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Commit 359ae687 authored by Thierry Reding's avatar Thierry Reding
Browse files

drm/tegra: Add minimal power management 



For now only disable the KMS hotplug polling helper logic upon suspend
and re-enable it on resume.

Reviewed-by: default avatarSean Paul <seanpaul@chromium.org>
Reviewed-by: default avatarMark Zhang <markz@nvidia.com>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 666cb873

drivers/gpu/drm/tegra/drm.c

+25 −0
Original line number Original line Diff line number Diff line
@@ -996,6 +996,30 @@ static int host1x_drm_remove(struct host1x_device *dev) 
	return 0;

	return 0;

}

}





#ifdef CONFIG_PM_SLEEP

static int host1x_drm_suspend(struct device *dev)

{

	struct drm_device *drm = dev_get_drvdata(dev);



	drm_kms_helper_poll_disable(drm);



	return 0;

}



static int host1x_drm_resume(struct device *dev)

{

	struct drm_device *drm = dev_get_drvdata(dev);



	drm_kms_helper_poll_enable(drm);



	return 0;

}

#endif



static const struct dev_pm_ops host1x_drm_pm_ops = {

	SET_SYSTEM_SLEEP_PM_OPS(host1x_drm_suspend, host1x_drm_resume)

};



static const struct of_device_id host1x_drm_subdevs[] = {

static const struct of_device_id host1x_drm_subdevs[] = {

	{ .compatible = "nvidia,tegra20-dc", },

	{ .compatible = "nvidia,tegra20-dc", },

	{ .compatible = "nvidia,tegra20-hdmi", },

	{ .compatible = "nvidia,tegra20-hdmi", },
@@ -1017,6 +1041,7 @@ static const struct of_device_id host1x_drm_subdevs[] = { 
static struct host1x_driver host1x_drm_driver = {

static struct host1x_driver host1x_drm_driver = {

	.driver = {

	.driver = {

		.name = "drm",

		.name = "drm",

		.pm = &host1x_drm_pm_ops,

	},

	},

	.probe = host1x_drm_probe,

	.probe = host1x_drm_probe,

	.remove = host1x_drm_remove,

	.remove = host1x_drm_remove,