kernel_samsung_msm8974/drivers/video/msm/mddi_sharp.c

/* Copyright (c) 2008-2010, 2012 The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only 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.
 *
 */

#include "msm_fb.h"
#include "mddihost.h"
#include "mddihosti.h"

#define SHARP_QVGA_PRIM 1
#define SHARP_128X128_SECD 2

extern uint32 mddi_host_core_version;
static boolean mddi_debug_prim_wait = FALSE;
static boolean mddi_sharp_vsync_wake = TRUE;
static boolean mddi_sharp_monitor_refresh_value = TRUE;
static boolean mddi_sharp_report_refresh_measurements = FALSE;
static uint32 mddi_sharp_rows_per_second = 13830;	/* 5200000/376 */
static uint32 mddi_sharp_rows_per_refresh = 338;
static uint32 mddi_sharp_usecs_per_refresh = 24440;	/* (376+338)/5200000 */
static boolean mddi_sharp_debug_60hz_refresh = FALSE;

extern mddi_gpio_info_type mddi_gpio;
extern boolean mddi_vsync_detect_enabled;
static msm_fb_vsync_handler_type mddi_sharp_vsync_handler;
static void *mddi_sharp_vsync_handler_arg;
static uint16 mddi_sharp_vsync_attempts;

static void mddi_sharp_prim_lcd_init(void);
static void mddi_sharp_sub_lcd_init(void);
static void mddi_sharp_lcd_set_backlight(struct msm_fb_data_type *mfd);
static void mddi_sharp_vsync_set_handler(msm_fb_vsync_handler_type handler,
					 void *);
static void mddi_sharp_lcd_vsync_detected(boolean detected);
static struct msm_panel_common_pdata *mddi_sharp_pdata;

#define REG_SYSCTL    0x0000
#define REG_INTR    0x0006
#define REG_CLKCNF    0x000C
#define REG_CLKDIV1    0x000E
#define REG_CLKDIV2    0x0010

#define REG_GIOD    0x0040
#define REG_GIOA    0x0042

#define REG_AGM      0x010A
#define REG_FLFT    0x0110
#define REG_FRGT    0x0112
#define REG_FTOP    0x0114
#define REG_FBTM    0x0116
#define REG_FSTRX    0x0118
#define REG_FSTRY    0x011A
#define REG_VRAM    0x0202
#define REG_SSDCTL    0x0330
#define REG_SSD0    0x0332
#define REG_PSTCTL1    0x0400
#define REG_PSTCTL2    0x0402
#define REG_PTGCTL    0x042A
#define REG_PTHP    0x042C
#define REG_PTHB    0x042E
#define REG_PTHW    0x0430
#define REG_PTHF    0x0432
#define REG_PTVP    0x0434
#define REG_PTVB    0x0436
#define REG_PTVW    0x0438
#define REG_PTVF    0x043A
#define REG_VBLKS    0x0458
#define REG_VBLKE    0x045A
#define REG_SUBCTL    0x0700
#define REG_SUBTCMD    0x0702
#define REG_SUBTCMDD  0x0704
#define REG_REVBYTE    0x0A02
#define REG_REVCNT    0x0A04
#define REG_REVATTR    0x0A06
#define REG_REVFMT    0x0A08

#define SHARP_SUB_UNKNOWN 0xffffffff
#define SHARP_SUB_HYNIX 1
#define SHARP_SUB_ROHM  2

static uint32 sharp_subpanel_type = SHARP_SUB_UNKNOWN;

static void sub_through_write(int sub_rs, uint32 sub_data)
{
	mddi_queue_register_write(REG_SUBTCMDD, sub_data, FALSE, 0);

	/* CS=1,RD=1,WE=1,RS=sub_rs */
	mddi_queue_register_write(REG_SUBTCMD, 0x000e | sub_rs, FALSE, 0);

	/* CS=0,RD=1,WE=1,RS=sub_rs */
	mddi_queue_register_write(REG_SUBTCMD, 0x0006 | sub_rs, FALSE, 0);

	/* CS=0,RD=1,WE=0,RS=sub_rs */
	mddi_queue_register_write(REG_SUBTCMD, 0x0004 | sub_rs, FALSE, 0);

	/* CS=0,RD=1,WE=1,RS=sub_rs */
	mddi_queue_register_write(REG_SUBTCMD, 0x0006 | sub_rs, FALSE, 0);

	/* CS=1,RD=1,WE=1,RS=sub_rs */
	mddi_queue_register_write(REG_SUBTCMD, 0x000e | sub_rs, TRUE, 0);
}

static uint32 sub_through_read(int sub_rs)
{
	uint32 sub_data;

	/* CS=1,RD=1,WE=1,RS=sub_rs */
	mddi_queue_register_write(REG_SUBTCMD, 0x000e | sub_rs, FALSE, 0);

	/* CS=0,RD=1,WE=1,RS=sub_rs */
	mddi_queue_register_write(REG_SUBTCMD, 0x0006 | sub_rs, FALSE, 0);

	/* CS=0,RD=1,WE=0,RS=sub_rs */
	mddi_queue_register_write(REG_SUBTCMD, 0x0002 | sub_rs, TRUE, 0);

	mddi_queue_register_read(REG_SUBTCMDD, &sub_data, TRUE, 0);

	/* CS=0,RD=1,WE=1,RS=sub_rs */
	mddi_queue_register_write(REG_SUBTCMD, 0x0006 | sub_rs, FALSE, 0);

	/* CS=1,RD=1,WE=1,RS=sub_rs */
	mddi_queue_register_write(REG_SUBTCMD, 0x000e | sub_rs, TRUE, 0);

	return sub_data;
}

static void serigo(uint32 ssd)
{
	uint32 ssdctl;

	mddi_queue_register_read(REG_SSDCTL, &ssdctl, TRUE, 0);
	ssdctl = ((ssdctl & 0xE7) | 0x02);

	mddi_queue_register_write(REG_SSD0, ssd, FALSE, 0);
	mddi_queue_register_write(REG_SSDCTL, ssdctl, TRUE, 0);

	do {
		mddi_queue_register_read(REG_SSDCTL, &ssdctl, TRUE, 0);
	} while ((ssdctl & 0x0002) != 0);

	if (mddi_debug_prim_wait)
		mddi_wait(2);
}

static void mddi_sharp_lcd_powerdown(void)
{
	serigo(0x0131);
	serigo(0x0300);
	mddi_wait(40);
	serigo(0x0135);
	mddi_wait(20);
	serigo(0x2122);
	mddi_wait(20);
	serigo(0x0201);
	mddi_wait(20);
	serigo(0x2100);
	mddi_wait(20);
	serigo(0x2000);
	mddi_wait(20);

	mddi_queue_register_write(REG_PSTCTL1, 0x1, TRUE, 0);
	mddi_wait(100);
	mddi_queue_register_write(REG_PSTCTL1, 0x0, TRUE, 0);
	mddi_wait(2);
	mddi_queue_register_write(REG_SYSCTL, 0x1, TRUE, 0);
	mddi_wait(2);
	mddi_queue_register_write(REG_CLKDIV1, 0x3, TRUE, 0);
	mddi_wait(2);
	mddi_queue_register_write(REG_SSDCTL, 0x0000, TRUE, 0);	/* SSDRESET */
	mddi_queue_register_write(REG_SYSCTL, 0x0, TRUE, 0);
	mddi_wait(2);
}

static void mddi_sharp_lcd_set_backlight(struct msm_fb_data_type *mfd)
{
	uint32 regdata;
	int32 level;
	int max = mfd->panel_info.bl_max;
	int min = mfd->panel_info.bl_min;

	if (mddi_sharp_pdata && mddi_sharp_pdata->backlight_level) {
		level = mddi_sharp_pdata->backlight_level(mfd->bl_level,
							  max,
							  min);

		if (level < 0)
			return;

		/* use Rodem GPIO(2:0) to give 8 levels of backlight (7-0) */
		/* Set lower 3 GPIOs as Outputs (set to 0) */
		mddi_queue_register_read(REG_GIOA, &regdata, TRUE, 0);
		mddi_queue_register_write(REG_GIOA, regdata & 0xfff8, TRUE, 0);

		/* Set lower 3 GPIOs as level */
		mddi_queue_register_read(REG_GIOD, &regdata, TRUE, 0);
		mddi_queue_register_write(REG_GIOD,
			  (regdata & 0xfff8) | (0x07 & level), TRUE, 0);
	}
}

static void mddi_sharp_prim_lcd_init(void)
{
	mddi_queue_register_write(REG_SYSCTL, 0x4000, TRUE, 0);
	mddi_wait(1);
	mddi_queue_register_write(REG_SYSCTL, 0x0000, TRUE, 0);
	mddi_wait(5);
	mddi_queue_register_write(REG_SYSCTL, 0x0001, FALSE, 0);
	mddi_queue_register_write(REG_CLKDIV1, 0x000b, FALSE, 0);

	/* new reg write below */
	if (mddi_sharp_debug_60hz_refresh)
		mddi_queue_register_write(REG_CLKCNF, 0x070d, FALSE, 0);
	else
		mddi_queue_register_write(REG_CLKCNF, 0x0708, FALSE, 0);

	mddi_queue_register_write(REG_SYSCTL, 0x0201, FALSE, 0);
	mddi_queue_register_write(REG_PTGCTL, 0x0010, FALSE, 0);
	mddi_queue_register_write(REG_PTHP, 4, FALSE, 0);
	mddi_queue_register_write(REG_PTHB, 40, FALSE, 0);
	mddi_queue_register_write(REG_PTHW, 240, FALSE, 0);
	if (mddi_sharp_debug_60hz_refresh)
		mddi_queue_register_write(REG_PTHF, 12, FALSE, 0);
	else
		mddi_queue_register_write(REG_PTHF, 92, FALSE, 0);

	mddi_wait(1);

	mddi_queue_register_write(REG_PTVP, 1, FALSE, 0);
	mddi_queue_register_write(REG_PTVB, 2, FALSE, 0);
	mddi_queue_register_write(REG_PTVW, 320, FALSE, 0);
	mddi_queue_register_write(REG_PTVF, 15, FALSE, 0);

	mddi_wait(1);

	/* vram_color set REG_AGM???? */
	mddi_queue_register_write(REG_AGM, 0x0000, TRUE, 0);

	mddi_queue_register_write(REG_SSDCTL, 0x0000, FALSE, 0);
	mddi_queue_register_write(REG_SSDCTL, 0x0001, TRUE, 0);
	mddi_wait(1);
	mddi_queue_register_write(REG_PSTCTL1, 0x0001, TRUE, 0);
	mddi_wait(10);

	serigo(0x0701);
	/* software reset */
	mddi_wait(1);
	/* Wait over 50us */

	serigo(0x0400);
	/* DCLK~ACHSYNC~ACVSYNC polarity setting */
	serigo(0x2900);
	/* EEPROM start read address setting */
	serigo(0x2606);
	/* EEPROM start read register setting */
	mddi_wait(20);
	/* Wait over 20ms */

	serigo(0x0503);
	/* Horizontal timing setting */
	serigo(0x062C);
	/* Veritical timing setting */
	serigo(0x2001);
	/* power initialize setting(VDC2) */
	mddi_wait(20);
	/* Wait over 20ms */

	serigo(0x2120);
	/* Initialize power setting(CPS) */
	mddi_wait(20);
	/* Wait over 20ms */

	serigo(0x2130);
	/* Initialize power setting(CPS) */
	mddi_wait(20);
	/* Wait over 20ms */

	serigo(0x2132);
	/* Initialize power setting(CPS) */
	mddi_wait(10);
	/* Wait over 10ms */

	serigo(0x2133);
	/* Initialize power setting(CPS) */
	mddi_wait(20);
	/* Wait over 20ms */

	serigo(0x0200);
	/* Panel initialize release(INIT) */
	mddi_wait(1);
	/* Wait over 1ms */

	serigo(0x0131);
	/* Panel setting(CPS) */
	mddi_wait(1);
	/* Wait over 1ms */

	mddi_queue_register_write(REG_PSTCTL1, 0x0003, TRUE, 0);

	/* if (FFA LCD is upside down) -> serigo(0x0100); */
	serigo(0x0130);

	/* Black mask release(display ON) */
	mddi_wait(1);
	/* Wait over 1ms */

	if (mddi_sharp_vsync_wake) {
		mddi_queue_register_write(REG_VBLKS, 0x1001, TRUE, 0);
		mddi_queue_register_write(REG_VBLKE, 0x1002, TRUE, 0);
	}

	/* Set the MDP pixel data attributes for Primary Display */
	mddi_host_write_pix_attr_reg(0x00C3);
	return;

}

void mddi_sharp_sub_lcd_init(void)
{

	mddi_queue_register_write(REG_SYSCTL, 0x4000, FALSE, 0);
	mddi_queue_register_write(REG_SYSCTL, 0x0000, TRUE, 0);
	mddi_wait(100);

	mddi_queue_register_write(REG_SYSCTL, 0x0001, FALSE, 0);
	mddi_queue_register_write(REG_CLKDIV1, 0x000b, FALSE, 0);
	mddi_queue_register_write(REG_CLKCNF, 0x0708, FALSE, 0);
	mddi_queue_register_write(REG_SYSCTL, 0x0201, FALSE, 0);
	mddi_queue_register_write(REG_PTGCTL, 0x0010, FALSE, 0);
	mddi_queue_register_write(REG_PTHP, 4, FALSE, 0);
	mddi_queue_register_write(REG_PTHB, 40, FALSE, 0);
	mddi_queue_register_write(REG_PTHW, 128, FALSE, 0);
	mddi_queue_register_write(REG_PTHF, 92, FALSE, 0);
	mddi_queue_register_write(REG_PTVP, 1, FALSE, 0);
	mddi_queue_register_write(REG_PTVB, 2, FALSE, 0);
	mddi_queue_register_write(REG_PTVW, 128, FALSE, 0);
	mddi_queue_register_write(REG_PTVF, 15, FALSE, 0);

	/* Now the sub display..... */
	/* Reset High */
	mddi_queue_register_write(REG_SUBCTL, 0x0200, FALSE, 0);
	/* CS=1,RD=1,WE=1,RS=1 */
	mddi_queue_register_write(REG_SUBTCMD, 0x000f, TRUE, 0);
	mddi_wait(1);
	/* Wait 5us */

	if (sharp_subpanel_type == SHARP_SUB_UNKNOWN) {
		uint32 data;

		sub_through_write(1, 0x05);
		sub_through_write(1, 0x6A);
		sub_through_write(1, 0x1D);
		sub_through_write(1, 0x05);
		data = sub_through_read(1);
		if (data == 0x6A) {
			sharp_subpanel_type = SHARP_SUB_HYNIX;
		} else {
			sub_through_write(0, 0x36);
			sub_through_write(1, 0xA8);
			sub_through_write(0, 0x09);
			data = sub_through_read(1);
			data = sub_through_read(1);
			if (data == 0x54) {
				sub_through_write(0, 0x36);
				sub_through_write(1, 0x00);
				sharp_subpanel_type = SHARP_SUB_ROHM;
			}
		}
	}

	if (sharp_subpanel_type == SHARP_SUB_HYNIX) {
		sub_through_write(1, 0x00);	/* Display setting 1 */
		sub_through_write(1, 0x04);
		sub_through_write(1, 0x01);
		sub_through_write(1, 0x05);
		sub_through_write(1, 0x0280);
		sub_through_write(1, 0x0301);
		sub_through_write(1, 0x0402);
		sub_through_write(1, 0x0500);
		sub_through_write(1, 0x0681);
		sub_through_write(1, 0x077F);
		sub_through_write(1, 0x08C0);
		sub_through_write(1, 0x0905);
		sub_through_write(1, 0x0A02);
		sub_through_write(1, 0x0B00);
		sub_through_write(1, 0x0C00);
		sub_through_write(1, 0x0D00);
		sub_through_write(1, 0x0E00);
		sub_through_write(1, 0x0F00);

		sub_through_write(1, 0x100B);	/* Display setting 2 */
		sub_through_write(1, 0x1103);
		sub_through_write(1, 0x1237);
		sub_through_write(1, 0x1300);
		sub_through_write(1, 0x1400);
		sub_through_write(1, 0x1500);
		sub_through_write(1, 0x1605);
		sub_through_write(1, 0x1700);
		sub_through_write(1, 0x1800);
		sub_through_write(1, 0x192E);
		sub_through_write(1, 0x1A00);
		sub_through_write(1, 0x1B00);
		sub_through_write(1, 0x1C00);

		sub_through_write(1, 0x151A);	/* Power setting */

		sub_through_write(1, 0x2002);	/* Gradation Palette setting */
		sub_through_write(1, 0x2107);
		sub_through_write(1, 0x220C);
		sub_through_write(1, 0x2310);
		sub_through_write(1, 0x2414);
		sub_through_write(1, 0x2518);
		sub_through_write(1, 0x261C);
		sub_through_write(1, 0x2720);
		sub_through_write(1, 0x2824);
		sub_through_write(1, 0x2928);
		sub_through_write(1, 0x2A2B);
		sub_through_write(1, 0x2B2E);
		sub_through_write(1, 0x2C31);
		sub_through_write(1, 0x2D34);
		sub_through_write(1, 0x2E37);
		sub_through_write(1, 0x2F3A);
		sub_through_write(1, 0x303C);
		sub_through_write(1, 0x313E);
		sub_through_write(1, 0x323F);
		sub_through_write(1, 0x3340);
		sub_through_write(1, 0x3441);
		sub_through_write(1, 0x3543);
		sub_through_write(1, 0x3646);
		sub_through_write(1, 0x3749);
		sub_through_write(1, 0x384C);
		sub_through_write(1, 0x394F);
		sub_through_write(1, 0x3A52);
		sub_through_write(1, 0x3B59);
		sub_through_write(1, 0x3C60);
		sub_through_write(1, 0x3D67);
		sub_through_write(1, 0x3E6E);
		sub_through_write(1, 0x3F7F);
		sub_through_write(1, 0x4001);
		sub_through_write(1, 0x4107);
		sub_through_write(1, 0x420C);
		sub_through_write(1, 0x4310);
		sub_through_write(1, 0x4414);
		sub_through_write(1, 0x4518);
		sub_through_write(1, 0x461C);
		sub_through_write(1, 0x4720);
		sub_through_write(1, 0x4824);
		sub_through_write(1, 0x4928);
		sub_through_write(1, 0x4A2B);
		sub_through_write(1, 0x4B2E);
		sub_through_write(1, 0x4C31);
		sub_through_write(1, 0x4D34);
		sub_through_write(1, 0x4E37);
		sub_through_write(1, 0x4F3A);
		sub_through_write(1, 0x503C);
		sub_through_write(1, 0x513E);
		sub_through_write(1, 0x523F);
		sub_through_write(1, 0x5340);
		sub_through_write(1, 0x5441);
		sub_through_write(1, 0x5543);
		sub_through_write(1, 0x5646);
		sub_through_write(1, 0x5749);
		sub_through_write(1, 0x584C);
		sub_through_write(1, 0x594F);
		sub_through_write(1, 0x5A52);
		sub_through_write(1, 0x5B59);
		sub_through_write(1, 0x5C60);
		sub_through_write(1, 0x5D67);
		sub_through_write(1, 0x5E6E);
		sub_through_write(1, 0x5F7E);
		sub_through_write(1, 0x6000);
		sub_through_write(1, 0x6107);
		sub_through_write(1, 0x620C);
		sub_through_write(1, 0x6310);
		sub_through_write(1, 0x6414);
		sub_through_write(1, 0x6518);
		sub_through_write(1, 0x661C);
		sub_through_write(1, 0x6720);
		sub_through_write(1, 0x6824);
		sub_through_write(1, 0x6928);
		sub_through_write(1, 0x6A2B);
		sub_through_write(1, 0x6B2E);
		sub_through_write(1, 0x6C31);
		sub_through_write(1, 0x6D34);
		sub_through_write(1, 0x6E37);
		sub_through_write(1, 0x6F3A);
		sub_through_write(1, 0x703C);
		sub_through_write(1, 0x713E);
		sub_through_write(1, 0x723F);
		sub_through_write(1, 0x7340);
		sub_through_write(1, 0x7441);
		sub_through_write(1, 0x7543);
		sub_through_write(1, 0x7646);
		sub_through_write(1, 0x7749);
		sub_through_write(1, 0x784C);
		sub_through_write(1, 0x794F);
		sub_through_write(1, 0x7A52);
		sub_through_write(1, 0x7B59);
		sub_through_write(1, 0x7C60);
		sub_through_write(1, 0x7D67);
		sub_through_write(1, 0x7E6E);
		sub_through_write(1, 0x7F7D);

		sub_through_write(1, 0x1851);	/* Display on */

		mddi_queue_register_write(REG_AGM, 0x0000, TRUE, 0);

		/* 1 pixel / 1 post clock */
		mddi_queue_register_write(REG_CLKDIV2, 0x3b00, FALSE, 0);

		/* SUB LCD select */
		mddi_queue_register_write(REG_PSTCTL2, 0x0080, FALSE, 0);

		/* RS=0,command initiate number=0,select master mode */
		mddi_queue_register_write(REG_SUBCTL, 0x0202, FALSE, 0);

		/* Sub LCD Data transform start */
		mddi_queue_register_write(REG_PSTCTL1, 0x0003, FALSE, 0);

	} else if (sharp_subpanel_type == SHARP_SUB_ROHM) {

		sub_through_write(0, 0x01);	/* Display setting */
		sub_through_write(1, 0x00);

		mddi_wait(1);
		/* Wait 100us  <----- ******* Update 2005/01/24 */

		sub_through_write(0, 0xB6);
		sub_through_write(1, 0x0C);
		sub_through_write(1, 0x4A);
		sub_through_write(1, 0x20);
		sub_through_write(0, 0x3A);
		sub_through_write(1, 0x05);
		sub_through_write(0, 0xB7);
		sub_through_write(1, 0x01);
		sub_through_write(0, 0xBA);
		sub_through_write(1, 0x20);
		sub_through_write(1, 0x02);
		sub_through_write(0, 0x25);
		sub_through_write(1, 0x4F);
		sub_through_write(0, 0xBB);
		sub_through_write(1, 0x00);
		sub_through_write(0, 0x36);
		sub_through_write(1, 0x00);
		sub_through_write(0, 0xB1);
		sub_through_write(1, 0x05);
		sub_through_write(0, 0xBE);
		sub_through_write(1, 0x80);
		sub_through_write(0, 0x26);
		sub_through_write(1, 0x01);
		sub_through_write(0, 0x2A);
		sub_through_write(1, 0x02);
		sub_through_write(1, 0x81);
		sub_through_write(0, 0x2B);
		sub_through_write(1, 0x00);
		sub_through_write(1, 0x7F);

		sub_through_write(0, 0x2C);
		sub_through_write(0, 0x11);	/* Sleep mode off */

		mddi_wait(1);
		/* Wait 100 ms <----- ******* Update 2005/01/24 */

		sub_through_write(0, 0x29);	/* Display on */
		sub_through_write(0, 0xB3);
		sub_through_write(1, 0x20);
		sub_through_write(1, 0xAA);
		sub_through_write(1, 0xA0);
		sub_through_write(1, 0x20);
		sub_through_write(1, 0x30);
		sub_through_write(1, 0xA6);
		sub_through_write(1, 0xFF);
		sub_through_write(1, 0x9A);
		sub_through_write(1, 0x9F);
		sub_through_write(1, 0xAF);
		sub_through_write(1, 0xBC);
		sub_through_write(1, 0xCF);
		sub_through_write(1, 0xDF);
		sub_through_write(1, 0x20);
		sub_through_write(1, 0x9C);
		sub_through_write(1, 0x8A);

		sub_through_write(0, 0x002C);	/* Display on */

		/* 1 pixel / 2 post clock */
		mddi_queue_register_write(REG_CLKDIV2, 0x7b00, FALSE, 0);

		/* SUB LCD select */
		mddi_queue_register_write(REG_PSTCTL2, 0x0080, FALSE, 0);

		/* RS=1,command initiate number=0,select master mode */
		mddi_queue_register_write(REG_SUBCTL, 0x0242, FALSE, 0);

		/* Sub LCD Data transform start */
		mddi_queue_register_write(REG_PSTCTL1, 0x0003, FALSE, 0);

	}

	/* Set the MDP pixel data attributes for Sub Display */
	mddi_host_write_pix_attr_reg(0x00C0);
}

void mddi_sharp_lcd_vsync_detected(boolean detected)
{
	/* static timetick_type start_time = 0; */
	static struct timeval start_time;
	static boolean first_time = TRUE;
	/* uint32 mdp_cnt_val = 0; */
	/* timetick_type elapsed_us; */
	struct timeval now;
	uint32 elapsed_us;
	uint32 num_vsyncs;

	if ((detected) || (mddi_sharp_vsync_attempts > 5)) {
		if ((detected) && (mddi_sharp_monitor_refresh_value)) {
			/* if (start_time != 0) */
			if (!first_time) {
				jiffies_to_timeval(jiffies, &now);
				elapsed_us =
				    (now.tv_sec - start_time.tv_sec) * 1000000 +
				    now.tv_usec - start_time.tv_usec;
				/*
				* LCD is configured for a refresh every usecs,
				* so to determine the number of vsyncs that
				* have occurred since the last measurement add
				* half that to the time difference and divide
				* by the refresh rate.
				*/
				num_vsyncs = (elapsed_us +
					      (mddi_sharp_usecs_per_refresh >>
					       1)) /
				    mddi_sharp_usecs_per_refresh;
				/*
				 * LCD is configured for * hsyncs (rows) per
				 * refresh cycle. Calculate new rows_per_second
				 * value based upon these new measurements.
				 * MDP can update with this new value.
				 */
				mddi_sharp_rows_per_second =
				    (mddi_sharp_rows_per_refresh * 1000 *
				     num_vsyncs) / (elapsed_us / 1000);
			}
			/* start_time = timetick_get(); */
			first_time = FALSE;
			jiffies_to_timeval(jiffies, &start_time);
			if (mddi_sharp_report_refresh_measurements) {
				/* mdp_cnt_val = MDP_LINE_COUNT; */
			}
		}
		/* if detected = TRUE, client initiated wakeup was detected */
		if (mddi_sharp_vsync_handler != NULL) {
			(*mddi_sharp_vsync_handler)
			    (mddi_sharp_vsync_handler_arg);
			mddi_sharp_vsync_handler = NULL;
		}
		mddi_vsync_detect_enabled = FALSE;
		mddi_sharp_vsync_attempts = 0;
		/* need to clear this vsync wakeup */
		if (!mddi_queue_register_write_int(REG_INTR, 0x0000)) {
			MDDI_MSG_ERR("Vsync interrupt clear failed!\n");
		}
		if (!detected) {
			/* give up after 5 failed attempts but show error */
			MDDI_MSG_NOTICE("Vsync detection failed!\n");
		} else if ((mddi_sharp_monitor_refresh_value) &&
			(mddi_sharp_report_refresh_measurements)) {
			MDDI_MSG_NOTICE("  Lines Per Second=%d!\n",
				mddi_sharp_rows_per_second);
		}
	} else
		/* if detected = FALSE, we woke up from hibernation, but did not
		 * detect client initiated wakeup.
		 */
		mddi_sharp_vsync_attempts++;
}

/* ISR to be executed */
void mddi_sharp_vsync_set_handler(msm_fb_vsync_handler_type handler, void *arg)
{
	boolean error = FALSE;
	unsigned long flags;

	/* Disable interrupts */
	spin_lock_irqsave(&mddi_host_spin_lock, flags);
	/* INTLOCK(); */

	if (mddi_sharp_vsync_handler != NULL)
		error = TRUE;

	/* Register the handler for this particular GROUP interrupt source */
	mddi_sharp_vsync_handler = handler;
	mddi_sharp_vsync_handler_arg = arg;

	/* Restore interrupts */
	spin_unlock_irqrestore(&mddi_host_spin_lock, flags);
	/* INTFREE(); */

	if (error)
		MDDI_MSG_ERR("MDDI: Previous Vsync handler never called\n");

	/* Enable the vsync wakeup */
	mddi_queue_register_write(REG_INTR, 0x8100, FALSE, 0);

	mddi_sharp_vsync_attempts = 1;
	mddi_vsync_detect_enabled = TRUE;
}				/* mddi_sharp_vsync_set_handler */

static int mddi_sharp_lcd_on(struct platform_device *pdev)
{
	struct msm_fb_data_type *mfd;

	mfd = platform_get_drvdata(pdev);

	if (!mfd)
		return -ENODEV;

	if (mfd->key != MFD_KEY)
		return -EINVAL;

	mddi_host_client_cnt_reset();

	if (mfd->panel.id == SHARP_QVGA_PRIM)
		mddi_sharp_prim_lcd_init();
	else
		mddi_sharp_sub_lcd_init();

	return 0;
}

static int mddi_sharp_lcd_off(struct platform_device *pdev)
{
	if (mddi_sharp_vsync_handler != NULL) {
		(*mddi_sharp_vsync_handler)
			    (mddi_sharp_vsync_handler_arg);
		mddi_sharp_vsync_handler = NULL;
		printk(KERN_INFO "%s: clean up vsyn_handler=%x\n", __func__,
				(int)mddi_sharp_vsync_handler);
	}

	mddi_sharp_lcd_powerdown();
	return 0;
}

static int __devinit mddi_sharp_probe(struct platform_device *pdev)
{
	if (pdev->id == 0) {
		mddi_sharp_pdata = pdev->dev.platform_data;
		return 0;
	}

	msm_fb_add_device(pdev);

	return 0;
}

static struct platform_driver this_driver = {
	.probe  = mddi_sharp_probe,
	.driver = {
		.name   = "mddi_sharp_qvga",
	},
};

static struct msm_fb_panel_data mddi_sharp_panel_data0 = {
	.on = mddi_sharp_lcd_on,
	.off = mddi_sharp_lcd_off,
	.set_backlight = mddi_sharp_lcd_set_backlight,
	.set_vsync_notifier = mddi_sharp_vsync_set_handler,
};

static struct platform_device this_device_0 = {
	.name   = "mddi_sharp_qvga",
	.id	= SHARP_QVGA_PRIM,
	.dev	= {
		.platform_data = &mddi_sharp_panel_data0,
	}
};

static struct msm_fb_panel_data mddi_sharp_panel_data1 = {
	.on = mddi_sharp_lcd_on,
	.off = mddi_sharp_lcd_off,
};

static struct platform_device this_device_1 = {
	.name   = "mddi_sharp_qvga",
	.id	= SHARP_128X128_SECD,
	.dev	= {
		.platform_data = &mddi_sharp_panel_data1,
	}
};

static int __init mddi_sharp_init(void)
{
	int ret;
	struct msm_panel_info *pinfo;

#ifdef CONFIG_FB_MSM_MDDI_AUTO_DETECT
	u32 id;

	ret = msm_fb_detect_client("mddi_sharp_qvga");
	if (ret == -ENODEV)
		return 0;

	if (ret) {
		id = mddi_get_client_id();

		if (((id >> 16) != 0x0) || ((id & 0xffff) != 0x8835))
			return 0;
	}
#endif
	if (mddi_host_core_version > 8) {
		/* can use faster refresh with newer hw revisions */
		mddi_sharp_debug_60hz_refresh = TRUE;

		/* Timing variables for tracking vsync */
		/* dot_clock = 6.00MHz
		 * horizontal count = 296
		 * vertical count = 338
		 * refresh rate = 6000000/(296+338) = 60Hz
		 */
		mddi_sharp_rows_per_second = 20270;	/* 6000000/296 */
		mddi_sharp_rows_per_refresh = 338;
		mddi_sharp_usecs_per_refresh = 16674;	/* (296+338)/6000000 */
	} else {
		/* Timing variables for tracking vsync */
		/* dot_clock = 5.20MHz
		 * horizontal count = 376
		 * vertical count = 338
		 * refresh rate = 5200000/(376+338) = 41Hz
		 */
		mddi_sharp_rows_per_second = 13830;	/* 5200000/376 */
		mddi_sharp_rows_per_refresh = 338;
		mddi_sharp_usecs_per_refresh = 24440;	/* (376+338)/5200000 */
	}

	ret = platform_driver_register(&this_driver);
	if (!ret) {
		pinfo = &mddi_sharp_panel_data0.panel_info;
		pinfo->xres = 240;
		pinfo->yres = 320;
		MSM_FB_SINGLE_MODE_PANEL(pinfo);
		pinfo->type = MDDI_PANEL;
		pinfo->pdest = DISPLAY_1;
		pinfo->mddi.vdopkt = MDDI_DEFAULT_PRIM_PIX_ATTR;
		pinfo->wait_cycle = 0;
		pinfo->bpp = 18;
		pinfo->fb_num = 2;
		pinfo->clk_rate = 122880000;
		pinfo->clk_min = 120000000;
		pinfo->clk_max = 125000000;
		pinfo->lcd.vsync_enable = TRUE;
		pinfo->mddi.is_type1 = TRUE;
		pinfo->lcd.refx100 =
			(mddi_sharp_rows_per_second * 100) /
			mddi_sharp_rows_per_refresh;
		pinfo->lcd.v_back_porch = 12;
		pinfo->lcd.v_front_porch = 6;
		pinfo->lcd.v_pulse_width = 0;
		pinfo->lcd.hw_vsync_mode = FALSE;
		pinfo->lcd.vsync_notifier_period = (1 * HZ);
		pinfo->bl_max = 7;
		pinfo->bl_min = 1;

		ret = platform_device_register(&this_device_0);
		if (ret)
			platform_driver_unregister(&this_driver);

		pinfo = &mddi_sharp_panel_data1.panel_info;
		pinfo->xres = 128;
		pinfo->yres = 128;
		MSM_FB_SINGLE_MODE_PANEL(pinfo);
		pinfo->type = MDDI_PANEL;
		pinfo->pdest = DISPLAY_2;
		pinfo->mddi.vdopkt = 0x400;
		pinfo->wait_cycle = 0;
		pinfo->bpp = 18;
		pinfo->clk_rate = 122880000;
		pinfo->clk_min = 120000000;
		pinfo->clk_max = 125000000;
		pinfo->fb_num = 2;

		ret = platform_device_register(&this_device_1);
		if (ret) {
			platform_device_unregister(&this_device_0);
			platform_driver_unregister(&this_driver);
		}
	}

	if (!ret)
		mddi_lcd.vsync_detected = mddi_sharp_lcd_vsync_detected;

	return ret;
}

module_init(mddi_sharp_init);