Angry HDMI-related messages in Dmesg? Do I need to worry about these?

I could not find anything googling for this. Everything seems to work, but I’m concerned anytime I get repeated lines of red text in dmesg.

[Sat Mar  6 16:16:49 2021] vc4_hdmi fef05700.hdmi: ASoC: error at snd_soc_dai_startup on fef05700.hdmi: -19
[Sat Mar  6 16:16:49 2021] vc4_hdmi fef05700.hdmi: ASoC: error at snd_soc_dai_startup on fef05700.hdmi: -19
[Sat Mar  6 16:16:49 2021] vc4_hdmi fef05700.hdmi: ASoC: error at snd_soc_dai_startup on fef05700.hdmi: -19
[Sat Mar  6 16:16:49 2021] vc4_hdmi fef05700.hdmi: ASoC: error at snd_soc_dai_startup on fef05700.hdmi: -19
[Sat Mar  6 16:16:49 2021] vc4_hdmi fef05700.hdmi: ASoC: error at snd_soc_dai_startup on fef05700.hdmi: -19
[Sat Mar  6 16:17:02 2021] vc4_hdmi fef05700.hdmi: ASoC: error at snd_soc_dai_startup on fef05700.hdmi: -19
[Sat Mar  6 16:17:02 2021] vc4_hdmi fef05700.hdmi: ASoC: error at snd_soc_dai_startup on fef05700.hdmi: -19
[Sat Mar  6 16:17:02 2021] vc4_hdmi fef05700.hdmi: ASoC: error at snd_soc_dai_startup on fef05700.hdmi: -19
[Sat Mar  6 16:17:02 2021] vc4_hdmi fef05700.hdmi: ASoC: error at snd_soc_dai_startup on fef05700.hdmi: -19
[Sat Mar  6 16:17:02 2021] vc4_hdmi fef05700.hdmi: ASoC: error at snd_soc_dai_startup on fef05700.hdmi: -19

I have an HDMI dummy plug in HDMI0 to force the Pi to start Xorg in headless mode, and have also set hdmi_force_hotplug=1 in my /boot/config.txt.

Should I be worried about this?

No worries. Pretty sure they are because you do not have a monitor connected to the second hdmi port. I no longer see those message with 5.11.0-3

Oh, good. I have the same kernel as you, but I also have hdmi_force_hotplug=1 set to true. Maybe that’s it.