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AMD HDMI audio is completely broken on all kernels 6.19+ due to a missing dcn10_dio_construct() call that leaves AFMT HDMI memory unpowered. The root cause has been bisected and a fix reviewed by Alex Deucher has been submitted to amd-gfx.
Affected: Multiple AMD GPU generations confirmed (Navi 48/9070 XT, Lucienne, Cezanne, Renoir) Working: kernel 6.18 LTS only Broken: 6.19, 7.0.x, 7.1-rc3 confirmed
Bad commit: b82f0759346617b2cb84d8cc2d4a179795d4efd0 Fix: https://lore.kernel.org/all/20260323211343.263909-1-sunlightlinux@gmail.com/ Upstream issue: https://gitlab.freedesktop.org/drm/amd/-/work_items/5052
Please cherry-pick this fix into linux-cachyos. Many users are affected.
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