imx7_media_csi probe deferred

[Fabio Estevam]

Hi Tim,

On Thu, Dec 21, 2023 at 10:12 PM Tim Harvey <tharvey at gateworks.com> wrote:
>
> Greetings,
>
> I'm running into an issue with Linux 6.6 (6.6.8) when compiling with
> modules where the imx7_media_csi driver probe is deferred and I'm not
> clear how to troubleshoot the cause.
>
> The board is imx8mm-venice-gw73xx-0x [1] with
> imx8mm-venice-gw73xx-0x-imx219.dtso [2] and I'm using
> arch/arm64/configs/defconfig.
>
> The kernel reports the following:
> # dmesg | egrep csi\|mipi\|imx219
> [    1.293264] i2c 2-0010: Fixed dependency cycle(s) with
> /soc at 0/bus at 32c00000/mipi-csi at 32e30000/ports/port at 0/endpoint
> [   12.001419] imx219 2-0010: supply VANA not found, using dummy regulator
> [   12.044885] imx219 2-0010: supply VDDL not found, using dummy regulator
> [   12.164308] imx7-csi 32e20000.csi: Registered csi capture as /dev/video0
> [   12.178460] imx7-csi 32e20000.csi: error -ENOTCONN: Failed to get
> remote endpoint
> [   12.200047] imx7-csi: probe of 32e20000.csi failed with error -107
> # cat /sys/kernel/debug/devices_deferred
> cpufreq-dt
> 32e30000.mipi-csi       platform: wait for supplier

I am not able to reproduce this problem.

I have just booted 6.6.8 on an imx8mm-evk and the camera is working well:

root at imx8mmevk:~# dmesg | egrep csi\|mipi\|ov56
[    0.042431] platform 32e30000.mipi-csi: Fixed dependency cycle(s)
with /soc at 0/bus at 32c00000/csi at 32e20000/port/endpoint
[    1.575489] i2c 2-003c: Fixed dependency cycle(s) with
/soc at 0/bus at 32c00000/mipi-csi at 32e30000/ports/port at 0/endpoint
[    5.514082] ov5640 2-003c: supply DOVDD not found, using dummy regulator
[    5.522453] ov5640 2-003c: supply AVDD not found, using dummy regulator
[    5.538136] ov5640 2-003c: supply DVDD not found, using dummy regulator
[    5.552376] imx-mipi-csis 32e30000.mipi-csi: lanes: 2, freq: 333000000
[    5.583661] imx7-csi 32e20000.csi: Registered csi capture as /dev/video0

root at imx8mmevk:~# cat /sys/kernel/debug/devices_deferred
root at imx8mmevk:~# zcat /proc/config.gz | egrep
VIDEO_OV5640\|VIDEO_IMX_MIPI\|VIDEO_IMX7
CONFIG_VIDEO_IMX7_CSI=m
CONFIG_VIDEO_IMX_MIPI_CSIS=m
CONFIG_VIDEO_OV5640=m