[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;
};
#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;
	struct hdmi_platform_config *config =
			hdmi->pdev->dev.platform_data;
	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;
		}
		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;
		}
		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;
		}
		if (config->pmic_gpio != -1) {
			ret = gpio_request(config->pmic_gpio, "PMIC_HDMI_MUX_SEL");
			if (ret) {
				dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n",
					"PMIC_HDMI_MUX_SEL", config->pmic_gpio, ret);
				goto error4;
			}
			gpio_set_value_cansleep(config->pmic_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->pmic_gpio != -1) {
			gpio_set_value_cansleep(config->pmic_gpio, 1);
			gpio_free(config->pmic_gpio);
		}
		DBG("gpio off");
	}

	return 0;

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

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

	ret = clk_prepare_enable(hdmi->clk);
	if (ret) {
		dev_err(dev->dev, "failed to enable 'clk': %d\n", ret);
		goto fail;
	}

	ret = clk_prepare_enable(hdmi->m_pclk);
	if (ret) {
		dev_err(dev->dev, "failed to enable 'm_pclk': %d\n", ret);
		goto fail;
	}

	ret = clk_prepare_enable(hdmi->s_pclk);
	if (ret) {
		dev_err(dev->dev, "failed to enable 's_pclk': %d\n", ret);
		goto fail;
	}

	if (hdmi->mpp0)
		ret = regulator_enable(hdmi->mpp0);
	if (!ret)
		ret = regulator_enable(hdmi->mvs);
	if (ret) {
		dev_err(dev->dev, "failed to enable regulators: %d\n", 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;
	struct drm_device *dev = hdmi_connector->base.dev;
	int ret = 0;

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

	hdmi_set_mode(hdmi, false);

	if (hdmi->mpp0)
		ret = regulator_disable(hdmi->mpp0);
	if (!ret)
		ret = regulator_disable(hdmi->mvs);
	if (ret) {
		dev_err(dev->dev, "failed to enable regulators: %d\n", ret);
		goto fail;
	}

	clk_disable_unprepare(hdmi->clk);
	clk_disable_unprepare(hdmi->m_pclk);
	clk_disable_unprepare(hdmi->s_pclk);

	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;
}

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);

		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);

		drm_helper_hpd_irq_event(connector->dev);

		/* 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);
	}
}

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;
	uint32_t hpd_int_status;
	int retry = 20;

	hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);

	/* sense seems to in some cases be momentarily de-asserted, don't
	 * let that trick us into thinking the monitor is gone:
	 */
	while (retry-- && !(hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED)) {
		mdelay(10);
		hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);
		DBG("status=%08x", hpd_int_status);
	}

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

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

	hdp_disable(hdmi_connector);

	drm_sysfs_connector_remove(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 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);

	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);

	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_HPD;

	connector->interlace_allowed = 1;
	connector->doublescan_allowed = 0;

	drm_sysfs_connector_add(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;
c8afe684 RC	26	};
	27	#define to_hdmi_connector(x) container_of(x, struct hdmi_connector, base)
	28
	29	static int gpio_config(struct hdmi *hdmi, bool on)
	30	{
	31	struct drm_device *dev = hdmi->dev;
	32	struct hdmi_platform_config *config =
	33	hdmi->pdev->dev.platform_data;
	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	}
	43	ret = gpio_request(config->ddc_data_gpio, "HDMI_DDC_DATA");
	44	if (ret) {
	45	dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n",
	46	"HDMI_DDC_DATA", config->ddc_data_gpio, ret);
	47	goto error2;
	48	}
	49	ret = gpio_request(config->hpd_gpio, "HDMI_HPD");
	50	if (ret) {
	51	dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n",
	52	"HDMI_HPD", config->hpd_gpio, ret);
	53	goto error3;
	54	}
	55	if (config->pmic_gpio != -1) {
	56	ret = gpio_request(config->pmic_gpio, "PMIC_HDMI_MUX_SEL");
	57	if (ret) {
	58	dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n",
	59	"PMIC_HDMI_MUX_SEL", config->pmic_gpio, ret);
	60	goto error4;
	61	}
	62	gpio_set_value_cansleep(config->pmic_gpio, 0);
	63	}
	64	DBG("gpio on");
	65	} else {
	66	gpio_free(config->ddc_clk_gpio);
	67	gpio_free(config->ddc_data_gpio);
	68	gpio_free(config->hpd_gpio);
	69
	70	if (config->pmic_gpio != -1) {
	71	gpio_set_value_cansleep(config->pmic_gpio, 1);
	72	gpio_free(config->pmic_gpio);
	73	}
	74	DBG("gpio off");
	75	}
	76
	77	return 0;
	78
	79	error4:
	80	gpio_free(config->hpd_gpio);
	81	error3:
	82	gpio_free(config->ddc_data_gpio);
	83	error2:
	84	gpio_free(config->ddc_clk_gpio);
	85	error1:
	86	return ret;
	87	}
	88
	89	static int hpd_enable(struct hdmi_connector *hdmi_connector)
90	{
a3376e3e RC	91	struct hdmi *hdmi = hdmi_connector->hdmi;
a3376e3e RC	92	struct drm_device *dev = hdmi_connector->base.dev;
c8afe684 RC	93	struct hdmi_phy *phy = hdmi->phy;
	94	uint32_t hpd_ctrl;
	95	int ret;
	96
	97	ret = gpio_config(hdmi, true);
	98	if (ret) {
	99	dev_err(dev->dev, "failed to configure GPIOs: %d\n", ret);
	100	goto fail;
	101	}
	102
	103	ret = clk_prepare_enable(hdmi->clk);
	104	if (ret) {
	105	dev_err(dev->dev, "failed to enable 'clk': %d\n", ret);
	106	goto fail;
	107	}
	108
	109	ret = clk_prepare_enable(hdmi->m_pclk);
	110	if (ret) {
	111	dev_err(dev->dev, "failed to enable 'm_pclk': %d\n", ret);
	112	goto fail;
	113	}
	114
	115	ret = clk_prepare_enable(hdmi->s_pclk);
	116	if (ret) {
	117	dev_err(dev->dev, "failed to enable 's_pclk': %d\n", ret);
	118	goto fail;
	119	}
	120
	121	if (hdmi->mpp0)
	122	ret = regulator_enable(hdmi->mpp0);
	123	if (!ret)
	124	ret = regulator_enable(hdmi->mvs);
	125	if (ret) {
	126	dev_err(dev->dev, "failed to enable regulators: %d\n", ret);
	127	goto fail;
	128	}
	129
	130	hdmi_set_mode(hdmi, false);
	131	phy->funcs->reset(phy);
	132	hdmi_set_mode(hdmi, true);
	133
	134	hdmi_write(hdmi, REG_HDMI_USEC_REFTIMER, 0x0001001b);
	135
	136	/* enable HPD events: */
	137	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL,
	138	HDMI_HPD_INT_CTRL_INT_CONNECT \|
	139	HDMI_HPD_INT_CTRL_INT_EN);
	140
	141	/* set timeout to 4.1ms (max) for hardware debounce */
	142	hpd_ctrl = hdmi_read(hdmi, REG_HDMI_HPD_CTRL);
	143	hpd_ctrl \|= HDMI_HPD_CTRL_TIMEOUT(0x1fff);
	144
	145	/* Toggle HPD circuit to trigger HPD sense */
	146	hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
	147	~HDMI_HPD_CTRL_ENABLE & hpd_ctrl);
	148	hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
	149	HDMI_HPD_CTRL_ENABLE \| hpd_ctrl);
	150
	151	return 0;
	152
	153	fail:
	154	return ret;
	155	}
	156
157	static int hdp_disable(struct hdmi_connector *hdmi_connector)
158	{
a3376e3e RC	159	struct hdmi *hdmi = hdmi_connector->hdmi;
a3376e3e RC	160	struct drm_device *dev = hdmi_connector->base.dev;
c8afe684 RC	161	int ret = 0;
	162
	163	/* Disable HPD interrupt */
	164	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, 0);
	165
	166	hdmi_set_mode(hdmi, false);
	167
	168	if (hdmi->mpp0)
	169	ret = regulator_disable(hdmi->mpp0);
	170	if (!ret)
	171	ret = regulator_disable(hdmi->mvs);
	172	if (ret) {
	173	dev_err(dev->dev, "failed to enable regulators: %d\n", ret);
	174	goto fail;
	175	}
	176
	177	clk_disable_unprepare(hdmi->clk);
	178	clk_disable_unprepare(hdmi->m_pclk);
	179	clk_disable_unprepare(hdmi->s_pclk);
	180
	181	ret = gpio_config(hdmi, false);
	182	if (ret) {
	183	dev_err(dev->dev, "failed to unconfigure GPIOs: %d\n", ret);
	184	goto fail;
	185	}
	186
	187	return 0;
	188
	189	fail:
	190	return ret;
	191	}
	192
	193	void hdmi_connector_irq(struct drm_connector *connector)
	194	{
a3376e3e RC	195	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
a3376e3e RC	196	struct hdmi *hdmi = hdmi_connector->hdmi;
c8afe684 RC	197	uint32_t hpd_int_status, hpd_int_ctrl;
	198
	199	/* Process HPD: */
	200	hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);
	201	hpd_int_ctrl = hdmi_read(hdmi, REG_HDMI_HPD_INT_CTRL);
	202
	203	if ((hpd_int_ctrl & HDMI_HPD_INT_CTRL_INT_EN) &&
	204	(hpd_int_status & HDMI_HPD_INT_STATUS_INT)) {
	205	bool detected = !!(hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED);
	206
	207	DBG("status=%04x, ctrl=%04x", hpd_int_status, hpd_int_ctrl);
	208
	209	/* ack the irq: */
	210	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL,
	211	hpd_int_ctrl \| HDMI_HPD_INT_CTRL_INT_ACK);
	212
	213	drm_helper_hpd_irq_event(connector->dev);
	214
	215	/* detect disconnect if we are connected or visa versa: */
	216	hpd_int_ctrl = HDMI_HPD_INT_CTRL_INT_EN;
	217	if (!detected)
	218	hpd_int_ctrl \|= HDMI_HPD_INT_CTRL_INT_CONNECT;
	219	hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, hpd_int_ctrl);
	220	}
	221	}
	222
	223	static enum drm_connector_status hdmi_connector_detect(
	224	struct drm_connector *connector, bool force)
	225	{
a3376e3e RC	226	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
a3376e3e RC	227	struct hdmi *hdmi = hdmi_connector->hdmi;
c8afe684 RC	228	uint32_t hpd_int_status;
	229	int retry = 20;
	230
	231	hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);
	232
	233	/* sense seems to in some cases be momentarily de-asserted, don't
	234	* let that trick us into thinking the monitor is gone:
	235	*/
	236	while (retry-- && !(hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED)) {
	237	mdelay(10);
	238	hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);
	239	DBG("status=%08x", hpd_int_status);
	240	}
	241
	242	return (hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED) ?
	243	connector_status_connected : connector_status_disconnected;
	244	}
	245
	246	static void hdmi_connector_destroy(struct drm_connector *connector)
	247	{
a3376e3e	248	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
c8afe684 RC	249
	250	hdp_disable(hdmi_connector);
	251
	252	drm_sysfs_connector_remove(connector);
	253	drm_connector_cleanup(connector);
	254
a3376e3e	255	hdmi_unreference(hdmi_connector->hdmi);
c8afe684 RC	256
	257	kfree(hdmi_connector);
	258	}
	259
	260	static int hdmi_connector_get_modes(struct drm_connector *connector)
	261	{
a3376e3e RC	262	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
a3376e3e RC	263	struct hdmi *hdmi = hdmi_connector->hdmi;
c8afe684 RC	264	struct edid *edid;
	265	uint32_t hdmi_ctrl;
	266	int ret = 0;
	267
	268	hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL);
	269	hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl \| HDMI_CTRL_ENABLE);
	270
	271	edid = drm_get_edid(connector, hdmi->i2c);
	272
	273	hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl);
	274
	275	drm_mode_connector_update_edid_property(connector, edid);
	276
	277	if (edid) {
	278	ret = drm_add_edid_modes(connector, edid);
	279	kfree(edid);
	280	}
	281
	282	return ret;
	283	}
	284
	285	static int hdmi_connector_mode_valid(struct drm_connector *connector,
	286	struct drm_display_mode *mode)
	287	{
a3376e3e	288	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
c8afe684 RC	289	struct msm_drm_private *priv = connector->dev->dev_private;
	290	struct msm_kms *kms = priv->kms;
	291	long actual, requested;
	292
	293	requested = 1000 * mode->clock;
	294	actual = kms->funcs->round_pixclk(kms,
a3376e3e	295	requested, hdmi_connector->hdmi->encoder);
c8afe684 RC	296
	297	DBG("requested=%ld, actual=%ld", requested, actual);
	298
	299	if (actual != requested)
	300	return MODE_CLOCK_RANGE;
	301
	302	return 0;
	303	}
	304
a3376e3e RC	305	static struct drm_encoder *
	306	hdmi_connector_best_encoder(struct drm_connector *connector)
	307	{
	308	struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
	309	return hdmi_connector->hdmi->encoder;
	310	}
	311
c8afe684 RC	312	static const struct drm_connector_funcs hdmi_connector_funcs = {
	313	.dpms = drm_helper_connector_dpms,
	314	.detect = hdmi_connector_detect,
	315	.fill_modes = drm_helper_probe_single_connector_modes,
	316	.destroy = hdmi_connector_destroy,
	317	};
	318
	319	static const struct drm_connector_helper_funcs hdmi_connector_helper_funcs = {
	320	.get_modes = hdmi_connector_get_modes,
	321	.mode_valid = hdmi_connector_mode_valid,
a3376e3e	322	.best_encoder = hdmi_connector_best_encoder,
c8afe684 RC	323	};
	324
	325	/* initialize connector */
a3376e3e	326	struct drm_connector hdmi_connector_init(struct hdmi hdmi)
c8afe684 RC	327	{
	328	struct drm_connector *connector = NULL;
	329	struct hdmi_connector *hdmi_connector;
	330	int ret;
	331
	332	hdmi_connector = kzalloc(sizeof(*hdmi_connector), GFP_KERNEL);
	333	if (!hdmi_connector) {
	334	ret = -ENOMEM;
	335	goto fail;
	336	}
	337
a3376e3e RC	338	hdmi_connector->hdmi = hdmi_reference(hdmi);
	339
	340	connector = &hdmi_connector->base;
c8afe684	341
a3376e3e	342	drm_connector_init(hdmi->dev, connector, &hdmi_connector_funcs,
c8afe684 RC	343	DRM_MODE_CONNECTOR_HDMIA);
	344	drm_connector_helper_add(connector, &hdmi_connector_helper_funcs);
	345
	346	connector->polled = DRM_CONNECTOR_POLL_HPD;
	347
	348	connector->interlace_allowed = 1;
	349	connector->doublescan_allowed = 0;
	350
	351	drm_sysfs_connector_add(connector);
	352
c8afe684 RC	353	ret = hpd_enable(hdmi_connector);
c8afe684 RC	354	if (ret) {
a3376e3e	355	dev_err(hdmi->dev->dev, "failed to enable HPD: %d\n", ret);
c8afe684 RC	356	goto fail;
	357	}
	358
a3376e3e	359	drm_mode_connector_attach_encoder(connector, hdmi->encoder);
c8afe684 RC	360
	361	return connector;
	362
	363	fail:
	364	if (connector)
	365	hdmi_connector_destroy(connector);
	366
	367	return ERR_PTR(ret);
	368	}