/*
 * 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/module.h>

#include "mdfld_dsi_output.h"
#include "mdfld_dsi_dpi.h"
#include "mdfld_output.h"
#include "mdfld_dsi_pkg_sender.h"
#include "tc35876x-dsi-lvds.h"
#include <linux/pm_runtime.h>
#include <asm/intel_scu_ipc.h>

/* get the LABC from command line. */
static int LABC_control = 1;

#ifdef MODULE
module_param(LABC_control, int, 0644);
#else

static int __init parse_LABC_control(char *arg)
{
        /* LABC control can be passed in as a cmdline parameter */
        /* to enable this feature add LABC=1 to cmdline */
        /* to disable this feature add LABC=0 to cmdline */
        if (!arg)
                return -EINVAL;

        if (!strcasecmp(arg, "0"))
                LABC_control = 0;
        else if (!strcasecmp(arg, "1"))
                LABC_control = 1;

        return 0;
}
early_param("LABC", parse_LABC_control);
#endif

/**
 * Check and see if the generic control or data buffer is empty and ready.
 */
void mdfld_dsi_gen_fifo_ready(struct drm_device *dev, u32 gen_fifo_stat_reg,
                                                        u32 fifo_stat)
{
        u32 GEN_BF_time_out_count;

        /* Check MIPI Adatper command registers */
        for (GEN_BF_time_out_count = 0;
                        GEN_BF_time_out_count < GEN_FB_TIME_OUT;
                        GEN_BF_time_out_count++) {
                if ((REG_READ(gen_fifo_stat_reg) & fifo_stat) == fifo_stat)
                        break;
                udelay(100);
        }

        if (GEN_BF_time_out_count == GEN_FB_TIME_OUT)
                DRM_ERROR("mdfld_dsi_gen_fifo_ready, Timeout. gen_fifo_stat_reg = 0x%x.\n",
                                        gen_fifo_stat_reg);
}

/**
 * Manage the DSI MIPI keyboard and display brightness.
 * FIXME: this is exported to OSPM code. should work out an specific
 * display interface to OSPM.
 */

void mdfld_dsi_brightness_init(struct mdfld_dsi_config *dsi_config, int pipe)
{
        struct mdfld_dsi_pkg_sender *sender =
                                mdfld_dsi_get_pkg_sender(dsi_config);
        struct drm_device *dev;
        struct drm_psb_private *dev_priv;
        u32 gen_ctrl_val;

        if (!sender) {
                DRM_ERROR("No sender found\n");
                return;
        }

        dev = sender->dev;
        dev_priv = dev->dev_private;

        /* Set default display backlight value to 85% (0xd8)*/
        mdfld_dsi_send_mcs_short(sender, write_display_brightness, 0xd8, 1,
                                true);

        /* Set minimum brightness setting of CABC function to 20% (0x33)*/
        mdfld_dsi_send_mcs_short(sender, write_cabc_min_bright, 0x33, 1, true);

        /* Enable backlight or/and LABC */
        gen_ctrl_val = BRIGHT_CNTL_BLOCK_ON | DISPLAY_DIMMING_ON |
                                                                BACKLIGHT_ON;
        if (LABC_control == 1)
                gen_ctrl_val |= DISPLAY_DIMMING_ON | DISPLAY_BRIGHTNESS_AUTO
                                                                | GAMMA_AUTO;

        if (LABC_control == 1)
                gen_ctrl_val |= AMBIENT_LIGHT_SENSE_ON;

        dev_priv->mipi_ctrl_display = gen_ctrl_val;

        mdfld_dsi_send_mcs_short(sender, write_ctrl_display, (u8)gen_ctrl_val,
                                1, true);

        mdfld_dsi_send_mcs_short(sender, write_ctrl_cabc, UI_IMAGE, 1, true);
}

void mdfld_dsi_brightness_control(struct drm_device *dev, int pipe, int level)
{
        struct mdfld_dsi_pkg_sender *sender;
        struct drm_psb_private *dev_priv;
        struct mdfld_dsi_config *dsi_config;
        u32 gen_ctrl_val = 0;
        int p_type = TMD_VID;

        if (!dev || (pipe != 0 && pipe != 2)) {
                DRM_ERROR("Invalid parameter\n");
                return;
        }

        p_type = mdfld_get_panel_type(dev, 0);

        dev_priv = dev->dev_private;

        if (pipe)
                dsi_config = dev_priv->dsi_configs[1];
        else
                dsi_config = dev_priv->dsi_configs[0];

        sender = mdfld_dsi_get_pkg_sender(dsi_config);

        if (!sender) {
                DRM_ERROR("No sender found\n");
                return;
        }

        gen_ctrl_val = (level * 0xff / MDFLD_DSI_BRIGHTNESS_MAX_LEVEL) & 0xff;

        dev_dbg(sender->dev->dev, "pipe = %d, gen_ctrl_val = %d.\n",
                                                        pipe, gen_ctrl_val);

        if (p_type == TMD_VID) {
                /* Set display backlight value */
                mdfld_dsi_send_mcs_short(sender, tmd_write_display_brightness,
                                        (u8)gen_ctrl_val, 1, true);
        } else {
                /* Set display backlight value */
                mdfld_dsi_send_mcs_short(sender, write_display_brightness,
                                        (u8)gen_ctrl_val, 1, true);

                /* Enable backlight control */
                if (level == 0)
                        gen_ctrl_val = 0;
                else
                        gen_ctrl_val = dev_priv->mipi_ctrl_display;

                mdfld_dsi_send_mcs_short(sender, write_ctrl_display,
                                        (u8)gen_ctrl_val, 1, true);
        }
}

static int mdfld_dsi_get_panel_status(struct mdfld_dsi_config *dsi_config,
                                u8 dcs, u32 *data, bool hs)
{
        struct mdfld_dsi_pkg_sender *sender
                = mdfld_dsi_get_pkg_sender(dsi_config);

        if (!sender || !data) {
                DRM_ERROR("Invalid parameter\n");
                return -EINVAL;
        }

        return mdfld_dsi_read_mcs(sender, dcs, data, 1, hs);
}

int mdfld_dsi_get_power_mode(struct mdfld_dsi_config *dsi_config, u32 *mode,
                        bool hs)
{
        if (!dsi_config || !mode) {
                DRM_ERROR("Invalid parameter\n");
                return -EINVAL;
        }

        return mdfld_dsi_get_panel_status(dsi_config, 0x0a, mode, hs);
}

/*
 * NOTE: this function was used by OSPM.
 * TODO: will be removed later, should work out display interfaces for OSPM
 */
void mdfld_dsi_controller_init(struct mdfld_dsi_config *dsi_config, int pipe)
{
        if (!dsi_config || ((pipe != 0) && (pipe != 2))) {
                DRM_ERROR("Invalid parameters\n");
                return;
        }

        mdfld_dsi_dpi_controller_init(dsi_config, pipe);
}

static void mdfld_dsi_connector_save(struct drm_connector *connector)
{
}

static void mdfld_dsi_connector_restore(struct drm_connector *connector)
{
}

/* FIXME: start using the force parameter */
static enum drm_connector_status
mdfld_dsi_connector_detect(struct drm_connector *connector, bool force)
{
        struct mdfld_dsi_connector *dsi_connector
                = mdfld_dsi_connector(connector);

        dsi_connector->status = connector_status_connected;

        return dsi_connector->status;
}

static int mdfld_dsi_connector_set_property(struct drm_connector *connector,
                                struct drm_property *property,
                                uint64_t value)
{
        struct drm_encoder *encoder = connector->encoder;

        if (!strcmp(property->name, "scaling mode") && encoder) {
                struct gma_crtc *gma_crtc = to_gma_crtc(encoder->crtc);
                bool centerechange;
                uint64_t val;

                if (!gma_crtc)
                        goto set_prop_error;

                switch (value) {
                case DRM_MODE_SCALE_FULLSCREEN:
                        break;
                case DRM_MODE_SCALE_NO_SCALE:
                        break;
                case DRM_MODE_SCALE_ASPECT:
                        break;
                default:
                        goto set_prop_error;
                }

                if (drm_object_property_get_value(&connector->base, property, &val))
                        goto set_prop_error;

                if (val == value)
                        goto set_prop_done;

                if (drm_object_property_set_value(&connector->base,
                                                        property, value))
                        goto set_prop_error;

                centerechange = (val == DRM_MODE_SCALE_NO_SCALE) ||
                        (value == DRM_MODE_SCALE_NO_SCALE);

                if (gma_crtc->saved_mode.hdisplay != 0 &&
                    gma_crtc->saved_mode.vdisplay != 0) {
                        if (centerechange) {
                                if (!drm_crtc_helper_set_mode(encoder->crtc,
                                                &gma_crtc->saved_mode,
                                                encoder->crtc->x,
                                                encoder->crtc->y,
                                                encoder->crtc->primary->fb))
                                        goto set_prop_error;
                        } else {
                                const struct drm_encoder_helper_funcs *funcs =
                                                encoder->helper_private;
                                funcs->mode_set(encoder,
                                        &gma_crtc->saved_mode,
                                        &gma_crtc->saved_adjusted_mode);
                        }
                }
        } else if (!strcmp(property->name, "backlight") && encoder) {
                if (drm_object_property_set_value(&connector->base, property,
                                                                        value))
                        goto set_prop_error;
                else
                        gma_backlight_set(encoder->dev, value);
        }
set_prop_done:
        return 0;
set_prop_error:
        return -1;
}

static void mdfld_dsi_connector_destroy(struct drm_connector *connector)
{
        struct mdfld_dsi_connector *dsi_connector =
                                        mdfld_dsi_connector(connector);
        struct mdfld_dsi_pkg_sender *sender;

        if (!dsi_connector)
                return;
        drm_connector_unregister(connector);
        drm_connector_cleanup(connector);
        sender = dsi_connector->pkg_sender;
        mdfld_dsi_pkg_sender_destroy(sender);
        kfree(dsi_connector);
}

static int mdfld_dsi_connector_get_modes(struct drm_connector *connector)
{
        struct mdfld_dsi_connector *dsi_connector =
                                mdfld_dsi_connector(connector);
        struct mdfld_dsi_config *dsi_config =
                                mdfld_dsi_get_config(dsi_connector);
        struct drm_display_mode *fixed_mode = dsi_config->fixed_mode;
        struct drm_display_mode *dup_mode = NULL;
        struct drm_device *dev = connector->dev;

        if (fixed_mode) {
                dev_dbg(dev->dev, "fixed_mode %dx%d\n",
                                fixed_mode->hdisplay, fixed_mode->vdisplay);
                dup_mode = drm_mode_duplicate(dev, fixed_mode);
                drm_mode_probed_add(connector, dup_mode);
                return 1;
        }
        DRM_ERROR("Didn't get any modes!\n");
        return 0;
}

static enum drm_mode_status mdfld_dsi_connector_mode_valid(struct drm_connector *connector,
                                                struct drm_display_mode *mode)
{
        struct mdfld_dsi_connector *dsi_connector =
                                        mdfld_dsi_connector(connector);
        struct mdfld_dsi_config *dsi_config =
                                        mdfld_dsi_get_config(dsi_connector);
        struct drm_display_mode *fixed_mode = dsi_config->fixed_mode;

        if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
                return MODE_NO_DBLESCAN;

        if (mode->flags & DRM_MODE_FLAG_INTERLACE)
                return MODE_NO_INTERLACE;

        /**
         * FIXME: current DC has no fitting unit, reject any mode setting
         * request
         * Will figure out a way to do up-scaling(pannel fitting) later.
         **/
        if (fixed_mode) {
                if (mode->hdisplay != fixed_mode->hdisplay)
                        return MODE_PANEL;

                if (mode->vdisplay != fixed_mode->vdisplay)
                        return MODE_PANEL;
        }

        return MODE_OK;
}

static struct drm_encoder *mdfld_dsi_connector_best_encoder(
                                struct drm_connector *connector)
{
        struct mdfld_dsi_connector *dsi_connector =
                                mdfld_dsi_connector(connector);
        struct mdfld_dsi_config *dsi_config =
                                mdfld_dsi_get_config(dsi_connector);
        return &dsi_config->encoder->base.base;
}

/*DSI connector funcs*/
static const struct drm_connector_funcs mdfld_dsi_connector_funcs = {
        .dpms = drm_helper_connector_dpms,
        .detect = mdfld_dsi_connector_detect,
        .fill_modes = drm_helper_probe_single_connector_modes,
        .set_property = mdfld_dsi_connector_set_property,
        .destroy = mdfld_dsi_connector_destroy,
};

/*DSI connector helper funcs*/
static const struct drm_connector_helper_funcs
        mdfld_dsi_connector_helper_funcs = {
        .get_modes = mdfld_dsi_connector_get_modes,
        .mode_valid = mdfld_dsi_connector_mode_valid,
        .best_encoder = mdfld_dsi_connector_best_encoder,
};

static int mdfld_dsi_get_default_config(struct drm_device *dev,
                                struct mdfld_dsi_config *config, int pipe)
{
        if (!dev || !config) {
                DRM_ERROR("Invalid parameters");
                return -EINVAL;
        }

        config->bpp = 24;
        if (mdfld_get_panel_type(dev, pipe) == TC35876X)
                config->lane_count = 4;
        else
                config->lane_count = 2;
        config->channel_num = 0;

        if (mdfld_get_panel_type(dev, pipe) == TMD_VID)
                config->video_mode = MDFLD_DSI_VIDEO_NON_BURST_MODE_SYNC_PULSE;
        else if (mdfld_get_panel_type(dev, pipe) == TC35876X)
                config->video_mode =
                                MDFLD_DSI_VIDEO_NON_BURST_MODE_SYNC_EVENTS;
        else
                config->video_mode = MDFLD_DSI_VIDEO_BURST_MODE;

        return 0;
}

int mdfld_dsi_panel_reset(int pipe)
{
        unsigned gpio;
        int ret = 0;

        switch (pipe) {
        case 0:
                gpio = 128;
                break;
        case 2:
                gpio = 34;
                break;
        default:
                DRM_ERROR("Invalid output\n");
                return -EINVAL;
        }

        ret = gpio_request(gpio, "gfx");
        if (ret) {
                DRM_ERROR("gpio_rqueset failed\n");
                return ret;
        }

        ret = gpio_direction_output(gpio, 1);
        if (ret) {
                DRM_ERROR("gpio_direction_output failed\n");
                goto gpio_error;
        }

        gpio_get_value(128);

gpio_error:
        if (gpio_is_valid(gpio))
                gpio_free(gpio);

        return ret;
}

/*
 * MIPI output init
 * @dev drm device
 * @pipe pipe number. 0 or 2
 * @config
 *
 * Do the initialization of a MIPI output, including create DRM mode objects
 * initialization of DSI output on @pipe
 */
void mdfld_dsi_output_init(struct drm_device *dev,
                           int pipe,
                           const struct panel_funcs *p_vid_funcs)
{
        struct mdfld_dsi_config *dsi_config;
        struct mdfld_dsi_connector *dsi_connector;
        struct drm_connector *connector;
        struct mdfld_dsi_encoder *encoder;
        struct drm_psb_private *dev_priv = dev->dev_private;
        struct panel_info dsi_panel_info;
        u32 width_mm, height_mm;

        dev_dbg(dev->dev, "init DSI output on pipe %d\n", pipe);

        if (pipe != 0 && pipe != 2) {
                DRM_ERROR("Invalid parameter\n");
                return;
        }

        /*create a new connetor*/
        dsi_connector = kzalloc(sizeof(struct mdfld_dsi_connector), GFP_KERNEL);
        if (!dsi_connector) {
                DRM_ERROR("No memory");
                return;
        }

        dsi_connector->pipe =  pipe;

        dsi_config = kzalloc(sizeof(struct mdfld_dsi_config),
                        GFP_KERNEL);
        if (!dsi_config) {
                DRM_ERROR("cannot allocate memory for DSI config\n");
                goto dsi_init_err0;
        }
        mdfld_dsi_get_default_config(dev, dsi_config, pipe);

        dsi_connector->private = dsi_config;

        dsi_config->changed = 1;
        dsi_config->dev = dev;

        dsi_config->fixed_mode = p_vid_funcs->get_config_mode(dev);
        if (p_vid_funcs->get_panel_info(dev, pipe, &dsi_panel_info))
                        goto dsi_init_err0;

        width_mm = dsi_panel_info.width_mm;
        height_mm = dsi_panel_info.height_mm;

        dsi_config->mode = dsi_config->fixed_mode;
        dsi_config->connector = dsi_connector;

        if (!dsi_config->fixed_mode) {
                DRM_ERROR("No pannel fixed mode was found\n");
                goto dsi_init_err0;
        }

        if (pipe && dev_priv->dsi_configs[0]) {
                dsi_config->dvr_ic_inited = 0;
                dev_priv->dsi_configs[1] = dsi_config;
        } else if (pipe == 0) {
                dsi_config->dvr_ic_inited = 1;
                dev_priv->dsi_configs[0] = dsi_config;
        } else {
                DRM_ERROR("Trying to init MIPI1 before MIPI0\n");
                goto dsi_init_err0;
        }


        connector = &dsi_connector->base.base;
        dsi_connector->base.save = mdfld_dsi_connector_save;
        dsi_connector->base.restore = mdfld_dsi_connector_restore;

        drm_connector_init(dev, connector, &mdfld_dsi_connector_funcs,
                                                DRM_MODE_CONNECTOR_LVDS);
        drm_connector_helper_add(connector, &mdfld_dsi_connector_helper_funcs);

        connector->display_info.subpixel_order = SubPixelHorizontalRGB;
        connector->display_info.width_mm = width_mm;
        connector->display_info.height_mm = height_mm;
        connector->interlace_allowed = false;
        connector->doublescan_allowed = false;

        /*attach properties*/
        drm_object_attach_property(&connector->base,
                                dev->mode_config.scaling_mode_property,
                                DRM_MODE_SCALE_FULLSCREEN);
        drm_object_attach_property(&connector->base,
                                dev_priv->backlight_property,
                                MDFLD_DSI_BRIGHTNESS_MAX_LEVEL);

        /*init DSI package sender on this output*/
        if (mdfld_dsi_pkg_sender_init(dsi_connector, pipe)) {
                DRM_ERROR("Package Sender initialization failed on pipe %d\n",
                                                                        pipe);
                goto dsi_init_err0;
        }

        encoder = mdfld_dsi_dpi_init(dev, dsi_connector, p_vid_funcs);
        if (!encoder) {
                DRM_ERROR("Create DPI encoder failed\n");
                goto dsi_init_err1;
        }
        encoder->private = dsi_config;
        dsi_config->encoder = encoder;
        encoder->base.type = (pipe == 0) ? INTEL_OUTPUT_MIPI :
                INTEL_OUTPUT_MIPI2;
        drm_connector_register(connector);
        return;

        /*TODO: add code to destroy outputs on error*/
dsi_init_err1:
        /*destroy sender*/
        mdfld_dsi_pkg_sender_destroy(dsi_connector->pkg_sender);

        drm_connector_cleanup(connector);

        kfree(dsi_config->fixed_mode);
        kfree(dsi_config);
dsi_init_err0:
        kfree(dsi_connector);
}