[Intel-gfx] [PATCH v2 0/7] YCBCR 4:2:0 support for LSPCON

[Shashank Sharma]

LSPCON is a DP->HDMI active dongle, enumerated as DP dual
mode adapter on Intel GEN9 platforms. It's provided by two
different vendors
        - Mega Chips America (MCA)
        - Parade Technologies (Parade)

In order to support YCBCR 4:2:0 outputs, these are the essential
steps:
        - Convert HDMI output format from RGB to YCBCR 4:4:4.
        - Set appropriate color space in AVI infoframes.
        - Write AVI infoframes to vendor specific AUX registers.

This patch series adds 7 patches, to accommodate above steps and
enable YCBCR 4:2:0 output for LSPCON based HDMI displays. First
4 patches are from Ville Syrjälä's patch series, which makes
infoframe functions available for DDI displays, published here:
https://patchwork.freedesktop.org/series/8183/

Rest 3 patches add:
- Vendor identification for LSPCON chips.
- AVI infoframe infrastructure for LSPCON displays.
- 4:2:0 support for LSPCON displays.

Shashank Sharma (3):
  drm/i915: check LSPCON vendor OUI
  drm/i915: write AVI infoframes for LSPCON
  drm/i915: YCBCR 420 support for LSPCON

Ville Syrjälä (4):
  drm/i915: Check has_infoframes when enabling infoframes
  drm/i915: Disable infoframes when shutting down DDI HDMI
  drm/i915: Move infoframe vfuncs into intel_digital_port
  drm/i915: Init infoframe vfuncs for DP encoders as well

 drivers/gpu/drm/i915/intel_ddi.c     |  37 ++--
 drivers/gpu/drm/i915/intel_display.c |  15 +-
 drivers/gpu/drm/i915/intel_dp.c      |  16 +-
 drivers/gpu/drm/i915/intel_drv.h     |  54 ++++--
 drivers/gpu/drm/i915/intel_hdmi.c    |  97 ++++++-----
 drivers/gpu/drm/i915/intel_lspcon.c  | 317 +++++++++++++++++++++++++++++++++--
 6 files changed, 457 insertions(+), 79 deletions(-)

-- 
2.7.4