[Bug 29723] [HDMI] No overscan properties

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=29723

--- Comment #12 from Damien Lespiau <damien.lespiau at gmail.com> ---
As far as I know, to support telling the sink to underscan CE modes, you need
to have a video capability data block in the EDID telling you the sink can do
that.

For that you need the latest version of edid-decode with the patches I just
pushed: http://cgit.freedesktop.org/xorg/app/edid-decode

For a samsung TV I have around:

  Extended tag: video capability data block
    YCbCr quantization: No Data (0)
    RGB quantization: No Data (0)
    PT scan behaviour: No Data (0)
    IT scan behaviour: Support both over- and underscan (3)
    CE scan behaviour: Support both over- and underscan (3)

Your 4k TV doesn't have that, so overscans all CE modes. I think we'll need the
panel fitter at that point. Now that's not as easy as it seems, the amount of
overscan is not defined in the spec.

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