Commit be0b23f2 authored by Thierry Reding's avatar Thierry Reding
Browse files

drm/tegra: sor: Implement system suspend/resume 



Upon system suspend, make sure the +5V HDMI regulator is disabled. This
avoids potentially leaking current to the HDMI connector. This also
makes sure that upon resume the regulator is enabled again, which in
some cases is necessary to properly restore the state of the supply on
resume.

Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent c52e167b

drivers/gpu/drm/tegra/sor.c

+19 −5
Original line number Diff line number Diff line
@@ -3912,8 +3912,7 @@ static int tegra_sor_remove(struct platform_device *pdev) 
	return 0;

}



#ifdef CONFIG_PM

static int tegra_sor_suspend(struct device *dev)

static int tegra_sor_runtime_suspend(struct device *dev)

{

	struct tegra_sor *sor = dev_get_drvdata(dev);

	int err;
@@ -3935,7 +3934,7 @@ static int tegra_sor_suspend(struct device *dev) 
	return 0;

}



static int tegra_sor_resume(struct device *dev)

static int tegra_sor_runtime_resume(struct device *dev)

{

	struct tegra_sor *sor = dev_get_drvdata(dev);

	int err;
@@ -3967,10 +3966,25 @@ static int tegra_sor_resume(struct device *dev) 


	return 0;

}

#endif



static int tegra_sor_suspend(struct device *dev)

{

	struct tegra_sor *sor = dev_get_drvdata(dev);



	return regulator_disable(sor->hdmi_supply);

}



static int tegra_sor_resume(struct device *dev)

{

	struct tegra_sor *sor = dev_get_drvdata(dev);



	return regulator_enable(sor->hdmi_supply);

}



static const struct dev_pm_ops tegra_sor_pm_ops = {

	SET_RUNTIME_PM_OPS(tegra_sor_suspend, tegra_sor_resume, NULL)

	SET_RUNTIME_PM_OPS(tegra_sor_runtime_suspend, tegra_sor_runtime_resume,

			   NULL)

	SET_SYSTEM_SLEEP_PM_OPS(tegra_sor_suspend, tegra_sor_resume)

};



struct platform_driver tegra_sor_driver = {

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