[PATCH v2 04/23] drm/amd/display: Support USB4 dynamic link encoder selection.

[Harry Wentland]

On 2021-10-05 03:51, Wayne Lin wrote:
> From: Jimmy Kizito <Jimmy.Kizito at amd.com>
> 
> [why & how]
> Add codes for commit "f42ef862fb1f drm/amd/display: Add dynamic
> link encoder selection" to support USB4 DP tunneling feature.
> 

Title should be:
"Set DPIA link endpoint type"

Description:
"We will need a way to distinguish physically connected
links and DPIA endpoints."

Harry

> Reviewed-by: Jun Lei <Jun.Lei at amd.com>
> Acked-by: Wayne Lin <Wayne.Lin at amd.com>
> Acked-by: Nicholas Kazlauskas <nicholas.kazlauskas at amd.com>
> Signed-off-by: Jimmy Kizito <Jimmy.Kizito at amd.com>
> ---
>  drivers/gpu/drm/amd/display/dc/core/dc_link.c | 2 ++
>  drivers/gpu/drm/amd/display/dc/dc_types.h     | 1 +
>  2 files changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
> index 20b4819b73e4..66182b8c217b 100644
> --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
> +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
> @@ -1732,6 +1732,8 @@ static bool dc_link_construct_dpia(struct dc_link *link,
>  		  init_params->connector_index,
>  		  link->connector_signal);
>  
> +	link->ep_type = DISPLAY_ENDPOINT_USB4_DPIA;
> +
>  	/* TODO: Initialize link : funcs->link_init */
>  
>  	ddc_service_init_data.ctx = link->ctx;
> diff --git a/drivers/gpu/drm/amd/display/dc/dc_types.h b/drivers/gpu/drm/amd/display/dc/dc_types.h
> index 3c109c805447..15c353c389d8 100644
> --- a/drivers/gpu/drm/amd/display/dc/dc_types.h
> +++ b/drivers/gpu/drm/amd/display/dc/dc_types.h
> @@ -955,6 +955,7 @@ enum dc_psr_version {
>  /* Possible values of display_endpoint_id.endpoint */
>  enum display_endpoint_type {
>  	DISPLAY_ENDPOINT_PHY = 0, /* Physical connector. */
> +	DISPLAY_ENDPOINT_USB4_DPIA, /* USB4 DisplayPort tunnel. */
>  	DISPLAY_ENDPOINT_UNKNOWN = -1
>  };
>  
>