[PATCH 13/15] drm/msm/hdmi: pair msm_hdmi_phy_powerup with msm_hdmi_phy_powerdown

[Dmitry Baryshkov]

In preparation to converting MSM HDMI driver to use PHY framework, which
requires phy_power_on() calls to be paired with phy_power_off(), add a
conditional call to msm_hdmi_phy_powerdown() before the call to
msm_hdmi_phy_powerup().

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
---
 drivers/gpu/drm/msm/hdmi/hdmi.h        | 1 +
 drivers/gpu/drm/msm/hdmi/hdmi_bridge.c | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.h b/drivers/gpu/drm/msm/hdmi/hdmi.h
index 2d405da63bd0..46ae7ef9bc98 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.h
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.h
@@ -42,6 +42,7 @@ struct hdmi {
 
 	/* video state: */
 	bool power_on;
+	bool phy_power_on;
 	unsigned long int pixclock;
 
 	void __iomem *mmio;
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
index bb10b35194ff..1bbd76e595af 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
@@ -148,7 +148,11 @@ static void msm_hdmi_bridge_atomic_pre_enable(struct drm_bridge *bridge,
 		msm_hdmi_audio_update(hdmi);
 	}
 
+	if (hdmi->phy_power_on)
+		msm_hdmi_phy_powerdown(phy);
+
 	msm_hdmi_phy_powerup(phy, hdmi->pixclock);
+	hdmi->phy_power_on = true;
 
 	msm_hdmi_set_mode(hdmi, true);
 
@@ -170,6 +174,7 @@ static void msm_hdmi_bridge_atomic_post_disable(struct drm_bridge *bridge,
 	msm_hdmi_set_mode(hdmi, false);
 
 	msm_hdmi_phy_powerdown(phy);
+	hdmi->phy_power_on = false;
 
 	if (hdmi->power_on) {
 		power_off(bridge);
-- 
2.39.2