linux-kernel - [PATCH] usb: pd: Set PD_T_SINK_WAIT

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Date:   Fri, 28 May 2021 16:16:13 +0800
From:   Kyle Tso <kyletso@...gle.com>
To:     linux@...ck-us.net, gregkh@...uxfoundation.org
Cc:     badhri@...gle.com, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, Kyle Tso <kyletso@...gle.com>
Subject: [PATCH] usb: pd: Set PD_T_SINK_WAIT_CAP to 310ms

Current timer PD_T_SINK_WAIT_CAP is set to 240ms which will violate the
SinkWaitCapTimer (tTypeCSinkWaitCap 310 - 620 ms) defined in the PD
Spec if the port is faster enough when running the state machine. Set it
to the lower bound 310ms to ensure the timeout is in Spec.

Fixes: f0690a25a140 ("staging: typec: USB Type-C Port Manager (tcpm)")
Signed-off-by: Kyle Tso <kyletso@...gle.com>
---
 include/linux/usb/pd.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/usb/pd.h b/include/linux/usb/pd.h
index bf00259493e0..96b7ff66f074 100644
--- a/include/linux/usb/pd.h
+++ b/include/linux/usb/pd.h
@@ -460,7 +460,7 @@ static inline unsigned int rdo_max_power(u32 rdo)
 #define PD_T_RECEIVER_RESPONSE	15	/* 15ms max */
 #define PD_T_SOURCE_ACTIVITY	45
 #define PD_T_SINK_ACTIVITY	135
-#define PD_T_SINK_WAIT_CAP	240
+#define PD_T_SINK_WAIT_CAP	310	/* 310 - 620 ms */
 #define PD_T_PS_TRANSITION	500
 #define PD_T_SRC_TRANSITION	35
 #define PD_T_DRP_SNK		40
-- 
2.32.0.rc0.204.g9fa02ecfa5-goog