media: atmel: introduce microchip csi2dc driver

Microchip CSI2DC (CSI2 Demultiplexer Controller) is a misc bridge device
that converts a byte stream in IDI Synopsys format (coming from a CSI2HOST)
to a pixel stream that can be captured by a sensor controller.
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Reviewed-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/Makefile

@@ -69,6 +69,7 @@ obj-$(CONFIG_VIDEO_RCAR_VIN)		+= rcar-vin/
 obj-$(CONFIG_VIDEO_ATMEL_ISC)		+= atmel/
 obj-$(CONFIG_VIDEO_ATMEL_ISI)		+= atmel/
 obj-$(CONFIG_VIDEO_ATMEL_XISC)		+= atmel/
+obj-$(CONFIG_VIDEO_MICROCHIP_CSI2DC)	+= atmel/
 
 obj-$(CONFIG_VIDEO_STM32_DCMI)		+= stm32/
 obj-$(CONFIG_VIDEO_STM32_DMA2D)		+= stm32/

drivers/media/platform/atmel/Kconfig

@@ -40,3 +40,18 @@ config VIDEO_ATMEL_ISI
 	help
 	  This module makes the ATMEL Image Sensor Interface available
 	  as a v4l2 device.
+
+config VIDEO_MICROCHIP_CSI2DC
+	tristate "Microchip CSI2 Demux Controller"
+	depends on VIDEO_V4L2 && COMMON_CLK && OF
+	depends on ARCH_AT91 || COMPILE_TEST
+	select MEDIA_CONTROLLER
+	select VIDEO_V4L2_SUBDEV_API
+	select V4L2_FWNODE
+	help
+	  CSI2 Demux Controller driver. CSI2DC is a helper chip
+	  that converts IDI interface byte stream to a parallel pixel stream.
+	  It supports various RAW formats as input.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called microchip-csi2dc.

drivers/media/platform/atmel/Makefile

@@ -6,3 +6,4 @@ obj-$(CONFIG_VIDEO_ATMEL_ISI) += atmel-isi.o
 obj-$(CONFIG_VIDEO_ATMEL_ISC_BASE) += atmel-isc-base.o
 obj-$(CONFIG_VIDEO_ATMEL_ISC) += atmel-isc.o
 obj-$(CONFIG_VIDEO_ATMEL_XISC) += atmel-xisc.o
+obj-$(CONFIG_VIDEO_MICROCHIP_CSI2DC) += microchip-csi2dc.o