03.12.2019 19:19, Thierry Reding пишет:
> From: Thierry Reding <[email protected]>
>
> 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: Daniel Vetter <[email protected]>
> Signed-off-by: Thierry Reding <[email protected]>
> ---
> drivers/gpu/drm/tegra/sor.c | 24 +++++++++++++++++++-----
> 1 file changed, 19 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c
> index 615cb319fa8b..2200f4cd397a 100644
> --- a/drivers/gpu/drm/tegra/sor.c
> +++ b/drivers/gpu/drm/tegra/sor.c
> @@ -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);
> +}
These functions should be annotated with __maybe_unused attribute.
> 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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