linux-kernel - Re: [PATCH v3 2/7] bus: mhi: core: Introduce independent voting mechanism

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Date:   Wed, 20 May 2020 11:43:03 -0700
From:   bbhatt@...eaurora.org
To:     Jeffrey Hugo <jhugo@...eaurora.org>
Cc:     manivannan.sadhasivam@...aro.org, linux-arm-msm@...r.kernel.org,
        hemantk@...eaurora.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/7] bus: mhi: core: Introduce independent voting
 mechanism

On 2020-05-20 09:54, Jeffrey Hugo wrote:
> On 5/18/2020 2:03 PM, Bhaumik Bhatt wrote:
>> Allow independent votes from clients such that they can choose to vote
>> for either the device or the bus or both. This helps in cases where 
>> the
>> device supports autonomous low power mode wherein it can move to M2
>> state without the need to notify the host. Clients can also vote only 
>> to
>> keep the underlying bus active without having the device in M0 state 
>> to
>> support offload use cases.
>> 
>> Signed-off-by: Bhaumik Bhatt <bbhatt@...eaurora.org>
>> ---
> 
> I wonder, why doesn't this fit with runtimePM?
Hi Jeff,

Can you elaborate?

In short, with this patch, MHI just wants to give controller the option 
to
choose the vote type so we can implement autonomous low power mode 
entries
on both host and device.

Let us know if you need some more information.

Thanks,
Bhaumik