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platform/chrome: cros_ec_typec: Register port altmodes 

Instead of using manually managed altmode structs, register the port's
altmodes with the Type-C framework. This facilitates matching them to
partner altmodes later.

Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Prashant Malani <pmalani@chromium.org>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20220712210318.2671292-2-pmalani@chromium.org
This commit is contained in:
Prashant Malani 2022-07-12 21:03:18 +00:00
Родитель a47bc5a0c4
Коммит 1ff5d97f07
1 изменённых файлов: 40 добавлений и 11 удалений
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51
drivers/platform/chrome/cros_ec_typec.c
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@ -25,6 +25,8 @@
#define DRV_NAME "cros-ec-typec"
#define DP_PORT_VDO (BIT(DP_PIN_ASSIGN_C) | BIT(DP_PIN_ASSIGN_D) | DP_CAP_DFP_D)
/* Supported alt modes. */
enum {
CROS_EC_ALTMODE_DP = 0,
@ -60,7 +62,7 @@ struct cros_typec_port {
uint8_t mux_flags;
uint8_t role;
struct typec_altmode port_altmode[CROS_EC_ALTMODE_MAX];
struct typec_altmode *port_altmode[CROS_EC_ALTMODE_MAX];
/* Flag indicating that PD partner discovery data parsing is completed. */
bool sop_disc_done;
@ -253,6 +255,14 @@ static void cros_typec_remove_cable(struct cros_typec_data *typec,
port->sop_prime_disc_done = false;
}
static void cros_typec_unregister_port_altmodes(struct cros_typec_port *port)
{
int i;
for (i = 0; i < CROS_EC_ALTMODE_MAX; i++)
typec_unregister_altmode(port->port_altmode[i]);
}
static void cros_unregister_ports(struct cros_typec_data *typec)
{
int i;
@ -267,34 +277,49 @@ static void cros_unregister_ports(struct cros_typec_data *typec)
usb_role_switch_put(typec->ports[i]->role_sw);
typec_switch_put(typec->ports[i]->ori_sw);
typec_mux_put(typec->ports[i]->mux);
cros_typec_unregister_port_altmodes(typec->ports[i]);
typec_unregister_port(typec->ports[i]->port);
}
}
/*
* Fake the alt mode structs until we actually start registering Type C port
* and partner alt modes.
* Register port alt modes with known values till we start retrieving
* port capabilities from the EC.
*/
static void cros_typec_register_port_altmodes(struct cros_typec_data *typec,
static int cros_typec_register_port_altmodes(struct cros_typec_data *typec,
int port_num)
{
struct cros_typec_port *port = typec->ports[port_num];
struct typec_altmode_desc desc;
struct typec_altmode *amode;
/* All PD capable CrOS devices are assumed to support DP altmode. */
port->port_altmode[CROS_EC_ALTMODE_DP].svid = USB_TYPEC_DP_SID;
port->port_altmode[CROS_EC_ALTMODE_DP].mode = USB_TYPEC_DP_MODE;
desc.svid = USB_TYPEC_DP_SID,
desc.mode = USB_TYPEC_DP_MODE,
desc.vdo = DP_PORT_VDO,
amode = typec_port_register_altmode(port->port, &desc);
if (IS_ERR(amode))
return PTR_ERR(amode);
port->port_altmode[CROS_EC_ALTMODE_DP] = amode;
/*
* Register TBT compatibility alt mode. The EC will not enter the mode
* if it doesn't support it, so it's safe to register it unconditionally
* here for now.
*/
port->port_altmode[CROS_EC_ALTMODE_TBT].svid = USB_TYPEC_TBT_SID;
port->port_altmode[CROS_EC_ALTMODE_TBT].mode = TYPEC_ANY_MODE;
memset(&desc, 0, sizeof(desc));
desc.svid = USB_TYPEC_TBT_SID,
desc.mode = TYPEC_ANY_MODE,
amode = typec_port_register_altmode(port->port, &desc);
if (IS_ERR(amode))
return PTR_ERR(amode);
port->port_altmode[CROS_EC_ALTMODE_TBT] = amode;
port->state.alt = NULL;
port->state.mode = TYPEC_STATE_USB;
port->state.data = NULL;
return 0;
}
static int cros_typec_init_ports(struct cros_typec_data *typec)
@ -361,7 +386,11 @@ static int cros_typec_init_ports(struct cros_typec_data *typec)
dev_dbg(dev, "No switch control for port %d\n",
port_num);
cros_typec_register_port_altmodes(typec, port_num);
ret = cros_typec_register_port_altmodes(typec, port_num);
if (ret) {
dev_err(dev, "Failed to register port altmodes\n");
goto unregister_ports;
}
cros_port->disc_data = devm_kzalloc(dev, EC_PROTO2_MAX_RESPONSE_SIZE, GFP_KERNEL);
if (!cros_port->disc_data) {
@ -430,7 +459,7 @@ static int cros_typec_enable_tbt(struct cros_typec_data *typec,
data.enter_vdo |= TBT_ENTER_MODE_ACTIVE_CABLE;
if (!port->state.alt) {
port->state.alt = &port->port_altmode[CROS_EC_ALTMODE_TBT];
port->state.alt = port->port_altmode[CROS_EC_ALTMODE_TBT];
ret = cros_typec_usb_safe_state(port);
if (ret)
return ret;
@ -472,7 +501,7 @@ static int cros_typec_enable_dp(struct cros_typec_data *typec,
/* Configuration VDO. */
dp_data.conf = DP_CONF_SET_PIN_ASSIGN(pd_ctrl->dp_mode);
if (!port->state.alt) {
port->state.alt = &port->port_altmode[CROS_EC_ALTMODE_DP];
port->state.alt = port->port_altmode[CROS_EC_ALTMODE_DP];
ret = cros_typec_usb_safe_state(port);
if (ret)
return ret;