media: v4l: vsp1: Rename BRU to BRx

Some VSP instances have two blending units named BRU (Blend/ROP Unit)
and BRS (Blend/ROP Sub unit). The BRS is a smaller version of the BRU
with only two inputs, but otherwise offers similar features and offers
the same register interface. The BRU and BRS can be used exchangeably in
VSP pipelines (provided no more than two inputs are needed).

Due to historical reasons, the VSP1 driver implements support for both
the BRU and BRS through objects named vsp1_bru. The code uses the name
BRU to refer to either the BRU or the BRS, except in a few places where
noted explicitly. This creates confusion.

In an effort to avoid confusion, rename the vsp1_bru object and the
corresponding API to vsp1_brx, and use BRx to refer to blend unit
instances regardless of their type. The names BRU and BRS are retained
where reference to a particular blend unit type is needed, as well as in
hardware registers to stay close to the datasheet.

Signed-off-by: Laurent Pinchart <[email protected]>
Acked-by: Kieran Bingham <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>

drivers/media/platform/vsp1/Makefile

@@ -3,7 +3,7 @@ vsp1-y					:= vsp1_drv.o vsp1_entity.o vsp1_pipe.o
 vsp1-y					+= vsp1_dl.o vsp1_drm.o vsp1_video.o
 vsp1-y					+= vsp1_rpf.o vsp1_rwpf.o vsp1_wpf.o
 vsp1-y					+= vsp1_clu.o vsp1_hsit.o vsp1_lut.o
-vsp1-y					+= vsp1_bru.o vsp1_sru.o vsp1_uds.o
+vsp1-y					+= vsp1_brx.o vsp1_sru.o vsp1_uds.o
 vsp1-y					+= vsp1_hgo.o vsp1_hgt.o vsp1_histo.o
 vsp1-y					+= vsp1_lif.o
 

drivers/media/platform/vsp1/vsp1.h

@@ -30,7 +30,7 @@ struct rcar_fcp_device;
 struct vsp1_drm;
 struct vsp1_entity;
 struct vsp1_platform_data;
-struct vsp1_bru;
+struct vsp1_brx;
 struct vsp1_clu;
 struct vsp1_hgo;
 struct vsp1_hgt;
@@ -78,8 +78,8 @@ struct vsp1_device {
 	struct rcar_fcp_device *fcp;
 	struct device *bus_master;
 
-	struct vsp1_bru *brs;
-	struct vsp1_bru *bru;
+	struct vsp1_brx *brs;
+	struct vsp1_brx *bru;
 	struct vsp1_clu *clu;
 	struct vsp1_hgo *hgo;
 	struct vsp1_hgt *hgt;