linux-kernel - Re: [PATCH 4/5] drm/panel: nt36523: Get orientation from OF

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Message-ID: <ZDdj04+RiBcOP9z0@Gentoo>
Date:   Thu, 13 Apr 2023 10:07:15 +0800
From:   Jianhua Lu <lujianhua000@...il.com>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>
Cc:     Neil Armstrong <neil.armstrong@...aro.org>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/5] drm/panel: nt36523: Get orientation from OF

On Wed, Apr 12, 2023 at 09:46:01PM +0200, Konrad Dybcio wrote:
> Some bright vendors mount their display panels upside down. Add the
> required pieces to allow for accounting for that.
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>

Reviewed-by: Jianhua Lu <lujianhua000@...il.com>
> ---
>  drivers/gpu/drm/panel/panel-novatek-nt36523.c | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/drivers/gpu/drm/panel/panel-novatek-nt36523.c b/drivers/gpu/drm/panel/panel-novatek-nt36523.c
> index 3c81ec014eef..db4b4af13ec1 100644
> --- a/drivers/gpu/drm/panel/panel-novatek-nt36523.c
> +++ b/drivers/gpu/drm/panel/panel-novatek-nt36523.c
> @@ -31,6 +31,7 @@ struct panel_info {
>  	struct drm_panel panel;
>  	struct mipi_dsi_device *dsi[2];
>  	const struct panel_desc *desc;
> +	enum drm_panel_orientation orientation;
>  
>  	struct gpio_desc *reset_gpio;
>  	struct backlight_device *backlight;
> @@ -674,11 +675,19 @@ static int nt36523_get_modes(struct drm_panel *panel,
>  	return pinfo->desc->num_modes;
>  }
>  
> +static enum drm_panel_orientation nt36523_get_orientation(struct drm_panel *panel)
> +{
> +	struct panel_info *pinfo = to_panel_info(panel);
> +
> +	return pinfo->orientation;
> +}
> +
>  static const struct drm_panel_funcs nt36523_panel_funcs = {
>  	.disable = nt36523_disable,
>  	.prepare = nt36523_prepare,
>  	.unprepare = nt36523_unprepare,
>  	.get_modes = nt36523_get_modes,
> +	.get_orientation = nt36523_get_orientation,
>  };
>  
>  static int nt36523_bl_update_status(struct backlight_device *bl)
> @@ -784,6 +793,12 @@ static int nt36523_probe(struct mipi_dsi_device *dsi)
>  	mipi_dsi_set_drvdata(dsi, pinfo);
>  	drm_panel_init(&pinfo->panel, dev, &nt36523_panel_funcs, DRM_MODE_CONNECTOR_DSI);
>  
> +	ret = of_drm_get_panel_orientation(dev->of_node, &pinfo->orientation);
> +	if (ret < 0) {
> +		dev_err(dev, "%pOF: failed to get orientation %d\n", dev->of_node, ret);
> +		return ret;
> +	}
> +
>  	if (pinfo->desc->has_dcs_backlight) {
>  		pinfo->panel.backlight = nt36523_create_backlight(dsi);
>  		if (IS_ERR(pinfo->panel.backlight))
> 
> -- 
> 2.40.0
>