[Intel-gfx] [PATCH 10/12] drm: Don't allow multiple buffers fb with stereo modes

Damien Lespiau damien.lespiau at intel.com
Tue Sep 17 06:20:41 PDT 2013

On Tue, Sep 17, 2013 at 12:37:48PM +0200, Daniel Vetter wrote:
> I guess we should start to check that. For 3d framebuffers with 2
> separate buffer handles for each plane I think we need to add another flag
> to addfb2, e.g.
> #define DRM_MODE_FB_3D_2_FRAMES (1<<1) /* separate left/right buffers, doubles plane count */
> and then also throw in the respective check code into the core that
> userspace supplies sufficient amounts of buffers in framebuffer_check()
> by adjusting drM_format_num_planes and drm_format_plane_cpp.

Would we really need that flag? we can just count the number of buffers
and decide from that number whether we're in the 1 or 2 buffer(s) case?


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