drm/sun4i: abstract a engine type
As we are going to add support for the Allwinner DE2 engine in sun4i-drm
driver, we will finally have two types of display engines -- the DE1
backend and the DE2 mixer. They both do some display blending and feed
graphics data to TCON, and is part of the "Display Engine" called by
Allwinner, so I choose to call them both "engine" here.
Abstract the engine type to a new struct with an ops struct, which contains
functions that should be called outside the engine-specified code (in
TCON, CRTC or TV Encoder code).
In order to preserve bisectability, we also switch the backend and layer
code in its own module.
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c
index c52f7a9e..35cad9c 100644
--- a/drivers/gpu/drm/sun4i/sun4i_drv.c
+++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
@@ -91,7 +91,7 @@ static int sun4i_drv_bind(struct device *dev)
goto free_drm;
}
drm->dev_private = drv;
- INIT_LIST_HEAD(&drv->backend_list);
+ INIT_LIST_HEAD(&drv->engine_list);
INIT_LIST_HEAD(&drv->tcon_list);
ret = of_reserved_mem_device_init(dev);