On 2015å¹´04æ19æ¥ 00:55, Heiko Stübner wrote: > Am Donnerstag, 16. April 2015, 16:41:51 schrieb Ãrjan Eide: >> Set vm_pgoff to 0 after using it to look up the GEM node, before passing >> it on rockchip_gem_mmap_buf() where the offset must be from the start of >> the buffer. >> >> Passing in the fake offset currently works because the >> dma_mmap_attrs implementation that is used for this device, >> arm_iommu_mmap_attrs, ignores the offset completely. >> >> Signed-off-by: Ãrjan Eide <orjan.eide at arm.com> > both patches on a rk3288-veyron-pinky > > Tested-by: Heiko Stuebner <heiko at sntech.de> > > Through which tree do you want to take these patches? I guess the rockchip-drm > related patch should go through the tree that will take the dma-mapping patch, > so you'll probably need an "Ack" from Mark Yao (Cc'ed). > > > Heiko > >> --- >> drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 5 +++++ >> 1 file changed, 5 insertions(+) >> >> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c >> b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c index 7ca8799e..69f01c3 >> 100644 >> --- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c >> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c >> @@ -94,6 +94,11 @@ int rockchip_gem_mmap(struct file *filp, struct >> vm_area_struct *vma) return -EACCES; >> } >> >> + /* Set vm_pgoff (used as a fake buffer offset by DRM) to 0 and map the >> + * whole buffer from the start. >> + */ >> + vma->vm_pgoff = 0; >> + >> obj = container_of(node, struct drm_gem_object, vma_node); >> ret = rockchip_gem_mmap_buf(obj, vma); > > > Thanks for this fix, Acked-by: Mark Yao <mark.yao at rock-chips.com>
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