pmdomain: rockchip: reduce indentation in rockchip_pd_power

Rework the logic, so that the function exits early when the
power domain state is already correct to reduce code indentation.

No functional change intended.

Reviewed-by: Heiko Stuebner <[email protected]>
Tested-by: Heiko Stuebner <[email protected]>
Tested-by: Adrian Larumbe <[email protected]> # On Rock 5B
Signed-off-by: Sebastian Reichel <[email protected]>
Link: https://lore.kernel.org/r/20250220-rk3588-gpu-pwr-domain-regulator-v6-4-a4f9c24e5b81@kernel.org
Signed-off-by: Ulf Hansson <[email protected]>

Author: sre

drivers/pmdomain/rockchip/pm-domains.c

@@ -592,39 +592,40 @@ static int rockchip_pd_power(struct rockchip_pm_domain *pd, bool power_on)
 
 	guard(mutex)(&pmu->mutex);
 
-	if (rockchip_pmu_domain_is_on(pd) != power_on) {
-		ret = clk_bulk_enable(pd->num_clks, pd->clks);
-		if (ret < 0) {
-			dev_err(pmu->dev, "failed to enable clocks\n");
-			return ret;
-		}
+	if (rockchip_pmu_domain_is_on(pd) == power_on)
+		return 0;
 
-		rockchip_pmu_ungate_clk(pd, true);
+	ret = clk_bulk_enable(pd->num_clks, pd->clks);
+	if (ret < 0) {
+		dev_err(pmu->dev, "failed to enable clocks\n");
+		return ret;
+	}
 
-		if (!power_on) {
-			rockchip_pmu_save_qos(pd);
+	rockchip_pmu_ungate_clk(pd, true);
 
-			/* if powering down, idle request to NIU first */
-			rockchip_pmu_set_idle_request(pd, true);
-		}
+	if (!power_on) {
+		rockchip_pmu_save_qos(pd);
 
-		ret = rockchip_do_pmu_set_power_domain(pd, power_on);
-		if (ret < 0) {
-			clk_bulk_disable(pd->num_clks, pd->clks);
-			return ret;
-		}
+		/* if powering down, idle request to NIU first */
+		rockchip_pmu_set_idle_request(pd, true);
+	}
 
-		if (power_on) {
-			/* if powering up, leave idle mode */
-			rockchip_pmu_set_idle_request(pd, false);
+	ret = rockchip_do_pmu_set_power_domain(pd, power_on);
+	if (ret < 0) {
+		clk_bulk_disable(pd->num_clks, pd->clks);
+		return ret;
+	}
 
-			rockchip_pmu_restore_qos(pd);
-		}
+	if (power_on) {
+		/* if powering up, leave idle mode */
+		rockchip_pmu_set_idle_request(pd, false);
 
-		rockchip_pmu_ungate_clk(pd, false);
-		clk_bulk_disable(pd->num_clks, pd->clks);
+		rockchip_pmu_restore_qos(pd);
 	}
 
+	rockchip_pmu_ungate_clk(pd, false);
+	clk_bulk_disable(pd->num_clks, pd->clks);
+
 	return 0;
 }