From: Ville Syrjälä ville.syrjala@linux.intel.com
Attempt to deal with DP downstream facing ports (DFP) more thoroughly. This involves reading more of the port caps and dealing with various clock/bpc limitations.
Also we try to hook up the DP dual mode dongles into the mix (unfortunately I've not yet seen a DP++ DFP that would pass the dual mode adapter register i2c accesses through).
And we try to enable YCbCr 444->420 conversion for HDMI DFPs which could allow some 4k displays to actually use 4k on pre-icl hardware (which doesn't have native 420 output), assuming we don't run into some other hardware limits.
It's a bit on the large side but since it looks like other people are poking around the same area I figured I'd post the entire thing.
Entire series available here: git://github.com/vsyrjala/linux.git dp_downstream_ports_5
Ville Syrjälä (26): drm/i915: Nuke pre-production GLK HDMI w/a 1139 drm/i915: Limit display Wa_1405510057 to gen11 drm/i915: Drop WaDDIIOTimeout:glk drm/i915: Add glk to intel_detect_preproduction_hw() drm/dp: Include the AUX CH name in the debug messages drm/i915/lspcon: Do not send infoframes to non-HDMI sinks drm/dp: Define protocol converter DPCD registers drm/dp: Define more downstream facing port caps drm/i915: Reworkd DFP max bpc handling drm/dp: Add helpers to identify downstream facing port types drm/dp: Pimp drm_dp_downstream_max_bpc() drm/dp: Redo drm_dp_downstream_max_clock() as drm_dp_downstream_max_dotclock() drm/i915: Reworkd DP DFP clock handling drm/i915: Dump downstream facing port caps drm/dp: Add drm_dp_downstream_{min,max}_tmds_clock() drm/i915: Deal with TMDS DFP clock limits drm/i915: Configure DP 1.3+ protocol converted HDMI mode drm/dp: Add drm_dp_downstream_mode() drm/i915: Handle downstream facing ports w/o EDID drm/i915: Extract intel_hdmi_has_audio() drm/i915: DP->HDMI TMDS clock limits vs. deep color drm/dp: Add helpers for DFP YCbCr 4:2:0 handling drm/i915: Do YCbCr 444->420 conversion via DP protocol converters drm/i915: Decouple DP++ from the HDMI code drm/i915: Try to probe DP++ dongles on DP++ downstream facing ports drm/i915: Try to frob the TMDS buffer enable knob on DP++ dongles on DP DFPs
drivers/gpu/drm/drm_dp_helper.c | 409 +++++++++++++++--- drivers/gpu/drm/drm_edid.c | 21 + drivers/gpu/drm/i915/display/intel_ddi.c | 23 +- .../drm/i915/display/intel_display_types.h | 22 +- drivers/gpu/drm/i915/display/intel_dp.c | 367 ++++++++++++++-- drivers/gpu/drm/i915/display/intel_dp.h | 1 + drivers/gpu/drm/i915/display/intel_hdmi.c | 181 ++++---- drivers/gpu/drm/i915/display/intel_hdmi.h | 11 +- drivers/gpu/drm/i915/i915_debugfs.c | 4 +- drivers/gpu/drm/i915/i915_drv.c | 1 + drivers/gpu/drm/i915/i915_drv.h | 2 + drivers/gpu/drm/i915/intel_pm.c | 10 - include/drm/drm_dp_helper.h | 63 ++- include/drm/drm_edid.h | 4 + 14 files changed, 904 insertions(+), 215 deletions(-)