topic/mst-bw-check-fixes-for-airlied-2020-03-12-2:
UAPI Changes: None
Cross-subsystem Changes: None
Core Changes: Fixed regressions introduced by commit cd82d82cbc04
("drm/dp_mst: Add branch bandwidth validation to MST atomic check"),
which would cause us to:
* Calculate the available bandwidth on an MST topology incorrectly, and
as a result reject most display configurations that would try to enable
more then one sink on a topology
* Occasionally expose MST connectors to userspace before finishing
probing their PBN capabilities, resulting in us rejecting display
configurations because we assumed briefly that no bandwidth was
available
Driver Changes: None
The following changes since commit e3c3b6e66da1caeb39a504b03ddcdd3693e45254:
Merge tag 'exynos-drm-fixes-for-v5.6-rc5-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-fixes (2020-03-12 11:02:52 +1000)
are available in the Git repository at:
git://anongit.freedesktop.org/drm/drm-misc tags/topic/mst-bw-check-fixes-for-airlied-2020-03-12-2
for you to fetch changes up to 047d4cd2067b028e7bca906c5ce20f4c89b65386:
drm/dp_mst: Rewrite and fix bandwidth limit checks (2020-03-12 19:07:49 -0400)
----------------------------------------------------------------
UAPI Changes: None
Cross-subsystem Changes: None
Core Changes: Fixed regressions introduced by commit cd82d82cbc04
("drm/dp_mst: Add branch bandwidth validation to MST atomic check"),
which would cause us to:
* Calculate the available bandwidth on an MST topology incorrectly, and
as a result reject most display configurations that would try to enable
more then one sink on a topology
* Occasionally expose MST connectors to userspace before finishing
probing their PBN capabilities, resulting in us rejecting display
configurations because we assumed briefly that no bandwidth was
available
Driver Changes: None
----------------------------------------------------------------
Lyude Paul (4):
drm/dp_mst: Rename drm_dp_mst_is_dp_mst_end_device() to be less redundant
drm/dp_mst: Use full_pbn instead of available_pbn for bandwidth checks
drm/dp_mst: Reprobe path resources in CSN handler
drm/dp_mst: Rewrite and fix bandwidth limit checks
drivers/gpu/drm/drm_dp_mst_topology.c | 184 +++++++++++++++++++++++-----------
include/drm/drm_dp_mst_helper.h | 4 +-
2 files changed, 128 insertions(+), 60 deletions(-)
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