With Display Compression, the bit error in the pixel stream can turn into a significant corruption on the screen. The DP1.4 adds FEC - Forward Error Correction scheme which uses Reed-Solomon parity/correction check generated by the source and used by the sink to detect and correct small numbers of bit errors in the compressed stream. v2: Avoid doing aux channel read eberytime we check for FEC support. Instead cache the value of the DPCD registers, similar to the DSC implementaion (Jani) v3: Add fec as a state to crtc. Move around the code. (Ville) v4: s/can_fec/fec_enable; s/intel_dp_can_fec/intel_de_supports_fec; Add intel_dp_source supports_fec() (Ville) This is rebased on top of Manasi's End-to-end DSC Implementation: https://patchwork.freedesktop.org/series/47514/ Anusha Srivatsa (7): i915/dp/fec: Cache the FEC_CAPABLE DPCD register drm/dp/fec: DRM helper for Forward Error Correction i915/dp/fec: Check for FEC Support i915/dp/fec: Add can_fec to the crtc state. drm/i915/fec: Set FEC_READY in FEC_CONFIGURATION i915/dp/fec: Configure the Forward Error Correction bits. drm/i915/fec: Disable FEC state. drivers/gpu/drm/i915/i915_reg.h | 2 ++ drivers/gpu/drm/i915/intel_ddi.c | 60 ++++++++++++++++++++++++++++++++ drivers/gpu/drm/i915/intel_dp.c | 58 ++++++++++++++++++++++++++++-- drivers/gpu/drm/i915/intel_drv.h | 11 ++++++ include/drm/drm_dp_helper.h | 7 ++++ 5 files changed, 136 insertions(+), 2 deletions(-) -- 2.17.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
