[PATCH] drm/panel: add rotation support for Elida KD35T133 panels

[Lucas Stach]

Am Freitag, dem 02.04.2021 um 15:48 -0500 schrieb Chris Morgan:
> Update the panel to allow setting the rotation value in device tree.
> Tested on an Odroid Go Advance, where the panel is by default rotated 270
> degrees.
> 
> Signed-off-by: Chris Morgan <macromorgan at hotmail.com>

Reviewed-by: Lucas Stach <l.stach at pengutronix.de>

> ---
>  drivers/gpu/drm/panel/panel-elida-kd35t133.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/gpu/drm/panel/panel-elida-kd35t133.c b/drivers/gpu/drm/panel/panel-elida-kd35t133.c
> index bc36aa3c1123..d8534406d1ef 100644
> --- a/drivers/gpu/drm/panel/panel-elida-kd35t133.c
> +++ b/drivers/gpu/drm/panel/panel-elida-kd35t133.c
> @@ -42,6 +42,7 @@ struct kd35t133 {
>  	struct gpio_desc *reset_gpio;
>  	struct regulator *vdd;
>  	struct regulator *iovcc;
> +	enum drm_panel_orientation orientation;
>  	bool prepared;
>  };
>  
> @@ -216,6 +217,7 @@ static int kd35t133_get_modes(struct drm_panel *panel,
>  	connector->display_info.width_mm = mode->width_mm;
>  	connector->display_info.height_mm = mode->height_mm;
>  	drm_mode_probed_add(connector, mode);
> +	drm_connector_set_panel_orientation(connector, ctx->orientation);
>  
>  	return 1;
>  }
> @@ -258,6 +260,12 @@ static int kd35t133_probe(struct mipi_dsi_device *dsi)
>  		return ret;
>  	}
>  
> +	ret = of_drm_get_panel_orientation(dev->of_node, &ctx->orientation);
> +	if (ret < 0) {
> +		dev_err(dev, "%pOF: failed to get orientation %d\n", dev->of_node, ret);
> +		return ret;
> +	}
> +
>  	mipi_dsi_set_drvdata(dsi, ctx);
>  
>  	ctx->dev = dev;