tree ade110f4c117f8c16d952640073e1f2984ccceb8
parent 03be70050c85768e9ce7c0d0887110d1b629e127
author Daniel Kurtz <djkurtz@chromium.org> 1421045903 +0800
committer Mark Yao <mark.yao@rock-chips.com> 1426471632 +0800

drm/rockchip: Only alloc a kmap for fbdev gem object

In general, the data in drm/rockchip GEM objects is never accessed by
the kernel.  The objects are either accessed by a GPU, by display
controller DMA, or by mmap'ing them to user space.  Thus, these
buffers need not be mapped into kernel address space.

The only exception is the fbdev framebuffer(s), which may be written
in-kernel by fbcon.

Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>