dmesg | grep vc4

[    5.596329] vc4-drm soc:gpu: failed to bind 3f902000.hdmi (ops vc4_hdmi_ops [vc4]): -517
[    5.604848] vc4-drm soc:gpu: master bind failed: -517
[    5.720983] vc4-drm soc:gpu: failed to bind 3f902000.hdmi (ops vc4_hdmi_ops [vc4]): -517
[    5.729778] vc4-drm soc:gpu: master bind failed: -517
[   12.754196] vc4-drm soc:gpu: failed to bind 3f902000.hdmi (ops vc4_hdmi_ops [vc4]): -517
[   12.763291] vc4-drm soc:gpu: master bind failed: -517
[   12.825381] vc4-drm soc:gpu: failed to bind 3f902000.hdmi (ops vc4_hdmi_ops [vc4]): -517
[   12.835855] vc4-drm soc:gpu: master bind failed: -517
[   12.838501] vc4-drm soc:gpu: failed to bind 3f902000.hdmi (ops vc4_hdmi_ops [vc4]): -517
[   12.850643] vc4-drm soc:gpu: master bind failed: -517
[   12.852209] vc4-drm soc:gpu: failed to bind 3f902000.hdmi (ops vc4_hdmi_ops [vc4]): -517
[   12.863468] vc4-drm soc:gpu: master bind failed: -517
[   12.870766] vc4-drm soc:gpu: failed to bind 3f902000.hdmi (ops vc4_hdmi_ops [vc4]): -517
[   12.879472] vc4-drm soc:gpu: master bind failed: -517
[   12.938612] vc4-drm soc:gpu: failed to bind 3f902000.hdmi (ops vc4_hdmi_ops [vc4]): -517
[   12.947269] vc4-drm soc:gpu: master bind failed: -517
[   12.962188] vc4-drm soc:gpu: failed to bind 3f902000.hdmi (ops vc4_hdmi_ops [vc4]): -517
[   12.970748] vc4-drm soc:gpu: master bind failed: -517
[   12.972388] vc4-drm soc:gpu: bound 3f902000.hdmi (ops vc4_hdmi_ops [vc4])
[   12.972427] vc4_dsi 3f700000.dsi: DSI not set up by firmware.
[   12.972499] vc4-drm soc:gpu: bound 3f700000.dsi (ops vc4_dsi_ops [vc4])
[   12.972581] vc4-drm soc:gpu: bound 3f400000.hvs (ops vc4_hvs_ops [vc4])
[   12.972790] vc4-drm soc:gpu: bound 3f206000.pixelvalve (ops vc4_crtc_ops [vc4])
[   12.972958] vc4-drm soc:gpu: bound 3f207000.pixelvalve (ops vc4_crtc_ops [vc4])
[   12.973113] vc4-drm soc:gpu: bound 3f807000.pixelvalve (ops vc4_crtc_ops [vc4])
[   12.973273] vc4-drm soc:gpu: bound 3fc00000.v3d (ops vc4_v3d_ops [vc4])
[   13.033874] vc4-drm soc:gpu: fb0:  frame buffer device