On 11/11/2010 12:56 PM, Alan Cox wrote:
On Thu, 11 Nov 2010 16:36:59 +0530
vijay singh<[email protected]> wrote:
Hello,
is their any link or input which can give me Xorg video module driver
for PowerVR chipset (SGX535).
I believe vendors can purchase a proprietary (ie non-free in both senses)
license and access from the device vendor. Otherwise you are pretty much
out of luck.
There is enough info the public domain to probably write an acceptable 2D
driver, maybe even to do a compositing 2D driver by staring hard at the
kernel bits that have been released (because they had to GPL them), but
not enough for 3D.
Alan
One should remember though, that many SGX chips out there don't have a
2D engine, with the one in Poulsbo being a noteable exception. Thus 2D
accel is emulated using the 3D engine. Setting up 3D state is quite
costly on the SGX, and as a result, the X fbdev driver with
write-combining and shadowfb get close to or even beat the SGX on
"normal" 2D operations, including blits and fills.
/Thomas
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