Hi, This is v6 of the series. Previous one can be found from: https://lore.kernel.org/linux-media/20210415130450.421168-1-tomi.valkeinen@xxxxxxxxxxxxxxxx/ Changes to v5: - Dropped "v4l: mc: Add an S_ROUTING helper function for power state changes" as discussed - Added MEDIA_PAD_FL_MULTIPLEXED flag to indicate that a pad works in multiplexed mode - Documentation improvements - Renamed struct v4l2_mbus_frame_desc_entry_csi2 fields - Fixed setting routing->num_routes in G_ROUTING - Many smaller cosmetic changes as per comments One bigger topic I didn't change is the in-kernel API for get/set routing. Currently the link validation needs to get the routing tables multiple times, each leading to memory allocations (and frees). A different API would allow the link validation to peek at the routing without any allocations, but I haven't solved that yet. A simple solution would be to require a lock to be held when accessing the routing table, and making get_routing return a pointer to the driver's routing table. But this kind of API would be quite different than, say, get_fmt. Another would be to keep the API, but have a state object during link validation, which would hold preallocated routing tables, so that link validation wouldn't need to allocate new ones for each get_routing call. Anything we do here is a kernel internal change, so it's not super critical to solve it right away. Tomi Jacopo Mondi (2): media: entity: Add iterator helper for entity pads media: Documentation: Add GS_ROUTING documentation Laurent Pinchart (3): media: entity: Add has_route entity operation media: entity: Add media_entity_has_route() function media: entity: Use routing information during graph traversal Sakari Ailus (9): media: entity: Use pad as a starting point for graph walk media: entity: Use pads instead of entities in the media graph walk stack v4l: mc: Start walk from a specific pad in use count calculation media: entity: Move the pipeline from entity to pads media: entity: Use pad as the starting point for a pipeline media: entity: Skip link validation for pads to which there is no route to media: entity: Add only connected pads to the pipeline media: entity: Add debug information in graph walk route check v4l: Add stream to frame descriptor Tomi Valkeinen (10): media: entity: Walk the graph based on pads media: entity: Add an iterator helper for connected pads v4l: Add bus type to frame descriptors v4l: Add CSI-2 bus configuration to frame descriptors v4l: subdev: Add [GS]_ROUTING subdev ioctls and operations v4l: subdev: routing kernel helper functions v4l: subdev: add v4l2_subdev_get_format_dir() media: uapi: add MEDIA_PAD_FL_MULTIPLEXED flag v4l: subdev: Take routing information into account in link validation v4l: subdev: increase V4L2_FRAME_DESC_ENTRY_MAX to 8 Documentation/driver-api/media/mc-core.rst | 15 +- .../media/mediactl/media-types.rst | 6 + .../userspace-api/media/v4l/dev-subdev.rst | 125 ++++++ .../userspace-api/media/v4l/user-func.rst | 1 + .../media/v4l/vidioc-subdev-g-routing.rst | 138 +++++++ drivers/media/mc/mc-device.c | 13 +- drivers/media/mc/mc-entity.c | 241 ++++++----- drivers/media/pci/intel/ipu3/ipu3-cio2-main.c | 6 +- .../media/platform/exynos4-is/fimc-capture.c | 8 +- .../platform/exynos4-is/fimc-isp-video.c | 8 +- drivers/media/platform/exynos4-is/fimc-isp.c | 2 +- drivers/media/platform/exynos4-is/fimc-lite.c | 10 +- drivers/media/platform/exynos4-is/media-dev.c | 20 +- drivers/media/platform/omap3isp/isp.c | 2 +- drivers/media/platform/omap3isp/ispvideo.c | 25 +- drivers/media/platform/omap3isp/ispvideo.h | 2 +- .../media/platform/qcom/camss/camss-video.c | 6 +- drivers/media/platform/rcar-vin/rcar-core.c | 16 +- drivers/media/platform/rcar-vin/rcar-dma.c | 8 +- .../platform/rockchip/rkisp1/rkisp1-capture.c | 6 +- .../media/platform/s3c-camif/camif-capture.c | 6 +- drivers/media/platform/stm32/stm32-dcmi.c | 6 +- .../platform/sunxi/sun4i-csi/sun4i_dma.c | 6 +- .../platform/sunxi/sun6i-csi/sun6i_video.c | 6 +- drivers/media/platform/ti-vpe/cal-video.c | 6 +- drivers/media/platform/vsp1/vsp1_video.c | 18 +- drivers/media/platform/xilinx/xilinx-dma.c | 20 +- drivers/media/platform/xilinx/xilinx-dma.h | 2 +- .../media/test-drivers/vimc/vimc-capture.c | 6 +- drivers/media/usb/au0828/au0828-core.c | 8 +- drivers/media/v4l2-core/v4l2-ioctl.c | 25 +- drivers/media/v4l2-core/v4l2-mc.c | 43 +- drivers/media/v4l2-core/v4l2-subdev.c | 376 +++++++++++++++++- drivers/staging/media/imx/imx-media-utils.c | 8 +- drivers/staging/media/ipu3/ipu3-v4l2.c | 6 +- drivers/staging/media/omap4iss/iss.c | 2 +- drivers/staging/media/omap4iss/iss_video.c | 38 +- drivers/staging/media/omap4iss/iss_video.h | 2 +- drivers/staging/media/tegra-video/tegra210.c | 6 +- include/media/media-entity.h | 144 +++++-- include/media/v4l2-subdev.h | 107 ++++- include/uapi/linux/media.h | 1 + include/uapi/linux/v4l2-subdev.h | 48 +++ 43 files changed, 1246 insertions(+), 302 deletions(-) create mode 100644 Documentation/userspace-api/media/v4l/vidioc-subdev-g-routing.rst -- 2.25.1
