PM: domains: Allow genpd providers to manage OPP tables directly by i…

…ts FW In some cases the OPP tables aren't specified in device tree, but rather encoded in the FW. To allow a genpd provider to specify them dynamically instead, let's add a new genpd flag, GENPD_FLAG_OPP_TABLE_FW. Signed-off-by: Ulf Hansson <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Sudeep Holla <[email protected]>
wafgo · Sep 21, 2023 · 3dd9151 · 3dd9151
1 parent 92b2028
commit 3dd9151
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Showing 2 changed files with 11 additions and 5 deletions.
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
@@ -130,6 +130,7 @@ static const struct genpd_lock_ops genpd_spin_ops = {
 #define genpd_is_active_wakeup(genpd)	(genpd->flags & GENPD_FLAG_ACTIVE_WAKEUP)
 #define genpd_is_cpu_domain(genpd)	(genpd->flags & GENPD_FLAG_CPU_DOMAIN)
 #define genpd_is_rpm_always_on(genpd)	(genpd->flags & GENPD_FLAG_RPM_ALWAYS_ON)
+#define genpd_is_opp_table_fw(genpd)	(genpd->flags & GENPD_FLAG_OPP_TABLE_FW)
 
 static inline bool irq_safe_dev_in_sleep_domain(struct device *dev,
 		const struct generic_pm_domain *genpd)
@@ -2328,7 +2329,7 @@ int of_genpd_add_provider_simple(struct device_node *np,
 	genpd->dev.of_node = np;
 
 	/* Parse genpd OPP table */
-	if (genpd->set_performance_state) {
+	if (!genpd_is_opp_table_fw(genpd) && genpd->set_performance_state) {
 		ret = dev_pm_opp_of_add_table(&genpd->dev);
 		if (ret)
 			return dev_err_probe(&genpd->dev, ret, "Failed to add OPP table\n");
@@ -2343,7 +2344,7 @@ int of_genpd_add_provider_simple(struct device_node *np,
 
 	ret = genpd_add_provider(np, genpd_xlate_simple, genpd);
 	if (ret) {
-		if (genpd->set_performance_state) {
+		if (!genpd_is_opp_table_fw(genpd) && genpd->set_performance_state) {
 			dev_pm_opp_put_opp_table(genpd->opp_table);
 			dev_pm_opp_of_remove_table(&genpd->dev);
 		}
@@ -2387,7 +2388,7 @@ int of_genpd_add_provider_onecell(struct device_node *np,
 		genpd->dev.of_node = np;
 
 		/* Parse genpd OPP table */
-		if (genpd->set_performance_state) {
+		if (!genpd_is_opp_table_fw(genpd) && genpd->set_performance_state) {
 			ret = dev_pm_opp_of_add_table_indexed(&genpd->dev, i);
 			if (ret) {
 				dev_err_probe(&genpd->dev, ret,
@@ -2423,7 +2424,7 @@ int of_genpd_add_provider_onecell(struct device_node *np,
 		genpd->provider = NULL;
 		genpd->has_provider = false;
 
-		if (genpd->set_performance_state) {
+		if (!genpd_is_opp_table_fw(genpd) && genpd->set_performance_state) {
 			dev_pm_opp_put_opp_table(genpd->opp_table);
 			dev_pm_opp_of_remove_table(&genpd->dev);
 		}
@@ -2455,7 +2456,7 @@ void of_genpd_del_provider(struct device_node *np)
 				if (gpd->provider == &np->fwnode) {
 					gpd->has_provider = false;
 
-					if (!gpd->set_performance_state)
+					if (genpd_is_opp_table_fw(gpd) || !gpd->set_performance_state)
 						continue;
 
 					dev_pm_opp_put_opp_table(gpd->opp_table);

diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
@@ -61,6 +61,10 @@
  * GENPD_FLAG_MIN_RESIDENCY:	Enable the genpd governor to consider its
  *				components' next wakeup when determining the
  *				optimal idle state.
+ *
+ * GENPD_FLAG_OPP_TABLE_FW:	The genpd provider supports performance states,
+ *				but its corresponding OPP tables are not
+ *				described in DT, but are given directly by FW.
  */
 #define GENPD_FLAG_PM_CLK	 (1U << 0)
 #define GENPD_FLAG_IRQ_SAFE	 (1U << 1)
@@ -69,6 +73,7 @@
 #define GENPD_FLAG_CPU_DOMAIN	 (1U << 4)
 #define GENPD_FLAG_RPM_ALWAYS_ON (1U << 5)
 #define GENPD_FLAG_MIN_RESIDENCY (1U << 6)
+#define GENPD_FLAG_OPP_TABLE_FW	 (1U << 7)
 
 enum gpd_status {
 	GENPD_STATE_ON = 0,	/* PM domain is on */