[Intel-gfx] [PATCH v4 0/6] HDMI 2.0: Scrambling in DRM layer

[Shashank Sharma]

HDMI 2.0 spec defines a method to reduce the RF footprint while
operating at higher pixel clocks, which is called Scrambling.
Scrambling can be controlled over a new set of I2C registers
which are accessible over existing DDC I2C lines, called SCDC
register set.

This patch series contains 6 patches:
- First two patches add generic drm helper functions to read and
  write into SCDC registers. These patches are written by Thierry,
  in a patch series published here:
  https://patchwork.kernel.org/patch/9459051/
  Minor changes were done to map the patches into this series.
  
- Next two patches add functions for scrambling detection and
  scrambling control.

- Next two patches use this infrastructure in DRM layer from
  I915 driver, to enable scrambling on a GLK deivce which sports
  a native HDMI 2.0 controller.

V2:
- addressed review comments from Thierry, Ville and Dhinakaran
- added signed-off-by:self in first two patches(Jani N)

V3:
- addressed review comments from Jose and Jani

V4:
- addressed review comments from Maarten on patch 5,
  rebase all other patches

Shashank Sharma (4):
  drm/edid: detect SCDC support in HF-VSDB
  drm: scrambling support in drm layer
  drm/i915: enable scrambling
  drm/i915: allow HDMI 2.0 clock rates

Thierry Reding (2):
  drm: Add SCDC helpers
  drm/edid: check for HF-VSDB block

 Documentation/gpu/drm-kms-helpers.rst |  12 ++
 drivers/gpu/drm/Makefile              |   3 +-
 drivers/gpu/drm/drm_edid.c            |  60 ++++++++
 drivers/gpu/drm/drm_scdc_helper.c     | 275 ++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/i915_reg.h       |   4 +
 drivers/gpu/drm/i915/intel_ddi.c      |  28 ++++
 drivers/gpu/drm/i915/intel_drv.h      |  14 ++
 drivers/gpu/drm/i915/intel_hdmi.c     | 110 ++++++++++++++
 include/drm/drm_connector.h           |  52 +++++++
 include/drm/drm_edid.h                |   6 +-
 include/drm/drm_scdc_helper.h         | 173 +++++++++++++++++++++
 include/linux/hdmi.h                  |   1 +
 12 files changed, 736 insertions(+), 2 deletions(-)
 create mode 100644 drivers/gpu/drm/drm_scdc_helper.c
 create mode 100644 include/drm/drm_scdc_helper.h

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1.9.1