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    SubjectRe: [PATCH 2/6] drm: writeback: Add out-fences for writeback connectors
    On Fri, 25 Nov 2016 16:49:00 +0000
    Brian Starkey <brian.starkey@arm.com> wrote:

    > Add the OUT_FENCE_PTR property to writeback connectors, to enable
    > userspace to get a fence which will signal once the writeback is
    > complete. It is not allowed to request an out-fence without a
    > framebuffer attached to the connector.
    >
    > A timeline is added to drm_writeback_connector for use by the writeback
    > out-fences.
    >
    > In the case of a commit failure or DRM_MODE_ATOMIC_TEST_ONLY, the fence
    > is set to -1.
    >
    > Changes from v2:
    > - Rebase onto Gustavo Padovan's v9 explicit sync series
    > - Change out_fence_ptr type to s32 __user *

    Don't know what happened, but I still see s32 __user * types in this
    patch (I had to patch it to make in work on top of 4.11-rc1).

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