linux-kernel - Re: [PATCH 3/3] drm/panel-edp: Choose correct preferred mode

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Message-ID: <CAA8EJpoPMkQRhCD-9SPSheiio1dH8V6BUv89MZKfZdrBzsBW-w@mail.gmail.com>
Date:   Thu, 2 Nov 2023 08:31:45 +0200
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Hsin-Yi Wang <hsinyi@...omium.org>
Cc:     Douglas Anderson <dianders@...omium.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        linux-kernel@...r.kernel.org, Maxime Ripard <mripard@...nel.org>,
        dri-devel@...ts.freedesktop.org,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Jessica Zhang <quic_jesszhan@...cinc.com>,
        Sam Ravnborg <sam@...nborg.org>
Subject: Re: [PATCH 3/3] drm/panel-edp: Choose correct preferred mode

On Wed, 1 Nov 2023 at 23:26, Hsin-Yi Wang <hsinyi@...omium.org> wrote:
>
> If a non generic edp-panel is under aux-bus, the mode read from edid would
> still be selected as preferred and results in multiple preferred modes,
> which is ambiguous.
>
> If a hard-coded mode is present, unset the preferred bit of the modes read
> from edid.

Can we skip the EDID completely if the hardcoded override is present?

>
> Signed-off-by: Hsin-Yi Wang <hsinyi@...omium.org>
> ---
>  drivers/gpu/drm/drm_modes.c       | 16 ++++++++++++++++
>  drivers/gpu/drm/panel/panel-edp.c |  7 +++++--
>  include/drm/drm_modes.h           |  1 +
>  3 files changed, 22 insertions(+), 2 deletions(-)

Anyway, this should be split into two patches. One for drm_modes.c,
another one for the panel driver.

-- 
With best wishes
Dmitry