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From: Kyle Tso <kyletso@google.com>
To: linux@roeck-us.net, heikki.krogerus@linux.intel.com,
	gregkh@linuxfoundation.org
Cc: badhri@google.com, linux-usb@vger.kernel.org,
	linux-kernel@vger.kernel.org, Kyle Tso <kyletso@google.com>
Subject: [PATCH 2/2] usb: typec: tcpm: Respond Not_Supported if no snk_vdo
Date: Fri, 21 May 2021 21:01:21 +0800	[thread overview]
Message-ID: <20210521130121.1470334-3-kyletso@google.com> (raw)
In-Reply-To: <20210521130121.1470334-1-kyletso@google.com>

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@google.com>
---
 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]);
-- 
2.31.1.818.g46aad6cb9e-goog


  parent reply	other threads:[~2021-05-21 13:02 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-21 13:01 [PATCH 0/2] Fix some VDM AMS handling Kyle Tso
2021-05-21 13:01 ` [PATCH 1/2] usb: typec: tcpm: Properly interrupt VDM AMS Kyle Tso
2021-05-21 14:48   ` Guenter Roeck
2021-05-22 20:22   ` kernel test robot
2021-05-22 20:22     ` kernel test robot
2021-05-23  2:02     ` Kyle Tso
2021-05-23  2:02       ` Kyle Tso
2021-05-21 13:01 ` Kyle Tso [this message]
2021-05-21 14:48   ` [PATCH 2/2] usb: typec: tcpm: Respond Not_Supported if no snk_vdo Guenter Roeck

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