// SPDX-License-Identifier: GPL-2.0

#include <linux/array_size.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/property.h>
#include <linux/regulator/consumer.h>

#include <video/mipi_display.h>

#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>

#define R69328_MACP             0xb0 /* Manufacturer Access CMD Protect */
#define   R69328_MACP_ON        0x03
#define   R69328_MACP_OFF       0x04

#define R69328_GAMMA_SET_A      0xc8 /* Gamma Setting A */
#define R69328_GAMMA_SET_B      0xc9 /* Gamma Setting B */
#define R69328_GAMMA_SET_C      0xca /* Gamma Setting C */

#define R69328_POWER_SET        0xd1

struct renesas_r69328 {
        struct drm_panel panel;
        struct mipi_dsi_device *dsi;

        struct regulator *vdd_supply;
        struct regulator *vddio_supply;
        struct gpio_desc *reset_gpio;

        bool prepared;
};

static inline struct renesas_r69328 *to_renesas_r69328(struct drm_panel *panel)
{
        return container_of(panel, struct renesas_r69328, panel);
}

static void renesas_r69328_reset(struct renesas_r69328 *priv)
{
        gpiod_set_value_cansleep(priv->reset_gpio, 1);
        usleep_range(10000, 11000);
        gpiod_set_value_cansleep(priv->reset_gpio, 0);
        usleep_range(2000, 3000);
}

static int renesas_r69328_prepare(struct drm_panel *panel)
{
        struct renesas_r69328 *priv = to_renesas_r69328(panel);
        struct device *dev = &priv->dsi->dev;
        int ret;

        if (priv->prepared)
                return 0;

        ret = regulator_enable(priv->vdd_supply);
        if (ret) {
                dev_err(dev, "failed to enable vdd power supply\n");
                return ret;
        }

        usleep_range(10000, 11000);

        ret = regulator_enable(priv->vddio_supply);
        if (ret < 0) {
                dev_err(dev, "failed to enable vddio power supply\n");
                return ret;
        }

        usleep_range(10000, 11000);

        renesas_r69328_reset(priv);

        priv->prepared = true;
        return 0;
}

static int renesas_r69328_enable(struct drm_panel *panel)
{
        struct renesas_r69328 *priv = to_renesas_r69328(panel);
        struct mipi_dsi_multi_context ctx = { .dsi = priv->dsi };

        /* Set address mode */
        mipi_dsi_dcs_write_seq_multi(&ctx, MIPI_DCS_SET_ADDRESS_MODE, 0x00);
        mipi_dsi_dcs_set_pixel_format_multi(&ctx, MIPI_DCS_PIXEL_FMT_24BIT << 4);
        mipi_dsi_dcs_exit_sleep_mode_multi(&ctx);

        mipi_dsi_msleep(&ctx, 100);

        /* MACP Off */
        mipi_dsi_generic_write_seq_multi(&ctx, R69328_MACP, R69328_MACP_OFF);

        mipi_dsi_generic_write_seq_multi(&ctx, R69328_POWER_SET, 0x14, 0x1d,
                                         0x21, 0x67, 0x11, 0x9a);

        mipi_dsi_generic_write_seq_multi(&ctx, R69328_GAMMA_SET_A, 0x00, 0x1a,
                                         0x20, 0x28, 0x25, 0x24, 0x26, 0x15, 0x13,
                                         0x11, 0x18, 0x1e, 0x1c, 0x00, 0x00, 0x1a,
                                         0x20, 0x28, 0x25, 0x24, 0x26, 0x15, 0x13,
                                         0x11, 0x18, 0x1e, 0x1c, 0x00);

        mipi_dsi_generic_write_seq_multi(&ctx, R69328_GAMMA_SET_B, 0x00, 0x1a,
                                         0x20, 0x28, 0x25, 0x24, 0x26, 0x15, 0x13,
                                         0x11, 0x18, 0x1e, 0x1c, 0x00, 0x00, 0x1a,
                                         0x20, 0x28, 0x25, 0x24, 0x26, 0x15, 0x13,
                                         0x11, 0x18, 0x1e, 0x1c, 0x00);

        mipi_dsi_generic_write_seq_multi(&ctx, R69328_GAMMA_SET_C, 0x00, 0x1a,
                                         0x20, 0x28, 0x25, 0x24, 0x26, 0x15, 0x13,
                                         0x11, 0x18, 0x1e, 0x1c, 0x00, 0x00, 0x1a,
                                         0x20, 0x28, 0x25, 0x24, 0x26, 0x15, 0x13,
                                         0x11, 0x18, 0x1e, 0x1c, 0x00);

        /* MACP On */
        mipi_dsi_generic_write_seq_multi(&ctx, R69328_MACP, R69328_MACP_ON);

        mipi_dsi_dcs_set_display_on_multi(&ctx);
        mipi_dsi_msleep(&ctx, 50);

        return 0;
}

static int renesas_r69328_disable(struct drm_panel *panel)
{
        struct renesas_r69328 *priv = to_renesas_r69328(panel);
        struct mipi_dsi_multi_context ctx = { .dsi = priv->dsi };

        mipi_dsi_dcs_set_display_off_multi(&ctx);
        mipi_dsi_msleep(&ctx, 60);
        mipi_dsi_dcs_enter_sleep_mode_multi(&ctx);

        return 0;
}

static int renesas_r69328_unprepare(struct drm_panel *panel)
{
        struct renesas_r69328 *priv = to_renesas_r69328(panel);

        if (!priv->prepared)
                return 0;

        gpiod_set_value_cansleep(priv->reset_gpio, 1);

        usleep_range(5000, 6000);

        regulator_disable(priv->vddio_supply);
        regulator_disable(priv->vdd_supply);

        priv->prepared = false;
        return 0;
}

static const struct drm_display_mode renesas_r69328_mode = {
        .clock = (720 + 92 + 62 + 4) * (1280 + 6 + 3 + 1) * 60 / 1000,
        .hdisplay = 720,
        .hsync_start = 720 + 92,
        .hsync_end = 720 + 92 + 62,
        .htotal = 720 + 92 + 62 + 4,
        .vdisplay = 1280,
        .vsync_start = 1280 + 6,
        .vsync_end = 1280 + 6 + 3,
        .vtotal = 1280 + 6 + 3 + 1,
        .width_mm = 59,
        .height_mm = 105,
};

static int renesas_r69328_get_modes(struct drm_panel *panel,
                                    struct drm_connector *connector)
{
        struct drm_display_mode *mode;

        mode = drm_mode_duplicate(connector->dev, &renesas_r69328_mode);
        if (!mode)
                return -ENOMEM;

        drm_mode_set_name(mode);

        mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
        connector->display_info.width_mm = mode->width_mm;
        connector->display_info.height_mm = mode->height_mm;
        drm_mode_probed_add(connector, mode);

        return 1;
}

static const struct drm_panel_funcs renesas_r69328_panel_funcs = {
        .prepare = renesas_r69328_prepare,
        .enable = renesas_r69328_enable,
        .disable = renesas_r69328_disable,
        .unprepare = renesas_r69328_unprepare,
        .get_modes = renesas_r69328_get_modes,
};

static int renesas_r69328_probe(struct mipi_dsi_device *dsi)
{
        struct device *dev = &dsi->dev;
        struct renesas_r69328 *priv;
        int ret;

        priv = devm_drm_panel_alloc(dev, struct renesas_r69328, panel,
                                    &renesas_r69328_panel_funcs,
                                    DRM_MODE_CONNECTOR_DSI);
        if (IS_ERR(priv))
                return PTR_ERR(priv);

        priv->vdd_supply = devm_regulator_get(dev, "vdd");
        if (IS_ERR(priv->vdd_supply))
                return dev_err_probe(dev, PTR_ERR(priv->vdd_supply),
                                     "Failed to get vdd-supply\n");

        priv->vddio_supply = devm_regulator_get(dev, "vddio");
        if (IS_ERR(priv->vddio_supply))
                return dev_err_probe(dev, PTR_ERR(priv->vddio_supply),
                                     "Failed to get vddio-supply\n");

        priv->reset_gpio = devm_gpiod_get_optional(dev, "reset",
                                                   GPIOD_OUT_LOW);
        if (IS_ERR(priv->reset_gpio))
                return dev_err_probe(dev, PTR_ERR(priv->reset_gpio),
                                     "Failed to get reset-gpios\n");

        priv->dsi = dsi;
        mipi_dsi_set_drvdata(dsi, priv);

        dsi->lanes = 4;
        dsi->format = MIPI_DSI_FMT_RGB888;
        dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
                          MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM;

        ret = drm_panel_of_backlight(&priv->panel);
        if (ret)
                return dev_err_probe(dev, ret, "Failed to get backlight\n");

        drm_panel_add(&priv->panel);

        ret = mipi_dsi_attach(dsi);
        if (ret) {
                drm_panel_remove(&priv->panel);
                return dev_err_probe(dev, ret, "Failed to attach to DSI host\n");
        }

        return 0;
}

static void renesas_r69328_remove(struct mipi_dsi_device *dsi)
{
        struct renesas_r69328 *priv = mipi_dsi_get_drvdata(dsi);
        int ret;

        ret = mipi_dsi_detach(dsi);
        if (ret)
                dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);

        drm_panel_remove(&priv->panel);
}

static const struct of_device_id renesas_r69328_of_match[] = {
        { .compatible = "jdi,dx12d100vm0eaa" },
        { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, renesas_r69328_of_match);

static struct mipi_dsi_driver renesas_r69328_driver = {
        .probe = renesas_r69328_probe,
        .remove = renesas_r69328_remove,
        .driver = {
                .name = "panel-renesas-r69328",
                .of_match_table = renesas_r69328_of_match,
        },
};
module_mipi_dsi_driver(renesas_r69328_driver);

MODULE_AUTHOR("Maxim Schwalm <maxim.schwalm@gmail.com>");
MODULE_AUTHOR("Svyatoslav Ryhel <clamor95@gmail.com>");
MODULE_DESCRIPTION("Renesas R69328-based panel driver");
MODULE_LICENSE("GPL");