EXYNOS: support EXYNOS MIPI DSI interface driver.

EXYNOS SoC platform has MIPI-DSI controller and MIPI-DSI
based LCD Panel could be used with it. This patch supports MIPI-DSI driver
based Samsung SoC chip.

LCD panel driver based MIPI-DSI should be registered to MIPI-DSI driver at
board file and LCD panel driver specific function registered to mipi_dsim_ddi
structure at lcd panel init function called system init.
In the MIPI-DSI driver, find lcd panel driver by using registered
lcd panel name, and then initialize lcd panel driver.

Signed-off-by: Donghwa Lee <dh09.lee@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Acked-by: Anatolij Gustschin <agust@denx.de>

6 files changed, 1703 insertions, 0 deletions

diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index 8896abe51..43bc7b4eb 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -29,6 +29,8 @@ COBJS-$(CONFIG_ATI_RADEON_FB) += ati_radeon_fb.o videomodes.o
 COBJS-$(CONFIG_ATMEL_LCD) += atmel_lcdfb.o
 COBJS-$(CONFIG_CFB_CONSOLE) += cfb_console.o
 COBJS-$(CONFIG_EXYNOS_FB) += exynos_fb.o exynos_fimd.o
+COBJS-$(CONFIG_EXYNOS_MIPI_DSIM) += exynos_mipi_dsi.o exynos_mipi_dsi_common.o \
+				exynos_mipi_dsi_lowlevel.o
 COBJS-$(CONFIG_FSL_DIU_FB) += fsl_diu_fb.o videomodes.o
 COBJS-$(CONFIG_S6E63D6) += s6e63d6.o
 COBJS-$(CONFIG_SED156X) += sed156x.o
diff --git a/drivers/video/exynos_mipi_dsi.c b/drivers/video/exynos_mipi_dsi.c
new file mode 100644
index 000000000..aee248c84
--- /dev/null
+++ b/drivers/video/exynos_mipi_dsi.c
@@ -0,0 +1,253 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ *
+ * Author: InKi Dae <inki.dae@samsung.com>
+ * Author: Donghwa Lee <dh09.lee@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <linux/err.h>
+#include <asm/arch/dsim.h>
+#include <asm/arch/mipi_dsim.h>
+#include <asm/arch/power.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/clk.h>
+
+#include "exynos_mipi_dsi_lowlevel.h"
+#include "exynos_mipi_dsi_common.h"
+
+#define master_to_driver(a)	(a->dsim_lcd_drv)
+#define master_to_device(a)	(a->dsim_lcd_dev)
+
+static struct exynos_platform_mipi_dsim *dsim_pd;
+
+struct mipi_dsim_ddi {
+	int				bus_id;
+	struct list_head		list;
+	struct mipi_dsim_lcd_device	*dsim_lcd_dev;
+	struct mipi_dsim_lcd_driver	*dsim_lcd_drv;
+};
+
+static LIST_HEAD(dsim_ddi_list);
+static LIST_HEAD(dsim_lcd_dev_list);
+
+int exynos_mipi_dsi_register_lcd_device(struct mipi_dsim_lcd_device *lcd_dev)
+{
+	struct mipi_dsim_ddi *dsim_ddi;
+
+	if (!lcd_dev) {
+		debug("mipi_dsim_lcd_device is NULL.\n");
+		return -EFAULT;
+	}
+
+	if (!lcd_dev->name) {
+		debug("dsim_lcd_device name is NULL.\n");
+		return -EFAULT;
+	}
+
+	dsim_ddi = kzalloc(sizeof(struct mipi_dsim_ddi), GFP_KERNEL);
+	if (!dsim_ddi) {
+		debug("failed to allocate dsim_ddi object.\n");
+		return -EFAULT;
+	}
+
+	dsim_ddi->dsim_lcd_dev = lcd_dev;
+
+	list_add_tail(&dsim_ddi->list, &dsim_ddi_list);
+
+	return 0;
+}
+
+struct mipi_dsim_ddi
+	*exynos_mipi_dsi_find_lcd_device(struct mipi_dsim_lcd_driver *lcd_drv)
+{
+	struct mipi_dsim_ddi *dsim_ddi;
+	struct mipi_dsim_lcd_device *lcd_dev;
+
+	list_for_each_entry(dsim_ddi, &dsim_ddi_list, list) {
+		lcd_dev = dsim_ddi->dsim_lcd_dev;
+		if (!lcd_dev)
+			continue;
+
+		if (lcd_drv->id >= 0) {
+			if ((strcmp(lcd_drv->name, lcd_dev->name)) == 0 &&
+					lcd_drv->id == lcd_dev->id) {
+				/**
+				 * bus_id would be used to identify
+				 * connected bus.
+				 */
+				dsim_ddi->bus_id = lcd_dev->bus_id;
+
+				return dsim_ddi;
+			}
+		} else {
+			if ((strcmp(lcd_drv->name, lcd_dev->name)) == 0) {
+				/**
+				 * bus_id would be used to identify
+				 * connected bus.
+				 */
+				dsim_ddi->bus_id = lcd_dev->bus_id;
+
+				return dsim_ddi;
+			}
+		}
+
+		kfree(dsim_ddi);
+		list_del(&dsim_ddi_list);
+	}
+
+	return NULL;
+}
+
+int exynos_mipi_dsi_register_lcd_driver(struct mipi_dsim_lcd_driver *lcd_drv)
+{
+	struct mipi_dsim_ddi *dsim_ddi;
+
+	if (!lcd_drv) {
+		debug("mipi_dsim_lcd_driver is NULL.\n");
+		return -EFAULT;
+	}
+
+	if (!lcd_drv->name) {
+		debug("dsim_lcd_driver name is NULL.\n");
+		return -EFAULT;
+	}
+
+	dsim_ddi = exynos_mipi_dsi_find_lcd_device(lcd_drv);
+	if (!dsim_ddi) {
+		debug("mipi_dsim_ddi object not found.\n");
+		return -EFAULT;
+	}
+
+	dsim_ddi->dsim_lcd_drv = lcd_drv;
+
+	debug("registered panel driver(%s) to mipi-dsi driver.\n",
+		lcd_drv->name);
+
+	return 0;
+
+}
+
+struct mipi_dsim_ddi
+	*exynos_mipi_dsi_bind_lcd_ddi(struct mipi_dsim_device *dsim,
+			const char *name)
+{
+	struct mipi_dsim_ddi *dsim_ddi;
+	struct mipi_dsim_lcd_driver *lcd_drv;
+	struct mipi_dsim_lcd_device *lcd_dev;
+
+	list_for_each_entry(dsim_ddi, &dsim_ddi_list, list) {
+		lcd_drv = dsim_ddi->dsim_lcd_drv;
+		lcd_dev = dsim_ddi->dsim_lcd_dev;
+		if (!lcd_drv || !lcd_dev)
+			continue;
+
+		debug("lcd_drv->id = %d, lcd_dev->id = %d\n",
+					lcd_drv->id, lcd_dev->id);
+
+		if ((strcmp(lcd_drv->name, name) == 0)) {
+			lcd_dev->master = dsim;
+
+			dsim->dsim_lcd_dev = lcd_dev;
+			dsim->dsim_lcd_drv = lcd_drv;
+
+			return dsim_ddi;
+		}
+	}
+
+	return NULL;
+}
+
+/* define MIPI-DSI Master operations. */
+static struct mipi_dsim_master_ops master_ops = {
+	.cmd_write			= exynos_mipi_dsi_wr_data,
+	.get_dsim_frame_done		= exynos_mipi_dsi_get_frame_done_status,
+	.clear_dsim_frame_done		= exynos_mipi_dsi_clear_frame_done,
+};
+
+int exynos_mipi_dsi_init(void)
+{
+	struct mipi_dsim_device *dsim;
+	struct mipi_dsim_config *dsim_config;
+	struct mipi_dsim_ddi *dsim_ddi;
+
+	dsim = kzalloc(sizeof(struct mipi_dsim_device), GFP_KERNEL);
+	if (!dsim) {
+		debug("failed to allocate dsim object.\n");
+		return -EFAULT;
+	}
+
+	/* get mipi_dsim_config. */
+	dsim_config = dsim_pd->dsim_config;
+	if (dsim_config == NULL) {
+		debug("failed to get dsim config data.\n");
+		return -EFAULT;
+	}
+
+	dsim->pd = dsim_pd;
+	dsim->dsim_config = dsim_config;
+	dsim->master_ops = &master_ops;
+
+	/* bind lcd ddi matched with panel name. */
+	dsim_ddi = exynos_mipi_dsi_bind_lcd_ddi(dsim, dsim_pd->lcd_panel_name);
+	if (!dsim_ddi) {
+		debug("mipi_dsim_ddi object not found.\n");
+		return -ENOSYS;
+	}
+	if (dsim_pd->lcd_power)
+		dsim_pd->lcd_power();
+
+	if (dsim_pd->mipi_power)
+		dsim_pd->mipi_power();
+
+	/* phy_enable(unsigned int dev_index, unsigned int enable) */
+	if (dsim_pd->phy_enable)
+		dsim_pd->phy_enable(0, 1);
+
+	set_mipi_clk();
+
+	exynos_mipi_dsi_init_dsim(dsim);
+	exynos_mipi_dsi_init_link(dsim);
+	exynos_mipi_dsi_set_hs_enable(dsim);
+
+	/* set display timing. */
+	exynos_mipi_dsi_set_display_mode(dsim, dsim->dsim_config);
+
+	/* initialize mipi-dsi client(lcd panel). */
+	if (dsim_ddi->dsim_lcd_drv && dsim_ddi->dsim_lcd_drv->mipi_panel_init) {
+		dsim_ddi->dsim_lcd_drv->mipi_panel_init(dsim);
+		dsim_ddi->dsim_lcd_drv->mipi_display_on(dsim);
+	}
+
+	debug("mipi-dsi driver(%s mode) has been probed.\n",
+		(dsim_config->e_interface == DSIM_COMMAND) ?
+			"CPU" : "RGB");
+
+	return 0;
+}
+
+void exynos_set_dsim_platform_data(struct exynos_platform_mipi_dsim *pd)
+{
+	if (pd == NULL) {
+		debug("pd is NULL\n");
+		return;
+	}
+
+	dsim_pd = pd;
+}
diff --git a/drivers/video/exynos_mipi_dsi_common.c b/drivers/video/exynos_mipi_dsi_common.c
new file mode 100644
index 000000000..6eeb46424
--- /dev/null
+++ b/drivers/video/exynos_mipi_dsi_common.c
@@ -0,0 +1,637 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ *
+ * Author: InKi Dae <inki.dae@samsung.com>
+ * Author: Donghwa Lee <dh09.lee@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <lcd.h>
+#include <linux/err.h>
+#include <asm/arch/dsim.h>
+#include <asm/arch/mipi_dsim.h>
+
+#include "exynos_mipi_dsi_lowlevel.h"
+
+#define MHZ			(1000 * 1000)
+#define FIN_HZ			(24 * MHZ)
+
+#define DFIN_PLL_MIN_HZ		(6 * MHZ)
+#define DFIN_PLL_MAX_HZ		(12 * MHZ)
+
+#define DFVCO_MIN_HZ		(500 * MHZ)
+#define DFVCO_MAX_HZ		(1000 * MHZ)
+
+#define TRY_GET_FIFO_TIMEOUT	(5000 * 2)
+
+/* MIPI-DSIM status types. */
+enum {
+	DSIM_STATE_INIT,	/* should be initialized. */
+	DSIM_STATE_STOP,	/* CPU and LCDC are LP mode. */
+	DSIM_STATE_HSCLKEN,	/* HS clock was enabled. */
+	DSIM_STATE_ULPS
+};
+
+/* define DSI lane types. */
+enum {
+	DSIM_LANE_CLOCK = (1 << 0),
+	DSIM_LANE_DATA0 = (1 << 1),
+	DSIM_LANE_DATA1 = (1 << 2),
+	DSIM_LANE_DATA2 = (1 << 3),
+	DSIM_LANE_DATA3 = (1 << 4)
+};
+
+static unsigned int dpll_table[15] = {
+	100, 120, 170, 220, 270,
+	320, 390, 450, 510, 560,
+	640, 690, 770, 870, 950
+};
+
+static void exynos_mipi_dsi_long_data_wr(struct mipi_dsim_device *dsim,
+		unsigned int data0, unsigned int data1)
+{
+	unsigned int data_cnt = 0, payload = 0;
+
+	/* in case that data count is more then 4 */
+	for (data_cnt = 0; data_cnt < data1; data_cnt += 4) {
+		/*
+		 * after sending 4bytes per one time,
+		 * send remainder data less then 4.
+		 */
+		if ((data1 - data_cnt) < 4) {
+			if ((data1 - data_cnt) == 3) {
+				payload = *(u8 *)(data0 + data_cnt) |
+					(*(u8 *)(data0 + (data_cnt + 1))) << 8 |
+					(*(u8 *)(data0 + (data_cnt + 2))) << 16;
+			debug("count = 3 payload = %x, %x %x %x\n",
+				payload, *(u8 *)(data0 + data_cnt),
+				*(u8 *)(data0 + (data_cnt + 1)),
+				*(u8 *)(data0 + (data_cnt + 2)));
+			} else if ((data1 - data_cnt) == 2) {
+				payload = *(u8 *)(data0 + data_cnt) |
+					(*(u8 *)(data0 + (data_cnt + 1))) << 8;
+			debug("count = 2 payload = %x, %x %x\n", payload,
+				*(u8 *)(data0 + data_cnt),
+				*(u8 *)(data0 + (data_cnt + 1)));
+			} else if ((data1 - data_cnt) == 1) {
+				payload = *(u8 *)(data0 + data_cnt);
+			}
+		} else {
+			/* send 4bytes per one time. */
+			payload = *(u8 *)(data0 + data_cnt) |
+				(*(u8 *)(data0 + (data_cnt + 1))) << 8 |
+				(*(u8 *)(data0 + (data_cnt + 2))) << 16 |
+				(*(u8 *)(data0 + (data_cnt + 3))) << 24;
+
+			debug("count = 4 payload = %x, %x %x %x %x\n",
+				payload, *(u8 *)(data0 + data_cnt),
+				*(u8 *)(data0 + (data_cnt + 1)),
+				*(u8 *)(data0 + (data_cnt + 2)),
+				*(u8 *)(data0 + (data_cnt + 3)));
+
+		}
+		exynos_mipi_dsi_wr_tx_data(dsim, payload);
+	}
+}
+
+int exynos_mipi_dsi_wr_data(struct mipi_dsim_device *dsim, unsigned int data_id,
+	unsigned int data0, unsigned int data1)
+{
+	unsigned int timeout = TRY_GET_FIFO_TIMEOUT;
+	unsigned long delay_val, delay;
+	unsigned int check_rx_ack = 0;
+
+	if (dsim->state == DSIM_STATE_ULPS) {
+		debug("state is ULPS.\n");
+
+		return -EINVAL;
+	}
+
+	delay_val = MHZ / dsim->dsim_config->esc_clk;
+	delay = 10 * delay_val;
+
+	mdelay(delay);
+
+	/* only if transfer mode is LPDT, wait SFR becomes empty. */
+	if (dsim->state == DSIM_STATE_STOP) {
+		while (!(exynos_mipi_dsi_get_fifo_state(dsim) &
+				SFR_HEADER_EMPTY)) {
+			if ((timeout--) > 0)
+				mdelay(1);
+			else {
+				debug("SRF header fifo is not empty.\n");
+				return -EINVAL;
+			}
+		}
+	}
+
+	switch (data_id) {
+	/* short packet types of packet types for command. */
+	case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM:
+	case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM:
+	case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM:
+	case MIPI_DSI_DCS_SHORT_WRITE:
+	case MIPI_DSI_DCS_SHORT_WRITE_PARAM:
+	case MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE:
+		debug("data0 = %x data1 = %x\n",
+				data0, data1);
+		exynos_mipi_dsi_wr_tx_header(dsim, data_id, data0, data1);
+		if (check_rx_ack) {
+			/* process response func should be implemented */
+			return 0;
+		} else {
+			return -EINVAL;
+		}
+
+	/* general command */
+	case MIPI_DSI_COLOR_MODE_OFF:
+	case MIPI_DSI_COLOR_MODE_ON:
+	case MIPI_DSI_SHUTDOWN_PERIPHERAL:
+	case MIPI_DSI_TURN_ON_PERIPHERAL:
+		exynos_mipi_dsi_wr_tx_header(dsim, data_id, data0, data1);
+		if (check_rx_ack) {
+			/* process response func should be implemented. */
+			return 0;
+		} else {
+			return -EINVAL;
+		}
+
+	/* packet types for video data */
+	case MIPI_DSI_V_SYNC_START:
+	case MIPI_DSI_V_SYNC_END:
+	case MIPI_DSI_H_SYNC_START:
+	case MIPI_DSI_H_SYNC_END:
+	case MIPI_DSI_END_OF_TRANSMISSION:
+		return 0;
+
+	/* short and response packet types for command */
+	case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM:
+	case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM:
+	case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM:
+	case MIPI_DSI_DCS_READ:
+		exynos_mipi_dsi_clear_all_interrupt(dsim);
+		exynos_mipi_dsi_wr_tx_header(dsim, data_id, data0, data1);
+		/* process response func should be implemented. */
+		return 0;
+
+	/* long packet type and null packet */
+	case MIPI_DSI_NULL_PACKET:
+	case MIPI_DSI_BLANKING_PACKET:
+		return 0;
+	case MIPI_DSI_GENERIC_LONG_WRITE:
+	case MIPI_DSI_DCS_LONG_WRITE:
+	{
+		unsigned int data_cnt = 0, payload = 0;
+
+		/* if data count is less then 4, then send 3bytes data.  */
+		if (data1 < 4) {
+			payload = *(u8 *)(data0) |
+				*(u8 *)(data0 + 1) << 8 |
+				*(u8 *)(data0 + 2) << 16;
+
+			exynos_mipi_dsi_wr_tx_data(dsim, payload);
+
+			debug("count = %d payload = %x,%x %x %x\n",
+				data1, payload,
+				*(u8 *)(data0 + data_cnt),
+				*(u8 *)(data0 + (data_cnt + 1)),
+				*(u8 *)(data0 + (data_cnt + 2)));
+		} else {
+			/* in case that data count is more then 4 */
+			exynos_mipi_dsi_long_data_wr(dsim, data0, data1);
+		}
+
+		/* put data into header fifo */
+		exynos_mipi_dsi_wr_tx_header(dsim, data_id, data1 & 0xff,
+			(data1 & 0xff00) >> 8);
+
+	}
+	if (check_rx_ack)
+		/* process response func should be implemented. */
+		return 0;
+	else
+		return -EINVAL;
+
+	/* packet typo for video data */
+	case MIPI_DSI_PACKED_PIXEL_STREAM_16:
+	case MIPI_DSI_PACKED_PIXEL_STREAM_18:
+	case MIPI_DSI_PIXEL_STREAM_3BYTE_18:
+	case MIPI_DSI_PACKED_PIXEL_STREAM_24:
+		if (check_rx_ack) {
+			/* process response func should be implemented. */
+			return 0;
+		} else {
+			return -EINVAL;
+		}
+	default:
+		debug("data id %x is not supported current DSI spec.\n",
+			data_id);
+
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+int exynos_mipi_dsi_pll_on(struct mipi_dsim_device *dsim, unsigned int enable)
+{
+	int sw_timeout;
+
+	if (enable) {
+		sw_timeout = 1000;
+
+		exynos_mipi_dsi_clear_interrupt(dsim);
+		exynos_mipi_dsi_enable_pll(dsim, 1);
+		while (1) {
+			sw_timeout--;
+			if (exynos_mipi_dsi_is_pll_stable(dsim))
+				return 0;
+			if (sw_timeout == 0)
+				return -EINVAL;
+		}
+	} else
+		exynos_mipi_dsi_enable_pll(dsim, 0);
+
+	return 0;
+}
+
+unsigned long exynos_mipi_dsi_change_pll(struct mipi_dsim_device *dsim,
+	unsigned int pre_divider, unsigned int main_divider,
+	unsigned int scaler)
+{
+	unsigned long dfin_pll, dfvco, dpll_out;
+	unsigned int i, freq_band = 0xf;
+
+	dfin_pll = (FIN_HZ / pre_divider);
+
+	/******************************************************
+	 *	Serial Clock(=ByteClk X 8)	FreqBand[3:0] *
+	 ******************************************************
+	 *	~ 99.99 MHz			0000
+	 *	100 ~ 119.99 MHz		0001
+	 *	120 ~ 159.99 MHz		0010
+	 *	160 ~ 199.99 MHz		0011
+	 *	200 ~ 239.99 MHz		0100
+	 *	140 ~ 319.99 MHz		0101
+	 *	320 ~ 389.99 MHz		0110
+	 *	390 ~ 449.99 MHz		0111
+	 *	450 ~ 509.99 MHz		1000
+	 *	510 ~ 559.99 MHz		1001
+	 *	560 ~ 639.99 MHz		1010
+	 *	640 ~ 689.99 MHz		1011
+	 *	690 ~ 769.99 MHz		1100
+	 *	770 ~ 869.99 MHz		1101
+	 *	870 ~ 949.99 MHz		1110
+	 *	950 ~ 1000 MHz			1111
+	 ******************************************************/
+	if (dfin_pll < DFIN_PLL_MIN_HZ || dfin_pll > DFIN_PLL_MAX_HZ) {
+		debug("fin_pll range should be 6MHz ~ 12MHz\n");
+		exynos_mipi_dsi_enable_afc(dsim, 0, 0);
+	} else {
+		if (dfin_pll < 7 * MHZ)
+			exynos_mipi_dsi_enable_afc(dsim, 1, 0x1);
+		else if (dfin_pll < 8 * MHZ)
+			exynos_mipi_dsi_enable_afc(dsim, 1, 0x0);
+		else if (dfin_pll < 9 * MHZ)
+			exynos_mipi_dsi_enable_afc(dsim, 1, 0x3);
+		else if (dfin_pll < 10 * MHZ)
+			exynos_mipi_dsi_enable_afc(dsim, 1, 0x2);
+		else if (dfin_pll < 11 * MHZ)
+			exynos_mipi_dsi_enable_afc(dsim, 1, 0x5);
+		else
+			exynos_mipi_dsi_enable_afc(dsim, 1, 0x4);
+	}
+
+	dfvco = dfin_pll * main_divider;
+	debug("dfvco = %lu, dfin_pll = %lu, main_divider = %d\n",
+				dfvco, dfin_pll, main_divider);
+	if (dfvco < DFVCO_MIN_HZ || dfvco > DFVCO_MAX_HZ)
+		debug("fvco range should be 500MHz ~ 1000MHz\n");
+
+	dpll_out = dfvco / (1 << scaler);
+	debug("dpll_out = %lu, dfvco = %lu, scaler = %d\n",
+		dpll_out, dfvco, scaler);
+
+	for (i = 0; i < ARRAY_SIZE(dpll_table); i++) {
+		if (dpll_out < dpll_table[i] * MHZ) {
+			freq_band = i;
+			break;
+		}
+	}
+
+	debug("freq_band = %d\n", freq_band);
+
+	exynos_mipi_dsi_pll_freq(dsim, pre_divider, main_divider, scaler);
+
+	exynos_mipi_dsi_hs_zero_ctrl(dsim, 0);
+	exynos_mipi_dsi_prep_ctrl(dsim, 0);
+
+	/* Freq Band */
+	exynos_mipi_dsi_pll_freq_band(dsim, freq_band);
+
+	/* Stable time */
+	exynos_mipi_dsi_pll_stable_time(dsim,
+				dsim->dsim_config->pll_stable_time);
+
+	/* Enable PLL */
+	debug("FOUT of mipi dphy pll is %luMHz\n",
+		(dpll_out / MHZ));
+
+	return dpll_out;
+}
+
+int exynos_mipi_dsi_set_clock(struct mipi_dsim_device *dsim,
+	unsigned int byte_clk_sel, unsigned int enable)
+{
+	unsigned int esc_div;
+	unsigned long esc_clk_error_rate;
+	unsigned long hs_clk = 0, byte_clk = 0, escape_clk = 0;
+
+	if (enable) {
+		dsim->e_clk_src = byte_clk_sel;
+
+		/* Escape mode clock and byte clock source */
+		exynos_mipi_dsi_set_byte_clock_src(dsim, byte_clk_sel);
+
+		/* DPHY, DSIM Link : D-PHY clock out */
+		if (byte_clk_sel == DSIM_PLL_OUT_DIV8) {
+			hs_clk = exynos_mipi_dsi_change_pll(dsim,
+				dsim->dsim_config->p, dsim->dsim_config->m,
+				dsim->dsim_config->s);
+			if (hs_clk == 0) {
+				debug("failed to get hs clock.\n");
+				return -EINVAL;
+			}
+
+			byte_clk = hs_clk / 8;
+			exynos_mipi_dsi_enable_pll_bypass(dsim, 0);
+			exynos_mipi_dsi_pll_on(dsim, 1);
+		/* DPHY : D-PHY clock out, DSIM link : external clock out */
+		} else if (byte_clk_sel == DSIM_EXT_CLK_DIV8)
+			debug("not support EXT CLK source for MIPI DSIM\n");
+		else if (byte_clk_sel == DSIM_EXT_CLK_BYPASS)
+			debug("not support EXT CLK source for MIPI DSIM\n");
+
+		/* escape clock divider */
+		esc_div = byte_clk / (dsim->dsim_config->esc_clk);
+		debug("esc_div = %d, byte_clk = %lu, esc_clk = %lu\n",
+			esc_div, byte_clk, dsim->dsim_config->esc_clk);
+		if ((byte_clk / esc_div) >= (20 * MHZ) ||
+			(byte_clk / esc_div) > dsim->dsim_config->esc_clk)
+			esc_div += 1;
+
+		escape_clk = byte_clk / esc_div;
+		debug("escape_clk = %lu, byte_clk = %lu, esc_div = %d\n",
+			escape_clk, byte_clk, esc_div);
+
+		/* enable escape clock. */
+		exynos_mipi_dsi_enable_byte_clock(dsim, 1);
+
+		/* enable byte clk and escape clock */
+		exynos_mipi_dsi_set_esc_clk_prs(dsim, 1, esc_div);
+		/* escape clock on lane */
+		exynos_mipi_dsi_enable_esc_clk_on_lane(dsim,
+			(DSIM_LANE_CLOCK | dsim->data_lane), 1);
+
+		debug("byte clock is %luMHz\n",
+			(byte_clk / MHZ));
+		debug("escape clock that user's need is %lu\n",
+			(dsim->dsim_config->esc_clk / MHZ));
+		debug("escape clock divider is %x\n", esc_div);
+		debug("escape clock is %luMHz\n",
+			((byte_clk / esc_div) / MHZ));
+
+		if ((byte_clk / esc_div) > escape_clk) {
+			esc_clk_error_rate = escape_clk /
+				(byte_clk / esc_div);
+			debug("error rate is %lu over.\n",
+				(esc_clk_error_rate / 100));
+		} else if ((byte_clk / esc_div) < (escape_clk)) {
+			esc_clk_error_rate = (byte_clk / esc_div) /
+				escape_clk;
+			debug("error rate is %lu under.\n",
+				(esc_clk_error_rate / 100));
+		}
+	} else {
+		exynos_mipi_dsi_enable_esc_clk_on_lane(dsim,
+			(DSIM_LANE_CLOCK | dsim->data_lane), 0);
+		exynos_mipi_dsi_set_esc_clk_prs(dsim, 0, 0);
+
+		/* disable escape clock. */
+		exynos_mipi_dsi_enable_byte_clock(dsim, 0);
+
+		if (byte_clk_sel == DSIM_PLL_OUT_DIV8)
+			exynos_mipi_dsi_pll_on(dsim, 0);
+	}
+
+	return 0;
+}
+
+int exynos_mipi_dsi_init_dsim(struct mipi_dsim_device *dsim)
+{
+	dsim->state = DSIM_STATE_INIT;
+
+	switch (dsim->dsim_config->e_no_data_lane) {
+	case DSIM_DATA_LANE_1:
+		dsim->data_lane = DSIM_LANE_DATA0;
+		break;
+	case DSIM_DATA_LANE_2:
+		dsim->data_lane = DSIM_LANE_DATA0 | DSIM_LANE_DATA1;
+		break;
+	case DSIM_DATA_LANE_3:
+		dsim->data_lane = DSIM_LANE_DATA0 | DSIM_LANE_DATA1 |
+			DSIM_LANE_DATA2;
+		break;
+	case DSIM_DATA_LANE_4:
+		dsim->data_lane = DSIM_LANE_DATA0 | DSIM_LANE_DATA1 |
+			DSIM_LANE_DATA2 | DSIM_LANE_DATA3;
+		break;
+	default:
+		debug("data lane is invalid.\n");
+		return -EINVAL;
+	};
+
+	exynos_mipi_dsi_sw_reset(dsim);
+	exynos_mipi_dsi_dp_dn_swap(dsim, 0);
+
+	return 0;
+}
+
+int exynos_mipi_dsi_enable_frame_done_int(struct mipi_dsim_device *dsim,
+	unsigned int enable)
+{
+	/* enable only frame done interrupt */
+	exynos_mipi_dsi_set_interrupt_mask(dsim, INTMSK_FRAME_DONE, enable);
+
+	return 0;
+}
+
+static void convert_to_fb_videomode(struct fb_videomode *mode1,
+				vidinfo_t *mode2)
+{
+	mode1->xres = mode2->vl_width;
+	mode1->yres = mode2->vl_height;
+	mode1->upper_margin = mode2->vl_vfpd;
+	mode1->lower_margin = mode2->vl_vbpd;
+	mode1->left_margin = mode2->vl_hfpd;
+	mode1->right_margin = mode2->vl_hbpd;
+	mode1->vsync_len = mode2->vl_vspw;
+	mode1->hsync_len = mode2->vl_hspw;
+}
+
+int exynos_mipi_dsi_set_display_mode(struct mipi_dsim_device *dsim,
+	struct mipi_dsim_config *dsim_config)
+{
+	struct exynos_platform_mipi_dsim *dsim_pd;
+	struct fb_videomode lcd_video;
+	vidinfo_t *vid;
+
+	dsim_pd = (struct exynos_platform_mipi_dsim *)dsim->pd;
+	vid = (vidinfo_t *)dsim_pd->lcd_panel_info;
+
+	convert_to_fb_videomode(&lcd_video, vid);
+
+	/* in case of VIDEO MODE (RGB INTERFACE), it sets polarities. */
+	if (dsim->dsim_config->e_interface == (u32) DSIM_VIDEO) {
+		if (dsim->dsim_config->auto_vertical_cnt == 0) {
+			exynos_mipi_dsi_set_main_disp_vporch(dsim,
+				vid->vl_cmd_allow_len,
+				lcd_video.upper_margin,
+				lcd_video.lower_margin);
+			exynos_mipi_dsi_set_main_disp_hporch(dsim,
+				lcd_video.left_margin,
+				lcd_video.right_margin);
+			exynos_mipi_dsi_set_main_disp_sync_area(dsim,
+				lcd_video.vsync_len,
+				lcd_video.hsync_len);
+		}
+	}
+
+	exynos_mipi_dsi_set_main_disp_resol(dsim, lcd_video.xres,
+			lcd_video.yres);
+
+	exynos_mipi_dsi_display_config(dsim, dsim->dsim_config);
+
+	debug("lcd panel ==> width = %d, height = %d\n",
+			lcd_video.xres, lcd_video.yres);
+
+	return 0;
+}
+
+int exynos_mipi_dsi_init_link(struct mipi_dsim_device *dsim)
+{
+	unsigned int time_out = 100;
+
+	switch (dsim->state) {
+	case DSIM_STATE_INIT:
+		exynos_mipi_dsi_init_fifo_pointer(dsim, 0x1f);
+
+		/* dsi configuration */
+		exynos_mipi_dsi_init_config(dsim);
+		exynos_mipi_dsi_enable_lane(dsim, DSIM_LANE_CLOCK, 1);
+		exynos_mipi_dsi_enable_lane(dsim, dsim->data_lane, 1);
+
+		/* set clock configuration */
+		exynos_mipi_dsi_set_clock(dsim,
+					dsim->dsim_config->e_byte_clk, 1);
+
+		/* check clock and data lane state are stop state */
+		while (!(exynos_mipi_dsi_is_lane_state(dsim))) {
+			time_out--;
+			if (time_out == 0) {
+				debug("DSI Master is not stop state.\n");
+				debug("Check initialization process\n");
+
+				return -EINVAL;
+			}
+		}
+
+		dsim->state = DSIM_STATE_STOP;
+
+		/* BTA sequence counters */
+		exynos_mipi_dsi_set_stop_state_counter(dsim,
+			dsim->dsim_config->stop_holding_cnt);
+		exynos_mipi_dsi_set_bta_timeout(dsim,
+			dsim->dsim_config->bta_timeout);
+		exynos_mipi_dsi_set_lpdr_timeout(dsim,
+			dsim->dsim_config->rx_timeout);
+
+		return 0;
+	default:
+		debug("DSI Master is already init.\n");
+		return 0;
+	}
+
+	return 0;
+}
+
+int exynos_mipi_dsi_set_hs_enable(struct mipi_dsim_device *dsim)
+{
+	if (dsim->state == DSIM_STATE_STOP) {
+		if (dsim->e_clk_src != DSIM_EXT_CLK_BYPASS) {
+			dsim->state = DSIM_STATE_HSCLKEN;
+
+			 /* set LCDC and CPU transfer mode to HS. */
+			exynos_mipi_dsi_set_lcdc_transfer_mode(dsim, 0);
+			exynos_mipi_dsi_set_cpu_transfer_mode(dsim, 0);
+
+			exynos_mipi_dsi_enable_hs_clock(dsim, 1);
+
+			return 0;
+		} else
+			debug("clock source is external bypass.\n");
+	} else
+		debug("DSIM is not stop state.\n");
+
+	return 0;
+}
+
+int exynos_mipi_dsi_set_data_transfer_mode(struct mipi_dsim_device *dsim,
+		unsigned int mode)
+{
+	if (mode) {
+		if (dsim->state != DSIM_STATE_HSCLKEN) {
+			debug("HS Clock lane is not enabled.\n");
+			return -EINVAL;
+		}
+
+		exynos_mipi_dsi_set_lcdc_transfer_mode(dsim, 0);
+	} else {
+		if (dsim->state == DSIM_STATE_INIT || dsim->state ==
+			DSIM_STATE_ULPS) {
+			debug("DSI Master is not STOP or HSDT state.\n");
+			return -EINVAL;
+		}
+
+		exynos_mipi_dsi_set_cpu_transfer_mode(dsim, 0);
+	}
+
+	return 0;
+}
+
+int exynos_mipi_dsi_get_frame_done_status(struct mipi_dsim_device *dsim)
+{
+	return _exynos_mipi_dsi_get_frame_done_status(dsim);
+}
+
+int exynos_mipi_dsi_clear_frame_done(struct mipi_dsim_device *dsim)
+{
+	_exynos_mipi_dsi_clear_frame_done(dsim);
+
+	return 0;
+}
diff --git a/drivers/video/exynos_mipi_dsi_common.h b/drivers/video/exynos_mipi_dsi_common.h
new file mode 100644
index 000000000..4d80679a5
--- /dev/null
+++ b/drivers/video/exynos_mipi_dsi_common.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ *
+ * Author: InKi Dae <inki.dae@samsung.com>
+ * Author: Donghwa Lee <dh09.lee@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <linux/fb.h>
+
+#ifndef _EXYNOS_MIPI_DSI_COMMON_H
+#define _EXYNOS_MIPI_DSI_COMMON_H
+
+int exynos_mipi_dsi_wr_data(struct mipi_dsim_device *dsim, unsigned int data_id,
+	unsigned int data0, unsigned int data1);
+int exynos_mipi_dsi_pll_on(struct mipi_dsim_device *dsim, unsigned int enable);
+unsigned long exynos_mipi_dsi_change_pll(struct mipi_dsim_device *dsim,
+	unsigned int pre_divider, unsigned int main_divider,
+	unsigned int scaler);
+int exynos_mipi_dsi_set_clock(struct mipi_dsim_device *dsim,
+	unsigned int byte_clk_sel, unsigned int enable);
+int exynos_mipi_dsi_init_dsim(struct mipi_dsim_device *dsim);
+int exynos_mipi_dsi_set_display_mode(struct mipi_dsim_device *dsim,
+			struct mipi_dsim_config *dsim_info);
+int exynos_mipi_dsi_init_link(struct mipi_dsim_device *dsim);
+int exynos_mipi_dsi_set_hs_enable(struct mipi_dsim_device *dsim);
+int exynos_mipi_dsi_set_data_transfer_mode(struct mipi_dsim_device *dsim,
+		unsigned int mode);
+int exynos_mipi_dsi_enable_frame_done_int(struct mipi_dsim_device *dsim,
+	unsigned int enable);
+int exynos_mipi_dsi_get_frame_done_status(struct mipi_dsim_device *dsim);
+int exynos_mipi_dsi_clear_frame_done(struct mipi_dsim_device *dsim);
+
+#endif /* _EXYNOS_MIPI_DSI_COMMON_H */
diff --git a/drivers/video/exynos_mipi_dsi_lowlevel.c b/drivers/video/exynos_mipi_dsi_lowlevel.c
new file mode 100644
index 000000000..d61b77361
--- /dev/null
+++ b/drivers/video/exynos_mipi_dsi_lowlevel.c
@@ -0,0 +1,652 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ *
+ * Author: InKi Dae <inki.dae@samsung.com>
+ * Author: Donghwa Lee <dh09.lee@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/arch/dsim.h>
+#include <asm/arch/mipi_dsim.h>
+#include <asm/arch/power.h>
+#include <asm/arch/cpu.h>
+
+#include "exynos_mipi_dsi_lowlevel.h"
+#include "exynos_mipi_dsi_common.h"
+
+void exynos_mipi_dsi_func_reset(struct mipi_dsim_device *dsim)
+{
+	unsigned int reg;
+
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+
+	reg = readl(&mipi_dsim->swrst);
+
+	reg |= DSIM_FUNCRST;
+
+	writel(reg, &mipi_dsim->swrst);
+}
+
+void exynos_mipi_dsi_sw_reset(struct mipi_dsim_device *dsim)
+{
+	unsigned int reg = 0;
+
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+
+	reg = readl(&mipi_dsim->swrst);
+
+	reg |= DSIM_SWRST;
+	reg |= DSIM_FUNCRST;
+
+	writel(reg, &mipi_dsim->swrst);
+}
+
+void exynos_mipi_dsi_sw_release(struct mipi_dsim_device *dsim)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = readl(&mipi_dsim->intsrc);
+
+	reg |= INTSRC_SWRST_RELEASE;
+
+	writel(reg, &mipi_dsim->intsrc);
+}
+
+void exynos_mipi_dsi_set_interrupt_mask(struct mipi_dsim_device *dsim,
+		unsigned int mode, unsigned int mask)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = readl(&mipi_dsim->intmsk);
+
+	if (mask)
+		reg |= mode;
+	else
+		reg &= ~mode;
+
+	writel(reg, &mipi_dsim->intmsk);
+}
+
+void exynos_mipi_dsi_init_fifo_pointer(struct mipi_dsim_device *dsim,
+		unsigned int cfg)
+{
+	unsigned int reg;
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+
+	reg = readl(&mipi_dsim->fifoctrl);
+
+	writel(reg & ~(cfg), &mipi_dsim->fifoctrl);
+	udelay(10 * 1000);
+	reg |= cfg;
+
+	writel(reg, &mipi_dsim->fifoctrl);
+}
+
+/*
+ * this function set PLL P, M and S value in D-PHY
+ */
+void exynos_mipi_dsi_set_phy_tunning(struct mipi_dsim_device *dsim,
+		unsigned int value)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+
+	writel(DSIM_AFC_CTL(value), &mipi_dsim->phyacchr);
+}
+
+void exynos_mipi_dsi_set_main_disp_resol(struct mipi_dsim_device *dsim,
+	unsigned int width_resol, unsigned int height_resol)
+{
+	unsigned int reg;
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+
+	/* standby should be set after configuration so set to not ready*/
+	reg = (readl(&mipi_dsim->mdresol)) & ~(DSIM_MAIN_STAND_BY);
+	writel(reg, &mipi_dsim->mdresol);
+
+	/* reset resolution */
+	reg &= ~(DSIM_MAIN_VRESOL(0x7ff) | DSIM_MAIN_HRESOL(0x7ff));
+	reg |= DSIM_MAIN_VRESOL(height_resol) | DSIM_MAIN_HRESOL(width_resol);
+
+	reg |= DSIM_MAIN_STAND_BY;
+	writel(reg, &mipi_dsim->mdresol);
+}
+
+void exynos_mipi_dsi_set_main_disp_vporch(struct mipi_dsim_device *dsim,
+	unsigned int cmd_allow, unsigned int vfront, unsigned int vback)
+{
+	unsigned int reg;
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+
+	reg = (readl(&mipi_dsim->mvporch)) &
+		~((DSIM_CMD_ALLOW_MASK) | (DSIM_STABLE_VFP_MASK) |
+		(DSIM_MAIN_VBP_MASK));
+
+	reg |= ((cmd_allow & 0xf) << DSIM_CMD_ALLOW_SHIFT) |
+		((vfront & 0x7ff) << DSIM_STABLE_VFP_SHIFT) |
+		((vback & 0x7ff) << DSIM_MAIN_VBP_SHIFT);
+
+	writel(reg, &mipi_dsim->mvporch);
+}
+
+void exynos_mipi_dsi_set_main_disp_hporch(struct mipi_dsim_device *dsim,
+	unsigned int front, unsigned int back)
+{
+	unsigned int reg;
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+
+	reg = (readl(&mipi_dsim->mhporch)) &
+		~((DSIM_MAIN_HFP_MASK) | (DSIM_MAIN_HBP_MASK));
+
+	reg |= (front << DSIM_MAIN_HFP_SHIFT) | (back << DSIM_MAIN_HBP_SHIFT);
+
+	writel(reg, &mipi_dsim->mhporch);
+}
+
+void exynos_mipi_dsi_set_main_disp_sync_area(struct mipi_dsim_device *dsim,
+	unsigned int vert, unsigned int hori)
+{
+	unsigned int reg;
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+
+	reg = (readl(&mipi_dsim->msync)) &
+		~((DSIM_MAIN_VSA_MASK) | (DSIM_MAIN_HSA_MASK));
+
+	reg |= ((vert & 0x3ff) << DSIM_MAIN_VSA_SHIFT) |
+		(hori << DSIM_MAIN_HSA_SHIFT);
+
+	writel(reg, &mipi_dsim->msync);
+}
+
+void exynos_mipi_dsi_set_sub_disp_resol(struct mipi_dsim_device *dsim,
+	unsigned int vert, unsigned int hori)
+{
+	unsigned int reg;
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+
+	reg = (readl(&mipi_dsim->sdresol)) &
+		~(DSIM_SUB_STANDY_MASK);
+
+	writel(reg, &mipi_dsim->sdresol);
+
+	reg &= ~(DSIM_SUB_VRESOL_MASK) | ~(DSIM_SUB_HRESOL_MASK);
+	reg |= ((vert & 0x7ff) << DSIM_SUB_VRESOL_SHIFT) |
+		((hori & 0x7ff) << DSIM_SUB_HRESOL_SHIFT);
+	writel(reg, &mipi_dsim->sdresol);
+
+	/* DSIM STANDBY */
+	reg |= (1 << DSIM_SUB_STANDY_SHIFT);
+	writel(reg, &mipi_dsim->sdresol);
+}
+
+void exynos_mipi_dsi_init_config(struct mipi_dsim_device *dsim)
+{
+	struct mipi_dsim_config *dsim_config = dsim->dsim_config;
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int cfg = (readl(&mipi_dsim->config)) &
+		~((1 << DSIM_EOT_PACKET_SHIFT) |
+		(0x1f << DSIM_HSA_MODE_SHIFT) |
+		(0x3 << DSIM_NUM_OF_DATALANE_SHIFT));
+
+	cfg |=	(dsim_config->auto_flush << DSIM_AUTO_FLUSH_SHIFT) |
+		(dsim_config->eot_disable << DSIM_EOT_PACKET_SHIFT) |
+		(dsim_config->auto_vertical_cnt << DSIM_AUTO_MODE_SHIFT) |
+		(dsim_config->hse << DSIM_HSE_MODE_SHIFT) |
+		(dsim_config->hfp << DSIM_HFP_MODE_SHIFT) |
+		(dsim_config->hbp << DSIM_HBP_MODE_SHIFT) |
+		(dsim_config->hsa << DSIM_HSA_MODE_SHIFT) |
+		(dsim_config->e_no_data_lane << DSIM_NUM_OF_DATALANE_SHIFT);
+
+	writel(cfg, &mipi_dsim->config);
+}
+
+void exynos_mipi_dsi_display_config(struct mipi_dsim_device *dsim,
+				struct mipi_dsim_config *dsim_config)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+
+	u32 reg = (readl(&mipi_dsim->config)) &
+		~((0x3 << DSIM_BURST_MODE_SHIFT) | (1 << DSIM_VIDEO_MODE_SHIFT)
+		| (0x3 << DSIM_MAINVC_SHIFT) | (0x7 << DSIM_MAINPIX_SHIFT)
+		| (0x3 << DSIM_SUBVC_SHIFT) | (0x7 << DSIM_SUBPIX_SHIFT));
+
+	if (dsim_config->e_interface == DSIM_VIDEO)
+		reg |= (1 << DSIM_VIDEO_MODE_SHIFT);
+	else if (dsim_config->e_interface == DSIM_COMMAND)
+		reg &= ~(1 << DSIM_VIDEO_MODE_SHIFT);
+	else {
+		printf("unknown lcd type.\n");
+		return;
+	}
+
+	/* main lcd */
+	reg |= ((u8) (dsim_config->e_burst_mode) & 0x3) << DSIM_BURST_MODE_SHIFT
+	| ((u8) (dsim_config->e_virtual_ch) & 0x3) << DSIM_MAINVC_SHIFT
+	| ((u8) (dsim_config->e_pixel_format) & 0x7) << DSIM_MAINPIX_SHIFT;
+
+	writel(reg, &mipi_dsim->config);
+}
+
+void exynos_mipi_dsi_enable_lane(struct mipi_dsim_device *dsim,
+			unsigned int lane, unsigned int enable)
+{
+	unsigned int reg;
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+
+	reg = readl(&mipi_dsim->config);
+
+	if (enable)
+		reg |= DSIM_LANE_ENx(lane);
+	else
+		reg &= ~DSIM_LANE_ENx(lane);
+
+	writel(reg, &mipi_dsim->config);
+}
+
+void exynos_mipi_dsi_set_data_lane_number(struct mipi_dsim_device *dsim,
+	unsigned int count)
+{
+	unsigned int cfg;
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+
+	/* get the data lane number. */
+	cfg = DSIM_NUM_OF_DATA_LANE(count);
+
+	writel(cfg, &mipi_dsim->config);
+}
+
+void exynos_mipi_dsi_enable_afc(struct mipi_dsim_device *dsim,
+			unsigned int enable, unsigned int afc_code)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = readl(&mipi_dsim->phyacchr);
+
+	reg = 0;
+
+	if (enable) {
+		reg |= DSIM_AFC_EN;
+		reg &= ~(0x7 << DSIM_AFC_CTL_SHIFT);
+		reg |= DSIM_AFC_CTL(afc_code);
+	} else
+		reg &= ~DSIM_AFC_EN;
+
+	writel(reg, &mipi_dsim->phyacchr);
+}
+
+void exynos_mipi_dsi_enable_pll_bypass(struct mipi_dsim_device *dsim,
+	unsigned int enable)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = (readl(&mipi_dsim->clkctrl)) &
+		~(DSIM_PLL_BYPASS_EXTERNAL);
+
+	reg |= enable << DSIM_PLL_BYPASS_SHIFT;
+
+	writel(reg, &mipi_dsim->clkctrl);
+}
+
+void exynos_mipi_dsi_pll_freq_band(struct mipi_dsim_device *dsim,
+		unsigned int freq_band)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = (readl(&mipi_dsim->pllctrl)) &
+		~(0x1f << DSIM_FREQ_BAND_SHIFT);
+
+	reg |= ((freq_band & 0x1f) << DSIM_FREQ_BAND_SHIFT);
+
+	writel(reg, &mipi_dsim->pllctrl);
+}
+
+void exynos_mipi_dsi_pll_freq(struct mipi_dsim_device *dsim,
+		unsigned int pre_divider, unsigned int main_divider,
+		unsigned int scaler)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = (readl(&mipi_dsim->pllctrl)) &
+		~(0x7ffff << 1);
+
+	reg |= ((pre_divider & 0x3f) << DSIM_PREDIV_SHIFT) |
+		((main_divider & 0x1ff) << DSIM_MAIN_SHIFT) |
+		((scaler & 0x7) << DSIM_SCALER_SHIFT);
+
+	writel(reg, &mipi_dsim->pllctrl);
+}
+
+void exynos_mipi_dsi_pll_stable_time(struct mipi_dsim_device *dsim,
+	unsigned int lock_time)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+
+	writel(lock_time, &mipi_dsim->plltmr);
+}
+
+void exynos_mipi_dsi_enable_pll(struct mipi_dsim_device *dsim,
+				unsigned int enable)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = (readl(&mipi_dsim->pllctrl)) &
+		~(0x1 << DSIM_PLL_EN_SHIFT);
+
+	reg |= ((enable & 0x1) << DSIM_PLL_EN_SHIFT);
+
+	writel(reg, &mipi_dsim->pllctrl);
+}
+
+void exynos_mipi_dsi_set_byte_clock_src(struct mipi_dsim_device *dsim,
+		unsigned int src)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = (readl(&mipi_dsim->clkctrl)) &
+		~(0x3 << DSIM_BYTE_CLK_SRC_SHIFT);
+
+	reg |= ((unsigned int) src) << DSIM_BYTE_CLK_SRC_SHIFT;
+
+	writel(reg, &mipi_dsim->clkctrl);
+}
+
+void exynos_mipi_dsi_enable_byte_clock(struct mipi_dsim_device *dsim,
+		unsigned int enable)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = (readl(&mipi_dsim->clkctrl)) &
+		~(1 << DSIM_BYTE_CLKEN_SHIFT);
+
+	reg |= enable << DSIM_BYTE_CLKEN_SHIFT;
+
+	writel(reg, &mipi_dsim->clkctrl);
+}
+
+void exynos_mipi_dsi_set_esc_clk_prs(struct mipi_dsim_device *dsim,
+		unsigned int enable, unsigned int prs_val)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = (readl(&mipi_dsim->clkctrl)) &
+		~((1 << DSIM_ESC_CLKEN_SHIFT) | (0xffff));
+
+	reg |= enable << DSIM_ESC_CLKEN_SHIFT;
+	if (enable)
+		reg |= prs_val;
+
+	writel(reg, &mipi_dsim->clkctrl);
+}
+
+void exynos_mipi_dsi_enable_esc_clk_on_lane(struct mipi_dsim_device *dsim,
+		unsigned int lane_sel, unsigned int enable)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = readl(&mipi_dsim->clkctrl);
+
+	if (enable)
+		reg |= DSIM_LANE_ESC_CLKEN(lane_sel);
+	else
+		reg &= ~DSIM_LANE_ESC_CLKEN(lane_sel);
+
+	writel(reg, &mipi_dsim->clkctrl);
+}
+
+void exynos_mipi_dsi_force_dphy_stop_state(struct mipi_dsim_device *dsim,
+	unsigned int enable)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = (readl(&mipi_dsim->escmode)) &
+		~(0x1 << DSIM_FORCE_STOP_STATE_SHIFT);
+
+	reg |= ((enable & 0x1) << DSIM_FORCE_STOP_STATE_SHIFT);
+
+	writel(reg, &mipi_dsim->escmode);
+}
+
+unsigned int exynos_mipi_dsi_is_lane_state(struct mipi_dsim_device *dsim)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = readl(&mipi_dsim->status);
+
+	/**
+	 * check clock and data lane states.
+	 * if MIPI-DSI controller was enabled at bootloader then
+	 * TX_READY_HS_CLK is enabled otherwise STOP_STATE_CLK.
+	 * so it should be checked for two case.
+	 */
+	if ((reg & DSIM_STOP_STATE_DAT(0xf)) &&
+			((reg & DSIM_STOP_STATE_CLK) ||
+			 (reg & DSIM_TX_READY_HS_CLK)))
+		return 1;
+	else
+		return 0;
+}
+
+void exynos_mipi_dsi_set_stop_state_counter(struct mipi_dsim_device *dsim,
+		unsigned int cnt_val)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = (readl(&mipi_dsim->escmode)) &
+		~(0x7ff << DSIM_STOP_STATE_CNT_SHIFT);
+
+	reg |= ((cnt_val & 0x7ff) << DSIM_STOP_STATE_CNT_SHIFT);
+
+	writel(reg, &mipi_dsim->escmode);
+}
+
+void exynos_mipi_dsi_set_bta_timeout(struct mipi_dsim_device *dsim,
+		unsigned int timeout)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = (readl(&mipi_dsim->timeout)) &
+		~(0xff << DSIM_BTA_TOUT_SHIFT);
+
+	reg |= (timeout << DSIM_BTA_TOUT_SHIFT);
+
+	writel(reg, &mipi_dsim->timeout);
+}
+
+void exynos_mipi_dsi_set_lpdr_timeout(struct mipi_dsim_device *dsim,
+		unsigned int timeout)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = (readl(&mipi_dsim->timeout)) &
+		~(0xffff << DSIM_LPDR_TOUT_SHIFT);
+
+	reg |= (timeout << DSIM_LPDR_TOUT_SHIFT);
+
+	writel(reg, &mipi_dsim->timeout);
+}
+
+void exynos_mipi_dsi_set_cpu_transfer_mode(struct mipi_dsim_device *dsim,
+		unsigned int lp)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = readl(&mipi_dsim->escmode);
+
+	reg &= ~DSIM_CMD_LPDT_LP;
+
+	if (lp)
+		reg |= DSIM_CMD_LPDT_LP;
+
+	writel(reg, &mipi_dsim->escmode);
+}
+
+void exynos_mipi_dsi_set_lcdc_transfer_mode(struct mipi_dsim_device *dsim,
+		unsigned int lp)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = readl(&mipi_dsim->escmode);
+
+	reg &= ~DSIM_TX_LPDT_LP;
+
+	if (lp)
+		reg |= DSIM_TX_LPDT_LP;
+
+	writel(reg, &mipi_dsim->escmode);
+}
+
+void exynos_mipi_dsi_enable_hs_clock(struct mipi_dsim_device *dsim,
+		unsigned int enable)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = (readl(&mipi_dsim->clkctrl)) &
+		~(1 << DSIM_TX_REQUEST_HSCLK_SHIFT);
+
+	reg |= enable << DSIM_TX_REQUEST_HSCLK_SHIFT;
+
+	writel(reg, &mipi_dsim->clkctrl);
+}
+
+void exynos_mipi_dsi_dp_dn_swap(struct mipi_dsim_device *dsim,
+		unsigned int swap_en)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = readl(&mipi_dsim->phyacchr1);
+
+	reg &= ~(0x3 << DSIM_DPDN_SWAP_DATA_SHIFT);
+	reg |= (swap_en & 0x3) << DSIM_DPDN_SWAP_DATA_SHIFT;
+
+	writel(reg, &mipi_dsim->phyacchr1);
+}
+
+void exynos_mipi_dsi_hs_zero_ctrl(struct mipi_dsim_device *dsim,
+		unsigned int hs_zero)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = (readl(&mipi_dsim->pllctrl)) &
+		~(0xf << DSIM_ZEROCTRL_SHIFT);
+
+	reg |= ((hs_zero & 0xf) << DSIM_ZEROCTRL_SHIFT);
+
+	writel(reg, &mipi_dsim->pllctrl);
+}
+
+void exynos_mipi_dsi_prep_ctrl(struct mipi_dsim_device *dsim, unsigned int prep)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = (readl(&mipi_dsim->pllctrl)) &
+		~(0x7 << DSIM_PRECTRL_SHIFT);
+
+	reg |= ((prep & 0x7) << DSIM_PRECTRL_SHIFT);
+
+	writel(reg, &mipi_dsim->pllctrl);
+}
+
+void exynos_mipi_dsi_clear_interrupt(struct mipi_dsim_device *dsim)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = readl(&mipi_dsim->intsrc);
+
+	reg |= INTSRC_PLL_STABLE;
+
+	writel(reg, &mipi_dsim->intsrc);
+}
+
+void exynos_mipi_dsi_clear_all_interrupt(struct mipi_dsim_device *dsim)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+
+	writel(0xffffffff, &mipi_dsim->intsrc);
+}
+
+unsigned int exynos_mipi_dsi_is_pll_stable(struct mipi_dsim_device *dsim)
+{
+	unsigned int reg;
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+
+	reg = readl(&mipi_dsim->status);
+
+	return reg & DSIM_PLL_STABLE ? 1 : 0;
+}
+
+unsigned int exynos_mipi_dsi_get_fifo_state(struct mipi_dsim_device *dsim)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+
+	return readl(&mipi_dsim->fifoctrl) & ~(0x1f);
+}
+
+void exynos_mipi_dsi_wr_tx_header(struct mipi_dsim_device *dsim,
+	unsigned int di, unsigned int data0, unsigned int data1)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = (DSIM_PKTHDR_DAT1(data1) | DSIM_PKTHDR_DAT0(data0) |
+			DSIM_PKTHDR_DI(di));
+
+	writel(reg, &mipi_dsim->pkthdr);
+}
+
+unsigned int _exynos_mipi_dsi_get_frame_done_status(struct mipi_dsim_device
+						*dsim)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = readl(&mipi_dsim->intsrc);
+
+	return (reg & INTSRC_FRAME_DONE) ? 1 : 0;
+}
+
+void _exynos_mipi_dsi_clear_frame_done(struct mipi_dsim_device *dsim)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+	unsigned int reg = readl(&mipi_dsim->intsrc);
+
+	writel(reg | INTSRC_FRAME_DONE, &mipi_dsim->intsrc);
+}
+
+void exynos_mipi_dsi_wr_tx_data(struct mipi_dsim_device *dsim,
+		unsigned int tx_data)
+{
+	struct exynos_mipi_dsim *mipi_dsim =
+		(struct exynos_mipi_dsim *)samsung_get_base_mipi_dsim();
+
+	writel(tx_data, &mipi_dsim->payload);
+}
diff --git a/drivers/video/exynos_mipi_dsi_lowlevel.h b/drivers/video/exynos_mipi_dsi_lowlevel.h
new file mode 100644
index 000000000..4b8c441cb
--- /dev/null
+++ b/drivers/video/exynos_mipi_dsi_lowlevel.h
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ *
+ * Author: InKi Dae <inki.dae@samsung.com>
+ * Author: Donghwa Lee <dh09.lee@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _EXYNOS_MIPI_DSI_LOWLEVEL_H
+#define _EXYNOS_MIPI_DSI_LOWLEVEL_H
+
+void exynos_mipi_dsi_register(struct mipi_dsim_device *dsim);
+void exynos_mipi_dsi_func_reset(struct mipi_dsim_device *dsim);
+void exynos_mipi_dsi_sw_reset(struct mipi_dsim_device *dsim);
+void exynos_mipi_dsi_sw_release(struct mipi_dsim_device *dsim);
+void exynos_mipi_dsi_set_interrupt_mask(struct mipi_dsim_device *dsim,
+	unsigned int mode, unsigned int mask);
+void exynos_mipi_dsi_set_data_lane_number(struct mipi_dsim_device *dsim,
+					unsigned int count);
+void exynos_mipi_dsi_init_fifo_pointer(struct mipi_dsim_device *dsim,
+					unsigned int cfg);
+void exynos_mipi_dsi_set_phy_tunning(struct mipi_dsim_device *dsim,
+				unsigned int value);
+void exynos_mipi_dsi_set_phy_tunning(struct mipi_dsim_device *dsim,
+				unsigned int value);
+void exynos_mipi_dsi_set_main_disp_resol(struct mipi_dsim_device *dsim,
+		unsigned int width_resol, unsigned int height_resol);
+void exynos_mipi_dsi_set_main_disp_vporch(struct mipi_dsim_device *dsim,
+	unsigned int cmd_allow, unsigned int vfront, unsigned int vback);
+void exynos_mipi_dsi_set_main_disp_hporch(struct mipi_dsim_device *dsim,
+			unsigned int front, unsigned int back);
+void exynos_mipi_dsi_set_main_disp_sync_area(struct mipi_dsim_device *dsim,
+				unsigned int vert, unsigned int hori);
+void exynos_mipi_dsi_set_sub_disp_resol(struct mipi_dsim_device *dsim,
+				unsigned int vert, unsigned int hori);
+void exynos_mipi_dsi_init_config(struct mipi_dsim_device *dsim);
+void exynos_mipi_dsi_display_config(struct mipi_dsim_device *dsim,
+				struct mipi_dsim_config *dsim_config);
+void exynos_mipi_dsi_set_data_lane_number(struct mipi_dsim_device *dsim,
+				unsigned int count);
+void exynos_mipi_dsi_enable_lane(struct mipi_dsim_device *dsim,
+			unsigned int lane, unsigned int enable);
+void exynos_mipi_dsi_enable_afc(struct mipi_dsim_device *dsim,
+			unsigned int enable, unsigned int afc_code);
+void exynos_mipi_dsi_enable_pll_bypass(struct mipi_dsim_device *dsim,
+				unsigned int enable);
+void exynos_mipi_dsi_pll_freq_band(struct mipi_dsim_device *dsim,
+				unsigned int freq_band);
+void exynos_mipi_dsi_pll_freq(struct mipi_dsim_device *dsim,
+			unsigned int pre_divider, unsigned int main_divider,
+			unsigned int scaler);
+void exynos_mipi_dsi_pll_stable_time(struct mipi_dsim_device *dsim,
+			unsigned int lock_time);
+void exynos_mipi_dsi_enable_pll(struct mipi_dsim_device *dsim,
+					unsigned int enable);
+void exynos_mipi_dsi_set_byte_clock_src(struct mipi_dsim_device *dsim,
+					unsigned int src);
+void exynos_mipi_dsi_enable_byte_clock(struct mipi_dsim_device *dsim,
+					unsigned int enable);
+void exynos_mipi_dsi_set_esc_clk_prs(struct mipi_dsim_device *dsim,
+				unsigned int enable, unsigned int prs_val);
+void exynos_mipi_dsi_enable_esc_clk_on_lane(struct mipi_dsim_device *dsim,
+				unsigned int lane_sel, unsigned int enable);
+void exynos_mipi_dsi_force_dphy_stop_state(struct mipi_dsim_device *dsim,
+				unsigned int enable);
+unsigned int exynos_mipi_dsi_is_lane_state(struct mipi_dsim_device *dsim);
+void exynos_mipi_dsi_set_stop_state_counter(struct mipi_dsim_device *dsim,
+				unsigned int cnt_val);
+void exynos_mipi_dsi_set_bta_timeout(struct mipi_dsim_device *dsim,
+				unsigned int timeout);
+void exynos_mipi_dsi_set_lpdr_timeout(struct mipi_dsim_device *dsim,
+				unsigned int timeout);
+void exynos_mipi_dsi_set_lcdc_transfer_mode(struct mipi_dsim_device *dsim,
+					unsigned int lp);
+void exynos_mipi_dsi_set_cpu_transfer_mode(struct mipi_dsim_device *dsim,
+					unsigned int lp);
+void exynos_mipi_dsi_enable_hs_clock(struct mipi_dsim_device *dsim,
+				unsigned int enable);
+void exynos_mipi_dsi_dp_dn_swap(struct mipi_dsim_device *dsim,
+				unsigned int swap_en);
+void exynos_mipi_dsi_hs_zero_ctrl(struct mipi_dsim_device *dsim,
+				unsigned int hs_zero);
+void exynos_mipi_dsi_prep_ctrl(struct mipi_dsim_device *dsim,
+				unsigned int prep);
+void exynos_mipi_dsi_clear_interrupt(struct mipi_dsim_device *dsim);
+void exynos_mipi_dsi_clear_all_interrupt(struct mipi_dsim_device *dsim);
+unsigned int exynos_mipi_dsi_is_pll_stable(struct mipi_dsim_device *dsim);
+unsigned int exynos_mipi_dsi_get_fifo_state(struct mipi_dsim_device *dsim);
+unsigned int _exynos_mipi_dsi_get_frame_done_status(struct mipi_dsim_device
+						*dsim);
+void _exynos_mipi_dsi_clear_frame_done(struct mipi_dsim_device *dsim);
+void exynos_mipi_dsi_wr_tx_header(struct mipi_dsim_device *dsim,
+		unsigned int di, unsigned int data0, unsigned int data1);
+void exynos_mipi_dsi_wr_tx_data(struct mipi_dsim_device *dsim,
+		unsigned int tx_data);
+
+#endif /* _EXYNOS_MIPI_DSI_LOWLEVEL_H */