Comment 33 for bug 1850876

@Ian,

Did you add dtoverlay=vc4-fkms-v3d in the config.txt?

This is the log on my board, looks like there is no error so far:

ubuntu@ubuntu:~$ uname -a
Linux ubuntu 5.3.0-1027-raspi2 #29++v3dv2 SMP Mon Jun 15 22:26:13 CST 2020 aarch64 aarch64 aarch64 GNU/Linux

ubuntu@ubuntu:~$ dmesg | grep drm
[ 3.759090] [drm] Initialized v3d 1.0.0 20180419 for fec00000.v3d on minor 0
[ 3.790362] vc4-drm soc:gpu: bound fe600000.firmwarekms (ops vc4_fkms_ops [vc4])
[ 3.798578] fb0: switching to vc4drmfb from simple
[ 3.809972] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 3.816771] [drm] No driver support for vblank timestamp query.
[ 3.822817] [drm] Setting vblank_disable_immediate to false because get_vblank_timestamp == NULL
[ 3.866028] [drm] Initialized vc4 0.0.0 20140616 for soc:gpu on minor 1
[ 3.905537] [drm:vc4_crtc_mode_set_nofb [vc4]] *ERROR* couldn't fill AVI infoframe
[ 4.031664] vc4-drm soc:gpu: fb0: vc4drmfb frame buffer device

ubuntu@ubuntu:~$ lsmod | grep v3d
v3d 73728 0
gpu_sched 40960 1 v3d
drm 516096 5 gpu_sched,drm_kms_helper,v3d,vc4

ubuntu@ubuntu:~$ ls /dev/dri/ -la
total 0
drwxr-xr-x 3 root root 120 Jun 16 12:03 .
drwxr-xr-x 15 root root 18720 Jun 16 12:04 ..
drwxr-xr-x 2 root root 100 Jun 16 12:03 by-path
crw-rw---- 1 root video 226, 0 Jun 16 12:03 card0
crw-rw---- 1 root video 226, 1 Jun 16 12:03 card1
crw-rw---- 1 root render 226, 128 Jun 16 12:03 renderD128