On Wed, 11 Jul 2018 13:12:01 +0200, Takashi Iwai wrote: > > And the forced runtime PM is still an issue, and this would need the > other notification mechanism than the HD-audio unsolicited event as > AMD HDMI controller doesn't honor the HD-audio WAKEEN bit. Since we had a nice "hack week" in this week at SUSE, I spent some time to write some patches for the support of the direct hotplug notification / ELD query between HD-audio and radeon/amdgpu. It re-utilizes the audio component framework for i915 but in a slightly more flexible way. The patches are found in topic/hda-acomp branch of my sound.git tree: git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git The following commits are relevant: drm/i915: Split audio component to a generic type ALSA: hda/i915: Allow delayed i915 audio component binding ALSA: hda/i915: Associate audio component with devres ALSA: hda: Make audio component support more generic ALSA: hda/hdmi: Allow audio component for AMD/ATI HDMI ALSA: hda/hdmi: Use single mutex unlock in error paths drm/radeon: Add audio component support drm/amdgpu: Add audio component support The branch should be cleanly pullable onto the latest 4.18-rc. I couldn't test amdgpu but the test with a radeon driver on an old laptop seemed working through a very quick test. Please give it a try. thanks, Takashi
