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linux-usb@vger.kernel.org, mjpeg-users@lists.sourceforge.net, openbmc@lists.ozlabs.org Subject: Re: [PATCH] media: Kconfig: cleanup VIDEO_DEV dependencies Message-ID: <20220314150745.ph2jpjpvdft3645v@uno.localdomain> References: <42ae3d28d4d822f3e14db76b99f2f4c41688ae3e.1647155467.git.mchehab@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <42ae3d28d4d822f3e14db76b99f2f4c41688ae3e.1647155467.git.mchehab@kernel.org> X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RCVD_IN_MSPIKE_H2, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Mauro On Sun, Mar 13, 2022 at 08:12:05AM +0100, Mauro Carvalho Chehab wrote: > media Kconfig has two entries associated to V4L API: > VIDEO_DEV and VIDEO_V4L2. > > On Kernel 2.6.x, there were two V4L APIs, each one with its own flag. > VIDEO_DEV were meant to: > 1) enable Video4Linux and make its Kconfig options to appear; > 2) it makes the Kernel build the V4L core. > > while VIDEO_V4L2 where used to distinguish between drivers that > implement the newer API and drivers that implemented the former one. > > With time, such meaning changed, specially after the removal of > all V4L version 1 drivers. > > At the current implementation, VIDEO_DEV only does (1): it enables > the media options related to V4L, that now has: > > menu "Video4Linux options" > visible if VIDEO_DEV > > source "drivers/media/v4l2-core/Kconfig" > endmenu > > but it doesn't affect anymore the V4L core drivers. > > The rationale is that the V4L2 core has a "soft" dependency > at the I2C bus, and now requires to select a number of other > Kconfig options: > > config VIDEO_V4L2 > tristate > depends on (I2C || I2C=n) && VIDEO_DEV > select RATIONAL > select VIDEOBUF2_V4L2 if VIDEOBUF2_CORE > default (I2C || I2C=n) && VIDEO_DEV > > In the past, merging them would be tricky, but it seems that it is now > possible to merge those symbols, in order to simplify V4L dependencies. > > Let's keep VIDEO_DEV, as this one is used on some make *defconfig > configurations. > > Suggested-by: Laurent Pinchart > Signed-off-by: Mauro Carvalho Chehab > --- > drivers/input/rmi4/Kconfig | 2 +- > drivers/input/touchscreen/Kconfig | 4 +- > drivers/media/Kconfig | 3 + > drivers/media/common/saa7146/Kconfig | 2 +- > drivers/media/dvb-core/Kconfig | 2 +- > drivers/media/dvb-frontends/Kconfig | 4 +- > drivers/media/i2c/Kconfig | 250 +++++++++--------- > drivers/media/i2c/ccs/Kconfig | 2 +- > drivers/media/i2c/cx25840/Kconfig | 2 +- > drivers/media/i2c/et8ek8/Kconfig | 2 +- > drivers/media/i2c/m5mols/Kconfig | 2 +- > drivers/media/pci/Kconfig | 2 +- > drivers/media/pci/bt8xx/Kconfig | 2 +- > drivers/media/pci/cobalt/Kconfig | 2 +- > drivers/media/pci/cx18/Kconfig | 2 +- > drivers/media/pci/dt3155/Kconfig | 2 +- > drivers/media/pci/intel/ipu3/Kconfig | 2 +- > drivers/media/pci/ivtv/Kconfig | 2 +- > drivers/media/pci/meye/Kconfig | 2 +- > drivers/media/pci/saa7146/Kconfig | 6 +- > drivers/media/pci/sta2x11/Kconfig | 2 +- > drivers/media/pci/tw5864/Kconfig | 2 +- > drivers/media/pci/tw68/Kconfig | 2 +- > drivers/media/pci/tw686x/Kconfig | 2 +- > drivers/media/platform/Kconfig | 6 +- > drivers/media/platform/allegro-dvt/Kconfig | 2 +- > drivers/media/platform/am437x/Kconfig | 2 +- > drivers/media/platform/amphion/Kconfig | 2 +- > drivers/media/platform/aspeed/Kconfig | 2 +- > drivers/media/platform/atmel/Kconfig | 8 +- > drivers/media/platform/cadence/Kconfig | 4 +- > drivers/media/platform/coda/Kconfig | 2 +- > drivers/media/platform/davinci/Kconfig | 12 +- > drivers/media/platform/exynos-gsc/Kconfig | 2 +- > drivers/media/platform/exynos4-is/Kconfig | 2 +- > drivers/media/platform/intel/Kconfig | 2 +- > drivers/media/platform/marvell-ccic/Kconfig | 4 +- > drivers/media/platform/meson/ge2d/Kconfig | 2 +- > drivers/media/platform/mtk-jpeg/Kconfig | 2 +- > drivers/media/platform/mtk-mdp/Kconfig | 2 +- > drivers/media/platform/mtk-vcodec/Kconfig | 2 +- > drivers/media/platform/mtk-vpu/Kconfig | 2 +- > drivers/media/platform/nxp/Kconfig | 8 +- > drivers/media/platform/nxp/imx-jpeg/Kconfig | 2 +- > drivers/media/platform/omap/Kconfig | 2 +- > drivers/media/platform/omap3isp/Kconfig | 2 +- > drivers/media/platform/qcom/camss/Kconfig | 2 +- > drivers/media/platform/qcom/venus/Kconfig | 2 +- > drivers/media/platform/renesas/Kconfig | 12 +- > .../media/platform/renesas/rcar-vin/Kconfig | 4 +- > drivers/media/platform/rockchip/rga/Kconfig | 2 +- > .../media/platform/rockchip/rkisp1/Kconfig | 2 +- > drivers/media/platform/s3c-camif/Kconfig | 2 +- > drivers/media/platform/s5p-g2d/Kconfig | 2 +- > drivers/media/platform/s5p-jpeg/Kconfig | 2 +- > drivers/media/platform/s5p-mfc/Kconfig | 2 +- > drivers/media/platform/sti/bdisp/Kconfig | 2 +- > drivers/media/platform/sti/delta/Kconfig | 2 +- > drivers/media/platform/sti/hva/Kconfig | 2 +- > drivers/media/platform/stm32/Kconfig | 4 +- > .../media/platform/sunxi/sun4i-csi/Kconfig | 2 +- > .../media/platform/sunxi/sun6i-csi/Kconfig | 2 +- > drivers/media/platform/sunxi/sun8i-di/Kconfig | 2 +- > .../media/platform/sunxi/sun8i-rotate/Kconfig | 2 +- > drivers/media/platform/tegra/vde/Kconfig | 2 +- > drivers/media/platform/ti-vpe/Kconfig | 4 +- > drivers/media/platform/via/Kconfig | 2 +- > drivers/media/platform/xilinx/Kconfig | 2 +- > drivers/media/radio/Kconfig | 54 ++-- > drivers/media/radio/si470x/Kconfig | 2 +- > drivers/media/radio/wl128x/Kconfig | 2 +- > drivers/media/spi/Kconfig | 4 +- > drivers/media/test-drivers/Kconfig | 2 +- > drivers/media/test-drivers/vicodec/Kconfig | 2 +- > drivers/media/test-drivers/vimc/Kconfig | 2 +- > drivers/media/test-drivers/vivid/Kconfig | 2 +- > drivers/media/tuners/Kconfig | 6 +- > drivers/media/tuners/e4000.c | 6 +- > drivers/media/tuners/fc2580.c | 6 +- > drivers/media/usb/airspy/Kconfig | 2 +- > drivers/media/usb/au0828/Kconfig | 6 +- > drivers/media/usb/cpia2/Kconfig | 2 +- > drivers/media/usb/dvb-usb-v2/Kconfig | 8 +- > drivers/media/usb/dvb-usb/Kconfig | 4 +- > drivers/media/usb/gspca/Kconfig | 96 +++---- > drivers/media/usb/gspca/gl860/Kconfig | 2 +- > drivers/media/usb/gspca/m5602/Kconfig | 2 +- > drivers/media/usb/hackrf/Kconfig | 2 +- > drivers/media/usb/hdpvr/Kconfig | 2 +- > drivers/media/usb/msi2500/Kconfig | 2 +- > drivers/media/usb/pvrusb2/Kconfig | 2 +- > drivers/media/usb/pwc/Kconfig | 2 +- > drivers/media/usb/s2255/Kconfig | 2 +- > drivers/media/usb/stkwebcam/Kconfig | 2 +- > drivers/media/usb/usbtv/Kconfig | 2 +- > drivers/media/usb/uvc/Kconfig | 2 +- > drivers/media/usb/zr364xx/Kconfig | 2 +- > drivers/media/v4l2-core/Kconfig | 12 +- > drivers/media/v4l2-core/Makefile | 2 +- > drivers/staging/media/atomisp/Kconfig | 2 +- > drivers/staging/media/atomisp/i2c/Kconfig | 14 +- > drivers/staging/media/hantro/Kconfig | 2 +- > drivers/staging/media/imx/Kconfig | 2 +- > drivers/staging/media/ipu3/Kconfig | 2 +- > drivers/staging/media/max96712/Kconfig | 2 +- > drivers/staging/media/meson/vdec/Kconfig | 2 +- > drivers/staging/media/omap4iss/Kconfig | 2 +- > drivers/staging/media/rkvdec/Kconfig | 2 +- > drivers/staging/media/sunxi/cedrus/Kconfig | 2 +- > drivers/staging/media/tegra-video/Kconfig | 2 +- > drivers/staging/media/zoran/Kconfig | 2 +- > drivers/staging/most/video/Kconfig | 2 +- > .../vc04_services/bcm2835-camera/Kconfig | 2 +- > drivers/usb/gadget/Kconfig | 2 +- > drivers/usb/gadget/legacy/Kconfig | 2 +- > sound/pci/Kconfig | 4 +- > 116 files changed, 363 insertions(+), 368 deletions(-) > > diff --git a/drivers/input/rmi4/Kconfig b/drivers/input/rmi4/Kconfig > index 16119f760d11..c0163b983ce6 100644 > --- a/drivers/input/rmi4/Kconfig > +++ b/drivers/input/rmi4/Kconfig > @@ -110,7 +110,7 @@ config RMI4_F3A > > config RMI4_F54 > bool "RMI4 Function 54 (Analog diagnostics)" > - depends on VIDEO_V4L2=y || (RMI4_CORE=m && VIDEO_V4L2=m) > + depends on VIDEO_DEV=y || (RMI4_CORE=m && VIDEO_DEV=m) > select VIDEOBUF2_VMALLOC > select RMI4_F55 > help > diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig > index 2f6adfb7b938..ff7794cecf69 100644 > --- a/drivers/input/touchscreen/Kconfig > +++ b/drivers/input/touchscreen/Kconfig > @@ -131,7 +131,7 @@ config TOUCHSCREEN_ATMEL_MXT > config TOUCHSCREEN_ATMEL_MXT_T37 > bool "Support T37 Diagnostic Data" > depends on TOUCHSCREEN_ATMEL_MXT > - depends on VIDEO_V4L2=y || (TOUCHSCREEN_ATMEL_MXT=m && VIDEO_V4L2=m) > + depends on VIDEO_DEV=y || (TOUCHSCREEN_ATMEL_MXT=m && VIDEO_DEV=m) > select VIDEOBUF2_VMALLOC > help > Say Y here if you want support to output data from the T37 > @@ -1252,7 +1252,7 @@ config TOUCHSCREEN_SUN4I > config TOUCHSCREEN_SUR40 > tristate "Samsung SUR40 (Surface 2.0/PixelSense) touchscreen" > depends on USB && MEDIA_USB_SUPPORT && HAS_DMA > - depends on VIDEO_V4L2 > + depends on VIDEO_DEV > select VIDEOBUF2_DMA_SG > help > Say Y here if you want support for the Samsung SUR40 touchscreen > diff --git a/drivers/media/Kconfig b/drivers/media/Kconfig > index 01b536863657..2d02d9a44b94 100644 > --- a/drivers/media/Kconfig > +++ b/drivers/media/Kconfig > @@ -160,6 +160,9 @@ menu "Media core support" > config VIDEO_DEV > tristate "Video4Linux core" > default MEDIA_CAMERA_SUPPORT || MEDIA_ANALOG_TV_SUPPORT || MEDIA_RADIO_SUPPORT || MEDIA_SDR_SUPPORT || MEDIA_PLATFORM_SUPPORT || MEDIA_TEST_SUPPORT > + depends on (I2C || I2C=n) Is this I2C || I2C=n intentional ? > + select RATIONAL > + select VIDEOBUF2_V4L2 if VIDEOBUF2_CORE > help > Enables the V4L2 API, used by cameras, analog TV, video grabbers, > radio devices and by some input devices. > diff --git a/drivers/media/common/saa7146/Kconfig b/drivers/media/common/saa7146/Kconfig > index 3e85c0c3fd9a..a0aa155e5d85 100644 > --- a/drivers/media/common/saa7146/Kconfig > +++ b/drivers/media/common/saa7146/Kconfig > @@ -5,6 +5,6 @@ config VIDEO_SAA7146 > > config VIDEO_SAA7146_VV > tristate > - depends on VIDEO_V4L2 > + depends on VIDEO_DEV > select VIDEOBUF_DMA_SG > select VIDEO_SAA7146 > diff --git a/drivers/media/dvb-core/Kconfig b/drivers/media/dvb-core/Kconfig > index 6ffac618417b..8b3f2d53cd62 100644 > --- a/drivers/media/dvb-core/Kconfig > +++ b/drivers/media/dvb-core/Kconfig > @@ -6,7 +6,7 @@ > config DVB_MMAP > bool "Enable DVB memory-mapped API (EXPERIMENTAL)" > depends on DVB_CORE > - depends on VIDEO_V4L2=y || VIDEO_V4L2=DVB_CORE > + depends on VIDEO_DEV=y || VIDEO_DEV=DVB_CORE > select VIDEOBUF2_VMALLOC > help > This option enables DVB experimental memory-mapped API, which > diff --git a/drivers/media/dvb-frontends/Kconfig b/drivers/media/dvb-frontends/Kconfig > index 2c1ed98d43c5..4101f9b1e731 100644 > --- a/drivers/media/dvb-frontends/Kconfig > +++ b/drivers/media/dvb-frontends/Kconfig > @@ -510,7 +510,7 @@ config DVB_RTL2832 > > config DVB_RTL2832_SDR > tristate "Realtek RTL2832 SDR" > - depends on DVB_CORE && I2C && I2C_MUX && VIDEO_V4L2 && MEDIA_SDR_SUPPORT && USB > + depends on DVB_CORE && I2C && I2C_MUX && VIDEO_DEV && MEDIA_SDR_SUPPORT && USB > select DVB_RTL2832 > select VIDEOBUF2_VMALLOC > default m if !MEDIA_SUBDRV_AUTOSELECT > @@ -681,7 +681,7 @@ config DVB_AU8522_DTV > > config DVB_AU8522_V4L > tristate "Auvitek AU8522 based ATV demod" > - depends on VIDEO_V4L2 && DVB_CORE && I2C > + depends on VIDEO_DEV && DVB_CORE && I2C > select DVB_AU8522 > default m if !MEDIA_SUBDRV_AUTOSELECT > help > diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig > index e7194c1be4d2..5abc169f0a5c 100644 > --- a/drivers/media/i2c/Kconfig > +++ b/drivers/media/i2c/Kconfig > @@ -3,7 +3,7 @@ > # Multimedia Video device configuration > # > > -if VIDEO_V4L2 > +if VIDEO_DEV > > comment "IR I2C driver auto-selected by 'Autoselect ancillary drivers'" > depends on MEDIA_SUBDRV_AUTOSELECT && I2C && RC_CORE > @@ -36,7 +36,7 @@ menu "Audio decoders, processors and mixers" > > config VIDEO_TVAUDIO > tristate "Simple audio decoder chips" > - depends on VIDEO_V4L2 && I2C > + depends on VIDEO_DEV && I2C Are there symbols in drivers/media/i2c that do not depend on I2C ? Could we make the menu conditional on I2C presence ? > help > Support for several audio decoder chips found on some bt8xx boards: > Philips: tda9840, tda9873h, tda9874h/a, tda9850, tda985x, tea6300, > @@ -48,7 +48,7 @@ config VIDEO_TVAUDIO [snip] > @@ -1,7 +1,7 @@ > # SPDX-License-Identifier: GPL-2.0-only > config VIDEO_TW5864 > tristate "Techwell TW5864 video/audio grabber and encoder" > - depends on VIDEO_DEV && PCI && VIDEO_V4L2 > + depends on VIDEO_DEV && PCI && VIDEO_DEV Double VIDEO_DEV > select VIDEOBUF2_DMA_CONTIG > help > Support for boards based on Techwell TW5864 chip which provides > diff --git a/drivers/media/pci/tw68/Kconfig b/drivers/media/pci/tw68/Kconfig > index af0cb60337bb..ef29be7db493 100644 > --- a/drivers/media/pci/tw68/Kconfig > +++ b/drivers/media/pci/tw68/Kconfig > @@ -1,7 +1,7 @@ > # SPDX-License-Identifier: GPL-2.0-only > config VIDEO_TW68 > tristate "Techwell tw68x Video For Linux" > - depends on VIDEO_DEV && PCI && VIDEO_V4L2 > + depends on VIDEO_DEV && PCI && VIDEO_DEV Same here > select VIDEOBUF2_DMA_SG > help > Support for Techwell tw68xx based frame grabber boards. [snip] > diff --git a/drivers/media/platform/amphion/Kconfig b/drivers/media/platform/amphion/Kconfig > index 13899649f766..e9ddca7a9e4a 100644 > --- a/drivers/media/platform/amphion/Kconfig > +++ b/drivers/media/platform/amphion/Kconfig > @@ -5,7 +5,7 @@ config VIDEO_AMPHION_VPU > depends on ARCH_MXC || COMPILE_TEST > depends on MEDIA_SUPPORT > depends on VIDEO_DEV > - depends on VIDEO_V4L2 > + depends on VIDEO_DEV VIDEO_DEV already listed > select MEDIA_CONTROLLER > select V4L2_MEM2MEM_DEV > select VIDEOBUF2_DMA_CONTIG [snip] > > -if RADIO_ADAPTERS && VIDEO_V4L2 > +if RADIO_ADAPTERS && VIDEO_DEV > > config RADIO_TEA575X > tristate > @@ -20,13 +20,13 @@ source "drivers/media/radio/si470x/Kconfig" > > config RADIO_SI4713 > tristate "Silicon Labs Si4713 FM Radio with RDS Transmitter support" > - depends on VIDEO_V4L2 > + depends on VIDEO_DEV Isn't this menu section already conditional to VIDEO_DEV [snip] With the above minors fixed Reviewed-by: Jacopo Mondi Thanks j