diff options
Diffstat (limited to 'drivers/usb/typec/tcpm')
| -rw-r--r-- | drivers/usb/typec/tcpm/tcpm.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 9ce8c9af4da5..a1bf0dc5babf 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -1547,19 +1547,25 @@ static int tcpm_pd_svdm(struct tcpm_port *port, struct typec_altmode *adev, if (PD_VDO_VID(p[0]) != USB_SID_PD) break; - if (PD_VDO_SVDM_VER(p[0]) < svdm_version) + if (PD_VDO_SVDM_VER(p[0]) < svdm_version) { typec_partner_set_svdm_version(port->partner, PD_VDO_SVDM_VER(p[0])); + svdm_version = PD_VDO_SVDM_VER(p[0]); + } tcpm_ams_start(port, DISCOVER_IDENTITY); - /* 6.4.4.3.1: Only respond as UFP (device) */ - if (port->data_role == TYPEC_DEVICE && + /* + * PD2.0 Spec 6.10.3: respond with NAK as DFP (data host) + * PD3.1 Spec 6.4.4.2.5.1: respond with NAK if "invalid field" or + * "wrong configuation" or "Unrecognized" + */ + if ((port->data_role == TYPEC_DEVICE || svdm_version >= SVDM_VER_2_0) && port->nr_snk_vdo) { /* * Product Type DFP and Connector Type are not defined in SVDM * version 1.0 and shall be set to zero. */ - if (typec_get_negotiated_svdm_version(typec) < SVDM_VER_2_0) + if (svdm_version < SVDM_VER_2_0) response[1] = port->snk_vdo[0] & ~IDH_DFP_MASK & ~IDH_CONN_MASK; else |