linux-kernel - Re: [PATCH] tty: serial: qcom-geni-serial: Drop the icc bw votes in suspend for console

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Date:   Tue, 14 Jul 2020 11:04:02 +0530
From:   Rajendra Nayak <rnayak@...eaurora.org>
To:     Doug Anderson <dianders@...omium.org>,
        Greg KH <gregkh@...uxfoundation.org>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Georgi Djakov <georgi.djakov@...aro.org>,
        Akash Asthana <akashast@...eaurora.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-serial@...r.kernel.org, Stephen Boyd <swboyd@...omium.org>
Subject: Re: [PATCH] tty: serial: qcom-geni-serial: Drop the icc bw votes in
 suspend for console


On 7/14/2020 6:23 AM, Doug Anderson wrote:
> Rajendra,
> 
> On Fri, Jul 10, 2020 at 5:41 AM Greg KH <gregkh@...uxfoundation.org> wrote:
>>
>> On Thu, Jul 09, 2020 at 03:07:00PM +0530, Rajendra Nayak wrote:
>>> When using the geni-serial as console, its important to be
>>> able to hit the lowest possible power state in suspend,
>>> even with no_console_suspend.
>>> The only thing that prevents it today on platforms like the sc7180
>>> is the interconnect BW votes, which we certainly don't need when
>>> the system is in suspend. So in the suspend handler mark them as
>>> ACTIVE_ONLY (0x3) and on resume switch them back to the ALWAYS tag (0x7)
>>>
>>> Signed-off-by: Rajendra Nayak <rnayak@...eaurora.org>
>>> ---
>>> Note: Patch applies on qcom for-next, which has the ICC support patches.
>>> The tag macros are currently not exported and hence the hardcoded values.
>>> Perhaps if and when https://patchwork.kernel.org/patch/11619705/ lands I
>>> can refresh this patch to use the macros.
>>
>> Feel free to take this patch through that tree.
>>
>> Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> 
> Could you post a v2?  Bjorn landed some of my geni serial patches to
> make console / kgdb work better, but then I realized that your patch
> no longer applies cleanly.  It's trivial to resolve, so hopefully a v2
> should be quick and then Bjorn can land?

Thanks, just rebased and posted the v2.

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