• Jesse Barnes's avatar
    drm/i915: add SNB and IVB video sprite support v6 · b840d907
    Jesse Barnes authored
    The video sprites support various video surface formats natively and can
    handle scaling as well.  So add support for them using the new DRM core
    sprite support functions.
    
    v2: use drm specific fourcc header and defines
    v3: address Daniel's comments:
      - don't take struct mutex around register access (only needed for
        regs in the GT power well)
      - don't hold struct mutex across vblank waits
      - fix up update_plane API (pass obj instead of GTT offset)
      - add interlaced defines for sprite regs
      - drop unnecessary 'reg' variables
      - comment double buffered reg flushing
      Also fix w/h confusion when writing the scaling reg.
    v4: more fixes, address more comments from Daniel, and include Hai's fix
      - prevent divide by zero in scaling calculation (Hai Lan)
      - update to Ville's new DRM_FORMAT_* types
      - fix sprite watermark handling (calc based on CRTC size, separate
        from normal display wm)
      - remove private refcounts now that the fb cleanups handles things
    v5: add linear surface support
    v6: remove color key clearing & setting from update_plane
    
    For this version, I tested DPMS since it came up in the last review;
    DPMS off/on works ok when a video player is working under X, but for
    power saving we'll probably want to do something smarter.  I'll leave
    that for a separate patch on top.  Likewise with the refcounting/fb
    layer handling, which are really separate cleanups.
    Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
    Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
    Signed-off-by: default avatarKeith Packard <keithp@keithp.com>
    b840d907
i915_reg.h 132 KB