linux-kernel - Re: [PATCH] usb: typec: ucsi: Skip setting orientation for UCSI version 2.0 and above

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Message-ID: <mjgwv3soxgdcybkoo6xglxfpusswmjoyit4z3qpbnyhatj73od@ywmnx6vyupsi>
Date: Tue, 28 Oct 2025 17:30:08 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Abel Vesa <abel.vesa@...aro.org>
Cc: Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Dmitry Baryshkov <lumag@...nel.org>, linux-arm-msm@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: typec: ucsi: Skip setting orientation for UCSI
 version 2.0 and above

On Tue, Oct 28, 2025 at 04:39:19PM +0200, Abel Vesa wrote:
> In case of UCSI version 2.0 and above, if the orientation is set from
> glink as well, it will trigger the consumers along the graph (PHYs,
> repeaters and so on) to reconfigure a second time. This might break
> the consumer drivers which aren't currently implemented to drop the
> second request of setting the same orientation.

Might or breaks? What happens if the driver doesn't ignore the request?

> 
> So lets leave the orientation setting to the UCSI generic implementation
> for all platform that implement UCSI spec 2.0 and above.
> 
> Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
> ---
>  drivers/usb/typec/ucsi/ucsi_glink.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 

-- 
With best wishes
Dmitry