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Subject[PATCH v4 4/8] drm/panel: lvds: Implement .get_orientation callback
Date
To return the orientation property to drm/kms driver.

Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
---
v3->v4: rebase to latest linux-next to solve conflict.
---
drivers/gpu/drm/panel/panel-lvds.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-lvds.c b/drivers/gpu/drm/panel/panel-lvds.c
index f11252fb00fe..491b64c2c8d6 100644
--- a/drivers/gpu/drm/panel/panel-lvds.c
+++ b/drivers/gpu/drm/panel/panel-lvds.c
@@ -99,15 +99,30 @@ static int panel_lvds_get_modes(struct drm_panel *panel,
drm_display_info_set_bus_formats(&connector->display_info,
&lvds->bus_format, 1);
connector->display_info.bus_flags = lvds->bus_flags;
+
+ /*
+ * drm drivers are expected to call drm_panel_get_orientation() to get
+ * panel's orientation then drm_connector_set_panel_orientation() to
+ * set the property before drm_dev_register(). Otherwise there will be
+ * a WARN_ON if orientation is set after drm is registered.
+ */
drm_connector_set_panel_orientation(connector, lvds->orientation);

return 1;
}

+static enum drm_panel_orientation panel_lvds_get_orientation,(struct drm_panel *panel)
+{
+ struct panel_lvds *lvds = to_panel_lvds(panel);
+
+ return lvds->orientation;
+}
+
static const struct drm_panel_funcs panel_lvds_funcs = {
.unprepare = panel_lvds_unprepare,
.prepare = panel_lvds_prepare,
.get_modes = panel_lvds_get_modes,
+ .get_orientation = panel_lvds_get_orientation,
};

static int panel_lvds_parse_dt(struct panel_lvds *lvds)
--
2.36.1.255.ge46751e96f-goog
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