[PATCH v5 2/2] drm/bridge: anx7625: add suspend / resume hooks

[Pi-Hsun Shih]

Add suspend / resume hooks for anx7625 driver, that power off the device
on suspend and power on the device on resume if it was previously
powered.

Signed-off-by: Pi-Hsun Shih <pihsun at chromium.org>
---

Changes in v5:
* Disable irq and flush workqueue in suspend hook, so the irq handler
  won't be run during suspend.

Changes in v3, v4:
* No change.

---
 drivers/gpu/drm/bridge/analogix/anx7625.c | 32 +++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index e1bf31eafe22..8fb76ca66e5b 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -1705,7 +1705,39 @@ static int __maybe_unused anx7625_runtime_pm_resume(struct device *dev)
 	return 0;
 }
 
+static int __maybe_unused anx7625_resume(struct device *dev)
+{
+	struct anx7625_data *ctx = dev_get_drvdata(dev);
+
+	if (!ctx->pdata.intp_irq)
+		return 0;
+
+	if (!pm_runtime_enabled(dev) || !pm_runtime_suspended(dev)) {
+		enable_irq(ctx->pdata.intp_irq);
+		anx7625_runtime_pm_resume(dev);
+	}
+
+	return 0;
+}
+
+static int __maybe_unused anx7625_suspend(struct device *dev)
+{
+	struct anx7625_data *ctx = dev_get_drvdata(dev);
+
+	if (!ctx->pdata.intp_irq)
+		return 0;
+
+	if (!pm_runtime_enabled(dev) || !pm_runtime_suspended(dev)) {
+		anx7625_runtime_pm_suspend(dev);
+		disable_irq(ctx->pdata.intp_irq);
+		flush_workqueue(ctx->workqueue);
+	}
+
+	return 0;
+}
+
 static const struct dev_pm_ops anx7625_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(anx7625_suspend, anx7625_resume)
 	SET_RUNTIME_PM_OPS(anx7625_runtime_pm_suspend,
 			   anx7625_runtime_pm_resume, NULL)
 };
-- 
2.31.1.751.gd2f1c929bd-goog