[Intel-gfx] [PATCH v4 0/8] Adding driver-private objects to atomic state

[Dhinakaran Pandiyan]

Link bandwidth is a shared resource between multiple displays in DP MST
configurations. For atomic modesetting drivers, checking if there is
sufficient link bandwidth for a mode needs to be done during the
atomic_check phase to avoid failed modesets when multiple CRTC's and
connectors are involved.

Managing shared resources like DP MST link bandwidth in the driver's
subclassed atomic_state will result in duplicating the code in each atomic
modesetting driver. But adding objects like DP MST link bandwidth to the
DRM core's drm_atomic_state would mean that an object that is not a core
modesetting object like connector, CRTC or a plane will be modified by the
helper functions for swapping and clearing state. So, this series
introduces void * type driver-private objects in drm_atomic_state and adds
helper functions that operate on these private objects. Drivers can then
implement object-specific functions to swap and clear states.
The advantage of having void * for these objects in drm_atomic_state is
that objects of different types can be managed in the same state array.

This rebased version includes a few minor changes -
1) Used for_each_oldnew_connector_in_state() macro (7/8)
2) Added a WARN_ON() to check for connection_mutex (5/8)
3) Alignment fix. (4/8)

Pandiyan, Dhinakaran (8):
  drm/dp: Kill total_pbn and total_slots in struct
    drm_dp_mst_topology_mgr
  drm/dp: Kill unused MST vcpi slot availability tracking
  drm/dp: Split drm_dp_mst_allocate_vcpi
  drm: Add driver-private objects to atomic state
  drm/dp: Introduce MST topology state to track available link bandwidth
  drm/dp: Add DP MST helpers to atomically find and release vcpi slots
  drm: Connector helper function to release resources
  drm/dp: Track MST link bandwidth

 drivers/gpu/drm/drm_atomic.c             |  68 ++++++++++++
 drivers/gpu/drm/drm_atomic_helper.c      |  24 ++++
 drivers/gpu/drm/drm_dp_mst_topology.c    | 185 ++++++++++++++++++++++++++++---
 drivers/gpu/drm/i915/intel_dp_mst.c      |  42 +++++--
 drivers/gpu/drm/nouveau/nv50_display.c   |   3 +-
 drivers/gpu/drm/radeon/radeon_dp_mst.c   |   4 +-
 include/drm/drm_atomic.h                 |  93 ++++++++++++++++
 include/drm/drm_dp_mst_helper.h          |  33 ++++--
 include/drm/drm_modeset_helper_vtables.h |  13 +++
 9 files changed, 427 insertions(+), 38 deletions(-)

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2.7.4