lkml.org 
[lkml]   [2015]   [Apr]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/2] drm: rockchip: Don't pass DRM fake offset to dma-api
On 2015年04月19日 00:55, Heiko Stübner wrote:
> Am Donnerstag, 16. April 2015, 16:41:51 schrieb Ørjan 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: Ørjan Eide <orjan.eide@arm.com>
> both patches on a rk3288-veyron-pinky
>
> Tested-by: Heiko Stuebner <heiko@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@rock-chips.com>

--
Mark



\
 
 \ /
  Last update: 2015-04-20 08:01    [W:0.073 / U:11.064 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site