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

[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>
---
 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;
-- 
2.25.1