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SubjectAw: Re: BUG: MTK DRM/HDMI broken on 5.13 (mt7623/bpi-r2)

i've found it :)

hdmi-problem is caused by

commit 440147639ac79f699a4eb9811d0bc39d3cc815f4
Author: CK Hu <>
Date: Wed Mar 17 19:17:10 2021 +0100

soc: mediatek: mmsys: Use an array for setting the routing registers

but i cannot revert it alone, but after reverting all mmsys-patches hdmi works (ovl irq-handler called)

$ git logone v5.12..v5.13-rc1 -- drivers/ | grep 'mtk\|mediatek' | grep mmsys
060f7875bd23 2021-04-05 soc: mediatek: mmsys: Add support for MT8167 SoC
1ff1270fca33 2021-03-30 soc: mediatek: mmsys: Add mt8183 mmsys routing table
440147639ac7 2021-03-17 soc: mediatek: mmsys: Use an array for setting the routing registers
ce15e7faa2fc 2021-03-17 soc: mediatek: mmsys: Create struct mtk_mmsys to store context data

git revert 060f7875bd23 1ff1270fca33 440147639ac7 ce15e7faa2fc

and after reapplying them one-by-one it stops working on commit above (440147639ac7)

@Dafna can you confirm it solves your issue too?

btw. watchdog issue is caused by

commit bbece05c0d3a96817483e0b249ad1e302ba95117
watchdog: mtk_wdt: Remove mtk_wdt_stop() in probe() to prevent the system freeze and it doesn't reboot by watchdog problem

have already contacted author

regards Frank

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