linux-dev/drivers/media/v4l2-core/Makefile, branch master

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: Makefiles: sort entries where it fits

2022-03-14T08:42:59Z

Alphabetically sort entries at the Makefiles per group, in ASCII order, e. g., using the output of: $ LC_ALL=C sort Makefile |grep obj-y ... $ LC_ALL=C sort Makefile |grep obj.*CONFIG ... Reviewed-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab

media: Add VP9 v4l2 library

2021-11-22T07:47:13Z

Provide code common to vp9 drivers in one central location. Signed-off-by: Andrzej Pietrasiewicz Signed-off-by: Ezequiel Garcia Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: v4l: async, fwnode: Improve module organisation

2021-06-02T09:46:27Z

The V4L2 async framework is generally used with the V4L2 fwnode, which also depends on the former. There are a few exceptions but they are relatively few. At the same time there is a vast number of systems that need videodev module, but have no use for v4l2-async that's now part of videodev. In order to improve, split the v4l2-async into its own module. Selecting V4L2_FWNODE also selects V4L2_ASYNC. This also moves the initialisation of the debufs entries for async subdevs to loading of the v4l2-async module. The directory is named as "v4l2-async". Signed-off-by: Sakari Ailus Reviewed-by: Ezequiel Garcia Signed-off-by: Mauro Carvalho Chehab

media: v4l2-ctrls: split up into four source files

2021-05-25T15:03:29Z

The v4l2-ctrls.c source has become much too big, so split it up into four separate parts: v4l2-ctrls-core.c: contains the core framework code v4l2-ctrls-api.c: contains the uAPI interface to the framework v4l2-ctrls-defs.c: contains the control definitions v4l2-ctrls-request.c: contains the Request API helpers And it adds a new v4l2-ctrls-priv.h. No code was changed, but a number of checkpatch.pl warnings were fixed (alignment, f == NULL -> !f, long comment block coding style, unsigned -> unsigned int). The copyright statements were updated as well since they were quite out of date. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: Remove the legacy v4l2-clk API

2021-02-06T08:39:44Z

The V4L2 temporary clock helper API, was introduced in late 2012 and, as mentioned in the documentation, meant to be replaced by the generic clock API, once the generic clock framework became available on all relevant architectures. The generic clock API is a well-established API (since a few years now). The last few media capture drivers and sensors using v4l2-clk have been converted to the generic clock framework. We can now remove the v4l2-clk API. Signed-off-by: Ezequiel Garcia Acked-by: Petr Cvek Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab

media: v4l2-core: Add helpers to build the H264 P/B0/B1 reflists

2020-04-21T11:46:40Z

Building those list is a standard procedure described in section '8.2.4 Decoding process for reference picture lists construction' of the H264 specification. We already have 2 drivers needing the same logic (hantro and rkvdec) and I suspect we will soon have more. Let's provide generic helpers to create those lists. Signed-off-by: Boris Brezillon Signed-off-by: Ezequiel Garcia Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: add v4l2 JPEG helpers

2020-04-14T09:47:47Z

Add helpers for JPEG header parsing. They allow both scanning for marker segment positions and later parsing the segments individually, as required by s5p-jpeg, as well as parsing all headers in one go, as required by coda-vpu. The frame header is always parsed, as basically all decoders are interested in width, height, and number of components. For convenience, the JPEG chroma subsampling factors are decoded into a v4l2_jpeg_chroma_subsampling enum. Only baseline and extended sequential DCT encoded JPEGs with 8-bit or 12-bit precision with up to four components are supported. Signed-off-by: Philipp Zabel Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: v4l2-core: move i2c helpers out of v4l2-common.c

2019-08-26T13:50:48Z

Separate the i2c helpers to v4l2-i2c.c, in order to get rid of the ifdefery. No functional changes intended, this is just a cosmetic change to organize the code better. Given I2C is a tristate symbol, a hidden boolean symbol is introduced, to make the conditional build easier. Signed-off-by: Ezequiel Garcia Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: v4l2-core: move spi helpers out of v4l2-common.c

2019-08-26T13:49:12Z

Separate the spi helpers to v4l2-spi.c, in order to get rid of the ifdefery. No functional changes intended, this is just a cosmetic change to organize the code better. Signed-off-by: Ezequiel Garcia Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab