linux-kernel - Re: [PATCH v2 3/3] drm/panel: panel-edp: Fix AUO 0x405c panel naming and add a variant

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Message-ID: <CAA8EJpr7LHvqeGXhbFQ8KNn0LGDuv19cw0i04qVUz51TJeSQrA@mail.gmail.com>
Date: Thu, 29 Feb 2024 03:12:56 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Hsin-Yi Wang <hsinyi@...omium.org>
Cc: Doug Anderson <dianders@...omium.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
Subject: Re: [PATCH v2 3/3] drm/panel: panel-edp: Fix AUO 0x405c panel naming
 and add a variant

On Thu, 29 Feb 2024 at 03:05, Hsin-Yi Wang <hsinyi@...omium.org> wrote:
>
> On Wed, Feb 28, 2024 at 4:22 PM Doug Anderson <dianders@...omium.org> wrote:
> >
> > Hi,
> >
> > On Tue, Feb 27, 2024 at 5:11 PM Hsin-Yi Wang <hsinyi@...omium.org> wrote:
> > >
> > > There are 2 different AUO panels using the same panel id. One of the
> > > variants requires using overridden modes to resolve glitching issue as
> > > described in commit 70e0d5550f5c ("drm/panel-edp: Add auo_b116xa3_mode").
> > > Other variants should use the modes parsed from EDID.
> > >
> > > Signed-off-by: Hsin-Yi Wang <hsinyi@...omium.org>
> > > ---
> > > v2: new
> > > ---
> > >  drivers/gpu/drm/panel/panel-edp.c | 17 ++++++++++++++++-
> > >  1 file changed, 16 insertions(+), 1 deletion(-)
> >
> > The previous version of this patch that we reverted also had an
> > override for AUO 0x615c. Is that one no longer needed?
> >
> >
> > > @@ -1990,7 +2003,9 @@ static const struct edp_panel_entry edp_panels[] = {
> > >         EDP_PANEL_ENTRY('A', 'U', 'O', 0x239b, &delay_200_500_e50, "B116XAN06.1"),
> > >         EDP_PANEL_ENTRY('A', 'U', 'O', 0x255c, &delay_200_500_e50, "B116XTN02.5"),
> > >         EDP_PANEL_ENTRY('A', 'U', 'O', 0x403d, &delay_200_500_e50, "B140HAN04.0"),
> > > -       EDP_PANEL_ENTRY('A', 'U', 'O', 0x405c, &auo_b116xak01.delay, "B116XAK01.0"),
> > > +       EDP_PANEL_ENTRY('A', 'U', 'O', 0x405c, &auo_b116xak01.delay, "B116XAN04.0 "),
> > > +       EDP_PANEL_ENTRY2('A', 'U', 'O', 0x405c, &auo_b116xak01.delay, "B116XAK01.0 ",
> > > +                        &auo_b116xa3_mode),
> >
> > The name string now has a space at the end of it. I _guess_ that's OK.
> > Hmmm, but I guess you should update the kernel doc for "struct
> > edp_panel_entry". The name field is described as "Name of this panel
> > (for printing to logs)". Now it should include that it's also used for
> > matching EDIDs in some cases too.
>
> The space here is because in the EDID, there is space at the end,
> before 0x0a (\n).
> Okay I will update the kernel doc to mention that the same should be
> exactly the same as the panel name.

Maybe it would be better to strip all the whitespace on the right?

-- 
With best wishes
Dmitry