Re: [PATCH 1/3] usb: typec: tcpm: Remove tcpc_config configuration mechanism

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On Fri, Oct 18, 2019 at 09:57:17PM +0200, Hans de Goede wrote:
> All configuration can and should be done through fwnodes instead of
> through the tcpc_config struct and there are no existing users left of
> struct tcpc_config, so lets remove it.
> 
> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>

Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>

> ---
>  drivers/usb/typec/tcpm/tcpm.c | 90 ++---------------------------------
>  include/linux/usb/tcpm.h      | 41 ----------------
>  2 files changed, 3 insertions(+), 128 deletions(-)
> 
> diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
> index 5f61d9977a15..c5fa18759f8e 100644
> --- a/drivers/usb/typec/tcpm/tcpm.c
> +++ b/drivers/usb/typec/tcpm/tcpm.c
> @@ -380,9 +380,6 @@ static enum tcpm_state tcpm_default_state(struct tcpm_port *port)
>  			return SNK_UNATTACHED;
>  		else if (port->try_role == TYPEC_SOURCE)
>  			return SRC_UNATTACHED;
> -		else if (port->tcpc->config &&
> -			 port->tcpc->config->default_role == TYPEC_SINK)
> -			return SNK_UNATTACHED;
>  		/* Fall through to return SRC_UNATTACHED */
>  	} else if (port->port_type == TYPEC_PORT_SNK) {
>  		return SNK_UNATTACHED;
> @@ -4131,7 +4128,7 @@ static int tcpm_try_role(const struct typec_capability *cap, int role)
>  	mutex_lock(&port->lock);
>  	if (tcpc->try_role)
>  		ret = tcpc->try_role(tcpc, role);
> -	if (!ret && (!tcpc->config || !tcpc->config->try_role_hw))
> +	if (!ret)
>  		port->try_role = role;
>  	port->try_src_count = 0;
>  	port->try_snk_count = 0;
> @@ -4368,34 +4365,6 @@ void tcpm_tcpc_reset(struct tcpm_port *port)
>  }
>  EXPORT_SYMBOL_GPL(tcpm_tcpc_reset);
>  
> -static int tcpm_copy_pdos(u32 *dest_pdo, const u32 *src_pdo,
> -			  unsigned int nr_pdo)
> -{
> -	unsigned int i;
> -
> -	if (nr_pdo > PDO_MAX_OBJECTS)
> -		nr_pdo = PDO_MAX_OBJECTS;
> -
> -	for (i = 0; i < nr_pdo; i++)
> -		dest_pdo[i] = src_pdo[i];
> -
> -	return nr_pdo;
> -}
> -
> -static int tcpm_copy_vdos(u32 *dest_vdo, const u32 *src_vdo,
> -			  unsigned int nr_vdo)
> -{
> -	unsigned int i;
> -
> -	if (nr_vdo > VDO_MAX_OBJECTS)
> -		nr_vdo = VDO_MAX_OBJECTS;
> -
> -	for (i = 0; i < nr_vdo; i++)
> -		dest_vdo[i] = src_vdo[i];
> -
> -	return nr_vdo;
> -}
> -
>  static int tcpm_fw_get_caps(struct tcpm_port *port,
>  			    struct fwnode_handle *fwnode)
>  {
> @@ -4698,35 +4667,10 @@ static int devm_tcpm_psy_register(struct tcpm_port *port)
>  	return PTR_ERR_OR_ZERO(port->psy);
>  }
>  
> -static int tcpm_copy_caps(struct tcpm_port *port,
> -			  const struct tcpc_config *tcfg)
> -{
> -	if (tcpm_validate_caps(port, tcfg->src_pdo, tcfg->nr_src_pdo) ||
> -	    tcpm_validate_caps(port, tcfg->snk_pdo, tcfg->nr_snk_pdo))
> -		return -EINVAL;
> -
> -	port->nr_src_pdo = tcpm_copy_pdos(port->src_pdo, tcfg->src_pdo,
> -					  tcfg->nr_src_pdo);
> -	port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, tcfg->snk_pdo,
> -					  tcfg->nr_snk_pdo);
> -
> -	port->nr_snk_vdo = tcpm_copy_vdos(port->snk_vdo, tcfg->snk_vdo,
> -					  tcfg->nr_snk_vdo);
> -
> -	port->operating_snk_mw = tcfg->operating_snk_mw;
> -
> -	port->typec_caps.prefer_role = tcfg->default_role;
> -	port->typec_caps.type = tcfg->type;
> -	port->typec_caps.data = tcfg->data;
> -	port->self_powered = tcfg->self_powered;
> -
> -	return 0;
> -}
> -
>  struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
>  {
>  	struct tcpm_port *port;
> -	int i, err;
> +	int err;
>  
>  	if (!dev || !tcpc ||
>  	    !tcpc->get_vbus || !tcpc->set_cc || !tcpc->get_cc ||
> @@ -4759,15 +4703,10 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
>  	tcpm_debugfs_init(port);
>  
>  	err = tcpm_fw_get_caps(port, tcpc->fwnode);
> -	if ((err < 0) && tcpc->config)
> -		err = tcpm_copy_caps(port, tcpc->config);
>  	if (err < 0)
>  		goto out_destroy_wq;
>  
> -	if (!tcpc->config || !tcpc->config->try_role_hw)
> -		port->try_role = port->typec_caps.prefer_role;
> -	else
> -		port->try_role = TYPEC_NO_PREFERRED_ROLE;
> +	port->try_role = port->typec_caps.prefer_role;
>  
>  	port->typec_caps.fwnode = tcpc->fwnode;
>  	port->typec_caps.revision = 0x0120;	/* Type-C spec release 1.2 */
> @@ -4797,29 +4736,6 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
>  		goto out_role_sw_put;
>  	}
>  
> -	if (tcpc->config && tcpc->config->alt_modes) {
> -		const struct typec_altmode_desc *paltmode = tcpc->config->alt_modes;
> -
> -		i = 0;
> -		while (paltmode->svid && i < ARRAY_SIZE(port->port_altmode)) {
> -			struct typec_altmode *alt;
> -
> -			alt = typec_port_register_altmode(port->typec_port,
> -							  paltmode);
> -			if (IS_ERR(alt)) {
> -				tcpm_log(port,
> -					 "%s: failed to register port alternate mode 0x%x",
> -					 dev_name(dev), paltmode->svid);
> -				break;
> -			}
> -			typec_altmode_set_drvdata(alt, port);
> -			alt->ops = &tcpm_altmode_ops;
> -			port->port_altmode[i] = alt;
> -			i++;
> -			paltmode++;
> -		}
> -	}
> -
>  	mutex_lock(&port->lock);
>  	tcpm_init(port);
>  	mutex_unlock(&port->lock);
> diff --git a/include/linux/usb/tcpm.h b/include/linux/usb/tcpm.h
> index f516955a0cf4..e7979c01c351 100644
> --- a/include/linux/usb/tcpm.h
> +++ b/include/linux/usb/tcpm.h
> @@ -46,45 +46,6 @@ enum tcpm_transmit_type {
>  	TCPC_TX_BIST_MODE_2 = 7
>  };
>  
> -/**
> - * struct tcpc_config - Port configuration
> - * @src_pdo:	PDO parameters sent to port partner as response to
> - *		PD_CTRL_GET_SOURCE_CAP message
> - * @nr_src_pdo:	Number of entries in @src_pdo
> - * @snk_pdo:	PDO parameters sent to partner as response to
> - *		PD_CTRL_GET_SINK_CAP message
> - * @nr_snk_pdo:	Number of entries in @snk_pdo
> - * @operating_snk_mw:
> - *		Required operating sink power in mW
> - * @type:	Port type (TYPEC_PORT_DFP, TYPEC_PORT_UFP, or
> - *		TYPEC_PORT_DRP)
> - * @default_role:
> - *		Default port role (TYPEC_SINK or TYPEC_SOURCE).
> - *		Set to TYPEC_NO_PREFERRED_ROLE if no default role.
> - * @try_role_hw:True if try.{Src,Snk} is implemented in hardware
> - * @alt_modes:	List of supported alternate modes
> - */
> -struct tcpc_config {
> -	const u32 *src_pdo;
> -	unsigned int nr_src_pdo;
> -
> -	const u32 *snk_pdo;
> -	unsigned int nr_snk_pdo;
> -
> -	const u32 *snk_vdo;
> -	unsigned int nr_snk_vdo;
> -
> -	unsigned int operating_snk_mw;
> -
> -	enum typec_port_type type;
> -	enum typec_port_data data;
> -	enum typec_role default_role;
> -	bool try_role_hw;	/* try.{src,snk} implemented in hardware */
> -	bool self_powered;	/* port belongs to a self powered device */
> -
> -	const struct typec_altmode_desc *alt_modes;
> -};
> -
>  /* Mux state attributes */
>  #define TCPC_MUX_USB_ENABLED		BIT(0)	/* USB enabled */
>  #define TCPC_MUX_DP_ENABLED		BIT(1)	/* DP enabled */
> @@ -92,7 +53,6 @@ struct tcpc_config {
>  
>  /**
>   * struct tcpc_dev - Port configuration and callback functions
> - * @config:	Pointer to port configuration
>   * @fwnode:	Pointer to port fwnode
>   * @get_vbus:	Called to read current VBUS state
>   * @get_current_limit:
> @@ -121,7 +81,6 @@ struct tcpc_config {
>   * @mux:	Pointer to multiplexer data
>   */
>  struct tcpc_dev {
> -	const struct tcpc_config *config;
>  	struct fwnode_handle *fwnode;
>  
>  	int (*init)(struct tcpc_dev *dev);
> -- 
> 2.23.0
> 



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