Modify L3CNTLREG register value failed in i915 driver(in Linux kernel version 4.2).
Submitted by william
Assigned to Ian Romanick
I try to change the L3CNTLREG register value in GPU driver on linux4.2, but it doesn't work correctly. I want to change its value 0x60000060 to 0x80000040 for enlarging the L3 cache and shrinking the URB space. When I write(I915_WRITE) the value 0x80000040 to this register, then read(I915_READ), but the value still is 0x60000060.