Commit fa1ce8cd authored by Guido Gunther's avatar Guido Gunther
Browse files

phy: fsl-imx8-mipi-dphy: Hook into runtime pm



This allows us to shut down the mipi power domain on the imx8. The
alternative would be to drop the dphy from the mipi power domain in the
SOCs device tree and only have the DSI host controller visible there but
since the PD is mostly about the PHY that would defeat it's purpose.

This allows to shut off the power domain hen blanking the LCD panel:

pm_genpd_summary before:

domain                          status          slaves
    /device                                             runtime status
----------------------------------------------------------------------
mipi                            on
    /devices/platform/soc@0/soc@0:bus@30800000/30a00300.dphy  unsupported
    /devices/platform/soc@0/soc@0:bus@30800000/30a00000.mipi_dsi  suspended

after:

mipi                            off-0
    /devices/platform/soc@0/soc@0:bus@30800000/30a00300.dphy  suspended
    /devices/platform/soc@0/soc@0:bus@30800000/30a00000.mipi_dsi  suspended
Signed-off-by: Guido Gunther's avatarGuido Günther <agx@sigxcpu.org>
parent 34435c02
Pipeline #64664 failed with stages
in 204 minutes and 16 seconds
......@@ -14,6 +14,7 @@
#include <linux/of_platform.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
/* DPHY registers */
......@@ -469,6 +470,8 @@ static int mixel_dphy_probe(struct platform_device *pdev)
dev_set_drvdata(dev, priv);
pm_runtime_enable(dev);
phy = devm_phy_create(dev, np, &mixel_dphy_phy_ops);
if (IS_ERR(phy)) {
dev_err(dev, "Failed to create phy %ld\n", PTR_ERR(phy));
......@@ -481,8 +484,15 @@ static int mixel_dphy_probe(struct platform_device *pdev)
return PTR_ERR_OR_ZERO(phy_provider);
}
static int mixel_dphy_remove(struct platform_device *pdev)
{
pm_runtime_disable(&pdev->dev);
return 0;
}
static struct platform_driver mixel_dphy_driver = {
.probe = mixel_dphy_probe,
.remove = mixel_dphy_remove,
.driver = {
.name = "mixel-mipi-dphy",
.of_match_table = mixel_dphy_of_match,
......
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