phy: phy-rockchip-samsung-hdptx: Enable runtime PM at PHY core level

When a new PHY is created via [devm_]phy_create(), the runtime PM for it
is not enabled unless the parent device (which creates the PHY) has its
own runtime PM already enabled.

Move the call to devm_pm_runtime_enable() before devm_phy_create() to
enable runtime PM at PHY core level.

With this change the ->power_on() and ->power_off() callbacks do not
require explicit runtime PM management anymore, since the PHY core
handles that via phy_pm_runtime_{get,put}_sync() when phy_power_on() and
phy_power_off() are invoked.

Hence drop the now unnecessary calls to pm_runtime_resume_and_get() and
pm_runtime_put() helpers.

Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Link: https://lore.kernel.org/r/20240620-rk3588-hdmiphy-clkprov-v2-2-6a2d2164e508@collabora.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c

@@ -860,7 +860,7 @@ static int rk_hdptx_ropll_tmds_mode_config(struct rk_hdptx_phy *hdptx,
 static int rk_hdptx_phy_power_on(struct phy *phy)
 {
 	struct rk_hdptx_phy *hdptx = phy_get_drvdata(phy);
-	int ret, bus_width = phy_get_bus_width(hdptx->phy);
+	int bus_width = phy_get_bus_width(hdptx->phy);
 	/*
 	 * FIXME: Temporary workaround to pass pixel_clk_rate
 	 * from the HDMI bridge driver until phy_configure_opts_hdmi
@@ -871,17 +871,7 @@ static int rk_hdptx_phy_power_on(struct phy *phy)
 	dev_dbg(hdptx->dev, "%s bus_width=%x rate=%u\n",
 		__func__, bus_width, rate);
 
-	ret = pm_runtime_resume_and_get(hdptx->dev);
-	if (ret) {
-		dev_err(hdptx->dev, "Failed to resume phy: %d\n", ret);
-		return ret;
-	}
-
-	ret = rk_hdptx_ropll_tmds_mode_config(hdptx, rate);
-	if (ret)
-		pm_runtime_put(hdptx->dev);
-
-	return ret;
+	return rk_hdptx_ropll_tmds_mode_config(hdptx, rate);
 }
 
 static int rk_hdptx_phy_power_off(struct phy *phy)
@@ -894,8 +884,6 @@ static int rk_hdptx_phy_power_off(struct phy *phy)
 	if (ret == 0 && (val & HDPTX_O_PLL_LOCK_DONE))
 		rk_hdptx_phy_disable(hdptx);
 
-	pm_runtime_put(hdptx->dev);
-
 	return ret;
 }
 
@@ -977,6 +965,10 @@ static int rk_hdptx_phy_probe(struct platform_device *pdev)
 		return dev_err_probe(dev, PTR_ERR(hdptx->grf),
 				     "Could not get GRF syscon\n");
 
+	ret = devm_pm_runtime_enable(dev);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to enable runtime PM\n");
+
 	hdptx->phy = devm_phy_create(dev, NULL, &rk_hdptx_phy_ops);
 	if (IS_ERR(hdptx->phy))
 		return dev_err_probe(dev, PTR_ERR(hdptx->phy),
@@ -986,10 +978,6 @@ static int rk_hdptx_phy_probe(struct platform_device *pdev)
 	phy_set_drvdata(hdptx->phy, hdptx);
 	phy_set_bus_width(hdptx->phy, 8);
 
-	ret = devm_pm_runtime_enable(dev);
-	if (ret)
-		return dev_err_probe(dev, ret, "Failed to enable runtime PM\n");
-
 	phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
 	if (IS_ERR(phy_provider))
 		return dev_err_probe(dev, PTR_ERR(phy_provider),