Re: [PATCH 2/2] usb: typec-mux: nb7vpq904m: broadcast typec state to next mux

[Neil Armstrong <neil.armstrong@xxxxxxxxxx>]

On 27/05/2024 11:18, Dmitry Baryshkov wrote:
> On Mon, May 27, 2024 at 09:45:30AM +0200, Neil Armstrong wrote:
> > In the Type-C graph, the nb7vpq904m 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 nb7vpq904m retimer to get an optional type-c mux on the next
> > endpoint, and broadcast the received mode to it.
> >
> > Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
> > ---
> >   drivers/usb/typec/mux/nb7vpq904m.c | 29 +++++++++++++++++++++++++++--
> >   1 file changed, 27 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/usb/typec/mux/nb7vpq904m.c b/drivers/usb/typec/mux/nb7vpq904m.c
> > index b17826713753..efb10f890fed 100644
> > --- a/drivers/usb/typec/mux/nb7vpq904m.c
> > +++ b/drivers/usb/typec/mux/nb7vpq904m.c
> > @@ -69,6 +69,7 @@ struct nb7vpq904m {
> >   
> >   	bool swap_data_lanes;
> >   	struct typec_switch *typec_switch;
> > +	struct typec_mux *typec_mux;
> >   
> >   	struct mutex lock; /* protect non-concurrent retimer & switch */
> >   
> > @@ -275,6 +276,7 @@ static int nb7vpq904m_sw_set(struct typec_switch_dev *sw, enum typec_orientation
> >   static int nb7vpq904m_retimer_set(struct typec_retimer *retimer, struct typec_retimer_state *state)
> >   {
> >   	struct nb7vpq904m *nb7 = typec_retimer_get_drvdata(retimer);
> > +	struct typec_mux_state mux_state;
> >   	int ret = 0;
> >   
> >   	mutex_lock(&nb7->lock);
> > @@ -292,7 +294,14 @@ static int nb7vpq904m_retimer_set(struct typec_retimer *retimer, struct typec_re
> >   
> >   	mutex_unlock(&nb7->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(nb7->typec_mux, &mux_state);
> >   }
> >   
> >   static const struct regmap_config nb7_regmap = {
> > @@ -411,9 +420,16 @@ static int nb7vpq904m_probe(struct i2c_client *client)
> >   		return dev_err_probe(dev, PTR_ERR(nb7->typec_switch),
> >   				     "failed to acquire orientation-switch\n");
> >   
> > +	nb7->typec_mux = fwnode_typec_mux_get(dev->fwnode);
> > +	if (IS_ERR(nb7->typec_mux)) {
> > +		ret = dev_err_probe(dev, PTR_ERR(nb7->typec_mux),
> > +				    "Failed to acquire mode-switch\n");
> > +		goto err_switch_put;
> > +	}
> > +
> >   	ret = nb7vpq904m_parse_data_lanes_mapping(nb7);
> >   	if (ret)
> > -		return ret;
> > +		goto err_mux_put;
> >   
> >   	ret = regulator_enable(nb7->vcc_supply);
> >   	if (ret)
> > @@ -456,6 +472,12 @@ static int nb7vpq904m_probe(struct i2c_client *client)
> >   	gpiod_set_value(nb7->enable_gpio, 0);
> >   	regulator_disable(nb7->vcc_supply);
> >   
> > +err_mux_put:
> > +	typec_mux_put(nb7->typec_mux);
> > +
> > +err_switch_put:
> > +	typec_switch_put(nb7->typec_switch);
>
> Same comment, typec_switch_put should go to a separate commit. IMHO it
> almost begs us to have devm_fwnode_typec_mux_get() and
> devm_fwnode_typec_switch_get().

Yep

Thx,
Neil

> > +
> >   	return ret;
> >   }
> >   
> > @@ -469,6 +491,9 @@ static void nb7vpq904m_remove(struct i2c_client *client)
> >   	gpiod_set_value(nb7->enable_gpio, 0);
> >   
> >   	regulator_disable(nb7->vcc_supply);
> > +
> > +	typec_mux_put(nb7->typec_mux);
> > +	typec_switch_put(nb7->typec_switch);
> >   }
> >   
> >   static const struct i2c_device_id nb7vpq904m_table[] = {
> >
> > --
> > 2.34.1