drm/i915: Add cherryview_update_wm()
drm/i915: Add cherryview_update_wm()

CHV has a third pipe so we need to compute the watermarks for its
planes. Add cherryview_update_wm() to do just that.

v2: Rebase on top of Imre's cxsr changes
v3: Pass crtc to vlv_update_drain_latency()

Reviewed-by: Paulo Zanoni <cc0e04a2103c45cd195651d976f79813d0f66bdf@intel.com>
Signed-off-by: Ville Syrjälä <cd6e8d405ca90be3a03d5427c5b24fbd2d68dcc4@linux.intel.com>
Signed-off-by: Daniel Vetter <c1b6782c4af8f0673da8923a0702a1832e5940f4@ffwll.ch>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs