V4L/DVB (7133): Fix Kconfig dependencies

As pointed by Adrian Bunk, with I2C=m and VIDEO_DEV=y, videodev brokes.

This patch moves the functions that videodev needs from v4l2-common. It also
fixes some Kconfig changes.

After this patch, I2C=m / VIDEO_DEV=y will make v4l2 core statically linked
into kernel. v4l2-common will be m, and all V4L drivers will also be m.

This approach is very conservative, since it is possible to have V4L drivers
that don't need I2C or v4l2-common. The better is to map what drivers really
need v4l2-common, making them to select v4l2-common, and allowing the others to
be 'y', 'm' and 'n'.
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/Kconfig

@@ -32,9 +32,9 @@ config VIDEO_V4L2_COMMON
 
 config VIDEO_V4L1
 	bool "Enable Video For Linux API 1 (DEPRECATED)"
-	depends on VIDEO_DEV
+	depends on VIDEO_DEV && VIDEO_V4L2_COMMON
+	default VIDEO_DEV && VIDEO_V4L2_COMMON
 	select VIDEO_V4L1_COMPAT
-	default y
 	---help---
 	  Enables a compatibility API used by most V4L2 devices to allow
 	  its usage with legacy applications that supports only V4L1 api.
@@ -44,7 +44,7 @@ config VIDEO_V4L1
 config VIDEO_V4L1_COMPAT
 	bool "Enable Video For Linux API 1 compatible Layer"
 	depends on VIDEO_DEV
-	default y
+	default VIDEO_DEV
 	---help---
 	  This api were developed to be used at Kernel 2.2 and 2.4, but
 	  lacks support for several video standards. There are several
@@ -60,8 +60,8 @@ config VIDEO_V4L1_COMPAT
 
 config VIDEO_V4L2
 	bool
-	depends on VIDEO_DEV
-	default y
+	depends on VIDEO_DEV && VIDEO_V4L2_COMMON
+	default VIDEO_DEV && VIDEO_V4L2_COMMON
 
 source "drivers/media/video/Kconfig"
 
@@ -185,7 +185,6 @@ config VIDEO_TVEEPROM
 
 config DAB
 	boolean "DAB adapters"
-	default y
 	---help---
 	  Allow selecting support for for Digital Audio Broadcasting (DAB)
 	  Receiver adapters.

drivers/media/common/Kconfig

@@ -4,6 +4,6 @@ config VIDEO_SAA7146
 
 config VIDEO_SAA7146_VV
 	tristate
-	depends on VIDEO_DEV
+	depends on VIDEO_V4L2
 	select VIDEOBUF_DMA_SG
 	select VIDEO_SAA7146

drivers/media/radio/Kconfig

@@ -4,12 +4,12 @@
 
 menuconfig RADIO_ADAPTERS
 	bool "Radio Adapters"
-	depends on VIDEO_DEV
+	depends on VIDEO_V4L2
 	default y
 	---help---
 	  Say Y here to enable selecting AM/FM radio adapters.
 
-if RADIO_ADAPTERS && VIDEO_DEV
+if RADIO_ADAPTERS && VIDEO_V4L2
 
 config RADIO_CADET
 	tristate "ADS Cadet AM/FM Tuner"

drivers/media/video/Kconfig

@@ -4,14 +4,14 @@
 
 menuconfig VIDEO_CAPTURE_DRIVERS
 	bool "Video capture adapters"
-	depends on VIDEO_DEV
+	depends on VIDEO_V4L2
 	default y
 	---help---
 	  Say Y here to enable selecting the video adapters for
 	  webcams, analog TV, and hybrid analog/digital TV.
 	  Some of those devices also supports FM radio.
 
-if VIDEO_CAPTURE_DRIVERS && VIDEO_DEV
+if VIDEO_CAPTURE_DRIVERS && VIDEO_V4L2
 
 config VIDEO_ADV_DEBUG
 	bool "Enable advanced debug functionality"

include/media/v4l2-common.h

@@ -61,8 +61,6 @@
 			v4l_client_printk(KERN_DEBUG, client, fmt , ## arg); \
 	} while (0)
 
-/* Prints the ioctl in a human-readable format */
-extern void v4l_printk_ioctl(unsigned int cmd);
 
 /* Use this macro for non-I2C drivers. Pass the driver name as the first arg. */
 #define v4l_print_ioctl(name, cmd)  		 \

include/media/v4l2-dev.h

@@ -44,6 +44,8 @@ extern unsigned int v4l2_video_std_fps(struct v4l2_standard *vs);
 extern char *v4l2_norm_to_name(v4l2_std_id id);
 extern int v4l2_video_std_construct(struct v4l2_standard *vs,
 				    int id, char *name);
+/* Prints the ioctl in a human-readable format */
+extern void v4l_printk_ioctl(unsigned int cmd);
 
 /* prority handling */
 struct v4l2_prio_state {