[v1,1/4] usb: typec: tcpm: Fix up PR_SWAP when vsafe0v is signalled
diff mbox series

Message ID 20210515052613.3261340-1-badhri@google.com
State New, archived
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Series
  • [v1,1/4] usb: typec: tcpm: Fix up PR_SWAP when vsafe0v is signalled
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Commit Message

Badhri Jagan Sridharan May 15, 2021, 5:26 a.m. UTC
During PR_SWAP, When TCPM is in PR_SWAP_SNK_SRC_SINK_OFF, vbus is
expected to reach VSAFE0V when source turns of vbus. Do not move
to SNK_UNATTACHED state when this happens.

Fixes: 28b43d3d746b ("usb: typec: tcpm: Introduce vsafe0v for vbus")
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
---
 drivers/usb/typec/tcpm/tcpm.c | 3 +++
 1 file changed, 3 insertions(+)

Comments

Peter Chen May 17, 2021, 1:30 a.m. UTC | #1
On 21-05-14 22:26:10, Badhri Jagan Sridharan wrote:
> During PR_SWAP, When TCPM is in PR_SWAP_SNK_SRC_SINK_OFF, vbus is
> expected to reach VSAFE0V when source turns of vbus. Do not move

%s/of/off

Peter

> to SNK_UNATTACHED state when this happens.
> 
> Fixes: 28b43d3d746b ("usb: typec: tcpm: Introduce vsafe0v for vbus")
> Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
> ---
>  drivers/usb/typec/tcpm/tcpm.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
> index c4fdc00a3bc8..b93c4c8d7b15 100644
> --- a/drivers/usb/typec/tcpm/tcpm.c
> +++ b/drivers/usb/typec/tcpm/tcpm.c
> @@ -5114,6 +5114,9 @@ static void _tcpm_pd_vbus_vsafe0v(struct tcpm_port *port)
>  				tcpm_set_state(port, SNK_UNATTACHED, 0);
>  		}
>  		break;
> +	case PR_SWAP_SNK_SRC_SINK_OFF:
> +		/* Do nothing, vsafe0v is expected during transition */
> +		break;
>  	default:
>  		if (port->pwr_role == TYPEC_SINK && port->auto_vbus_discharge_enabled)
>  			tcpm_set_state(port, SNK_UNATTACHED, 0);
> -- 
> 2.31.1.751.gd2f1c929bd-goog
>
Guenter Roeck May 17, 2021, 2:32 p.m. UTC | #2
On Fri, May 14, 2021 at 10:26:10PM -0700, Badhri Jagan Sridharan wrote:
> During PR_SWAP, When TCPM is in PR_SWAP_SNK_SRC_SINK_OFF, vbus is
> expected to reach VSAFE0V when source turns of vbus. Do not move

s/of/off/ as already reported

> to SNK_UNATTACHED state when this happens.
> 
> Fixes: 28b43d3d746b ("usb: typec: tcpm: Introduce vsafe0v for vbus")
> Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>

Otherwise

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

> ---
>  drivers/usb/typec/tcpm/tcpm.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
> index c4fdc00a3bc8..b93c4c8d7b15 100644
> --- a/drivers/usb/typec/tcpm/tcpm.c
> +++ b/drivers/usb/typec/tcpm/tcpm.c
> @@ -5114,6 +5114,9 @@ static void _tcpm_pd_vbus_vsafe0v(struct tcpm_port *port)
>  				tcpm_set_state(port, SNK_UNATTACHED, 0);
>  		}
>  		break;
> +	case PR_SWAP_SNK_SRC_SINK_OFF:
> +		/* Do nothing, vsafe0v is expected during transition */
> +		break;
>  	default:
>  		if (port->pwr_role == TYPEC_SINK && port->auto_vbus_discharge_enabled)
>  			tcpm_set_state(port, SNK_UNATTACHED, 0);
> -- 
> 2.31.1.751.gd2f1c929bd-goog
>

Patch
diff mbox series

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index c4fdc00a3bc8..b93c4c8d7b15 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -5114,6 +5114,9 @@  static void _tcpm_pd_vbus_vsafe0v(struct tcpm_port *port)
 				tcpm_set_state(port, SNK_UNATTACHED, 0);
 		}
 		break;
+	case PR_SWAP_SNK_SRC_SINK_OFF:
+		/* Do nothing, vsafe0v is expected during transition */
+		break;
 	default:
 		if (port->pwr_role == TYPEC_SINK && port->auto_vbus_discharge_enabled)
 			tcpm_set_state(port, SNK_UNATTACHED, 0);