[deliverable/linux.git] / drivers / gpu / drm / i915 / intel_dsi_panel_vbt.c

/*
 * Copyright © 2014 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.
 *
 * Author: Shobhit Kumar <shobhit.kumar@intel.com>
 *
 */

#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_edid.h>
#include <drm/i915_drm.h>
#include <linux/slab.h>
#include <video/mipi_display.h>
#include <asm/intel-mid.h>
#include <video/mipi_display.h>
#include "i915_drv.h"
#include "intel_drv.h"
#include "intel_dsi.h"
#include "intel_dsi_cmd.h"

#define MIPI_TRANSFER_MODE_SHIFT	0
#define MIPI_VIRTUAL_CHANNEL_SHIFT	1
#define MIPI_PORT_SHIFT			3

#define PREPARE_CNT_MAX		0x3F
#define EXIT_ZERO_CNT_MAX	0x3F
#define CLK_ZERO_CNT_MAX	0xFF
#define TRAIL_CNT_MAX		0x1F

#define NS_KHZ_RATIO 1000000

#define GPI0_NC_0_HV_DDI0_HPD           0x4130
#define GPIO_NC_0_HV_DDI0_PAD           0x4138
#define GPIO_NC_1_HV_DDI0_DDC_SDA       0x4120
#define GPIO_NC_1_HV_DDI0_DDC_SDA_PAD   0x4128
#define GPIO_NC_2_HV_DDI0_DDC_SCL       0x4110
#define GPIO_NC_2_HV_DDI0_DDC_SCL_PAD   0x4118
#define GPIO_NC_3_PANEL0_VDDEN          0x4140
#define GPIO_NC_3_PANEL0_VDDEN_PAD      0x4148
#define GPIO_NC_4_PANEL0_BLKEN          0x4150
#define GPIO_NC_4_PANEL0_BLKEN_PAD      0x4158
#define GPIO_NC_5_PANEL0_BLKCTL         0x4160
#define GPIO_NC_5_PANEL0_BLKCTL_PAD     0x4168
#define GPIO_NC_6_PCONF0                0x4180
#define GPIO_NC_6_PAD                   0x4188
#define GPIO_NC_7_PCONF0                0x4190
#define GPIO_NC_7_PAD                   0x4198
#define GPIO_NC_8_PCONF0                0x4170
#define GPIO_NC_8_PAD                   0x4178
#define GPIO_NC_9_PCONF0                0x4100
#define GPIO_NC_9_PAD                   0x4108
#define GPIO_NC_10_PCONF0               0x40E0
#define GPIO_NC_10_PAD                  0x40E8
#define GPIO_NC_11_PCONF0               0x40F0
#define GPIO_NC_11_PAD                  0x40F8

struct gpio_table {
	u16 function_reg;
	u16 pad_reg;
	u8 init;
};

static struct gpio_table gtable[] = {
	{ GPI0_NC_0_HV_DDI0_HPD, GPIO_NC_0_HV_DDI0_PAD, 0 },
	{ GPIO_NC_1_HV_DDI0_DDC_SDA, GPIO_NC_1_HV_DDI0_DDC_SDA_PAD, 0 },
	{ GPIO_NC_2_HV_DDI0_DDC_SCL, GPIO_NC_2_HV_DDI0_DDC_SCL_PAD, 0 },
	{ GPIO_NC_3_PANEL0_VDDEN, GPIO_NC_3_PANEL0_VDDEN_PAD, 0 },
	{ GPIO_NC_4_PANEL0_BLKEN, GPIO_NC_4_PANEL0_BLKEN_PAD, 0 },
	{ GPIO_NC_5_PANEL0_BLKCTL, GPIO_NC_5_PANEL0_BLKCTL_PAD, 0 },
	{ GPIO_NC_6_PCONF0, GPIO_NC_6_PAD, 0 },
	{ GPIO_NC_7_PCONF0, GPIO_NC_7_PAD, 0 },
	{ GPIO_NC_8_PCONF0, GPIO_NC_8_PAD, 0 },
	{ GPIO_NC_9_PCONF0, GPIO_NC_9_PAD, 0 },
	{ GPIO_NC_10_PCONF0, GPIO_NC_10_PAD, 0},
	{ GPIO_NC_11_PCONF0, GPIO_NC_11_PAD, 0}
};

static u8 *mipi_exec_send_packet(struct intel_dsi *intel_dsi, u8 *data)
{
	u8 type, byte, mode, vc, port;
	u16 len;

	byte = *data++;
	mode = (byte >> MIPI_TRANSFER_MODE_SHIFT) & 0x1;
	vc = (byte >> MIPI_VIRTUAL_CHANNEL_SHIFT) & 0x3;
	port = (byte >> MIPI_PORT_SHIFT) & 0x3;

	/* LP or HS mode */
	intel_dsi->hs = mode;

	/* get packet type and increment the pointer */
	type = *data++;

	len = *((u16 *) data);
	data += 2;

	switch (type) {
	case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM:
		dsi_vc_generic_write_0(intel_dsi, vc);
		break;
	case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM:
		dsi_vc_generic_write_1(intel_dsi, vc, *data);
		break;
	case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM:
		dsi_vc_generic_write_2(intel_dsi, vc, *data, *(data + 1));
		break;
	case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM:
	case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM:
	case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM:
		DRM_DEBUG_DRIVER("Generic Read not yet implemented or used\n");
		break;
	case MIPI_DSI_GENERIC_LONG_WRITE:
		dsi_vc_generic_write(intel_dsi, vc, data, len);
		break;
	case MIPI_DSI_DCS_SHORT_WRITE:
		dsi_vc_dcs_write_0(intel_dsi, vc, *data);
		break;
	case MIPI_DSI_DCS_SHORT_WRITE_PARAM:
		dsi_vc_dcs_write_1(intel_dsi, vc, *data, *(data + 1));
		break;
	case MIPI_DSI_DCS_READ:
		DRM_DEBUG_DRIVER("DCS Read not yet implemented or used\n");
		break;
	case MIPI_DSI_DCS_LONG_WRITE:
		dsi_vc_dcs_write(intel_dsi, vc, data, len);
		break;
	}

	data += len;

	return data;
}

static u8 *mipi_exec_delay(struct intel_dsi *intel_dsi, u8 *data)
{
	u32 delay = *((u32 *) data);

	usleep_range(delay, delay + 10);
	data += 4;

	return data;
}

static u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, u8 *data)
{
	u8 gpio, action;
	u16 function, pad;
	u32 val;
	struct drm_device *dev = intel_dsi->base.base.dev;
	struct drm_i915_private *dev_priv = dev->dev_private;

	gpio = *data++;

	/* pull up/down */
	action = *data++;

	function = gtable[gpio].function_reg;
	pad = gtable[gpio].pad_reg;

	mutex_lock(&dev_priv->dpio_lock);
	if (!gtable[gpio].init) {
		/* program the function */
		/* FIXME: remove constant below */
		vlv_gpio_nc_write(dev_priv, function, 0x2000CC00);
		gtable[gpio].init = 1;
	}

	val = 0x4 | action;

	/* pull up/down */
	vlv_gpio_nc_write(dev_priv, pad, val);
	mutex_unlock(&dev_priv->dpio_lock);

	return data;
}

typedef u8 * (*fn_mipi_elem_exec)(struct intel_dsi *intel_dsi, u8 *data);
static const fn_mipi_elem_exec exec_elem[] = {
	NULL, /* reserved */
	mipi_exec_send_packet,
	mipi_exec_delay,
	mipi_exec_gpio,
	NULL, /* status read; later */
};

/*
 * MIPI Sequence from VBT #53 parsing logic
 * We have already separated each seqence during bios parsing
 * Following is generic execution function for any sequence
 */

static const char * const seq_name[] = {
	"UNDEFINED",
	"MIPI_SEQ_ASSERT_RESET",
	"MIPI_SEQ_INIT_OTP",
	"MIPI_SEQ_DISPLAY_ON",
	"MIPI_SEQ_DISPLAY_OFF",
	"MIPI_SEQ_DEASSERT_RESET"
};

static void generic_exec_sequence(struct intel_dsi *intel_dsi, char *sequence)
{
	u8 *data = sequence;
	fn_mipi_elem_exec mipi_elem_exec;
	int index;

	if (!sequence)
		return;

	DRM_DEBUG_DRIVER("Starting MIPI sequence - %s\n", seq_name[*data]);

	/* go to the first element of the sequence */
	data++;

	/* parse each byte till we reach end of sequence byte - 0x00 */
	while (1) {
		index = *data;
		mipi_elem_exec = exec_elem[index];
		if (!mipi_elem_exec) {
			DRM_ERROR("Unsupported MIPI element, skipping sequence execution\n");
			return;
		}

		/* goto element payload */
		data++;

		/* execute the element specific rotines */
		data = mipi_elem_exec(intel_dsi, data);

		/*
		 * After processing the element, data should point to
		 * next element or end of sequence
		 * check if have we reached end of sequence
		 */
		if (*data == 0x00)
			break;
	}
}

static bool generic_init(struct intel_dsi_device *dsi)
{
	struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
	struct drm_device *dev = intel_dsi->base.base.dev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct mipi_config *mipi_config = dev_priv->vbt.dsi.config;
	struct mipi_pps_data *pps = dev_priv->vbt.dsi.pps;
	struct drm_display_mode *mode = dev_priv->vbt.lfp_lvds_vbt_mode;
	u32 bits_per_pixel = 24;
	u32 tlpx_ns, extra_byte_count, bitrate, tlpx_ui;
	u32 ui_num, ui_den;
	u32 prepare_cnt, exit_zero_cnt, clk_zero_cnt, trail_cnt;
	u32 ths_prepare_ns, tclk_trail_ns;
	u32 tclk_prepare_clkzero, ths_prepare_hszero;
	u32 lp_to_hs_switch, hs_to_lp_switch;

	DRM_DEBUG_KMS("\n");

	intel_dsi->eotp_pkt = mipi_config->eot_pkt_disabled ? 0 : 1;
	intel_dsi->clock_stop = mipi_config->enable_clk_stop ? 1 : 0;
	intel_dsi->lane_count = mipi_config->lane_cnt + 1;
	intel_dsi->pixel_format = mipi_config->videomode_color_format << 7;

	if (intel_dsi->pixel_format == VID_MODE_FORMAT_RGB666)
		bits_per_pixel = 18;
	else if (intel_dsi->pixel_format == VID_MODE_FORMAT_RGB565)
		bits_per_pixel = 16;

	bitrate = (mode->clock * bits_per_pixel) / intel_dsi->lane_count;

	intel_dsi->operation_mode = mipi_config->is_cmd_mode;
	intel_dsi->video_mode_format = mipi_config->video_transfer_mode;
	intel_dsi->escape_clk_div = mipi_config->byte_clk_sel;
	intel_dsi->lp_rx_timeout = mipi_config->lp_rx_timeout;
	intel_dsi->turn_arnd_val = mipi_config->turn_around_timeout;
	intel_dsi->rst_timer_val = mipi_config->device_reset_timer;
	intel_dsi->init_count = mipi_config->master_init_timer;
	intel_dsi->bw_timer = mipi_config->dbi_bw_timer;
	intel_dsi->video_frmt_cfg_bits =
		mipi_config->bta_enabled ? DISABLE_VIDEO_BTA : 0;

	switch (intel_dsi->escape_clk_div) {
	case 0:
		tlpx_ns = 50;
		break;
	case 1:
		tlpx_ns = 100;
		break;

	case 2:
		tlpx_ns = 200;
		break;
	default:
		tlpx_ns = 50;
		break;
	}

	switch (intel_dsi->lane_count) {
	case 1:
	case 2:
		extra_byte_count = 2;
		break;
	case 3:
		extra_byte_count = 4;
		break;
	case 4:
	default:
		extra_byte_count = 3;
		break;
	}

	/*
	 * ui(s) = 1/f [f in hz]
	 * ui(ns) = 10^9 / (f*10^6) [f in Mhz] -> 10^3/f(Mhz)
	 */

	/* in Kbps */
	ui_num = NS_KHZ_RATIO;
	ui_den = bitrate;

	tclk_prepare_clkzero = mipi_config->tclk_prepare_clkzero;
	ths_prepare_hszero = mipi_config->ths_prepare_hszero;

	/*
	 * B060
	 * LP byte clock = TLPX/ (8UI)
	 */
	intel_dsi->lp_byte_clk = DIV_ROUND_UP(tlpx_ns * ui_den, 8 * ui_num);

	/* count values in UI = (ns value) * (bitrate / (2 * 10^6))
	 *
	 * Since txddrclkhs_i is 2xUI, all the count values programmed in
	 * DPHY param register are divided by 2
	 *
	 * prepare count
	 */
	ths_prepare_ns = max(mipi_config->ths_prepare,
			     mipi_config->tclk_prepare);
	prepare_cnt = DIV_ROUND_UP(ths_prepare_ns * ui_den, ui_num * 2);

	/* exit zero count */
	exit_zero_cnt = DIV_ROUND_UP(
				(ths_prepare_hszero - ths_prepare_ns) * ui_den,
				ui_num * 2
				);

	/*
	 * Exit zero  is unified val ths_zero and ths_exit
	 * minimum value for ths_exit = 110ns
	 * min (exit_zero_cnt * 2) = 110/UI
	 * exit_zero_cnt = 55/UI
	 */
	 if (exit_zero_cnt < (55 * ui_den / ui_num))
		if ((55 * ui_den) % ui_num)
			exit_zero_cnt += 1;

	/* clk zero count */
	clk_zero_cnt = DIV_ROUND_UP(
			(tclk_prepare_clkzero -	ths_prepare_ns)
			* ui_den, 2 * ui_num);

	/* trail count */
	tclk_trail_ns = max(mipi_config->tclk_trail, mipi_config->ths_trail);
	trail_cnt = DIV_ROUND_UP(tclk_trail_ns * ui_den, 2 * ui_num);

	if (prepare_cnt > PREPARE_CNT_MAX ||
		exit_zero_cnt > EXIT_ZERO_CNT_MAX ||
		clk_zero_cnt > CLK_ZERO_CNT_MAX ||
		trail_cnt > TRAIL_CNT_MAX)
		DRM_DEBUG_DRIVER("Values crossing maximum limits, restricting to max values\n");

	if (prepare_cnt > PREPARE_CNT_MAX)
		prepare_cnt = PREPARE_CNT_MAX;

	if (exit_zero_cnt > EXIT_ZERO_CNT_MAX)
		exit_zero_cnt = EXIT_ZERO_CNT_MAX;

	if (clk_zero_cnt > CLK_ZERO_CNT_MAX)
		clk_zero_cnt = CLK_ZERO_CNT_MAX;

	if (trail_cnt > TRAIL_CNT_MAX)
		trail_cnt = TRAIL_CNT_MAX;

	/* B080 */
	intel_dsi->dphy_reg = exit_zero_cnt << 24 | trail_cnt << 16 |
						clk_zero_cnt << 8 | prepare_cnt;

	/*
	 * LP to HS switch count = 4TLPX + PREP_COUNT * 2 + EXIT_ZERO_COUNT * 2
	 *					+ 10UI + Extra Byte Count
	 *
	 * HS to LP switch count = THS-TRAIL + 2TLPX + Extra Byte Count
	 * Extra Byte Count is calculated according to number of lanes.
	 * High Low Switch Count is the Max of LP to HS and
	 * HS to LP switch count
	 *
	 */
	tlpx_ui = DIV_ROUND_UP(tlpx_ns * ui_den, ui_num);

	/* B044 */
	/* FIXME:
	 * The comment above does not match with the code */
	lp_to_hs_switch = DIV_ROUND_UP(4 * tlpx_ui + prepare_cnt * 2 +
						exit_zero_cnt * 2 + 10, 8);

	hs_to_lp_switch = DIV_ROUND_UP(mipi_config->ths_trail + 2 * tlpx_ui, 8);

	intel_dsi->hs_to_lp_count = max(lp_to_hs_switch, hs_to_lp_switch);
	intel_dsi->hs_to_lp_count += extra_byte_count;

	/* B088 */
	/* LP -> HS for clock lanes
	 * LP clk sync + LP11 + LP01 + tclk_prepare + tclk_zero +
	 *						extra byte count
	 * 2TPLX + 1TLPX + 1 TPLX(in ns) + prepare_cnt * 2 + clk_zero_cnt *
	 *					2(in UI) + extra byte count
	 * In byteclks = (4TLPX + prepare_cnt * 2 + clk_zero_cnt *2 (in UI)) /
	 *					8 + extra byte count
	 */
	intel_dsi->clk_lp_to_hs_count =
		DIV_ROUND_UP(
			4 * tlpx_ui + prepare_cnt * 2 +
			clk_zero_cnt * 2,
			8);

	intel_dsi->clk_lp_to_hs_count += extra_byte_count;

	/* HS->LP for Clock Lanes
	 * Low Power clock synchronisations + 1Tx byteclk + tclk_trail +
	 *						Extra byte count
	 * 2TLPX + 8UI + (trail_count*2)(in UI) + Extra byte count
	 * In byteclks = (2*TLpx(in UI) + trail_count*2 +8)(in UI)/8 +
	 *						Extra byte count
	 */
	intel_dsi->clk_hs_to_lp_count =
		DIV_ROUND_UP(2 * tlpx_ui + trail_cnt * 2 + 8,
			8);
	intel_dsi->clk_hs_to_lp_count += extra_byte_count;

	DRM_DEBUG_KMS("Eot %s\n", intel_dsi->eotp_pkt ? "enabled" : "disabled");
	DRM_DEBUG_KMS("Clockstop %s\n", intel_dsi->clock_stop ?
						"disabled" : "enabled");
	DRM_DEBUG_KMS("Mode %s\n", intel_dsi->operation_mode ? "command" : "video");
	DRM_DEBUG_KMS("Pixel Format %d\n", intel_dsi->pixel_format);
	DRM_DEBUG_KMS("TLPX %d\n", intel_dsi->escape_clk_div);
	DRM_DEBUG_KMS("LP RX Timeout 0x%x\n", intel_dsi->lp_rx_timeout);
	DRM_DEBUG_KMS("Turnaround Timeout 0x%x\n", intel_dsi->turn_arnd_val);
	DRM_DEBUG_KMS("Init Count 0x%x\n", intel_dsi->init_count);
	DRM_DEBUG_KMS("HS to LP Count 0x%x\n", intel_dsi->hs_to_lp_count);
	DRM_DEBUG_KMS("LP Byte Clock %d\n", intel_dsi->lp_byte_clk);
	DRM_DEBUG_KMS("DBI BW Timer 0x%x\n", intel_dsi->bw_timer);
	DRM_DEBUG_KMS("LP to HS Clock Count 0x%x\n", intel_dsi->clk_lp_to_hs_count);
	DRM_DEBUG_KMS("HS to LP Clock Count 0x%x\n", intel_dsi->clk_hs_to_lp_count);
	DRM_DEBUG_KMS("BTA %s\n",
			intel_dsi->video_frmt_cfg_bits & DISABLE_VIDEO_BTA ?
			"disabled" : "enabled");

	/* delays in VBT are in unit of 100us, so need to convert
	 * here in ms
	 * Delay (100us) * 100 /1000 = Delay / 10 (ms) */
	intel_dsi->backlight_off_delay = pps->bl_disable_delay / 10;
	intel_dsi->backlight_on_delay = pps->bl_enable_delay / 10;
	intel_dsi->panel_on_delay = pps->panel_on_delay / 10;
	intel_dsi->panel_off_delay = pps->panel_off_delay / 10;
	intel_dsi->panel_pwr_cycle_delay = pps->panel_power_cycle_delay / 10;

	return true;
}

static int generic_mode_valid(struct intel_dsi_device *dsi,
		   struct drm_display_mode *mode)
{
	return MODE_OK;
}

static bool generic_mode_fixup(struct intel_dsi_device *dsi,
		    const struct drm_display_mode *mode,
		    struct drm_display_mode *adjusted_mode) {
	return true;
}

static void generic_panel_reset(struct intel_dsi_device *dsi)
{
	struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
	struct drm_device *dev = intel_dsi->base.base.dev;
	struct drm_i915_private *dev_priv = dev->dev_private;

	char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_ASSERT_RESET];

	generic_exec_sequence(intel_dsi, sequence);
}

static void generic_disable_panel_power(struct intel_dsi_device *dsi)
{
	struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
	struct drm_device *dev = intel_dsi->base.base.dev;
	struct drm_i915_private *dev_priv = dev->dev_private;

	char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET];

	generic_exec_sequence(intel_dsi, sequence);
}

static void generic_send_otp_cmds(struct intel_dsi_device *dsi)
{
	struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
	struct drm_device *dev = intel_dsi->base.base.dev;
	struct drm_i915_private *dev_priv = dev->dev_private;

	char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP];

	generic_exec_sequence(intel_dsi, sequence);
}

static void generic_enable(struct intel_dsi_device *dsi)
{
	struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
	struct drm_device *dev = intel_dsi->base.base.dev;
	struct drm_i915_private *dev_priv = dev->dev_private;

	char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_DISPLAY_ON];

	generic_exec_sequence(intel_dsi, sequence);
}

static void generic_disable(struct intel_dsi_device *dsi)
{
	struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
	struct drm_device *dev = intel_dsi->base.base.dev;
	struct drm_i915_private *dev_priv = dev->dev_private;

	char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_DISPLAY_OFF];

	generic_exec_sequence(intel_dsi, sequence);
}

static enum drm_connector_status generic_detect(struct intel_dsi_device *dsi)
{
	return connector_status_connected;
}

static bool generic_get_hw_state(struct intel_dsi_device *dev)
{
	return true;
}

static struct drm_display_mode *generic_get_modes(struct intel_dsi_device *dsi)
{
	struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
	struct drm_device *dev = intel_dsi->base.base.dev;
	struct drm_i915_private *dev_priv = dev->dev_private;

	dev_priv->vbt.lfp_lvds_vbt_mode->type |= DRM_MODE_TYPE_PREFERRED;
	return dev_priv->vbt.lfp_lvds_vbt_mode;
}

static void generic_destroy(struct intel_dsi_device *dsi) { }

/* Callbacks. We might not need them all. */
struct intel_dsi_dev_ops vbt_generic_dsi_display_ops = {
	.init = generic_init,
	.mode_valid = generic_mode_valid,
	.mode_fixup = generic_mode_fixup,
	.panel_reset = generic_panel_reset,
	.disable_panel_power = generic_disable_panel_power,
	.send_otp_cmds = generic_send_otp_cmds,
	.enable = generic_enable,
	.disable = generic_disable,
	.detect = generic_detect,
	.get_hw_state = generic_get_hw_state,
	.get_modes = generic_get_modes,
	.destroy = generic_destroy,
};
Commit	Line	Data
2ab8b458 SK	1	/*
	2	* Copyright © 2014 Intel Corporation
	3	*
	4	* Permission is hereby granted, free of charge, to any person obtaining a
	5	* copy of this software and associated documentation files (the "Software"),
	6	* to deal in the Software without restriction, including without limitation
	7	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	8	* and/or sell copies of the Software, and to permit persons to whom the
	9	* Software is furnished to do so, subject to the following conditions:
	10	*
	11	* The above copyright notice and this permission notice (including the next
	12	* paragraph) shall be included in all copies or substantial portions of the
	13	* Software.
	14	*
	15	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	16	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	17	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	18	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	19	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	20	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
	21	* DEALINGS IN THE SOFTWARE.
	22	*
	23	* Author: Shobhit Kumar <shobhit.kumar@intel.com>
	24	*
	25	*/
	26
	27	#include <drm/drmP.h>
	28	#include <drm/drm_crtc.h>
	29	#include <drm/drm_edid.h>
	30	#include <drm/i915_drm.h>
	31	#include <linux/slab.h>
	32	#include <video/mipi_display.h>
	33	#include <asm/intel-mid.h>
	34	#include <video/mipi_display.h>
	35	#include "i915_drv.h"
	36	#include "intel_drv.h"
	37	#include "intel_dsi.h"
	38	#include "intel_dsi_cmd.h"
	39
	40	#define MIPI_TRANSFER_MODE_SHIFT 0
	41	#define MIPI_VIRTUAL_CHANNEL_SHIFT 1
	42	#define MIPI_PORT_SHIFT 3
	43
	44	#define PREPARE_CNT_MAX 0x3F
	45	#define EXIT_ZERO_CNT_MAX 0x3F
	46	#define CLK_ZERO_CNT_MAX 0xFF
	47	#define TRAIL_CNT_MAX 0x1F
	48
	49	#define NS_KHZ_RATIO 1000000
	50
	51	#define GPI0_NC_0_HV_DDI0_HPD 0x4130
	52	#define GPIO_NC_0_HV_DDI0_PAD 0x4138
	53	#define GPIO_NC_1_HV_DDI0_DDC_SDA 0x4120
	54	#define GPIO_NC_1_HV_DDI0_DDC_SDA_PAD 0x4128
	55	#define GPIO_NC_2_HV_DDI0_DDC_SCL 0x4110
	56	#define GPIO_NC_2_HV_DDI0_DDC_SCL_PAD 0x4118
	57	#define GPIO_NC_3_PANEL0_VDDEN 0x4140
	58	#define GPIO_NC_3_PANEL0_VDDEN_PAD 0x4148
	59	#define GPIO_NC_4_PANEL0_BLKEN 0x4150
	60	#define GPIO_NC_4_PANEL0_BLKEN_PAD 0x4158
	61	#define GPIO_NC_5_PANEL0_BLKCTL 0x4160
	62	#define GPIO_NC_5_PANEL0_BLKCTL_PAD 0x4168
	63	#define GPIO_NC_6_PCONF0 0x4180
	64	#define GPIO_NC_6_PAD 0x4188
65	#define GPIO_NC_7_PCONF0 0x4190
66	#define GPIO_NC_7_PAD 0x4198
67	#define GPIO_NC_8_PCONF0 0x4170
68	#define GPIO_NC_8_PAD 0x4178
69	#define GPIO_NC_9_PCONF0 0x4100
70	#define GPIO_NC_9_PAD 0x4108
71	#define GPIO_NC_10_PCONF0 0x40E0
72	#define GPIO_NC_10_PAD 0x40E8
73	#define GPIO_NC_11_PCONF0 0x40F0
74	#define GPIO_NC_11_PAD 0x40F8
75
76	struct gpio_table {
77	u16 function_reg;
78	u16 pad_reg;
79	u8 init;
80	};
81
82	static struct gpio_table gtable[] = {
83	{ GPI0_NC_0_HV_DDI0_HPD, GPIO_NC_0_HV_DDI0_PAD, 0 },
84	{ GPIO_NC_1_HV_DDI0_DDC_SDA, GPIO_NC_1_HV_DDI0_DDC_SDA_PAD, 0 },
85	{ GPIO_NC_2_HV_DDI0_DDC_SCL, GPIO_NC_2_HV_DDI0_DDC_SCL_PAD, 0 },
86	{ GPIO_NC_3_PANEL0_VDDEN, GPIO_NC_3_PANEL0_VDDEN_PAD, 0 },
87	{ GPIO_NC_4_PANEL0_BLKEN, GPIO_NC_4_PANEL0_BLKEN_PAD, 0 },
88	{ GPIO_NC_5_PANEL0_BLKCTL, GPIO_NC_5_PANEL0_BLKCTL_PAD, 0 },
89	{ GPIO_NC_6_PCONF0, GPIO_NC_6_PAD, 0 },
90	{ GPIO_NC_7_PCONF0, GPIO_NC_7_PAD, 0 },
91	{ GPIO_NC_8_PCONF0, GPIO_NC_8_PAD, 0 },
92	{ GPIO_NC_9_PCONF0, GPIO_NC_9_PAD, 0 },
93	{ GPIO_NC_10_PCONF0, GPIO_NC_10_PAD, 0},
94	{ GPIO_NC_11_PCONF0, GPIO_NC_11_PAD, 0}
95	};
96
97	static u8 mipi_exec_send_packet(struct intel_dsi intel_dsi, u8 *data)
98	{
99	u8 type, byte, mode, vc, port;
100	u16 len;
101
102	byte = *data++;
103	mode = (byte >> MIPI_TRANSFER_MODE_SHIFT) & 0x1;
104	vc = (byte >> MIPI_VIRTUAL_CHANNEL_SHIFT) & 0x3;
105	port = (byte >> MIPI_PORT_SHIFT) & 0x3;
106
107	/* LP or HS mode */
108	intel_dsi->hs = mode;
109
110	/* get packet type and increment the pointer */
111	type = *data++;
112
113	len = ((u16 ) data);
114	data += 2;
115
116	switch (type) {
117	case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM:
118	dsi_vc_generic_write_0(intel_dsi, vc);
119	break;
120	case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM:
121	dsi_vc_generic_write_1(intel_dsi, vc, *data);
122	break;
123	case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM:
124	dsi_vc_generic_write_2(intel_dsi, vc, data, (data + 1));
125	break;
126	case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM:
127	case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM:
128	case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM:
129	DRM_DEBUG_DRIVER("Generic Read not yet implemented or used\n");
130	break;
131	case MIPI_DSI_GENERIC_LONG_WRITE:
132	dsi_vc_generic_write(intel_dsi, vc, data, len);
133	break;
134	case MIPI_DSI_DCS_SHORT_WRITE:
135	dsi_vc_dcs_write_0(intel_dsi, vc, *data);
136	break;
137	case MIPI_DSI_DCS_SHORT_WRITE_PARAM:
138	dsi_vc_dcs_write_1(intel_dsi, vc, data, (data + 1));
139	break;
140	case MIPI_DSI_DCS_READ:
141	DRM_DEBUG_DRIVER("DCS Read not yet implemented or used\n");
142	break;
143	case MIPI_DSI_DCS_LONG_WRITE:
144	dsi_vc_dcs_write(intel_dsi, vc, data, len);
145	break;
b5fbcd98	146	}
2ab8b458 SK	147
	148	data += len;
	149
	150	return data;
	151	}
	152
	153	static u8 mipi_exec_delay(struct intel_dsi intel_dsi, u8 *data)
	154	{
	155	u32 delay = ((u32 ) data);
	156
	157	usleep_range(delay, delay + 10);
	158	data += 4;
	159
	160	return data;
	161	}
	162
	163	static u8 mipi_exec_gpio(struct intel_dsi intel_dsi, u8 *data)
	164	{
	165	u8 gpio, action;
	166	u16 function, pad;
	167	u32 val;
	168	struct drm_device *dev = intel_dsi->base.base.dev;
	169	struct drm_i915_private *dev_priv = dev->dev_private;
	170
	171	gpio = *data++;
	172
	173	/* pull up/down */
	174	action = *data++;
	175
	176	function = gtable[gpio].function_reg;
	177	pad = gtable[gpio].pad_reg;
	178
	179	mutex_lock(&dev_priv->dpio_lock);
	180	if (!gtable[gpio].init) {
	181	/* program the function */
	182	/* FIXME: remove constant below */
	183	vlv_gpio_nc_write(dev_priv, function, 0x2000CC00);
	184	gtable[gpio].init = 1;
	185	}
	186
	187	val = 0x4 \| action;
	188
	189	/* pull up/down */
	190	vlv_gpio_nc_write(dev_priv, pad, val);
	191	mutex_unlock(&dev_priv->dpio_lock);
	192
	193	return data;
	194	}
	195
	196	typedef u8 * (fn_mipi_elem_exec)(struct intel_dsi intel_dsi, u8 *data);
	197	static const fn_mipi_elem_exec exec_elem[] = {
	198	NULL, /* reserved */
	199	mipi_exec_send_packet,
	200	mipi_exec_delay,
	201	mipi_exec_gpio,
	202	NULL, /* status read; later */
	203	};
	204
	205	/*
	206	* MIPI Sequence from VBT #53 parsing logic
	207	* We have already separated each seqence during bios parsing
	208	* Following is generic execution function for any sequence
	209	*/
	210
211	static const char * const seq_name[] = {
212	"UNDEFINED",
213	"MIPI_SEQ_ASSERT_RESET",
214	"MIPI_SEQ_INIT_OTP",
215	"MIPI_SEQ_DISPLAY_ON",
216	"MIPI_SEQ_DISPLAY_OFF",
217	"MIPI_SEQ_DEASSERT_RESET"
218	};
219
220	static void generic_exec_sequence(struct intel_dsi intel_dsi, char sequence)
221	{
222	u8 *data = sequence;
223	fn_mipi_elem_exec mipi_elem_exec;
224	int index;
225
226	if (!sequence)
227	return;
228
229	DRM_DEBUG_DRIVER("Starting MIPI sequence - %s\n", seq_name[*data]);
230
231	/* go to the first element of the sequence */
232	data++;
233
234	/* parse each byte till we reach end of sequence byte - 0x00 */
235	while (1) {
236	index = *data;
237	mipi_elem_exec = exec_elem[index];
238	if (!mipi_elem_exec) {
239	DRM_ERROR("Unsupported MIPI element, skipping sequence execution\n");
240	return;
241	}
242
243	/* goto element payload */
244	data++;
245
246	/* execute the element specific rotines */
247	data = mipi_elem_exec(intel_dsi, data);
248
249	/*
250	* After processing the element, data should point to
251	* next element or end of sequence
252	* check if have we reached end of sequence
253	*/
254	if (*data == 0x00)
255	break;
256	}
257	}
258
259	static bool generic_init(struct intel_dsi_device *dsi)
260	{
261	struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
262	struct drm_device *dev = intel_dsi->base.base.dev;
263	struct drm_i915_private *dev_priv = dev->dev_private;
264	struct mipi_config *mipi_config = dev_priv->vbt.dsi.config;
265	struct mipi_pps_data *pps = dev_priv->vbt.dsi.pps;
266	struct drm_display_mode *mode = dev_priv->vbt.lfp_lvds_vbt_mode;
267	u32 bits_per_pixel = 24;
268	u32 tlpx_ns, extra_byte_count, bitrate, tlpx_ui;
269	u32 ui_num, ui_den;
270	u32 prepare_cnt, exit_zero_cnt, clk_zero_cnt, trail_cnt;
271	u32 ths_prepare_ns, tclk_trail_ns;
272	u32 tclk_prepare_clkzero, ths_prepare_hszero;
273	u32 lp_to_hs_switch, hs_to_lp_switch;
274
275	DRM_DEBUG_KMS("\n");
276
277	intel_dsi->eotp_pkt = mipi_config->eot_pkt_disabled ? 0 : 1;
278	intel_dsi->clock_stop = mipi_config->enable_clk_stop ? 1 : 0;
279	intel_dsi->lane_count = mipi_config->lane_cnt + 1;
280	intel_dsi->pixel_format = mipi_config->videomode_color_format << 7;
281
282	if (intel_dsi->pixel_format == VID_MODE_FORMAT_RGB666)
283	bits_per_pixel = 18;
284	else if (intel_dsi->pixel_format == VID_MODE_FORMAT_RGB565)
285	bits_per_pixel = 16;
286
287	bitrate = (mode->clock * bits_per_pixel) / intel_dsi->lane_count;
288
289	intel_dsi->operation_mode = mipi_config->is_cmd_mode;
290	intel_dsi->video_mode_format = mipi_config->video_transfer_mode;
291	intel_dsi->escape_clk_div = mipi_config->byte_clk_sel;
292	intel_dsi->lp_rx_timeout = mipi_config->lp_rx_timeout;
293	intel_dsi->turn_arnd_val = mipi_config->turn_around_timeout;
294	intel_dsi->rst_timer_val = mipi_config->device_reset_timer;
295	intel_dsi->init_count = mipi_config->master_init_timer;
296	intel_dsi->bw_timer = mipi_config->dbi_bw_timer;
b5fbcd98 SK	297	intel_dsi->video_frmt_cfg_bits =
b5fbcd98 SK	298	mipi_config->bta_enabled ? DISABLE_VIDEO_BTA : 0;
2ab8b458 SK	299
	300	switch (intel_dsi->escape_clk_div) {
	301	case 0:
	302	tlpx_ns = 50;
	303	break;
	304	case 1:
	305	tlpx_ns = 100;
	306	break;
	307
	308	case 2:
	309	tlpx_ns = 200;
	310	break;
	311	default:
	312	tlpx_ns = 50;
	313	break;
	314	}
	315
	316	switch (intel_dsi->lane_count) {
	317	case 1:
	318	case 2:
	319	extra_byte_count = 2;
	320	break;
	321	case 3:
	322	extra_byte_count = 4;
	323	break;
	324	case 4:
	325	default:
	326	extra_byte_count = 3;
	327	break;
	328	}
	329
	330	/*
	331	* ui(s) = 1/f [f in hz]
	332	* ui(ns) = 10^9 / (f*10^6) [f in Mhz] -> 10^3/f(Mhz)
	333	*/
	334
	335	/* in Kbps */
	336	ui_num = NS_KHZ_RATIO;
	337	ui_den = bitrate;
	338
	339	tclk_prepare_clkzero = mipi_config->tclk_prepare_clkzero;
	340	ths_prepare_hszero = mipi_config->ths_prepare_hszero;
	341
	342	/*
	343	* B060
	344	* LP byte clock = TLPX/ (8UI)
	345	*/
	346	intel_dsi->lp_byte_clk = DIV_ROUND_UP(tlpx_ns * ui_den, 8 * ui_num);
	347
	348	/* count values in UI = (ns value) * (bitrate / (2 * 10^6))
	349	*
	350	* Since txddrclkhs_i is 2xUI, all the count values programmed in
	351	* DPHY param register are divided by 2
	352	*
	353	* prepare count
	354	*/
b5fbcd98 SK	355	ths_prepare_ns = max(mipi_config->ths_prepare,
b5fbcd98 SK	356	mipi_config->tclk_prepare);
2ab8b458 SK	357	prepare_cnt = DIV_ROUND_UP(ths_prepare_ns * ui_den, ui_num * 2);
	358
	359	/* exit zero count */
	360	exit_zero_cnt = DIV_ROUND_UP(
	361	(ths_prepare_hszero - ths_prepare_ns) * ui_den,
	362	ui_num * 2
	363	);
	364
	365	/*
	366	* Exit zero is unified val ths_zero and ths_exit
	367	* minimum value for ths_exit = 110ns
	368	* min (exit_zero_cnt * 2) = 110/UI
	369	* exit_zero_cnt = 55/UI
	370	*/
	371	if (exit_zero_cnt < (55 * ui_den / ui_num))
	372	if ((55 * ui_den) % ui_num)
	373	exit_zero_cnt += 1;
	374
	375	/* clk zero count */
	376	clk_zero_cnt = DIV_ROUND_UP(
	377	(tclk_prepare_clkzero - ths_prepare_ns)
	378	* ui_den, 2 * ui_num);
	379
	380	/* trail count */
	381	tclk_trail_ns = max(mipi_config->tclk_trail, mipi_config->ths_trail);
	382	trail_cnt = DIV_ROUND_UP(tclk_trail_ns * ui_den, 2 * ui_num);
	383
	384	if (prepare_cnt > PREPARE_CNT_MAX \|\|
	385	exit_zero_cnt > EXIT_ZERO_CNT_MAX \|\|
	386	clk_zero_cnt > CLK_ZERO_CNT_MAX \|\|
	387	trail_cnt > TRAIL_CNT_MAX)
	388	DRM_DEBUG_DRIVER("Values crossing maximum limits, restricting to max values\n");
	389
	390	if (prepare_cnt > PREPARE_CNT_MAX)
	391	prepare_cnt = PREPARE_CNT_MAX;
	392
	393	if (exit_zero_cnt > EXIT_ZERO_CNT_MAX)
	394	exit_zero_cnt = EXIT_ZERO_CNT_MAX;
	395
	396	if (clk_zero_cnt > CLK_ZERO_CNT_MAX)
	397	clk_zero_cnt = CLK_ZERO_CNT_MAX;
	398
	399	if (trail_cnt > TRAIL_CNT_MAX)
	400	trail_cnt = TRAIL_CNT_MAX;
	401
	402	/* B080 */
	403	intel_dsi->dphy_reg = exit_zero_cnt << 24 \| trail_cnt << 16 \|
	404	clk_zero_cnt << 8 \| prepare_cnt;
	405
	406	/*
	407	* LP to HS switch count = 4TLPX + PREP_COUNT * 2 + EXIT_ZERO_COUNT * 2
	408	* + 10UI + Extra Byte Count
	409	*
	410	* HS to LP switch count = THS-TRAIL + 2TLPX + Extra Byte Count
	411	* Extra Byte Count is calculated according to number of lanes.
	412	* High Low Switch Count is the Max of LP to HS and
	413	* HS to LP switch count
	414	*
	415	*/
	416	tlpx_ui = DIV_ROUND_UP(tlpx_ns * ui_den, ui_num);
	417
	418	/* B044 */
	419	/* FIXME:
	420	* The comment above does not match with the code */
421	lp_to_hs_switch = DIV_ROUND_UP(4 * tlpx_ui + prepare_cnt * 2 +
422	exit_zero_cnt * 2 + 10, 8);
423
424	hs_to_lp_switch = DIV_ROUND_UP(mipi_config->ths_trail + 2 * tlpx_ui, 8);
425
426	intel_dsi->hs_to_lp_count = max(lp_to_hs_switch, hs_to_lp_switch);
427	intel_dsi->hs_to_lp_count += extra_byte_count;
428
429	/* B088 */
430	/* LP -> HS for clock lanes
431	* LP clk sync + LP11 + LP01 + tclk_prepare + tclk_zero +
432	* extra byte count
433	* 2TPLX + 1TLPX + 1 TPLX(in ns) + prepare_cnt * 2 + clk_zero_cnt *
434	* 2(in UI) + extra byte count
435	* In byteclks = (4TLPX + prepare_cnt * 2 + clk_zero_cnt *2 (in UI)) /
436	* 8 + extra byte count
437	*/
438	intel_dsi->clk_lp_to_hs_count =
439	DIV_ROUND_UP(
440	4 * tlpx_ui + prepare_cnt * 2 +
441	clk_zero_cnt * 2,
442	8);
443
444	intel_dsi->clk_lp_to_hs_count += extra_byte_count;
445
446	/* HS->LP for Clock Lanes
447	* Low Power clock synchronisations + 1Tx byteclk + tclk_trail +
448	* Extra byte count
449	* 2TLPX + 8UI + (trail_count*2)(in UI) + Extra byte count
450	* In byteclks = (2TLpx(in UI) + trail_count2 +8)(in UI)/8 +
451	* Extra byte count
452	*/
453	intel_dsi->clk_hs_to_lp_count =
454	DIV_ROUND_UP(2 * tlpx_ui + trail_cnt * 2 + 8,
455	8);
456	intel_dsi->clk_hs_to_lp_count += extra_byte_count;
457
458	DRM_DEBUG_KMS("Eot %s\n", intel_dsi->eotp_pkt ? "enabled" : "disabled");
459	DRM_DEBUG_KMS("Clockstop %s\n", intel_dsi->clock_stop ?
460	"disabled" : "enabled");
461	DRM_DEBUG_KMS("Mode %s\n", intel_dsi->operation_mode ? "command" : "video");
462	DRM_DEBUG_KMS("Pixel Format %d\n", intel_dsi->pixel_format);
463	DRM_DEBUG_KMS("TLPX %d\n", intel_dsi->escape_clk_div);
464	DRM_DEBUG_KMS("LP RX Timeout 0x%x\n", intel_dsi->lp_rx_timeout);
465	DRM_DEBUG_KMS("Turnaround Timeout 0x%x\n", intel_dsi->turn_arnd_val);
466	DRM_DEBUG_KMS("Init Count 0x%x\n", intel_dsi->init_count);
467	DRM_DEBUG_KMS("HS to LP Count 0x%x\n", intel_dsi->hs_to_lp_count);
468	DRM_DEBUG_KMS("LP Byte Clock %d\n", intel_dsi->lp_byte_clk);
469	DRM_DEBUG_KMS("DBI BW Timer 0x%x\n", intel_dsi->bw_timer);
470	DRM_DEBUG_KMS("LP to HS Clock Count 0x%x\n", intel_dsi->clk_lp_to_hs_count);
471	DRM_DEBUG_KMS("HS to LP Clock Count 0x%x\n", intel_dsi->clk_hs_to_lp_count);
472	DRM_DEBUG_KMS("BTA %s\n",
473	intel_dsi->video_frmt_cfg_bits & DISABLE_VIDEO_BTA ?
474	"disabled" : "enabled");
475
476	/* delays in VBT are in unit of 100us, so need to convert
477	* here in ms
478	* Delay (100us) * 100 /1000 = Delay / 10 (ms) */
479	intel_dsi->backlight_off_delay = pps->bl_disable_delay / 10;
480	intel_dsi->backlight_on_delay = pps->bl_enable_delay / 10;
481	intel_dsi->panel_on_delay = pps->panel_on_delay / 10;
482	intel_dsi->panel_off_delay = pps->panel_off_delay / 10;
483	intel_dsi->panel_pwr_cycle_delay = pps->panel_power_cycle_delay / 10;
484
485	return true;
486	}
487
488	static int generic_mode_valid(struct intel_dsi_device *dsi,
489	struct drm_display_mode *mode)
490	{
491	return MODE_OK;
492	}
493
494	static bool generic_mode_fixup(struct intel_dsi_device *dsi,
495	const struct drm_display_mode *mode,
496	struct drm_display_mode *adjusted_mode) {
497	return true;
498	}
499
500	static void generic_panel_reset(struct intel_dsi_device *dsi)
501	{
502	struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
503	struct drm_device *dev = intel_dsi->base.base.dev;
504	struct drm_i915_private *dev_priv = dev->dev_private;
505
506	char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_ASSERT_RESET];
507
508	generic_exec_sequence(intel_dsi, sequence);
509	}
510
511	static void generic_disable_panel_power(struct intel_dsi_device *dsi)
512	{
513	struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
514	struct drm_device *dev = intel_dsi->base.base.dev;
515	struct drm_i915_private *dev_priv = dev->dev_private;
516
517	char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET];
518
519	generic_exec_sequence(intel_dsi, sequence);
520	}
521
522	static void generic_send_otp_cmds(struct intel_dsi_device *dsi)
523	{
524	struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
525	struct drm_device *dev = intel_dsi->base.base.dev;
526	struct drm_i915_private *dev_priv = dev->dev_private;
527
528	char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP];
529
530	generic_exec_sequence(intel_dsi, sequence);
531	}
532
533	static void generic_enable(struct intel_dsi_device *dsi)
534	{
535	struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
536	struct drm_device *dev = intel_dsi->base.base.dev;
537	struct drm_i915_private *dev_priv = dev->dev_private;
538
539	char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_DISPLAY_ON];
540
541	generic_exec_sequence(intel_dsi, sequence);
542	}
543
544	static void generic_disable(struct intel_dsi_device *dsi)
545	{
546	struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
547	struct drm_device *dev = intel_dsi->base.base.dev;
548	struct drm_i915_private *dev_priv = dev->dev_private;
549
550	char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_DISPLAY_OFF];
551
552	generic_exec_sequence(intel_dsi, sequence);
553	}
554
555	static enum drm_connector_status generic_detect(struct intel_dsi_device *dsi)
556	{
557	return connector_status_connected;
558	}
559
560	static bool generic_get_hw_state(struct intel_dsi_device *dev)
561	{
562	return true;
563	}
564
565	static struct drm_display_mode generic_get_modes(struct intel_dsi_device dsi)
566	{
567	struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
568	struct drm_device *dev = intel_dsi->base.base.dev;
569	struct drm_i915_private *dev_priv = dev->dev_private;
570
571	dev_priv->vbt.lfp_lvds_vbt_mode->type \|= DRM_MODE_TYPE_PREFERRED;
572	return dev_priv->vbt.lfp_lvds_vbt_mode;
573	}
574
575	static void generic_destroy(struct intel_dsi_device *dsi) { }
576
577	/* Callbacks. We might not need them all. */
578	struct intel_dsi_dev_ops vbt_generic_dsi_display_ops = {
579	.init = generic_init,
580	.mode_valid = generic_mode_valid,
581	.mode_fixup = generic_mode_fixup,
582	.panel_reset = generic_panel_reset,
583	.disable_panel_power = generic_disable_panel_power,
584	.send_otp_cmds = generic_send_otp_cmds,
585	.enable = generic_enable,
586	.disable = generic_disable,
587	.detect = generic_detect,
588	.get_hw_state = generic_get_hw_state,
589	.get_modes = generic_get_modes,
590	.destroy = generic_destroy,
591	};