amd/display: enable panel orientation quirks

This patch allows panel orientation quirks from DRM core to be
used. They attach a DRM connector property "panel orientation"
which indicates in which direction the panel has been mounted.
Some machines have the internal screen mounted with a rotation.

Since the panel orientation quirks need the native mode from the
EDID, check for it in amdgpu_dm_connector_ddc_get_modes.
Signed-off-by: Simon Ser <contact@emersion.fr>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Harry Wentland <hwentlan@amd.com>
Cc: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -7826,6 +7826,32 @@ static void amdgpu_dm_connector_add_common_modes(struct drm_encoder *encoder,
 	}
 }
 
+static void amdgpu_set_panel_orientation(struct drm_connector *connector)
+{
+	struct drm_encoder *encoder;
+	struct amdgpu_encoder *amdgpu_encoder;
+	const struct drm_display_mode *native_mode;
+
+	if (connector->connector_type != DRM_MODE_CONNECTOR_eDP &&
+	    connector->connector_type != DRM_MODE_CONNECTOR_LVDS)
+		return;
+
+	encoder = amdgpu_dm_connector_to_encoder(connector);
+	if (!encoder)
+		return;
+
+	amdgpu_encoder = to_amdgpu_encoder(encoder);
+
+	native_mode = &amdgpu_encoder->native_mode;
+	if (native_mode->hdisplay == 0 || native_mode->vdisplay == 0)
+		return;
+
+	drm_connector_set_panel_orientation_with_quirk(connector,
+						       DRM_MODE_PANEL_ORIENTATION_UNKNOWN,
+						       native_mode->hdisplay,
+						       native_mode->vdisplay);
+}
+
 static void amdgpu_dm_connector_ddc_get_modes(struct drm_connector *connector,
 					      struct edid *edid)
 {
@@ -7854,6 +7880,8 @@ static void amdgpu_dm_connector_ddc_get_modes(struct drm_connector *connector,
 		 * restored here.
 		 */
 		amdgpu_dm_update_freesync_caps(connector, edid);
+
+		amdgpu_set_panel_orientation(connector);
 	} else {
 		amdgpu_dm_connector->num_modes = 0;
 	}