1 // SPDX-License-Identifier: GPL-2.0-only
8 #include <linux/gpio/consumer.h>
65 	const struct hdmi_platform_config *config = hdmi->config;  in enable_hpd_clocks()
66 	struct device *dev = &hdmi->pdev->dev;  in enable_hpd_clocks()
70 		for (i = 0; i < config->hpd_clk_cnt; i++) {  in enable_hpd_clocks()
71 			if (config->hpd_freq && config->hpd_freq[i]) {  in enable_hpd_clocks()
72 				ret = clk_set_rate(hdmi->hpd_clks[i],  in enable_hpd_clocks()
73 						   config->hpd_freq[i]);  in enable_hpd_clocks()
77 						 config->hpd_clk_names[i], ret);  in enable_hpd_clocks()
80 			ret = clk_prepare_enable(hdmi->hpd_clks[i]);  in enable_hpd_clocks()
83 					"failed to enable hpd clk: %s (%d)\n",  in enable_hpd_clocks()
84 					config->hpd_clk_names[i], ret);  in enable_hpd_clocks()
88 		for (i = config->hpd_clk_cnt - 1; i >= 0; i--)  in enable_hpd_clocks()
89 			clk_disable_unprepare(hdmi->hpd_clks[i]);  in enable_hpd_clocks()
96 	struct hdmi *hdmi = hdmi_bridge->hdmi;  in msm_hdmi_hpd_enable()
97 	const struct hdmi_platform_config *config = hdmi->config;  in msm_hdmi_hpd_enable()
98 	struct device *dev = &hdmi->pdev->dev;  in msm_hdmi_hpd_enable()
103 	ret = regulator_bulk_enable(config->hpd_reg_cnt, hdmi->hpd_regs);  in msm_hdmi_hpd_enable()
105 		DRM_DEV_ERROR(dev, "failed to enable hpd regulators: %d\n", ret);  in msm_hdmi_hpd_enable()
115 	if (hdmi->hpd_gpiod)  in msm_hdmi_hpd_enable()
116 		gpiod_set_value_cansleep(hdmi->hpd_gpiod, 1);  in msm_hdmi_hpd_enable()
127 	/* enable HPD events: */  in msm_hdmi_hpd_enable()
133 	spin_lock_irqsave(&hdmi->reg_lock, flags);  in msm_hdmi_hpd_enable()
137 	/* Toggle HPD circuit to trigger HPD sense */  in msm_hdmi_hpd_enable()
142 	spin_unlock_irqrestore(&hdmi->reg_lock, flags);  in msm_hdmi_hpd_enable()
152 	struct hdmi *hdmi = hdmi_bridge->hdmi;  in msm_hdmi_hpd_disable()
153 	const struct hdmi_platform_config *config = hdmi->config;  in msm_hdmi_hpd_disable()
154 	struct device *dev = &hdmi->pdev->dev;  in msm_hdmi_hpd_disable()
157 	/* Disable HPD interrupt */  in msm_hdmi_hpd_disable()
169 	ret = regulator_bulk_disable(config->hpd_reg_cnt, hdmi->hpd_regs);  in msm_hdmi_hpd_disable()
171 		dev_warn(dev, "failed to disable hpd regulator: %d\n", ret);  in msm_hdmi_hpd_disable()
177 	struct hdmi *hdmi = hdmi_bridge->hdmi;  in msm_hdmi_hpd_irq()
180 	/* Process HPD: */  in msm_hdmi_hpd_irq()
188 		/* ack & disable (temporarily) HPD events: */  in msm_hdmi_hpd_irq()
200 		queue_work(hdmi->workq, &hdmi_bridge->hpd_work);  in msm_hdmi_hpd_irq()
208 	pm_runtime_get_sync(&hdmi->pdev->dev);  in detect_reg()
214 	pm_runtime_put(&hdmi->pdev->dev);  in detect_reg()
223 	return gpiod_get_value(hdmi->hpd_gpiod) ?  in detect_gpio()
232 	struct hdmi *hdmi = hdmi_bridge->hdmi;  in msm_hdmi_bridge_detect()
237 	 * some platforms may not have hpd gpio. Rely only on the status  in msm_hdmi_bridge_detect()
240 	if (!hdmi->hpd_gpiod)  in msm_hdmi_bridge_detect()
251 	} while (--retry);  in msm_hdmi_bridge_detect()
253 	/* the status we get from reading gpio seems to be more reliable,  in msm_hdmi_bridge_detect()
255 	 * gpio status to agree:  in msm_hdmi_bridge_detect()
259 		DBG("hpd gpio tells us: %d", stat_gpio);  in msm_hdmi_bridge_detect()