[mirror_ubuntu-focal-kernel.git] / drivers / gpu / drm / msm / hdmi / hdmi_connector.c

/*
 * Copyright (C) 2013 Red Hat
 * Author: Rob Clark <robdclark@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <linux/gpio.h>
#include <linux/pinctrl/consumer.h>

#include "msm_kms.h"
#include "hdmi.h"

struct hdmi_connector {
	struct drm_connector base;
	struct hdmi *hdmi;
	struct work_struct hpd_work;
};
#define to_hdmi_connector(x) container_of(x, struct hdmi_connector, base)

static void msm_hdmi_phy_reset(struct hdmi *hdmi)
{
	unsigned int val;

	val = hdmi_read(hdmi, REG_HDMI_PHY_CTRL);

	if (val & HDMI_PHY_CTRL_SW_RESET_LOW) {
		/* pull low */
		hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
				val & ~HDMI_PHY_CTRL_SW_RESET);
	} else {
		/* pull high */
		hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
				val | HDMI_PHY_CTRL_SW_RESET);
	}

	if (val & HDMI_PHY_CTRL_SW_RESET_PLL_LOW) {
		/* pull low */
		hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
				val & ~HDMI_PHY_CTRL_SW_RESET_PLL);
	} else {
		/* pull high */
		hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
				val | HDMI_PHY_CTRL_SW_RESET_PLL);
	}

	msleep(100);

	if (val & HDMI_PHY_CTRL_SW_RESET_LOW) {
		/* pull high */
		hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
				val | HDMI_PHY_CTRL_SW_RESET);
	} else {
		/* pull low */
		hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
				val & ~HDMI_PHY_CTRL_SW_RESET);
	}

	if (val & HDMI_PHY_CTRL_SW_RESET_PLL_LOW) {
		/* pull high */
		hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
				val | HDMI_PHY_CTRL_SW_RESET_PLL);
	} else {
		/* pull low */
		hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
				val & ~HDMI_PHY_CTRL_SW_RESET_PLL);
	}
}

static int gpio_config(struct hdmi *hdmi, bool on)
{
	struct device *dev = &hdmi->pdev->dev;
	const struct hdmi_platform_config *config = hdmi->config;
	int ret, i;

	if (on) {
		for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) {
			struct hdmi_gpio_data gpio = config->gpios[i];

			if (gpio.num != -1) {
				ret = gpio_request(gpio.num, gpio.label);
				if (ret) {
					dev_err(dev,
						"'%s'(%d) gpio_request failed: %d\n",
						gpio.label, gpio.num, ret);
					goto err;
				}

				if (gpio.output) {
					gpio_direction_output(gpio.num,
							      gpio.value);
				} else {
					gpio_direction_input(gpio.num);
					gpio_set_value_cansleep(gpio.num,
								gpio.value);
				}
			}
		}

		DBG("gpio on");
	} else {
		for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) {
			struct hdmi_gpio_data gpio = config->gpios[i];

			if (gpio.num == -1)
				continue;

			if (gpio.output) {
				int value = gpio.value ? 0 : 1;

				gpio_set_value_cansleep(gpio.num, value);
			}

			gpio_free(gpio.num);
		};

		DBG("gpio off");
	}

	return 0;
err:
	while (i--) {
		if (config->gpios[i].num != -1)
			gpio_free(config->gpios[i].num);
	}

	return ret;
}

static void enable_hpd_clocks(struct hdmi *hdmi, bool enable)
{
	const struct hdmi_platform_config *config = hdmi->config;
	struct device *dev = &hdmi->pdev->dev;
	int i, ret;

	if (enable) {
		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)
					dev_warn(dev,
						 "failed to set clk %s (%d)\n",
						 config->hpd_clk_names[i], ret);
			}

			ret = clk_prepare_enable(hdmi->hpd_clks[i]);
			if (ret) {
				dev_err(dev,
					"failed to enable hpd clk: %s (%d)\n",
					config->hpd_clk_names[i], ret);
			}
		}
	} else {
		for (i = config->hpd_clk_cnt - 1; i >= 0; i--)
			clk_disable_unprepare(hdmi->hpd_clks[i]);
	}
}

static int hpd_enable(struct hdmi_connector *hdmi_connector)
{
	struct hdmi *hdmi = hdmi_connector->hdmi;
	const struct hdmi_platform_config *config = hdmi->config;
	struct device *dev = &hdmi->pdev->dev;
	uint32_t hpd_ctrl;
	int i, ret;
	unsigned long flags;

	for (i = 0; i < config->hpd_reg_cnt; i++) {
		ret = regulator_enable(hdmi->hpd_regs[i]);
		if (ret) {
			dev_err(dev, "failed to enable hpd regulator: %s (%d)\n",
					config->hpd_reg_names[i], ret);
			goto fail;
		}
	}

	ret = pinctrl_pm_select_default_state(dev);
	if (ret) {
		dev_err(dev, "pinctrl state chg failed: %d\n", ret);
		goto fail;
	}

	ret = gpio_config(hdmi, true);
	if (ret) {
		dev_err(dev, "failed to configure GPIOs: %d\n", ret);
		goto fail;
	}

	pm_runtime_get_sync(dev);
	enable_hpd_clocks(hdmi, true);

	msm_hdmi_set_mode(hdmi, false);
	msm_hdmi_phy_reset(hdmi);
	msm_hdmi_set_mode(hdmi, true);

	hdmi_write(hdmi, REG_HDMI_USEC_REFTIMER, 0x0001001b);

	/* enable HPD events: */
	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL,
			HDMI_HPD_INT_CTRL_INT_CONNECT |
			HDMI_HPD_INT_CTRL_INT_EN);

	/* set timeout to 4.1ms (max) for hardware debounce */
	spin_lock_irqsave(&hdmi->reg_lock, flags);
	hpd_ctrl = hdmi_read(hdmi, REG_HDMI_HPD_CTRL);
	hpd_ctrl |= HDMI_HPD_CTRL_TIMEOUT(0x1fff);

	/* Toggle HPD circuit to trigger HPD sense */
	hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
			~HDMI_HPD_CTRL_ENABLE & hpd_ctrl);
	hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
			HDMI_HPD_CTRL_ENABLE | hpd_ctrl);
	spin_unlock_irqrestore(&hdmi->reg_lock, flags);

	return 0;

fail:
	return ret;
}

static void hdp_disable(struct hdmi_connector *hdmi_connector)
{
	struct hdmi *hdmi = hdmi_connector->hdmi;
	const struct hdmi_platform_config *config = hdmi->config;
	struct device *dev = &hdmi->pdev->dev;
	int i, ret = 0;

	/* Disable HPD interrupt */
	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, 0);

	msm_hdmi_set_mode(hdmi, false);

	enable_hpd_clocks(hdmi, false);
	pm_runtime_put_autosuspend(dev);

	ret = gpio_config(hdmi, false);
	if (ret)
		dev_warn(dev, "failed to unconfigure GPIOs: %d\n", ret);

	ret = pinctrl_pm_select_sleep_state(dev);
	if (ret)
		dev_warn(dev, "pinctrl state chg failed: %d\n", ret);

	for (i = 0; i < config->hpd_reg_cnt; i++) {
		ret = regulator_disable(hdmi->hpd_regs[i]);
		if (ret)
			dev_warn(dev, "failed to disable hpd regulator: %s (%d)\n",
					config->hpd_reg_names[i], ret);
	}
}

static void
msm_hdmi_hotplug_work(struct work_struct *work)
{
	struct hdmi_connector *hdmi_connector =
		container_of(work, struct hdmi_connector, hpd_work);
	struct drm_connector *connector = &hdmi_connector->base;
	drm_helper_hpd_irq_event(connector->dev);
}

void msm_hdmi_connector_irq(struct drm_connector *connector)
{
	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
	struct hdmi *hdmi = hdmi_connector->hdmi;
	uint32_t hpd_int_status, hpd_int_ctrl;

	/* Process HPD: */
	hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);
	hpd_int_ctrl   = hdmi_read(hdmi, REG_HDMI_HPD_INT_CTRL);

	if ((hpd_int_ctrl & HDMI_HPD_INT_CTRL_INT_EN) &&
			(hpd_int_status & HDMI_HPD_INT_STATUS_INT)) {
		bool detected = !!(hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED);

		/* ack & disable (temporarily) HPD events: */
		hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL,
			HDMI_HPD_INT_CTRL_INT_ACK);

		DBG("status=%04x, ctrl=%04x", hpd_int_status, hpd_int_ctrl);

		/* detect disconnect if we are connected or visa versa: */
		hpd_int_ctrl = HDMI_HPD_INT_CTRL_INT_EN;
		if (!detected)
			hpd_int_ctrl |= HDMI_HPD_INT_CTRL_INT_CONNECT;
		hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, hpd_int_ctrl);

		queue_work(hdmi->workq, &hdmi_connector->hpd_work);
	}
}

static enum drm_connector_status detect_reg(struct hdmi *hdmi)
{
	uint32_t hpd_int_status;

	pm_runtime_get_sync(&hdmi->pdev->dev);
	enable_hpd_clocks(hdmi, true);

	hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);

	enable_hpd_clocks(hdmi, false);
	pm_runtime_put_autosuspend(&hdmi->pdev->dev);

	return (hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED) ?
			connector_status_connected : connector_status_disconnected;
}

#define HPD_GPIO_INDEX	2
static enum drm_connector_status detect_gpio(struct hdmi *hdmi)
{
	const struct hdmi_platform_config *config = hdmi->config;
	struct hdmi_gpio_data hpd_gpio = config->gpios[HPD_GPIO_INDEX];

	return gpio_get_value(hpd_gpio.num) ?
			connector_status_connected :
			connector_status_disconnected;
}

static enum drm_connector_status hdmi_connector_detect(
		struct drm_connector *connector, bool force)
{
	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
	struct hdmi *hdmi = hdmi_connector->hdmi;
	const struct hdmi_platform_config *config = hdmi->config;
	struct hdmi_gpio_data hpd_gpio = config->gpios[HPD_GPIO_INDEX];
	enum drm_connector_status stat_gpio, stat_reg;
	int retry = 20;

	/*
	 * some platforms may not have hpd gpio. Rely only on the status
	 * provided by REG_HDMI_HPD_INT_STATUS in this case.
	 */
	if (hpd_gpio.num == -1)
		return detect_reg(hdmi);

	do {
		stat_gpio = detect_gpio(hdmi);
		stat_reg  = detect_reg(hdmi);

		if (stat_gpio == stat_reg)
			break;

		mdelay(10);
	} while (--retry);

	/* the status we get from reading gpio seems to be more reliable,
	 * so trust that one the most if we didn't manage to get hdmi and
	 * gpio status to agree:
	 */
	if (stat_gpio != stat_reg) {
		DBG("HDMI_HPD_INT_STATUS tells us: %d", stat_reg);
		DBG("hpd gpio tells us: %d", stat_gpio);
	}

	return stat_gpio;
}

static void hdmi_connector_destroy(struct drm_connector *connector)
{
	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);

	hdp_disable(hdmi_connector);

	drm_connector_cleanup(connector);

	kfree(hdmi_connector);
}

static int msm_hdmi_connector_get_modes(struct drm_connector *connector)
{
	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
	struct hdmi *hdmi = hdmi_connector->hdmi;
	struct edid *edid;
	uint32_t hdmi_ctrl;
	int ret = 0;

	hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL);
	hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl | HDMI_CTRL_ENABLE);

	edid = drm_get_edid(connector, hdmi->i2c);

	hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl);

	hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid);
	drm_connector_update_edid_property(connector, edid);

	if (edid) {
		ret = drm_add_edid_modes(connector, edid);
		kfree(edid);
	}

	return ret;
}

static int msm_hdmi_connector_mode_valid(struct drm_connector *connector,
				 struct drm_display_mode *mode)
{
	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
	struct hdmi *hdmi = hdmi_connector->hdmi;
	const struct hdmi_platform_config *config = hdmi->config;
	struct msm_drm_private *priv = connector->dev->dev_private;
	struct msm_kms *kms = priv->kms;
	long actual, requested;

	requested = 1000 * mode->clock;
	actual = kms->funcs->round_pixclk(kms,
			requested, hdmi_connector->hdmi->encoder);

	/* for mdp5/apq8074, we manage our own pixel clk (as opposed to
	 * mdp4/dtv stuff where pixel clk is assigned to mdp/encoder
	 * instead):
	 */
	if (config->pwr_clk_cnt > 0)
		actual = clk_round_rate(hdmi->pwr_clks[0], actual);

	DBG("requested=%ld, actual=%ld", requested, actual);

	if (actual != requested)
		return MODE_CLOCK_RANGE;

	return 0;
}

static const struct drm_connector_funcs hdmi_connector_funcs = {
	.detect = hdmi_connector_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.destroy = hdmi_connector_destroy,
	.reset = drm_atomic_helper_connector_reset,
	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};

static const struct drm_connector_helper_funcs msm_hdmi_connector_helper_funcs = {
	.get_modes = msm_hdmi_connector_get_modes,
	.mode_valid = msm_hdmi_connector_mode_valid,
};

/* initialize connector */
struct drm_connector *msm_hdmi_connector_init(struct hdmi *hdmi)
{
	struct drm_connector *connector = NULL;
	struct hdmi_connector *hdmi_connector;
	int ret;

	hdmi_connector = kzalloc(sizeof(*hdmi_connector), GFP_KERNEL);
	if (!hdmi_connector)
		return ERR_PTR(-ENOMEM);

	hdmi_connector->hdmi = hdmi;
	INIT_WORK(&hdmi_connector->hpd_work, msm_hdmi_hotplug_work);

	connector = &hdmi_connector->base;

	drm_connector_init(hdmi->dev, connector, &hdmi_connector_funcs,
			DRM_MODE_CONNECTOR_HDMIA);
	drm_connector_helper_add(connector, &msm_hdmi_connector_helper_funcs);

	connector->polled = DRM_CONNECTOR_POLL_CONNECT |
			DRM_CONNECTOR_POLL_DISCONNECT;

	connector->interlace_allowed = 0;
	connector->doublescan_allowed = 0;

	ret = hpd_enable(hdmi_connector);
	if (ret) {
		dev_err(&hdmi->pdev->dev, "failed to enable HPD: %d\n", ret);
		return ERR_PTR(ret);
	}

	drm_connector_attach_encoder(connector, hdmi->encoder);

	return connector;
}
Commit	Line	Data
c8afe684 RC	1	/*
	2	* Copyright (C) 2013 Red Hat
	3	* Author: Rob Clark <robdclark@gmail.com>
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms of the GNU General Public License version 2 as published by
	7	* the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*
	14	* You should have received a copy of the GNU General Public License along with
	15	* this program. If not, see <http://www.gnu.org/licenses/>.
	16	*/
	17
	18	#include <linux/gpio.h>
865807d0	19	#include <linux/pinctrl/consumer.h>
c8afe684	20
dd2da6e3	21	#include "msm_kms.h"
c8afe684 RC	22	#include "hdmi.h"
	23
	24	struct hdmi_connector {
a3376e3e RC	25	struct drm_connector base;
a3376e3e RC	26	struct hdmi *hdmi;
dada25bd	27	struct work_struct hpd_work;
c8afe684 RC	28	};
	29	#define to_hdmi_connector(x) container_of(x, struct hdmi_connector, base)
	30
fcda50c8	31	static void msm_hdmi_phy_reset(struct hdmi *hdmi)
da328552 SV	32	{
	33	unsigned int val;
	34
	35	val = hdmi_read(hdmi, REG_HDMI_PHY_CTRL);
	36
	37	if (val & HDMI_PHY_CTRL_SW_RESET_LOW) {
	38	/* pull low */
	39	hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
	40	val & ~HDMI_PHY_CTRL_SW_RESET);
	41	} else {
	42	/* pull high */
	43	hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
	44	val \| HDMI_PHY_CTRL_SW_RESET);
	45	}
	46
	47	if (val & HDMI_PHY_CTRL_SW_RESET_PLL_LOW) {
	48	/* pull low */
	49	hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
	50	val & ~HDMI_PHY_CTRL_SW_RESET_PLL);
	51	} else {
	52	/* pull high */
	53	hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
	54	val \| HDMI_PHY_CTRL_SW_RESET_PLL);
	55	}
	56
	57	msleep(100);
	58
	59	if (val & HDMI_PHY_CTRL_SW_RESET_LOW) {
	60	/* pull high */
	61	hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
	62	val \| HDMI_PHY_CTRL_SW_RESET);
	63	} else {
	64	/* pull low */
	65	hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
	66	val & ~HDMI_PHY_CTRL_SW_RESET);
	67	}
	68
	69	if (val & HDMI_PHY_CTRL_SW_RESET_PLL_LOW) {
	70	/* pull high */
	71	hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
	72	val \| HDMI_PHY_CTRL_SW_RESET_PLL);
	73	} else {
	74	/* pull low */
	75	hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
	76	val & ~HDMI_PHY_CTRL_SW_RESET_PLL);
	77	}
	78	}
	79
c8afe684 RC	80	static int gpio_config(struct hdmi *hdmi, bool on)
c8afe684 RC	81	{
5e4eb82f	82	struct device *dev = &hdmi->pdev->dev;
dada25bd	83	const struct hdmi_platform_config *config = hdmi->config;
dc50f782	84	int ret, i;
c8afe684 RC	85
c8afe684 RC	86	if (on) {
dc50f782 AT	87	for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) {
	88	struct hdmi_gpio_data gpio = config->gpios[i];
	89
	90	if (gpio.num != -1) {
	91	ret = gpio_request(gpio.num, gpio.label);
	92	if (ret) {
	93	dev_err(dev,
	94	"'%s'(%d) gpio_request failed: %d\n",
	95	gpio.label, gpio.num, ret);
	96	goto err;
	97	}
	98
	99	if (gpio.output) {
	100	gpio_direction_output(gpio.num,
	101	gpio.value);
	102	} else {
	103	gpio_direction_input(gpio.num);
	104	gpio_set_value_cansleep(gpio.num,
	105	gpio.value);
	106	}
3a84f846	107	}
c8afe684	108	}
dada25bd	109
c8afe684 RC	110	DBG("gpio on");
c8afe684 RC	111	} else {
dc50f782 AT	112	for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) {
dc50f782 AT	113	struct hdmi_gpio_data gpio = config->gpios[i];
3a84f846	114
c899f935 AT	115	if (gpio.num == -1)
	116	continue;
	117
dc50f782 AT	118	if (gpio.output) {
dc50f782 AT	119	int value = gpio.value ? 0 : 1;
3a84f846	120
dc50f782 AT	121	gpio_set_value_cansleep(gpio.num, value);
dc50f782 AT	122	}
dada25bd	123
dc50f782 AT	124	gpio_free(gpio.num);
dc50f782 AT	125	};
1930f38a	126
c8afe684 RC	127	DBG("gpio off");
	128	}
	129
	130	return 0;
dc50f782	131	err:
c899f935 AT	132	while (i--) {
	133	if (config->gpios[i].num != -1)
	134	gpio_free(config->gpios[i].num);
	135	}
c8afe684	136
c8afe684 RC	137	return ret;
	138	}
	139
6ed9ed48 AT	140	static void enable_hpd_clocks(struct hdmi *hdmi, bool enable)
	141	{
	142	const struct hdmi_platform_config *config = hdmi->config;
	143	struct device *dev = &hdmi->pdev->dev;
	144	int i, ret;
	145
	146	if (enable) {
	147	for (i = 0; i < config->hpd_clk_cnt; i++) {
	148	if (config->hpd_freq && config->hpd_freq[i]) {
	149	ret = clk_set_rate(hdmi->hpd_clks[i],
	150	config->hpd_freq[i]);
	151	if (ret)
	152	dev_warn(dev,
	153	"failed to set clk %s (%d)\n",
	154	config->hpd_clk_names[i], ret);
	155	}
	156
	157	ret = clk_prepare_enable(hdmi->hpd_clks[i]);
	158	if (ret) {
	159	dev_err(dev,
	160	"failed to enable hpd clk: %s (%d)\n",
	161	config->hpd_clk_names[i], ret);
	162	}
	163	}
	164	} else {
	165	for (i = config->hpd_clk_cnt - 1; i >= 0; i--)
	166	clk_disable_unprepare(hdmi->hpd_clks[i]);
	167	}
	168	}
	169
c8afe684 RC	170	static int hpd_enable(struct hdmi_connector *hdmi_connector)
c8afe684 RC	171	{
a3376e3e	172	struct hdmi *hdmi = hdmi_connector->hdmi;
dada25bd	173	const struct hdmi_platform_config *config = hdmi->config;
5e4eb82f	174	struct device *dev = &hdmi->pdev->dev;
c8afe684	175	uint32_t hpd_ctrl;
dada25bd	176	int i, ret;
c6a57a50	177	unsigned long flags;
c8afe684	178
e6d7a16f JW	179	for (i = 0; i < config->hpd_reg_cnt; i++) {
	180	ret = regulator_enable(hdmi->hpd_regs[i]);
	181	if (ret) {
5e4eb82f	182	dev_err(dev, "failed to enable hpd regulator: %s (%d)\n",
e6d7a16f JW	183	config->hpd_reg_names[i], ret);
	184	goto fail;
	185	}
	186	}
	187
865807d0 SV	188	ret = pinctrl_pm_select_default_state(dev);
	189	if (ret) {
	190	dev_err(dev, "pinctrl state chg failed: %d\n", ret);
	191	goto fail;
	192	}
	193
c8afe684 RC	194	ret = gpio_config(hdmi, true);
c8afe684 RC	195	if (ret) {
5e4eb82f	196	dev_err(dev, "failed to configure GPIOs: %d\n", ret);
c8afe684 RC	197	goto fail;
	198	}
	199
6ed9ed48 AT	200	pm_runtime_get_sync(dev);
6ed9ed48 AT	201	enable_hpd_clocks(hdmi, true);
c8afe684	202
fcda50c8 AB	203	msm_hdmi_set_mode(hdmi, false);
	204	msm_hdmi_phy_reset(hdmi);
	205	msm_hdmi_set_mode(hdmi, true);
c8afe684 RC	206
	207	hdmi_write(hdmi, REG_HDMI_USEC_REFTIMER, 0x0001001b);
	208
	209	/* enable HPD events: */
	210	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL,
	211	HDMI_HPD_INT_CTRL_INT_CONNECT \|
	212	HDMI_HPD_INT_CTRL_INT_EN);
	213
	214	/* set timeout to 4.1ms (max) for hardware debounce */
c6a57a50	215	spin_lock_irqsave(&hdmi->reg_lock, flags);
c8afe684 RC	216	hpd_ctrl = hdmi_read(hdmi, REG_HDMI_HPD_CTRL);
	217	hpd_ctrl \|= HDMI_HPD_CTRL_TIMEOUT(0x1fff);
	218
	219	/* Toggle HPD circuit to trigger HPD sense */
	220	hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
	221	~HDMI_HPD_CTRL_ENABLE & hpd_ctrl);
	222	hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
	223	HDMI_HPD_CTRL_ENABLE \| hpd_ctrl);
c6a57a50	224	spin_unlock_irqrestore(&hdmi->reg_lock, flags);
c8afe684 RC	225
	226	return 0;
	227
	228	fail:
	229	return ret;
	230	}
	231
e6d7a16f	232	static void hdp_disable(struct hdmi_connector *hdmi_connector)
c8afe684	233	{
a3376e3e	234	struct hdmi *hdmi = hdmi_connector->hdmi;
dada25bd	235	const struct hdmi_platform_config *config = hdmi->config;
5e4eb82f	236	struct device *dev = &hdmi->pdev->dev;
dada25bd	237	int i, ret = 0;
c8afe684 RC	238
	239	/* Disable HPD interrupt */
	240	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, 0);
	241
fcda50c8	242	msm_hdmi_set_mode(hdmi, false);
c8afe684	243
6ed9ed48 AT	244	enable_hpd_clocks(hdmi, false);
6ed9ed48 AT	245	pm_runtime_put_autosuspend(dev);
c8afe684 RC	246
c8afe684 RC	247	ret = gpio_config(hdmi, false);
e6d7a16f	248	if (ret)
5e4eb82f	249	dev_warn(dev, "failed to unconfigure GPIOs: %d\n", ret);
c8afe684	250
865807d0 SV	251	ret = pinctrl_pm_select_sleep_state(dev);
	252	if (ret)
	253	dev_warn(dev, "pinctrl state chg failed: %d\n", ret);
	254
e6d7a16f JW	255	for (i = 0; i < config->hpd_reg_cnt; i++) {
	256	ret = regulator_disable(hdmi->hpd_regs[i]);
	257	if (ret)
5e4eb82f	258	dev_warn(dev, "failed to disable hpd regulator: %s (%d)\n",
e6d7a16f JW	259	config->hpd_reg_names[i], ret);
e6d7a16f JW	260	}
c8afe684 RC	261	}
c8afe684 RC	262
dada25bd	263	static void
fcda50c8	264	msm_hdmi_hotplug_work(struct work_struct *work)
dada25bd RC	265	{
	266	struct hdmi_connector *hdmi_connector =
	267	container_of(work, struct hdmi_connector, hpd_work);
	268	struct drm_connector *connector = &hdmi_connector->base;
	269	drm_helper_hpd_irq_event(connector->dev);
	270	}
	271
fcda50c8	272	void msm_hdmi_connector_irq(struct drm_connector *connector)
c8afe684	273	{
a3376e3e RC	274	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
a3376e3e RC	275	struct hdmi *hdmi = hdmi_connector->hdmi;
c8afe684 RC	276	uint32_t hpd_int_status, hpd_int_ctrl;
	277
	278	/* Process HPD: */
	279	hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);
	280	hpd_int_ctrl = hdmi_read(hdmi, REG_HDMI_HPD_INT_CTRL);
	281
	282	if ((hpd_int_ctrl & HDMI_HPD_INT_CTRL_INT_EN) &&
	283	(hpd_int_status & HDMI_HPD_INT_STATUS_INT)) {
	284	bool detected = !!(hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED);
	285
ff2f974e	286	/* ack & disable (temporarily) HPD events: */
c8afe684	287	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL,
ff2f974e JW	288	HDMI_HPD_INT_CTRL_INT_ACK);
	289
	290	DBG("status=%04x, ctrl=%04x", hpd_int_status, hpd_int_ctrl);
c8afe684	291
c8afe684 RC	292	/* detect disconnect if we are connected or visa versa: */
	293	hpd_int_ctrl = HDMI_HPD_INT_CTRL_INT_EN;
	294	if (!detected)
	295	hpd_int_ctrl \|= HDMI_HPD_INT_CTRL_INT_CONNECT;
	296	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, hpd_int_ctrl);
dada25bd	297
c6a57a50	298	queue_work(hdmi->workq, &hdmi_connector->hpd_work);
c8afe684 RC	299	}
	300	}
	301
3189650d RC	302	static enum drm_connector_status detect_reg(struct hdmi *hdmi)
3189650d RC	303	{
6ed9ed48 AT	304	uint32_t hpd_int_status;
	305
	306	pm_runtime_get_sync(&hdmi->pdev->dev);
	307	enable_hpd_clocks(hdmi, true);
	308
	309	hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);
	310
	311	enable_hpd_clocks(hdmi, false);
	312	pm_runtime_put_autosuspend(&hdmi->pdev->dev);
	313
3189650d RC	314	return (hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED) ?
	315	connector_status_connected : connector_status_disconnected;
	316	}
	317
dc50f782	318	#define HPD_GPIO_INDEX 2
3189650d RC	319	static enum drm_connector_status detect_gpio(struct hdmi *hdmi)
	320	{
	321	const struct hdmi_platform_config *config = hdmi->config;
dc50f782 AT	322	struct hdmi_gpio_data hpd_gpio = config->gpios[HPD_GPIO_INDEX];
	323
	324	return gpio_get_value(hpd_gpio.num) ?
3189650d RC	325	connector_status_connected :
	326	connector_status_disconnected;
	327	}
	328
c8afe684 RC	329	static enum drm_connector_status hdmi_connector_detect(
	330	struct drm_connector *connector, bool force)
	331	{
a3376e3e RC	332	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
a3376e3e RC	333	struct hdmi *hdmi = hdmi_connector->hdmi;
c95ea162 AT	334	const struct hdmi_platform_config *config = hdmi->config;
c95ea162 AT	335	struct hdmi_gpio_data hpd_gpio = config->gpios[HPD_GPIO_INDEX];
3189650d	336	enum drm_connector_status stat_gpio, stat_reg;
c8afe684 RC	337	int retry = 20;
c8afe684 RC	338
c95ea162 AT	339	/*
	340	* some platforms may not have hpd gpio. Rely only on the status
	341	* provided by REG_HDMI_HPD_INT_STATUS in this case.
	342	*/
	343	if (hpd_gpio.num == -1)
	344	return detect_reg(hdmi);
	345
3189650d RC	346	do {
	347	stat_gpio = detect_gpio(hdmi);
	348	stat_reg = detect_reg(hdmi);
c8afe684	349
3189650d	350	if (stat_gpio == stat_reg)
dada25bd	351	break;
3189650d	352
c8afe684	353	mdelay(10);
3189650d RC	354	} while (--retry);
	355
	356	/* the status we get from reading gpio seems to be more reliable,
	357	* so trust that one the most if we didn't manage to get hdmi and
	358	* gpio status to agree:
	359	*/
	360	if (stat_gpio != stat_reg) {
	361	DBG("HDMI_HPD_INT_STATUS tells us: %d", stat_reg);
	362	DBG("hpd gpio tells us: %d", stat_gpio);
c8afe684 RC	363	}
c8afe684 RC	364
3189650d	365	return stat_gpio;
c8afe684 RC	366	}
	367
	368	static void hdmi_connector_destroy(struct drm_connector *connector)
	369	{
a3376e3e	370	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
c8afe684 RC	371
	372	hdp_disable(hdmi_connector);
	373
c8afe684 RC	374	drm_connector_cleanup(connector);
c8afe684 RC	375
c8afe684 RC	376	kfree(hdmi_connector);
	377	}
	378
fcda50c8	379	static int msm_hdmi_connector_get_modes(struct drm_connector *connector)
c8afe684	380	{
a3376e3e RC	381	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
a3376e3e RC	382	struct hdmi *hdmi = hdmi_connector->hdmi;
c8afe684 RC	383	struct edid *edid;
	384	uint32_t hdmi_ctrl;
	385	int ret = 0;
	386
	387	hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL);
	388	hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl \| HDMI_CTRL_ENABLE);
	389
	390	edid = drm_get_edid(connector, hdmi->i2c);
	391
	392	hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl);
	393
c6a57a50	394	hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid);
c555f023	395	drm_connector_update_edid_property(connector, edid);
c8afe684 RC	396
	397	if (edid) {
	398	ret = drm_add_edid_modes(connector, edid);
	399	kfree(edid);
	400	}
	401
	402	return ret;
	403	}
	404
fcda50c8	405	static int msm_hdmi_connector_mode_valid(struct drm_connector *connector,
c8afe684 RC	406	struct drm_display_mode *mode)
c8afe684 RC	407	{
a3376e3e	408	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
dada25bd RC	409	struct hdmi *hdmi = hdmi_connector->hdmi;
dada25bd RC	410	const struct hdmi_platform_config *config = hdmi->config;
c8afe684 RC	411	struct msm_drm_private *priv = connector->dev->dev_private;
	412	struct msm_kms *kms = priv->kms;
	413	long actual, requested;
	414
	415	requested = 1000 * mode->clock;
	416	actual = kms->funcs->round_pixclk(kms,
a3376e3e	417	requested, hdmi_connector->hdmi->encoder);
c8afe684	418
dada25bd RC	419	/* for mdp5/apq8074, we manage our own pixel clk (as opposed to
	420	* mdp4/dtv stuff where pixel clk is assigned to mdp/encoder
	421	* instead):
	422	*/
	423	if (config->pwr_clk_cnt > 0)
	424	actual = clk_round_rate(hdmi->pwr_clks[0], actual);
	425
c8afe684 RC	426	DBG("requested=%ld, actual=%ld", requested, actual);
	427
	428	if (actual != requested)
	429	return MODE_CLOCK_RANGE;
	430
	431	return 0;
	432	}
	433
	434	static const struct drm_connector_funcs hdmi_connector_funcs = {
c8afe684 RC	435	.detect = hdmi_connector_detect,
	436	.fill_modes = drm_helper_probe_single_connector_modes,
	437	.destroy = hdmi_connector_destroy,
3e7849ef RC	438	.reset = drm_atomic_helper_connector_reset,
	439	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
	440	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
c8afe684 RC	441	};
c8afe684 RC	442
fcda50c8 AB	443	static const struct drm_connector_helper_funcs msm_hdmi_connector_helper_funcs = {
	444	.get_modes = msm_hdmi_connector_get_modes,
	445	.mode_valid = msm_hdmi_connector_mode_valid,
c8afe684 RC	446	};
	447
	448	/* initialize connector */
fcda50c8	449	struct drm_connector msm_hdmi_connector_init(struct hdmi hdmi)
c8afe684 RC	450	{
	451	struct drm_connector *connector = NULL;
	452	struct hdmi_connector *hdmi_connector;
	453	int ret;
	454
	455	hdmi_connector = kzalloc(sizeof(*hdmi_connector), GFP_KERNEL);
8208ed93 AT	456	if (!hdmi_connector)
8208ed93 AT	457	return ERR_PTR(-ENOMEM);
c8afe684	458
d1a717bd	459	hdmi_connector->hdmi = hdmi;
fcda50c8	460	INIT_WORK(&hdmi_connector->hpd_work, msm_hdmi_hotplug_work);
a3376e3e RC	461
a3376e3e RC	462	connector = &hdmi_connector->base;
c8afe684	463
a3376e3e	464	drm_connector_init(hdmi->dev, connector, &hdmi_connector_funcs,
c8afe684	465	DRM_MODE_CONNECTOR_HDMIA);
fcda50c8	466	drm_connector_helper_add(connector, &msm_hdmi_connector_helper_funcs);
c8afe684	467
3189650d RC	468	connector->polled = DRM_CONNECTOR_POLL_CONNECT \|
3189650d RC	469	DRM_CONNECTOR_POLL_DISCONNECT;
c8afe684	470
cddfaebd	471	connector->interlace_allowed = 0;
c8afe684 RC	472	connector->doublescan_allowed = 0;
c8afe684 RC	473
c8afe684 RC	474	ret = hpd_enable(hdmi_connector);
c8afe684 RC	475	if (ret) {
5e4eb82f	476	dev_err(&hdmi->pdev->dev, "failed to enable HPD: %d\n", ret);
8208ed93	477	return ERR_PTR(ret);
c8afe684 RC	478	}
c8afe684 RC	479
cde4c44d	480	drm_connector_attach_encoder(connector, hdmi->encoder);
c8afe684 RC	481
c8afe684 RC	482	return connector;
c8afe684	483	}