linux-kernel - Re: [Freedreno] [v1] drm/msm/dsi: save pll state before dsi host is powered off

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Message-ID: <CAOCk7NqEaJsbTwWgieXbGNN-eGFH3X0i=umMpLaLrPcB4GQzEw@mail.gmail.com>
Date:   Thu, 6 Feb 2020 07:51:44 -0700
From:   Jeffrey Hugo <jeffrey.l.hugo@...il.com>
To:     Harigovindan P <harigovi@...eaurora.org>
Cc:     "open list:DRM PANEL DRIVERS" <dri-devel@...ts.freedesktop.org>,
        MSM <linux-arm-msm@...r.kernel.org>,
        freedreno <freedreno@...ts.freedesktop.org>,
        DTML <devicetree@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Rob Clark <robdclark@...il.com>, nganji@...eaurora.org,
        Sean Paul <seanpaul@...omium.org>, kalyan_t@...eaurora.org,
        "Kristian H. Kristensen" <hoegsberg@...omium.org>
Subject: Re: [Freedreno] [v1] drm/msm/dsi: save pll state before dsi host is
 powered off

On Thu, Feb 6, 2020 at 1:52 AM Harigovindan P <harigovi@...eaurora.org> wrote:
>
> Save pll state before dsi host is powered off. Without this change
> some register values gets resetted.

The phy driver already does this.  Why is the current implementation
insufficient?

>
> Signed-off-by: Harigovindan P <harigovi@...eaurora.org>
> ---
>
> Changes in v1:
>         - Saving pll state before dsi host is powered off.
>         - Removed calling of save state in post_disable since everything
>         would be resetted and it would save only resetted values.

Removed from post_disable?  Thats not what I see in the change since
you are adding code to dsi_mgr_bridge_post_disable()