X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=drivers%2Fgpu%2Fdrm%2Fdrm_dp_mst_topology.c;h=e23df5fd3836b1b70169a1ee125782c1e754b875;hb=c44506997c67bcc6299e47dd43030cbd133ed439;hp=eb603f1defc2250ea158864ea4371e24655138e1;hpb=352712274507645b6f82b8763977ad87321919a3;p=firefly-linux-kernel-4.4.55.git

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index eb603f1defc2..e23df5fd3836 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -2632,6 +2632,16 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
 			seq_printf(m, "%02x ", buf[i]);
 		seq_printf(m, "\n");
 
+		/* dump the standard OUI branch header */
+		ret = drm_dp_dpcd_read(mgr->aux, DP_BRANCH_OUI, buf, DP_BRANCH_OUI_HEADER_SIZE);
+		seq_printf(m, "branch oui: ");
+		for (i = 0; i < 0x3; i++)
+			seq_printf(m, "%02x", buf[i]);
+		seq_printf(m, " devid: ");
+		for (i = 0x3; i < 0x8; i++)
+			seq_printf(m, "%c", buf[i]);
+		seq_printf(m, " revision: hw: %x.%x sw: %x.%x", buf[0x9] >> 4, buf[0x9] & 0xf, buf[0xa], buf[0xb]);
+		seq_printf(m, "\n");
 		bret = dump_dp_payload_table(mgr, buf);
 		if (bret == true) {
 			seq_printf(m, "payload table: ");