This is v3 of [1] addressing the review comments, adding R-bs and the following changes based on further testing / offline discussions: - Return -ENOSPC to userspace in case of a link BW limit failure. (Patch 9, thanks to Karthik B S for the related IGT testing) - Replace fractional bpp fix with a patch from Ville. (Patch 12) - Disable DSC PPS SDP during output disabling. (Patch 20, Ville) [1] https://lore.kernel.org/intel-gfx/20230824080517.693621-1-imre.deak@xxxxxxxxx Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx> Cc: Stanislav Lisovskiy <stanislav.lisovskiy@xxxxxxxxx> Cc: Lyude Paul <lyude@xxxxxxxxxx> Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Cc: Luca Coelho <luciano.coelho@xxxxxxxxx> Imre Deak (24): drm/i915/dp: Factor out helpers to compute the link limits drm/i915/dp: Track the pipe and link bpp limits separately drm/i915/dp: Skip computing a non-DSC link config if DSC is needed drm/i915/dp: Update the link bpp limits for DSC mode drm/i915/dp: Limit the output link bpp in DSC mode drm/i915: Add helper to modeset a set of pipes drm/i915: During modeset forcing handle inactive but enabled pipes drm/i915: Factor out a helper to check/compute all the CRTC states drm/i915: Add helpers for BW management on shared display links drm/i915/fdi: Improve FDI BW sharing between pipe B and C drm/i915/fdi: Recompute state for affected CRTCs on FDI links drm/dp_mst: Add a way to calculate PBN values with FEC overhead drm/dp_mst: Add helper to determine if an MST port is downstream of another port drm/dp_mst: Factor out a helper to check the atomic state of a topology manager drm/dp_mst: Swap the order of checking root vs. non-root port BW limitations drm/i915/dp_mst: Fix PBN calculation with FEC overhead drm/i915/dp_mst: Add atomic state for all streams on pre-tgl platforms drm/i915/dp_mst: Program the DSC PPS SDP for each stream drm/i915/dp: Make sure the DSC PPS SDP is disabled whenever DSC is disabled drm/i915/dp_mst: Enable DSC decompression if any stream needs this drm/i915/dp_mst: Add missing DSC compression disabling drm/i915/dp_mst: Allow DSC only for sink ports of the first branch device drm/i915/dp_mst: Improve BW sharing between MST streams drm/i915/dp_mst: Check BW limitations only after all streams are computed Ville Syrjälä (1): drm/dp_mst: Fix fractional DSC bpp handling .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +- .../display/amdgpu_dm/amdgpu_dm_mst_types.c | 2 +- drivers/gpu/drm/display/drm_dp_mst_topology.c | 181 ++++++++--- drivers/gpu/drm/i915/Makefile | 1 + drivers/gpu/drm/i915/display/g4x_hdmi.c | 6 +- drivers/gpu/drm/i915/display/intel_cdclk.c | 2 +- drivers/gpu/drm/i915/display/intel_crt.c | 7 + drivers/gpu/drm/i915/display/intel_crtc.c | 1 + drivers/gpu/drm/i915/display/intel_ddi.c | 12 +- drivers/gpu/drm/i915/display/intel_display.c | 203 +++++++++---- drivers/gpu/drm/i915/display/intel_display.h | 6 +- .../drm/i915/display/intel_display_types.h | 26 +- drivers/gpu/drm/i915/display/intel_dp.c | 196 +++++++++--- drivers/gpu/drm/i915/display/intel_dp.h | 17 +- drivers/gpu/drm/i915/display/intel_dp_mst.c | 287 +++++++++++++++--- drivers/gpu/drm/i915/display/intel_dp_mst.h | 3 + drivers/gpu/drm/i915/display/intel_fdi.c | 140 +++++++-- drivers/gpu/drm/i915/display/intel_fdi.h | 5 + drivers/gpu/drm/i915/display/intel_link_bw.c | 244 +++++++++++++++ drivers/gpu/drm/i915/display/intel_link_bw.h | 39 +++ drivers/gpu/drm/i915/display/intel_lvds.c | 10 +- drivers/gpu/drm/i915/display/intel_sdvo.c | 10 +- drivers/gpu/drm/i915/display/skl_watermark.c | 2 +- drivers/gpu/drm/nouveau/dispnv50/disp.c | 3 +- .../gpu/drm/tests/drm_dp_mst_helper_test.c | 19 +- include/drm/display/drm_dp_mst_helper.h | 9 +- 26 files changed, 1203 insertions(+), 230 deletions(-) create mode 100644 drivers/gpu/drm/i915/display/intel_link_bw.c create mode 100644 drivers/gpu/drm/i915/display/intel_link_bw.h -- 2.37.2
