From: Dave Airlie Date: Tue, 14 Jul 2015 01:33:31 +0000 (+1000) Subject: drm/dp/mst: dump branch OUI in debugfs (v2) X-Git-Tag: omap-for-v4.3/fixes-rc1~89^2~19 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=44790462d041d3037d60b3bf88f30837a72006ff;p=pandora-kernel.git drm/dp/mst: dump branch OUI in debugfs (v2) It appears some MST docks are worse than other, but the only way to know is to see the sw revisions in here, so dump the branch OUI so we can look at the sw revision. v2: Thierry made me feel guilty, so I parsed the branch OUI. Reviewed-by: Thierry Reding Signed-off-by: Dave Airlie --- diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index b0487c9f018c..86bc9ade5fc4 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -2631,6 +2631,16 @@ 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: "); Reading git-diff-tree failed