linux/drivers/media/Kconfig

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# SPDX-License-Identifier: GPL-2.0-only
#
# Multimedia device configuration
#
source "drivers/media/rc/Kconfig"
menuconfig MEDIA_SUPPORT
tristate "Multimedia support"
depends on HAS_IOMEM
help
If you want to use media devices, including Webcams, Video grabber
devices and/or TV devices, V4L2 codecs, etc, enable this option
and other options below.
Additional info and docs are available on the web at
<https://linuxtv.org>
if MEDIA_SUPPORT
config MEDIA_SUPPORT_FILTER
bool "Filter media drivers"
depends on MEDIA_SUPPORT
help
Configuring the media subsystem can be complex, as there are
hundreds of drivers and other config options.
This menu offers option that will help the Kernel's config
system to hide drivers that are out of the scope of the
user needs, and disabling core support for unused APIs.
If not selected, all non-optional media core functionality
needed to support media drivers will be enabled. Also, all
media device drivers should be shown.
menu "Media device types"
visible if MEDIA_SUPPORT_FILTER
#
# Multimedia support - automatically enable V4L2 and DVB core
#
config MEDIA_CAMERA_SUPPORT
bool "Cameras and video grabbers"
default y if !MEDIA_SUPPORT_FILTER
help
Enable support for webcams and video grabbers.
Say Y when you have a webcam or a video capture grabber board.
config MEDIA_ANALOG_TV_SUPPORT
bool "Analog TV"
default y if !MEDIA_SUPPORT_FILTER
help
Enable analog TV support.
Say Y when you have a board with analog TV support.
config MEDIA_DIGITAL_TV_SUPPORT
bool "Digital TV"
default y if !MEDIA_SUPPORT_FILTER
help
Enable digital TV support.
Say Y when you have a board with digital TV support.
config MEDIA_RADIO_SUPPORT
bool "AM/FM radio receivers/transmitters"
default y if !MEDIA_SUPPORT_FILTER
help
Enable AM/FM radio support.
Additional info and docs are available on the web at
<https://linuxtv.org>
Say Y when you have a board with radio support.
config MEDIA_SDR_SUPPORT
bool "Software defined radio"
default y if !MEDIA_SUPPORT_FILTER
help
Enable software defined radio support.
Say Y when you have a software defined radio device.
config MEDIA_CEC_SUPPORT
bool "HDMI CEC"
default y if !MEDIA_SUPPORT_FILTER
help
Enable support for HDMI CEC (Consumer Electronics Control),
which is an optional HDMI feature.
Say Y when you have an HDMI receiver, transmitter or a USB CEC
adapter that supports HDMI CEC.
config MEDIA_PLATFORM_SUPPORT
bool "Platform-specific devices"
default y if !MEDIA_SUPPORT_FILTER
help
Enable support for complex cameras, codecs, and other hardware
that are integrated at the CPU, GPU or on Image Signalling Processor
and don't use PCI, USB or Firewire buses.
This is found on Embedded hardware (SoC), on V4L2 codecs and
on some GPU and newer CPU chipsets.
Say Y when you want to be able so see such devices.
config MEDIA_TEST_SUPPORT
bool "Test drivers"
default y if !MEDIA_SUPPORT_FILTER
help
Those drivers should not be used on production Kernels, but
can be useful on debug ones. It enables several dummy drivers
that simulate a real hardware. Very useful to test userspace
applications and to validate if the subsystem core is doesn't
have regressions.
Say Y if you want to use some virtual test driver.
In case of doubts, say N.
Say Y when you have a software defined radio device.
endmenu # media device types
comment "Multimedia core features"
#
# Video4Linux support
# Only enables if one of the V4L2 types (ATV, webcam, radio) is selected
#
comment "Video4Linux core enabled to support hybrid TV devices"
depends on MEDIA_HYBRID_USB || MEDIA_HYBRID_PCI
config VIDEO_DEV
tristate
prompt "Video4Linux core" if !(MEDIA_HYBRID_USB || MEDIA_HYBRID_PCI)
default MEDIA_CAMERA_SUPPORT || MEDIA_ANALOG_TV_SUPPORT || MEDIA_RADIO_SUPPORT || MEDIA_SDR_SUPPORT || MEDIA_PLATFORM_SUPPORT || MEDIA_TEST_SUPPORT || MEDIA_HYBRID_USB || MEDIA_HYBRID_PCI
#
# DVB Core
# Only enables if one of DTV is selected
#
comment "Digital TV core enabled to support hybrid TV devices"
depends on MEDIA_HYBRID_USB || MEDIA_HYBRID_PCI
config DVB_CORE
tristate
prompt "Digital TV core" if !(MEDIA_HYBRID_USB || MEDIA_HYBRID_PCI)
depends on MEDIA_DIGITAL_TV_SUPPORT
depends on (I2C || I2C=n)
default y
select CRC32
help
source "drivers/media/v4l2-core/Kconfig"
source "drivers/media/mc/Kconfig"
source "drivers/media/dvb-core/Kconfig"
source "drivers/media/cec/Kconfig"
comment "Media drivers"
comment "Drivers filtered as selected at 'Filter media drivers'"
depends on MEDIA_SUPPORT_FILTER
source "drivers/media/usb/Kconfig"
source "drivers/media/pci/Kconfig"
source "drivers/media/radio/Kconfig"
# Common driver options
source "drivers/media/common/Kconfig"
if MEDIA_PLATFORM_SUPPORT
source "drivers/media/platform/Kconfig"
source "drivers/media/test_drivers/Kconfig"
source "drivers/media/mmc/Kconfig"
endif
source "drivers/media/firewire/Kconfig"
comment "Media ancillary drivers (tuners, sensors, i2c, spi, frontends)"
#
# Ancillary drivers (tuners, i2c, spi, frontends)
#
config MEDIA_SUBDRV_AUTOSELECT
bool "Autoselect ancillary drivers (tuners, sensors, i2c, spi, frontends)"
depends on MEDIA_ANALOG_TV_SUPPORT || MEDIA_DIGITAL_TV_SUPPORT || MEDIA_CAMERA_SUPPORT || MEDIA_SDR_SUPPORT
[media] subdev autoselect only works if I2C and I2C_MUX is selected As reported by the kbuild test robot <fengguang.wu@intel.com>: > warning: (VIDEO_EM28XX_DVB) selects DVB_M88DS3103 which has unmet direct dependencies (MEDIA_SUPPORT && DVB_CORE && I2C && I2C_MUX) > drivers/built-in.o: In function `m88ds3103_release': > >> m88ds3103.c:(.text+0x1ab1af): undefined reference to `i2c_del_mux_adapter' > drivers/built-in.o: In function `m88ds3103_attach': > >> (.text+0x1ab342): undefined reference to `i2c_add_mux_adapter' There are 3 possible ways to fix it: 1) make em28xx dependent on I2C_MUX. That sounds wrong, as the em28xx bridge doesn't have i2c muxes on it, and just one frontend has. Well, subdevs could eventually be converted to, instead of using dvb i2c gate control, to use i2c mux support. That makes sense, but it takes time and lots of effort. Not sure if this will happen anytime soon. 2) MEDIA_SUBDRV_AUTOSELECT can be dependent of I2C and I2C_MUX. That means that users will need to manually enable I2C_MUX on some distributions. Not sure about others, but, on Fedora, this option is disabled. So, it can end by generating a number of complains from users that their devices suddenly stopped working after a Kernel upgrade, at least until all distros that ship Kernels with I2C_MUX enabled. 3) if MEDIA_SUBDRV_AUTOSELECT is selected, it will select I2C and I2C_MUX. Of course, MEDIA_SUBDRV_AUTOSELECT will need to inherit all dependencies that I2C and I2C_MUX have (only HAS_IOMEM). The disadvantage is that, if new dependencies are added on I2C, they'll also need to be added here. As the hole idea of autoselect is to let the user not bother about whatever frontend/tuner is used by a driver, IMHO, (3) is the better solution. Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
2013-12-21 15:42:11 +08:00
depends on HAS_IOMEM
select I2C
select I2C_MUX
default y if !EMBEDDED
help
By default, a media driver auto-selects all possible ancillary
devices such as tuners, sensors, video encoders/decoders and
frontends, that are used by any of the supported devices.
This is generally the right thing to do, except when there
are strict constraints with regards to the kernel size,
like on embedded systems.
Use this option with care, as deselecting ancillary drivers which
are, in fact, necessary will result in the lack of the needed
functionality for your device (it may not tune or may not have
the needed demodulators).
If unsure say Y.
config MEDIA_HIDE_ANCILLARY_SUBDRV
bool
depends on MEDIA_SUBDRV_AUTOSELECT && !COMPILE_TEST && !EXPERT
default y
[media] Fix build when drivers are builtin and frontend modules There are a large number of reports that the media build is not compiling when some drivers are compiled as builtin, while the needed frontends are compiled as module. On the last one of such reports: From: kbuild test robot <fengguang.wu@intel.com> Subject: saa7134-dvb.c:undefined reference to `zl10039_attach' The .config file has: CONFIG_VIDEO_SAA7134=y CONFIG_VIDEO_SAA7134_DVB=y # CONFIG_MEDIA_ATTACH is not set CONFIG_DVB_ZL10039=m And it produces all those errors: drivers/built-in.o: In function `set_type': tuner-core.c:(.text+0x2f263e): undefined reference to `tea5767_attach' tuner-core.c:(.text+0x2f273e): undefined reference to `tda9887_attach' drivers/built-in.o: In function `tuner_probe': tuner-core.c:(.text+0x2f2d20): undefined reference to `tea5767_autodetection' drivers/built-in.o: In function `av7110_attach': av7110.c:(.text+0x330bda): undefined reference to `ves1x93_attach' av7110.c:(.text+0x330bf7): undefined reference to `stv0299_attach' av7110.c:(.text+0x330c63): undefined reference to `tda8083_attach' av7110.c:(.text+0x330d09): undefined reference to `ves1x93_attach' av7110.c:(.text+0x330d33): undefined reference to `tda8083_attach' av7110.c:(.text+0x330d5d): undefined reference to `stv0297_attach' av7110.c:(.text+0x330dbe): undefined reference to `stv0299_attach' drivers/built-in.o: In function `tuner_attach_dtt7520x': ngene-cards.c:(.text+0x3381cb): undefined reference to `dvb_pll_attach' drivers/built-in.o: In function `demod_attach_lg330x': ngene-cards.c:(.text+0x33828a): undefined reference to `lgdt330x_attach' drivers/built-in.o: In function `demod_attach_stv0900': ngene-cards.c:(.text+0x3383d5): undefined reference to `stv090x_attach' drivers/built-in.o: In function `cineS2_probe': ngene-cards.c:(.text+0x338b7f): undefined reference to `drxk_attach' drivers/built-in.o: In function `configure_tda827x_fe': saa7134-dvb.c:(.text+0x346ae7): undefined reference to `tda10046_attach' drivers/built-in.o: In function `dvb_init': saa7134-dvb.c:(.text+0x347283): undefined reference to `mt352_attach' saa7134-dvb.c:(.text+0x3472cd): undefined reference to `mt352_attach' saa7134-dvb.c:(.text+0x34731c): undefined reference to `tda10046_attach' saa7134-dvb.c:(.text+0x34733c): undefined reference to `tda10046_attach' saa7134-dvb.c:(.text+0x34735c): undefined reference to `tda10046_attach' saa7134-dvb.c:(.text+0x347378): undefined reference to `tda10046_attach' saa7134-dvb.c:(.text+0x3473db): undefined reference to `tda10046_attach' drivers/built-in.o:saa7134-dvb.c:(.text+0x347502): more undefined references to `tda10046_attach' follow drivers/built-in.o: In function `dvb_init': saa7134-dvb.c:(.text+0x347812): undefined reference to `mt352_attach' saa7134-dvb.c:(.text+0x347951): undefined reference to `mt312_attach' saa7134-dvb.c:(.text+0x3479a9): undefined reference to `mt312_attach' >> saa7134-dvb.c:(.text+0x3479c1): undefined reference to `zl10039_attach' This is happening because a builtin module can't use directly a symbol found on a module. By enabling CONFIG_MEDIA_ATTACH, the configuration becomes valid, as dvb_attach() macro loads the module if needed, making the symbol available to the builtin module. While this bug started to appear after the patches that use IS_DEFINED macro (like changeset 7b34be71db533f3e0cf93d53cf62d036cdb5418a), this bug is a way ancient than that. The thing is that, before the IS_DEFINED() patches, the logic used to be: && defined(MODULE)) struct dvb_frontend *zl10039_attach(struct dvb_frontend *fe, u8 i2c_addr, struct i2c_adapter *i2c); static inline struct dvb_frontend *zl10039_attach(struct dvb_frontend *fe, u8 i2c_addr, struct i2c_adapter *i2c) { printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__); return NULL; } The above code, with the .config file used, was evoluting to FALSE (instead of TRUE as it should be, as CONFIG_DVB_ZL10039 is 'm'), and were adding the static inline code at saa7134-dvb, instead of the external call. So, while it weren't producing any compilation error, the code weren't working either. So, as the overhead for using CONFIG_MEDIA_ATTACH is minimal, just enable it, if MODULES is defined. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-06-20 21:35:53 +08:00
config MEDIA_ATTACH
bool
depends on MEDIA_ANALOG_TV_SUPPORT || MEDIA_DIGITAL_TV_SUPPORT || MEDIA_RADIO_SUPPORT
depends on MODULES
default MODULES
source "drivers/media/i2c/Kconfig"
source "drivers/media/spi/Kconfig"
source "drivers/media/tuners/Kconfig"
source "drivers/media/dvb-frontends/Kconfig"
endif # MEDIA_SUPPORT