Re: [PATCH v4 2/2] drm: Add DRM_MODE_ROTATE_ and DRM_MODE_REFLECT_ to UAPI

[Daniel Vetter]

On Mon, May 22, 2017 at 6:09 PM, Ville SyrjÃlÃ
<ville.syrjala@xxxxxxxxxxxxxxx> wrote:
>> +/*
>> + * DRM_MODE_REFLECT_<axis>
>> + *
>> + * Signals that the contents of a drm plane is reflected in the <axis> axis,
>> + * in the same way as mirroring.
>
> That's not what I was after. We're still missing the information about
> the order in which reflection and rotation happens. Also does "in the
> axis" mean the same thing as "along the axis" and not "across the axis"?
> /me thinks the old text was better

There's already a pretty lengthy kernel-doc in drm_blend.c which is
trying to explain all this. Duplicating all these things here is not
all that awesome imo. Can we perhaps instead reference the text in
drm_blend.c and make sure that is the one true source of truth?
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch