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

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Date: Fri, 31 May 2024 09:20:56 -0700
From: Doug Anderson <dianders@...omium.org>
To: Jeffrey Hugo <quic_jhugo@...cinc.com>
Cc: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, 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
Subject: Re: [PATCH v3 0/3] drm/panel-edp: remove several legacy compatibles
 used by the driver

Hi,

On Fri, May 31, 2024 at 9:18 AM Jeffrey Hugo <quic_jhugo@...cinc.com> wrote:
>
> On 5/30/2024 5:12 PM, Dmitry Baryshkov 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
>
> Ok to drop the sharp one I added.  It should be able to be handled by
> the (newish) edp-panel, but I think the TI bridge driver needs some work
> for the specific platform (no I2C connection) to verify.

Is the platform supported upstream? If so, which platform is it? Is
the TI bridge chip the ti-sn65dsi86? If so, I'm confused how you could
use that bridge chip without an i2c connection, but perhaps I'm
misunderstanding. :-P

Thanks!

-Doug