APPLIED(D,E): [SRU] [D/E/Unstable] [PATCH 0/3] Allow Nvidia HDA to be runtime suspended to save power

[Khaled Elmously]

On 2019-10-23 22:25:24 , Kai-Heng Feng wrote:
> BugLink: https://bugs.launchpad.net/bugs/1840835
> 
> [Impact]
> Some Nvidia graphics card has audio function in addition to video
> function. When the video function is not bound to any driver, the audio
> function can't be runtime suspended, hence preventing the power
> resources from being turned off.
> 
> [Fix]
> Allow Nvidia audio function to be runtime suspended.
> 
> [Test]
> The user reported the fix works.
> 
> [Regression Potential]
> Low. It only allows the audio function of discrete Nvidia GPU to be
> runtime suspended. Regular audio or audio function with a discrete GPU
> already bound to a driver are unaffected.
> 
> Kai-Heng Feng (2):
>   PCI: Add a helper to check Power Resource Requirements _PR3 existence
>   ALSA: hda: Allow HDA to be runtime suspended when dGPU is not bound to
>     a driver
> 
> Takashi Iwai (1):
>   PCI: Fix missing inline for pci_pr3_present()
> 
>  drivers/pci/pci.c         | 18 ++++++++++++++++++
>  include/linux/pci.h       |  2 ++
>  sound/pci/hda/hda_intel.c |  8 +++++++-
>  3 files changed, 27 insertions(+), 1 deletion(-)
> 
> -- 
> 2.17.1
> 
> 
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