linux-kernel - Re: [PATCH v5 00/15] eDP: Support probing eDP panels dynamically instead of hardcoding

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Date:   Fri, 24 Sep 2021 07:55:54 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Andrzej Hajda <a.hajda@...sung.com>
Cc:     Jani Nikula <jani.nikula@...ux.intel.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Sam Ravnborg <sam@...nborg.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "open list:DRM PANEL DRIVERS" <dri-devel@...ts.freedesktop.org>,
        MSM <linux-arm-msm@...r.kernel.org>,
        David Airlie <airlied@...ux.ie>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Daniel Vetter <daniel@...ll.ch>,
        Maxime Ripard <mripard@...nel.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Arnd Bergmann <arnd@...db.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Emil Velikov <emil.velikov@...labora.com>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Jagan Teki <jagan@...rulasolutions.com>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Kees Cook <keescook@...omium.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Russell King <linux@...linux.org.uk>,
        Will Deacon <will@...nel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Linux-OMAP <linux-omap@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
        linux-sunxi@...ts.linux.dev,
        linux-tegra <linux-tegra@...r.kernel.org>,
        Stanislav Lisovskiy <stanislav.lisovskiy@...el.com>,
        Srikanth Myakam <smyakam@...rosoft.com>
Subject: Re: [PATCH v5 00/15] eDP: Support probing eDP panels dynamically
 instead of hardcoding

Hi,

On Fri, Sep 24, 2021 at 6:59 AM Doug Anderson <dianders@...omium.org> wrote:
>
> Hi,
>
> On Fri, Sep 24, 2021 at 2:10 AM Andrzej Hajda <a.hajda@...sung.com> wrote:
> >
> > Hi
> >
> > removed most cc, due to server limitation
> >
> >
> > W dniu 24.09.2021 o 10:03, Jani Nikula pisze:
> > > On Mon, 20 Sep 2021, Doug Anderson <dianders@...omium.org> wrote:
> > >> Pushed all 15 to drm-misc-next.
> > > ...
> > >> e8de4d55c259 drm/edid: Use new encoded panel id style for quirks matching
> > >> d9f91a10c3e8 drm/edid: Allow querying/working with the panel ID from
> > >> the EDID
> > > Hi Doug, Stan's reporting "initializer element is not constant" issues
> > > here that were discussed before [1]. I wonder what gives, you said you'd
> > > hit them on a draft version, but not with what was merged, and I can't
> > > reproduce this either. Curious.
> >
> >
> > Apparently this is grey area of unclear specification.
> >
> > gcc version below 8 reports error, above 8.1+ should work [1]. I am not
> > sure if there is nice workaround for older gcc.
> >
> >
> > [1]: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69960#c18
>
> So I think the only solution is to go back to the character-at-a-time
> version. It's slightly uglier but functionality trumps form.
>
> I'll post something today though it might need to wait a few hours
> before I can manage it.

I managed to squeeze it in before my other obligations:

https://lore.kernel.org/all/20210924075317.1.I1e58d74d501613f1fe7585958f451160d11b8a98@changeid

I didn't CC everyone here but dri-devel and LKML are copied so
hopefully if I missed someone it should still be accessible.

-Doug