[Intel-gfx] [PATCH v4 01/10] drm/i915: Add .get_hw_state() method for planes

From: Ville Syrjälä Add a .get_hw_state() method for planes, returning true or false depending on whether the plane is enabled. Use it to rewrite the plane enabled/disabled asserts in platform agnostic fashion. We do lose the pre-gen4 plane<->pipe mapping checks,

[Intel-gfx] [PATCH v4 01/10] drm/i915: Add .get_hw_state() method for planes

From: Ville Syrjälä Add a .get_hw_state() method for planes, returning true or false depending on whether the plane is enabled. Use it to rewrite the plane enabled/disabled asserts in platform agnostic fashion. We do lose the pre-gen4 plane<->pipe mapping checks,