提交 fa487b2a 编写于 作者: G Gil Fine 提交者: Mika Westerberg

thunderbolt: Add module parameter for CLx disabling

Add a module parameter that allows user to completely disable CLx
functionality in case problems are found.
Signed-off-by: NGil Fine <gil.fine@intel.com>
Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com>
上级 43f977bc
......@@ -13,6 +13,7 @@
#include <linux/sched/signal.h>
#include <linux/sizes.h>
#include <linux/slab.h>
#include <linux/module.h>
#include "tb.h"
......@@ -26,6 +27,10 @@ struct nvm_auth_status {
u32 status;
};
static bool clx_enabled = true;
module_param_named(clx, clx_enabled, bool, 0444);
MODULE_PARM_DESC(clx, "allow low power states on the high-speed lanes (default: true)");
/*
* Hold NVM authentication failure status per switch This information
* needs to stay around even when the switch gets power cycled so we
......@@ -3478,6 +3483,9 @@ int tb_switch_enable_clx(struct tb_switch *sw, enum tb_clx clx)
{
struct tb_switch *root_sw = sw->tb->root_switch;
if (!clx_enabled)
return 0;
/*
* CLx is not enabled and validated on Intel USB4 platforms before
* Alder Lake.
......@@ -3539,6 +3547,9 @@ static int tb_switch_disable_cl0s(struct tb_switch *sw)
*/
int tb_switch_disable_clx(struct tb_switch *sw, enum tb_clx clx)
{
if (!clx_enabled)
return 0;
switch (clx) {
case TB_CL0S:
return tb_switch_disable_cl0s(sw);
......
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