[PATCH v10 18/19] drm: bridge: analogix/dp: add panel prepare/unprepare in suspend/resume time

[Yakir Yang <ykk@rock-chips.com>]

Turn off the panel power in suspend time would help to reduce
power waste.

Signed-off-by: Yakir Yang <ykk@rock-chips.com>
---
This patch was introduced in v10.1, suggested by Heiko

Changes in v10: None
Changes in v9: None
Changes in v8: None
Changes in v7: None
Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None

 drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index f5047ac..79ba88e 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -1364,6 +1364,12 @@ int analogix_dp_suspend(struct device *dev)
 	struct analogix_dp_device *dp = dev_get_drvdata(dev);
 
 	clk_disable_unprepare(dp->clock);
+
+	if (dp->plat_data->panel) {
+		if (drm_panel_unprepare(dp->plat_data->panel))
+			DRM_ERROR("failed to turnoff the panel\n");
+	}
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(analogix_dp_suspend);
@@ -1379,6 +1385,13 @@ int analogix_dp_resume(struct device *dev)
 		return ret;
 	}
 
+	if (dp->plat_data->panel) {
+		if (drm_panel_prepare(dp->plat_data->panel)) {
+			DRM_ERROR("failed to setup the panel\n");
+			return -EBUSY;
+		}
+	}
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(analogix_dp_resume);
-- 
1.9.1


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