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* [Intel-gfx] [PATCH 00/17] drm/i915: Improve BW management on shared display links
@ 2023-08-17 16:14 Imre Deak
  2023-08-17 16:14 ` [Intel-gfx] [PATCH 01/17] drm/i915/dp: Factor out helpers to compute the link limits Imre Deak
                   ` (20 more replies)
  0 siblings, 21 replies; 31+ messages in thread
From: Imre Deak @ 2023-08-17 16:14 UTC (permalink / raw)
  To: intel-gfx

This patchset improves the BW management of display output links shared
by multiple streams (pipes). At the moment each stream tries to reduce
its own BW in case of a limitation (by reducing the output pixel color
depth or enabling compression), however this may not reduce the BW
sufficiently resulting in the given modeset to fail.

Instead of the above this patchset will try to resolve the BW limitation
by reducing the BW of each stream on the same link in turn (reducing the
color depth and then turning on compression if possible as above), until
the total BW is within limits. Atm links where streams share the BW and
this change applies to are the PCH FDI bus and the DP MST link.

Imre Deak (17):
  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: Factor out a helper to check/compute all the CRTC states
  drm/i915/fdi: Improve FDI BW sharing between pipe B and C
  drm/dp_mst: Fix fractional bpp scaling in drm_dp_calc_pbn_mode()
  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: Improve BW sharing between MST streams
  drm/i915/dp_mst: Check BW limitations only when all streams are
    computed

 .../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 | 172 ++++++++++---
 drivers/gpu/drm/i915/display/g4x_hdmi.c       |   5 +-
 drivers/gpu/drm/i915/display/intel_atomic.c   | 215 +++++++++++++++++
 drivers/gpu/drm/i915/display/intel_atomic.h   |   8 +
 drivers/gpu/drm/i915/display/intel_crt.c      |   7 +
 drivers/gpu/drm/i915/display/intel_crtc.c     |   1 +
 drivers/gpu/drm/i915/display/intel_display.c  | 129 ++++++----
 drivers/gpu/drm/i915/display/intel_display.h  |   6 +
 .../drm/i915/display/intel_display_types.h    |  10 +-
 drivers/gpu/drm/i915/display/intel_dp.c       | 177 +++++++++++---
 drivers/gpu/drm/i915/display/intel_dp.h       |  17 +-
 drivers/gpu/drm/i915/display/intel_dp_mst.c   | 227 ++++++++++++++----
 drivers/gpu/drm/i915/display/intel_dp_mst.h   |   3 +
 drivers/gpu/drm/i915/display/intel_fdi.c      |  66 +++--
 drivers/gpu/drm/i915/display/intel_fdi.h      |   4 +
 drivers/gpu/drm/i915/display/intel_lvds.c     |   9 +-
 drivers/gpu/drm/i915/display/intel_sdvo.c     |   9 +-
 drivers/gpu/drm/nouveau/dispnv50/disp.c       |   2 +-
 .../gpu/drm/tests/drm_dp_mst_helper_test.c    |  31 ++-
 include/drm/display/drm_dp_mst_helper.h       |   9 +-
 22 files changed, 910 insertions(+), 201 deletions(-)

-- 
2.37.2


^ permalink raw reply	[flat|nested] 31+ messages in thread

end of thread, other threads:[~2023-08-19  2:20 UTC | newest]

Thread overview: 31+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2023-08-17 16:14 [Intel-gfx] [PATCH 00/17] drm/i915: Improve BW management on shared display links Imre Deak
2023-08-17 16:14 ` [Intel-gfx] [PATCH 01/17] drm/i915/dp: Factor out helpers to compute the link limits Imre Deak
2023-08-17 16:14 ` [Intel-gfx] [PATCH 02/17] drm/i915/dp: Track the pipe and link bpp limits separately Imre Deak
2023-08-17 16:27   ` Jani Nikula
2023-08-18  8:24     ` Kandpal, Suraj
2023-08-18 14:06       ` Imre Deak
2023-08-18 13:26     ` Imre Deak
2023-08-17 16:14 ` [Intel-gfx] [PATCH 03/17] drm/i915/dp: Skip computing a non-DSC link config if DSC is needed Imre Deak
2023-08-17 16:14 ` [Intel-gfx] [PATCH 04/17] drm/i915/dp: Update the link bpp limits for DSC mode Imre Deak
2023-08-17 16:14 ` [Intel-gfx] [PATCH 05/17] drm/i915/dp: Limit the output link bpp in " Imre Deak
2023-08-17 16:14 ` [Intel-gfx] [PATCH 06/17] drm/i915: Add helper to modeset a set of pipes Imre Deak
2023-08-17 16:14 ` [Intel-gfx] [PATCH 07/17] drm/i915: Factor out a helper to check/compute all the CRTC states Imre Deak
2023-08-17 16:14 ` [Intel-gfx] [PATCH 08/17] drm/i915/fdi: Improve FDI BW sharing between pipe B and C Imre Deak
2023-08-17 16:14 ` [Intel-gfx] [PATCH 09/17] drm/dp_mst: Fix fractional bpp scaling in drm_dp_calc_pbn_mode() Imre Deak
2023-08-17 16:14   ` Imre Deak
2023-08-17 16:14 ` [Intel-gfx] [PATCH 10/17] drm/dp_mst: Add a way to calculate PBN values with FEC overhead Imre Deak
2023-08-17 16:14   ` Imre Deak
2023-08-17 16:14 ` [Intel-gfx] [PATCH 11/17] drm/dp_mst: Add helper to determine if an MST port is downstream of another port Imre Deak
2023-08-17 16:14   ` Imre Deak
2023-08-17 16:14 ` [Intel-gfx] [PATCH 12/17] drm/dp_mst: Factor out a helper to check the atomic state of a topology manager Imre Deak
2023-08-17 16:14   ` Imre Deak
2023-08-17 16:14 ` [Intel-gfx] [PATCH 13/17] drm/dp_mst: Swap the order of checking root vs. non-root port BW limitations Imre Deak
2023-08-17 16:14   ` Imre Deak
2023-08-17 16:14 ` [Intel-gfx] [PATCH 14/17] drm/i915/dp_mst: Fix PBN calculation with FEC overhead Imre Deak
2023-08-17 16:14 ` [Intel-gfx] [PATCH 15/17] drm/i915/dp_mst: Add atomic state for all streams on pre-tgl platforms Imre Deak
2023-08-17 16:14 ` [Intel-gfx] [PATCH 16/17] drm/i915/dp_mst: Improve BW sharing between MST streams Imre Deak
2023-08-17 16:14 ` [Intel-gfx] [PATCH 17/17] drm/i915/dp_mst: Check BW limitations only when all streams are computed Imre Deak
2023-08-18  1:33 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for drm/i915: Improve BW management on shared display links Patchwork
2023-08-18  1:33 ` [Intel-gfx] ✗ Fi.CI.SPARSE: " Patchwork
2023-08-18  1:49 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2023-08-19  2:20 ` [Intel-gfx] ✗ Fi.CI.IGT: failure " Patchwork

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