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drm/dp_mst: Set CLEAR_PAYLOAD_ID_TABLE as broadcast

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commit d919d3d6cd upstream.

[Why & How]
According to DP spec, CLEAR_PAYLOAD_ID_TABLE is a path broadcast request
message and current implementation is incorrect. Fix it.

Signed-off-by: Wayne Lin <Wayne.Lin@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210224101521.6713-3-Wayne.Lin@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wayne Lin 2021-02-24 18:15:21 +08:00 • committed by Greg Kroah-Hartman
commit 92b98bcc4f
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/drm_dp_mst_topology.c
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@ -1154,6 +1154,7 @@ static void build_clear_payload_id_table(struct drm_dp_sideband_msg_tx *msg)
req.req_type = DP_CLEAR_PAYLOAD_ID_TABLE;
drm_dp_encode_sideband_req(&req, msg);
msg->path_msg = true;
}
static int build_enum_path_resources(struct drm_dp_sideband_msg_tx *msg,
@ -2824,7 +2825,8 @@ static int set_hdr_from_dst_qlock(struct drm_dp_sideband_msg_hdr *hdr,
req_type = txmsg->msg[0] & 0x7f;
if (req_type == DP_CONNECTION_STATUS_NOTIFY ||
req_type == DP_RESOURCE_STATUS_NOTIFY)
req_type == DP_RESOURCE_STATUS_NOTIFY ||
req_type == DP_CLEAR_PAYLOAD_ID_TABLE)
hdr->broadcast = 1;
else
hdr->broadcast = 0;