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

From: Anshuman Gupta <anshuman.gupta@intel.com>
To: Jani Nikula <jani.nikula@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org, seanpaul@chromium.org,
	Tomas Winkler <tomas.winkler@intel.com>,
	dri-devel@lists.freedesktop.org
Subject: Re: [Intel-gfx] [PATCH 09/13] drm/i915/hdcp: mst streams support in hdcp port_data
Date: Tue, 20 Oct 2020 14:00:59 +0530	[thread overview]
Message-ID: <20201020083059.GW25390@intel.com> (raw)
In-Reply-To: <878sc19u3a.fsf@intel.com>

On 2020-10-20 at 11:31:37 +0300, Jani Nikula wrote:
> On Mon, 19 Oct 2020, Anshuman Gupta <anshuman.gupta@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@intel.com>
> > Signed-off-by: Anshuman Gupta <anshuman.gupta@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.
Thanks Jani for comment, as this need to sens DRI too, so I formatted a
separate patch to avoid other related HDCP noise. 
https://patchwork.freedesktop.org/series/82806/
Based upon ack of maintainers i will rebase my this series.
Thanks,
Anshuman Gupta.
> 
> Cc: Tomas.
> 
> 
> BR,
> Jani.
> 
> 
> -- 
> Jani Nikula, Intel Open Source Graphics Center
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