linux-kernel - Re: [v1] drm/msm/disp/dpu1: icc path needs to be set before dpu runtime resume

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Message-ID: <CAF6AEGtkMD19ZFbs7TxQ6wVn-DMgHQbpDokwRvkL1wTgqMK2ZA@mail.gmail.com>
Date:   Mon, 22 Mar 2021 18:58:01 -0700
From:   Rob Clark <robdclark@...il.com>
To:     Matthias Kaehlcke <mka@...omium.org>
Cc:     Kalyan Thota <kalyan_t@...eaurora.org>, y@...lcomm.com,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        freedreno <freedreno@...ts.freedesktop.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Kalyan Thota <kalyant@...eaurora.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Douglas Anderson <dianders@...omium.org>,
        Krishna Manikandan <mkrishn@...eaurora.org>, hywu@...gle.com,
        midean@...gle.com
Subject: Re: [v1] drm/msm/disp/dpu1: icc path needs to be set before dpu
 runtime resume

On Mon, Mar 22, 2021 at 5:44 PM Matthias Kaehlcke <mka@...omium.org> wrote:
>
> On Mon, Mar 22, 2021 at 02:17:12AM -0700, Kalyan Thota wrote:
> > From: Kalyan Thota <kalyant@...eaurora.org>
> >
> > DPU runtime resume will request for a min vote on the AXI bus as
> > it is a necessary step before turning ON the AXI clock.
> >
> > The change does below
> > 1) Move the icc path set before requesting runtime get_sync.
> > 2) remove the dependency of hw catalog for min ib vote
> > as it is initialized at a later point.
> >
> > Signed-off-by: Kalyan Thota <kalyan_t@...eaurora.org>
>
> Confirmed that this fixes a bunch of warnings at boot on SC7180 when
> (out-of-tree) camera support is enabled:
>
>   [    1.832228] gcc_disp_hf_axi_clk status stuck at 'off'
>   [    2.118292] gcc_disp_hf_axi_clk status stuck at 'off'
>   [    2.442383] gcc_disp_hf_axi_clk already disabled
>   [    2.750054] gcc_disp_hf_axi_clk already unprepared
>   [    3.154835] gcc_disp_hf_axi_clk already disabled
>   [    3.421835] gcc_disp_hf_axi_clk already unprepared
>
> Tested-by: Matthias Kaehlcke <mka@...omium.org>

thanks for testing on the setup which had this issue.. I've pushed to msm-next

BR,
-R