[media] MEM2MEM: Add support for eMMa-PrP mem2mem operations

i.MX2x SoCs have a PrP which is capable of resizing and format
conversion of video frames. This driver provides support for
resizing and format conversion from YUYV to YUV420.

This operation is of the utmost importance since some of these
SoCs like i.MX27 include an H.264 video codec which only
accepts YUV420 as input.
Reviewed-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: NJavier Martin <javier.martin@vista-silicon.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/Kconfig

@@ -1176,4 +1176,14 @@ config VIDEO_SAMSUNG_S5P_MFC
 	help
 	    MFC 5.1 driver for V4L2.
 
+config VIDEO_MX2_EMMAPRP
+	tristate "MX2 eMMa-PrP support"
+	depends on VIDEO_DEV && VIDEO_V4L2 && SOC_IMX27
+	select VIDEOBUF2_DMA_CONTIG
+	select V4L2_MEM2MEM_DEV
+	help
+	    MX2X chips have a PrP that can be used to process buffers from
+	    memory to memory. Operations include resizing and format
+	    conversion.
+
 endif # V4L_MEM2MEM_DRIVERS

drivers/media/video/Makefile

@@ -177,6 +177,8 @@ obj-$(CONFIG_VIDEO_SH_MOBILE_CEU)	+= sh_mobile_ceu_camera.o
 obj-$(CONFIG_VIDEO_OMAP1)		+= omap1_camera.o
 obj-$(CONFIG_VIDEO_ATMEL_ISI)		+= atmel-isi.o
 
+obj-$(CONFIG_VIDEO_MX2_EMMAPRP)		+= mx2_emmaprp.o
+
 obj-$(CONFIG_VIDEO_SAMSUNG_S5P_FIMC) 	+= s5p-fimc/
 obj-$(CONFIG_VIDEO_SAMSUNG_S5P_JPEG)	+= s5p-jpeg/
 obj-$(CONFIG_VIDEO_SAMSUNG_S5P_MFC)	+= s5p-mfc/