[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 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;

	if (on) {
		ret = gpio_request(config->ddc_clk_gpio, "HDMI_DDC_CLK");
		if (ret) {
			dev_err(dev, "'%s'(%d) gpio_request failed: %d\n",
				"HDMI_DDC_CLK", config->ddc_clk_gpio, ret);
			goto error1;
		}
		gpio_set_value_cansleep(config->ddc_clk_gpio, 1);

		ret = gpio_request(config->ddc_data_gpio, "HDMI_DDC_DATA");
		if (ret) {
			dev_err(dev, "'%s'(%d) gpio_request failed: %d\n",
				"HDMI_DDC_DATA", config->ddc_data_gpio, ret);
			goto error2;
		}
		gpio_set_value_cansleep(config->ddc_data_gpio, 1);

		ret = gpio_request(config->hpd_gpio, "HDMI_HPD");
		if (ret) {
			dev_err(dev, "'%s'(%d) gpio_request failed: %d\n",
				"HDMI_HPD", config->hpd_gpio, ret);
			goto error3;
		}
		gpio_direction_input(config->hpd_gpio);
		gpio_set_value_cansleep(config->hpd_gpio, 1);

		if (config->mux_en_gpio != -1) {
			ret = gpio_request(config->mux_en_gpio, "HDMI_MUX_EN");
			if (ret) {
				dev_err(dev, "'%s'(%d) gpio_request failed: %d\n",
					"HDMI_MUX_EN", config->mux_en_gpio, ret);
				goto error4;
			}
			gpio_set_value_cansleep(config->mux_en_gpio, 1);
		}

		if (config->mux_sel_gpio != -1) {
			ret = gpio_request(config->mux_sel_gpio, "HDMI_MUX_SEL");
			if (ret) {
				dev_err(dev, "'%s'(%d) gpio_request failed: %d\n",
					"HDMI_MUX_SEL", config->mux_sel_gpio, ret);
				goto error5;
			}
			gpio_set_value_cansleep(config->mux_sel_gpio, 0);
		}

		if (config->mux_lpm_gpio != -1) {
			ret = gpio_request(config->mux_lpm_gpio,
					"HDMI_MUX_LPM");
			if (ret) {
				dev_err(dev,
					"'%s'(%d) gpio_request failed: %d\n",
					"HDMI_MUX_LPM",
					config->mux_lpm_gpio, ret);
				goto error6;
			}
			gpio_set_value_cansleep(config->mux_lpm_gpio, 1);
		}
		DBG("gpio on");
	} else {
		gpio_free(config->ddc_clk_gpio);
		gpio_free(config->ddc_data_gpio);
		gpio_free(config->hpd_gpio);

		if (config->mux_en_gpio != -1) {
			gpio_set_value_cansleep(config->mux_en_gpio, 0);
			gpio_free(config->mux_en_gpio);
		}

		if (config->mux_sel_gpio != -1) {
			gpio_set_value_cansleep(config->mux_sel_gpio, 1);
			gpio_free(config->mux_sel_gpio);
		}

		if (config->mux_lpm_gpio != -1) {
			gpio_set_value_cansleep(config->mux_lpm_gpio, 0);
			gpio_free(config->mux_lpm_gpio);
		}
		DBG("gpio off");
	}

	return 0;

error6:
	if (config->mux_sel_gpio != -1)
		gpio_free(config->mux_sel_gpio);
error5:
	if (config->mux_en_gpio != -1)
		gpio_free(config->mux_en_gpio);
error4:
	gpio_free(config->hpd_gpio);
error3:
	gpio_free(config->ddc_data_gpio);
error2:
	gpio_free(config->ddc_clk_gpio);
error1:
	return ret;
}

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;
	}

	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);
			goto fail;
		}
	}

	hdmi_set_mode(hdmi, false);
	hdmi_phy_reset(hdmi);
	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);

	hdmi_set_mode(hdmi, false);

	for (i = 0; i < config->hpd_clk_cnt; i++)
		clk_disable_unprepare(hdmi->hpd_clks[i]);

	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
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 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 = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);
	return (hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED) ?
			connector_status_connected : connector_status_disconnected;
}

static enum drm_connector_status detect_gpio(struct hdmi *hdmi)
{
	const struct hdmi_platform_config *config = hdmi->config;
	return gpio_get_value(config->hpd_gpio) ?
			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;
	enum drm_connector_status stat_gpio, stat_reg;
	int retry = 20;

	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_unregister(connector);
	drm_connector_cleanup(connector);

	kfree(hdmi_connector);
}

static int 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_mode_connector_update_edid_property(connector, edid);

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

	return ret;
}

static int 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 struct drm_encoder *
hdmi_connector_best_encoder(struct drm_connector *connector)
{
	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
	return hdmi_connector->hdmi->encoder;
}

static const struct drm_connector_funcs hdmi_connector_funcs = {
	.dpms = drm_atomic_helper_connector_dpms,
	.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 hdmi_connector_helper_funcs = {
	.get_modes = hdmi_connector_get_modes,
	.mode_valid = hdmi_connector_mode_valid,
	.best_encoder = hdmi_connector_best_encoder,
};

/* initialize connector */
struct drm_connector *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) {
		ret = -ENOMEM;
		goto fail;
	}

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

	connector = &hdmi_connector->base;

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

	connector->polled = DRM_CONNECTOR_POLL_CONNECT |
			DRM_CONNECTOR_POLL_DISCONNECT;

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

	drm_connector_register(connector);

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

	drm_mode_connector_attach_encoder(connector, hdmi->encoder);

	return connector;

fail:
	if (connector)
		hdmi_connector_destroy(connector);

	return ERR_PTR(ret);
}
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
da328552 SV	31	static void hdmi_phy_reset(struct hdmi *hdmi)
	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;
c8afe684 RC	84	int ret;
	85
	86	if (on) {
	87	ret = gpio_request(config->ddc_clk_gpio, "HDMI_DDC_CLK");
	88	if (ret) {
5e4eb82f	89	dev_err(dev, "'%s'(%d) gpio_request failed: %d\n",
c8afe684 RC	90	"HDMI_DDC_CLK", config->ddc_clk_gpio, ret);
	91	goto error1;
	92	}
dada25bd RC	93	gpio_set_value_cansleep(config->ddc_clk_gpio, 1);
dada25bd RC	94
c8afe684 RC	95	ret = gpio_request(config->ddc_data_gpio, "HDMI_DDC_DATA");
c8afe684 RC	96	if (ret) {
5e4eb82f	97	dev_err(dev, "'%s'(%d) gpio_request failed: %d\n",
c8afe684 RC	98	"HDMI_DDC_DATA", config->ddc_data_gpio, ret);
	99	goto error2;
	100	}
dada25bd RC	101	gpio_set_value_cansleep(config->ddc_data_gpio, 1);
dada25bd RC	102
c8afe684 RC	103	ret = gpio_request(config->hpd_gpio, "HDMI_HPD");
c8afe684 RC	104	if (ret) {
5e4eb82f	105	dev_err(dev, "'%s'(%d) gpio_request failed: %d\n",
c8afe684 RC	106	"HDMI_HPD", config->hpd_gpio, ret);
	107	goto error3;
	108	}
dada25bd RC	109	gpio_direction_input(config->hpd_gpio);
	110	gpio_set_value_cansleep(config->hpd_gpio, 1);
	111
	112	if (config->mux_en_gpio != -1) {
	113	ret = gpio_request(config->mux_en_gpio, "HDMI_MUX_EN");
c8afe684	114	if (ret) {
5e4eb82f	115	dev_err(dev, "'%s'(%d) gpio_request failed: %d\n",
a2fe6cdc	116	"HDMI_MUX_EN", config->mux_en_gpio, ret);
c8afe684 RC	117	goto error4;
c8afe684 RC	118	}
dada25bd RC	119	gpio_set_value_cansleep(config->mux_en_gpio, 1);
	120	}
	121
	122	if (config->mux_sel_gpio != -1) {
	123	ret = gpio_request(config->mux_sel_gpio, "HDMI_MUX_SEL");
	124	if (ret) {
5e4eb82f	125	dev_err(dev, "'%s'(%d) gpio_request failed: %d\n",
dada25bd RC	126	"HDMI_MUX_SEL", config->mux_sel_gpio, ret);
	127	goto error5;
	128	}
	129	gpio_set_value_cansleep(config->mux_sel_gpio, 0);
c8afe684	130	}
1930f38a BG	131
	132	if (config->mux_lpm_gpio != -1) {
	133	ret = gpio_request(config->mux_lpm_gpio,
	134	"HDMI_MUX_LPM");
	135	if (ret) {
5e4eb82f	136	dev_err(dev,
1930f38a BG	137	"'%s'(%d) gpio_request failed: %d\n",
	138	"HDMI_MUX_LPM",
	139	config->mux_lpm_gpio, ret);
	140	goto error6;
	141	}
	142	gpio_set_value_cansleep(config->mux_lpm_gpio, 1);
	143	}
c8afe684 RC	144	DBG("gpio on");
	145	} else {
	146	gpio_free(config->ddc_clk_gpio);
	147	gpio_free(config->ddc_data_gpio);
	148	gpio_free(config->hpd_gpio);
	149
dada25bd RC	150	if (config->mux_en_gpio != -1) {
	151	gpio_set_value_cansleep(config->mux_en_gpio, 0);
	152	gpio_free(config->mux_en_gpio);
	153	}
	154
	155	if (config->mux_sel_gpio != -1) {
	156	gpio_set_value_cansleep(config->mux_sel_gpio, 1);
	157	gpio_free(config->mux_sel_gpio);
c8afe684	158	}
1930f38a BG	159
	160	if (config->mux_lpm_gpio != -1) {
	161	gpio_set_value_cansleep(config->mux_lpm_gpio, 0);
	162	gpio_free(config->mux_lpm_gpio);
	163	}
c8afe684 RC	164	DBG("gpio off");
	165	}
	166
	167	return 0;
	168
1930f38a BG	169	error6:
	170	if (config->mux_sel_gpio != -1)
	171	gpio_free(config->mux_sel_gpio);
dada25bd RC	172	error5:
	173	if (config->mux_en_gpio != -1)
	174	gpio_free(config->mux_en_gpio);
c8afe684 RC	175	error4:
	176	gpio_free(config->hpd_gpio);
	177	error3:
	178	gpio_free(config->ddc_data_gpio);
	179	error2:
	180	gpio_free(config->ddc_clk_gpio);
	181	error1:
	182	return ret;
	183	}
	184
	185	static int hpd_enable(struct hdmi_connector *hdmi_connector)
	186	{
a3376e3e	187	struct hdmi *hdmi = hdmi_connector->hdmi;
dada25bd	188	const struct hdmi_platform_config *config = hdmi->config;
5e4eb82f	189	struct device *dev = &hdmi->pdev->dev;
c8afe684	190	uint32_t hpd_ctrl;
dada25bd	191	int i, ret;
c6a57a50	192	unsigned long flags;
c8afe684	193
e6d7a16f JW	194	for (i = 0; i < config->hpd_reg_cnt; i++) {
	195	ret = regulator_enable(hdmi->hpd_regs[i]);
	196	if (ret) {
5e4eb82f	197	dev_err(dev, "failed to enable hpd regulator: %s (%d)\n",
e6d7a16f JW	198	config->hpd_reg_names[i], ret);
	199	goto fail;
	200	}
	201	}
	202
865807d0 SV	203	ret = pinctrl_pm_select_default_state(dev);
	204	if (ret) {
	205	dev_err(dev, "pinctrl state chg failed: %d\n", ret);
	206	goto fail;
	207	}
	208
c8afe684 RC	209	ret = gpio_config(hdmi, true);
c8afe684 RC	210	if (ret) {
5e4eb82f	211	dev_err(dev, "failed to configure GPIOs: %d\n", ret);
c8afe684 RC	212	goto fail;
	213	}
	214
dada25bd	215	for (i = 0; i < config->hpd_clk_cnt; i++) {
b77f47e7 SV	216	if (config->hpd_freq && config->hpd_freq[i]) {
	217	ret = clk_set_rate(hdmi->hpd_clks[i],
	218	config->hpd_freq[i]);
	219	if (ret)
5e4eb82f	220	dev_warn(dev, "failed to set clk %s (%d)\n",
b77f47e7 SV	221	config->hpd_clk_names[i], ret);
	222	}
	223
dada25bd RC	224	ret = clk_prepare_enable(hdmi->hpd_clks[i]);
dada25bd RC	225	if (ret) {
5e4eb82f	226	dev_err(dev, "failed to enable hpd clk: %s (%d)\n",
dada25bd RC	227	config->hpd_clk_names[i], ret);
	228	goto fail;
	229	}
c8afe684 RC	230	}
c8afe684 RC	231
c8afe684	232	hdmi_set_mode(hdmi, false);
da328552	233	hdmi_phy_reset(hdmi);
c8afe684 RC	234	hdmi_set_mode(hdmi, true);
	235
	236	hdmi_write(hdmi, REG_HDMI_USEC_REFTIMER, 0x0001001b);
	237
	238	/* enable HPD events: */
	239	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL,
	240	HDMI_HPD_INT_CTRL_INT_CONNECT \|
	241	HDMI_HPD_INT_CTRL_INT_EN);
	242
	243	/* set timeout to 4.1ms (max) for hardware debounce */
c6a57a50	244	spin_lock_irqsave(&hdmi->reg_lock, flags);
c8afe684 RC	245	hpd_ctrl = hdmi_read(hdmi, REG_HDMI_HPD_CTRL);
	246	hpd_ctrl \|= HDMI_HPD_CTRL_TIMEOUT(0x1fff);
	247
	248	/* Toggle HPD circuit to trigger HPD sense */
	249	hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
	250	~HDMI_HPD_CTRL_ENABLE & hpd_ctrl);
	251	hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
	252	HDMI_HPD_CTRL_ENABLE \| hpd_ctrl);
c6a57a50	253	spin_unlock_irqrestore(&hdmi->reg_lock, flags);
c8afe684 RC	254
	255	return 0;
	256
	257	fail:
	258	return ret;
	259	}
	260
e6d7a16f	261	static void hdp_disable(struct hdmi_connector *hdmi_connector)
c8afe684	262	{
a3376e3e	263	struct hdmi *hdmi = hdmi_connector->hdmi;
dada25bd	264	const struct hdmi_platform_config *config = hdmi->config;
5e4eb82f	265	struct device *dev = &hdmi->pdev->dev;
dada25bd	266	int i, ret = 0;
c8afe684 RC	267
	268	/* Disable HPD interrupt */
	269	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, 0);
	270
	271	hdmi_set_mode(hdmi, false);
	272
dada25bd RC	273	for (i = 0; i < config->hpd_clk_cnt; i++)
dada25bd RC	274	clk_disable_unprepare(hdmi->hpd_clks[i]);
c8afe684 RC	275
c8afe684 RC	276	ret = gpio_config(hdmi, false);
e6d7a16f	277	if (ret)
5e4eb82f	278	dev_warn(dev, "failed to unconfigure GPIOs: %d\n", ret);
c8afe684	279
865807d0 SV	280	ret = pinctrl_pm_select_sleep_state(dev);
	281	if (ret)
	282	dev_warn(dev, "pinctrl state chg failed: %d\n", ret);
	283
e6d7a16f JW	284	for (i = 0; i < config->hpd_reg_cnt; i++) {
	285	ret = regulator_disable(hdmi->hpd_regs[i]);
	286	if (ret)
5e4eb82f	287	dev_warn(dev, "failed to disable hpd regulator: %s (%d)\n",
e6d7a16f JW	288	config->hpd_reg_names[i], ret);
e6d7a16f JW	289	}
c8afe684 RC	290	}
c8afe684 RC	291
dada25bd RC	292	static void
	293	hotplug_work(struct work_struct *work)
	294	{
	295	struct hdmi_connector *hdmi_connector =
	296	container_of(work, struct hdmi_connector, hpd_work);
	297	struct drm_connector *connector = &hdmi_connector->base;
	298	drm_helper_hpd_irq_event(connector->dev);
	299	}
	300
c8afe684 RC	301	void hdmi_connector_irq(struct drm_connector *connector)
c8afe684 RC	302	{
a3376e3e RC	303	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
a3376e3e RC	304	struct hdmi *hdmi = hdmi_connector->hdmi;
c8afe684 RC	305	uint32_t hpd_int_status, hpd_int_ctrl;
	306
	307	/* Process HPD: */
	308	hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);
	309	hpd_int_ctrl = hdmi_read(hdmi, REG_HDMI_HPD_INT_CTRL);
	310
	311	if ((hpd_int_ctrl & HDMI_HPD_INT_CTRL_INT_EN) &&
	312	(hpd_int_status & HDMI_HPD_INT_STATUS_INT)) {
	313	bool detected = !!(hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED);
	314
ff2f974e	315	/* ack & disable (temporarily) HPD events: */
c8afe684	316	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL,
ff2f974e JW	317	HDMI_HPD_INT_CTRL_INT_ACK);
	318
	319	DBG("status=%04x, ctrl=%04x", hpd_int_status, hpd_int_ctrl);
c8afe684	320
c8afe684 RC	321	/* detect disconnect if we are connected or visa versa: */
	322	hpd_int_ctrl = HDMI_HPD_INT_CTRL_INT_EN;
	323	if (!detected)
	324	hpd_int_ctrl \|= HDMI_HPD_INT_CTRL_INT_CONNECT;
	325	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, hpd_int_ctrl);
dada25bd	326
c6a57a50	327	queue_work(hdmi->workq, &hdmi_connector->hpd_work);
c8afe684 RC	328	}
	329	}
	330
3189650d RC	331	static enum drm_connector_status detect_reg(struct hdmi *hdmi)
	332	{
	333	uint32_t hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);
	334	return (hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED) ?
	335	connector_status_connected : connector_status_disconnected;
	336	}
	337
	338	static enum drm_connector_status detect_gpio(struct hdmi *hdmi)
	339	{
	340	const struct hdmi_platform_config *config = hdmi->config;
	341	return gpio_get_value(config->hpd_gpio) ?
	342	connector_status_connected :
	343	connector_status_disconnected;
	344	}
	345
c8afe684 RC	346	static enum drm_connector_status hdmi_connector_detect(
	347	struct drm_connector *connector, bool force)
	348	{
a3376e3e RC	349	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
a3376e3e RC	350	struct hdmi *hdmi = hdmi_connector->hdmi;
3189650d	351	enum drm_connector_status stat_gpio, stat_reg;
c8afe684 RC	352	int retry = 20;
c8afe684 RC	353
3189650d RC	354	do {
	355	stat_gpio = detect_gpio(hdmi);
	356	stat_reg = detect_reg(hdmi);
c8afe684	357
3189650d	358	if (stat_gpio == stat_reg)
dada25bd	359	break;
3189650d	360
c8afe684	361	mdelay(10);
3189650d RC	362	} while (--retry);
	363
	364	/* the status we get from reading gpio seems to be more reliable,
	365	* so trust that one the most if we didn't manage to get hdmi and
	366	* gpio status to agree:
	367	*/
	368	if (stat_gpio != stat_reg) {
	369	DBG("HDMI_HPD_INT_STATUS tells us: %d", stat_reg);
	370	DBG("hpd gpio tells us: %d", stat_gpio);
c8afe684 RC	371	}
c8afe684 RC	372
3189650d	373	return stat_gpio;
c8afe684 RC	374	}
	375
	376	static void hdmi_connector_destroy(struct drm_connector *connector)
	377	{
a3376e3e	378	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
c8afe684 RC	379
	380	hdp_disable(hdmi_connector);
	381
34ea3d38	382	drm_connector_unregister(connector);
c8afe684 RC	383	drm_connector_cleanup(connector);
c8afe684 RC	384
c8afe684 RC	385	kfree(hdmi_connector);
	386	}
	387
	388	static int hdmi_connector_get_modes(struct drm_connector *connector)
	389	{
a3376e3e RC	390	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
a3376e3e RC	391	struct hdmi *hdmi = hdmi_connector->hdmi;
c8afe684 RC	392	struct edid *edid;
	393	uint32_t hdmi_ctrl;
	394	int ret = 0;
	395
	396	hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL);
	397	hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl \| HDMI_CTRL_ENABLE);
	398
	399	edid = drm_get_edid(connector, hdmi->i2c);
	400
	401	hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl);
	402
c6a57a50	403	hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid);
c8afe684 RC	404	drm_mode_connector_update_edid_property(connector, edid);
	405
	406	if (edid) {
	407	ret = drm_add_edid_modes(connector, edid);
	408	kfree(edid);
	409	}
	410
	411	return ret;
	412	}
	413
	414	static int hdmi_connector_mode_valid(struct drm_connector *connector,
	415	struct drm_display_mode *mode)
	416	{
a3376e3e	417	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
dada25bd RC	418	struct hdmi *hdmi = hdmi_connector->hdmi;
dada25bd RC	419	const struct hdmi_platform_config *config = hdmi->config;
c8afe684 RC	420	struct msm_drm_private *priv = connector->dev->dev_private;
	421	struct msm_kms *kms = priv->kms;
	422	long actual, requested;
	423
	424	requested = 1000 * mode->clock;
	425	actual = kms->funcs->round_pixclk(kms,
a3376e3e	426	requested, hdmi_connector->hdmi->encoder);
c8afe684	427
dada25bd RC	428	/* for mdp5/apq8074, we manage our own pixel clk (as opposed to
	429	* mdp4/dtv stuff where pixel clk is assigned to mdp/encoder
	430	* instead):
	431	*/
	432	if (config->pwr_clk_cnt > 0)
	433	actual = clk_round_rate(hdmi->pwr_clks[0], actual);
	434
c8afe684 RC	435	DBG("requested=%ld, actual=%ld", requested, actual);
	436
	437	if (actual != requested)
	438	return MODE_CLOCK_RANGE;
	439
	440	return 0;
	441	}
	442
a3376e3e RC	443	static struct drm_encoder *
	444	hdmi_connector_best_encoder(struct drm_connector *connector)
	445	{
	446	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
	447	return hdmi_connector->hdmi->encoder;
	448	}
	449
c8afe684	450	static const struct drm_connector_funcs hdmi_connector_funcs = {
0b776d45	451	.dpms = drm_atomic_helper_connector_dpms,
c8afe684 RC	452	.detect = hdmi_connector_detect,
	453	.fill_modes = drm_helper_probe_single_connector_modes,
	454	.destroy = hdmi_connector_destroy,
3e7849ef RC	455	.reset = drm_atomic_helper_connector_reset,
	456	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
	457	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
c8afe684 RC	458	};
	459
	460	static const struct drm_connector_helper_funcs hdmi_connector_helper_funcs = {
	461	.get_modes = hdmi_connector_get_modes,
	462	.mode_valid = hdmi_connector_mode_valid,
a3376e3e	463	.best_encoder = hdmi_connector_best_encoder,
c8afe684 RC	464	};
	465
	466	/* initialize connector */
a3376e3e	467	struct drm_connector hdmi_connector_init(struct hdmi hdmi)
c8afe684 RC	468	{
	469	struct drm_connector *connector = NULL;
	470	struct hdmi_connector *hdmi_connector;
	471	int ret;
	472
	473	hdmi_connector = kzalloc(sizeof(*hdmi_connector), GFP_KERNEL);
	474	if (!hdmi_connector) {
	475	ret = -ENOMEM;
	476	goto fail;
	477	}
	478
d1a717bd	479	hdmi_connector->hdmi = hdmi;
dada25bd	480	INIT_WORK(&hdmi_connector->hpd_work, hotplug_work);
a3376e3e RC	481
a3376e3e RC	482	connector = &hdmi_connector->base;
c8afe684	483
a3376e3e	484	drm_connector_init(hdmi->dev, connector, &hdmi_connector_funcs,
c8afe684 RC	485	DRM_MODE_CONNECTOR_HDMIA);
	486	drm_connector_helper_add(connector, &hdmi_connector_helper_funcs);
	487
3189650d RC	488	connector->polled = DRM_CONNECTOR_POLL_CONNECT \|
3189650d RC	489	DRM_CONNECTOR_POLL_DISCONNECT;
c8afe684	490
cddfaebd	491	connector->interlace_allowed = 0;
c8afe684 RC	492	connector->doublescan_allowed = 0;
c8afe684 RC	493
34ea3d38	494	drm_connector_register(connector);
c8afe684	495
c8afe684 RC	496	ret = hpd_enable(hdmi_connector);
c8afe684 RC	497	if (ret) {
5e4eb82f	498	dev_err(&hdmi->pdev->dev, "failed to enable HPD: %d\n", ret);
c8afe684 RC	499	goto fail;
	500	}
	501
a3376e3e	502	drm_mode_connector_attach_encoder(connector, hdmi->encoder);
c8afe684 RC	503
	504	return connector;
	505
	506	fail:
	507	if (connector)
	508	hdmi_connector_destroy(connector);
	509
	510	return ERR_PTR(ret);
	511	}