APPLIED Re: [SRU][OEM-5.6][PATCH 0/1] The DP/HDMI audio via USB-C to DP dongle or Dell Zeus adapter can't work after suspend

[Timo Aaltonen]

On 28.8.2020 5.53, Hui Wang wrote:
> BugLink: https://bugs.launchpad.net/bugs/1893290
> 
> Since this patch is CCed to stable kernel, I just sent this patch
> to oem-5.6 kernel, our oem project is waiting for this patch to
> be landed to oem-5.6 kernel first.
> 
> [Impact]
> On the Dell TGL laptop, if connecting a monitor via type-c to DP/HDMI
> adapter, we will have an audio issue, that is playing the music and
> suspend the system, after resuming back, the audio can't output from
> DP/HDMI monitor anymore.
> 
> [Fix]
> Cherry-pick a fix from upstream, this patch is verifying the needed
> converter and pin to be in the D0 state.
> 
> [Test Case]
> Connect a monitor with USB-C to DP/HDMI adapter, open the youtu.com
> and playing sth, suspend the system and resume, check if the sound
> could play the music, repeat 20 times, all work very well.
> 
> [Regression Risk]
> If this patch could introduce regression, it should be the power
> consumption regression on Intel HDMI audio, since it makes the
> converter and pin to be D0 state earlier than before. But this
> impact is very small. one converter and one pin consume very little
> power.
> 
> Kai Vehmanen (1):
>   ALSA: hda/hdmi: always check pin power status in i915 pin fixup
> 
>  sound/pci/hda/patch_hdmi.c | 1 +
>  1 file changed, 1 insertion(+)
> 

applied to oem-5.6, thanks

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