1 // SPDX-License-Identifier: GPL-2.0-only
12 #include "hdmi.h"
14 static void msm_hdmi_phy_reset(struct hdmi *hdmi)  in msm_hdmi_phy_reset()  argument
18 	val = hdmi_read(hdmi, REG_HDMI_PHY_CTRL);  in msm_hdmi_phy_reset()
22 		hdmi_write(hdmi, REG_HDMI_PHY_CTRL,  in msm_hdmi_phy_reset()
26 		hdmi_write(hdmi, REG_HDMI_PHY_CTRL,  in msm_hdmi_phy_reset()
32 		hdmi_write(hdmi, REG_HDMI_PHY_CTRL,  in msm_hdmi_phy_reset()
36 		hdmi_write(hdmi, REG_HDMI_PHY_CTRL,  in msm_hdmi_phy_reset()
44 		hdmi_write(hdmi, REG_HDMI_PHY_CTRL,  in msm_hdmi_phy_reset()
48 		hdmi_write(hdmi, REG_HDMI_PHY_CTRL,  in msm_hdmi_phy_reset()
54 		hdmi_write(hdmi, REG_HDMI_PHY_CTRL,  in msm_hdmi_phy_reset()
58 		hdmi_write(hdmi, REG_HDMI_PHY_CTRL,  in msm_hdmi_phy_reset()
66 	struct hdmi *hdmi = hdmi_bridge->hdmi;  in msm_hdmi_hpd_enable()  local
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()
80 	msm_hdmi_set_mode(hdmi, false);  in msm_hdmi_hpd_enable()
81 	msm_hdmi_phy_reset(hdmi);  in msm_hdmi_hpd_enable()
82 	msm_hdmi_set_mode(hdmi, true);  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()
87 	hdmi_write(hdmi, REG_HDMI_USEC_REFTIMER, 0x0001001b);  in msm_hdmi_hpd_enable()
90 	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL,  in msm_hdmi_hpd_enable()
95 	spin_lock_irqsave(&hdmi->reg_lock, flags);  in msm_hdmi_hpd_enable()
96 	hpd_ctrl = hdmi_read(hdmi, REG_HDMI_HPD_CTRL);  in msm_hdmi_hpd_enable()
100 	hdmi_write(hdmi, REG_HDMI_HPD_CTRL,  in msm_hdmi_hpd_enable()
102 	hdmi_write(hdmi, REG_HDMI_HPD_CTRL,  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()  local
111 	struct device *dev = &hdmi->pdev->dev;  in msm_hdmi_hpd_disable()
114 	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, 0);  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()  local
131 	hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);  in msm_hdmi_hpd_irq()
132 	hpd_int_ctrl   = hdmi_read(hdmi, REG_HDMI_HPD_INT_CTRL);  in msm_hdmi_hpd_irq()
139 		hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL,  in msm_hdmi_hpd_irq()
148 		hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, hpd_int_ctrl);  in msm_hdmi_hpd_irq()
150 		queue_work(hdmi->workq, &hdmi_bridge->hpd_work);  in msm_hdmi_hpd_irq()
154 static enum drm_connector_status detect_reg(struct hdmi *hdmi)  in detect_reg()  argument
159 	ret = pm_runtime_resume_and_get(&hdmi->pdev->dev);  in detect_reg()
163 	hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);  in detect_reg()
166 	pm_runtime_put(&hdmi->pdev->dev);  in detect_reg()
173 static enum drm_connector_status detect_gpio(struct hdmi *hdmi)  in detect_gpio()  argument
175 	return gpiod_get_value(hdmi->hpd_gpiod) ?  in detect_gpio()
184 	struct hdmi *hdmi = hdmi_bridge->hdmi;  in msm_hdmi_bridge_detect()  local
190 	 * provided by REG_HDMI_HPD_INT_STATUS in this case.  in msm_hdmi_bridge_detect()
192 	if (!hdmi->hpd_gpiod)  in msm_hdmi_bridge_detect()
193 		return detect_reg(hdmi);  in msm_hdmi_bridge_detect()
196 		stat_gpio = detect_gpio(hdmi);  in msm_hdmi_bridge_detect()
197 		stat_reg  = detect_reg(hdmi);  in msm_hdmi_bridge_detect()
203 	} while (--retry);  in msm_hdmi_bridge_detect()
206 	 * so trust that one the most if we didn't manage to get hdmi and  in msm_hdmi_bridge_detect()