SDE: HDMI: Disable HPD if non-pluggable flag is set

For non-pluggable display, HPD hardware should be disabled.
HPD related clocks should also shutdown during suspend.

Change-Id: I59475b07b44c2a7f1784d160263a6bca7701a702
Signed-off-by: Camus Wong <camusw@codeaurora.org>

drivers/gpu/drm/msm/hdmi-staging/sde_hdmi.c

@@ -1342,15 +1342,73 @@ fail:
 	return ret;
 }
 
+int sde_hdmi_core_enable(struct sde_hdmi *sde_hdmi)
+{
+	struct hdmi *hdmi = sde_hdmi->ctrl.ctrl;
+	const struct hdmi_platform_config *config = hdmi->config;
+	struct device *dev = &hdmi->pdev->dev;
+	int i, ret;
+	struct drm_connector *connector;
+	struct msm_drm_private *priv;
+	struct sde_kms *sde_kms;
+
+	connector = hdmi->connector;
+	priv = connector->dev->dev_private;
+	sde_kms = to_sde_kms(priv->kms);
+
+	for (i = 0; i < config->hpd_reg_cnt; i++) {
+		ret = regulator_enable(hdmi->hpd_regs[i]);
+		if (ret) {
+			SDE_ERROR("failed to enable hpd regulator: %s (%d)\n",
+					config->hpd_reg_names[i], ret);
+		}
+	}
+
+	ret = pinctrl_pm_select_default_state(dev);
+	if (ret)
+		SDE_ERROR("pinctrl state chg failed: %d\n", ret);
+
+	ret = _sde_hdmi_gpio_config(hdmi, true);
+	if (ret)
+		SDE_ERROR("failed to configure GPIOs: %d\n", ret);
+
+	for (i = 0; i < config->hpd_clk_cnt; i++) {
+		if (config->hpd_freq && config->hpd_freq[i]) {
+			ret = clk_set_rate(hdmi->hpd_clks[i],
+					config->hpd_freq[i]);
+			if (ret)
+				pr_warn("failed to set clk %s (%d)\n",
+						config->hpd_clk_names[i], ret);
+		}
+
+		ret = clk_prepare_enable(hdmi->hpd_clks[i]);
+		if (ret) {
+			SDE_ERROR("failed to enable hpd clk: %s (%d)\n",
+					config->hpd_clk_names[i], ret);
+		}
+	}
+	sde_hdmi_set_mode(hdmi, true);
+
+	/* Wait for vsync */
+	msleep(20);
+
+	return ret;
+}
+
 static void _sde_hdmi_hdp_disable(struct sde_hdmi *sde_hdmi)
 {
 	struct hdmi *hdmi = sde_hdmi->ctrl.ctrl;
 	const struct hdmi_platform_config *config = hdmi->config;
 	struct device *dev = &hdmi->pdev->dev;
 	int i, ret = 0;
+	unsigned long flags;
 
+	spin_lock_irqsave(&hdmi->reg_lock, flags);
 	/* Disable HPD interrupt */
+	hdmi_write(hdmi, REG_HDMI_HPD_CTRL, 0);
 	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, 0);
+	hdmi_write(hdmi, REG_HDMI_HPD_INT_STATUS, 0);
+	spin_unlock_irqrestore(&hdmi->reg_lock, flags);
 
 	sde_hdmi_set_mode(hdmi, false);
 
@@ -1373,6 +1431,12 @@ static void _sde_hdmi_hdp_disable(struct sde_hdmi *sde_hdmi)
 	}
 }
 
+void sde_hdmi_core_disable(struct sde_hdmi *sde_hdmi)
+{
+	/* HPD contains all the core clock and pwr */
+	_sde_hdmi_hdp_disable(sde_hdmi);
+}
+
 static void _sde_hdmi_cec_update_phys_addr(struct sde_hdmi *display)
 {
 	struct edid *edid = display->edid_ctrl->edid;
@@ -2388,10 +2452,17 @@ int sde_hdmi_connector_post_init(struct drm_connector *connector,
 	hdmi->connector = connector;
 	INIT_WORK(&sde_hdmi->hpd_work, _sde_hdmi_hotplug_work);
 
-	/* Enable HPD detection */
-	rc = _sde_hdmi_hpd_enable(sde_hdmi);
-	if (rc)
-		SDE_ERROR("failed to enable HPD: %d\n", rc);
+	if (sde_hdmi->non_pluggable) {
+		/* Disable HPD interrupt */
+		hdmi_write(hdmi, REG_HDMI_HPD_CTRL, 0);
+		hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, 0);
+		hdmi_write(hdmi, REG_HDMI_HPD_INT_STATUS, 0);
+	} else {
+		/* Enable HPD detection if non_pluggable flag is not defined */
+		rc = _sde_hdmi_hpd_enable(sde_hdmi);
+		if (rc)
+			SDE_ERROR("failed to enable HPD: %d\n", rc);
+	}
 
 	_sde_hdmi_get_tx_version(sde_hdmi);
 
@@ -3147,6 +3218,8 @@ int sde_hdmi_drm_init(struct sde_hdmi *display, struct drm_encoder *enc)
 	if (sde_kms->splash_info.handoff) {
 		sde_hdmi_bridge_power_on(hdmi->bridge);
 		hdmi->power_on = true;
+	} else {
+		hdmi->power_on = false;
 	}
 
 	mutex_unlock(&display->display_lock);

drivers/gpu/drm/msm/hdmi-staging/sde_hdmi.h

@@ -301,6 +301,22 @@ sde_hdmi_connector_detect(struct drm_connector *connector,
 		bool force,
 		void *display);
 
+/**
+ * sde_hdmi_core_enable()- turn on clk and pwr for hdmi core
+ * @sde_hdmi: Pointer to sde_hdmi structure
+ *
+ * Return: error code
+ */
+int sde_hdmi_core_enable(struct sde_hdmi *sde_hdmi);
+
+/**
+ * sde_hdmi_core_disable()- turn off clk and pwr for hdmi core
+ * @sde_hdmi: Pointer to sde_hdmi structure
+ *
+ * Return: none
+ */
+void sde_hdmi_core_disable(struct sde_hdmi *sde_hdmi);
+
 /**
  * sde_hdmi_connector_get_modes - add drm modes via drm_mode_probed_add()
  * @connector: Pointer to drm connector structure

drivers/gpu/drm/msm/hdmi-staging/sde_hdmi_bridge.c

@@ -129,8 +129,22 @@ static void _sde_hdmi_bridge_power_on(struct drm_bridge *bridge)
 	struct sde_hdmi_bridge *sde_hdmi_bridge = to_hdmi_bridge(bridge);
 	struct hdmi *hdmi = sde_hdmi_bridge->hdmi;
 	const struct hdmi_platform_config *config = hdmi->config;
+	struct sde_connector *c_conn = to_sde_connector(hdmi->connector);
+	struct sde_hdmi *display = NULL;
 	int i, ret;
 
+	if (c_conn)
+		display = (struct sde_hdmi *)c_conn->display;
+
+	if (display) {
+		if (display->non_pluggable) {
+			ret = sde_hdmi_core_enable(display);
+			if (ret)
+				SDE_ERROR("failed to enable HDMI core (%d)\n",
+					ret);
+		}
+	}
+
 	for (i = 0; i < config->pwr_reg_cnt; i++) {
 		ret = regulator_enable(hdmi->pwr_regs[i]);
 		if (ret) {
@@ -162,6 +176,8 @@ static void _sde_hdmi_bridge_power_off(struct drm_bridge *bridge)
 	struct sde_hdmi_bridge *sde_hdmi_bridge = to_hdmi_bridge(bridge);
 	struct hdmi *hdmi = sde_hdmi_bridge->hdmi;
 	const struct hdmi_platform_config *config = hdmi->config;
+	struct sde_connector *c_conn = to_sde_connector(hdmi->connector);
+	struct sde_hdmi *display = (struct sde_hdmi *)c_conn->display;
 	int i, ret;
 
 	/* Wait for vsync */
@@ -177,6 +193,10 @@ static void _sde_hdmi_bridge_power_off(struct drm_bridge *bridge)
 					config->pwr_reg_names[i], ret);
 		}
 	}
+
+	if (display->non_pluggable) {
+		sde_hdmi_core_disable(display);
+	}
 }
 
 static int _sde_hdmi_bridge_ddc_clear_irq(struct hdmi *hdmi,
@@ -611,8 +631,10 @@ static void _sde_hdmi_bridge_post_disable(struct drm_bridge *bridge)
 		hdmi->power_on = false;
 	}
 
-	/* Powering-on the controller for HPD */
-	sde_hdmi_ctrl_cfg(hdmi, 1);
+	if (!display->non_pluggable) {
+		/* Powering-on the controller for HPD */
+		sde_hdmi_ctrl_cfg(hdmi, 1);
+	}
 }
 
 static void _sde_hdmi_bridge_set_avi_infoframe(struct hdmi *hdmi,
@@ -822,6 +844,11 @@ static void _sde_hdmi_bridge_mode_set(struct drm_bridge *bridge,
 
 	mode = adjusted_mode;
 
+	if (display->non_pluggable && !hdmi->power_on) {
+		if (sde_hdmi_core_enable(display))
+			pr_err("mode set enable core failured\n");
+	}
+
 	display->dc_enable = mode->private_flags &
 				(MSM_MODE_FLAG_RGB444_DC_ENABLE |
 				 MSM_MODE_FLAG_YUV420_DC_ENABLE);
@@ -898,6 +925,9 @@ static void _sde_hdmi_bridge_mode_set(struct drm_bridge *bridge,
 	_sde_hdmi_save_mode(hdmi, mode);
 	_sde_hdmi_bridge_setup_scrambler(hdmi, mode);
 	_sde_hdmi_bridge_setup_deep_color(hdmi);
+	if (display->non_pluggable && !hdmi->power_on) {
+		sde_hdmi_core_disable(display);
+	}
 }
 
 static bool _sde_hdmi_bridge_mode_fixup(struct drm_bridge *bridge,