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usb: typec: tcpm: Respond Not_Supported if no snk_vdo

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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: 193a68011f ("staging: typec: tcpm: Respond to Discover Identity commands")
Cc: stable <stable@vger.kernel.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Kyle Tso <kyletso@google.com>
Link: https://lore.kernel.org/r/20210523015855.1785484-3-kyletso@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kyle Tso 2021-05-23 09:58:55 +08:00 committed by Greg Kroah-Hartman
parent 0bc3ee9288
commit a20dcf53ea
1 changed files with 4 additions and 1 deletions
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5
drivers/usb/typec/tcpm/tcpm.c
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@ -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]);