drm: xlnx: zynqmp_dpsub: fix hotplug detection

commit 71ba1c9 upstream.

drm_kms_helper_poll_init needs to be called after zynqmp_dpsub_kms_init.
zynqmp_dpsub_kms_init creates the connector and without it we don't
enable hotplug detection.

Fixes: eb2d64b ("drm: xlnx: zynqmp_dpsub: Report HPD through the bridge")
Cc: [email protected]
Signed-off-by: Steffen Dirkwinkel <[email protected]>
Signed-off-by: Tomi Valkeinen <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

drivers/gpu/drm/xlnx/zynqmp_kms.c

@@ -506,12 +506,12 @@ int zynqmp_dpsub_drm_init(struct zynqmp_dpsub *dpsub)
 	if (ret)
 		return ret;
 
-	drm_kms_helper_poll_init(drm);
-
 	ret = zynqmp_dpsub_kms_init(dpsub);
 	if (ret < 0)
 		goto err_poll_fini;
 
+	drm_kms_helper_poll_init(drm);
+
 	/* Reset all components and register the DRM device. */
 	drm_mode_config_reset(drm);