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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: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Mark Zhang <markz@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
hifive-unleashed-5.1
Thierry Reding 2014-12-18 17:15:25 +01:00
parent 666cb87332
commit 359ae687db
1 changed files with 25 additions and 0 deletions
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25
drivers/gpu/drm/tegra/drm.c
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@ -996,6 +996,30 @@ static int host1x_drm_remove(struct host1x_device *dev)
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[] = {
{ .compatible = "nvidia,tegra20-dc", },
{ .compatible = "nvidia,tegra20-hdmi", },
@ -1017,6 +1041,7 @@ static const struct of_device_id host1x_drm_subdevs[] = {
static struct host1x_driver host1x_drm_driver = {
.driver = {
.name = "drm",
.pm = &host1x_drm_pm_ops,
},
.probe = host1x_drm_probe,
.remove = host1x_drm_remove,