[Intel-gfx] [RFC] drm/hdcp: Max MST content streams

[Jani Nikula]

On Mon, 19 Oct 2020, Anshuman Gupta <anshuman.gupta at intel.com> wrote:
> Let's define Maximum MST content streams up to four
> generically which can be supported by modern display
> controllers.
>
> Cc: Sean Paul <seanpaul at chromium.org>
> Cc: Ramalingam C <ramalingam.c at intel.com>
> Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>

Hey drm-misc maintainers,

I'd like to get an ack to merge this via drm-intel as part of [1].

Thanks,
Jani.



[1] http://lore.kernel.org/r/20201014045252.13608-1-anshuman.gupta@intel.com



> ---
>  include/drm/drm_hdcp.h | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h
> index fe58dbb46962..ac22c246542a 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: HDCP_2_2_MAX_CONTENT_STREAMS_CNT is based upon actual
> + * H/W MST streams capacity.
> + * This required to 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))

-- 
Jani Nikula, Intel Open Source Graphics Center