This patchset fixes the HPD handling for TypeC legacy ports. It depends on an indirect detection method described in patch 2 and 3, which will be replaced by a direct method once the BIOS/HW/FW team delivers a promised SW/HW flag for this purpose.
There is no issue with the indirect method I know of, except for the DP legacy case (as opposed to the HDMI case), where doing a modeset/DP AUX read before the first HPD connect event will still result in mayham. But that is already the situation now and we have a plan in place (the direct method mentioned above), so the change is an improvement even for the DP case. This will leave the Thunderbolt and USB DP alternate mode HPD handling still disfunctional, but that's another story, we have some plan to fix that too (in cooperation with the HW/FW team). Cc: Paulo Zanoni <paulo.r.zan...@intel.com> Cc: Ville Syrjälä <ville.syrj...@linux.intel.com> Cc: José Roberto de Souza <jose.so...@intel.com> Cc: Rodrigo Vivi <rodrigo.v...@intel.com> Imre Deak (3): drm/i915/icl: Add a debug print for TypeC port disconnection drm/i915/icl: Add fix for TypeC legacy HDMI HPD handling drm/i915/icl: Add fix for TypeC legacy DP HPD handling drivers/gpu/drm/i915/intel_ddi.c | 54 +++++++++++++++++++++++++++++-- drivers/gpu/drm/i915/intel_dp.c | 69 +++++++++++++++++++++++++++++----------- drivers/gpu/drm/i915/intel_drv.h | 5 ++- 3 files changed, 105 insertions(+), 23 deletions(-) -- 2.13.2 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
