Re: [PATCH v5 1/8] usb: typec: Only use SVID for matching altmodes

[Benson Leung <bleung@google.com>]

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On Fri, Dec 13, 2024 at 03:35:42PM -0800, Abhishek Pandit-Subedi wrote:
> Mode in struct typec_altmode is used to indicate the index of the
> altmode on a port, partner or plug. It is used in enter mode VDMs but
> doesn't make much sense for matching against altmode drivers or for
> matching partner to port altmodes.
> 
> Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

Reviewed-by: Benson Leung <bleung@chromium.org>

> ---
> 
> Changes in v5:
> - Rebase with module_alias_printf
> 
> Changes in v3:
> - Removed mode from altmode device ids
> - Updated modalias for typecd bus to remove mode
> - Re-ordered to start of series
> 
> Changes in v2:
> - Update altmode_match to ignore mode entirely
> - Also apply the same behavior to typec_match
> 
>  drivers/usb/typec/altmodes/displayport.c | 2 +-
>  drivers/usb/typec/altmodes/nvidia.c      | 2 +-
>  drivers/usb/typec/bus.c                  | 6 ++----
>  drivers/usb/typec/class.c                | 4 ++--
>  scripts/mod/devicetable-offsets.c        | 1 -
>  scripts/mod/file2alias.c                 | 9 ++-------
>  6 files changed, 8 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/usb/typec/altmodes/displayport.c b/drivers/usb/typec/altmodes/displayport.c
> index 2f03190a9873..3245e03d59e6 100644
> --- a/drivers/usb/typec/altmodes/displayport.c
> +++ b/drivers/usb/typec/altmodes/displayport.c
> @@ -791,7 +791,7 @@ void dp_altmode_remove(struct typec_altmode *alt)
>  EXPORT_SYMBOL_GPL(dp_altmode_remove);
>  
>  static const struct typec_device_id dp_typec_id[] = {
> -	{ USB_TYPEC_DP_SID, USB_TYPEC_DP_MODE },
> +	{ USB_TYPEC_DP_SID },
>  	{ },
>  };
>  MODULE_DEVICE_TABLE(typec, dp_typec_id);
> diff --git a/drivers/usb/typec/altmodes/nvidia.c b/drivers/usb/typec/altmodes/nvidia.c
> index fe70b36f078f..2b77d931e494 100644
> --- a/drivers/usb/typec/altmodes/nvidia.c
> +++ b/drivers/usb/typec/altmodes/nvidia.c
> @@ -24,7 +24,7 @@ static void nvidia_altmode_remove(struct typec_altmode *alt)
>  }
>  
>  static const struct typec_device_id nvidia_typec_id[] = {
> -	{ USB_TYPEC_NVIDIA_VLINK_SID, TYPEC_ANY_MODE },
> +	{ USB_TYPEC_NVIDIA_VLINK_SID },
>  	{ },
>  };
>  MODULE_DEVICE_TABLE(typec, nvidia_typec_id);
> diff --git a/drivers/usb/typec/bus.c b/drivers/usb/typec/bus.c
> index aa879253d3b8..ae90688d23e4 100644
> --- a/drivers/usb/typec/bus.c
> +++ b/drivers/usb/typec/bus.c
> @@ -454,8 +454,7 @@ static int typec_match(struct device *dev, const struct device_driver *driver)
>  	const struct typec_device_id *id;
>  
>  	for (id = drv->id_table; id->svid; id++)
> -		if (id->svid == altmode->svid &&
> -		    (id->mode == TYPEC_ANY_MODE || id->mode == altmode->mode))
> +		if (id->svid == altmode->svid)
>  			return 1;
>  	return 0;
>  }
> @@ -470,8 +469,7 @@ static int typec_uevent(const struct device *dev, struct kobj_uevent_env *env)
>  	if (add_uevent_var(env, "MODE=%u", altmode->mode))
>  		return -ENOMEM;
>  
> -	return add_uevent_var(env, "MODALIAS=typec:id%04Xm%02X",
> -			      altmode->svid, altmode->mode);
> +	return add_uevent_var(env, "MODALIAS=typec:id%04X", altmode->svid);
>  }
>  
>  static int typec_altmode_create_links(struct altmode *alt)
> diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
> index 4b3047e055a3..febe453b96be 100644
> --- a/drivers/usb/typec/class.c
> +++ b/drivers/usb/typec/class.c
> @@ -237,13 +237,13 @@ static int altmode_match(struct device *dev, void *data)
>  	if (!is_typec_altmode(dev))
>  		return 0;
>  
> -	return ((adev->svid == id->svid) && (adev->mode == id->mode));
> +	return (adev->svid == id->svid);
>  }
>  
>  static void typec_altmode_set_partner(struct altmode *altmode)
>  {
>  	struct typec_altmode *adev = &altmode->adev;
> -	struct typec_device_id id = { adev->svid, adev->mode, };
> +	struct typec_device_id id = { adev->svid };
>  	struct typec_port *port = typec_altmode2port(adev);
>  	struct altmode *partner;
>  	struct device *dev;
> diff --git a/scripts/mod/devicetable-offsets.c b/scripts/mod/devicetable-offsets.c
> index 9c7b404defbd..d3d00e85edf7 100644
> --- a/scripts/mod/devicetable-offsets.c
> +++ b/scripts/mod/devicetable-offsets.c
> @@ -237,7 +237,6 @@ int main(void)
>  
>  	DEVID(typec_device_id);
>  	DEVID_FIELD(typec_device_id, svid);
> -	DEVID_FIELD(typec_device_id, mode);
>  
>  	DEVID(tee_client_device_id);
>  	DEVID_FIELD(tee_client_device_id, uuid);
> diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
> index 5b5745f00eb3..7049c31062c6 100644
> --- a/scripts/mod/file2alias.c
> +++ b/scripts/mod/file2alias.c
> @@ -1221,17 +1221,12 @@ static void do_tbsvc_entry(struct module *mod, void *symval)
>  	module_alias_printf(mod, true, "tbsvc:%s", alias);
>  }
>  
> -/* Looks like: typec:idNmN */
> +/* Looks like: typec:idN */
>  static void do_typec_entry(struct module *mod, void *symval)
>  {
> -	char alias[256] = {};
> -
>  	DEF_FIELD(symval, typec_device_id, svid);
> -	DEF_FIELD(symval, typec_device_id, mode);
> -
> -	ADD(alias, "m", mode != TYPEC_ANY_MODE, mode);
>  
> -	module_alias_printf(mod, false, "typec:id%04X%s", svid, alias);
> +	module_alias_printf(mod, false, "typec:id%04X", svid);
>  }
>  
>  /* Looks like: tee:uuid */
> -- 
> 2.47.1.613.gc27f4b7a9f-goog
> 
> 

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