path: root/drivers/video/omap2/displays/panel-taal.c

/*
 * Taal DSI command mode panel
 *
 * Copyright (C) 2009 Nokia Corporation
 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.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 DEBUG*/

#include <linux/module.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/jiffies.h>
#include <linux/sched.h>
#include <linux/backlight.h>
#include <linux/fb.h>
#include <linux/interrupt.h>
#include <linux/gpio.h>
#include <linux/completion.h>
#include <linux/workqueue.h>

#include <plat/display.h>

/* DSI Virtual channel. Hardcoded for now. */
#define TCH 0

#define DCS_READ_NUM_ERRORS	0x05
#define DCS_READ_POWER_MODE	0x0a
#define DCS_READ_MADCTL		0x0b
#define DCS_READ_PIXEL_FORMAT	0x0c
#define DCS_RDDSDR		0x0f
#define DCS_SLEEP_IN		0x10
#define DCS_SLEEP_OUT		0x11
#define DCS_DISPLAY_OFF		0x28
#define DCS_DISPLAY_ON		0x29
#define DCS_COLUMN_ADDR		0x2a
#define DCS_PAGE_ADDR		0x2b
#define DCS_MEMORY_WRITE	0x2c
#define DCS_TEAR_OFF		0x34
#define DCS_TEAR_ON		0x35
#define DCS_MEM_ACC_CTRL	0x36
#define DCS_PIXEL_FORMAT	0x3a
#define DCS_BRIGHTNESS		0x51
#define DCS_CTRL_DISPLAY	0x53
#define DCS_WRITE_CABC		0x55
#define DCS_READ_CABC		0x56
#define DCS_GET_ID1		0xda
#define DCS_GET_ID2		0xdb
#define DCS_GET_ID3		0xdc

/* #define TAAL_USE_ESD_CHECK */
#define TAAL_ESD_CHECK_PERIOD	msecs_to_jiffies(5000)

static int _taal_enable_te(struct omap_dss_device *dssdev, bool enable);

struct taal_data {
	struct backlight_device *bldev;

	unsigned long	hw_guard_end;	/* next value of jiffies when we can
					 * issue the next sleep in/out command
					 */
	unsigned long	hw_guard_wait;	/* max guard time in jiffies */

	struct omap_dss_device *dssdev;

	bool enabled;
	u8 rotate;
	bool mirror;

	bool te_enabled;
	bool use_ext_te;
	struct completion te_completion;

	bool use_dsi_bl;

	bool cabc_broken;
	unsigned cabc_mode;

	bool intro_printed;

	struct workqueue_struct *esd_wq;
	struct delayed_work esd_work;
};

static void taal_esd_work(struct work_struct *work);

static void hw_guard_start(struct taal_data *td, int guard_msec)
{
	td->hw_guard_wait = msecs_to_jiffies(guard_msec);
	td->hw_guard_end = jiffies + td->hw_guard_wait;
}

static void hw_guard_wait(struct taal_data *td)
{
	unsigned long wait = td->hw_guard_end - jiffies;

	if ((long)wait > 0 && wait <= td->hw_guard_wait) {
		set_current_state(TASK_UNINTERRUPTIBLE);
		schedule_timeout(wait);
	}
}

static int taal_dcs_read_1(u8 dcs_cmd, u8 *data)
{
	int r;
	u8 buf[1];

	r = dsi_vc_dcs_read(TCH, dcs_cmd, buf, 1);

	if (r < 0)
		return r;

	*data = buf[0];

	return 0;
}

static int taal_dcs_write_0(u8 dcs_cmd)
{
	return dsi_vc_dcs_write(TCH, &dcs_cmd, 1);
}

static int taal_dcs_write_1(u8 dcs_cmd, u8 param)
{
	u8 buf[2];
	buf[0] = dcs_cmd;
	buf[1] = param;
	return dsi_vc_dcs_write(TCH, buf, 2);
}

static int taal_sleep_in(struct taal_data *td)

{
	u8 cmd;
	int r;

	hw_guard_wait(td);

	cmd = DCS_SLEEP_IN;
	r = dsi_vc_dcs_write_nosync(TCH, &cmd, 1);
	if (r)
		return r;

	hw_guard_start(td, 120