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drm/dp/mst: fix in RAD element access

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This is needed to receive correct port
number from RAD, so MSTB could be found

Acked-by: Dave Airlie <airlied@gmail.com>
Signed-off-by: Mykola Lysenko <Mykola.Lysenko@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Mykola Lysenko 2015-12-25 16:14:48 +08:00 • committed by Alex Deucher
parent 75af4c8c4c
commit 7a11a334aa
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/drm_dp_mst_topology.c
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@ -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); snprintf(proppath, proppath_size, "mst:%d", mstb->mgr->conn_base_id);
for (i = 0; i < (mstb->lct - 1); i++) { for (i = 0; i < (mstb->lct - 1); i++) {
int shift = (i % 2) ? 0 : 4; 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); snprintf(temp, sizeof(temp), "-%d", port_num);
strlcat(proppath, temp, proppath_size); 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++) { for (i = 0; i < lct - 1; i++) {
int shift = (i % 2) ? 0 : 4; 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) { list_for_each_entry(port, &mstb->ports, next) {
if (port->port_num == port_num) { if (port->port_num == port_num) {