This is the large series for adding MST suspend/resume reprobing that
I've been working on for quite a while now. In addition, I:
- Refactored and cleaned up any code I ended up digging through in the
process of understanding how some parts of these helpers worked.
- Added some debugging tools along the way that I ended up needing to
figure out some issues in my own code
Note that there's still one important part of this process missing
that's not included in this patch series: EDID reprobing, which I
believe Stanislav Lisovskiy from Intel is currently working on. The main
purpose of this series is to fix the issue of the in-memory topology
state (e.g. connectors connected to an MST hub, branch devices, etc.)
going out of sync if a topology connected to a connector is swapped out
with a different topology while the system is resumed, or while the
device housing said connector is in runtime suspend.
As well, the debugging tools that are added in this include:
- A limited debugging utility for dumping the list of topology
references on an MST port or branch connector whose topology reference
count has reached 0
- Sideband down request dumping, along with some basic selftests for
testing our encoding/decoding functions
Patchseries wide changes since v1
- Add "Combine redundant cases in drm_dp_encode_sideband_req()" to
fulfill some of the danvet's review requests
Lyude Paul (27):
drm/dp_mst: Move link address dumping into a function
drm/dp_mst: Get rid of list clear in destroy_connector_work
drm/dp_mst: Destroy MSTBs asynchronously
drm/dp_mst: Move test_calc_pbn_mode() into an actual selftest
drm/print: Add drm_err_printer()
drm/dp_mst: Combine redundant cases in drm_dp_encode_sideband_req()
drm/dp_mst: Add sideband down request tracing + selftests
drm/dp_mst: Remove PDT teardown in drm_dp_destroy_port() and refactor
drm/dp_mst: Refactor drm_dp_send_enum_path_resources
drm/dp_mst: Remove huge conditional in drm_dp_mst_handle_up_req()
drm/dp_mst: Constify guid in drm_dp_get_mst_branch_by_guid()
drm/dp_mst: Refactor drm_dp_mst_handle_up_req()
drm/dp_mst: Refactor drm_dp_mst_handle_down_rep()
drm/dp_mst: Destroy topology_mgr mutexes
drm/dp_mst: Cleanup drm_dp_send_link_address() a bit
drm/dp_mst: Refactor pdt setup/teardown, add more locking
drm/dp_mst: Rename drm_dp_add_port and drm_dp_update_port
drm/dp_mst: Remove lies in {up,down}_rep_recv documentation
drm/dp_mst: Handle UP requests asynchronously
drm/dp_mst: Protect drm_dp_mst_port members with connection_mutex
drm/dp_mst: Don't forget to update port->input in
drm_dp_mst_handle_conn_stat()
drm/nouveau: Don't grab runtime PM refs for HPD IRQs
drm/amdgpu: Iterate through DRM connectors correctly
drm/amdgpu/dm: Resume short HPD IRQs before resuming MST topology
drm/dp_mst: Add basic topology reprobing when resuming
drm/dp_mst: Also print unhashed pointers for malloc/topology
references
drm/dp_mst: Add topology ref history tracking for debugging
drivers/gpu/drm/Kconfig | 14 +
.../gpu/drm/amd/amdgpu/amdgpu_connectors.c | 13 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 20 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 5 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_encoders.c | 40 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c | 5 +-
drivers/gpu/drm/amd/amdgpu/dce_v10_0.c | 34 +-
drivers/gpu/drm/amd/amdgpu/dce_v11_0.c | 34 +-
drivers/gpu/drm/amd/amdgpu/dce_v6_0.c | 40 +-
drivers/gpu/drm/amd/amdgpu/dce_v8_0.c | 34 +-
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 41 +-
.../drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c | 10 +-
drivers/gpu/drm/drm_dp_mst_topology.c | 1633 +++++++++++++----
.../gpu/drm/drm_dp_mst_topology_internal.h | 24 +
drivers/gpu/drm/drm_print.c | 6 +
drivers/gpu/drm/i915/display/intel_dp.c | 3 +-
drivers/gpu/drm/nouveau/dispnv50/disp.c | 6 +-
drivers/gpu/drm/nouveau/nouveau_connector.c | 33 +-
drivers/gpu/drm/selftests/Makefile | 2 +-
.../gpu/drm/selftests/drm_modeset_selftests.h | 2 +
.../drm/selftests/test-drm_dp_mst_helper.c | 238 +++
.../drm/selftests/test-drm_modeset_common.h | 2 +
include/drm/drm_dp_mst_helper.h | 143 +-
include/drm/drm_print.h | 17 +
24 files changed, 1873 insertions(+), 526 deletions(-)
create mode 100644 drivers/gpu/drm/drm_dp_mst_topology_internal.h
create mode 100644 drivers/gpu/drm/selftests/test-drm_dp_mst_helper.c
--
2.21.0
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