Re: [PATCH v2] usb: typec: altmodes/displayport: verify compatible source/sink role combination

[Prashant Malani]

Hi RD,

On Oct 18 20:34, RD Babiera wrote:
> DisplayPort Alt Mode CTS test 10.3.8 states that both sides of the
> connection shall be compatible with one another such that the connection
> is not Source to Source or Sink to Sink.
> 
> The DisplayPort driver currently checks for a compatible pin configuration
> that resolves into a source and sink combination. The CTS test is designed
> to send a Discover Modes message that has a compatible pin configuration
> but advertises the same port capability as the device; the current check
> fails this.
> 
> Verify that the port and port partner resolve into a valid source and sink
> combination before checking for a compatible pin configuration.
> 
> ---
> Changes since v1:
> * Fixed styling errors
> * Added DP_CAP_IS_UFP_D and DP_CAP_IS_DFP_D as macros to typec_dp.h
> ---
> 

FWIW,
Reviewed-by: Prashant Malani <pmalani@xxxxxxxxxxxx>

> Fixes: 0e3bb7d6894d ("usb: typec: Add driver for DisplayPort alternate mode")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: RD Babiera <rdbabiera@xxxxxxxxxx>

BR,

-Prashant