From: Thierry Reding treding@nvidia.com
For now only disable the KMS hotplug polling helper logic upon suspend and re-enable it on resume.
Signed-off-by: Thierry Reding treding@nvidia.com --- drivers/gpu/drm/tegra/drm.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+)
diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c index 272c2dca3536..16c44b9abbd8 100644 --- a/drivers/gpu/drm/tegra/drm.c +++ b/drivers/gpu/drm/tegra/drm.c @@ -889,6 +889,30 @@ 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", }, @@ -910,6 +934,7 @@ 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,