[media] Cleanup media Kconfig files

- get rid of ridden V4L2_COMMON symbol

  This symbol is not needed anymore; it can be folded with V4L2
  one, simplifying the Kconfig a little bit;

- Comment why some Kconfig items are needed;

- Remove if test for MEDIA_CAMERA_SUPPORT, replacing it by
  depends on.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

2 files changed, 17 insertions, 12 deletions

diff --git a/drivers/media/v4l2-core/Kconfig b/drivers/media/v4l2-core/Kconfig
index 05e530c0b012..0c54e19d9944 100644
--- a/drivers/media/v4l2-core/Kconfig
+++ b/drivers/media/v4l2-core/Kconfig
@@ -2,6 +2,12 @@
 # Generic video config states
 #
 
+# Enable the V4L2 core and API
+config VIDEO_V4L2
+        tristate
+        depends on (I2C || I2C=n) && VIDEO_DEV
+        default (I2C || I2C=n) && VIDEO_DEV
+
 config VIDEO_ADV_DEBUG
         bool "Enable advanced debug functionality on V4L2 drivers"
         default n
@@ -19,11 +25,17 @@ config VIDEO_FIXED_MINOR_RANGES
 
           When in doubt, say N.
 
-config VIDEO_V4L2
+# Used by drivers that need tuner.ko
+config VIDEO_TUNER
         tristate
-        depends on VIDEO_V4L2_COMMON
-        default y
+        depends on MEDIA_TUNER
+
+# Used by drivers that need v4l2-mem2mem.ko
+config V4L2_MEM2MEM_DEV
+        tristate
+        depends on VIDEOBUF2_CORE
 
+# Used by drivers that need Videobuf modules
 config VIDEOBUF_GEN
         tristate
 
@@ -45,14 +57,7 @@ config VIDEOBUF_DVB
         tristate
         select VIDEOBUF_GEN
 
-config VIDEO_TUNER
-        tristate
-        depends on MEDIA_TUNER
-
-config V4L2_MEM2MEM_DEV
-        tristate
-        depends on VIDEOBUF2_CORE
-
+# Used by drivers that need Videobuf2 modules
 config VIDEOBUF2_CORE
         tristate
 
diff --git a/drivers/media/v4l2-core/Makefile b/drivers/media/v4l2-core/Makefile
index c0e90bc23692..c2d61d4f03d1 100644
--- a/drivers/media/v4l2-core/Makefile
+++ b/drivers/media/v4l2-core/Makefile
@@ -11,7 +11,7 @@ ifeq ($(CONFIG_COMPAT),y)
 endif
 
 obj-$(CONFIG_VIDEO_DEV) += videodev.o v4l2-int-device.o
-obj-$(CONFIG_VIDEO_V4L2_COMMON) += v4l2-common.o
+obj-$(CONFIG_VIDEO_V4L2) += v4l2-common.o
 
 obj-$(CONFIG_VIDEO_TUNER) += tuner.o