[PATCH v5 15/21] drm: bridge: dw_hdmi: Add common suspend helper

[Jonas Karlman <jonas@kwiboo.se>]

Add a dw_hdmi_suspend() helper as the suspend-side counterpart to
dw_hdmi_resume() and call it from the i.MX8MP, Amlogic and Rockchip
platform PM suspend callbacks.

This is a preparatory change to route suspend handling through common
dw-hdmi code so follow-up changes can add shared suspend cleanup in one
place.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
---
v5: New patch
---
 drivers/gpu/drm/bridge/imx/imx8mp-hdmi-tx.c |  4 ++++
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c   |  5 +++++
 drivers/gpu/drm/meson/meson_dw_hdmi.c       |  2 ++
 drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 11 ++++++++++-
 include/drm/bridge/dw_hdmi.h                |  1 +
 5 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-tx.c b/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-tx.c
index 8e8cfd66f23b..f15b3f8e1dbc 100644
--- a/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-tx.c
+++ b/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-tx.c
@@ -176,6 +176,10 @@ static void imx8mp_dw_hdmi_remove(struct platform_device *pdev)
 
 static int imx8mp_dw_hdmi_pm_suspend(struct device *dev)
 {
+	struct imx8mp_hdmi *hdmi = dev_get_drvdata(dev);
+
+	dw_hdmi_suspend(hdmi->dw_hdmi);
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index bf893c754539..a6f2702bca83 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -3568,6 +3568,11 @@ void dw_hdmi_unbind(struct dw_hdmi *hdmi)
 }
 EXPORT_SYMBOL_GPL(dw_hdmi_unbind);
 
+void dw_hdmi_suspend(struct dw_hdmi *hdmi)
+{
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_suspend);
+
 void dw_hdmi_resume(struct dw_hdmi *hdmi)
 {
 	dw_hdmi_init_hw(hdmi);
diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
index fef1702acb14..9ba83bf4787c 100644
--- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
@@ -809,6 +809,8 @@ static int __maybe_unused meson_dw_hdmi_pm_suspend(struct device *dev)
 	if (!meson_dw_hdmi)
 		return 0;
 
+	dw_hdmi_suspend(meson_dw_hdmi->hdmi);
+
 	/* Reset TOP */
 	meson_dw_hdmi->data->top_write(meson_dw_hdmi,
 				       HDMITX_TOP_SW_RESET, 0);
diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index 0dc1eb5d2ae3..9677424075eb 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
@@ -651,6 +651,15 @@ static void dw_hdmi_rockchip_remove(struct platform_device *pdev)
 	component_del(&pdev->dev, &dw_hdmi_rockchip_ops);
 }
 
+static int __maybe_unused dw_hdmi_rockchip_suspend(struct device *dev)
+{
+	struct rockchip_hdmi *hdmi = dev_get_drvdata(dev);
+
+	dw_hdmi_suspend(hdmi->hdmi);
+
+	return 0;
+}
+
 static int __maybe_unused dw_hdmi_rockchip_resume(struct device *dev)
 {
 	struct rockchip_hdmi *hdmi = dev_get_drvdata(dev);
@@ -661,7 +670,7 @@ static int __maybe_unused dw_hdmi_rockchip_resume(struct device *dev)
 }
 
 static const struct dev_pm_ops dw_hdmi_rockchip_pm = {
-	SET_SYSTEM_SLEEP_PM_OPS(NULL, dw_hdmi_rockchip_resume)
+	SET_SYSTEM_SLEEP_PM_OPS(dw_hdmi_rockchip_suspend, dw_hdmi_rockchip_resume)
 };
 
 struct platform_driver dw_hdmi_rockchip_pltfm_driver = {
diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
index 8500dd4f99d8..d587c4076a25 100644
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -184,6 +184,7 @@ struct dw_hdmi *dw_hdmi_bind(struct platform_device *pdev,
 			     struct drm_encoder *encoder,
 			     const struct dw_hdmi_plat_data *plat_data);
 
+void dw_hdmi_suspend(struct dw_hdmi *hdmi);
 void dw_hdmi_resume(struct dw_hdmi *hdmi);
 
 void dw_hdmi_setup_rx_sense(struct dw_hdmi *hdmi, bool hpd, bool rx_sense);
-- 
2.54.0