media: zr364xx: deprecate this driver

Deprecate the zr364xx driver. This driver does not use the vb2 framework
for video streaming, instead it uses the old videobuf framework.

We want to get rid of these old drivers, so deprecated it for future
removal.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

MAINTAINERS

@@ -21218,7 +21218,7 @@ S:	Maintained
 W:	http://royale.zerezo.com/zr364xx/
 T:	git git://linuxtv.org/media_tree.git
 F:	Documentation/admin-guide/media/zr364xx*
-F:	drivers/media/usb/zr364xx/
+F:	drivers/staging/media/deprecated/zr364xx/
 
 USER-MODE LINUX (UML)
 M:	Richard Weinberger <richard@nod.at>

drivers/media/usb/Kconfig

@@ -18,7 +18,6 @@ source "drivers/media/usb/pwc/Kconfig"
 source "drivers/media/usb/s2255/Kconfig"
 source "drivers/media/usb/usbtv/Kconfig"
 source "drivers/media/usb/uvc/Kconfig"
-source "drivers/media/usb/zr364xx/Kconfig"
 
 endif
 

drivers/media/usb/Makefile

@@ -12,7 +12,6 @@ obj-y += s2255/
 obj-y += siano/
 obj-y += ttusb-budget/
 obj-y += ttusb-dec/
-obj-y += zr364xx/
 
 # Please keep it alphabetically sorted by Kconfig name
 # (e. g. LC_ALL=C sort Makefile)

drivers/staging/media/Kconfig

@@ -58,6 +58,7 @@ if STAGING_MEDIA_DEPRECATED
 source "drivers/staging/media/deprecated/cpia2/Kconfig"
 source "drivers/staging/media/deprecated/meye/Kconfig"
 source "drivers/staging/media/deprecated/stkwebcam/Kconfig"
+source "drivers/staging/media/deprecated/zr364xx/Kconfig"
 endif
 
 endif

drivers/staging/media/Makefile

@@ -12,4 +12,5 @@ obj-$(CONFIG_VIDEO_SUNXI)	+= sunxi/
 obj-$(CONFIG_VIDEO_TEGRA)	+= tegra-video/
 obj-$(CONFIG_VIDEO_HANTRO)	+= hantro/
 obj-$(CONFIG_VIDEO_IPU3_IMGU)	+= ipu3/
+obj-$(CONFIG_USB_ZR364XX)	+= deprecated/zr364xx/
 obj-$(CONFIG_DVB_AV7110)	+= av7110/

drivers/staging/media/deprecated/zr364xx/Kconfig

@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only
 config USB_ZR364XX
-	tristate "USB ZR364XX Camera support"
-	depends on VIDEO_DEV
+	tristate "USB ZR364XX Camera support (DEPRECATED)"
+	depends on USB && VIDEO_DEV
 	select VIDEOBUF_GEN
 	select VIDEOBUF_VMALLOC
 	help
@@ -10,6 +10,9 @@ config USB_ZR364XX
 	  See <file:Documentation/admin-guide/media/zr364xx.rst> for more info
 	  and list of supported cameras.
 
+	  This driver is deprecated and is scheduled for removal by
+	  the beginning of 2023. See the TODO file for more information.
+
 	  To compile this driver as a module, choose M here: the
 	  module will be called zr364xx.
 

drivers/staging/media/deprecated/zr364xx/TODO

@@ -0,0 +1,7 @@
+This is one of the few drivers still not using the vb2
+framework, so this driver is now deprecated with the intent of
+removing it altogether by the beginning of 2023.
+
+In order to keep this driver it has to be converted to vb2.
+If someone is interested in doing this work, then contact the
+linux-media mailinglist (https://linuxtv.org/lists.php).