[PATCH] usb: typec: tipd: Disable mode control for CD321x

[PATCH] usb: typec: tipd: Disable mode control for CD321x

[Sven Peter]

Apple's CD321X firmware controls which alternate mode is entered and
cannot be influenced from Linux. Set the no_mode_control capability to
accurately reflect this to the typec subsystem.

Signed-off-by: Sven Peter <sven@kernel.org>
---
 drivers/usb/typec/tipd/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c
index 522f56742aa9..8fdb37e288b4 100644
--- a/drivers/usb/typec/tipd/core.c
+++ b/drivers/usb/typec/tipd/core.c
@@ -151,6 +151,7 @@ struct tipd_data {
 	irq_handler_t irq_handler;
 	u64 irq_mask1;
 	size_t tps_struct_size;
+	bool no_mode_control;
 	void (*remove)(struct tps6598x *tps);
 	int (*register_port)(struct tps6598x *tps, struct fwnode_handle *node);
 	void (*unregister_port)(struct tps6598x *tps);
@@ -1242,6 +1243,7 @@ tps6598x_register_port(struct tps6598x *tps, struct fwnode_handle *fwnode)
 	typec_cap.driver_data = tps;
 	typec_cap.ops = &tps6598x_ops;
 	typec_cap.fwnode = fwnode;
+	typec_cap.no_mode_control = tps->data->no_mode_control;
 
 	switch (TPS_SYSCONF_PORTINFO(conf)) {
 	case TPS_PORTINFO_SINK_ACCESSORY:
@@ -2015,6 +2017,7 @@ static const struct tipd_data cd321x_data = {
 		     APPLE_CD_REG_INT_DATA_STATUS_UPDATE |
 		     APPLE_CD_REG_INT_PLUG_EVENT,
 	.tps_struct_size = sizeof(struct cd321x),
+	.no_mode_control = true,
 	.remove = cd321x_remove,
 	.register_port = cd321x_register_port,
 	.unregister_port = cd321x_unregister_port,

---
base-commit: cee9395acd8043be0644b25c34bfa86623f2b935
change-id: 20260906-b4-tipd-mode-ctrl-80835d9e3f72

Best regards,
--  
Sven Peter <sven@kernel.org>

Re: [PATCH] usb: typec: tipd: Disable mode control for CD321x

[Heikki Krogerus]

On Sun, Sep 06, 2026 at 02:24:00PM +0200, Sven Peter wrote:
> Apple's CD321X firmware controls which alternate mode is entered and
> cannot be influenced from Linux. Set the no_mode_control capability to
> accurately reflect this to the typec subsystem.
> 
> Signed-off-by: Sven Peter <sven@kernel.org>

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

> ---
>  drivers/usb/typec/tipd/core.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c
> index 522f56742aa9..8fdb37e288b4 100644
> --- a/drivers/usb/typec/tipd/core.c
> +++ b/drivers/usb/typec/tipd/core.c
> @@ -151,6 +151,7 @@ struct tipd_data {
>  	irq_handler_t irq_handler;
>  	u64 irq_mask1;
>  	size_t tps_struct_size;
> +	bool no_mode_control;
>  	void (*remove)(struct tps6598x *tps);
>  	int (*register_port)(struct tps6598x *tps, struct fwnode_handle *node);
>  	void (*unregister_port)(struct tps6598x *tps);
> @@ -1242,6 +1243,7 @@ tps6598x_register_port(struct tps6598x *tps, struct fwnode_handle *fwnode)
>  	typec_cap.driver_data = tps;
>  	typec_cap.ops = &tps6598x_ops;
>  	typec_cap.fwnode = fwnode;
> +	typec_cap.no_mode_control = tps->data->no_mode_control;
>  
>  	switch (TPS_SYSCONF_PORTINFO(conf)) {
>  	case TPS_PORTINFO_SINK_ACCESSORY:
> @@ -2015,6 +2017,7 @@ static const struct tipd_data cd321x_data = {
>  		     APPLE_CD_REG_INT_DATA_STATUS_UPDATE |
>  		     APPLE_CD_REG_INT_PLUG_EVENT,
>  	.tps_struct_size = sizeof(struct cd321x),
> +	.no_mode_control = true,
>  	.remove = cd321x_remove,
>  	.register_port = cd321x_register_port,
>  	.unregister_port = cd321x_unregister_port,
> 
> ---
> base-commit: cee9395acd8043be0644b25c34bfa86623f2b935
> change-id: 20260906-b4-tipd-mode-ctrl-80835d9e3f72
> 
> Best regards,
> --  
> Sven Peter <sven@kernel.org>
> 

-- 
heikki