On Tue, Jan 03, 2017 at 01:01:45PM -0800, Dhinakaran Pandiyan wrote: > Link bandwidth is shared between multiple display streams in DP MST > configurations. The DP MST topology manager structure maintains the shared > link bandwidth for a primary link directly connected to the GPU. 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. > > This series adds dp_mst_topology_state to track available link bw for > atomic modesets and MST helpers to find and release link bw in terms of > vcpi time slots. Using the new helpers is optional and the changes should > not affect drivers that don't support atomic modesetting. I have made > changes to i915 to use the new helpers, but this should be applicable to > nouveau as well. > > Patches 1-3/6 include cleanups and refactoring. > Patch 4/6 adds the MST topology state, 5/6 adds helpers to alter the state > and 6/6 contains i915 changes to use the helpers . Please also cc amdgpu and nouveau maintainers on these patches, they both will need it. -Daniel > > Dhinakaran Pandiyan (6): > drm/dp: Store drm_device in MST topology manager > drm/dp: Kill unused MST vcpi slot availability tracking > drm/dp: Split drm_dp_mst_allocate_vcpi > drm/dp: Introduce DP MST topology manager state to track DP link bw > drm/dp: Add DP MST helpers to atomically find and release vcpi slots > drm/i915/dp: Track available DP MST vcpi time slots > > drivers/gpu/drm/drm_atomic.c | 66 +++++++++++++++++++++++++ > drivers/gpu/drm/drm_atomic_helper.c | 10 ++++ > drivers/gpu/drm/drm_dp_mst_topology.c | 89 ++++++++++++++++++++++++++-------- > drivers/gpu/drm/i915/intel_display.c | 39 ++++++++++++++- > drivers/gpu/drm/i915/intel_dp_mst.c | 42 ++++++++++++++-- > drivers/gpu/drm/i915/intel_drv.h | 3 ++ > drivers/gpu/drm/nouveau/nv50_display.c | 5 +- > drivers/gpu/drm/radeon/radeon_dp_mst.c | 5 +- > include/drm/drm_atomic.h | 11 +++++ > include/drm/drm_dp_mst_helper.h | 35 ++++++++----- > 10 files changed, 263 insertions(+), 42 deletions(-) > > -- > 2.7.4 > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
