RPi 3 Mod. B+ vc4-kms-v3d: vc4-drm soc:gpu: [drm] *ERROR* Timed out waiting for commit

[raoulbhatia]

Similar to #1648 and similar reports, I have display issues with dtoverlay=vc4-kms-v3d on my Raspberry Pi 3 Model B Plus Rev 1.3.

Switching back to dtoverlay=vc4-fkms-v3d (fkms!) makes the RPi boot successfully.

My issue is with recent LibreELEC builds. But given the other bug reports, I figured it is OK to file the issue here.

To reproduce
Install LibreELEC-RPi2.arm-11.0-nightly-20220101-0e04fbf.tar from https://test.libreelec.tv/

Expected behaviour

1. System boots
2. Kodi starts
3. Kodi home screen is displayed

Actual behaviour

1. System is stuck at "LibreELEC boot screen" (i.e. showing waiting for network).
2. System is reachable over the network.

dmesg excerpt

[ 1302.693532] [drm:drm_atomic_helper_wait_for_flip_done] *ERROR* [CRTC:72:crtc-3] flip_done timed out
[ 1312.934063] [drm:drm_crtc_commit_wait] *ERROR* flip_done timed out
[ 1312.934121] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CRTC:72:crtc-3] commit wait timed out
[ 1322.961226] [drm:drm_crtc_commit_wait] *ERROR* flip_done timed out
[ 1322.961284] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [PLANE:73:plane-4] commit wait timed out
[ 1332.988372] [drm:drm_crtc_commit_wait] *ERROR* flip_done timed out
[ 1332.988434] vc4-drm soc:gpu: [drm] *ERROR* Timed out waiting for commit

The mentioned workarounds i.e. adding video=HDMI-A-1:1920x1080M@60 to cmdline.txt do not work.

The only solution is to switch back to dtoverlay=vc4-fkms-v3d (fkms!)

System
FYI raspinfo not available on LibreELEC.

Raspberry Pi 3 Model B Plus Rev 1.3 directly connected to a Samsung 43" QLED 4K Q60T (2020) (identified as "PC").

# vcgencmd version
Dec  1 2021 11:48:58
Copyright (c) 2012 Broadcom
version be18b6271a0f99f896fc81249da5da6658422558 (clean) (release) (start_x)

# uname -a
Linux LibreELEC 5.15.10 #1 SMP Sat Jan 1 17:25:10 CET 2022 armv7l GNU/Linux

# find /sys/devices/platform/ -name edid
/sys/devices/platform/soc/soc:gpu/drm/card0/card0-Writeback-1/edid
/sys/devices/platform/soc/soc:gpu/drm/card0/card0-HDMI-A-1/edid

# cat '/sys/devices/platform/soc/soc:gpu/drm/card0/card0-HDMI-A-1/edid' | openssl base64
AP///////wBMLRZwAA4AAQEeAQOAXzZ4Cqgzq1BFpScNSEi974BxT4HAgQCBgJUA
qcCzANHABHQAMPJwWoCwWIoAUB10AAAeVl4AoKCgKVAwIDUAUB10AAAaAAAA/QAY
Sw9RHgAKICAgICAgAAAA/ABTQU1TVU5HCiAgICAgAVoCA07wUl8QHwQTBRQgISJd
XmJkBxYDEiwJBwcVB1BXBwBnVACDAQAA4gBP4wUDAW4DDAAgALg8IACAAQIDBOMG
DQHlDmBhZWblAYuEkAECOoAYcTgtQFgsRQBQHXQAAB4AAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAARQ==

Logs
See above.

[pelwell]

Possibly related to raspberrypi/linux#4808

[raoulbhatia]

I can confirm this issue is resolved on the latest LibreELEC 11 build that incorporates the change from raspberrypi/linux#4808 (Kernel 5.15.13 for RPi)

LibreELEC (community): nightly-20220107-00c51c7 (RPi2.arm)

LibreELEC:~ # uname -a
Linux LibreELEC 5.15.13 #1 SMP Fri Jan 7 15:26:42 CET 2022 armv7l GNU/Linux

LibreELEC:~ # cat /flash/cmdline.txt
boot=/dev/mmcblk0p1 disk=/dev/mmcblk0p2 quiet video=HDMI-A-1:1920x1080M@60

LibreELEC:~ # grep vc4-kms-v3d /flash/distroconfig.txt
dtoverlay=vc4-kms-v3d

Feel free to close this issue.

[raoulbhatia]

Thanks @popcornmix 🇬🇧