RK3588: expose 4K@120Hz modes (VOP2 dclk limits)#1326
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jamautt wants to merge 2 commits intoJoshua-Riek:mainfrom
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RK3588: expose 4K@120Hz modes (VOP2 dclk limits)#1326jamautt wants to merge 2 commits intoJoshua-Riek:mainfrom
jamautt wants to merge 2 commits intoJoshua-Riek:mainfrom
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added 2 commits
December 13, 2025 08:26
Auto-apply local kernel patches during build and include VOP2 changes to allow 4K@120Hz modes (raise VOP2_MAX_DCLK_RATE and VP1/VP2 dclk_max).
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Fix: expose RK3588 4K@120Hz modes on HDMI
On RK3588, 3840x2160@120Hz (VIC 118) was not being offered to userspace because VOP2 mode validation rejects the mode due to per-video-port
dclk_maxlimits (VP1/VP2 default to 600 MHz).Even when HDMI bandwidth can be met via YCbCr 4:2:0 (TMDS ~= 594 MHz), the pixel clock remains 1188 MHz, so the VOP2
dclklimits must allow that mode.Changes
scripts/build-kernel.sh: apply local patches frompatches/kernel/seriesduring kernel buildpatches/kernel/0001: increaseVOP2_MAX_DCLK_RATEto 1200000 kHzpatches/kernel/0002: increase RK3588 VP1/VP2dclk_maxto 1200000000 HzTest
sudo env SUITE=noble ./scripts/build-kernel.sh.debpackagesdrm_infolists3840x2160@120and the mode can be selected