[PATCH 4/5] drm/panel: nt36523: Get orientation from OF

[Konrad Dybcio]

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.dyb...@linaro.org>
---
 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