[media] media: add a VEU MEM2MEM format conversion and scaling driver

Video Engine Unit (VEU) is an IP block, found in multiple SuperH and ARM-
based sh-mobile and r-mobile SoCs, capable of processing video data. It
can perform colour-space conversion, scaling and several filtering
transformations. This patch adds an initial implementation of a mem2mem
V4L2 driver for VEU. So far only conversion from NV12 to RGB565 is
supported. Further functionality shall be added in the future.
This driver is based on a VEU vidix driver by Magnus Damm.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/platform/Kconfig

@@ -202,6 +202,15 @@ config VIDEO_SAMSUNG_EXYNOS_GSC
 	help
 	  This is a v4l2 driver for Samsung EXYNOS5 SoC G-Scaler.
 
+config VIDEO_SH_VEU
+	tristate "SuperH VEU mem2mem video processing driver"
+	depends on VIDEO_DEV && VIDEO_V4L2
+	select VIDEOBUF2_DMA_CONTIG
+	select V4L2_MEM2MEM_DEV
+	help
+	    Support for the Video Engine Unit (VEU) on SuperH and
+	    SH-Mobile SoCs.
+
 endif # V4L_MEM2MEM_DRIVERS
 
 menuconfig V4L_TEST_DRIVERS

drivers/media/platform/Makefile

@@ -25,6 +25,8 @@ obj-$(CONFIG_VIDEO_MEM2MEM_TESTDEV) += mem2mem_testdev.o
 obj-$(CONFIG_VIDEO_MX2_EMMAPRP)		+= mx2_emmaprp.o
 obj-$(CONFIG_VIDEO_CODA) 		+= coda.o
 
+obj-$(CONFIG_VIDEO_SH_VEU)		+= sh_veu.o
+
 obj-$(CONFIG_VIDEO_MEM2MEM_DEINTERLACE)	+= m2m-deinterlace.o
 
 obj-$(CONFIG_VIDEO_S3C_CAMIF) 		+= s3c-camif/