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Message-Id: <20240907-phy-qcom-edp-enable-runtime-pm-v1-1-8b9ee4210e1e@linaro.org>
Date: Sat, 07 Sep 2024 18:25:21 +0300
From: Abel Vesa <abel.vesa@...aro.org>
To: Vinod Koul <vkoul@...nel.org>,
Kishon Vijay Abraham I <kishon@...nel.org>
Cc: Johan Hovold <johan@...nel.org>,
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
linux-kernel@...r.kernel.org, Abel Vesa <abel.vesa@...aro.org>
Subject: [PATCH] phy: qcom: edp: Add runtime PM support
Enable runtime PM support by adding proper ops which will handle the
clocks and regulators. These resources will now be handled on power_on and
power_off instead of init and exit PHY ops. Also enable these resources on
probe in order to balance out the disabling that is happening right after.
Prevent runtime PM from being ON by default as well.
Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
---
drivers/phy/qualcomm/phy-qcom-edp.c | 105 ++++++++++++++++++++++++++----------
1 file changed, 77 insertions(+), 28 deletions(-)
diff --git a/drivers/phy/qualcomm/phy-qcom-edp.c b/drivers/phy/qualcomm/phy-qcom-edp.c
index da2b32fb5b45..3affeef261bf 100644
--- a/drivers/phy/qualcomm/phy-qcom-edp.c
+++ b/drivers/phy/qualcomm/phy-qcom-edp.c
@@ -192,14 +192,6 @@ static int qcom_edp_phy_init(struct phy *phy)
int ret;
u8 cfg8;
- ret = regulator_bulk_enable(ARRAY_SIZE(edp->supplies), edp->supplies);
- if (ret)
- return ret;
-
- ret = clk_bulk_prepare_enable(ARRAY_SIZE(edp->clks), edp->clks);
- if (ret)
- goto out_disable_supplies;
-
writel(DP_PHY_PD_CTL_PWRDN | DP_PHY_PD_CTL_AUX_PWRDN |
DP_PHY_PD_CTL_PLL_PWRDN | DP_PHY_PD_CTL_DP_CLAMP_EN,
edp->edp + DP_PHY_PD_CTL);
@@ -246,11 +238,6 @@ static int qcom_edp_phy_init(struct phy *phy)
msleep(20);
return 0;
-
-out_disable_supplies:
- regulator_bulk_disable(ARRAY_SIZE(edp->supplies), edp->supplies);
-
- return ret;
}
static int qcom_edp_set_voltages(struct qcom_edp *edp, const struct phy_configure_opts_dp *dp_opts)
@@ -721,6 +708,8 @@ static int qcom_edp_phy_power_on(struct phy *phy)
u32 val;
u8 cfg1;
+ pm_runtime_get_sync(&phy->dev);
+
ret = edp->cfg->ver_ops->com_power_on(edp);
if (ret)
return ret;
@@ -841,6 +830,8 @@ static int qcom_edp_phy_power_off(struct phy *phy)
writel(DP_PHY_PD_CTL_PSR_PWRDN, edp->edp + DP_PHY_PD_CTL);
+ pm_runtime_put(&phy->dev);
+
return 0;
}
@@ -856,23 +847,12 @@ static int qcom_edp_phy_set_mode(struct phy *phy, enum phy_mode mode, int submod
return 0;
}
-static int qcom_edp_phy_exit(struct phy *phy)
-{
- struct qcom_edp *edp = phy_get_drvdata(phy);
-
- clk_bulk_disable_unprepare(ARRAY_SIZE(edp->clks), edp->clks);
- regulator_bulk_disable(ARRAY_SIZE(edp->supplies), edp->supplies);
-
- return 0;
-}
-
static const struct phy_ops qcom_edp_ops = {
.init = qcom_edp_phy_init,
.configure = qcom_edp_phy_configure,
.power_on = qcom_edp_phy_power_on,
.power_off = qcom_edp_phy_power_off,
.set_mode = qcom_edp_phy_set_mode,
- .exit = qcom_edp_phy_exit,
.owner = THIS_MODULE,
};
@@ -1036,6 +1016,32 @@ static int qcom_edp_clks_register(struct qcom_edp *edp, struct device_node *np)
return devm_of_clk_add_hw_provider(edp->dev, of_clk_hw_onecell_get, data);
}
+static int __maybe_unused qcom_edp_runtime_suspend(struct device *dev)
+{
+ struct qcom_edp *edp = dev_get_drvdata(dev);
+
+ dev_err(dev, "Suspending DP phy\n");
+
+ clk_bulk_disable_unprepare(ARRAY_SIZE(edp->clks), edp->clks);
+ regulator_bulk_disable(ARRAY_SIZE(edp->supplies), edp->supplies);
+
+ return 0;
+}
+
+static int __maybe_unused qcom_edp_runtime_resume(struct device *dev)
+{
+ struct qcom_edp *edp = dev_get_drvdata(dev);
+ int ret;
+
+ dev_err(dev, "Resuming DP phy\n");
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(edp->supplies), edp->supplies);
+ if (ret)
+ return ret;
+
+ return clk_bulk_prepare_enable(ARRAY_SIZE(edp->clks), edp->clks);
+}
+
static int qcom_edp_phy_probe(struct platform_device *pdev)
{
struct phy_provider *phy_provider;
@@ -1091,20 +1097,57 @@ static int qcom_edp_phy_probe(struct platform_device *pdev)
return ret;
}
- ret = qcom_edp_clks_register(edp, pdev->dev.of_node);
- if (ret)
+ ret = regulator_bulk_enable(ARRAY_SIZE(edp->supplies), edp->supplies);
+ if (ret) {
+ dev_err(dev, "failed to enable regulators, err=%d\n", ret);
return ret;
+ }
+
+ ret = clk_bulk_prepare_enable(ARRAY_SIZE(edp->clks), edp->clks);
+ if (ret) {
+ dev_err(dev, "failed to enable clocks, err=%d\n", ret);
+ goto err_disable_regulators;
+ }
+
+ ret = qcom_edp_clks_register(edp, pdev->dev.of_node);
+ if (ret) {
+ dev_err(dev, "failed to register PHY clocks, err=%d\n", ret);
+ goto err_disable_clocks;
+ }
edp->phy = devm_phy_create(dev, pdev->dev.of_node, &qcom_edp_ops);
if (IS_ERR(edp->phy)) {
dev_err(dev, "failed to register phy\n");
- return PTR_ERR(edp->phy);
+ ret = PTR_ERR(edp->phy);
+ goto err_disable_clocks;
}
+ pm_runtime_set_active(dev);
+ ret = devm_pm_runtime_enable(dev);
+ if (ret)
+ goto err_disable_clocks;
+ /*
+ * Prevent runtime pm from being ON by default. Users can enable
+ * it using power/control in sysfs.
+ */
+ pm_runtime_forbid(dev);
+
+ dev_set_drvdata(dev, edp);
phy_set_drvdata(edp->phy, edp);
phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
- return PTR_ERR_OR_ZERO(phy_provider);
+ if (IS_ERR(phy_provider))
+ goto err_disable_clocks;
+
+ return 0;
+
+err_disable_clocks:
+ clk_bulk_disable_unprepare(ARRAY_SIZE(edp->clks), edp->clks);
+
+err_disable_regulators:
+ regulator_bulk_disable(ARRAY_SIZE(edp->supplies), edp->supplies);
+
+ return ret;
}
static const struct of_device_id qcom_edp_phy_match_table[] = {
@@ -1117,10 +1160,16 @@ static const struct of_device_id qcom_edp_phy_match_table[] = {
};
MODULE_DEVICE_TABLE(of, qcom_edp_phy_match_table);
+static const struct dev_pm_ops qcom_edp_pm_ops = {
+ SET_RUNTIME_PM_OPS(qcom_edp_runtime_suspend,
+ qcom_edp_runtime_resume, NULL)
+};
+
static struct platform_driver qcom_edp_phy_driver = {
.probe = qcom_edp_phy_probe,
.driver = {
.name = "qcom-edp-phy",
+ .pm = &qcom_edp_pm_ops,
.of_match_table = qcom_edp_phy_match_table,
},
};
---
base-commit: 9aaeb87ce1e966169a57f53a02ba05b30880ffb8
change-id: 20240907-phy-qcom-edp-enable-runtime-pm-6fad07af8947
Best regards,
--
Abel Vesa <abel.vesa@...aro.org>
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