This is v2 of [1], with the following changes: - Several functional/typo/formatting fixes, detailed in the patches. - Move the BW allocation from encoder hooks to intel_atomic_commit_tail() fixing the allocation for MST streams enabled/disabled w/o a full modeset (i.e. w/o re-enabling the master stream). - Fix an MST mode restore issue during system resume, which also lead to a tunnel BW allocation failure. (Patch 3) - Ensure a DPCD DPRX cap read as required by the TBT CM any time a long HPD pulse is detected. (Patch 20) - Explicitly disable the BW allocation mode during system suspend. The patchset is also available at: https://github.com/ideak/linux/commits/dp_tun_bw_alloc Cc: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Cc: Uma Shankar <uma.shankar@xxxxxxxxx> Cc: Jouni Högander <jouni.hogander@xxxxxxxxx> Cc: Saranya Gopal <saranya.gopal@xxxxxxxxx> Cc: Rajaram Regupathy <rajaram.regupathy@xxxxxxxxx> Cc: Gil Fine <gil.fine@xxxxxxxxx> Cc: Naama Shachar <naamax.shachar@xxxxxxxxx> Cc: Pengfei Xu <pengfei.xu@xxxxxxxxx> [1] https://lore.kernel.org/all/20240123102850.390126-1-imre.deak@xxxxxxxxx Imre Deak (21): drm/dp: Add drm_dp_max_dprx_data_rate() drm/dp: Add support for DP tunneling drm/i915: Fix display bpp limit computation during system resume drm/i915/dp: Add support to notify MST connectors to retry modesets drm/i915/dp: Use drm_dp_max_dprx_data_rate() drm/i915/dp: Factor out intel_dp_config_required_rate() drm/i915/dp: Export intel_dp_max_common_rate/lane_count() drm/i915/dp: Factor out intel_dp_update_sink_caps() drm/i915/dp: Factor out intel_dp_read_dprx_caps() drm/i915/dp: Add intel_dp_max_link_data_rate() drm/i915/dp: Add way to get active pipes with syncing commits drm/i915/dp: Add support for DP tunnel BW allocation drm/i915/dp: Add DP tunnel atomic state and check BW limit drm/i915/dp: Account for tunnel BW limit in intel_dp_max_link_data_rate() drm/i915/dp: Compute DP tunnel BW during encoder state computation drm/i915/dp: Allocate/free DP tunnel BW in the encoder enable/disable hooks drm/i915/dp: Handle DP tunnel IRQs drm/i915/dp: Call intel_dp_sync_state() always for DDI DP encoders drm/i915/dp: Suspend/resume DP tunnels drm/i915/dp: Read DPRX for all long HPD pulses drm/i915/dp: Enable DP tunnel BW allocation mode drivers/gpu/drm/display/Kconfig | 21 + drivers/gpu/drm/display/Makefile | 2 + drivers/gpu/drm/display/drm_dp_helper.c | 30 + drivers/gpu/drm/display/drm_dp_tunnel.c | 1929 +++++++++++++++++ drivers/gpu/drm/i915/Kconfig | 14 + drivers/gpu/drm/i915/Kconfig.debug | 1 + drivers/gpu/drm/i915/Makefile | 3 + drivers/gpu/drm/i915/display/intel_atomic.c | 10 + drivers/gpu/drm/i915/display/intel_crtc.c | 52 + drivers/gpu/drm/i915/display/intel_crtc.h | 2 + drivers/gpu/drm/i915/display/intel_ddi.c | 3 +- drivers/gpu/drm/i915/display/intel_display.c | 26 +- .../gpu/drm/i915/display/intel_display_core.h | 1 + .../drm/i915/display/intel_display_driver.c | 20 +- .../drm/i915/display/intel_display_types.h | 9 + drivers/gpu/drm/i915/display/intel_dp.c | 292 ++- drivers/gpu/drm/i915/display/intel_dp.h | 13 +- .../drm/i915/display/intel_dp_link_training.c | 33 +- .../drm/i915/display/intel_dp_link_training.h | 1 + drivers/gpu/drm/i915/display/intel_dp_mst.c | 18 +- .../gpu/drm/i915/display/intel_dp_tunnel.c | 815 +++++++ .../gpu/drm/i915/display/intel_dp_tunnel.h | 133 ++ drivers/gpu/drm/i915/display/intel_link_bw.c | 27 +- drivers/gpu/drm/i915/display/intel_link_bw.h | 2 +- drivers/gpu/drm/i915/display/intel_tc.c | 7 + include/drm/display/drm_dp.h | 61 + include/drm/display/drm_dp_helper.h | 2 + include/drm/display/drm_dp_tunnel.h | 248 +++ 28 files changed, 3650 insertions(+), 125 deletions(-) create mode 100644 drivers/gpu/drm/display/drm_dp_tunnel.c create mode 100644 drivers/gpu/drm/i915/display/intel_dp_tunnel.c create mode 100644 drivers/gpu/drm/i915/display/intel_dp_tunnel.h create mode 100644 include/drm/display/drm_dp_tunnel.h -- 2.39.2
