[Intel-gfx] [PATCH v6 00/10] drm/i915: DP branch devices

[Mika Kahola]

Prep work for DP branch device handling

This series of patches reads DPCD register 0x80h for receiver
capabilities for DP branch devices. The branch device types are
converters for the following standards

 - DP to VGA
 - DP to DVI
 - DP to HDMI
 - DP++ dual mode
 - Wireless WiGig
 
DPCD register defines max pixel rate for VGA dongles. This
check is carried out during mode validation. 

What's new in the series:
 - Readout of branch device ID, HW, and SW revisions from DPCD register 
 - branch device info on debugfs

v2: DPCD register read outs moved to drm (Ville, Daniel)
v3: Max pixel rate computation moved to drm (Daniel)
v4: Use of drm_dp_helper routines to collect data (Ville)
v5: Remove duplicate code and unnecessary functions from drm_dp_helper (Ville)
v6: Rebase and i915_debugfs cleanup

Mika Kahola (10):
  drm: Add missing DP downstream port types
  drm: Drop VGA from bpc definitions
  drm: Helper to read max clock rate
  drm: Helper to read max bits per component
  drm: Read DP branch device id
  drm: Read DP branch device HW revision
  drm: Read DP branch device SW revision
  drm/i915: Check pixel rate for DP to VGA dongle
  drm/i915: Update bits per component for display info
  drm/i915: Add DP branch device info on debugfs

 drivers/gpu/drm/drm_dp_helper.c     | 129 ++++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/i915_debugfs.c |  75 +++++++++++++++++++++
 drivers/gpu/drm/i915/intel_dp.c     |  35 ++++++++++
 include/drm/drm_dp_helper.h         |  27 ++++++--
 4 files changed, 261 insertions(+), 5 deletions(-)

-- 
1.9.1