Re: [PATCH v3 11/12] usb: typec: tcpm: add alt mode enter/exit/vdm support for sop'

Heikki Krogerus
2024-01-15T09:15:52Z

On Mon, Jan 08, 2024 at 07:16:24PM +0000, RD Babiera wrote:
> Add tcpm_cable_ops for enter, exit, and vdm to the tcpm, which are
> registered after registering port alt modes through
> typec_port_register_cable_ops. Enter Mode on SOP' now sends Exit Mode upon
> failure to report to the driver.
>
> tcpm_queue_vdm_unlocked now takes sop type as input. Proper adev_actions
> in tcpm_pd_svdm are selected for SOP' messages.
>
> Signed-off-by: RD Babiera <rdbabiera@google.com>

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

> ---
> drivers/usb/typec/tcpm/tcpm.c | 126 ++++++++++++++++++++++++++++------
> 1 file changed, 106 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
> index d16edf112858..86d9962961c2 100644
> --- a/drivers/usb/typec/tcpm/tcpm.c
> +++ b/drivers/usb/typec/tcpm/tcpm.c
> @@ -1556,7 +1556,7 @@ static void tcpm_queue_vdm(struct tcpm_port *port, const u32 header,
> }
>
> static void tcpm_queue_vdm_unlocked(struct tcpm_port *port, const u32 header,
> - const u32 *data, int cnt)
> + const u32 *data, int cnt, enum tcpm_transmit_type tx_sop_type)
> {
> mutex_lock(&port->lock);
> tcpm_queue_vdm(port, header, data, cnt, TCPC_TX_SOP);
> @@ -2144,14 +2144,28 @@ static int tcpm_pd_svdm(struct tcpm_port *port, struct typec_altmode *adev,
> }
> break;
> case CMD_ENTER_MODE:
> - if (adev && pdev)
> - *adev_action = ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL;
> + *response_tx_sop_type = rx_sop_type;
> + if (rx_sop_type == TCPC_TX_SOP) {
> + if (adev && pdev) {
> + typec_altmode_update_active(pdev, true);
> + *adev_action = ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL;
> + }
> + } else if (rx_sop_type == TCPC_TX_SOP_PRIME) {
> + if (adev && pdev_prime) {
> + typec_altmode_update_active(pdev_prime, true);
> + *adev_action = ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL;
> + }
> + }
> return 0;
> case CMD_EXIT_MODE:
> - if (adev && pdev) {
> - /* Back to USB Operation */
> - *adev_action = ADEV_NOTIFY_USB_AND_QUEUE_VDM;
> - return 0;
> + *response_tx_sop_type = rx_sop_type;
> + if (rx_sop_type == TCPC_TX_SOP) {
> + if (adev && pdev) {
> + typec_altmode_update_active(pdev, false);
> + /* Back to USB Operation */
> + *adev_action = ADEV_NOTIFY_USB_AND_QUEUE_VDM;
> + return 0;
> + }
> }
> break;
> case VDO_CMD_VENDOR(0) ... VDO_CMD_VENDOR(15):
> @@ -2284,19 +2298,37 @@ static void tcpm_handle_vdm_request(struct tcpm_port *port,
> typec_altmode_vdm(adev, p[0], &p[1], cnt);
> break;
> case ADEV_QUEUE_VDM:
> - typec_altmode_vdm(adev, p[0], &p[1], cnt);
> + if (response_tx_sop_type == TCPC_TX_SOP_PRIME)
> + typec_cable_altmode_vdm(adev, TYPEC_PLUG_SOP_P, p[0], &p[1], cnt);
> + else
> + typec_altmode_vdm(adev, p[0], &p[1], cnt);
> break;
> case ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL:
> - if (typec_altmode_vdm(adev, p[0], &p[1], cnt)) {
> - int svdm_version = typec_get_negotiated_svdm_version(
> - port->typec_port);
> - if (svdm_version < 0)
> - break;
> + if (response_tx_sop_type == TCPC_TX_SOP_PRIME) {
> + if (typec_cable_altmode_vdm(adev, TYPEC_PLUG_SOP_P,
> + p[0], &p[1], cnt)) {
> + int svdm_version = typec_get_cable_svdm_version(
> + port->typec_port);
> + if (svdm_version < 0)
> + break;
>
> - response[0] = VDO(adev->svid, 1, svdm_version,
> - CMD_EXIT_MODE);
> - response[0] |= VDO_OPOS(adev->mode);
> - rlen = 1;
> + response[0] = VDO(adev->svid, 1, svdm_version,
> + CMD_EXIT_MODE);
> + response[0] |= VDO_OPOS(adev->mode);
> + rlen = 1;
> + }
> + } else {
> + if (typec_altmode_vdm(adev, p[0], &p[1], cnt)) {
> + int svdm_version = typec_get_negotiated_svdm_version(
> + port->typec_port);
> + if (svdm_version < 0)
> + break;
> +
> + response[0] = VDO(adev->svid, 1, svdm_version,
> + CMD_EXIT_MODE);
> + response[0] |= VDO_OPOS(adev->mode);
> + rlen = 1;
> + }
> }
> break;
> case ADEV_ATTENTION:
> @@ -2731,7 +2763,7 @@ static int tcpm_altmode_enter(struct typec_altmode *altmode, u32 *vdo)
> header = VDO(altmode->svid, vdo ? 2 : 1, svdm_version, CMD_ENTER_MODE);
> header |= VDO_OPOS(altmode->mode);
>
> - tcpm_queue_vdm_unlocked(port, header, vdo, vdo ? 1 : 0);
> + tcpm_queue_vdm_unlocked(port, header, vdo, vdo ? 1 : 0, TCPC_TX_SOP);
> return 0;
> }
>
> @@ -2748,7 +2780,7 @@ static int tcpm_altmode_exit(struct typec_altmode *altmode)
> header = VDO(altmode->svid, 1, svdm_version, CMD_EXIT_MODE);
> header |= VDO_OPOS(altmode->mode);
>
> - tcpm_queue_vdm_unlocked(port, header, NULL, 0);
> + tcpm_queue_vdm_unlocked(port, header, NULL, 0, TCPC_TX_SOP);
> return 0;
> }
>
> @@ -2757,7 +2789,7 @@ static int tcpm_altmode_vdm(struct typec_altmode *altmode,
> {
> struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
>
> - tcpm_queue_vdm_unlocked(port, header, data, count - 1);
> + tcpm_queue_vdm_unlocked(port, header, data, count - 1, TCPC_TX_SOP);
>
> return 0;
> }
> @@ -2768,6 +2800,58 @@ static const struct typec_altmode_ops tcpm_altmode_ops = {
> .vdm = tcpm_altmode_vdm,
> };
>
> +
> +static int tcpm_cable_altmode_enter(struct typec_altmode *altmode, enum typec_plug_index sop,
> + u32 *vdo)
> +{
> + struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
> + int svdm_version;
> + u32 header;
> +
> + svdm_version = typec_get_cable_svdm_version(port->typec_port);
> + if (svdm_version < 0)
> + return svdm_version;
> +
> + header = VDO(altmode->svid, vdo ? 2 : 1, svdm_version, CMD_ENTER_MODE);
> + header |= VDO_OPOS(altmode->mode);
> +
> + tcpm_queue_vdm_unlocked(port, header, vdo, vdo ? 1 : 0, TCPC_TX_SOP_PRIME);
> + return 0;
> +}
> +
> +static int tcpm_cable_altmode_exit(struct typec_altmode *altmode, enum typec_plug_index sop)
> +{
> + struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
> + int svdm_version;
> + u32 header;
> +
> + svdm_version = typec_get_cable_svdm_version(port->typec_port);
> + if (svdm_version < 0)
> + return svdm_version;
> +
> + header = VDO(altmode->svid, 1, svdm_version, CMD_EXIT_MODE);
> + header |= VDO_OPOS(altmode->mode);
> +
> + tcpm_queue_vdm_unlocked(port, header, NULL, 0, TCPC_TX_SOP_PRIME);
> + return 0;
> +}
> +
> +static int tcpm_cable_altmode_vdm(struct typec_altmode *altmode, enum typec_plug_index sop,
> + u32 header, const u32 *data, int count)
> +{
> + struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
> +
> + tcpm_queue_vdm_unlocked(port, header, data, count - 1, TCPC_TX_SOP_PRIME);
> +
> + return 0;
> +}
> +
> +static const struct typec_cable_ops tcpm_cable_ops = {
> + .enter = tcpm_cable_altmode_enter,
> + .exit = tcpm_cable_altmode_exit,
> + .vdm = tcpm_cable_altmode_vdm,
> +};
> +
> /*
> * PD (data, control) command handling functions
> */
> @@ -7507,6 +7591,8 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
> typec_port_register_altmodes(port->typec_port,
> &tcpm_altmode_ops, port,
> port->port_altmode, ALTMODE_DISCOVERY_MAX);
> + typec_port_register_cable_ops(port->port_altmode, ARRAY_SIZE(port->port_altmode),
> + &tcpm_cable_ops);
> port->registered = true;
>
> mutex_lock(&port->lock);
> --
> 2.43.0.472.g3155946c3a-goog

--
heikki