linux-kernel - Re: [PATCH v2 3/4] usb: typec-mux: ptn36502: broadcast typec state to next mux

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Date: Fri, 7 Jun 2024 08:51:59 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Neil Armstrong <neil.armstrong@...aro.org>
Cc: Heikki Krogerus <heikki.krogerus@...ux.intel.com>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Bjorn Andersson <andersson@...nel.org>, 
	Luca Weiss <luca.weiss@...rphone.com>, linux-arm-msm@...r.kernel.org, linux-usb@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/4] usb: typec-mux: ptn36502: broadcast typec state
 to next mux

On Thu, Jun 06, 2024 at 03:11:15PM +0200, Neil Armstrong wrote:
> In the Type-C graph, the ptn36502 retimer is in between the USB-C
> connector and the USB3/DP combo PHY, and this PHY also requires the
> USB-C mode events to properly set-up the SuperSpeed Lanes functions
> to setup USB3-only, USB3 + DP Altmode or DP Altmode only on the 4 lanes.
> 
> Update the ptn36502 retimer to get an optional type-c mux on the next
> endpoint, and broadcast the received mode to it.
> 
> Tested-by: Luca Weiss <luca.weiss@...rphone.com>
> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
> 
> ---
> 
> Reported Tested by Luca in [1]
> 
> [1] https://lore.kernel.org/all/D1HOCBW6RG72.1B2RKGKW2Q5VC@fairphone.com/
> ---
>  drivers/usb/typec/mux/ptn36502.c | 24 ++++++++++++++++++++++--
>  1 file changed, 22 insertions(+), 2 deletions(-)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>


-- 
With best wishes
Dmitry