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: <CAJMQK-gmWHXNmxk4fWM0DEDN0kdUxVJF_D8pU_8CYCpBnd3-Ag@mail.gmail.com>
Date: Wed, 28 Feb 2024 17:04:31 -0800
From: Hsin-Yi Wang <hsinyi@...omium.org>
To: Doug Anderson <dianders@...omium.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
Subject: Re: [PATCH v2 3/3] drm/panel: panel-edp: Fix AUO 0x405c panel naming
 and add a variant

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.