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drm/dp_mst: Zero assigned PBN when releasing VCPI slots 

Zero Port's PBN together with VCPI slots when releasing
allocated VCPI slots. That way when disabling the connector
it will not cause issues in drm_dp_mst_atomic_check verifying
branch bw limit.

Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Fixes: cd82d82cbc ("drm/dp_mst: Add branch bandwidth validation to MST atomic check")
Cc: <stable@vger.kernel.org> # v5.6+
Link: https://patchwork.freedesktop.org/patch/msgid/20200407160717.27976-1-mikita.lipski@amd.com
This commit is contained in:
Mikita Lipski 2020-04-07 12:07:17 -04:00 committed by Lyude Paul
parent 8623b5255a
commit 7bfc1fec1a
1 changed files with 1 additions and 0 deletions
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1
drivers/gpu/drm/drm_dp_mst_topology.c
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@ -4295,6 +4295,7 @@ int drm_dp_atomic_release_vcpi_slots(struct drm_atomic_state *state,
if (pos->vcpi) { if (pos->vcpi) {
drm_dp_mst_put_port_malloc(port); drm_dp_mst_put_port_malloc(port);
pos->vcpi = 0; pos->vcpi = 0;
pos->pbn = 0;
} }
return 0; return 0;