Re: [PATCH] drm/atomic: pass old crtc state to atomic_begin/flush.

On Fri, Jun 12, 2015 at 11:18:22AM +0200, Maarten Lankhorst wrote:

In intel it's useful to keep track of some state changes with old crtc state vs new state, for example to disable initial planes or when a modeset's prevented during fastboot.

Signed-off-by: Maarten Lankhorst maarten.lankhorst@linux.intel.com

Hm, thus far the approach has been that the various ->check callbacks diff the state and set appropriate stuff like needs_modeset or planes_changed. And with intel_crtc->atomic we've kinda started to build up similar things for i915. What do you plan to use this for? -Daniel