path: root/drivers/video/omap2/dss/hdmi.c

/*
 * hdmi.c
 *
 * HDMI interface DSS driver setting for TI's OMAP4 family of processor.
 * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com/
 * Authors: Yong Zhi
 *	Mythri pk <mythripk@ti.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/>.
 */

#define DSS_SUBSYS_NAME "HDMI"

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/clk.h>
#include <linux/gpio.h>
#include <linux/regulator/consumer.h>
#include <video/omapdss.h>

#include "ti_hdmi.h"
#include "dss.h"
#include "dss_features.h"

#define HDMI_WP			0x0
#define HDMI_CORE_SYS		0x400
#define HDMI_CORE_AV		0x900
#define HDMI_PLLCTRL		0x200
#define HDMI_PHY		0x300

/* HDMI EDID Length move this */
#define HDMI_EDID_MAX_LENGTH			256
#define EDID_TIMING_DESCRIPTOR_SIZE		0x12
#define EDID_DESCRIPTOR_BLOCK0_ADDRESS		0x36
#define EDID_DESCRIPTOR_BLOCK1_ADDRESS		0x80
#define EDID_SIZE_BLOCK0_TIMING_DESCRIPTOR	4
#define EDID_SIZE_BLOCK1_TIMING_DESCRIPTOR	4

#define HDMI_DEFAULT_REGN 16
#define HDMI_DEFAULT_REGM2 1

static struct {
	struct mutex lock;
	struct platform_device *pdev;

	struct hdmi_ip_data ip_data;

	struct clk *sys_clk;
	struct regulator *vdda_hdmi_dac_reg;

	int ct_cp_hpd_gpio;
	int ls_oe_gpio;
	int hpd_gpio;

	struct omap_dss_output output;
} hdmi;

/*
 * Logic for the below structure :
 * user enters the CEA or VESA timings by specifying the HDMI/DVI code.
 * There is a correspondence between CEA/VESA timing and code, please
 * refer to section 6.3 in HDMI 1.3 specification for timing code.
 *
 * In the below structure, cea_vesa_timings corresponds to all OMAP4
 * supported CEA and VESA timing values.code_cea corresponds to the CEA
 * code, It is used to get the timing from cea_vesa_timing array.Similarly
 * with code_vesa. Code_index is used for back mapping, that is once EDID
 * is read from the TV, EDID is parsed to find the timing values and then
 * map it to corresponding CEA or VESA index.
 */

static const struct hdmi_config cea_timings[] = {
	{
		{ 640, 480, 25200, 96, 16, 48, 2, 10, 33,
			OMAPDSS_SIG_ACTIVE_LOW, OMAPDSS_SIG_ACTIVE_LOW,
			false, },
		{ 1, HDMI_HDMI },
	},
	{
		{ 720, 480, 27027, 62, 16, 60, 6, 9, 30,
			OMAPDSS_SIG_ACTIVE_LOW, OMAPDSS_SIG_ACTIVE_LOW,
			false, },
		{ 2, HDMI_HDMI },
	},
	{
		{ 1280, 720, 74250, 40, 110, 220, 5, 5, 20,
			OMAPDSS_SIG_ACTIVE_HIGH, OMAPDSS_SIG_ACTIVE_HIGH,
			false, },
		{ 4, HDMI_HDMI },
	},
	{
		{ 1920, 540, 74250, 44, 88, 148, 5, 2, 15,
			OMAPDSS_SIG_ACTIVE_HIGH, OMAPDSS_SIG_ACTIVE_HIGH,
			true, },
		{ 5, HDMI_HDMI },
	},
	{
		{ 1440, 240, 27027, 124, 38, 114, 3, 4, 15,
			OMAPDSS_SIG_ACTIVE_LOW, OMAPDSS_SIG_ACTIVE_LOW,
			true, },
		{ 6, HDMI_HDMI },
	},
	{
		{ 1920, 1080, 148500, 44, 88, 148, 5, 4, 36,
			OMAPDSS_SIG_ACTIVE_HIGH, OMAPDSS_SIG_ACTIVE_HIGH,
			false, },
		{ 16, HDMI_HDMI },
	},
	{
		{ 720, 576, 27000, 64, 12, 68, 5, 5, 39,
			OMAPDSS_SIG_ACTIVE_LOW, OMAPDSS_SIG_ACTIVE_LOW,
			false, },
		{ 17, HDMI_HDMI