[Intel-gfx] [PATCH v2 0/4] Enable Transcoder Port Sync feature for Tiled displays

Manasi Navare manasi.d.navare at intel.com
Tue Apr 23 15:48:57 UTC 2019

In case of tiled displays, each tile is sent across a separate CRTC and a
separate port/connector connected to the monitor. In this case we need to make
sure that the timings across these transcoders/ports are synchronized else
the two tile displays can be off.

Transcoder Port Sync is a transcoder level feature. This mode forces
two or more transcoders to be in sync with one transcoder master
and one or more transcoder slaves. In the case of DP/eDP, the master
is unaware that it is operating in Port Sync mode, only the slave is aware
that it is operating in this mode. Hence in this configuration, we need
to do a mdoeset on slaves first and configure the port sync in slave

Manasi Navare (4):
  drm/i915/icl: Assign Master slave crtc links for Transcoder Port Sync
  drm/i915/icl: Enable TRANSCODER PORT SYNC for tiled displays across
    separate ports
  drm/i915/dp: Trigger modeset if master_crtc or slaves bitmask changes
  drm/i915/dp: Enable master-slaves in trans port sync mode in correct

 drivers/gpu/drm/i915/intel_ddi.c     |   3 +-
 drivers/gpu/drm/i915/intel_display.c | 274 +++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_drv.h     |   6 +
 3 files changed, 282 insertions(+), 1 deletion(-)


More information about the Intel-gfx mailing list