | Re: SVGA kernel chipset drivers. | Date | Fri, 31 May 1996 13:02:59 -0400 (EDT) |
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From: Alan Cox <alan@cymru.net>
>> I was wondering if there are any plans incorporate any of the major video >> card chipsets into low level kernel driver support. SVGALIB at current >> has a very limited number of chipsets that it supports not to mention I >> would think a low level kernel driver would get better performence out of > > Unlikely. The difference between a library driver running with > video ram mmap()'d (ie direct access) and io port access and a > kernel driver is probably that the kernel driver is slower due > to syscall overhead.
Nope, the kernel can provide a framebuffer device in /dev that programs can mmap. IO port access is less critical.
The real reasons for such a driver are reliability and security.
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