drm/panel-simple: Read panel orientation

The panel orientation needs to parsed from a device-tree and assigned to
the panel's connector in order to make orientation property available to
userspace. That's what this patch does for the panel-simple driver.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200813215609.28643-5-digetx@gmail.com

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 6c8a9b5b67b029458a8c3f60adde7fb35e44f002..4eabfdd3be2d74b704b47eeb53b4b5e70ed26998 100644 (file)
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -112,6 +112,8 @@ struct panel_simple {
        struct gpio_desc *hpd_gpio;
 
        struct drm_display_mode override_mode;
+
+       enum drm_panel_orientation orientation;
 };
 
 static inline struct panel_simple *to_panel_simple(struct drm_panel *panel)
@@ -371,6 +373,9 @@ static int panel_simple_get_modes(struct drm_panel *panel,
        /* add hard-coded panel modes */
        num += panel_simple_get_non_edid_modes(p, connector);
 
+       /* set up connector's "panel orientation" property */
+       drm_connector_set_panel_orientation(connector, p->orientation);
+
        return num;
 }
 
@@ -532,6 +537,12 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
                return err;
        }
 
+       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);