1 // SPDX-License-Identifier: GPL-2.0-only
8 #include <linux/gpio/consumer.h>
66 	struct hdmi *hdmi = hdmi_bridge->hdmi;  in msm_hdmi_hpd_enable()
67 	struct device *dev = &hdmi->pdev->dev;  in msm_hdmi_hpd_enable()
72 	if (hdmi->hpd_gpiod)  in msm_hdmi_hpd_enable()
73 		gpiod_set_value_cansleep(hdmi->hpd_gpiod, 1);  in msm_hdmi_hpd_enable()
79 	mutex_lock(&hdmi->state_mutex);  in msm_hdmi_hpd_enable()
84 	hdmi->hpd_enabled = true;  in msm_hdmi_hpd_enable()
85 	mutex_unlock(&hdmi->state_mutex);  in msm_hdmi_hpd_enable()
89 	/* enable HPD events: */  in msm_hdmi_hpd_enable()
95 	spin_lock_irqsave(&hdmi->reg_lock, flags);  in msm_hdmi_hpd_enable()
99 	/* Toggle HPD circuit to trigger HPD sense */  in msm_hdmi_hpd_enable()
104 	spin_unlock_irqrestore(&hdmi->reg_lock, flags);  in msm_hdmi_hpd_enable()
110 	struct hdmi *hdmi = hdmi_bridge->hdmi;  in msm_hdmi_hpd_disable()
111 	struct device *dev = &hdmi->pdev->dev;  in msm_hdmi_hpd_disable()
113 	/* Disable HPD interrupt */  in msm_hdmi_hpd_disable()
116 	mutex_lock(&hdmi->state_mutex);  in msm_hdmi_hpd_disable()
117 	hdmi->hpd_enabled = false;  in msm_hdmi_hpd_disable()
118 	msm_hdmi_set_mode(hdmi, hdmi->power_on);  in msm_hdmi_hpd_disable()
119 	mutex_unlock(&hdmi->state_mutex);  in msm_hdmi_hpd_disable()
127 	struct hdmi *hdmi = hdmi_bridge->hdmi;  in msm_hdmi_hpd_irq()
130 	/* Process HPD: */  in msm_hdmi_hpd_irq()
138 		/* ack & disable (temporarily) HPD events: */  in msm_hdmi_hpd_irq()
150 		queue_work(hdmi->workq, &hdmi_bridge->hpd_work);  in msm_hdmi_hpd_irq()
159 	ret = pm_runtime_resume_and_get(&hdmi->pdev->dev);  in detect_reg()
166 	pm_runtime_put(&hdmi->pdev->dev);  in detect_reg()
175 	return gpiod_get_value(hdmi->hpd_gpiod) ?  in detect_gpio()
184 	struct hdmi *hdmi = hdmi_bridge->hdmi;  in msm_hdmi_bridge_detect()
189 	 * some platforms may not have hpd gpio. Rely only on the status  in msm_hdmi_bridge_detect()
192 	if (!hdmi->hpd_gpiod)  in msm_hdmi_bridge_detect()
203 	} while (--retry);  in msm_hdmi_bridge_detect()
205 	/* the status we get from reading gpio seems to be more reliable,  in msm_hdmi_bridge_detect()
207 	 * gpio status to agree:  in msm_hdmi_bridge_detect()
211 		DBG("hpd gpio tells us: %d", stat_gpio);  in msm_hdmi_bridge_detect()