media: imx: Unstage the imx8mq-mipi-csi2 driver

The imx8mq-mipi-csi2 MIPI CSI-2 receiver driver is used and maintained.
There is no reason to keep it in staging. The accompanying CSI bridge
driver that uses it is in drivers/media/platform/nxp as well.

One TODO is to get rid of csi_state's "state" and "lock" variables.
Especially make sure suspend/resume is working without them. That can
very well be worked on from the new location.

Also add a MAINTAINERS section for the imx8mq-mipi-csi2 mipi receiver
driver.
Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

MAINTAINERS

@@ -13004,17 +13004,21 @@ F:	drivers/staging/media/imx/
 F:	include/linux/imx-media.h
 F:	include/media/imx.h
 
-MEDIA DRIVERS FOR FREESCALE IMX7
+MEDIA DRIVERS FOR FREESCALE IMX7/8
 M:	Rui Miguel Silva <rmfrfs@gmail.com>
 M:	Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+M:	Martin Kepplinger <martin.kepplinger@puri.sm>
+R:	Purism Kernel Team <kernel@puri.sm>
 L:	linux-media@vger.kernel.org
 S:	Maintained
 T:	git git://linuxtv.org/media_tree.git
 F:	Documentation/admin-guide/media/imx7.rst
 F:	Documentation/devicetree/bindings/media/nxp,imx-mipi-csi2.yaml
 F:	Documentation/devicetree/bindings/media/nxp,imx7-csi.yaml
+F:	Documentation/devicetree/bindings/media/nxp,imx8mq-mipi-csi2.yaml
 F:	drivers/media/platform/nxp/imx-mipi-csis.c
 F:	drivers/media/platform/nxp/imx7-media-csi.c
+F:	drivers/media/platform/nxp/imx8mq-mipi-csi.c
 
 MEDIA DRIVERS FOR HELENE
 M:	Abylay Ospan <aospan@netup.ru>

drivers/media/platform/nxp/Kconfig

@@ -17,6 +17,17 @@ config VIDEO_IMX7_CSI
 	  Driver for the NXP Camera Sensor Interface (CSI) Bridge. This device
 	  is found in the i.MX6UL/L, i.MX7 and i.MX8M[MQ] SoCs.
 
+config VIDEO_IMX8MQ_MIPI_CSI2
+	tristate "NXP i.MX8MQ MIPI CSI-2 receiver"
+	depends on ARCH_MXC || COMPILE_TEST
+	depends on VIDEO_DEV
+	select MEDIA_CONTROLLER
+	select V4L2_FWNODE
+	select VIDEO_V4L2_SUBDEV_API
+	help
+	  Video4Linux2 driver for the MIPI CSI-2 receiver found on the i.MX8MQ
+	  SoC.
+
 config VIDEO_IMX_MIPI_CSIS
 	tristate "NXP MIPI CSI-2 CSIS receiver found on i.MX7 and i.MX8 models"
 	depends on ARCH_MXC || COMPILE_TEST

drivers/media/platform/nxp/Makefile

@@ -5,6 +5,7 @@ obj-y += imx-jpeg/
 obj-y += imx8-isi/
 
 obj-$(CONFIG_VIDEO_IMX7_CSI) += imx7-media-csi.o
+obj-$(CONFIG_VIDEO_IMX8MQ_MIPI_CSI2) += imx8mq-mipi-csi2.o
 obj-$(CONFIG_VIDEO_IMX_MIPI_CSIS) += imx-mipi-csis.o
 obj-$(CONFIG_VIDEO_IMX_PXP) += imx-pxp.o
 obj-$(CONFIG_VIDEO_MX2_EMMAPRP) += mx2_emmaprp.o

drivers/staging/media/imx/Kconfig

@@ -25,13 +25,3 @@ config VIDEO_IMX_CSI
 	  A video4linux camera sensor interface driver for i.MX5/6.
 endmenu
 endif
-
-config VIDEO_IMX8MQ_MIPI_CSI2
-	tristate "NXP i.MX8MQ MIPI CSI-2 receiver"
-	depends on ARCH_MXC || COMPILE_TEST
-	depends on VIDEO_DEV
-	select MEDIA_CONTROLLER
-	select V4L2_FWNODE
-	select VIDEO_V4L2_SUBDEV_API
-	help
-	  V4L2 driver for the MIPI CSI-2 receiver found in the i.MX8MQ SoC.

drivers/staging/media/imx/Makefile

@@ -13,5 +13,3 @@ obj-$(CONFIG_VIDEO_IMX_MEDIA) += imx-media-common.o
 obj-$(CONFIG_VIDEO_IMX_CSI) += imx6-media.o
 obj-$(CONFIG_VIDEO_IMX_CSI) += imx6-media-csi.o
 obj-$(CONFIG_VIDEO_IMX_CSI) += imx6-mipi-csi2.o
-
-obj-$(CONFIG_VIDEO_IMX8MQ_MIPI_CSI2) += imx8mq-mipi-csi2.o