From: Mikita Lipski <mikita.lipski@xxxxxxx>
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@xxxxxxx>
Signed-off-by: Lyude Paul <lyude@xxxxxxxxxx>
Fixes: cd82d82cbc04 ("drm/dp_mst: Add branch bandwidth validation to MST atomic check")
Cc: <stable@xxxxxxxxxxxxxxx> # v5.6+
Link: https://patchwork.freedesktop.org/patch/msgid/20200407160717.27976-1-mikita.lipski@xxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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;
