[Intel-gfx] [PATCH 09/13] drm/i915/hdcp: mst streams support in hdcp port_data

[Jani Nikula]

On Mon, 19 Oct 2020, Anshuman Gupta <anshuman.gupta at intel.com> wrote:
> Add support for multiple mst stream in hdcp port data
> which will be used by RepeaterAuthStreamManage msg and
> HDCP 2.2 security f/w for m' validation.
>
> v2:
> Init the hdcp port data k for HDMI/DP SST strem.
>
> Cc: Ramalingam C <ramalingam.c at intel.com>
> Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>
> ---
>  .../drm/i915/display/intel_display_types.h    |  4 +-
>  drivers/gpu/drm/i915/display/intel_hdcp.c     | 92 ++++++++++++++++---
>  drivers/misc/mei/hdcp/mei_hdcp.c              |  3 +-
>  include/drm/drm_hdcp.h                        |  8 +-

...

> diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
> index 9ae9669e46ea..b10d266fb60a 100644
> --- a/drivers/misc/mei/hdcp/mei_hdcp.c
> +++ b/drivers/misc/mei/hdcp/mei_hdcp.c
> @@ -569,8 +569,7 @@ static int mei_hdcp_verify_mprime(struct device *dev,
>  	verify_mprime_in->header.api_version = HDCP_API_VERSION;
>  	verify_mprime_in->header.command_id = WIRED_REPEATER_AUTH_STREAM_REQ;
>  	verify_mprime_in->header.status = ME_HDCP_STATUS_SUCCESS;
> -	verify_mprime_in->header.buffer_len =
> -			WIRED_CMD_BUF_LEN_REPEATER_AUTH_STREAM_REQ_MIN_IN;
> +	verify_mprime_in->header.buffer_len = cmd_size  - sizeof(struct hdcp_cmd_header);
>  
>  	verify_mprime_in->port.integrated_port_type = data->port_type;
>  	verify_mprime_in->port.physical_port = (u8)data->fw_ddi;
> diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h
> index fe58dbb46962..c8a37bb406b2 100644
> --- a/include/drm/drm_hdcp.h
> +++ b/include/drm/drm_hdcp.h
> @@ -101,11 +101,11 @@
>  
>  /* Following Macros take a byte at a time for bit(s) masking */
>  /*
> - * TODO: This has to be changed for DP MST, as multiple stream on
> - * same port is possible.
> - * For HDCP2.2 on HDMI and DP SST this value is always 1.
> + * TODO: This is based upon actual H/W  MST streams capacity.
> + *
> + * This is should be moved out to platform specific header.
>   */
> -#define HDCP_2_2_MAX_CONTENT_STREAMS_CNT	1
> +#define HDCP_2_2_MAX_CONTENT_STREAMS_CNT	4
>  #define HDCP_2_2_TXCAP_MASK_LEN			2
>  #define HDCP_2_2_RXCAPS_LEN			3
>  #define HDCP_2_2_RX_REPEATER(x)			((x) & BIT(0))

These two hunk should probably be separate changes... would be easier to
record the changes (as they're not mentioned in the commit message at
all!) and the acks from other maintainers.

Cc: Tomas.


BR,
Jani.


-- 
Jani Nikula, Intel Open Source Graphics Center