From: Frank Wang <frank.wang@rock-chips.com>
To: linux@roeck-us.net, heikki.krogerus@linux.intel.com,
gregkh@linuxfoundation.org, heiko@sntech.de
Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-rockchip@lists.infradead.org, huangtao@rock-chips.com,
william.wu@rock-chips.com, jianwei.zheng@rock-chips.com,
yubing.zhang@rock-chips.com, wmc@rock-chips.com,
Frank Wang <frank.wang@rock-chips.com>
Subject: [PATCH 1/4] usb: typec: tcpm: fix cc role at port reset
Date: Mon, 13 Mar 2023 10:58:40 +0800 [thread overview]
Message-ID: <20230313025843.17162-2-frank.wang@rock-chips.com> (raw)
In-Reply-To: <20230313025843.17162-1-frank.wang@rock-chips.com>
In the current implementation, the tcpm set CC1/CC2 role to open when
it do port reset would cause the VBUS removed by the Type-C partner.
The Figure 4-20 in the TCPCI 2.0 specification show that the CC1/CC2
role should set to 01b (Rp) or 10b (Rd) at Power On or Reset stage
in DRP initialization and connection detection.
So set CC1/CC2 to Rd to fix it.
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
---
drivers/usb/typec/tcpm/tcpm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index a0d943d785800..66de02a56f512 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -4851,7 +4851,7 @@ static void run_state_machine(struct tcpm_port *port)
break;
case PORT_RESET:
tcpm_reset_port(port);
- tcpm_set_cc(port, TYPEC_CC_OPEN);
+ tcpm_set_cc(port, TYPEC_CC_RD);
tcpm_set_state(port, PORT_RESET_WAIT_OFF,
PD_T_ERROR_RECOVERY);
break;
--
2.17.1
next prev parent reply other threads:[~2023-03-13 3:06 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-13 2:58 [PATCH 0/4] Fix some defects related Type-C TCPM Frank Wang
2023-03-13 2:58 ` Frank Wang [this message]
2023-03-14 9:20 ` [PATCH 1/4] usb: typec: tcpm: fix cc role at port reset Heikki Krogerus
2023-03-15 2:55 ` Frank Wang
2023-03-17 11:24 ` Heikki Krogerus
2023-03-17 12:47 ` Guenter Roeck
2023-03-20 2:28 ` Frank Wang
2023-03-13 2:58 ` [PATCH 2/4] usb: typec: tcpm: fix multiple times discover svids error Frank Wang
2023-03-14 9:22 ` Heikki Krogerus
2023-03-15 2:57 ` Frank Wang
2023-03-13 2:58 ` [PATCH 3/4] usb: typec: tcpm: add get max power support Frank Wang
2023-03-13 2:58 ` [PATCH 4/4] usb: typec: tcpm: fix source caps may lost after soft reset Frank Wang
2023-03-17 12:58 ` Guenter Roeck
2023-03-20 2:38 ` Frank Wang
2023-03-20 3:35 ` Guenter Roeck
2023-03-20 6:28 ` Frank Wang
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