Hello everyone, I've long thought the V4L2 fwnode framework requires some work (it's buggy and it does not adequately serve common needs). This set should address in particular these matters: - Most devices support a particular media bus type but the V4L2 fwnode framework was not able to use such information, but instead tried to guess the bus type with varying levels of success while drivers generally ignored the results. This patchset makes that possible --- setting a bus type enables parsing configuration for only that bus. Failing that check results in returning -ENXIO to be returned. - Support specifying default configuration. If the endpoint has no configuration, the defaults set by the driver (as documented in DT bindings) will prevail. Any available configuration will still be read from the endpoint as one could expect. A common use case for this is e.g. the number of CSI-2 lanes. Few devices support lane mapping, and default 1:1 mapping is provided in absence of a valid default or configuration read OF. - Debugging information is greatly improved. - Recognition of the differences between CSI-2 D-PHY and C-PHY. All currently supported hardware (or at least drivers) is D-PHY only, so this change is still easy. The smiapp driver is converted to use the new functionality. This patchset does not address remaining issues such as supporting setting defaults for e.g. bridge drivers with multiple ports, but with Steve Longerbeam's patchset we're much closer with that goal. I've rebased this set on top of Steve's. Albeit the two deal with the same files, there were only a few trivial conflicts. Note that I've only tested parsing endpoints for the CSI-2 bus (no parallel IF hardware). Testing in general would be beneficial: the code flows are rather convoluted and different hardware tends to excercise different flows while the use of the use of defaults has a similar effect. Comments are welcome. I've pushed the patches (including Steve's) here: <URL:https://git.linuxtv.org/sailus/media_tree.git/log/?h=v4l2-fwnode> Sakari Ailus (21): v4l: fwnode: Add debug prints for V4L2 endpoint property parsing v4l: fwnode: Use fwnode_graph_for_each_endpoint v4l: fwnode: Detect bus type correctly v4l: fwnode: The CSI-2 clock is continuous if it's not non-continuous dt-bindings: media: Specify bus type for MIPI D-PHY, others, explicitly v4l: fwnode: Add definitions for CSI-2 D-PHY, parallel and Bt.656 busses v4l: mediabus: Recognise CSI-2 D-PHY and C-PHY v4l: fwnode: Make use of newly specified bus types v4l: fwnode: Read lane inversion information despite lane numbering v4l: fwnode: Only assign configuration if there is no error v4l: fwnode: Support driver-defined lane mapping defaults v4l: fwnode: Support default CSI-2 lane mapping for drivers v4l: fwnode: Parse the graph endpoint as last v4l: fwnode: Use default parallel flags v4l: fwnode: Allow setting default parameters v4l: fwnode: Use media bus type for bus parser selection v4l: fwnode: Print bus type v4l: fwnode: Use V4L2 fwnode endpoint media bus type if set v4l: fwnode: Support parsing of CSI-2 C-PHY endpoints v4l: fwnode: Update V4L2 fwnode endpoint parsing documentation smiapp: Query the V4L2 endpoint for a specific bus type .../devicetree/bindings/media/video-interfaces.txt | 4 +- drivers/gpu/ipu-v3/ipu-csi.c | 2 +- drivers/media/i2c/adv7180.c | 2 +- drivers/media/i2c/ov2659.c | 14 +- drivers/media/i2c/ov5640.c | 4 +- drivers/media/i2c/ov5645.c | 2 +- drivers/media/i2c/ov7251.c | 4 +- drivers/media/i2c/s5c73m3/s5c73m3-core.c | 2 +- drivers/media/i2c/s5k5baf.c | 4 +- drivers/media/i2c/s5k6aa.c | 2 +- drivers/media/i2c/smiapp/smiapp-core.c | 34 +- drivers/media/i2c/soc_camera/ov5642.c | 2 +- drivers/media/i2c/tc358743.c | 28 +- drivers/media/pci/intel/ipu3/ipu3-cio2.c | 2 +- drivers/media/platform/cadence/cdns-csi2rx.c | 2 +- drivers/media/platform/cadence/cdns-csi2tx.c | 2 +- drivers/media/platform/marvell-ccic/mcam-core.c | 4 +- drivers/media/platform/marvell-ccic/mmp-driver.c | 2 +- drivers/media/platform/omap3isp/isp.c | 2 +- drivers/media/platform/pxa_camera.c | 2 +- drivers/media/platform/rcar-vin/rcar-csi2.c | 2 +- drivers/media/platform/soc_camera/soc_mediabus.c | 2 +- drivers/media/platform/stm32/stm32-dcmi.c | 2 +- drivers/media/platform/ti-vpe/cal.c | 2 +- drivers/media/v4l2-core/v4l2-fwnode.c | 510 ++++++++++++++++----- drivers/staging/media/imx/imx-media-csi.c | 2 +- drivers/staging/media/imx/imx6-mipi-csi2.c | 2 +- drivers/staging/media/imx074/imx074.c | 2 +- include/media/v4l2-fwnode.h | 33 +- include/media/v4l2-mediabus.h | 8 +- 30 files changed, 505 insertions(+), 180 deletions(-) -- 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
