Re: [PATCH v6 00/16] drm/i915: Add support for HDCP 1.4 over MST connectors

[Ramalingam C <ramalingam.c@intel.com>]

On 2020-05-18 at 10:32:09 -0400, Sean Paul wrote:
> On Fri, May 15, 2020 at 10:48 AM Ramalingam C <ramalingam.c@intel.com> wrote:
> >
> > On 2020-04-29 at 15:54:46 -0400, Sean Paul wrote:
> > > From: Sean Paul <seanpaul@chromium.org>
> > >
> > > Changes in v6:
> > > -Rebased on -tip
> > > -Disabled HDCP over MST on GEN12
> > > -Addressed Lyude's review comments in the QUERY_STREAM_ENCRYPTION_STATUS patch
> >
> > Sean,
> >
> > What is the test setup you have used?
> >
> 
> Hi Ram,
> Thanks for the feedback. To be completely honest it's really
> frustrating that I'm just now getting questions and review feedback
> (which I've been begging for on IRC) on this review that could have
> been addressed ~5 months ago. It's super disruptive to have to keep
> switching back to this after a long hiatus and many i915 refactors
> complicating my rebases.
Hi Sean,

As a developer I really feel bad for the delay happened in review.
I couldn't spend required time for understanding MST part hence I
couldn't review.

Just for this series now I have started preparing myself on these topics,
hence started reviewing the series.

If you are still interested to work on this, I can commit for regular reviews.

Thanks,
Ram.
> 
> If no one wants this patchset, that's fine, please just let me know so
> I don't waste any more time. If Intel is interested, could we please
> stop the review trickle and lay out exactly what needs to be done to
> get this landed?
> 
> Sean
> 
> 
> > I am afraid our CI dont have the coverage for MST capability yet to provide
> > the functional status of the code.
> >
> > -Ram.
> > >
> > > Sean Paul (16):
> > >   drm/i915: Fix sha_text population code
> > >   drm/i915: Clear the repeater bit on HDCP disable
> > >   drm/i915: WARN if HDCP signalling is enabled upon disable
> > >   drm/i915: Intercept Aksv writes in the aux hooks
> > >   drm/i915: Use the cpu_transcoder in intel_hdcp to toggle HDCP
> > >     signalling
> > >   drm/i915: Factor out hdcp->value assignments
> > >   drm/i915: Protect workers against disappearing connectors
> > >   drm/i915: Don't fully disable HDCP on a port if multiple pipes are
> > >     using it
> > >   drm/i915: Support DP MST in enc_to_dig_port() function
> > >   drm/i915: Use ddi_update_pipe in intel_dp_mst
> > >   drm/i915: Factor out HDCP shim functions from dp for use by dp_mst
> > >   drm/i915: Plumb port through hdcp init
> > >   drm/i915: Add connector to hdcp_shim->check_link()
> > >   drm/mst: Add support for QUERY_STREAM_ENCRYPTION_STATUS MST sideband
> > >     message
> > >   drm/i915: Print HDCP version info for all connectors
> > >   drm/i915: Add HDCP 1.4 support for MST connectors
> > >
> > >  drivers/gpu/drm/drm_dp_mst_topology.c         | 142 ++++
> > >  drivers/gpu/drm/i915/Makefile                 |   1 +
> > >  drivers/gpu/drm/i915/display/intel_ddi.c      |  29 +-
> > >  drivers/gpu/drm/i915/display/intel_ddi.h      |   2 +
> > >  .../drm/i915/display/intel_display_debugfs.c  |  21 +-
> > >  .../drm/i915/display/intel_display_types.h    |  30 +-
> > >  drivers/gpu/drm/i915/display/intel_dp.c       | 654 +--------------
> > >  drivers/gpu/drm/i915/display/intel_dp.h       |   9 +
> > >  drivers/gpu/drm/i915/display/intel_dp_hdcp.c  | 743 ++++++++++++++++++
> > >  drivers/gpu/drm/i915/display/intel_dp_mst.c   |  19 +
> > >  drivers/gpu/drm/i915/display/intel_hdcp.c     | 217 +++--
> > >  drivers/gpu/drm/i915/display/intel_hdcp.h     |   2 +-
> > >  drivers/gpu/drm/i915/display/intel_hdmi.c     |  25 +-
> > >  .../drm/selftests/test-drm_dp_mst_helper.c    |  17 +
> > >  include/drm/drm_dp_helper.h                   |   3 +
> > >  include/drm/drm_dp_mst_helper.h               |  44 ++
> > >  include/drm/drm_hdcp.h                        |   3 +
> > >  17 files changed, 1235 insertions(+), 726 deletions(-)
> > >  create mode 100644 drivers/gpu/drm/i915/display/intel_dp_hdcp.c
> > >
> > > --
> > > Sean Paul, Software Engineer, Google / Chromium OS
> > >
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