usb: typec: tipd: Track data_status changes for CD321x

HDP status for DisplayPort alt-mode is signaled data_status. Track
changes to have a debounced HPD to forward to the DRM KMS driver.

Signed-off-by: Janne Grunau <j@jannau.net>

Author: jannau

drivers/usb/typec/tipd/core.c

@@ -194,6 +194,7 @@ struct cd321x_status {
 	u32 pwr_status;
 	u32 data_status;
 	u32 status_changed;
+	u32 data_status_changed;
 	struct usb_pd_identity partner_identity;
 	struct tps6598x_dp_sid_status_reg dp_sid_status;
 	struct tps6598x_intel_vid_status_reg intel_vid_status;
@@ -745,6 +746,7 @@ static void cd321x_update_work(struct work_struct *work)
 
 	st = cd321x->update_status;
 	cd321x->update_status.status_changed = 0;
+	cd321x->update_status.data_status_changed = 0;
 
 	bool old_connected = !!tps->partner;
 	bool new_connected = st.status & TPS_STATUS_PLUG_PRESENT;
@@ -841,6 +843,7 @@ static void cd321x_update_work(struct work_struct *work)
 static void cd321x_queue_status(struct cd321x *cd321x)
 {
 	cd321x->update_status.status_changed |= cd321x->update_status.status ^ cd321x->tps.status;
+	cd321x->update_status.data_status_changed |= cd321x->update_status.data_status ^ cd321x->tps.data_status;
 
 	cd321x->update_status.status = cd321x->tps.status;
 	cd321x->update_status.pwr_status = cd321x->tps.pwr_status;