usb: typec: ucsi: Read the PDOs in separate work

Polling also the PDOs, just like the alt modes.

After this ucsi_handle_connector_change() doesn't execute
any commands.
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20210920142419.54493-7-heikki.krogerus@linux.intel.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/typec/ucsi/ucsi.c

@@ -571,7 +571,7 @@ static int ucsi_get_pdos(struct ucsi_connector *con, int is_partner,
 	command |= UCSI_GET_PDOS_SRC_PDOS;
 	ret = ucsi_send_command(ucsi, command, pdos + offset,
 				num_pdos * sizeof(u32));
-	if (ret < 0)
+	if (ret < 0 && ret != -ETIMEDOUT)
 		dev_err(ucsi->dev, "UCSI_GET_PDOS failed (%d)\n", ret);
 	if (ret == 0 && offset == 0)
 		dev_warn(ucsi->dev, "UCSI_GET_PDOS returned 0 bytes\n");
@@ -579,26 +579,30 @@ static int ucsi_get_pdos(struct ucsi_connector *con, int is_partner,
 	return ret;
 }
 
-static void ucsi_get_src_pdos(struct ucsi_connector *con, int is_partner)
+static int ucsi_get_src_pdos(struct ucsi_connector *con)
 {
 	int ret;
 
 	/* UCSI max payload means only getting at most 4 PDOs at a time */
 	ret = ucsi_get_pdos(con, 1, con->src_pdos, 0, UCSI_MAX_PDOS);
 	if (ret < 0)
-		return;
+		return ret;
 
 	con->num_pdos = ret / sizeof(u32); /* number of bytes to 32-bit PDOs */
 	if (con->num_pdos < UCSI_MAX_PDOS)
-		return;
+		return 0;
 
 	/* get the remaining PDOs, if any */
 	ret = ucsi_get_pdos(con, 1, con->src_pdos, UCSI_MAX_PDOS,
 			    PDO_MAX_OBJECTS - UCSI_MAX_PDOS);
 	if (ret < 0)
-		return;
+		return ret;
 
 	con->num_pdos += ret / sizeof(u32);
+
+	ucsi_port_psy_changed(con);
+
+	return 0;
 }
 
 static int ucsi_check_altmodes(struct ucsi_connector *con)
@@ -626,7 +630,7 @@ static void ucsi_pwr_opmode_change(struct ucsi_connector *con)
 	case UCSI_CONSTAT_PWR_OPMODE_PD:
 		con->rdo = con->status.request_data_obj;
 		typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_PD);
-		ucsi_get_src_pdos(con, 1);
+		ucsi_partner_task(con, ucsi_get_src_pdos, 30, 0);
 		ucsi_partner_task(con, ucsi_check_altmodes, 30, 0);
 		break;
 	case UCSI_CONSTAT_PWR_OPMODE_TYPEC1_5:
@@ -844,12 +848,6 @@ static void ucsi_handle_connector_change(struct work_struct *work)
 
 	role = !!(con->status.flags & UCSI_CONSTAT_PWR_DIR);
 
-	if (con->status.change & UCSI_CONSTAT_POWER_OPMODE_CHANGE ||
-	    con->status.change & UCSI_CONSTAT_POWER_LEVEL_CHANGE) {
-		ucsi_pwr_opmode_change(con);
-		ucsi_port_psy_changed(con);
-	}
-
 	if (con->status.change & UCSI_CONSTAT_POWER_DIR_CHANGE) {
 		typec_set_pwr_role(con->port, role);
 
@@ -900,6 +898,10 @@ static void ucsi_handle_connector_change(struct work_struct *work)
 				con->num, u_role);
 	}
 
+	if (con->status.change & UCSI_CONSTAT_POWER_OPMODE_CHANGE ||
+	    con->status.change & UCSI_CONSTAT_POWER_LEVEL_CHANGE)
+		ucsi_pwr_opmode_change(con);
+
 	if (con->status.change & UCSI_CONSTAT_PARTNER_CHANGE)
 		ucsi_partner_change(con);
 
@@ -1248,8 +1250,10 @@ static int ucsi_register_port(struct ucsi *ucsi, int index)
 		ret = 0;
 	}
 
-	if (UCSI_CONSTAT_PWR_OPMODE(con->status.flags) == UCSI_CONSTAT_PWR_OPMODE_PD)
+	if (UCSI_CONSTAT_PWR_OPMODE(con->status.flags) == UCSI_CONSTAT_PWR_OPMODE_PD) {
+		ucsi_get_src_pdos(con);
 		ucsi_check_altmodes(con);
+	}
 
 	trace_ucsi_register_port(con->num, &con->status);