Hello Sakari, while testing rcar-vin setup on top of your RFC (included in the series) that moves the framework to perform endpoint matching, I realized how hard is to follow what happens with asynchronous notifiers, sub-notifiers and sub-devices.
In order to better understand what happens and ease debug of v4l2-async operations I have introduced some dev_dbg() output, protected by a Kconfig option. Before being able to properly identify (sub-)notifiers and subdevices I had to extend fwnode_* framework to support a new .get_name() operation, and modify v4l2_async to make sure notifiers always have a valid fwnode_handle field to be identified with. I have tested this only with not yet mainlined drivers (rcar-vin, rcar-csi2, max9286) each of them performing non-trivial endpoint matching. Also I only tested this on OF based systems (not tested on ACPI). This considered, I am copying linux-media anyhow for feedbacks. Thanks j Jacopo Mondi (4): device property: Add fwnode_get_name() operation include: v4l2_async: Add 'owner' field to notifier v4l2: async: Postpone subdev_notifier registration v4l2: async: Add debug output to v4l2-async module Sakari Ailus (1): v4l: async: Use endpoint node, not device node, for fwnode match drivers/acpi/property.c | 6 + drivers/base/property.c | 12 ++ drivers/media/platform/am437x/am437x-vpfe.c | 2 +- drivers/media/platform/atmel/atmel-isc.c | 2 +- drivers/media/platform/atmel/atmel-isi.c | 2 +- drivers/media/platform/davinci/vpif_capture.c | 2 +- drivers/media/platform/exynos4-is/media-dev.c | 14 ++- drivers/media/platform/pxa_camera.c | 2 +- drivers/media/platform/qcom/camss-8x16/camss.c | 2 +- drivers/media/platform/rcar_drif.c | 2 +- drivers/media/platform/stm32/stm32-dcmi.c | 2 +- drivers/media/platform/ti-vpe/cal.c | 2 +- drivers/media/platform/xilinx/xilinx-vipp.c | 16 ++- drivers/media/v4l2-core/Kconfig | 8 ++ drivers/media/v4l2-core/v4l2-async.c | 152 +++++++++++++++++++++---- drivers/media/v4l2-core/v4l2-fwnode.c | 2 +- drivers/of/property.c | 6 + include/linux/fwnode.h | 2 + include/linux/property.h | 1 + include/media/v4l2-async.h | 4 + 20 files changed, 200 insertions(+), 41 deletions(-) -- 2.7.4
