The USB Communications Capable bit indicates if port
partner is capable of communication over the USB data lines
(e.g. D+/- or SS Tx/Rx). Notify the status of the bit to low
level drivers to perform chip specific operation.
For instance, low level driver enables USB switches on D+/D-
lines to set up data path when the bit is set.
Refactored from patch initially authored by
Kyle Tso <[email protected]>
Signed-off-by: Badhri Jagan Sridharan <[email protected]>
---
Changes since V1:
- Removed partner_usb_comm_capable flag.
- Fixed capable flag for SNK_NEGOTIATE_CAPABILITIES.
---
drivers/usb/typec/tcpm/tcpm.c | 13 +++++++++++++
include/linux/usb/tcpm.h | 5 +++++
2 files changed, 18 insertions(+)
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index 0afd8ef692e8..997a1a56c161 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -3429,6 +3429,14 @@ static void tcpm_unregister_altmodes(struct tcpm_port *port)
memset(modep, 0, sizeof(*modep));
}
+static void tcpm_set_partner_usb_comm_capable(struct tcpm_port *port, bool capable)
+{
+ tcpm_log(port, "Setting usb_comm capable %s", capable ? "true" : "false");
+
+ if (port->tcpc->set_partner_usb_comm_capable)
+ port->tcpc->set_partner_usb_comm_capable(port->tcpc, capable);
+}
+
static void tcpm_reset_port(struct tcpm_port *port)
{
int ret;
@@ -3445,6 +3453,7 @@ static void tcpm_reset_port(struct tcpm_port *port)
port->attached = false;
port->pd_capable = false;
port->pps_data.supported = false;
+ tcpm_set_partner_usb_comm_capable(port, false);
/*
* First Rx ID should be 0; set this to a sentinel of -1 so that
@@ -3785,6 +3794,8 @@ static void run_state_machine(struct tcpm_port *port)
}
} else {
tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
+ tcpm_set_partner_usb_comm_capable(port,
+ !!(port->sink_request & RDO_USB_COMM));
tcpm_set_state(port, SRC_TRANSITION_SUPPLY,
PD_T_SRC_TRANSITION);
}
@@ -4004,6 +4015,8 @@ static void run_state_machine(struct tcpm_port *port)
break;
case SNK_NEGOTIATE_CAPABILITIES:
port->pd_capable = true;
+ tcpm_set_partner_usb_comm_capable(port,
+ !!(port->source_caps[0] & PDO_FIXED_USB_COMM));
port->hard_reset_count = 0;
ret = tcpm_pd_send_request(port);
if (ret < 0) {
diff --git a/include/linux/usb/tcpm.h b/include/linux/usb/tcpm.h
index 3af99f85e8b9..42fcfbe10590 100644
--- a/include/linux/usb/tcpm.h
+++ b/include/linux/usb/tcpm.h
@@ -108,6 +108,10 @@ enum tcpm_transmit_type {
* is supported by TCPC, set this callback for TCPM to query
* whether vbus is at VSAFE0V when needed.
* Returns true when vbus is at VSAFE0V, false otherwise.
+ * @set_partner_usb_comm_capable:
+ * Optional; The USB Communications Capable bit indicates if port
+ * partner is capable of communication over the USB data lines
+ * (e.g. D+/- or SS Tx/Rx). Called to notify the status of the bit.
*/
struct tcpc_dev {
struct fwnode_handle *fwnode;
@@ -139,6 +143,7 @@ struct tcpc_dev {
int (*set_auto_vbus_discharge_threshold)(struct tcpc_dev *dev, enum typec_pwr_opmode mode,
bool pps_active, u32 requested_vbus_voltage);
bool (*is_vbus_vsafe0v)(struct tcpc_dev *dev);
+ void (*set_partner_usb_comm_capable)(struct tcpc_dev *dev, bool enable);
};
struct tcpm_port;
--
2.30.0.365.g02bc693789-goog
Configure USB switches when partner is USB Communication capable.
The is enabled USB data communication over D+/D- pins.
Signed-off-by: Badhri Jagan Sridharan <[email protected]>
---
drivers/usb/typec/tcpm/tcpci_maxim.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/usb/typec/tcpm/tcpci_maxim.c b/drivers/usb/typec/tcpm/tcpci_maxim.c
index f1674a611033..041a1c393594 100644
--- a/drivers/usb/typec/tcpm/tcpci_maxim.c
+++ b/drivers/usb/typec/tcpm/tcpci_maxim.c
@@ -19,6 +19,9 @@
#define PD_ACTIVITY_TIMEOUT_MS 10000
#define TCPC_VENDOR_ALERT 0x80
+#define TCPC_VENDOR_USBSW_CTRL 0x93
+#define TCPC_VENDOR_USBSW_CTRL_ENABLE_USB_DATA 0x9
+#define TCPC_VENDOR_USBSW_CTRL_DISABLE_USB_DATA 0
#define TCPC_RECEIVE_BUFFER_COUNT_OFFSET 0
#define TCPC_RECEIVE_BUFFER_FRAME_TYPE_OFFSET 1
@@ -274,6 +277,21 @@ static void process_tx(struct max_tcpci_chip *chip, u16 status)
max_tcpci_init_regs(chip);
}
+/* Enable USB switches when partner is USB communications capable */
+static void max_tcpci_set_partner_usb_comm_capable(struct tcpci *tcpci, struct tcpci_data *data,
+ bool capable)
+{
+ struct max_tcpci_chip *chip = tdata_to_max_tcpci(data);
+ int ret;
+
+ ret = max_tcpci_write8(chip, TCPC_VENDOR_USBSW_CTRL, capable ?
+ TCPC_VENDOR_USBSW_CTRL_ENABLE_USB_DATA :
+ TCPC_VENDOR_USBSW_CTRL_DISABLE_USB_DATA);
+
+ if (ret < 0)
+ dev_err(chip->dev, "Failed to enable USB switches");
+}
+
static irqreturn_t _max_tcpci_irq(struct max_tcpci_chip *chip, u16 status)
{
u16 mask;
@@ -453,6 +471,7 @@ static int max_tcpci_probe(struct i2c_client *client, const struct i2c_device_id
chip->data.frs_sourcing_vbus = max_tcpci_frs_sourcing_vbus;
chip->data.auto_discharge_disconnect = true;
chip->data.vbus_vsafe0v = true;
+ chip->data.set_partner_usb_comm_capable = max_tcpci_set_partner_usb_comm_capable;
max_tcpci_init_regs(chip);
chip->tcpci = tcpci_register_port(chip->dev, &chip->data);
--
2.30.0.365.g02bc693789-goog
Hi Guenter,
Sent V2 version of the patch stack:
https://patchwork.kernel.org/project/linux-usb/list/?series=425705.
For me, Gmail is grouping this under v1 version for some reason and
since you had reviewed one other patch
which was sent later, I was wondering if you are having similar
grouping issue as well.
I am pinging here to make sure that the patch isn't missed.
Thanks,
Badhri
On Mon, Feb 1, 2021 at 4:31 PM Badhri Jagan Sridharan <[email protected]> wrote:
>
> The USB Communications Capable bit indicates if port
> partner is capable of communication over the USB data lines
> (e.g. D+/- or SS Tx/Rx). Notify the status of the bit to low
> level drivers to perform chip specific operation.
> For instance, low level driver enables USB switches on D+/D-
> lines to set up data path when the bit is set.
>
> Refactored from patch initially authored by
> Kyle Tso <[email protected]>
>
> Signed-off-by: Badhri Jagan Sridharan <[email protected]>
> ---
> Changes since V1:
> - Removed partner_usb_comm_capable flag.
> - Fixed capable flag for SNK_NEGOTIATE_CAPABILITIES.
> ---
> drivers/usb/typec/tcpm/tcpm.c | 13 +++++++++++++
> include/linux/usb/tcpm.h | 5 +++++
> 2 files changed, 18 insertions(+)
>
> diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
> index 0afd8ef692e8..997a1a56c161 100644
> --- a/drivers/usb/typec/tcpm/tcpm.c
> +++ b/drivers/usb/typec/tcpm/tcpm.c
> @@ -3429,6 +3429,14 @@ static void tcpm_unregister_altmodes(struct tcpm_port *port)
> memset(modep, 0, sizeof(*modep));
> }
>
> +static void tcpm_set_partner_usb_comm_capable(struct tcpm_port *port, bool capable)
> +{
> + tcpm_log(port, "Setting usb_comm capable %s", capable ? "true" : "false");
> +
> + if (port->tcpc->set_partner_usb_comm_capable)
> + port->tcpc->set_partner_usb_comm_capable(port->tcpc, capable);
> +}
> +
> static void tcpm_reset_port(struct tcpm_port *port)
> {
> int ret;
> @@ -3445,6 +3453,7 @@ static void tcpm_reset_port(struct tcpm_port *port)
> port->attached = false;
> port->pd_capable = false;
> port->pps_data.supported = false;
> + tcpm_set_partner_usb_comm_capable(port, false);
>
> /*
> * First Rx ID should be 0; set this to a sentinel of -1 so that
> @@ -3785,6 +3794,8 @@ static void run_state_machine(struct tcpm_port *port)
> }
> } else {
> tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
> + tcpm_set_partner_usb_comm_capable(port,
> + !!(port->sink_request & RDO_USB_COMM));
> tcpm_set_state(port, SRC_TRANSITION_SUPPLY,
> PD_T_SRC_TRANSITION);
> }
> @@ -4004,6 +4015,8 @@ static void run_state_machine(struct tcpm_port *port)
> break;
> case SNK_NEGOTIATE_CAPABILITIES:
> port->pd_capable = true;
> + tcpm_set_partner_usb_comm_capable(port,
> + !!(port->source_caps[0] & PDO_FIXED_USB_COMM));
> port->hard_reset_count = 0;
> ret = tcpm_pd_send_request(port);
> if (ret < 0) {
> diff --git a/include/linux/usb/tcpm.h b/include/linux/usb/tcpm.h
> index 3af99f85e8b9..42fcfbe10590 100644
> --- a/include/linux/usb/tcpm.h
> +++ b/include/linux/usb/tcpm.h
> @@ -108,6 +108,10 @@ enum tcpm_transmit_type {
> * is supported by TCPC, set this callback for TCPM to query
> * whether vbus is at VSAFE0V when needed.
> * Returns true when vbus is at VSAFE0V, false otherwise.
> + * @set_partner_usb_comm_capable:
> + * Optional; The USB Communications Capable bit indicates if port
> + * partner is capable of communication over the USB data lines
> + * (e.g. D+/- or SS Tx/Rx). Called to notify the status of the bit.
> */
> struct tcpc_dev {
> struct fwnode_handle *fwnode;
> @@ -139,6 +143,7 @@ struct tcpc_dev {
> int (*set_auto_vbus_discharge_threshold)(struct tcpc_dev *dev, enum typec_pwr_opmode mode,
> bool pps_active, u32 requested_vbus_voltage);
> bool (*is_vbus_vsafe0v)(struct tcpc_dev *dev);
> + void (*set_partner_usb_comm_capable)(struct tcpc_dev *dev, bool enable);
> };
>
> struct tcpm_port;
> --
> 2.30.0.365.g02bc693789-goog
>
On Mon, Feb 01, 2021 at 04:30:59PM -0800, Badhri Jagan Sridharan wrote:
> The USB Communications Capable bit indicates if port
> partner is capable of communication over the USB data lines
> (e.g. D+/- or SS Tx/Rx). Notify the status of the bit to low
> level drivers to perform chip specific operation.
> For instance, low level driver enables USB switches on D+/D-
> lines to set up data path when the bit is set.
>
> Refactored from patch initially authored by
> Kyle Tso <[email protected]>
>
> Signed-off-by: Badhri Jagan Sridharan <[email protected]>
Reviewed-by: Heikki Krogerus <[email protected]>
> ---
> Changes since V1:
> - Removed partner_usb_comm_capable flag.
> - Fixed capable flag for SNK_NEGOTIATE_CAPABILITIES.
> ---
> drivers/usb/typec/tcpm/tcpm.c | 13 +++++++++++++
> include/linux/usb/tcpm.h | 5 +++++
> 2 files changed, 18 insertions(+)
>
> diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
> index 0afd8ef692e8..997a1a56c161 100644
> --- a/drivers/usb/typec/tcpm/tcpm.c
> +++ b/drivers/usb/typec/tcpm/tcpm.c
> @@ -3429,6 +3429,14 @@ static void tcpm_unregister_altmodes(struct tcpm_port *port)
> memset(modep, 0, sizeof(*modep));
> }
>
> +static void tcpm_set_partner_usb_comm_capable(struct tcpm_port *port, bool capable)
> +{
> + tcpm_log(port, "Setting usb_comm capable %s", capable ? "true" : "false");
> +
> + if (port->tcpc->set_partner_usb_comm_capable)
> + port->tcpc->set_partner_usb_comm_capable(port->tcpc, capable);
> +}
> +
> static void tcpm_reset_port(struct tcpm_port *port)
> {
> int ret;
> @@ -3445,6 +3453,7 @@ static void tcpm_reset_port(struct tcpm_port *port)
> port->attached = false;
> port->pd_capable = false;
> port->pps_data.supported = false;
> + tcpm_set_partner_usb_comm_capable(port, false);
>
> /*
> * First Rx ID should be 0; set this to a sentinel of -1 so that
> @@ -3785,6 +3794,8 @@ static void run_state_machine(struct tcpm_port *port)
> }
> } else {
> tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
> + tcpm_set_partner_usb_comm_capable(port,
> + !!(port->sink_request & RDO_USB_COMM));
> tcpm_set_state(port, SRC_TRANSITION_SUPPLY,
> PD_T_SRC_TRANSITION);
> }
> @@ -4004,6 +4015,8 @@ static void run_state_machine(struct tcpm_port *port)
> break;
> case SNK_NEGOTIATE_CAPABILITIES:
> port->pd_capable = true;
> + tcpm_set_partner_usb_comm_capable(port,
> + !!(port->source_caps[0] & PDO_FIXED_USB_COMM));
> port->hard_reset_count = 0;
> ret = tcpm_pd_send_request(port);
> if (ret < 0) {
> diff --git a/include/linux/usb/tcpm.h b/include/linux/usb/tcpm.h
> index 3af99f85e8b9..42fcfbe10590 100644
> --- a/include/linux/usb/tcpm.h
> +++ b/include/linux/usb/tcpm.h
> @@ -108,6 +108,10 @@ enum tcpm_transmit_type {
> * is supported by TCPC, set this callback for TCPM to query
> * whether vbus is at VSAFE0V when needed.
> * Returns true when vbus is at VSAFE0V, false otherwise.
> + * @set_partner_usb_comm_capable:
> + * Optional; The USB Communications Capable bit indicates if port
> + * partner is capable of communication over the USB data lines
> + * (e.g. D+/- or SS Tx/Rx). Called to notify the status of the bit.
> */
> struct tcpc_dev {
> struct fwnode_handle *fwnode;
> @@ -139,6 +143,7 @@ struct tcpc_dev {
> int (*set_auto_vbus_discharge_threshold)(struct tcpc_dev *dev, enum typec_pwr_opmode mode,
> bool pps_active, u32 requested_vbus_voltage);
> bool (*is_vbus_vsafe0v)(struct tcpc_dev *dev);
> + void (*set_partner_usb_comm_capable)(struct tcpc_dev *dev, bool enable);
> };
>
> struct tcpm_port;
> --
> 2.30.0.365.g02bc693789-goog
thanks,
--
heikki
On Mon, Feb 01, 2021 at 04:31:01PM -0800, Badhri Jagan Sridharan wrote:
> Configure USB switches when partner is USB Communication capable.
> The is enabled USB data communication over D+/D- pins.
>
> Signed-off-by: Badhri Jagan Sridharan <[email protected]>
Reviewed-by: Heikki Krogerus <[email protected]>
> ---
> drivers/usb/typec/tcpm/tcpci_maxim.c | 19 +++++++++++++++++++
> 1 file changed, 19 insertions(+)
>
> diff --git a/drivers/usb/typec/tcpm/tcpci_maxim.c b/drivers/usb/typec/tcpm/tcpci_maxim.c
> index f1674a611033..041a1c393594 100644
> --- a/drivers/usb/typec/tcpm/tcpci_maxim.c
> +++ b/drivers/usb/typec/tcpm/tcpci_maxim.c
> @@ -19,6 +19,9 @@
> #define PD_ACTIVITY_TIMEOUT_MS 10000
>
> #define TCPC_VENDOR_ALERT 0x80
> +#define TCPC_VENDOR_USBSW_CTRL 0x93
> +#define TCPC_VENDOR_USBSW_CTRL_ENABLE_USB_DATA 0x9
> +#define TCPC_VENDOR_USBSW_CTRL_DISABLE_USB_DATA 0
>
> #define TCPC_RECEIVE_BUFFER_COUNT_OFFSET 0
> #define TCPC_RECEIVE_BUFFER_FRAME_TYPE_OFFSET 1
> @@ -274,6 +277,21 @@ static void process_tx(struct max_tcpci_chip *chip, u16 status)
> max_tcpci_init_regs(chip);
> }
>
> +/* Enable USB switches when partner is USB communications capable */
> +static void max_tcpci_set_partner_usb_comm_capable(struct tcpci *tcpci, struct tcpci_data *data,
> + bool capable)
> +{
> + struct max_tcpci_chip *chip = tdata_to_max_tcpci(data);
> + int ret;
> +
> + ret = max_tcpci_write8(chip, TCPC_VENDOR_USBSW_CTRL, capable ?
> + TCPC_VENDOR_USBSW_CTRL_ENABLE_USB_DATA :
> + TCPC_VENDOR_USBSW_CTRL_DISABLE_USB_DATA);
> +
> + if (ret < 0)
> + dev_err(chip->dev, "Failed to enable USB switches");
> +}
> +
> static irqreturn_t _max_tcpci_irq(struct max_tcpci_chip *chip, u16 status)
> {
> u16 mask;
> @@ -453,6 +471,7 @@ static int max_tcpci_probe(struct i2c_client *client, const struct i2c_device_id
> chip->data.frs_sourcing_vbus = max_tcpci_frs_sourcing_vbus;
> chip->data.auto_discharge_disconnect = true;
> chip->data.vbus_vsafe0v = true;
> + chip->data.set_partner_usb_comm_capable = max_tcpci_set_partner_usb_comm_capable;
>
> max_tcpci_init_regs(chip);
> chip->tcpci = tcpci_register_port(chip->dev, &chip->data);
> --
> 2.30.0.365.g02bc693789-goog
thanks,
--
heikki
On Mon, Feb 01, 2021 at 04:31:01PM -0800, Badhri Jagan Sridharan wrote:
> Configure USB switches when partner is USB Communication capable.
> The is enabled USB data communication over D+/D- pins.
>
> Signed-off-by: Badhri Jagan Sridharan <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
> ---
> drivers/usb/typec/tcpm/tcpci_maxim.c | 19 +++++++++++++++++++
> 1 file changed, 19 insertions(+)
>
> diff --git a/drivers/usb/typec/tcpm/tcpci_maxim.c b/drivers/usb/typec/tcpm/tcpci_maxim.c
> index f1674a611033..041a1c393594 100644
> --- a/drivers/usb/typec/tcpm/tcpci_maxim.c
> +++ b/drivers/usb/typec/tcpm/tcpci_maxim.c
> @@ -19,6 +19,9 @@
> #define PD_ACTIVITY_TIMEOUT_MS 10000
>
> #define TCPC_VENDOR_ALERT 0x80
> +#define TCPC_VENDOR_USBSW_CTRL 0x93
> +#define TCPC_VENDOR_USBSW_CTRL_ENABLE_USB_DATA 0x9
> +#define TCPC_VENDOR_USBSW_CTRL_DISABLE_USB_DATA 0
>
> #define TCPC_RECEIVE_BUFFER_COUNT_OFFSET 0
> #define TCPC_RECEIVE_BUFFER_FRAME_TYPE_OFFSET 1
> @@ -274,6 +277,21 @@ static void process_tx(struct max_tcpci_chip *chip, u16 status)
> max_tcpci_init_regs(chip);
> }
>
> +/* Enable USB switches when partner is USB communications capable */
> +static void max_tcpci_set_partner_usb_comm_capable(struct tcpci *tcpci, struct tcpci_data *data,
> + bool capable)
> +{
> + struct max_tcpci_chip *chip = tdata_to_max_tcpci(data);
> + int ret;
> +
> + ret = max_tcpci_write8(chip, TCPC_VENDOR_USBSW_CTRL, capable ?
> + TCPC_VENDOR_USBSW_CTRL_ENABLE_USB_DATA :
> + TCPC_VENDOR_USBSW_CTRL_DISABLE_USB_DATA);
> +
> + if (ret < 0)
> + dev_err(chip->dev, "Failed to enable USB switches");
> +}
> +
> static irqreturn_t _max_tcpci_irq(struct max_tcpci_chip *chip, u16 status)
> {
> u16 mask;
> @@ -453,6 +471,7 @@ static int max_tcpci_probe(struct i2c_client *client, const struct i2c_device_id
> chip->data.frs_sourcing_vbus = max_tcpci_frs_sourcing_vbus;
> chip->data.auto_discharge_disconnect = true;
> chip->data.vbus_vsafe0v = true;
> + chip->data.set_partner_usb_comm_capable = max_tcpci_set_partner_usb_comm_capable;
>
> max_tcpci_init_regs(chip);
> chip->tcpci = tcpci_register_port(chip->dev, &chip->data);
> --
> 2.30.0.365.g02bc693789-goog
>
On Mon, Feb 01, 2021 at 04:30:59PM -0800, Badhri Jagan Sridharan wrote:
> The USB Communications Capable bit indicates if port
> partner is capable of communication over the USB data lines
> (e.g. D+/- or SS Tx/Rx). Notify the status of the bit to low
> level drivers to perform chip specific operation.
> For instance, low level driver enables USB switches on D+/D-
> lines to set up data path when the bit is set.
>
> Refactored from patch initially authored by
> Kyle Tso <[email protected]>
>
> Signed-off-by: Badhri Jagan Sridharan <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
> ---
> Changes since V1:
> - Removed partner_usb_comm_capable flag.
> - Fixed capable flag for SNK_NEGOTIATE_CAPABILITIES.
> ---
> drivers/usb/typec/tcpm/tcpm.c | 13 +++++++++++++
> include/linux/usb/tcpm.h | 5 +++++
> 2 files changed, 18 insertions(+)
>
> diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
> index 0afd8ef692e8..997a1a56c161 100644
> --- a/drivers/usb/typec/tcpm/tcpm.c
> +++ b/drivers/usb/typec/tcpm/tcpm.c
> @@ -3429,6 +3429,14 @@ static void tcpm_unregister_altmodes(struct tcpm_port *port)
> memset(modep, 0, sizeof(*modep));
> }
>
> +static void tcpm_set_partner_usb_comm_capable(struct tcpm_port *port, bool capable)
> +{
> + tcpm_log(port, "Setting usb_comm capable %s", capable ? "true" : "false");
> +
> + if (port->tcpc->set_partner_usb_comm_capable)
> + port->tcpc->set_partner_usb_comm_capable(port->tcpc, capable);
> +}
> +
> static void tcpm_reset_port(struct tcpm_port *port)
> {
> int ret;
> @@ -3445,6 +3453,7 @@ static void tcpm_reset_port(struct tcpm_port *port)
> port->attached = false;
> port->pd_capable = false;
> port->pps_data.supported = false;
> + tcpm_set_partner_usb_comm_capable(port, false);
>
> /*
> * First Rx ID should be 0; set this to a sentinel of -1 so that
> @@ -3785,6 +3794,8 @@ static void run_state_machine(struct tcpm_port *port)
> }
> } else {
> tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
> + tcpm_set_partner_usb_comm_capable(port,
> + !!(port->sink_request & RDO_USB_COMM));
> tcpm_set_state(port, SRC_TRANSITION_SUPPLY,
> PD_T_SRC_TRANSITION);
> }
> @@ -4004,6 +4015,8 @@ static void run_state_machine(struct tcpm_port *port)
> break;
> case SNK_NEGOTIATE_CAPABILITIES:
> port->pd_capable = true;
> + tcpm_set_partner_usb_comm_capable(port,
> + !!(port->source_caps[0] & PDO_FIXED_USB_COMM));
> port->hard_reset_count = 0;
> ret = tcpm_pd_send_request(port);
> if (ret < 0) {
> diff --git a/include/linux/usb/tcpm.h b/include/linux/usb/tcpm.h
> index 3af99f85e8b9..42fcfbe10590 100644
> --- a/include/linux/usb/tcpm.h
> +++ b/include/linux/usb/tcpm.h
> @@ -108,6 +108,10 @@ enum tcpm_transmit_type {
> * is supported by TCPC, set this callback for TCPM to query
> * whether vbus is at VSAFE0V when needed.
> * Returns true when vbus is at VSAFE0V, false otherwise.
> + * @set_partner_usb_comm_capable:
> + * Optional; The USB Communications Capable bit indicates if port
> + * partner is capable of communication over the USB data lines
> + * (e.g. D+/- or SS Tx/Rx). Called to notify the status of the bit.
> */
> struct tcpc_dev {
> struct fwnode_handle *fwnode;
> @@ -139,6 +143,7 @@ struct tcpc_dev {
> int (*set_auto_vbus_discharge_threshold)(struct tcpc_dev *dev, enum typec_pwr_opmode mode,
> bool pps_active, u32 requested_vbus_voltage);
> bool (*is_vbus_vsafe0v)(struct tcpc_dev *dev);
> + void (*set_partner_usb_comm_capable)(struct tcpc_dev *dev, bool enable);
> };
>
> struct tcpm_port;
> --
> 2.30.0.365.g02bc693789-goog
>