[Bug 796516] kms: add support for kms atomic api

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796516

Randy Li (ayaka) <ayaka at soulik.info> changed:

           What    |Removed                     |Added
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 Attachment #372577|reviewed                    |none
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 Attachment #372577|0                           |1
        is obsolete|                            |

--- Comment #4 from Randy Li (ayaka) <ayaka at soulik.info> ---
Created attachment 372604
  --> https://bugzilla.gnome.org/attachment.cgi?id=372604&action=edit
Move can sacle checking to a early place

I check the kmscube to do drm modeset, it is very complex, and it must be
merged into show frame stage, I wonder whether it is necessary to use the new
atomic api or legacy api would work.
The other important basic feature is the frame sync, the current commit flag
doesn't bring any benefit than before. Also I have no idea how does the page
flip on the atomic. The vblank may be implicit at atomic api, I remember I read
that in a document.
Both ARM Mali on Linux(Android does) and the drm driver of the rockchip doesn't
support page flip, I may need to update the drm driver first or I can't verify
it.

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