linux-kernel - Re: [PATCH 2/8] usb: typec: ucsi: add recipient arg to update

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Message-ID: <aFpq0GutBucmKWLw@kuha.fi.intel.com>
Date: Tue, 24 Jun 2025 12:07:28 +0300
From: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konradybcio@...nel.org>, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 2/8] usb: typec: ucsi: add recipient arg to
 update_altmodes() callback

On Sat, Jun 21, 2025 at 09:12:57PM +0300, Dmitry Baryshkov wrote:
> The update_altmodes() is executed only for connetor's AltModes, because
> that's what required on the CCG platforms. Other platforms (like Lenovo
> Yoga C630) requires similar fix for partner's AltModes. Extend
> update_altmodes() callback to accept the recipient as an argument and
> move corresponding check to the CCG UCSI driver.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>

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

> ---
>  drivers/usb/typec/ucsi/ucsi.c     | 5 ++---
>  drivers/usb/typec/ucsi/ucsi.h     | 3 ++-
>  drivers/usb/typec/ucsi/ucsi_ccg.c | 4 ++++
>  3 files changed, 8 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
> index 01ce858a1a2b3466155db340e213c767d1e79479..e913d099f934c7728cb678fc8e21e75ab0a00cce 100644
> --- a/drivers/usb/typec/ucsi/ucsi.c
> +++ b/drivers/usb/typec/ucsi/ucsi.c
> @@ -531,13 +531,12 @@ ucsi_register_altmodes_nvidia(struct ucsi_connector *con, u8 recipient)
>  	 * Update the original altmode table as some ppms may report
>  	 * multiple DP altmodes.
>  	 */
> -	if (recipient == UCSI_RECIPIENT_CON)
> -		multi_dp = ucsi->ops->update_altmodes(ucsi, orig, updated);
> +	multi_dp = ucsi->ops->update_altmodes(ucsi, recipient, orig, updated);
>  
>  	/* now register altmodes */
>  	for (i = 0; i < max_altmodes; i++) {
>  		memset(&desc, 0, sizeof(desc));
> -		if (multi_dp && recipient == UCSI_RECIPIENT_CON) {
> +		if (multi_dp) {
>  			desc.svid = updated[i].svid;
>  			desc.vdo = updated[i].mid;
>  		} else {
> diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
> index 5a8f947fcece29f98c0458f9eb05c0c5ede2d244..d02f6a3e2f50a4044eb3f22276931017cc624532 100644
> --- a/drivers/usb/typec/ucsi/ucsi.h
> +++ b/drivers/usb/typec/ucsi/ucsi.h
> @@ -82,7 +82,8 @@ struct ucsi_operations {
>  	int (*sync_control)(struct ucsi *ucsi, u64 command, u32 *cci,
>  			    void *data, size_t size);
>  	int (*async_control)(struct ucsi *ucsi, u64 command);
> -	bool (*update_altmodes)(struct ucsi *ucsi, struct ucsi_altmode *orig,
> +	bool (*update_altmodes)(struct ucsi *ucsi, u8 recipient,
> +				struct ucsi_altmode *orig,
>  				struct ucsi_altmode *updated);
>  	void (*update_connector)(struct ucsi_connector *con);
>  	void (*connector_status)(struct ucsi_connector *con);
> diff --git a/drivers/usb/typec/ucsi/ucsi_ccg.c b/drivers/usb/typec/ucsi/ucsi_ccg.c
> index e9a9df1431af3a52c00cc456f5c920b9077a1ade..d83a0051c737336af2543fc2f6d53a131ffe9583 100644
> --- a/drivers/usb/typec/ucsi/ucsi_ccg.c
> +++ b/drivers/usb/typec/ucsi/ucsi_ccg.c
> @@ -394,6 +394,7 @@ static void ucsi_ccg_update_get_current_cam_cmd(struct ucsi_ccg *uc, u8 *data)
>  }
>  
>  static bool ucsi_ccg_update_altmodes(struct ucsi *ucsi,
> +				     u8 recipient,
>  				     struct ucsi_altmode *orig,
>  				     struct ucsi_altmode *updated)
>  {
> @@ -402,6 +403,9 @@ static bool ucsi_ccg_update_altmodes(struct ucsi *ucsi,
>  	int i, j, k = 0;
>  	bool found = false;
>  
> +	if (recipient != UCSI_RECIPIENT_CON)
> +		return false;
> +
>  	alt = uc->orig;
>  	new_alt = uc->updated;
>  	memset(uc->updated, 0, sizeof(uc->updated));
> 
> -- 
> 2.39.5

-- 
heikki