[PATCH 2/4] phy: phy-rockchip-samsung-hdptx: Enable runtime PM at PHY core level

Cristian Ciocaltea
2024-06-17T21:56:27Z

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.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
---
drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c | 24 ++++++-----------------
1 file changed, 6 insertions(+), 18 deletions(-)

diff --git a/drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c b/drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c
index 3bd9b62b23dc..72de287282eb 100644
--- a/drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c
+++ b/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),

--
2.45.2