mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-04 18:09:57 +00:00
thunderbolt: Log DisplayPort adapter rate and lanes on discovery
This may be helpful when debugging possible issues around DisplayPort port tunneling. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
parent
f1138fda1b
commit
033c2d8ab2
1 changed files with 43 additions and 0 deletions
|
@ -1137,6 +1137,47 @@ static int tb_dp_init_video_path(struct tb_path *path)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static void tb_dp_dump(struct tb_tunnel *tunnel)
|
||||
{
|
||||
struct tb_port *in, *out;
|
||||
u32 dp_cap, rate, lanes;
|
||||
|
||||
in = tunnel->src_port;
|
||||
out = tunnel->dst_port;
|
||||
|
||||
if (tb_port_read(in, &dp_cap, TB_CFG_PORT,
|
||||
in->cap_adap + DP_LOCAL_CAP, 1))
|
||||
return;
|
||||
|
||||
rate = tb_dp_cap_get_rate(dp_cap);
|
||||
lanes = tb_dp_cap_get_lanes(dp_cap);
|
||||
|
||||
tb_port_dbg(in, "maximum supported bandwidth %u Mb/s x%u = %u Mb/s\n",
|
||||
rate, lanes, tb_dp_bandwidth(rate, lanes));
|
||||
|
||||
out = tunnel->dst_port;
|
||||
|
||||
if (tb_port_read(out, &dp_cap, TB_CFG_PORT,
|
||||
out->cap_adap + DP_LOCAL_CAP, 1))
|
||||
return;
|
||||
|
||||
rate = tb_dp_cap_get_rate(dp_cap);
|
||||
lanes = tb_dp_cap_get_lanes(dp_cap);
|
||||
|
||||
tb_port_dbg(out, "maximum supported bandwidth %u Mb/s x%u = %u Mb/s\n",
|
||||
rate, lanes, tb_dp_bandwidth(rate, lanes));
|
||||
|
||||
if (tb_port_read(in, &dp_cap, TB_CFG_PORT,
|
||||
in->cap_adap + DP_REMOTE_CAP, 1))
|
||||
return;
|
||||
|
||||
rate = tb_dp_cap_get_rate(dp_cap);
|
||||
lanes = tb_dp_cap_get_lanes(dp_cap);
|
||||
|
||||
tb_port_dbg(in, "reduced bandwidth %u Mb/s x%u = %u Mb/s\n",
|
||||
rate, lanes, tb_dp_bandwidth(rate, lanes));
|
||||
}
|
||||
|
||||
/**
|
||||
* tb_tunnel_discover_dp() - Discover existing Display Port tunnels
|
||||
* @tb: Pointer to the domain structure
|
||||
|
@ -1214,6 +1255,8 @@ struct tb_tunnel *tb_tunnel_discover_dp(struct tb *tb, struct tb_port *in,
|
|||
goto err_deactivate;
|
||||
}
|
||||
|
||||
tb_dp_dump(tunnel);
|
||||
|
||||
tb_tunnel_dbg(tunnel, "discovered\n");
|
||||
return tunnel;
|
||||
|
||||
|
|
Loading…
Reference in a new issue