[PATCHv2 3/8] drm/omap: add support for manually updated displays

[Tony Lindgren]

* Sebastian Reichel <sebastian.reichel at collabora.co.uk> [180208 18:31]:
> This adds the required infrastructure for manually
> updated displays, such as DSI command mode panels.
> 
> While those panels often support partial updates
> we currently always do a full refresh. Display
> will be refreshed when something calls the dirty
> callback, such as libdrm's drmModeDirtyFB().
> 
> This is currently being implemented for the kernel
> console and for Xorg. Weston currently does not
> implement this and is known not to work on manually
> updated displays.

Tested-by: Tony Lindgren <tony at atomide.com>