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platform/chrome: cros_ec_typec: Get retimer handle

Browse source 
Where available, obtain the handle to retimer switch specified via
firmware, and update the mux configuration callsites to add retimer
support for supported modes.

Signed-off-by: Prashant Malani <pmalani@chromium.org>
Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://lore.kernel.org/r/20220816214857.2088914-8-pmalani@chromium.org
This commit is contained in:
Prashant Malani 2022-08-16 21:48:35 +00:00
parent d5f66527db
commit 1a8912caba
1 changed files with 41 additions and 3 deletions
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44
drivers/platform/chrome/cros_ec_typec.c
View file

@ -20,6 +20,7 @@
#include <linux/usb/typec_altmode.h>
#include <linux/usb/typec_dp.h>
#include <linux/usb/typec_mux.h>
#include <linux/usb/typec_retimer.h>
#include <linux/usb/typec_tbt.h>
#include <linux/usb/role.h>
@ -55,6 +56,7 @@ struct cros_typec_port {
struct usb_pd_identity c_identity;
struct typec_switch *ori_sw;
struct typec_mux *mux;
struct typec_retimer *retimer;
struct usb_role_switch *role_sw;
/* Variables keeping track of switch state. */
@ -143,6 +145,12 @@ static int cros_typec_get_switch_handles(struct cros_typec_port *port,
goto mux_err;
}
port->retimer = fwnode_typec_retimer_get(fwnode);
if (IS_ERR(port->retimer)) {
dev_dbg(dev, "Retimer handle not found.\n");
goto retimer_sw_err;
}
port->ori_sw = fwnode_typec_switch_get(fwnode);
if (IS_ERR(port->ori_sw)) {
dev_dbg(dev, "Orientation switch handle not found.\n");
@ -160,6 +168,8 @@ static int cros_typec_get_switch_handles(struct cros_typec_port *port,
role_sw_err:
typec_switch_put(port->ori_sw);
ori_sw_err:
typec_retimer_put(port->retimer);
retimer_sw_err:
typec_mux_put(port->mux);
mux_err:
return -ENODEV;
@ -204,6 +214,21 @@ static void cros_typec_unregister_altmodes(struct cros_typec_data *typec, int po
}
}
/*
* Map the Type-C Mux state to retimer state and call the retimer set function. We need this
* because we re-use the Type-C mux state for retimers.
*/
static int cros_typec_retimer_set(struct typec_retimer *retimer, struct typec_mux_state state)
{
struct typec_retimer_state rstate = {
.alt = state.alt,
.mode = state.mode,
.data = state.data,
};
return typec_retimer_set(retimer, &rstate);
}
static int cros_typec_usb_disconnect_state(struct cros_typec_port *port)
{
port->state.alt = NULL;
@ -212,6 +237,7 @@ static int cros_typec_usb_disconnect_state(struct cros_typec_port *port)
usb_role_switch_set_role(port->role_sw, USB_ROLE_NONE);
typec_switch_set(port->ori_sw, TYPEC_ORIENTATION_NONE);
cros_typec_retimer_set(port->retimer, port->state);
return typec_mux_set(port->mux, &port->state);
}
@ -409,9 +435,14 @@ static int cros_typec_init_ports(struct cros_typec_data *typec)
static int cros_typec_usb_safe_state(struct cros_typec_port *port)
{
int ret;
port->state.mode = TYPEC_STATE_SAFE;
return typec_mux_set(port->mux, &port->state);
ret = cros_typec_retimer_set(port->retimer, port->state);
if (!ret)
ret = typec_mux_set(port->mux, &port->state);
return ret;
}
/*
@ -508,7 +539,11 @@ static int cros_typec_enable_dp(struct cros_typec_data *typec,
port->state.data = &dp_data;
port->state.mode = TYPEC_MODAL_STATE(ffs(pd_ctrl->dp_mode));
return typec_mux_set(port->mux, &port->state);
ret = cros_typec_retimer_set(port->retimer, port->state);
if (!ret)
ret = typec_mux_set(port->mux, &port->state);
return ret;
}
static int cros_typec_enable_usb4(struct cros_typec_data *typec,
@ -597,7 +632,10 @@ static int cros_typec_configure_mux(struct cros_typec_data *typec, int port_num,
} else if (port->mux_flags & USB_PD_MUX_USB_ENABLED) {
port->state.alt = NULL;
port->state.mode = TYPEC_STATE_USB;
ret = typec_mux_set(port->mux, &port->state);
ret = cros_typec_retimer_set(port->retimer, port->state);
if (!ret)
ret = typec_mux_set(port->mux, &port->state);
} else {
dev_dbg(typec->dev,
"Unrecognized mode requested, mux flags: %x\n",