From: Mikita Lipski mikita.lipski@amd.com
commit 7bfc1fec1af3e2f0194843855b0d49054fa42fd2 upstream.
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: cd82d82cbc04 ("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.... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/gpu/drm/drm_dp_mst_topology.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -4290,6 +4290,7 @@ int drm_dp_atomic_release_vcpi_slots(str if (pos->vcpi) { drm_dp_mst_put_port_malloc(port); pos->vcpi = 0; + pos->pbn = 0; }
return 0;