2021-02-01 10:04:42

by Badhri Jagan Sridharan

Subject: [PATCH v1] usb: typec: tcpm: Handle vbus shutoff when in source mode

While in source mode, vbus could be shutoff by protections
circuits. TCPM does not move back to toggling state to
re-initiate connection. Fix this by moving to SRC_UNATTACHED
state when vbus shuts off while in source mode.

Signed-off-by: Badhri Jagan Sridharan <[email protected]>
---
drivers/usb/typec/tcpm/tcpm.c | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index 0afd8ef692e8..ff0732c12b8a 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -4897,6 +4897,17 @@ static void _tcpm_pd_vbus_off(struct tcpm_port *port)
/* Do nothing, waiting for sink detection */
break;

+ case SRC_STARTUP:
+ case SRC_SEND_CAPABILITIES:
+ case SRC_SEND_CAPABILITIES_TIMEOUT:
+ case SRC_NEGOTIATE_CAPABILITIES:
+ case SRC_TRANSITION_SUPPLY:
+ case SRC_READY:
+ case SRC_WAIT_NEW_CAPABILITIES:
+ /* Force to unattached state to re-initiate connection */
+ tcpm_set_state(port, SRC_UNATTACHED, 0);
+ break;
+
case PORT_RESET:
/*
* State set back to default mode once the timer completes.
--
2.30.0.365.g02bc693789-goog

2021-02-01 14:40:53

by Guenter Roeck

Subject: Re: [PATCH v1] usb: typec: tcpm: Handle vbus shutoff when in source mode

On 2/1/21 2:02 AM, Badhri Jagan Sridharan wrote:
> While in source mode, vbus could be shutoff by protections
> circuits. TCPM does not move back to toggling state to
> re-initiate connection. Fix this by moving to SRC_UNATTACHED
> state when vbus shuts off while in source mode.
>
> Signed-off-by: Badhri Jagan Sridharan <[email protected]>

Reviewed-by: Guenter Roeck <[email protected]>

> ---
> drivers/usb/typec/tcpm/tcpm.c | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
> index 0afd8ef692e8..ff0732c12b8a 100644
> --- a/drivers/usb/typec/tcpm/tcpm.c
> +++ b/drivers/usb/typec/tcpm/tcpm.c
> @@ -4897,6 +4897,17 @@ static void _tcpm_pd_vbus_off(struct tcpm_port *port)
> /* Do nothing, waiting for sink detection */
> break;
>
> + case SRC_STARTUP:
> + case SRC_SEND_CAPABILITIES:
> + case SRC_SEND_CAPABILITIES_TIMEOUT:
> + case SRC_NEGOTIATE_CAPABILITIES:
> + case SRC_TRANSITION_SUPPLY:
> + case SRC_READY:
> + case SRC_WAIT_NEW_CAPABILITIES:
> + /* Force to unattached state to re-initiate connection */
> + tcpm_set_state(port, SRC_UNATTACHED, 0);
> + break;
> +
> case PORT_RESET:
> /*
> * State set back to default mode once the timer completes.
>

2021-02-02 08:24:53

by Heikki Krogerus

Subject: Re: [PATCH v1] usb: typec: tcpm: Handle vbus shutoff when in source mode

On Mon, Feb 01, 2021 at 02:02:12AM -0800, Badhri Jagan Sridharan wrote:
> While in source mode, vbus could be shutoff by protections
> circuits. TCPM does not move back to toggling state to
> re-initiate connection. Fix this by moving to SRC_UNATTACHED
> state when vbus shuts off while in source mode.
>
> Signed-off-by: Badhri Jagan Sridharan <[email protected]>

Reviewed-by: Heikki Krogerus <[email protected]>

> ---
> drivers/usb/typec/tcpm/tcpm.c | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
> index 0afd8ef692e8..ff0732c12b8a 100644
> --- a/drivers/usb/typec/tcpm/tcpm.c
> +++ b/drivers/usb/typec/tcpm/tcpm.c
> @@ -4897,6 +4897,17 @@ static void _tcpm_pd_vbus_off(struct tcpm_port *port)
> /* Do nothing, waiting for sink detection */
> break;
>
> + case SRC_STARTUP:
> + case SRC_SEND_CAPABILITIES:
> + case SRC_SEND_CAPABILITIES_TIMEOUT:
> + case SRC_NEGOTIATE_CAPABILITIES:
> + case SRC_TRANSITION_SUPPLY:
> + case SRC_READY:
> + case SRC_WAIT_NEW_CAPABILITIES:
> + /* Force to unattached state to re-initiate connection */
> + tcpm_set_state(port, SRC_UNATTACHED, 0);
> + break;
> +
> case PORT_RESET:
> /*
> * State set back to default mode once the timer completes.
> --
> 2.30.0.365.g02bc693789-goog

thanks,

--
heikki