media: platform: dwc: Add MIPI CSI-2 controller driver

Add the Synopsys MIPI CSI-2 controller driver. This
controller driver is divided in platform functions and core functions.
This way it serves as platform for future DesignWare drivers.

Signed-off-by: Luis Oliveira <luis.oliveira@synopsys.com>
Co-developed-by: Eugen Hristev <eugen.hristev@microchip.com>
[eugen.hristev@microchip.com:
Add format SRGGB10 to supported format list.
Write the data type to the correct register DATA_IDS_1.
Changed dev_info to dev_dbg to remove extra chatty messages
Avoid overwriting static array of formats]
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
[luis.oliveira@synopsys.com: Add MIPI CSI-2 platform data]
Signed-off-by: Luis Oliveira <luis.oliveira@synopsys.com>
[eugen.hristev@microchip.com:
Add support for periph clock and phy clock
Fix enum_mbus function
Implement get_mbus_config
Implement media controller
Update to use fwnode API
In s_stream, first start/stop the sensor
remove chatty 'number of lanes' message]
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
[conor.dooley@microchip.com: fix potential uninitialized variable use]
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
[eugen.hristev@microchip.com: port to kernel 5.16, 5.17]
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>

Author: Luis Oliveira

MAINTAINERS

@@ -20830,6 +20830,15 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml
 F:	drivers/dma/dw-axi-dmac/
 
+SYNOPSYS DESIGNWARE MIPI DPHY CSI-2 HOST DRIVER
+M:	Luis Oliveira <luis.oliveira@synopsys.com>
+L:	linux-media@vger.kernel.org
+S:	Maintained
+T:	git git://linuxtv.org/media_tree.git
+F:	drivers/media/platform/dwc
+F:	Documentation/devicetree/bindings/media/snps,dw-csi.yaml
+F:	include/media/dwc/dw-csi-data.h
+
 SYNOPSYS DESIGNWARE DMAC DRIVER
 M:	Viresh Kumar <vireshk@kernel.org>
 R:	Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/media/platform/Kconfig

@@ -69,6 +69,7 @@ source "drivers/media/platform/aspeed/Kconfig"
 source "drivers/media/platform/atmel/Kconfig"
 source "drivers/media/platform/cadence/Kconfig"
 source "drivers/media/platform/chips-media/Kconfig"
+source "drivers/media/platform/dwc/Kconfig"
 source "drivers/media/platform/intel/Kconfig"
 source "drivers/media/platform/marvell/Kconfig"
 source "drivers/media/platform/mediatek/Kconfig"

drivers/media/platform/Makefile

@@ -12,6 +12,7 @@ obj-y += aspeed/
 obj-y += atmel/
 obj-y += cadence/
 obj-y += chips-media/
+obj-y += dwc/
 obj-y += intel/
 obj-y += marvell/
 obj-y += mediatek/

drivers/media/platform/dwc/Kconfig

@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+#  Synopsys DWC Platform drivers
+#	Drivers here are currently for MIPI CSI-2 support
+
+config DWC_MIPI_CSI2_HOST
+	tristate "Synopsys DesignWare CSI-2 Host Controller support"
+	select VIDEO_DEV
+	select VIDEO_V4L2
+	select VIDEO_V4L2_SUBDEV_API
+	select V4L2_FWNODE
+	help
+	  This selects the DesignWare MIPI CSI-2 host controller support. This
+	  controller gives access to control a CSI-2 receiver acting as a V4L2
+	  subdevice.
+
+	  If you have a controller with this interface, say Y.
+
+	   If unsure, say N.

drivers/media/platform/dwc/Makefile

@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for Synopsys DWC Platform drivers
+#
+dw-csi-objs := dw-csi-plat.o dw-mipi-csi.o
+ifeq ($(CONFIG_DWC_MIPI_TC_DPHY_GEN3),y)
+	dw-csi-objs += dw-csi-sysfs.o
+endif
+obj-$(CONFIG_DWC_MIPI_CSI2_HOST) += dw-csi.o