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

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Message-ID: <20200709152650.GI3191083@google.com>
Date:   Thu, 9 Jul 2020 08:26:50 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Rajendra Nayak <rnayak@...eaurora.org>
Cc:     bjorn.andersson@...aro.org, agross@...nel.org,
        gregkh@...uxfoundation.org, georgi.djakov@...aro.org,
        akashast@...eaurora.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
        dianders@...omium.org, swboyd@...omium.org
Subject: Re: [PATCH] tty: serial: qcom-geni-serial: Drop the icc bw votes in
 suspend for console

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>

Tested-by: Matthias Kaehlcke <mka@...omium.org>