Re: [PATCH 2/2] usb: typec: tcpm: Respond Not_Supported if no snk_vdo

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On 5/21/21 6:01 AM, Kyle Tso wrote:
If snk_vdo is not populated from fwnode, it implies the port does not
support responding to SVDM commands. Not_Supported Message shall be sent
if the contract is in PD3. And for PD2, the port shall ignore the
commands.

Fixes: 193a68011fdc ("staging: typec: tcpm: Respond to Discover Identity commands")
Signed-off-by: Kyle Tso <kyletso@xxxxxxxxxx>

Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>

---
  drivers/usb/typec/tcpm/tcpm.c | 5 ++++-
  1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index deb8a9d01f73..d32caa875d9a 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -2430,7 +2430,10 @@ static void tcpm_pd_data_request(struct tcpm_port *port,
  					   NONE_AMS);
  		break;
  	case PD_DATA_VENDOR_DEF:
-		tcpm_handle_vdm_request(port, msg->payload, cnt);
+		if (tcpm_vdm_ams(port) || port->nr_snk_vdo)
+			tcpm_handle_vdm_request(port, msg->payload, cnt);
+		else if (port->negotiated_rev > PD_REV20)
+			tcpm_pd_handle_msg(port, PD_MSG_CTRL_NOT_SUPP, NONE_AMS);
  		break;
  	case PD_DATA_BIST:
  		port->bist_request = le32_to_cpu(msg->payload[0]);





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