Hi folks, We have a large influx of new, unmerged, drivers that are now parsing fwnode endpoints and each one of them is doing this a little bit differently. The needs are still exactly the same for the graph data structure is device independent. This is still a non-trivial task and the majority of the driver implementations are buggy, just buggy in different ways. Facilitate parsing endpoints by adding a convenience function for parsing the endpoints, and make the omap3isp and rcar-vin drivers use them as an example. To show where we're getting with this, I've added support for async sub-device notifier support that is notifiers that can be registered by sub-device drivers as well as V4L2 fwnode improvements to make use of them and the DTS changes for the Nokia N9. Some of these patches I've posted previously in this set here: <URL:http://www.spinics.net/lists/linux-media/msg118764.html> Since that, the complete callback of the master notifier registering the V4L2 device is only called once all sub-notifiers have been completed as well. This way the device node creation can be postponed until all devices have been successfully initialised. With this, the as3645a driver successfully registers a sub-device to the media device created by the omap3isp driver. The kernel also has the information it's related to the sensor driven by the smiapp driver but we don't have a way to expose that information yet. since v7: - Added three more patches: v4l: async: Remove re-probing support v4l: async: Use more intuitive names for internal functions dt: bindings: smiapp: Document lens-focus and flash properties The last one was already sent previously after the rest of the patchset. - Removed re-probing support. This is hard to support and only useful in special cases. It can be reintroduced later on if there's really a need --- note that in e.g. omap3isp this was always broken and no-one ever complained. - Remove smiapp driver's async complete callback (and ops). It is redundant: the sub-device nodes are created through the master notifier. - Improve flash property documentation in video-interfaces.txt. - Introduce helper functions to call notifier operations, one for each operation. - Rename v4l2_async_test_notify as v4l2_async_match_notify and v4l2_async_belongs to v4l2_async_find_match. - v4l2_async_notifier_test_all_subdevs() renamed as v4l2_async_notifier_try_all_subdevs(). - Made notifier_v4l2_dev a function (it was a macro). - Registering subdev notifiers from sub-device drivers that control sub-devices created through sub-notifiers is now supported. In other words, subdev notifiers may be registered through other subdev notifiers. This is the source of the bulk of the changes between v7 and v8. - Add explanatory comments to helper functions used by V4L2 async framework. This should help understanding the internal workings of the framework. - Removed the "notifiers" list in struct v4l2_async_notifier. The information can be found from existing data structures. - Explicitly check that registering a non-subdev notifier has v4l2_dev and a subdev notifier has a sub-device pointer. - Unified several code paths between subdev notifiers and non-subdev notifiers. - Fixed v4l2_async_notifier_release() --- calling it on a notifier for which the driver had allocated the subdevs array would lead calling kvfree() on that array. Now notifier->max_subdevs is checked before proceeding. - Fixed a use-after-free issue in v4l2_async_notifier_fwnode_parse_endpoints(). - Small fixes to KernelDoc documentation for v4l2_async_notifier_parse_fwnode_endpoints(). since v6: - Drop the last patch that added variant for parsing endpoints given specific port and endpoints numbers. - Separate driver changes from the fwnode endpoint parser patch into two patches. rcar-vin driver is now using the name function. - Use -ENOTCONN to tell the parser that and endpoint (or a reference) is to be ignored. - parse_endpoint and parse_single callback functions are now optional and documented as such. - Added Laurent's patch adding notifier operations struct which I rebase on the fwnode parser patchset. I wrote another patch to call the notifier operations through macros. - Add DT bindings for flash and lens devices. - V4L2 fwnode parser for references (such as flash and lens). - Added smiapp driver support for async sub-devices (lens and flash). - Added a few fixes for omap3isp. since v5: - Use v4l2_async_ prefix for static functions as well (4th patch) - Use memcpy() to copy array rather than a loop - Document that the v4l2_async_subdev pointer in driver specific struct must be the first member - Improve documentation of the added functions (4th and 5th patches) - Arguments - More thorough explation of the purpose, usage and object lifetime - Added acks since v4: - Prepend the set with three documentation fixes. - The driver's async struct must begin with struct v4l2_async_subdev. Fix this for omap3isp and document it. - Improve documentation for new functions. - Don't use devm_ family of functions for allocating memory. Introduce v4l2_async_notifier_release() to release memory resources. - Rework both v4l2_async_notifier_fwnode_parse_endpoints() and v4l2_async_notifier_fwnode_parse_endpoint() and the local functions they call. This should make the code cleaner. Despite the name, for linking and typical usage reasons the functions remain in v4l2-fwnode.c. - Convert rcar-vin to use v4l2_async_notifier_fwnode_parse_endpoint(). - Use kvmalloc() for allocating the notifier's subdevs array. - max_subdevs argument for notifier_realloc is now the total maximum number of subdevs, not the number of available subdevs. - Use fwnode_device_is_available() to make sure the device actually exists. - Move the note telling v4l2_async_notifier_fwnode_parse_endpoints() should not be used by new drivers to the last patch adding v4l2_async_notifier_fwnode_parse_endpoint(). since v3: - Rebase on current mediatree master. since v2: - Rebase on CCP2 support patches. - Prepend a patch cleaning up omap3isp driver a little. since v1: - The first patch has been merged (it was a bugfix). - In anticipation that the parsing can take place over several iterations, take the existing number of async sub-devices into account when re-allocating an array of async sub-devices. - Rework the first patch to better anticipate parsing single endpoint at a time by a driver. - Add a second patch that adds a function for parsing endpoints one at a time based on port and endpoint numbers. Laurent Pinchart (1): v4l: async: Move async subdev notifier operations to a separate structure Sakari Ailus (20): v4l: fwnode: Move KernelDoc documentation to the header v4l: async: Remove re-probing support v4l: async: Use more intuitive names for internal functions v4l: async: Add V4L2 async documentation to the documentation build docs-rst: v4l: Include Qualcomm CAMSS in documentation build v4l: fwnode: Support generic parsing of graph endpoints in a device omap3isp: Use generic parser for parsing fwnode endpoints rcar-vin: Use generic parser for parsing fwnode endpoints omap3isp: Fix check for our own sub-devices omap3isp: Print the name of the entity where no source pads could be found v4l: async: Introduce helpers for calling async ops callbacks v4l: async: Register sub-devices before calling bound callback v4l: async: Allow binding notifiers to sub-devices dt: bindings: Add a binding for flash devices associated to a sensor dt: bindings: Add lens-focus binding for image sensors v4l: fwnode: Add convenience function for parsing generic references v4l: fwnode: Add convenience function for parsing common external refs smiapp: Add support for flash and lens devices dt: bindings: smiapp: Document lens-focus and flash properties arm: dts: omap3: N9/N950: Add flash references to the camera .../devicetree/bindings/media/i2c/nokia,smia.txt | 2 + .../devicetree/bindings/media/video-interfaces.txt | 10 + Documentation/media/kapi/v4l2-async.rst | 3 + Documentation/media/kapi/v4l2-core.rst | 1 + Documentation/media/v4l-drivers/index.rst | 1 + arch/arm/boot/dts/omap3-n9.dts | 1 + arch/arm/boot/dts/omap3-n950-n9.dtsi | 4 +- arch/arm/boot/dts/omap3-n950.dts | 1 + drivers/media/i2c/smiapp/smiapp-core.c | 18 +- drivers/media/i2c/smiapp/smiapp.h | 4 +- drivers/media/platform/am437x/am437x-vpfe.c | 8 +- drivers/media/platform/atmel/atmel-isc.c | 10 +- drivers/media/platform/atmel/atmel-isi.c | 10 +- drivers/media/platform/davinci/vpif_capture.c | 8 +- drivers/media/platform/davinci/vpif_display.c | 8 +- drivers/media/platform/exynos4-is/media-dev.c | 8 +- drivers/media/platform/omap3isp/isp.c | 127 +++----- drivers/media/platform/omap3isp/isp.h | 5 +- drivers/media/platform/pxa_camera.c | 8 +- drivers/media/platform/qcom/camss-8x16/camss.c | 8 +- drivers/media/platform/rcar-vin/rcar-core.c | 122 +++----- drivers/media/platform/rcar-vin/rcar-dma.c | 10 +- drivers/media/platform/rcar-vin/rcar-v4l2.c | 14 +- drivers/media/platform/rcar-vin/rcar-vin.h | 4 +- drivers/media/platform/rcar_drif.c | 10 +- drivers/media/platform/soc_camera/soc_camera.c | 14 +- drivers/media/platform/stm32/stm32-dcmi.c | 10 +- drivers/media/platform/ti-vpe/cal.c | 8 +- drivers/media/platform/xilinx/xilinx-vipp.c | 8 +- drivers/media/v4l2-core/v4l2-async.c | 326 ++++++++++++++------ drivers/media/v4l2-core/v4l2-fwnode.c | 327 ++++++++++++++++----- drivers/staging/media/imx/imx-media-dev.c | 8 +- include/media/v4l2-async.h | 68 ++++- include/media/v4l2-fwnode.h | 165 ++++++++++- 34 files changed, 934 insertions(+), 405 deletions(-) create mode 100644 Documentation/media/kapi/v4l2-async.rst -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
