[00/12] HDCP Type1 MST fixes

Message

Kandpal, Suraj Feb. 14, 2024, 8:47 a.m. UTC

We were seeing a blank screen whenever Type1 content was played.
This was due to extra timing which was taken as we had moved to
remote read and writes previously for MST scenario, which in turn
was done as we were not able to do direct read and writes to the
immediate downstream device.
The correct flow should be that we talk only to the immediate
downstream device and the rest needs to be taken care by that device.
With this patch series we move back to direct reads and writes,
fix the fastset setting because of which direct reads and writes to
HDCP related DPCD register stopped working, derive hdcp structure
correctly and increase robustability if rxcaps HDCP capability
reporting.

Signed-off-by: Suraj Kandpal <[e-mail]>

Suraj Kandpal (12):
  drm/i915/hdcp: Move to direct reads for HDCP
  drm/i915/hdcp: Move source hdcp2 checks into its own function
  drm/i915/hdcp: Refactor intel_dp_hdcp2_capable
  drm/i915/hdcp: Pass drm_dp_aux to read_bcaps function
  drm/i915/hdcp: Rename hdcp capable functions
  drm/i915/hdcp: Add new remote capability check shim function
  drm/i915/hdcp: HDCP Capability for the downstream device
  drm/i915/hdcp: Remove additional timing for reading mst hdcp message
  drm/i915/hdcp: Extract hdcp structure from correct connector
  drm/i915/hdcp: Don't enable HDCP directly from check_link
  drm/i915/hdcp: Allocate stream id after HDCP AKE stage
  drm/i915/hdcp: Read Rxcaps for robustibility

 .../drm/i915/display/intel_display_debugfs.c  |  25 ++-
 .../drm/i915/display/intel_display_types.h    |  12 +-
 drivers/gpu/drm/i915/display/intel_dp_hdcp.c  | 137 +++++++-----
 drivers/gpu/drm/i915/display/intel_hdcp.c     | 208 +++++++++---------
 drivers/gpu/drm/i915/display/intel_hdcp.h     |   7 +-
 drivers/gpu/drm/i915/display/intel_hdmi.c     |   6 +-
 6 files changed, 227 insertions(+), 168 deletions(-)