thunderbolt: Drop useless 'unidirectional' parameter from tb_switch_tmu_is_enabled()

There is no point passing it as we already have a field for that. While
there clean up the kernel-doc of things that do not really belong to the
API documentation (these can be figured out from the spec itself).

No functional changes.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>

drivers/thunderbolt/tb.c

@@ -362,7 +362,7 @@ static int tb_enable_tmu(struct tb_switch *sw)
 	int ret;
 
 	/* If it is already enabled in correct mode, don't touch it */
-	if (tb_switch_tmu_is_enabled(sw, sw->tmu.unidirectional_request))
+	if (tb_switch_tmu_is_enabled(sw))
 		return 0;
 
 	ret = tb_switch_tmu_disable(sw);

drivers/thunderbolt/tb.h

@@ -995,16 +995,14 @@ void tb_switch_enable_tmu_1st_child(struct tb_switch *sw,
 /**
  * tb_switch_tmu_is_enabled() - Checks if the specified TMU mode is enabled
  * @sw: Router whose TMU mode to check
- * @unidirectional: If uni-directional (bi-directional otherwise)
  *
- * Return true if hardware TMU configuration matches the one passed in
- * as parameter. That is HiFi/Normal and either uni-directional or bi-directional.
+ * Return true if hardware TMU configuration matches the requested
+ * configuration.
  */
-static inline bool tb_switch_tmu_is_enabled(const struct tb_switch *sw,
-					    bool unidirectional)
+static inline bool tb_switch_tmu_is_enabled(const struct tb_switch *sw)
 {
 	return sw->tmu.rate == sw->tmu.rate_request &&
-	       sw->tmu.unidirectional == unidirectional;
+	       sw->tmu.unidirectional == sw->tmu.unidirectional_request;
 }
 
 static inline const char *tb_switch_clx_name(enum tb_clx clx)

drivers/thunderbolt/tmu.c

@@ -639,12 +639,9 @@ static int tb_switch_tmu_change_mode(struct tb_switch *sw)
  * tb_switch_tmu_enable() - Enable TMU on a router
  * @sw: Router whose TMU to enable
  *
- * Enables TMU of a router to be in uni-directional Normal/HiFi
- * or bi-directional HiFi mode. Calling tb_switch_tmu_configure() is required
- * before calling this function, to select the mode Normal/HiFi and
- * directionality (uni-directional/bi-directional).
- * In HiFi mode all tunneling should work. In Normal mode, DP tunneling can't
- * work. Uni-directional mode is required for CLx (Link Low-Power) to work.
+ * Enables TMU of a router to be in uni-directional Normal/HiFi or
+ * bi-directional HiFi mode. Calling tb_switch_tmu_configure() is
+ * required before calling this function.
  */
 int tb_switch_tmu_enable(struct tb_switch *sw)
 {
@@ -662,7 +659,7 @@ int tb_switch_tmu_enable(struct tb_switch *sw)
 	if (!tb_switch_is_clx_supported(sw))
 		return 0;
 
-	if (tb_switch_tmu_is_enabled(sw, sw->tmu.unidirectional_request))
+	if (tb_switch_tmu_is_enabled(sw))
 		return 0;
 
 	if (tb_switch_is_titan_ridge(sw) && unidirectional) {