Re: [PATCH v4 4/8] drm/panel: lvds: Implement .get_orientation callback

From: Stephen Boyd
Date: Mon Jun 06 2022 - 15:08:57 EST


Quoting Hsin-Yi Wang (2022-06-06 08:24:27)
> diff --git a/drivers/gpu/drm/panel/panel-lvds.c b/drivers/gpu/drm/panel/panel-lvds.c
> index f11252fb00fe..491b64c2c8d6 100644
> --- a/drivers/gpu/drm/panel/panel-lvds.c
> +++ b/drivers/gpu/drm/panel/panel-lvds.c
> @@ -99,15 +99,30 @@ static int panel_lvds_get_modes(struct drm_panel *panel,
> drm_display_info_set_bus_formats(&connector->display_info,
> &lvds->bus_format, 1);
> connector->display_info.bus_flags = lvds->bus_flags;
> +
> + /*
> + * drm drivers are expected to call drm_panel_get_orientation() to get
> + * panel's orientation then drm_connector_set_panel_orientation() to
> + * set the property before drm_dev_register(). Otherwise there will be
> + * a WARN_ON if orientation is set after drm is registered.
> + */

Should this comment also be a "TODO: Remove once all drm drivers call
drm_connector_set_panel_orientation()"?

> drm_connector_set_panel_orientation(connector, lvds->orientation);
>
> return 1;
> }
>
> +static enum drm_panel_orientation panel_lvds_get_orientation,(struct drm_panel *panel)

Stray comma here ---^

> +{
> + struct panel_lvds *lvds = to_panel_lvds(panel);
> +
> + return lvds->orientation;
> +}
> +