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thunderbolt: Create multiple DisplayPort tunnels if there are more DP IN/OUT pairs

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[ Upstream commit 8648c6465c025c488e2855c209c0dea1a1a15184 ]

Currently we only create one DisplayPort tunnel even if there would be
more DP IN/OUT pairs available. Specifically this happens when a router
is unplugged and we check if a new DisplayPort tunnel can be created. To
cover this create tunnels as long as we find suitable DP IN/OUT pairs.

Signed-off-by: Gil Fine <gil.fine@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Qin Wan <qin.wan@hp.com>
Signed-off-by: Alexandru Gagniuc <alexandru.gagniuc@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gil Fine
2024-10-01 17:30:59 +00:00
committed by Greg Kroah-Hartman
parent 6870e5b499
commit ae2d54f5e5
1 changed files with 17 additions and 9 deletions
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26
drivers/thunderbolt/tb.c
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@@ -1282,18 +1282,13 @@ static struct tb_port *tb_find_dp_out(struct tb *tb, struct tb_port *in)
return NULL;
}
static void tb_tunnel_dp(struct tb *tb)
static bool tb_tunnel_one_dp(struct tb *tb)
{
int available_up, available_down, ret, link_nr;
struct tb_cm *tcm = tb_priv(tb);
struct tb_port *port, *in, *out;
struct tb_tunnel *tunnel;
if (!tb_acpi_may_tunnel_dp()) {
tb_dbg(tb, "DP tunneling disabled, not creating tunnel\n");
return;
}
/*
* Find pair of inactive DP IN and DP OUT adapters and then
* establish a DP tunnel between them.
@@ -1321,11 +1316,11 @@ static void tb_tunnel_dp(struct tb *tb)
if (!in) {
tb_dbg(tb, "no suitable DP IN adapter available, not tunneling\n");
return;
return false;
}
if (!out) {
tb_dbg(tb, "no suitable DP OUT adapter available, not tunneling\n");
return;
return false;
}
/*
@@ -1398,7 +1393,7 @@ static void tb_tunnel_dp(struct tb *tb)
* TMU mode to HiFi for CL0s to work.
*/
tb_increase_tmu_accuracy(tunnel);
return;
return true;
err_free:
tb_tunnel_free(tunnel);
@@ -1413,6 +1408,19 @@ err_rpm_put:
pm_runtime_put_autosuspend(&out->sw->dev);
pm_runtime_mark_last_busy(&in->sw->dev);
pm_runtime_put_autosuspend(&in->sw->dev);
return false;
}
static void tb_tunnel_dp(struct tb *tb)
{
if (!tb_acpi_may_tunnel_dp()) {
tb_dbg(tb, "DP tunneling disabled, not creating tunnel\n");
return;
}
while (tb_tunnel_one_dp(tb))
;
}
static void tb_enter_redrive(struct tb_port *port)