linux-kernel - Re: [PATCH] Revert "FROMGIT: drm/msm/dsi: move DSI host powerup to modeset time"

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Message-ID: <CAD=FV=XA6GKjdvc1YNh7v0SHSMCzgBtx453AKPjxbWWkTW5N1Q@mail.gmail.com>
Date:   Wed, 11 May 2022 16:13:14 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     Dave Stevenson <dave.stevenson@...pberrypi.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Matt Turner <msturner@...gle.com>, Sean Paul <sean@...rly.run>,
        Stephen Boyd <swboyd@...omium.org>,
        Vinod Koul <vkoul@...nel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        freedreno <freedreno@...ts.freedesktop.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Revert "FROMGIT: drm/msm/dsi: move DSI host powerup to
 modeset time"

Hi,

On Wed, May 11, 2022 at 4:07 PM Douglas Anderson <dianders@...omium.org> wrote:
>
> This reverts commit c7e4a2a72e696aa6aed2c8b651279f491bb096fe.
>
> The patch causes sc7180 Chromebooks that use the parade-ps8640 bridge
> chip to fail to turn the display back on after it turns off.
>
> Let's revert to get these devices back to a working state. It seems
> like the DSI powerup problem is somewhat common and probably we should
> land something more general like Dave Stevenson's series [1] that
> would give more flexibility.
>
> [1] https://lore.kernel.org/r/cover.1646406653.git.dave.stevenson@raspberrypi.com
>
> Fixes: c7e4a2a72e69 ("FROMGIT: drm/msm/dsi: move DSI host powerup to modeset time")
> Signed-off-by: Douglas Anderson <dianders@...omium.org>
> ---
>
>  drivers/gpu/drm/msm/dsi/dsi_manager.c | 43 ++++++++-------------------
>  1 file changed, 12 insertions(+), 31 deletions(-)

Well, that's embarrassing. I clearly reverted the wrong copy of this
patch. Sorry. v2 coming right up.