linux-2.6/drivers/staging/gma500/mdfld_dsi_dbi.c

/*
 * 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 "mdfld_dsi_dbi.h"
#include "mdfld_dsi_dbi_dpu.h"
#include "mdfld_dsi_pkg_sender.h"

#include "power.h"
#include <linux/pm_runtime.h>

int enable_gfx_rtpm;

extern struct drm_device *gpDrmDevice;
extern int gfxrtdelay;
int enter_dsr;
struct mdfld_dsi_dbi_output *gdbi_output;
extern bool gbgfxsuspended;
extern int enable_gfx_rtpm;
extern int gfxrtdelay;

#define MDFLD_DSR_MAX_IDLE_COUNT	2

/*
 * set refreshing area
 */
int mdfld_dsi_dbi_update_area(struct mdfld_dsi_dbi_output *dbi_output,
				u16 x1, u16 y1, u16 x2, u16 y2)
{
	struct mdfld_dsi_pkg_sender *sender =
		mdfld_dsi_encoder_get_pkg_sender(&dbi_output->base);
	u8 param[4];
	u8 cmd;
	int err;

	if (!sender) {
		WARN_ON(1);
		return -EINVAL;
	}

	/* Set column */
	cmd = DCS_SET_COLUMN_ADDRESS;
	param[0] = x1 >> 8;
	param[1] = x1;
	param[2] = x2 >> 8;
	param[3] = x2;

	err = mdfld_dsi_send_dcs(sender,
				 cmd,
				 param,
				 4,
				 CMD_DATA_SRC_SYSTEM_MEM,
				 MDFLD_DSI_QUEUE_PACKAGE);
	if (err) {
		dev_err(sender->dev->dev, "DCS 0x%x sent failed\n", cmd);
		goto err_out;
	}

	/* Set page */
	cmd = DCS_SET_PAGE_ADDRESS;
	param[0] = y1 >> 8;
	param[1] = y1;
	param[2] = y2 >> 8;
	param[3] = y2;

	err = mdfld_dsi_send_dcs(sender,
				 cmd,
				 param,
				 4,
				 CMD_DATA_SRC_SYSTEM_MEM,
				 MDFLD_DSI_QUEUE_PACKAGE);
	if (err) {
		dev_err(sender->dev->dev, "DCS 0x%x sent failed\n", cmd);
		goto err_out;
	}

	/*update screen*/
	err = mdfld_dsi_send_dcs(sender,
				 write_mem_start,
				 NULL,
				 0,
				 CMD_DATA_SRC_PIPE,
				 MDFLD_DSI_QUEUE_PACKAGE);
	if (err) {
		dev_err(sender->dev->dev, "DCS 0x%x sent failed\n", cmd);
		goto err_out;
	}
	mdfld_dsi_cmds_kick_out(sender);
err_out:
	return err;
}

/*
 * set panel's power state
 */
int mdfld_dsi_dbi_update_power(struct mdfld_dsi_dbi_output *dbi_output,
								int mode)
{
	struct drm_device *dev = dbi_output->dev;
	struct mdfld_dsi_pkg_sender *sender =
		mdfld_dsi_encoder_get_pkg_sender(&dbi_output->base);
	u8 param = 0;
	u32 err = 0;

	if (!sender) {
		WARN_ON(1);
		return -EINVAL;
	}

	if (mode == DRM_MODE_DPMS_ON) {
		/* Exit sleep mode */
		err = mdfld_dsi_send_dcs(sender,
					 DCS_EXIT_SLEEP_MODE,
					 NULL,
					 0,
					 CMD_DATA_SRC_SYSTEM_MEM,
					 MDFLD_DSI_QUEUE_PACKAGE);
		if (err) {
			dev_err(dev->dev, "DCS 0x%x sent failed\n",
						DCS_EXIT_SLEEP_MODE);
			goto power_err;
		}

		/* Set display on */
		err = mdfld_dsi_send_dcs(sender,
					 DCS_SET_DISPLAY_ON,
					 NULL,
					 0,
					 CMD_DATA_SRC_SYSTEM_MEM,
					 MDFLD_DSI_QUEUE_PACKAGE);
		if (err) {
			dev_err(dev->dev, "DCS 0x%x sent failed\n",
							DCS_SET_DISPLAY_ON);
			goto power_err;
		}

		/* set tear effect on */
		err = mdfld_dsi_send_dcs(sender,
					 DCS_SET_TEAR_ON,
					 &param,
					 1,
					 CMD_DATA_SRC_SYSTEM_MEM,
					 MDFLD_DSI_QUEUE_PACKAGE);
		if (err) {
			dev_err(dev->dev, "DCS 0x%x sent failed\n",
							set_tear_on);
			goto power_err;
		}

		/**
		 * FIXME: remove this later
		 */
		err = mdfld_dsi_send_dcs(sender,
					 DCS_WRITE_MEM_START,
					 NULL,
					 0,
					 CMD_DATA_SRC_PIPE,
					 MDFLD_DSI_QUEUE_PACKAGE);
		if (err) {
			dev_err(dev->dev, "DCS 0x%x sent failed\n",
						DCS_WRITE_MEM_START);
			goto power_err;
		}
	} else {
		/* Set tear effect off */
		err = mdfld_dsi_send_dcs(sender,
					 DCS_SET_TEAR_OFF,
					 NULL,
					 0,
					 CMD_DATA_SRC_SYSTEM_MEM,
					 MDFLD_DSI_QUEUE_PACKAGE);
		if (err) {
			dev_err(dev->dev, "DCS 0x%x sent failed\n",
							DCS_SET_TEAR_OFF);
			goto power_err;
		}

		/* Turn display off */
		err = mdfld_dsi_send_dcs(sender,
					 DCS_SET_DISPLAY_OFF,
					 NULL,
					 0,
					 CMD_DATA_SRC_SYSTEM_MEM,
					 MDFLD_DSI_QUEUE_PACKAGE);
		if (err) {
			dev_err(dev->dev, "DCS 0x%x sent failed\n",
						DCS_SET_DISPLAY_OFF);
			goto power_err;
		}

		/* Now enter sleep mode */
		err = mdfld_dsi_send_dcs(sender,
					 DCS_ENTER_SLEEP_MODE,
					 NULL,
					 0,
					 CMD_DATA_SRC_SYSTEM_MEM,
					 MDFLD_DSI_QUEUE_PACKAGE);
		if (err) {
			dev_err(dev->dev, "DCS 0x%x sent failed\n",
							DCS_ENTER_SLEEP_MODE);
			goto power_err;
		}
	}
	mdfld_dsi_cmds_kick_out(sender);
power_err:
	return err;
}

/*
 * send a generic DCS command with a parameter list
 */
int mdfld_dsi_dbi_send_dcs(struct mdfld_dsi_dbi_output *dbi_output,
			u8 dcs,  u8 *param, u32 num, u8 data_src)
{
	struct mdfld_dsi_pkg_sender *sender =
		mdfld_dsi_encoder_get_pkg_sender(&dbi_output->base);
	int ret;

	if (!sender) {
		WARN_ON(1);
		return -EINVAL;
	}

	ret = mdfld_dsi_send_dcs(sender,
				 dcs,
				 param,
				 num,
				 data_src,
				 MDFLD_DSI_SEND_PACKAGE);

	return ret;
}

/*
 * Enter DSR
 */
void mdfld_dsi_dbi_enter_dsr(struct mdfld_dsi_dbi_output *dbi_output, int pipe)
{
	u32 reg_val;
	struct drm_device *dev = dbi_output->dev;
	struct drm_psb_private *dev_priv = dev->dev_private;
	struct drm_crtc *crtc = dbi_output->base.base.crtc;
	struct psb_intel_crtc *psb_crtc = (crtc) ?
					to_psb_intel_crtc(crtc) : NULL;
	u32 dpll_reg = MRST_DPLL_A;
	u32 pipeconf_reg = PIPEACONF;
	u32 dspcntr_reg = DSPACNTR;

	if (!dbi_output)
		return;

	/* FIXME check if can go */
	dev_priv->is_in_idle = true;

	gdbi_output = dbi_output;
	if ((dbi_output->mode_flags & MODE_SETTING_ON_GOING) ||
		(psb_crtc && psb_crtc->mode_flags & MODE_SETTING_ON_GOING))
		return;

	if (pipe == 2) {
		dpll_reg = MRST_DPLL_A;
		pipeconf_reg = PIPECCONF;
		dspcntr_reg = DSPCCNTR;
	}

	if (!gma_power_begin(dev, true)) {
		dev_err(dev->dev, "hw begin failed\n");
		return;
	}
	/* Disable te interrupts */
	mdfld_disable_te(dev, pipe);

	/* Disable plane */
	reg_val = REG_READ(dspcntr_reg);
	if (!(reg_val & DISPLAY_PLANE_ENABLE)) {
		REG_WRITE(dspcntr_reg, reg_val & ~DISPLAY_PLANE_ENABLE);
		REG_READ(dspcntr_reg);
	}

	/* Disable pipe */
	reg_val = REG_READ(pipeconf_reg);
	if (!(reg_val & DISPLAY_PLANE_ENABLE)) {
		reg_val &= ~DISPLAY_PLANE_ENABLE;
		reg_val |= (PIPECONF_PLANE_OFF | PIPECONF_CURSOR_OFF);
		REG_WRITE(pipeconf_reg, reg_val);
		REG_READ(pipeconf_reg);
		mdfldWaitForPipeDisable(dev, pipe);
	}

	/* Disable DPLL */
	reg_val = REG_READ(dpll_reg);
	if (!(reg_val & DPLL_VCO_ENABLE)) {
		reg_val &= ~DPLL_VCO_ENABLE;
		REG_WRITE(dpll_reg, reg_val);
		REG_READ(dpll_reg);
		udelay(500);
	}

	gma_power_end(dev);
	dbi_output->mode_flags |= MODE_SETTING_IN_DSR;
	if (pipe == 2) {
		enter_dsr = 1;
		/* pm_schedule_suspend(&dev->pdev->dev, gfxrtdelay); */
	}
}

static void mdfld_dbi_output_exit_dsr(struct mdfld_dsi_dbi_output *dbi_output,
			int pipe)
{
	struct drm_device *dev = dbi_output->dev;
	struct drm_crtc *crtc = dbi_output->base.base.crtc;
	struct psb_intel_crtc *psb_crtc = (crtc) ?
					to_psb_intel_crtc(crtc) : NULL;
	u32 reg_val;
	u32 dpll_reg = MRST_DPLL_A;
	u32 pipeconf_reg = PIPEACONF;
	u32 dspcntr_reg = DSPACNTR;
	u32 reg_offset = 0;

	/*if mode setting on-going, back off*/
	if ((dbi_output->mode_flags & MODE_SETTING_ON_GOING) ||
		(psb_crtc && psb_crtc->mode_flags & MODE_SETTING_ON_GOING))
		return;

	if (pipe == 2) {
		dpll_reg = MRST_DPLL_A;
		pipeconf_reg = PIPECCONF;
		dspcntr_reg = DSPCCNTR;
		reg_offset = MIPIC_REG_OFFSET;
	}

	if (!gma_power_begin(dev, true)) {
		dev_err(dev->dev, "hw begin failed\n");
		return;
	}

	/* Enable DPLL */
	reg_val = REG_READ(dpll_reg);
	if (!(reg_val & DPLL_VCO_ENABLE)) {
		if (reg_val & MDFLD_PWR_GATE_EN) {
			reg_val &= ~MDFLD_PWR_GATE_EN;
			REG_WRITE(dpll_reg, reg_val);
			REG_READ(dpll_reg);
			udelay(500);
		}

		reg_val |= DPLL_VCO_ENABLE;
		REG_WRITE(dpll_reg, reg_val);
		REG_READ(dpll_reg);
		udelay(500);

		/* Add timeout */
		while (!(REG_READ(pipeconf_reg) & PIPECONF_DSIPLL_LOCK))
			cpu_relax();
	}

	/* Enable pipe */
	reg_val = REG_READ(pipeconf_reg);
	if (!(reg_val & PIPEACONF_ENABLE)) {
		reg_val |= PIPEACONF_ENABLE;
		REG_WRITE(pipeconf_reg, reg_val);
		REG_READ(pipeconf_reg);
		udelay(500);
		mdfldWaitForPipeEnable(dev, pipe);
	}

	/* Enable plane */
	reg_val = REG_READ(dspcntr_reg);
	if (!(reg_val & DISPLAY_PLANE_ENABLE)) {
		reg_val |= DISPLAY_PLANE_ENABLE;
		REG_WRITE(dspcntr_reg, reg_val);
		REG_READ(dspcntr_reg);
		udelay(500);
	}

	/* Enable TE interrupt on this pipe */
	mdfld_enable_te(dev, pipe);
	gma_power_end(dev);

	/*clean IN_DSR flag*/
	dbi_output->mode_flags &= ~MODE_SETTING_IN_DSR;
}

/*
 * Exit from DSR
 */
void mdfld_dsi_dbi_exit_dsr(struct drm_device *dev, u32 update_src)
{
	struct drm_psb_private *dev_priv = dev->dev_private;
	struct mdfld_dbi_dsr_info *dsr_info = dev_priv->dbi_dsr_info;
	struct mdfld_dsi_dbi_output **dbi_output;
	int i;
	int pipe;

	/* FIXME can go ? */
	dev_priv->is_in_idle = false;
	dbi_output = dsr_info->dbi_outputs;

#ifdef CONFIG_PM_RUNTIME
	 if (!enable_gfx_rtpm) {
/*                pm_runtime_allow(&gpDrmDevice->pdev->dev); */
/*		schedule_delayed_work(&rtpm_work, 30 * 1000);*/ /* FIXME: HZ ? */
	}
#endif

	/* For each output, exit dsr */
	for (i = 0; i < dsr_info->dbi_output_num; i++) {
		/* If panel has been turned off, skip */
		if (!dbi_output[i] || !dbi_output[i]->dbi_panel_on)
			continue;
		pipe = dbi_output[i]->channel_num ? 2 : 0;
		enter_dsr = 0;
		mdfld_dbi_output_exit_dsr(dbi_output[i], pipe);
	}
	dev_priv->dsr_fb_update |= update_src;
}

static bool mdfld_dbi_is_in_dsr(struct drm_device *dev)
{
	if (REG_READ(MRST_DPLL_A) & DPLL_VCO_ENABLE)
		return false;
	if ((REG_READ(PIPEACONF) & PIPEACONF_ENABLE) ||
	   (REG_READ(PIPECCONF) & PIPEACONF_ENABLE))
		return false;
	if ((REG_READ(DSPACNTR) & DISPLAY_PLANE_ENABLE) ||
	   (REG_READ(DSPCCNTR) & DISPLAY_PLANE_ENABLE))
		return false;

	return true;
}

/* Periodically update dbi panel */
void mdfld_dbi_update_panel(struct drm_device *dev, int pipe)
{
	struct drm_psb_private *dev_priv = dev->dev_private;
	struct mdfld_dbi_dsr_info *dsr_info = dev_priv->dbi_dsr_info;
	struct mdfld_dsi_dbi_output **dbi_outputs;
	struct mdfld_dsi_dbi_output *dbi_output;
	int i;
	int can_enter_dsr = 0;
	u32 damage_mask;

	dbi_outputs = dsr_info->dbi_outputs;
	dbi_output = pipe ? dbi_outputs[1] : dbi_outputs[0];

	if (!dbi_output)
		return;

	if (pipe == 0)
		damage_mask = dev_priv->dsr_fb_update & MDFLD_DSR_DAMAGE_MASK_0;
	else if (pipe == 2)
		damage_mask = dev_priv->dsr_fb_update & MDFLD_DSR_DAMAGE_MASK_2;
	else
		return;

	/* If FB is damaged and panel is on update on-panel FB */
	if (damage_mask && dbi_output->dbi_panel_on) {
		dbi_output->dsr_fb_update_done = false;

		if (dbi_output->p_funcs->update_fb)
			dbi_output->p_funcs->update_fb(dbi_output, pipe);

		if (dev_priv->dsr_enable && dbi_output->dsr_fb_update_done)
			dev_priv->dsr_fb_update &= ~damage_mask;

		/*clean IN_DSR flag*/
		dbi_output->mode_flags &= ~MODE_SETTING_IN_DSR;

		dbi_output->dsr_idle_count = 0;
	} else {
		dbi_output->dsr_idle_count++;
	}

	switch (dsr_info->dbi_output_num) {
	case 1:
		if (dbi_output->dsr_idle_count > MDFLD_DSR_MAX_IDLE_COUNT)
			can_enter_dsr = 1;
		break;
	case 2:
		if (dbi_outputs[0]->dsr_idle_count > MDFLD_DSR_MAX_IDLE_COUNT
		   && dbi_outputs[1]->dsr_idle_count > MDFLD_DSR_MAX_IDLE_COUNT)
			can_enter_dsr = 1;
		break;
	default:
		DRM_ERROR("Wrong DBI output number\n");
	}

	/* Try to enter DSR */
	if (can_enter_dsr) {
		for (i = 0; i < dsr_info->dbi_output_num; i++) {
			if (!mdfld_dbi_is_in_dsr(dev) && dbi_outputs[i] &&
			   !(dbi_outputs[i]->mode_flags & MODE_SETTING_ON_GOING)) {
				mdfld_dsi_dbi_enter_dsr(dbi_outputs[i],
					dbi_outputs[i]->channel_num ? 2 : 0);
#if 0
				enter_dsr = 1;
				pr_err("%s: enter_dsr = 1\n", __func__);
#endif
			}
		}
	/*schedule rpm suspend after gfxrtdelay*/
#ifdef CONFIG_GFX_RTPM
		if (!dev_priv->rpm_enabled
			|| !enter_dsr
	/*		|| (REG_READ(HDMIB_CONTROL) & HDMIB_PORT_EN) */
			|| pm_schedule_suspend(&dev->pdev->dev, gfxrtdelay))
			dev_warn(dev->dev,
				"Runtime PM schedule suspend failed, rpm %d\n",
					dev_priv->rpm_enabled);
#endif
	}
}

int mdfld_dbi_dsr_init(struct drm_device *dev)
{
	struct drm_psb_private *dev_priv = dev->dev_private;
	struct mdfld_dbi_dsr_info *dsr_info = dev_priv->dbi_dsr_info;

	if (!dsr_info || IS_ERR(dsr_info)) {
		dsr_info = kzalloc(sizeof(struct mdfld_dbi_dsr_info),
								GFP_KERNEL);
		if (!dsr_info) {
			dev_err(dev->dev, "No memory\n");
			return -ENOMEM;
		}
		dev_priv->dbi_dsr_info = dsr_info;
	}
	return 0;
}

void mdfld_dbi_dsr_exit(struct drm_device *dev)
{
	struct drm_psb_private *dev_priv = dev->dev_private;
	struct mdfld_dbi_dsr_info *dsr_info = dev_priv->dbi_dsr_info;

	if (dsr_info) {
		kfree(dsr_info);
		dev_priv->dbi_dsr_info = NULL;
	}
}

void mdfld_dsi_controller_dbi_init(struct mdfld_dsi_config *dsi_config,
								int pipe)
{
	struct drm_device *dev = dsi_config->dev;
	u32 reg_offset = pipe ? MIPIC_REG_OFFSET : 0;
	int lane_count = dsi_config->lane_count;
	u32 val = 0;

	dev_dbg(dev->dev, "Init DBI interface on pipe %d...\n", pipe);

	/* Un-ready device */
	REG_WRITE((MIPIA_DEVICE_READY_REG + reg_offset), 0x00000000);

	/* Init dsi adapter before kicking off */
	REG_WRITE((MIPIA_CONTROL_REG + reg_offset), 0x00000018);

	/* TODO: figure out how to setup these registers */
	REG_WRITE((MIPIA_DPHY_PARAM_REG + reg_offset), 0x150c3408);
	REG_WRITE((MIPIA_CLK_LANE_SWITCH_TIME_CNT_REG + reg_offset),
							0x000a0014);
	REG_WRITE((MIPIA_DBI_BW_CTRL_REG + reg_offset), 0x00000400);
	REG_WRITE((MIPIA_DBI_FIFO_THROTTLE_REG + reg_offset), 0x00000001);
	REG_WRITE((MIPIA_HS_LS_DBI_ENABLE_REG + reg_offset), 0x00000000);

	/* Enable all interrupts */
	REG_WRITE((MIPIA_INTR_EN_REG + reg_offset), 0xffffffff);
	/* Max value: 20 clock cycles of txclkesc */
	REG_WRITE((MIPIA_TURN_AROUND_TIMEOUT_REG + reg_offset), 0x0000001f);
	/* Min 21 txclkesc, max: ffffh */
	REG_WRITE((MIPIA_DEVICE_RESET_TIMER_REG + reg_offset), 0x0000ffff);
	/* Min: 7d0 max: 4e20 */
	REG_WRITE((MIPIA_INIT_COUNT_REG + reg_offset), 0x00000fa0);

	/* Set up func_prg */
	val |= lane_count;
	val |= (dsi_config->channel_num << DSI_DBI_VIRT_CHANNEL_OFFSET);
	val |= DSI_DBI_COLOR_FORMAT_OPTION2;
	REG_WRITE((MIPIA_DSI_FUNC_PRG_REG + reg_offset), val);

	REG_WRITE((MIPIA_HS_TX_TIMEOUT_REG + reg_offset), 0x3fffff);
	REG_WRITE((MIPIA_LP_RX_TIMEOUT_REG + reg_offset), 0xffff);

	/* De-assert dbi_stall when half of DBI FIFO is empty */
	/* REG_WRITE((MIPIA_DBI_FIFO_THROTTLE_REG + reg_offset), 0x00000000); */

	REG_WRITE((MIPIA_HIGH_LOW_SWITCH_COUNT_REG + reg_offset), 0x46);
	REG_WRITE((MIPIA_EOT_DISABLE_REG + reg_offset), 0x00000000);
	REG_WRITE((MIPIA_LP_BYTECLK_REG + reg_offset), 0x00000004);
	REG_WRITE((MIPIA_DEVICE_READY_REG + reg_offset), 0x00000001);
}

#if 0
/*DBI encoder helper funcs*/
static const struct drm_encoder_helper_funcs mdfld_dsi_dbi_helper_funcs = {
	.dpms = mdfld_dsi_dbi_dpms,
	.mode_fixup = mdfld_dsi_dbi_mode_fixup,
	.prepare = mdfld_dsi_dbi_prepare,
	.mode_set = mdfld_dsi_dbi_mode_set,
	.commit = mdfld_dsi_dbi_commit,
};

/*DBI encoder funcs*/
static const struct drm_encoder_funcs mdfld_dsi_dbi_encoder_funcs = {
	.destroy = drm_encoder_cleanup,
};

#endif

/*
 * Init DSI DBI encoder.
 * Allocate an mdfld_dsi_encoder and attach it to given @dsi_connector
 * return pointer of newly allocated DBI encoder, NULL on error
 */
struct mdfld_dsi_encoder *mdfld_dsi_dbi_init(struct drm_device *dev,
				struct mdfld_dsi_connector *dsi_connector,
				struct panel_funcs *p_funcs)
{
	struct drm_psb_private *dev_priv = dev->dev_private;
	struct mdfld_dsi_dbi_output *dbi_output = NULL;
	struct mdfld_dsi_config *dsi_config;
	struct drm_connector *connector = NULL;
	struct drm_encoder *encoder = NULL;
	struct drm_display_mode *fixed_mode = NULL;
	struct psb_gtt *pg = dev_priv ? (&dev_priv->gtt) : NULL;
	struct mdfld_dbi_dpu_info *dpu_info = dev_priv ? (dev_priv->dbi_dpu_info) : NULL;
	struct mdfld_dbi_dsr_info *dsr_info = dev_priv ? (dev_priv->dbi_dsr_info) : NULL;
	u32 data = 0;
	int pipe;
	int ret;

	if (!pg || !dsi_connector || !p_funcs) {
		WARN_ON(1);
		return NULL;
	}

	dsi_config = mdfld_dsi_get_config(dsi_connector);
	pipe = dsi_connector->pipe;

	/*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,
				       MDFLD_DSI_HS_TRANSMISSION);
	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;
	}

	/*TODO: get panel info from DDB*/

	dbi_output = kzalloc(sizeof(struct mdfld_dsi_dbi_output), GFP_KERNEL);
	if (!dbi_output) {
		dev_err(dev->dev, "No memory\n");
		return NULL;
	}

	if (dsi_connector->pipe == 0) {
		dbi_output->channel_num = 0;
		dev_priv->dbi_output = dbi_output;
	} else if (dsi_connector->pipe == 2) {
		dbi_output->channel_num = 1;
		dev_priv->dbi_output2 = dbi_output;
	} else {
		dev_err(dev->dev, "only support 2 DSI outputs\n");
		goto out_err1;
	}

	dbi_output->dev = dev;
	dbi_output->p_funcs = p_funcs;
	fixed_mode = dsi_config->fixed_mode;
	dbi_output->panel_fixed_mode = fixed_mode;

	/* Create drm encoder object */
	connector = &dsi_connector->base.base;
	encoder = &dbi_output->base.base;
	/* Review this if we ever get MIPI-HDMI bridges or similar */
	drm_encoder_init(dev,
			encoder,
			p_funcs->encoder_funcs,
			DRM_MODE_ENCODER_LVDS);
	drm_encoder_helper_add(encoder, p_funcs->encoder_helper_funcs);

	/* Attach to given connector */
	drm_mode_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);
	}

	dev_priv->dsr_fb_update = 0;
	dev_priv->dsr_enable = false;
	dev_priv->exit_idle = mdfld_dsi_dbi_exit_dsr;

	dbi_output->first_boot = true;
	dbi_output->mode_flags = MODE_SETTING_IN_ENCODER;

	/* Add this output to dpu_info if in DPU mode */
	if (dpu_info && dsi_connector->status == connector_status_connected) {
		if (dsi_connector->pipe == 0)
			dpu_info->dbi_outputs[0] = dbi_output;
		else
			dpu_info->dbi_outputs[1] = dbi_output;

		dpu_info->dbi_output_num++;
	} else if (dsi_connector->status == connector_status_connected) {
		/* Add this output to dsr_info if not */
		if (dsi_connector->pipe == 0)
			dsr_info->dbi_outputs[0] = dbi_output;
		else
			dsr_info->dbi_outputs[1] = dbi_output;

		dsr_info->dbi_output_num++;
	}
	return &dbi_output->base;
out_err1:
	kfree(dbi_output);
	return NULL;
}