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

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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>
This commit is contained in:
Daniel Kurtz
2015-01-12 14:58:23 +08:00
committed by Mark Yao
parent 03be70050c
commit f76c83b580
3 changed files with 15 additions and 7 deletions
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2
drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c
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@@ -71,7 +71,7 @@ static int rockchip_drm_fbdev_create(struct drm_fb_helper *helper,
size = mode_cmd.pitches[0] * mode_cmd.height;
rk_obj = rockchip_gem_create_object(dev, size);
rk_obj = rockchip_gem_create_object(dev, size, true);
if (IS_ERR(rk_obj))
return -ENOMEM;