drm/panel-simple: Remove custom handling of orientation

The framework now handles reading orientation from DT, therefore
remove the custom get_orientation hook from panel-simple.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>

Author: 6by9

drivers/gpu/drm/panel/panel-simple.c

@@ -154,8 +154,6 @@ struct panel_simple {
 	struct edid *edid;
 
 	struct drm_display_mode override_mode;
-
-	enum drm_panel_orientation orientation;
 };
 
 static inline struct panel_simple *to_panel_simple(struct drm_panel *panel)
@@ -412,12 +410,6 @@ static int panel_simple_get_modes(struct drm_panel *panel,
 	/* add hard-coded panel modes */
 	num += panel_simple_get_non_edid_modes(p, connector);
 
-	/*
-	 * TODO: Remove once all drm drivers call
-	 * drm_connector_set_orientation_from_panel()
-	 */
-	drm_connector_set_panel_orientation(connector, p->orientation);
-
 	return num;
 }
 
@@ -438,20 +430,12 @@ static int panel_simple_get_timings(struct drm_panel *panel,
 	return p->desc->num_timings;
 }
 
-static enum drm_panel_orientation panel_simple_get_orientation(struct drm_panel *panel)
-{
-	struct panel_simple *p = to_panel_simple(panel);
-
-	return p->orientation;
-}
-
 static const struct drm_panel_funcs panel_simple_funcs = {
 	.disable = panel_simple_disable,
 	.unprepare = panel_simple_unprepare,
 	.prepare = panel_simple_prepare,
 	.enable = panel_simple_enable,
 	.get_modes = panel_simple_get_modes,
-	.get_orientation = panel_simple_get_orientation,
 	.get_timings = panel_simple_get_timings,
 };
 
@@ -579,12 +563,6 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
 		return dev_err_probe(dev, PTR_ERR(panel->enable_gpio),
 				     "failed to request GPIO\n");
 
-	err = of_drm_get_panel_orientation(dev->of_node, &panel->orientation);
-	if (err) {
-		dev_err(dev, "%pOF: failed to get orientation %d\n", dev->of_node, err);
-		return err;
-	}
-
 	ddc = of_parse_phandle(dev->of_node, "ddc-i2c-bus", 0);
 	if (ddc) {
 		panel->ddc = of_find_i2c_adapter_by_node(ddc);