media: cpia2: deprecate this driver

Deprecate the cpia2 driver. This driver does not use the vb2 framework
for video streaming, instead it implements its own version.

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>

drivers/media/usb/Kconfig

@@ -13,7 +13,6 @@ if MEDIA_USB_SUPPORT
 if MEDIA_CAMERA_SUPPORT
 	comment "Webcam devices"
 
-source "drivers/media/usb/cpia2/Kconfig"
 source "drivers/media/usb/gspca/Kconfig"
 source "drivers/media/usb/pwc/Kconfig"
 source "drivers/media/usb/s2255/Kconfig"

drivers/media/usb/Makefile

@@ -24,7 +24,6 @@ obj-$(CONFIG_USB_MSI2500) += msi2500/
 obj-$(CONFIG_USB_PWC) += pwc/
 obj-$(CONFIG_USB_VIDEO_CLASS) += uvc/
 obj-$(CONFIG_VIDEO_AU0828) += au0828/
-obj-$(CONFIG_VIDEO_CPIA2) += cpia2/
 obj-$(CONFIG_VIDEO_CX231XX) += cx231xx/
 obj-$(CONFIG_VIDEO_EM28XX) += em28xx/
 obj-$(CONFIG_VIDEO_GO7007) += go7007/

drivers/staging/media/Kconfig

@@ -55,6 +55,7 @@ menuconfig STAGING_MEDIA_DEPRECATED
 	  If in doubt, say N here.
 
 if STAGING_MEDIA_DEPRECATED
+source "drivers/staging/media/deprecated/cpia2/Kconfig"
 source "drivers/staging/media/deprecated/stkwebcam/Kconfig"
 endif
 

drivers/staging/media/Makefile

 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_INTEL_ATOMISP)     += atomisp/
+obj-$(CONFIG_VIDEO_CPIA2)	+= deprecated/cpia2/
 obj-$(CONFIG_VIDEO_IMX_MEDIA)	+= imx/
 obj-$(CONFIG_VIDEO_MAX96712)	+= max96712/
 obj-$(CONFIG_VIDEO_MESON_VDEC)	+= meson/vdec/

drivers/media/usb/cpia2/Kconfig → drivers/staging/media/deprecated/cpia2/Kconfig

 # SPDX-License-Identifier: GPL-2.0-only
 config VIDEO_CPIA2
-	tristate "CPiA2 Video For Linux"
+	tristate "CPiA2 Video For Linux (DEPRECATED)"
 	depends on USB && VIDEO_DEV
 	help
 	  This is the video4linux driver for cameras based on Vision's CPiA2
 	  (Colour Processor Interface ASIC), such as the Digital Blue QX5
 	  Microscope. If you have one of these cameras, say Y here
 
+	  This driver is deprecated and is scheduled for removal by
+	  the beginning of 2023. See the TODO file for more information.
+
 	  This driver is also available as a module (cpia2).

drivers/staging/media/deprecated/cpia2/TODO

+The cpia2 driver does not use the vb2 framework for streaming
+video, instead it implements this in the driver.
+
+To prevent removal of this driver early 2023 it has to be
+converted to use vb2. Contact the linux-media@vger.kernel.org
+mailing list if you want to do this.