vc4: HDMI Sink doesn't support RGB, something's wrong.

[Stefan Wahren]

Hi,

i recently switch for my suspend2idle tests from Raspberry Pi Bullseye
to Bookworm. After that testing suspend2idle shows a new warning which i
never saw before:

HDMI Sink doesn't support RGB, something's wrong.

Platform: Raspberry Pi 3 B+
Kernel: 6.12-rc1
Kernel config: arm/multi_v7_defconfig

I applied this downstream patch [1], but this doesn't help. Any ideas?


[1] -
https://github.com/raspberrypi/linux/commit/2559eae8cf2c060c7bb873209792077f20414fac

[  272.263134] PM: suspend entry (s2idle)
[  272.983317] Filesystems sync: 0.720 seconds
[  273.248665] Freezing user space processes
[  273.250547] Freezing user space processes completed (elapsed 0.001
seconds)
[  273.250574] OOM killer disabled.
[  273.250579] Freezing remaining freezable tasks
[  273.251774] Freezing remaining freezable tasks completed (elapsed
0.001 seconds)
[  274.267355] ieee80211 phy0: brcmf_fil_cmd_data: bus is down. we have
nothing to do.
[  274.267372] ieee80211 phy0: brcmf_cfg80211_get_tx_power: error (-5)
[  290.989948] brcmfmac: brcmf_fw_alloc_request: using
brcm/brcmfmac43455-sdio for chip BCM4345/6
[  291.127611] brcmfmac: brcmf_c_process_txcap_blob: no txcap_blob
available (err=-2)
[  291.127974] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4345/6 wl0:
Apr 15 2021 03:03:20 version 7.45.234 (4ca95bb CY) FWID 01-996384e2
[  291.193655] OOM killer enabled.
[  291.193674] Restarting tasks ... done.
[  291.195010] random: crng reseeded on system resumption
[  291.203671] PM: suspend exit
[  291.209085] lan78xx 1-1.1.1:1.0 eth0: Link is Down
[  291.243499] vc4-drm soc:gpu: [drm] HDMI Sink doesn't support RGB,
something's wrong.
[  291.270561] vc4-drm soc:gpu: [drm] HDMI Sink doesn't support RGB,
something's wrong.
[  291.336887] vc4-drm soc:gpu: [drm] HDMI Sink doesn't support RGB,
something's wrong.
[  293.637295] lan78xx 1-1.1.1:1.0 eth0: Link is Up - 1Gbps/Full - flow
control rx/tx