[Bug 70721] yoga 2 pro: pentile matrix display color rendering distorted

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=70721

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
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                 CC|                            |chris at chris-wilson.co.uk

--- Comment #2 from Chris Wilson <chris at chris-wilson.co.uk> ---
The biggest issue with the pentile arrangement is that it breaks the assumption
of subpixel layout used for rendering glyphs and the ilk. Make sure you disable
full-hinting and subpixel rendering of fonts (in freetype all you want is
grayscale filtering).

The rest of the colour balance should be solvable (at least improved) with the
right gamma curves - but if it was that easy they would have already tuned
their hw to mimic the typical response of an RGB panel. So it probably
something in the way the interpret the RGB value to generate the W (and
possibly the W having a hue of its own) that causes the accuracy to drift. At
any rate the generic solution of using a colorimeter and colord to generate a
3D matrix to reduce color errors for every RGB value is still likely to work.

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