linux-kernel - Re: [PATCH v3 0/3] drm/panel-edp: remove several legacy compatibles used by the driver

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Message-ID: <CAD=FV=XMgAnaEaHXZJL57+66OXs0afP9vurxf_ffqkum=xqEfA@mail.gmail.com>
Date: Thu, 30 May 2024 16:16:35 -0700
From: Doug Anderson <dianders@...omium.org>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: Neil Armstrong <neil.armstrong@...aro.org>, Jessica Zhang <quic_jesszhan@...cinc.com>, 
	Sam Ravnborg <sam@...nborg.org>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
	Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
	David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, dri-devel@...ts.freedesktop.org, 
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org, 
	linux-rockchip@...ts.infradead.org, Jeffrey Hugo <quic_jhugo@...cinc.com>
Subject: Re: [PATCH v3 0/3] drm/panel-edp: remove several legacy compatibles
 used by the driver

Hi,

On Thu, May 30, 2024 at 4:13 PM Dmitry Baryshkov
<dmitry.baryshkov@...aro.org> wrote:
>
> There are two ways to describe an eDP panel in device tree. The
> recommended way is to add a device on the AUX bus, ideally using the
> edp-panel compatible. The legacy way is to define a top-level platform
> device for the panel.
>
> Document that adding support for eDP panels in a legacy way is strongly
> discouraged (if not forbidden at all).
>
> While we are at it, also drop legacy compatible strings and bindings for
> five panels. These compatible strings were never used by a DT file
> present in Linux kernel and most likely were never used with the
> upstream Linux kernel.
>
> The following compatibles were never used by the devices supported by
> the upstream kernel and are a subject to possible removal:
>
> - lg,lp097qx1-spa1
> - samsung,lsn122dl01-c01
> - sharp,ld-d5116z01b
>
> I'm considering dropping them later, unless there is a good reason not
> to do so.
>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> ---
> Changes in v3:
> - Rephrased the warning comment, following some of Doug's suggestions.
> - Link to v2: https://lore.kernel.org/r/20240529-edp-panel-drop-v2-0-fcfc457fc8dd@linaro.org
>
> Changes in v2:
> - Actually drop support for five panels acked by Doug Andersson
> - Link to v1: https://lore.kernel.org/r/20240523-edp-panel-drop-v1-1-045d62511d09@linaro.org
>
> ---
> Dmitry Baryshkov (3):
>       drm/panel-edp: add fat warning against adding new panel compatibles
>       dt-bindings: display: panel-simple: drop several eDP panels
>       drm/panel-edp: drop several legacy panels
>
>  .../bindings/display/panel/panel-simple.yaml       |  10 --
>  drivers/gpu/drm/panel/panel-edp.c                  | 192 +++------------------
>  2 files changed, 25 insertions(+), 177 deletions(-)

Thanks! I'm happy to apply this series or also happy if some other
drm-misc committer member wants to apply it. Probably we should wait
for a DT person to make sure that they don't have any problems with
the bindings change.


-Doug