Re: 答复: 答复: [alsa-devel] 答复: [PATCH] vgaswitchroo: set audio client id according to bound gpu client id

[jimqu]

在 2018/7/13 23:07, Takashi Iwai 写道:
> 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.

That is really wonderful work. I will check it on our AMD platform. BTW, 
For display, AMD has moved to use DC to support new asics. so there also 
need a patch for amdgpu in DC code.

Thanks
JimQu
>
> thanks,
>
> Takashi