Re: [PATCH 05/10] drm/panel: Create attach and detach callbacks

[Jagan Teki <jagan@amarulasolutions.com>]

Hi Maxime,

On Tue, Jul 20, 2021 at 7:15 PM Maxime Ripard <maxime@cerno.tech> wrote:
>
> In order to make the probe order expectation more consistent between
> bridges, let's create attach and detach hooks for the panels as well to
> match what is there for bridges.
>
> Signed-off-by: Maxime Ripard <maxime@cerno.tech>
> ---
>  drivers/gpu/drm/drm_panel.c | 20 ++++++++++++++++++++
>  include/drm/drm_panel.h     |  6 ++++++
>  2 files changed, 26 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_panel.c b/drivers/gpu/drm/drm_panel.c
> index f634371c717a..23bca798a2f3 100644
> --- a/drivers/gpu/drm/drm_panel.c
> +++ b/drivers/gpu/drm/drm_panel.c
> @@ -223,6 +223,26 @@ int drm_panel_get_modes(struct drm_panel *panel,
>  }
>  EXPORT_SYMBOL(drm_panel_get_modes);
>
> +int drm_panel_attach(struct drm_panel *panel)
> +{
> +       if (!panel)
> +               return -EINVAL;
> +
> +       if (panel->funcs && panel->funcs->attach)
> +               return panel->funcs->attach(panel);
> +
> +       return -EOPNOTSUPP;

Most of the panel drivers won't require panel attach/detach API's so
we need to handle those cases as well if we didn't already.

Thanks,
Jagan.