On Thu, Jun 06, 2024 at 03:11:15PM +0200, Neil Armstrong wrote: > 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@xxxxxxxxxxxxx> > Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx> Reviewed-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > --- > > Reported Tested by Luca in [1] > > [1] https://lore.kernel.org/all/D1HOCBW6RG72.1B2RKGKW2Q5VC@xxxxxxxxxxxxx/ > --- > drivers/usb/typec/mux/ptn36502.c | 24 ++++++++++++++++++++++-- > 1 file changed, 22 insertions(+), 2 deletions(-) > > diff --git a/drivers/usb/typec/mux/ptn36502.c b/drivers/usb/typec/mux/ptn36502.c > index 88136a6d6f31..129d9d24b932 100644 > --- a/drivers/usb/typec/mux/ptn36502.c > +++ b/drivers/usb/typec/mux/ptn36502.c > @@ -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); > } > > > -- > 2.34.1 -- heikki
