On Mon, Oct 4, 2021 at 5:19 AM Krzysztof Hałasa <khalasa@xxxxxxx> wrote: > > Hi Saravana et al., > > FYI the patch: 6b2117ad65f1bca9ece6d4b1ee784b42701a2d86 > > of: property: fw_devlink: Add support for "resets" and "pwms" > > Allows better tracking of dependencies between devices. > > drivers/of/property.c | 4 ++++ > > breaks v4l2 video devices on an i.MX6 CPU. The /dev/video* nodes are not > created, and the drivers (async subdevicess) are "waiting": > > # cat /sys/kernel/debug/v4l2-async/pending_async_subdevices > > imx-media: > [fwnode] dev=nil, node=/soc/ipu@2400000/port@0 > [fwnode] dev=nil, node=/soc/ipu@2400000/port@1 > [fwnode] dev=nil, node=/soc/ipu@2800000/port@0 > [fwnode] dev=nil, node=/soc/ipu@2800000/port@1 > imx6-mipi-csi2: > [fwnode] dev=0-0036, node=/soc/bus@2100000/i2c@21a0000/camera@36 > ipu2_csi1_mux: > ipu1_csi0_mux: > [fwnode] dev=21dc000.mipi, node=/soc/bus@2100000/mipi@21dc000 > > Reverting the patch (or commenting the "resets" out) fixes the problem: > > # cat /sys/kernel/debug/v4l2-async/pending_async_subdevices > ipu2_csi1: > ipu2_csi0: > ipu1_csi1: > ipu1_csi0: > imx-media: > imx6-mipi-csi2: > ipu2_csi1_mux: > ipu1_csi0_mux: > > > What now? Hi Krzysztof, Can you give me the following details? 1. The dts file that corresponds to the device you are testing this on. 2. Output of <debugfs>/devices_deferred base on at least 5.15-rc4 (I added more info there recently). That should tell me all the info I need to debug this. In the end it'll essentially boil down to a reset controller driver not using device driver model to initialize the device and directly parsing the node in some kind of initcall. Thanks, Saravana > -- > Krzysztof "Chris" Hałasa > > Sieć Badawcza Łukasiewicz > Przemysłowy Instytut Automatyki i Pomiarów PIAP > Al. Jerozolimskie 202, 02-486 Warszawa
