[deliverable/linux.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 "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 int gpio_config(struct hdmi *hdmi, bool on)
{
	struct drm_device *dev = hdmi->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->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->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->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->dev, "'%s'(%d) gpio_request failed: %d\n",
					"HDMI_MUX_SEL", 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->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);
		}
		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);
		}
		DBG("gpio off");
	}

	return 0;

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 drm_device *dev = hdmi_connector->base.dev;
	struct hdmi_phy *phy = hdmi->phy;
	uint32_t hpd_ctrl;
	int i, ret;

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

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

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

	hdmi_set_mode(hdmi, false);
	phy->funcs->reset(phy);
	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 */
	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);

	return 0;

fail:
	return ret;
}

static int hdp_disable(struct hdmi_connector *hdmi_connector)
{
	struct hdmi *hdmi = hdmi_connector->hdmi;
	const struct hdmi_platform_config *config = hdmi->config;
	struct drm_device *dev = hdmi_connector->base.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_reg_cnt; i++) {
		ret = regulator_disable(hdmi->hpd_regs[i]);
		if (ret) {
			dev_err(dev->dev, "failed to disable hpd regulator: %s (%d)\n",
					config->hpd_reg_names[i], ret);
			goto fail;
		}
	}

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

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

	return 0;

fail:
	return 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 msm_drm_private *priv = connector->dev->dev_private;
	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);

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

		/* ack the irq: */
		hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL,
				hpd_int_ctrl | HDMI_HPD_INT_CTRL_INT_ACK);

		/* 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(priv->wq, &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);

	hdmi_unreference(hdmi_connector->hdmi);

	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);

	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_helper_connector_dpms,
	.detect = hdmi_connector_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.destroy = hdmi_connector_destroy,
};

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_reference(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 = 1;
	connector->doublescan_allowed = 0;

	drm_connector_register(connector);

	ret = hpd_enable(hdmi_connector);
	if (ret) {
		dev_err(hdmi->dev->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>
	19
dd2da6e3	20	#include "msm_kms.h"
c8afe684 RC	21	#include "hdmi.h"
	22
	23	struct hdmi_connector {
a3376e3e RC	24	struct drm_connector base;
a3376e3e RC	25	struct hdmi *hdmi;
dada25bd	26	struct work_struct hpd_work;
c8afe684 RC	27	};
	28	#define to_hdmi_connector(x) container_of(x, struct hdmi_connector, base)
	29
	30	static int gpio_config(struct hdmi *hdmi, bool on)
	31	{
	32	struct drm_device *dev = hdmi->dev;
dada25bd	33	const struct hdmi_platform_config *config = hdmi->config;
c8afe684 RC	34	int ret;
	35
	36	if (on) {
	37	ret = gpio_request(config->ddc_clk_gpio, "HDMI_DDC_CLK");
	38	if (ret) {
	39	dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n",
	40	"HDMI_DDC_CLK", config->ddc_clk_gpio, ret);
	41	goto error1;
	42	}
dada25bd RC	43	gpio_set_value_cansleep(config->ddc_clk_gpio, 1);
dada25bd RC	44
c8afe684 RC	45	ret = gpio_request(config->ddc_data_gpio, "HDMI_DDC_DATA");
	46	if (ret) {
	47	dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n",
	48	"HDMI_DDC_DATA", config->ddc_data_gpio, ret);
	49	goto error2;
	50	}
dada25bd RC	51	gpio_set_value_cansleep(config->ddc_data_gpio, 1);
dada25bd RC	52
c8afe684 RC	53	ret = gpio_request(config->hpd_gpio, "HDMI_HPD");
	54	if (ret) {
	55	dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n",
	56	"HDMI_HPD", config->hpd_gpio, ret);
	57	goto error3;
	58	}
dada25bd RC	59	gpio_direction_input(config->hpd_gpio);
	60	gpio_set_value_cansleep(config->hpd_gpio, 1);
	61
	62	if (config->mux_en_gpio != -1) {
	63	ret = gpio_request(config->mux_en_gpio, "HDMI_MUX_EN");
c8afe684 RC	64	if (ret) {
c8afe684 RC	65	dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n",
dada25bd	66	"HDMI_MUX_SEL", config->mux_en_gpio, ret);
c8afe684 RC	67	goto error4;
c8afe684 RC	68	}
dada25bd RC	69	gpio_set_value_cansleep(config->mux_en_gpio, 1);
	70	}
	71
	72	if (config->mux_sel_gpio != -1) {
	73	ret = gpio_request(config->mux_sel_gpio, "HDMI_MUX_SEL");
	74	if (ret) {
	75	dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n",
	76	"HDMI_MUX_SEL", config->mux_sel_gpio, ret);
	77	goto error5;
	78	}
	79	gpio_set_value_cansleep(config->mux_sel_gpio, 0);
c8afe684 RC	80	}
	81	DBG("gpio on");
	82	} else {
	83	gpio_free(config->ddc_clk_gpio);
	84	gpio_free(config->ddc_data_gpio);
	85	gpio_free(config->hpd_gpio);
	86
dada25bd RC	87	if (config->mux_en_gpio != -1) {
	88	gpio_set_value_cansleep(config->mux_en_gpio, 0);
	89	gpio_free(config->mux_en_gpio);
	90	}
	91
	92	if (config->mux_sel_gpio != -1) {
	93	gpio_set_value_cansleep(config->mux_sel_gpio, 1);
	94	gpio_free(config->mux_sel_gpio);
c8afe684 RC	95	}
	96	DBG("gpio off");
	97	}
	98
	99	return 0;
	100
dada25bd RC	101	error5:
	102	if (config->mux_en_gpio != -1)
	103	gpio_free(config->mux_en_gpio);
c8afe684 RC	104	error4:
	105	gpio_free(config->hpd_gpio);
	106	error3:
	107	gpio_free(config->ddc_data_gpio);
	108	error2:
	109	gpio_free(config->ddc_clk_gpio);
	110	error1:
	111	return ret;
	112	}
	113
	114	static int hpd_enable(struct hdmi_connector *hdmi_connector)
	115	{
a3376e3e	116	struct hdmi *hdmi = hdmi_connector->hdmi;
dada25bd	117	const struct hdmi_platform_config *config = hdmi->config;
a3376e3e	118	struct drm_device *dev = hdmi_connector->base.dev;
c8afe684 RC	119	struct hdmi_phy *phy = hdmi->phy;
c8afe684 RC	120	uint32_t hpd_ctrl;
dada25bd	121	int i, ret;
c8afe684 RC	122
	123	ret = gpio_config(hdmi, true);
	124	if (ret) {
	125	dev_err(dev->dev, "failed to configure GPIOs: %d\n", ret);
	126	goto fail;
	127	}
	128
dada25bd RC	129	for (i = 0; i < config->hpd_clk_cnt; i++) {
	130	ret = clk_prepare_enable(hdmi->hpd_clks[i]);
	131	if (ret) {
	132	dev_err(dev->dev, "failed to enable hpd clk: %s (%d)\n",
	133	config->hpd_clk_names[i], ret);
	134	goto fail;
	135	}
c8afe684 RC	136	}
c8afe684 RC	137
dada25bd RC	138	for (i = 0; i < config->hpd_reg_cnt; i++) {
	139	ret = regulator_enable(hdmi->hpd_regs[i]);
	140	if (ret) {
	141	dev_err(dev->dev, "failed to enable hpd regulator: %s (%d)\n",
	142	config->hpd_reg_names[i], ret);
	143	goto fail;
	144	}
c8afe684 RC	145	}
	146
	147	hdmi_set_mode(hdmi, false);
	148	phy->funcs->reset(phy);
	149	hdmi_set_mode(hdmi, true);
	150
	151	hdmi_write(hdmi, REG_HDMI_USEC_REFTIMER, 0x0001001b);
	152
	153	/* enable HPD events: */
	154	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL,
	155	HDMI_HPD_INT_CTRL_INT_CONNECT \|
	156	HDMI_HPD_INT_CTRL_INT_EN);
	157
	158	/* set timeout to 4.1ms (max) for hardware debounce */
	159	hpd_ctrl = hdmi_read(hdmi, REG_HDMI_HPD_CTRL);
	160	hpd_ctrl \|= HDMI_HPD_CTRL_TIMEOUT(0x1fff);
	161
	162	/* Toggle HPD circuit to trigger HPD sense */
	163	hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
	164	~HDMI_HPD_CTRL_ENABLE & hpd_ctrl);
	165	hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
	166	HDMI_HPD_CTRL_ENABLE \| hpd_ctrl);
	167
	168	return 0;
	169
	170	fail:
	171	return ret;
	172	}
	173
	174	static int hdp_disable(struct hdmi_connector *hdmi_connector)
	175	{
a3376e3e	176	struct hdmi *hdmi = hdmi_connector->hdmi;
dada25bd	177	const struct hdmi_platform_config *config = hdmi->config;
a3376e3e	178	struct drm_device *dev = hdmi_connector->base.dev;
dada25bd	179	int i, ret = 0;
c8afe684 RC	180
	181	/* Disable HPD interrupt */
	182	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, 0);
	183
	184	hdmi_set_mode(hdmi, false);
	185
dada25bd RC	186	for (i = 0; i < config->hpd_reg_cnt; i++) {
	187	ret = regulator_disable(hdmi->hpd_regs[i]);
	188	if (ret) {
	189	dev_err(dev->dev, "failed to disable hpd regulator: %s (%d)\n",
	190	config->hpd_reg_names[i], ret);
	191	goto fail;
	192	}
c8afe684 RC	193	}
c8afe684 RC	194
dada25bd RC	195	for (i = 0; i < config->hpd_clk_cnt; i++)
dada25bd RC	196	clk_disable_unprepare(hdmi->hpd_clks[i]);
c8afe684 RC	197
	198	ret = gpio_config(hdmi, false);
	199	if (ret) {
	200	dev_err(dev->dev, "failed to unconfigure GPIOs: %d\n", ret);
	201	goto fail;
	202	}
	203
	204	return 0;
	205
	206	fail:
	207	return ret;
	208	}
	209
dada25bd RC	210	static void
	211	hotplug_work(struct work_struct *work)
	212	{
	213	struct hdmi_connector *hdmi_connector =
	214	container_of(work, struct hdmi_connector, hpd_work);
	215	struct drm_connector *connector = &hdmi_connector->base;
	216	drm_helper_hpd_irq_event(connector->dev);
	217	}
	218
c8afe684 RC	219	void hdmi_connector_irq(struct drm_connector *connector)
c8afe684 RC	220	{
a3376e3e	221	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
dada25bd	222	struct msm_drm_private *priv = connector->dev->dev_private;
a3376e3e	223	struct hdmi *hdmi = hdmi_connector->hdmi;
c8afe684 RC	224	uint32_t hpd_int_status, hpd_int_ctrl;
	225
	226	/* Process HPD: */
	227	hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);
	228	hpd_int_ctrl = hdmi_read(hdmi, REG_HDMI_HPD_INT_CTRL);
	229
	230	if ((hpd_int_ctrl & HDMI_HPD_INT_CTRL_INT_EN) &&
	231	(hpd_int_status & HDMI_HPD_INT_STATUS_INT)) {
	232	bool detected = !!(hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED);
	233
	234	DBG("status=%04x, ctrl=%04x", hpd_int_status, hpd_int_ctrl);
	235
	236	/* ack the irq: */
	237	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL,
	238	hpd_int_ctrl \| HDMI_HPD_INT_CTRL_INT_ACK);
	239
c8afe684 RC	240	/* detect disconnect if we are connected or visa versa: */
	241	hpd_int_ctrl = HDMI_HPD_INT_CTRL_INT_EN;
	242	if (!detected)
	243	hpd_int_ctrl \|= HDMI_HPD_INT_CTRL_INT_CONNECT;
	244	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, hpd_int_ctrl);
dada25bd RC	245
dada25bd RC	246	queue_work(priv->wq, &hdmi_connector->hpd_work);
c8afe684 RC	247	}
	248	}
	249
3189650d RC	250	static enum drm_connector_status detect_reg(struct hdmi *hdmi)
	251	{
	252	uint32_t hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);
	253	return (hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED) ?
	254	connector_status_connected : connector_status_disconnected;
	255	}
	256
	257	static enum drm_connector_status detect_gpio(struct hdmi *hdmi)
	258	{
	259	const struct hdmi_platform_config *config = hdmi->config;
	260	return gpio_get_value(config->hpd_gpio) ?
	261	connector_status_connected :
	262	connector_status_disconnected;
	263	}
	264
c8afe684 RC	265	static enum drm_connector_status hdmi_connector_detect(
	266	struct drm_connector *connector, bool force)
	267	{
a3376e3e RC	268	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
a3376e3e RC	269	struct hdmi *hdmi = hdmi_connector->hdmi;
3189650d	270	enum drm_connector_status stat_gpio, stat_reg;
c8afe684 RC	271	int retry = 20;
c8afe684 RC	272
3189650d RC	273	do {
	274	stat_gpio = detect_gpio(hdmi);
	275	stat_reg = detect_reg(hdmi);
c8afe684	276
3189650d	277	if (stat_gpio == stat_reg)
dada25bd	278	break;
3189650d	279
c8afe684	280	mdelay(10);
3189650d RC	281	} while (--retry);
	282
	283	/* the status we get from reading gpio seems to be more reliable,
	284	* so trust that one the most if we didn't manage to get hdmi and
	285	* gpio status to agree:
	286	*/
	287	if (stat_gpio != stat_reg) {
	288	DBG("HDMI_HPD_INT_STATUS tells us: %d", stat_reg);
	289	DBG("hpd gpio tells us: %d", stat_gpio);
c8afe684 RC	290	}
c8afe684 RC	291
3189650d	292	return stat_gpio;
c8afe684 RC	293	}
	294
	295	static void hdmi_connector_destroy(struct drm_connector *connector)
	296	{
a3376e3e	297	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
c8afe684 RC	298
	299	hdp_disable(hdmi_connector);
	300
34ea3d38	301	drm_connector_unregister(connector);
c8afe684 RC	302	drm_connector_cleanup(connector);
c8afe684 RC	303
a3376e3e	304	hdmi_unreference(hdmi_connector->hdmi);
c8afe684 RC	305
	306	kfree(hdmi_connector);
	307	}
	308
	309	static int hdmi_connector_get_modes(struct drm_connector *connector)
	310	{
a3376e3e RC	311	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
a3376e3e RC	312	struct hdmi *hdmi = hdmi_connector->hdmi;
c8afe684 RC	313	struct edid *edid;
	314	uint32_t hdmi_ctrl;
	315	int ret = 0;
	316
	317	hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL);
	318	hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl \| HDMI_CTRL_ENABLE);
	319
	320	edid = drm_get_edid(connector, hdmi->i2c);
	321
	322	hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl);
	323
	324	drm_mode_connector_update_edid_property(connector, edid);
	325
	326	if (edid) {
	327	ret = drm_add_edid_modes(connector, edid);
	328	kfree(edid);
	329	}
	330
	331	return ret;
	332	}
	333
	334	static int hdmi_connector_mode_valid(struct drm_connector *connector,
	335	struct drm_display_mode *mode)
	336	{
a3376e3e	337	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
dada25bd RC	338	struct hdmi *hdmi = hdmi_connector->hdmi;
dada25bd RC	339	const struct hdmi_platform_config *config = hdmi->config;
c8afe684 RC	340	struct msm_drm_private *priv = connector->dev->dev_private;
	341	struct msm_kms *kms = priv->kms;
	342	long actual, requested;
	343
	344	requested = 1000 * mode->clock;
	345	actual = kms->funcs->round_pixclk(kms,
a3376e3e	346	requested, hdmi_connector->hdmi->encoder);
c8afe684	347
dada25bd RC	348	/* for mdp5/apq8074, we manage our own pixel clk (as opposed to
	349	* mdp4/dtv stuff where pixel clk is assigned to mdp/encoder
	350	* instead):
	351	*/
	352	if (config->pwr_clk_cnt > 0)
	353	actual = clk_round_rate(hdmi->pwr_clks[0], actual);
	354
c8afe684 RC	355	DBG("requested=%ld, actual=%ld", requested, actual);
	356
	357	if (actual != requested)
	358	return MODE_CLOCK_RANGE;
	359
	360	return 0;
	361	}
	362
a3376e3e RC	363	static struct drm_encoder *
	364	hdmi_connector_best_encoder(struct drm_connector *connector)
	365	{
	366	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
	367	return hdmi_connector->hdmi->encoder;
	368	}
	369
c8afe684 RC	370	static const struct drm_connector_funcs hdmi_connector_funcs = {
	371	.dpms = drm_helper_connector_dpms,
	372	.detect = hdmi_connector_detect,
	373	.fill_modes = drm_helper_probe_single_connector_modes,
	374	.destroy = hdmi_connector_destroy,
	375	};
	376
	377	static const struct drm_connector_helper_funcs hdmi_connector_helper_funcs = {
	378	.get_modes = hdmi_connector_get_modes,
	379	.mode_valid = hdmi_connector_mode_valid,
a3376e3e	380	.best_encoder = hdmi_connector_best_encoder,
c8afe684 RC	381	};
	382
	383	/* initialize connector */
a3376e3e	384	struct drm_connector hdmi_connector_init(struct hdmi hdmi)
c8afe684 RC	385	{
	386	struct drm_connector *connector = NULL;
	387	struct hdmi_connector *hdmi_connector;
	388	int ret;
	389
	390	hdmi_connector = kzalloc(sizeof(*hdmi_connector), GFP_KERNEL);
	391	if (!hdmi_connector) {
	392	ret = -ENOMEM;
	393	goto fail;
	394	}
	395
a3376e3e	396	hdmi_connector->hdmi = hdmi_reference(hdmi);
dada25bd	397	INIT_WORK(&hdmi_connector->hpd_work, hotplug_work);
a3376e3e RC	398
a3376e3e RC	399	connector = &hdmi_connector->base;
c8afe684	400
a3376e3e	401	drm_connector_init(hdmi->dev, connector, &hdmi_connector_funcs,
c8afe684 RC	402	DRM_MODE_CONNECTOR_HDMIA);
	403	drm_connector_helper_add(connector, &hdmi_connector_helper_funcs);
	404
3189650d RC	405	connector->polled = DRM_CONNECTOR_POLL_CONNECT \|
3189650d RC	406	DRM_CONNECTOR_POLL_DISCONNECT;
c8afe684 RC	407
	408	connector->interlace_allowed = 1;
	409	connector->doublescan_allowed = 0;
	410
34ea3d38	411	drm_connector_register(connector);
c8afe684	412
c8afe684 RC	413	ret = hpd_enable(hdmi_connector);
c8afe684 RC	414	if (ret) {
a3376e3e	415	dev_err(hdmi->dev->dev, "failed to enable HPD: %d\n", ret);
c8afe684 RC	416	goto fail;
	417	}
	418
a3376e3e	419	drm_mode_connector_attach_encoder(connector, hdmi->encoder);
c8afe684 RC	420
	421	return connector;
	422
	423	fail:
	424	if (connector)
	425	hdmi_connector_destroy(connector);
	426
	427	return ERR_PTR(ret);
	428	}