linux-dev/drivers/staging/media/max96712, branch master

i2c: Make remove callback return void

2022-08-16T10:46:26Z

The value returned by an i2c driver's remove function is mostly ignored. (Only an error message is printed if the value is non-zero that the error is ignored.) So change the prototype of the remove function to return no value. This way driver authors are not tempted to assume that passing an error to the upper layer is a good idea. All drivers are adapted accordingly. There is no intended change of behaviour, all callbacks were prepared to return 0 before. Reviewed-by: Peter Senna Tschudin Reviewed-by: Jeremy Kerr Reviewed-by: Benjamin Mugnier Reviewed-by: Javier Martinez Canillas Reviewed-by: Crt Mori Reviewed-by: Heikki Krogerus Acked-by: Greg Kroah-Hartman Acked-by: Marek Behún # for leds-turris-omnia Acked-by: Andy Shevchenko Reviewed-by: Petr Machata # for mlxsw Reviewed-by: Maximilian Luz # for surface3_power Acked-by: Srinivas Pandruvada # for bmc150-accel-i2c + kxcjk-1013 Reviewed-by: Hans Verkuil # for media/* + staging/media/* Acked-by: Miguel Ojeda # for auxdisplay/ht16k33 + auxdisplay/lcd2s Reviewed-by: Luca Ceresoli # for versaclock5 Reviewed-by: Ajay Gupta # for ucsi_ccg Acked-by: Jonathan Cameron # for iio Acked-by: Peter Rosin # for i2c-mux-*, max9860 Acked-by: Adrien Grassein # for lontium-lt8912b Reviewed-by: Jean Delvare # for hwmon, i2c-core and i2c/muxes Acked-by: Corey Minyard # for IPMI Reviewed-by: Vladimir Oltean Acked-by: Dmitry Torokhov Acked-by: Sebastian Reichel # for drivers/power Acked-by: Krzysztof Hałasa Signed-off-by: Uwe Kleine-König Signed-off-by: Wolfram Sang

media: Kconfig: cleanup VIDEO_DEV dependencies

2022-03-18T04:58:35Z

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 Reviewed-by: Laurent Pinchart Reviewed-by: Jacopo Mondi Reviewed-by: Neil Armstrong # for meson-vdec & meson-ge2d Acked-by: Andrzej Pietrasiewicz Acked-by: Łukasz Stelmach Signed-off-by: Mauro Carvalho Chehab

media: v4l2-fwnode: Move bus config structure to v4l2_mediabus.h

2022-01-28T14:52:41Z

To prepare for usage of the v4l2_fwnode_bus_* data structures to describe bus configuration in the subdev .get_mbus_config() operation, rename the structures with a v4l2_mbus_config_ prefix instead of v4l2_fwnode_bus_, and move them to v4l2_mediabus.h. Signed-off-by: Laurent Pinchart Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab

media: staging: max96712: Constify static v4l2_subdev_ops

2021-12-14T14:09:14Z

The only usage of max96712_subdev_ops is to pass its address to v4l2_i2c_subdev_init() which takes a pointer to const struct v4l2_subdev_ops as argument. Make it const to allow the compiler to put it in read-only memory. Link: https://lore.kernel.org/linux-media/20211127094945.27985-1-rikard.falkeborn@gmail.com Signed-off-by: Rikard Falkeborn Reviewed-by: Niklas S\xF6derlund Reviewed-by: Kieran Bingham Signed-off-by: Mauro Carvalho Chehab

media: max96712: Depend on VIDEO_V4L2

2021-12-14T14:09:13Z

Depend on VIDEO_V4L2 for the driver actually depends on it, failing to compile otherwise. Signed-off-by: Sakari Ailus Reviewed-by: Kieran Bingham Reviewed-by: Niklas Söderlund Signed-off-by: Mauro Carvalho Chehab

media: staging: max96712: Add basic support for MAX96712 GMSL2 deserializer

2021-11-15T08:11:43Z

Add basic support for Maxim MAX96712 quad GMSL2 deserializers. The driver is capable of powering on the device and configuring the MIPI CSI-2 bus in a DPHY 4-lane configuration as well as operating the internal VTG (Video Timing Generator) and VPG (Video Pattern Generator). Using these features the driver is able to act as a 1080p @ 30 fps V4L2 video source. Producing either a checkerboard or gradient pattern on the CSI-2 bus, selectable thru a V4L2 control. While the driver is useful as-is and have been used to prove the correct operation of the MAX96712 itself and "downstream" devices using the MAX96712 as a video source there are a lot of features missing. Most notably the ability to operate the GMSL bus. Signed-off-by: Niklas Söderlund Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab