On Fri, Dec 19, 2014 at 10:24 AM, Thierry Reding
<thierry.reding@xxxxxxxxx> wrote:
> From: Thierry Reding <treding@xxxxxxxxxx>
>
> For now only disable the KMS hotplug polling helper logic upon suspend
> and re-enable it on resume.
>
> Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
Reviewed-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
> ---
> 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,
> --
> 2.1.3
>
> --
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