/*
 * Copyright © 2010 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * Authors:
 * jim liu <jim.liu@intel.com>
 * Jackie Li<yaodong.li@intel.com>
 */

#include <linux/delay.h>

#include "mdfld_dsi_dpi.h"
#include "mdfld_dsi_pkg_sender.h"
#include "mdfld_output.h"
#include "psb_drv.h"
#include "tc35876x-dsi-lvds.h"

static void mdfld_dsi_dpi_shut_down(struct mdfld_dsi_dpi_output *output,
								int pipe);

static void mdfld_wait_for_HS_DATA_FIFO(struct drm_device *dev, u32 pipe)
{
	u32 gen_fifo_stat_reg = MIPI_GEN_FIFO_STAT_REG(pipe);
	int timeout = 0;

	udelay(500);

	/* This will time out after approximately 2+ seconds */
	while ((timeout < 20000) &&
		(REG_READ(gen_fifo_stat_reg) & DSI_FIFO_GEN_HS_DATA_FULL)) {
		udelay(100);
		timeout++;
	}

	if (timeout == 20000)
		DRM_INFO("MIPI: HS Data FIFO was never cleared!\n");
}

static void mdfld_wait_for_HS_CTRL_FIFO(struct drm_device *dev, u32 pipe)
{
	u32 gen_fifo_stat_reg = MIPI_GEN_FIFO_STAT_REG(pipe);
	int timeout = 0;

	udelay(500);

	/* This will time out after approximately 2+ seconds */
	while ((timeout < 20000) && (REG_READ(gen_fifo_stat_reg)
					& DSI_FIFO_GEN_HS_CTRL_FULL)) {
		udelay(100);
		timeout++;
	}
	if (timeout == 20000)
		DRM_INFO("MIPI: HS CMD FIFO was never cleared!\n");
}

static void mdfld_wait_for_DPI_CTRL_FIFO(struct drm_device *dev, u32 pipe)
{
	u32 gen_fifo_stat_reg = MIPI_GEN_FIFO_STAT_REG(pipe);
	int timeout = 0;

	udelay(500);

	/* This will time out after approximately 2+ seconds */
	while ((timeout < 20000) && ((REG_READ(gen_fifo_stat_reg) &
					DPI_FIFO_EMPTY) != DPI_FIFO_EMPTY)) {
		udelay(100);
		timeout++;
	}

	if (timeout == 20000)
		DRM_ERROR("MIPI: DPI FIFO was never cleared\n");
}

static void mdfld_wait_for_SPL_PKG_SENT(struct drm_device *dev, u32 pipe)
{
	u32 intr_stat_reg = MIPI_INTR_STAT_REG(pipe);
	int timeout = 0;

	udelay(500);

	/* This will time out after approximately 2+ seconds */
	while ((timeout < 20000) && (!(REG_READ(intr_stat_reg)
					& DSI_INTR_STATE_SPL_PKG_SENT))) {
		udelay(100);
		timeout++;
	}

	if (timeout == 20000)
                DRM_ERROR("MIPI: SPL_PKT_SENT_INTERRUPT was not sent successfully!\n");
}

/* For TC35876X */

static void dsi_set_device_ready_state(struct drm_device *dev, int state,
				int pipe)
{
	REG_FLD_MOD(MIPI_DEVICE_READY_REG(pipe), !!state, 0, 0);
}

static void dsi_set_pipe_plane_enable_state(struct drm_device *dev,
							int state, int pipe)
{
	struct drm_psb_private *dev_priv = dev->dev_private;
	u32 pipeconf_reg = PIPEACONF;
	u32 dspcntr_reg = DSPACNTR;

	u32 dspcntr = dev_priv->dspcntr[pipe];
	u32 mipi = MIPI_PORT_EN | PASS_FROM_SPHY_TO_AFE | SEL_FLOPPED_HSTX;

	if (pipe) {
		pipeconf_reg = PIPECCONF;
		dspcntr_reg = DSPCCNTR;
	} else
		mipi &= (~0x03);

	if (state) {
		/*Set up pipe */
		REG_WRITE(pipeconf_reg, BIT(31));

		if (REG_BIT_WAIT(pipeconf_reg, 1, 30))
			dev_err(&dev->pdev->dev, "%s: Pipe enable timeout\n",
				__func__);

		/*Set up display plane */
		REG_WRITE(dspcntr_reg, dspcntr);
	} else {
		u32 dspbase_reg = pipe ? MDFLD_DSPCBASE : MRST_DSPABASE;

		/* Put DSI lanes to ULPS to disable pipe */
		REG_FLD_MOD(MIPI_DEVICE_READY_REG(pipe), 2, 2, 1);
		REG_READ(MIPI_DEVICE_READY_REG(pipe)); /* posted write? */

		/* LP Hold */
		REG_FLD_MOD(MIPI_PORT_CONTROL(pipe), 0, 16, 16);
		REG_READ(MIPI_PORT_CONTROL(pipe)); /* posted write? */

		/* Disable display plane */
		REG_FLD_MOD(dspcntr_reg, 0, 31, 31);

		/* Flush the plane changes ??? posted write? */
		REG_WRITE(dspbase_reg, REG_READ(dspbase_reg));
		REG_READ(dspbase_reg);

		/* Disable PIPE */
		REG_FLD_MOD(pipeconf_reg, 0, 31, 31);

		if (REG_BIT_WAIT(pipeconf_reg, 0, 30))
			dev_err(&dev->pdev->dev, "%s: Pipe disable timeout\n",
				__func__);

		if (REG_BIT_WAIT(MIPI_GEN_FIFO_STAT_REG(pipe), 1, 28))
			dev_err(&dev->pdev->dev, "%s: FIFO not empty\n",
				__func__);
	}
}

static void mdfld_dsi_configure_down(struct mdfld_dsi_encoder *dsi_encoder,
								int pipe)
{
	struct mdfld_dsi_dpi_output *dpi_output =
				MDFLD_DSI_DPI_OUTPUT(dsi_encoder);
	struct mdfld_dsi_config *dsi_config =
				mdfld_dsi_encoder_get_config(dsi_encoder);
	struct drm_device *dev = dsi_config->dev;
	struct drm_psb_private *dev_priv = dev->dev_private;

	if (!dev_priv->dpi_panel_on[pipe]) {
		dev_err(dev->dev, "DPI panel is already off\n");
		return;
	}
	tc35876x_toshiba_bridge_panel_off(dev);
	tc35876x_set_bridge_reset_state(dev, 1);
	dsi_set_pipe_plane_enable_state(dev, 0, pipe);
	mdfld_dsi_dpi_shut_down(dpi_output, pipe);
	dsi_set_device_ready_state(dev, 0, pipe);
}

static void mdfld_dsi_configure_up(struct mdfld_dsi_encoder *dsi_encoder,
								int pipe)
{
	struct mdfld_dsi_dpi_output *dpi_output =
				MDFLD_DSI_DPI_OUTPUT(dsi_encoder);
	struct mdfld_dsi_config *dsi_config =
				mdfld_dsi_encoder_get_config(dsi_encoder);
	struct drm_device *dev = dsi_config->dev;
	struct drm_psb_private *dev_priv = dev->dev_private;

	if (dev_priv->dpi_panel_on[pipe]) {
		dev_err(dev->dev, "DPI panel is already on\n");
		return;
	}

	/* For resume path sequence */
	mdfld_dsi_dpi_shut_down(dpi_output, pipe);
	dsi_set_device_ready_state(dev, 0, pipe);

	dsi_set_device_ready_state(dev, 1, pipe);
	tc35876x_set_bridge_reset_state(dev, 0);
	tc35876x_configure_lvds_bridge(dev);
	mdfld_dsi_dpi_turn_on(dpi_output, pipe);  /* Send turn on command */
	dsi_set_pipe_plane_enable_state(dev, 1, pipe);
}
/* End for TC35876X */

/* ************************************************************************* *\
 * FUNCTION: mdfld_dsi_tpo_ic_init
 *
 * DESCRIPTION:  This function is called only by mrst_dsi_mode_set and
 *               restore_display_registers.  since this function does not
 *               acquire the mutex, it is important that the calling function
 *               does!
\* ************************************************************************* */
static void mdfld_dsi_tpo_ic_init(struct mdfld_dsi_config *dsi_config, u32 pipe)
{
	struct drm_device *dev = dsi_config->dev;
	u32 dcsChannelNumber = dsi_config->channel_num;
	u32 gen_data_reg = MIPI_HS_GEN_DATA_REG(pipe);
	u32 gen_ctrl_reg = MIPI_HS_GEN_CTRL_REG(pipe);
	u32 gen_ctrl_val = GEN_LONG_WRITE;

	DRM_INFO("Enter mrst init TPO MIPI display.\n");

	gen_ctrl_val |= dcsChannelNumber << DCS_CHANNEL_NUMBER_POS;

	/* Flip page order */
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x00008036);
	mdfld_wait_for_HS_CTRL_FIFO(dev, pipe);
	REG_WRITE(gen_ctrl_reg, gen_ctrl_val | (0x02 << WORD_COUNTS_POS));

	/* 0xF0 */
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x005a5af0);
	mdfld_wait_for_HS_CTRL_FIFO(dev, pipe);
	REG_WRITE(gen_ctrl_reg, gen_ctrl_val | (0x03 << WORD_COUNTS_POS));

	/* Write protection key */
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x005a5af1);
	mdfld_wait_for_HS_CTRL_FIFO(dev, pipe);
	REG_WRITE(gen_ctrl_reg, gen_ctrl_val | (0x03 << WORD_COUNTS_POS));

	/* 0xFC */
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x005a5afc);
	mdfld_wait_for_HS_CTRL_FIFO(dev, pipe);
	REG_WRITE(gen_ctrl_reg, gen_ctrl_val | (0x03 << WORD_COUNTS_POS));

	/* 0xB7 */
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x770000b7);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x00000044);
	mdfld_wait_for_HS_CTRL_FIFO(dev, pipe);
	REG_WRITE(gen_ctrl_reg, gen_ctrl_val | (0x05 << WORD_COUNTS_POS));

	/* 0xB6 */
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x000a0ab6);
	mdfld_wait_for_HS_CTRL_FIFO(dev, pipe);
	REG_WRITE(gen_ctrl_reg, gen_ctrl_val | (0x03 << WORD_COUNTS_POS));

	/* 0xF2 */
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x081010f2);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x4a070708);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x000000c5);
	mdfld_wait_for_HS_CTRL_FIFO(dev, pipe);
	REG_WRITE(gen_ctrl_reg, gen_ctrl_val | (0x09 << WORD_COUNTS_POS));

	/* 0xF8 */
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x024003f8);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x01030a04);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x0e020220);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x00000004);
	mdfld_wait_for_HS_CTRL_FIFO(dev, pipe);
	REG_WRITE(gen_ctrl_reg, gen_ctrl_val | (0x0d << WORD_COUNTS_POS));

	/* 0xE2 */
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x398fc3e2);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x0000916f);
	mdfld_wait_for_HS_CTRL_FIFO(dev, pipe);
	REG_WRITE(gen_ctrl_reg, gen_ctrl_val | (0x06 << WORD_COUNTS_POS));

	/* 0xB0 */
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x000000b0);
	mdfld_wait_for_HS_CTRL_FIFO(dev, pipe);
	REG_WRITE(gen_ctrl_reg, gen_ctrl_val | (0x02 << WORD_COUNTS_POS));

	/* 0xF4 */
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x240242f4);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x78ee2002);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x2a071050);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x507fee10);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x10300710);
	mdfld_wait_for_HS_CTRL_FIFO(dev, pipe);
	REG_WRITE(gen_ctrl_reg, gen_ctrl_val | (0x14 << WORD_COUNTS_POS));

	/* 0xBA */
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x19fe07ba);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x101c0a31);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x00000010);
	mdfld_wait_for_HS_CTRL_FIFO(dev, pipe);
	REG_WRITE(gen_ctrl_reg, gen_ctrl_val | (0x09 << WORD_COUNTS_POS));

	/* 0xBB */
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x28ff07bb);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x24280a31);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x00000034);
	mdfld_wait_for_HS_CTRL_FIFO(dev, pipe);
	REG_WRITE(gen_ctrl_reg, gen_ctrl_val | (0x09 << WORD_COUNTS_POS));

	/* 0xFB */
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x535d05fb);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x1b1a2130);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x221e180e);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x131d2120);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x535d0508);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x1c1a2131);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x231f160d);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x111b2220);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x535c2008);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x1f1d2433);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x2c251a10);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x2c34372d);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x00000023);
	mdfld_wait_for_HS_CTRL_FIFO(dev, pipe);
	REG_WRITE(gen_ctrl_reg, gen_ctrl_val | (0x31 << WORD_COUNTS_POS));

	/* 0xFA */
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x525c0bfa);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x1c1c232f);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x2623190e);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x18212625);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x545d0d0e);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x1e1d2333);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x26231a10);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x1a222725);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x545d280f);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x21202635);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x31292013);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x31393d33);
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x00000029);
	mdfld_wait_for_HS_CTRL_FIFO(dev, pipe);
	REG_WRITE(gen_ctrl_reg, gen_ctrl_val | (0x31 << WORD_COUNTS_POS));

	/* Set DM */
	mdfld_wait_for_HS_DATA_FIFO(dev, pipe);
	REG_WRITE(gen_data_reg, 0x000100f7);
	mdfld_wait_for_HS_CTRL_FIFO(dev, pipe);
	REG_WRITE(gen_ctrl_reg, gen_ctrl_val | (0x03 << WORD_COUNTS_POS));
}

static u16 mdfld_dsi_dpi_to_byte_clock_count(int pixel_clock_count,
						int num_lane, int bpp)
{
	return (u16)((pixel_clock_count * bpp) / (num_lane * 8));
}

/*
 * Calculate the dpi time basing on a given drm mode @mode
 * return 0 on success.
 * FIXME: I was using proposed mode value for calculation, may need to
 * use crtc mode values later
 */
int mdfld_dsi_dpi_timing_calculation(struct drm_display_mode *mode,
				struct mdfld_dsi_dpi_timing *dpi_timing,
				int num_lane, int bpp)
{
	int pclk_hsync, pclk_hfp, pclk_hbp, pclk_hactive;
	int pclk_vsync, pclk_vfp, pclk_vbp;

	pclk_hactive = mode->hdisplay;
	pclk_hfp = mode->hsync_start - mode->hdisplay;
	pclk_hsync = mode->hsync_end - mode->hsync_start;
	pclk_hbp = mode->htotal - mode->hsync_end;

	pclk_vfp = mode->vsync_start - mode->vdisplay;
	pclk_vsync = mode->vsync_end - mode->vsync_start;
	pclk_vbp = mode->vtotal - mode->vsync_end;

	/*
	 * byte clock counts were calculated by following formula
	 * bclock_count = pclk_count * bpp / num_lane / 8
	 */
	dpi_timing->hsync_count = mdfld_dsi_dpi_to_byte_clock_count(
						pclk_hsync, num_lane, bpp);
	dpi_timing->hbp_count = mdfld_dsi_dpi_to_byte_clock_count(
						pclk_hbp, num_lane, bpp);
	dpi_timing->hfp_count = mdfld_dsi_dpi_to_byte_clock_count(
						pclk_hfp, num_lane, bpp);
	dpi_timing->hactive_count = mdfld_dsi_dpi_to_byte_clock_count(
						pclk_hactive, num_lane, bpp);
	dpi_timing->vsync_count = mdfld_dsi_dpi_to_byte_clock_count(
						pclk_vsync, num_lane, bpp);
	dpi_timing->vbp_count = mdfld_dsi_dpi_to_byte_clock_count(
						pclk_vbp, num_lane, bpp);
	dpi_timing->vfp_count = mdfld_dsi_dpi_to_byte_clock_count(
						pclk_vfp, num_lane, bpp);

	return 0;
}

void mdfld_dsi_dpi_controller_init(struct mdfld_dsi_config *dsi_config,
								int pipe)
{
	struct drm_device *dev = dsi_config->dev;
	int lane_count = dsi_config->lane_count;
	struct mdfld_dsi_dpi_timing dpi_timing;
	struct drm_display_mode *mode = dsi_config->mode;
	u32 val;

	/*un-ready device*/
	REG_FLD_MOD(MIPI_DEVICE_READY_REG(pipe), 0, 0, 0);

	/*init dsi adapter before kicking off*/
	REG_WRITE(MIPI_CTRL_REG(pipe), 0x00000018);

	/*enable all interrupts*/
	REG_WRITE(MIPI_INTR_EN_REG(pipe), 0xffffffff);

	/*set up func_prg*/
	val = lane_count;
	val |= dsi_config->channel_num << DSI_DPI_VIRT_CHANNEL_OFFSET;

	switch (dsi_config->bpp) {
	case 16:
		val |= DSI_DPI_COLOR_FORMAT_RGB565;
		break;
	case 18:
		val |= DSI_DPI_COLOR_FORMAT_RGB666;
		break;
	case 24:
		val |= DSI_DPI_COLOR_FORMAT_RGB888;
		break;
	default:
		DRM_ERROR("unsupported color format, bpp = %d\n",
							dsi_config->bpp);
	}
	REG_WRITE(MIPI_DSI_FUNC_PRG_REG(pipe), val);

	REG_WRITE(MIPI_HS_TX_TIMEOUT_REG(pipe),
			(mode->vtotal * mode->htotal * dsi_config->bpp /
				(8 * lane_count)) & DSI_HS_TX_TIMEOUT_MASK);
	REG_WRITE(MIPI_LP_RX_TIMEOUT_REG(pipe),
				0xffff & DSI_LP_RX_TIMEOUT_MASK);

	/*max value: 20 clock cycles of txclkesc*/
	REG_WRITE(MIPI_TURN_AROUND_TIMEOUT_REG(pipe),
				0x14 & DSI_TURN_AROUND_TIMEOUT_MASK);

	/*min 21 txclkesc, max: ffffh*/
	REG_WRITE(MIPI_DEVICE_RESET_TIMER_REG(pipe),
				0xffff & DSI_RESET_TIMER_MASK);

	REG_WRITE(MIPI_DPI_RESOLUTION_REG(pipe),
				mode->vdisplay << 16 | mode->hdisplay);

	/*set DPI timing registers*/
	mdfld_dsi_dpi_timing_calculation(mode, &dpi_timing,
				dsi_config->lane_count, dsi_config->bpp);

	REG_WRITE(MIPI_HSYNC_COUNT_REG(pipe),
			dpi_timing.hsync_count & DSI_DPI_TIMING_MASK);
	REG_WRITE(MIPI_HBP_COUNT_REG(pipe),
			dpi_timing.hbp_count & DSI_DPI_TIMING_MASK);
	REG_WRITE(MIPI_HFP_COUNT_REG(pipe),
			dpi_timing.hfp_count & DSI_DPI_TIMING_MASK);
	REG_WRITE(MIPI_HACTIVE_COUNT_REG(pipe),
			dpi_timing.hactive_count & DSI_DPI_TIMING_MASK);
	REG_WRITE(MIPI_VSYNC_COUNT_REG(pipe),
			dpi_timing.vsync_count & DSI_DPI_TIMING_MASK);
	REG_WRITE(MIPI_VBP_COUNT_REG(pipe),
			dpi_timing.vbp_count & DSI_DPI_TIMING_MASK);
	REG_WRITE(MIPI_VFP_COUNT_REG(pipe),
			dpi_timing.vfp_count & DSI_DPI_TIMING_MASK);

	REG_WRITE(MIPI_HIGH_LOW_SWITCH_COUNT_REG(pipe), 0x46);

	/*min: 7d0 max: 4e20*/
	REG_WRITE(MIPI_INIT_COUNT_REG(pipe), 0x000007d0);

	/*set up video mode*/
	val = dsi_config->video_mode | DSI_DPI_COMPLETE_LAST_LINE;
	REG_WRITE(MIPI_VIDEO_MODE_FORMAT_REG(pipe), val);

	REG_WRITE(MIPI_EOT_DISABLE_REG(pipe), 0x00000000);

	REG_WRITE(MIPI_LP_BYTECLK_REG(pipe), 0x00000004);

	/*TODO: figure out how to setup these registers*/
	if (mdfld_get_panel_type(dev, pipe) == TC35876X)
		REG_WRITE(MIPI_DPHY_PARAM_REG(pipe), 0x2A0c6008);
	else
		REG_WRITE(MIPI_DPHY_PARAM_REG(pipe), 0x150c3408);

	REG_WRITE(MIPI_CLK_LANE_SWITCH_TIME_CNT_REG(pipe), (0xa << 16) | 0x14);

	if (mdfld_get_panel_type(dev, pipe) == TC35876X)
		tc35876x_set_bridge_reset_state(dev, 0);  /*Pull High Reset */

	/*set device ready*/
	REG_FLD_MOD(MIPI_DEVICE_READY_REG(pipe), 1, 0, 0);
}

void mdfld_dsi_dpi_turn_on(struct mdfld_dsi_dpi_output *output, int pipe)
{
	struct drm_device *dev = output->dev;

	/* clear special packet sent bit */
	if (REG_READ(MIPI_INTR_STAT_REG(pipe)) & DSI_INTR_STATE_SPL_PKG_SENT)
		REG_WRITE(MIPI_INTR_STAT_REG(pipe),
					DSI_INTR_STATE_SPL_PKG_SENT);

	/*send turn on package*/
	REG_WRITE(MIPI_DPI_CONTROL_REG(pipe), DSI_DPI_CTRL_HS_TURN_ON);

	/*wait for SPL_PKG_SENT interrupt*/
	mdfld_wait_for_SPL_PKG_SENT(dev, pipe);

	if (REG_READ(MIPI_INTR_STAT_REG(pipe)) & DSI_INTR_STATE_SPL_PKG_SENT)
		REG_WRITE(MIPI_INTR_STAT_REG(pipe),
					DSI_INTR_STATE_SPL_PKG_SENT);

	output->panel_on = 1;

	/* FIXME the following is disabled to WA the X slow start issue
	   for TMD panel
	if (pipe == 2)
		dev_priv->dpi_panel_on2 = true;
	else if (pipe == 0)
		dev_priv->dpi_panel_on = true; */
}

static void mdfld_dsi_dpi_shut_down(struct mdfld_dsi_dpi_output *output,
								int pipe)
{
	struct drm_device *dev = output->dev;

	/*if output is on, or mode setting didn't happen, ignore this*/
	if ((!output->panel_on) || output->first_boot) {
		output->first_boot = 0;
		return;
	}

	/* Wait for dpi fifo to empty */
	mdfld_wait_for_DPI_CTRL_FIFO(dev, pipe);

	/* Clear the special packet interrupt bit if set */
	if (REG_READ(MIPI_INTR_STAT_REG(pipe)) & DSI_INTR_STATE_SPL_PKG_SENT)
		REG_WRITE(MIPI_INTR_STAT_REG(pipe),
					DSI_INTR_STATE_SPL_PKG_SENT);

	if (REG_READ(MIPI_DPI_CONTROL_REG(pipe)) == DSI_DPI_CTRL_HS_SHUTDOWN)
		goto shutdown_out;

	REG_WRITE(MIPI_DPI_CONTROL_REG(pipe), DSI_DPI_CTRL_HS_SHUTDOWN);

shutdown_out:
	output->panel_on = 0;
	output->first_boot = 0;

	/* FIXME the following is disabled to WA the X slow start issue
	   for TMD panel
	if (pipe == 2)
		dev_priv->dpi_panel_on2 = false;
	else if (pipe == 0)
		dev_priv->dpi_panel_on = false;	 */
}

static void mdfld_dsi_dpi_set_power(struct drm_encoder *encoder, bool on)
{
	struct mdfld_dsi_encoder *dsi_encoder = mdfld_dsi_encoder(encoder);
	struct mdfld_dsi_dpi_output *dpi_output =
				MDFLD_DSI_DPI_OUTPUT(dsi_encoder);
	struct mdfld_dsi_config *dsi_config =
				mdfld_dsi_encoder_get_config(dsi_encoder);
	int pipe = mdfld_dsi_encoder_get_pipe(dsi_encoder);
	struct drm_device *dev = dsi_config->dev;
	struct drm_psb_private *dev_priv = dev->dev_private;

	/*start up display island if it was shutdown*/
	if (!gma_power_begin(dev, true))
		return;

	if (on) {
		if (mdfld_get_panel_type(dev, pipe) == TMD_VID)
			mdfld_dsi_dpi_turn_on(dpi_output, pipe);
		else if (mdfld_get_panel_type(dev, pipe) == TC35876X)
			mdfld_dsi_configure_up(dsi_encoder, pipe);
		else {
			/*enable mipi port*/
			REG_WRITE(MIPI_PORT_CONTROL(pipe),
				REG_READ(MIPI_PORT_CONTROL(pipe)) | BIT(31));
			REG_READ(MIPI_PORT_CONTROL(pipe));

			mdfld_dsi_dpi_turn_on(dpi_output, pipe);
			mdfld_dsi_tpo_ic_init(dsi_config, pipe);
		}
		dev_priv->dpi_panel_on[pipe] = true;
	} else {
		if (mdfld_get_panel_type(dev, pipe) == TMD_VID)
			mdfld_dsi_dpi_shut_down(dpi_output, pipe);
		else if (mdfld_get_panel_type(dev, pipe) == TC35876X)
			mdfld_dsi_configure_down(dsi_encoder, pipe);
		else {
			mdfld_dsi_dpi_shut_down(dpi_output, pipe);

			/*disable mipi port*/
			REG_WRITE(MIPI_PORT_CONTROL(pipe),
				REG_READ(MIPI_PORT_CONTROL(pipe)) & ~BIT(31));
			REG_READ(MIPI_PORT_CONTROL(pipe));
		}
		dev_priv->dpi_panel_on[pipe] = false;
	}
	gma_power_end(dev);
}

void mdfld_dsi_dpi_dpms(struct drm_encoder *encoder, int mode)
{
	mdfld_dsi_dpi_set_power(encoder, mode == DRM_MODE_DPMS_ON);
}

bool mdfld_dsi_dpi_mode_fixup(struct drm_encoder *encoder,
				     const struct drm_display_mode *mode,
				     struct drm_display_mode *adjusted_mode)
{
	struct mdfld_dsi_encoder *dsi_encoder = mdfld_dsi_encoder(encoder);
	struct mdfld_dsi_config *dsi_config =
				mdfld_dsi_encoder_get_config(dsi_encoder);
	struct drm_display_mode *fixed_mode = dsi_config->fixed_mode;

	if (fixed_mode) {
		adjusted_mode->hdisplay = fixed_mode->hdisplay;
		adjusted_mode->hsync_start = fixed_mode->hsync_start;
		adjusted_mode->hsync_end = fixed_mode->hsync_end;
		adjusted_mode->htotal = fixed_mode->htotal;
		adjusted_mode->vdisplay = fixed_mode->vdisplay;
		adjusted_mode->vsync_start = fixed_mode->vsync_start;
		adjusted_mode->vsync_end = fixed_mode->vsync_end;
		adjusted_mode->vtotal = fixed_mode->vtotal;
		adjusted_mode->clock = fixed_mode->clock;
		drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);
	}
	return true;
}

void mdfld_dsi_dpi_prepare(struct drm_encoder *encoder)
{
	mdfld_dsi_dpi_set_power(encoder, false);
}

void mdfld_dsi_dpi_commit(struct drm_encoder *encoder)
{
	mdfld_dsi_dpi_set_power(encoder, true);
}

/* For TC35876X */
/* This functionality was implemented in FW in iCDK */
/* But removed in DV0 and later. So need to add here. */
static void mipi_set_properties(struct mdfld_dsi_config *dsi_config, int pipe)
{
	struct drm_device *dev = dsi_config->dev;

	REG_WRITE(MIPI_CTRL_REG(pipe), 0x00000018);
	REG_WRITE(MIPI_INTR_EN_REG(pipe), 0xffffffff);
	REG_WRITE(MIPI_HS_TX_TIMEOUT_REG(pipe), 0xffffff);
	REG_WRITE(MIPI_LP_RX_TIMEOUT_REG(pipe), 0xffffff);
	REG_WRITE(MIPI_TURN_AROUND_TIMEOUT_REG(pipe), 0x14);
	REG_WRITE(MIPI_DEVICE_RESET_TIMER_REG(pipe), 0xff);
	REG_WRITE(MIPI_HIGH_LOW_SWITCH_COUNT_REG(pipe), 0x25);
	REG_WRITE(MIPI_INIT_COUNT_REG(pipe), 0xf0);
	REG_WRITE(MIPI_EOT_DISABLE_REG(pipe), 0x00000000);
	REG_WRITE(MIPI_LP_BYTECLK_REG(pipe), 0x00000004);
	REG_WRITE(MIPI_DBI_BW_CTRL_REG(pipe), 0x00000820);
	REG_WRITE(MIPI_CLK_LANE_SWITCH_TIME_CNT_REG(pipe), (0xa << 16) | 0x14);
}

static void mdfld_mipi_set_video_timing(struct mdfld_dsi_config *dsi_config,
					int pipe)
{
	struct drm_device *dev = dsi_config->dev;
	struct mdfld_dsi_dpi_timing dpi_timing;
	struct drm_display_mode *mode = dsi_config->mode;

	mdfld_dsi_dpi_timing_calculation(mode, &dpi_timing,
					dsi_config->lane_count,
					dsi_config->bpp);

	REG_WRITE(MIPI_DPI_RESOLUTION_REG(pipe),
		mode->vdisplay << 16 | mode->hdisplay);
	REG_WRITE(MIPI_HSYNC_COUNT_REG(pipe),
		dpi_timing.hsync_count & DSI_DPI_TIMING_MASK);
	REG_WRITE(MIPI_HBP_COUNT_REG(pipe),
		dpi_timing.hbp_count & DSI_DPI_TIMING_MASK);
	REG_WRITE(MIPI_HFP_COUNT_REG(pipe),
		dpi_timing.hfp_count & DSI_DPI_TIMING_MASK);
	REG_WRITE(MIPI_HACTIVE_COUNT_REG(pipe),
		dpi_timing.hactive_count & DSI_DPI_TIMING_MASK);
	REG_WRITE(MIPI_VSYNC_COUNT_REG(pipe),
		dpi_timing.vsync_count & DSI_DPI_TIMING_MASK);
	REG_WRITE(MIPI_VBP_COUNT_REG(pipe),
		dpi_timing.vbp_count & DSI_DPI_TIMING_MASK);
	REG_WRITE(MIPI_VFP_COUNT_REG(pipe),
		dpi_timing.vfp_count & DSI_DPI_TIMING_MASK);
}

static void mdfld_mipi_config(struct mdfld_dsi_config *dsi_config, int pipe)
{
	struct drm_device *dev = dsi_config->dev;
	int lane_count = dsi_config->lane_count;

	if (pipe) {
		REG_WRITE(MIPI_PORT_CONTROL(0), 0x00000002);
		REG_WRITE(MIPI_PORT_CONTROL(2), 0x80000000);
	} else {
		REG_WRITE(MIPI_PORT_CONTROL(0), 0x80010000);
		REG_WRITE(MIPI_PORT_CONTROL(2), 0x00);
	}

	REG_WRITE(MIPI_DPHY_PARAM_REG(pipe), 0x150A600F);
	REG_WRITE(MIPI_VIDEO_MODE_FORMAT_REG(pipe), 0x0000000F);

	/* lane_count = 3 */
	REG_WRITE(MIPI_DSI_FUNC_PRG_REG(pipe), 0x00000200 | lane_count);

	mdfld_mipi_set_video_timing(dsi_config, pipe);
}

static void mdfld_set_pipe_timing(struct mdfld_dsi_config *dsi_config, int pipe)
{
	struct drm_device *dev = dsi_config->dev;
	struct drm_display_mode *mode = dsi_config->mode;

	REG_WRITE(HTOTAL_A, ((mode->htotal - 1) << 16) | (mode->hdisplay - 1));
	REG_WRITE(HBLANK_A, ((mode->htotal - 1) << 16) | (mode->hdisplay - 1));
	REG_WRITE(HSYNC_A,
		((mode->hsync_end - 1) << 16) | (mode->hsync_start - 1));

	REG_WRITE(VTOTAL_A, ((mode->vtotal - 1) << 16) | (mode->vdisplay - 1));
	REG_WRITE(VBLANK_A, ((mode->vtotal - 1) << 16) | (mode->vdisplay - 1));
	REG_WRITE(VSYNC_A,
		((mode->vsync_end - 1) << 16) | (mode->vsync_start - 1));

	REG_WRITE(PIPEASRC,
		((mode->hdisplay - 1) << 16) | (mode->vdisplay - 1));
}
/* End for TC35876X */

void mdfld_dsi_dpi_mode_set(struct drm_encoder *encoder,
				   struct drm_display_mode *mode,
				   struct drm_display_mode *adjusted_mode)
{
	struct mdfld_dsi_encoder *dsi_encoder = mdfld_dsi_encoder(encoder);
	struct mdfld_dsi_dpi_output *dpi_output =
					MDFLD_DSI_DPI_OUTPUT(dsi_encoder);
	struct mdfld_dsi_config *dsi_config =
				mdfld_dsi_encoder_get_config(dsi_encoder);
	struct drm_device *dev = dsi_config->dev;
	struct drm_psb_private *dev_priv = dev->dev_private;
	int pipe = mdfld_dsi_encoder_get_pipe(dsi_encoder);
	u32 pipeconf_reg = PIPEACONF;
	u32 dspcntr_reg = DSPACNTR;
	u32 pipeconf, dspcntr;

	u32 mipi = MIPI_PORT_EN | PASS_FROM_SPHY_TO_AFE | SEL_FLOPPED_HSTX;

	if (WARN_ON(pipe < 0))
		return;

	pipeconf = dev_priv->pipeconf[pipe];
	dspcntr = dev_priv->dspcntr[pipe];

	if (pipe) {
		pipeconf_reg = PIPECCONF;
		dspcntr_reg = DSPCCNTR;
	} else {
		if (mdfld_get_panel_type(dev, pipe) == TC35876X)
			mipi &= (~0x03); /* Use all four lanes */
		else
			mipi |= 2;
	}

	/*start up display island if it was shutdown*/
	if (!gma_power_begin(dev, true))
		return;

	if (mdfld_get_panel_type(dev, pipe) == TC35876X) {
		/*
		 * The following logic is required to reset the bridge and
		 * configure. This also starts the DSI clock at 200MHz.
		 */
		tc35876x_set_bridge_reset_state(dev, 0);  /*Pull High Reset */
		tc35876x_toshiba_bridge_panel_on(dev);
		udelay(100);
		/* Now start the DSI clock */
		REG_WRITE(MRST_DPLL_A, 0x00);
		REG_WRITE(MRST_FPA0, 0xC1);
		REG_WRITE(MRST_DPLL_A, 0x00800000);
		udelay(500);
		REG_WRITE(MRST_DPLL_A, 0x80800000);

		if (REG_BIT_WAIT(pipeconf_reg, 1, 29))
			dev_err(&dev->pdev->dev, "%s: DSI PLL lock timeout\n",
				__func__);

		REG_WRITE(MIPI_DPHY_PARAM_REG(pipe), 0x2A0c6008);

		mipi_set_properties(dsi_config, pipe);
		mdfld_mipi_config(dsi_config, pipe);
		mdfld_set_pipe_timing(dsi_config, pipe);

		REG_WRITE(DSPABASE, 0x00);
		REG_WRITE(DSPASIZE,
			((mode->vdisplay - 1) << 16) | (mode->hdisplay - 1));

		REG_WRITE(DSPACNTR, 0x98000000);
		REG_WRITE(DSPASURF, 0x00);

		REG_WRITE(VGACNTRL, 0x80000000);
		REG_WRITE(DEVICE_READY_REG, 0x00000001);

		REG_WRITE(MIPI_PORT_CONTROL(pipe), 0x80810000);
	} else {
		/*set up mipi port FIXME: do at init time */
		REG_WRITE(MIPI_PORT_CONTROL(pipe), mipi);
	}
	REG_READ(MIPI_PORT_CONTROL(pipe));

	if (mdfld_get_panel_type(dev, pipe) == TMD_VID) {
		/* NOP */
	} else if (mdfld_get_panel_type(dev, pipe) == TC35876X) {
		/* set up DSI controller DPI interface */
		mdfld_dsi_dpi_controller_init(dsi_config, pipe);

		/* Configure MIPI Bridge and Panel */
		tc35876x_configure_lvds_bridge(dev);
		dev_priv->dpi_panel_on[pipe] = true;
	} else {
		/*turn on DPI interface*/
		mdfld_dsi_dpi_turn_on(dpi_output, pipe);
	}

	/*set up pipe*/
	REG_WRITE(pipeconf_reg, pipeconf);
	REG_READ(pipeconf_reg);

	/*set up display plane*/
	REG_WRITE(dspcntr_reg, dspcntr);
	REG_READ(dspcntr_reg);

	msleep(20); /* FIXME: this should wait for vblank */

	if (mdfld_get_panel_type(dev, pipe) == TMD_VID) {
		/* NOP */
	} else if (mdfld_get_panel_type(dev, pipe) == TC35876X) {
		mdfld_dsi_dpi_turn_on(dpi_output, pipe);
	} else {
		/* init driver ic */
		mdfld_dsi_tpo_ic_init(dsi_config, pipe);
		/*init backlight*/
		mdfld_dsi_brightness_init(dsi_config, pipe);
	}

	gma_power_end(dev);
}

/*
 * Init DSI DPI encoder.
 * Allocate an mdfld_dsi_encoder and attach it to given @dsi_connector
 * return pointer of newly allocated DPI encoder, NULL on error
 */
struct mdfld_dsi_encoder *mdfld_dsi_dpi_init(struct drm_device *dev,
				struct mdfld_dsi_connector *dsi_connector,
				const struct panel_funcs *p_funcs)
{
	struct mdfld_dsi_dpi_output *dpi_output = NULL;
	struct mdfld_dsi_config *dsi_config;
	struct drm_connector *connector = NULL;
	struct drm_encoder *encoder = NULL;
	int pipe;
	u32 data;
	int ret;

	pipe = dsi_connector->pipe;

	if (mdfld_get_panel_type(dev, pipe) != TC35876X) {
		dsi_config = mdfld_dsi_get_config(dsi_connector);

		/* panel hard-reset */
		if (p_funcs->reset) {
			ret = p_funcs->reset(pipe);
			if (ret) {
				DRM_ERROR("Panel %d hard-reset failed\n", pipe);
				return NULL;
			}
		}

		/* panel drvIC init */
		if (p_funcs->drv_ic_init)
			p_funcs->drv_ic_init(dsi_config, pipe);

		/* panel power mode detect */
		ret = mdfld_dsi_get_power_mode(dsi_config, &data, false);
		if (ret) {
			DRM_ERROR("Panel %d get power mode failed\n", pipe);
			dsi_connector->status = connector_status_disconnected;
		} else {
			DRM_INFO("pipe %d power mode 0x%x\n", pipe, data);
			dsi_connector->status = connector_status_connected;
		}
	}

	dpi_output = kzalloc(sizeof(struct mdfld_dsi_dpi_output), GFP_KERNEL);
	if (!dpi_output) {
		DRM_ERROR("No memory\n");
		return NULL;
	}

	dpi_output->panel_on = 0;
	dpi_output->dev = dev;
	if (mdfld_get_panel_type(dev, pipe) != TC35876X)
		dpi_output->p_funcs = p_funcs;
	dpi_output->first_boot = 1;

	/*get fixed mode*/
	dsi_config = mdfld_dsi_get_config(dsi_connector);

	/*create drm encoder object*/
	connector = &dsi_connector->base.base;
	encoder = &dpi_output->base.base.base;
	drm_encoder_init(dev,
			encoder,
			p_funcs->encoder_funcs,
			DRM_MODE_ENCODER_LVDS, NULL);
	drm_encoder_helper_add(encoder,
				p_funcs->encoder_helper_funcs);

	/*attach to given connector*/
	drm_connector_attach_encoder(connector, encoder);

	/*set possible crtcs and clones*/
	if (dsi_connector->pipe) {
		encoder->possible_crtcs = (1 << 2);
		encoder->possible_clones = (1 << 1);
	} else {
		encoder->possible_crtcs = (1 << 0);
		encoder->possible_clones = (1 << 0);
	}

	dsi_connector->base.encoder = &dpi_output->base.base;

	return &dpi_output->base;
}