media: Clarify how menus are hidden by SUBDRV_AUTOSELECT

Some users have been having a hard time finding the hidden
menus. A typically case are camera sensor drivers
(e.g IMX219, OV5645, etc), which are common on embedded
platforms and not really "ancillary" devices.

The problem with MEDIA_SUBDRV_AUTOSELECT seems to be related
to the fact that it uses the "visible" syntax to hide
the menus.

This is not obvious and it normally takes some time to
figure out.

To fix the problem, add a comment on each of hidden menus,
which should clarify what option is causing menus to be hidden.
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/Kconfig

@@ -207,6 +207,11 @@ config MEDIA_SUBDRV_AUTOSELECT
 
 	  If unsure say Y.
 
+config MEDIA_HIDE_ANCILLARY_SUBDRV
+        bool
+        depends on MEDIA_SUBDRV_AUTOSELECT && !COMPILE_TEST && !EXPERT
+        default y
+
 config MEDIA_ATTACH
 	bool
 	depends on MEDIA_ANALOG_TV_SUPPORT || MEDIA_DIGITAL_TV_SUPPORT || MEDIA_RADIO_SUPPORT

drivers/media/dvb-frontends/Kconfig

+comment "DVB Frontend drivers hidden by 'Autoselect ancillary drivers'"
+	depends on MEDIA_HIDE_ANCILLARY_SUBDRV
+
 menu "Customise DVB Frontends"
-	visible if !MEDIA_SUBDRV_AUTOSELECT || COMPILE_TEST || EXPERT
+	visible if !MEDIA_HIDE_ANCILLARY_SUBDRV
 
 comment "Multistandard (satellite) frontends"
 	depends on DVB_CORE

drivers/media/i2c/Kconfig

@@ -22,8 +22,11 @@ config VIDEO_IR_I2C
 # Encoder / Decoder module configuration
 #
 
+comment "I2C drivers hidden by 'Autoselect ancillary drivers'"
+	depends on MEDIA_HIDE_ANCILLARY_SUBDRV
+
 menu "I2C Encoders, decoders, sensors and other helper chips"
-	visible if !MEDIA_SUBDRV_AUTOSELECT || COMPILE_TEST || EXPERT
+	visible if !MEDIA_HIDE_ANCILLARY_SUBDRV
 
 comment "Audio decoders, processors and mixers"
 

drivers/media/spi/Kconfig

 # SPDX-License-Identifier: GPL-2.0-only
 if VIDEO_V4L2
 
+comment "SPI drivers hidden by 'Autoselect ancillary drivers'"
+	depends on MEDIA_HIDE_ANCILLARY_SUBDRV
+
 menu "SPI helper chips"
-	visible if !MEDIA_SUBDRV_AUTOSELECT || COMPILE_TEST || EXPERT
+	visible if !MEDIA_HIDE_ANCILLARY_SUBDRV
 
 config VIDEO_GS1662
 	tristate "Gennum Serializers video"

drivers/media/tuners/Kconfig

@@ -15,8 +15,12 @@ config MEDIA_TUNER
 	select MEDIA_TUNER_TDA9887 if MEDIA_SUBDRV_AUTOSELECT
 	select MEDIA_TUNER_MC44S803 if MEDIA_SUBDRV_AUTOSELECT
 
+comment "Tuner drivers hidden by 'Autoselect ancillary drivers'"
+	depends on MEDIA_HIDE_ANCILLARY_SUBDRV
+	depends on MEDIA_ANALOG_TV_SUPPORT || MEDIA_DIGITAL_TV_SUPPORT || MEDIA_RADIO_SUPPORT || MEDIA_SDR_SUPPORT
+
 menu "Customize TV tuners"
-	visible if !MEDIA_SUBDRV_AUTOSELECT || COMPILE_TEST || EXPERT
+	visible if !MEDIA_HIDE_ANCILLARY_SUBDRV
 	depends on MEDIA_ANALOG_TV_SUPPORT || MEDIA_DIGITAL_TV_SUPPORT || MEDIA_RADIO_SUPPORT || MEDIA_SDR_SUPPORT
 
 config MEDIA_TUNER_SIMPLE