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authorThierry Reding <treding@nvidia.com>2019-12-03 19:19:10 +0300
committerThierry Reding <treding@nvidia.com>2019-12-04 15:37:10 +0300
commitbe0b23f28c028bf11e47d16f79c784106286bcb7 (patch)
tree780b8adf5d94c692c92ce0cf6f86e66400631b8b /drivers/gpu
parentc52e167b41940186d0f4d7364950b654b79b3ef7 (diff)
downloadlinux-be0b23f28c028bf11e47d16f79c784106286bcb7.tar.xz
drm/tegra: sor: Implement system suspend/resume
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 <daniel.vetter@ffwll.ch> Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/tegra/sor.c24
1 files 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);
+}
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 = {