drm/msm/hdmi: wire in hpd_enable/hpd_disable bridge ops

The HDMI driver already has msm_hdmi_hpd_enable() and
msm_hdmi_hpd_disable() functions. Wire them into the
msm_hdmi_bridge_funcs, so that HPD  can be enabled and disabled
dynamically rather than always having HPD events generation enabled.

Reviewed-by: Jessica Zhang <[email protected]>
Signed-off-by: Dmitry Baryshkov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Dmitry Baryshkov <[email protected]>

Author: lumag

drivers/gpu/drm/msm/hdmi/hdmi.c

@@ -200,12 +200,6 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi,
 		goto fail;
 	}
 
-	ret = msm_hdmi_hpd_enable(hdmi->bridge);
-	if (ret < 0) {
-		DRM_DEV_ERROR(&hdmi->pdev->dev, "failed to enable HPD: %d\n", ret);
-		goto fail;
-	}
-
 	return 0;
 
 fail:
@@ -261,9 +255,6 @@ static void msm_hdmi_unbind(struct device *dev, struct device *master,
 	struct msm_drm_private *priv = dev_get_drvdata(master);
 
 	if (priv->hdmi) {
-		if (priv->hdmi->bridge)
-			msm_hdmi_hpd_disable(priv->hdmi);
-
 		msm_hdmi_destroy(priv->hdmi);
 		priv->hdmi = NULL;
 	}

drivers/gpu/drm/msm/hdmi/hdmi.h

@@ -216,8 +216,8 @@ int msm_hdmi_bridge_init(struct hdmi *hdmi);
 void msm_hdmi_hpd_irq(struct drm_bridge *bridge);
 enum drm_connector_status msm_hdmi_bridge_detect(
 		struct drm_bridge *bridge);
-int msm_hdmi_hpd_enable(struct drm_bridge *bridge);
-void msm_hdmi_hpd_disable(struct hdmi *hdmi);
+void msm_hdmi_hpd_enable(struct drm_bridge *bridge);
+void msm_hdmi_hpd_disable(struct drm_bridge *bridge);
 
 /*
  * i2c adapter for ddc:

drivers/gpu/drm/msm/hdmi/hdmi_bridge.c

@@ -459,6 +459,8 @@ static const struct drm_bridge_funcs msm_hdmi_bridge_funcs = {
 	.atomic_post_disable = msm_hdmi_bridge_atomic_post_disable,
 	.edid_read = msm_hdmi_bridge_edid_read,
 	.detect = msm_hdmi_bridge_detect,
+	.hpd_enable = msm_hdmi_hpd_enable,
+	.hpd_disable = msm_hdmi_hpd_disable,
 	.hdmi_tmds_char_rate_valid = msm_hdmi_bridge_tmds_char_rate_valid,
 	.hdmi_clear_infoframe = msm_hdmi_bridge_clear_infoframe,
 	.hdmi_write_infoframe = msm_hdmi_bridge_write_infoframe,

drivers/gpu/drm/msm/hdmi/hdmi_hpd.c

@@ -60,7 +60,7 @@ static void msm_hdmi_phy_reset(struct hdmi *hdmi)
 	}
 }
 
-int msm_hdmi_hpd_enable(struct drm_bridge *bridge)
+void msm_hdmi_hpd_enable(struct drm_bridge *bridge)
 {
 	struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
 	struct hdmi *hdmi = hdmi_bridge->hdmi;
@@ -73,8 +73,8 @@ int msm_hdmi_hpd_enable(struct drm_bridge *bridge)
 		gpiod_set_value_cansleep(hdmi->hpd_gpiod, 1);
 
 	ret = pm_runtime_resume_and_get(dev);
-	if (ret)
-		return ret;
+	if (WARN_ON(ret))
+		return;
 
 	mutex_lock(&hdmi->state_mutex);
 	msm_hdmi_set_mode(hdmi, false);
@@ -102,12 +102,12 @@ int msm_hdmi_hpd_enable(struct drm_bridge *bridge)
 	hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
 			HDMI_HPD_CTRL_ENABLE | hpd_ctrl);
 	spin_unlock_irqrestore(&hdmi->reg_lock, flags);
-
-	return 0;
 }
 
-void msm_hdmi_hpd_disable(struct hdmi *hdmi)
+void msm_hdmi_hpd_disable(struct drm_bridge *bridge)
 {
+	struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
+	struct hdmi *hdmi = hdmi_bridge->hdmi;
 	struct device *dev = &hdmi->pdev->dev;
 
 	/* Disable HPD interrupt */