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    SubjectRe: [PATCH v4 00/11] Enabling 180 degree rotation for sprite and crtc planes
    On Mon, Feb 10, 2014 at 10:41:30AM +0000, One Thousand Gnomes wrote:
    > On Fri, 7 Feb 2014 19:15:05 +0530
    > sagar.a.kamble@intel.com wrote:
    >
    > > From: Sagar Kamble <sagar.a.kamble@intel.com>
    > >
    > > These patches will enable 180 degree rotation for CRTC and Sprite planes.
    > > Changelog:
    > > 1. drm/i915: Add 180 degree primary plane rotation support
    > > Addressed review comments for CRTC rotation from FBC, page flip, CRTC active/
    > > inactive perspective.
    >
    > Does this mean it should also handle horizontal mirroring in
    > hardware (180° rotate, and scan lines backwards combined) ?

    Our hardware doesn't support mirroring (h or v). Well, unless you
    count h+v mirroring since that's 180 degree rotation :)

    Anyways IIRC the old video overlay (present on gen2-4) was the only plane
    to ever support mirroring on Intel hardware. With all other planes we're
    limited to 0 and 180 degree rotation.

    --
    Ville Syrjälä
    Intel OTC
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