Some devices with a builtin panel have the panel mounted upside down,
this is indicated by the rotate_180 bit in the BDB_GENERAL_FEATURES VBT
block.

We store this info in dev_priv->vbt.orientation, use this to set the
connector's orientation property so that fbcon and userspace will show
the image the right way up on devices with an upside-down mounted panel.

This fixes the image being upside-down on a Teclast X89 tablet.

Signed-off-by: Hans de Goede <hdego...@redhat.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c 
b/drivers/gpu/drm/i915/display/intel_dp.c
index b05b2191b919..d31c04a22976 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -7350,9 +7350,12 @@ static bool intel_edp_init_connector(struct intel_dp 
*intel_dp,
        intel_connector->panel.backlight.power = intel_edp_backlight_power;
        intel_panel_setup_backlight(connector, pipe);
 
-       if (fixed_mode)
+       if (fixed_mode) {
+               connector->display_info.panel_orientation =
+                       dev_priv->vbt.orientation;
                drm_connector_init_panel_orientation_property(
                        connector, fixed_mode->hdisplay, fixed_mode->vdisplay);
+       }
 
        return true;
 
-- 
2.23.0

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