From: Mykola Lysenko <mykola.lyse...@amd.com>
This is needed to receive correct port
number from RAD, so MSTB could be found
Acked-by: Dave Airlie <airlied at gmail.com>
Signed-off-by: Mykola Lysenko <Mykola.Lysenko at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Cc: stable at vger.kernel.org
---
drivers/gpu/drm/drm_dp_mst_topology.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c
b/drivers/gpu/drm/drm_dp_mst_topology.c
index d809ce8..6ed90a2 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -1044,7 +1044,7 @@ static void build_mst_prop_path(const struct
drm_dp_mst_branch *mstb,
snprintf(proppath, proppath_size, "mst:%d", mstb->mgr->conn_base_id);
for (i = 0; i < (mstb->lct - 1); i++) {
int shift = (i % 2) ? 0 : 4;
- int port_num = mstb->rad[i / 2] >> shift;
+ int port_num = (mstb->rad[i / 2] >> shift) & 0xf;
snprintf(temp, sizeof(temp), "-%d", port_num);
strlcat(proppath, temp, proppath_size);
}
@@ -1195,7 +1195,7 @@ static struct drm_dp_mst_branch
*drm_dp_get_mst_branch_device(struct drm_dp_mst_
for (i = 0; i < lct - 1; i++) {
int shift = (i % 2) ? 0 : 4;
- int port_num = rad[i / 2] >> shift;
+ int port_num = (rad[i / 2] >> shift) & 0xf;
list_for_each_entry(port, &mstb->ports, next) {
if (port->port_num == port_num) {
--
2.5.0
