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usb: typec-mux: ptn36502: broadcast typec state to next mux

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In the Type-C graph, the ptn36502 retimer is in between the USB-C
connector and the USB3/DP combo PHY, and this PHY also requires the
USB-C mode events to properly set-up the SuperSpeed Lanes functions
to setup USB3-only, USB3 + DP Altmode or DP Altmode only on the 4 lanes.

Update the ptn36502 retimer to get an optional type-c mux on the next
endpoint, and broadcast the received mode to it.

Tested-by: Luca Weiss <luca.weiss@fairphone.com>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20240606-topic-sm8x50-upstream-retimer-broadcast-mode-v2-3-c6f6eae479c3@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Neil Armstrong
2024-06-06 15:11:15 +02:00
committed by Greg Kroah-Hartman
parent 74b64e760e
commit a96abf3bad
1 changed files with 22 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/usb/typec/mux/ptn36502.c
View File

@@ -67,6 +67,7 @@ struct ptn36502 {
struct typec_retimer *retimer;
struct typec_switch *typec_switch;
struct typec_mux *typec_mux;
struct mutex lock; /* protect non-concurrent retimer & switch */
@@ -235,6 +236,7 @@ static int ptn36502_sw_set(struct typec_switch_dev *sw, enum typec_orientation o
static int ptn36502_retimer_set(struct typec_retimer *retimer, struct typec_retimer_state *state)
{
struct ptn36502 *ptn = typec_retimer_get_drvdata(retimer);
struct typec_mux_state mux_state;
int ret = 0;
mutex_lock(&ptn->lock);
@@ -252,7 +254,14 @@ static int ptn36502_retimer_set(struct typec_retimer *retimer, struct typec_reti
mutex_unlock(&ptn->lock);
return ret;
if (ret)
return ret;
mux_state.alt = state->alt;
mux_state.data = state->data;
mux_state.mode = state->mode;
return typec_mux_set(ptn->typec_mux, &mux_state);
}
static int ptn36502_detect(struct ptn36502 *ptn)
@@ -321,10 +330,17 @@ static int ptn36502_probe(struct i2c_client *client)
return dev_err_probe(dev, PTR_ERR(ptn->typec_switch),
"Failed to acquire orientation-switch\n");
ptn->typec_mux = fwnode_typec_mux_get(dev->fwnode);
if (IS_ERR(ptn->typec_mux)) {
ret = dev_err_probe(dev, PTR_ERR(ptn->typec_mux),
"Failed to acquire mode-switch\n");
goto err_switch_put;
}
ret = regulator_enable(ptn->vdd18_supply);
if (ret) {
ret = dev_err_probe(dev, ret, "Failed to enable vdd18\n");
goto err_switch_put;
goto err_mux_put;
}
ret = ptn36502_detect(ptn);
@@ -365,6 +381,9 @@ static int ptn36502_probe(struct i2c_client *client)
err_disable_regulator:
regulator_disable(ptn->vdd18_supply);
err_mux_put:
typec_mux_put(ptn->typec_mux);
err_switch_put:
typec_switch_put(ptn->typec_switch);
@@ -380,6 +399,7 @@ static void ptn36502_remove(struct i2c_client *client)
regulator_disable(ptn->vdd18_supply);
typec_mux_put(ptn->typec_mux);
typec_switch_put(ptn->typec_switch);
}