// SPDX-License-Identifier: GPL-2.0
/*
 *  Copyright (C) 2019 Texas Instruments Incorporated - https://www.ti.com
 *  Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
 */

#include <linux/module.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>

#include <drm/drm_crtc.h>
#include <drm/drm_device.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_panel.h>

#include <video/mipi_display.h>

struct osd101t2587_panel {
        struct drm_panel base;
        struct mipi_dsi_device *dsi;

        struct regulator *supply;

        const struct drm_display_mode *default_mode;
};

static inline struct osd101t2587_panel *ti_osd_panel(struct drm_panel *panel)
{
        return container_of(panel, struct osd101t2587_panel, base);
}

static int osd101t2587_panel_disable(struct drm_panel *panel)
{
        struct osd101t2587_panel *osd101t2587 = ti_osd_panel(panel);
        int ret;

        ret = mipi_dsi_shutdown_peripheral(osd101t2587->dsi);

        return ret;
}

static int osd101t2587_panel_unprepare(struct drm_panel *panel)
{
        struct osd101t2587_panel *osd101t2587 = ti_osd_panel(panel);

        regulator_disable(osd101t2587->supply);

        return 0;
}

static int osd101t2587_panel_prepare(struct drm_panel *panel)
{
        struct osd101t2587_panel *osd101t2587 = ti_osd_panel(panel);

        return regulator_enable(osd101t2587->supply);
}

static int osd101t2587_panel_enable(struct drm_panel *panel)
{
        struct osd101t2587_panel *osd101t2587 = ti_osd_panel(panel);
        int ret;

        ret = mipi_dsi_turn_on_peripheral(osd101t2587->dsi);
        if (ret)
                return ret;

        return ret;
}

static const struct drm_display_mode default_mode_osd101t2587 = {
        .clock = 164400,
        .hdisplay = 1920,
        .hsync_start = 1920 + 152,
        .hsync_end = 1920 + 152 + 52,
        .htotal = 1920 + 152 + 52 + 20,
        .vdisplay = 1200,
        .vsync_start = 1200 + 24,
        .vsync_end = 1200 + 24 + 6,
        .vtotal = 1200 + 24 + 6 + 48,
        .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
};

static int osd101t2587_panel_get_modes(struct drm_panel *panel,
                                       struct drm_connector *connector)
{
        struct osd101t2587_panel *osd101t2587 = ti_osd_panel(panel);
        struct drm_display_mode *mode;

        mode = drm_mode_duplicate(connector->dev, osd101t2587->default_mode);
        if (!mode) {
                dev_err(panel->dev, "failed to add mode %ux%ux@%u\n",
                        osd101t2587->default_mode->hdisplay,
                        osd101t2587->default_mode->vdisplay,
                        drm_mode_vrefresh(osd101t2587->default_mode));
                return -ENOMEM;
        }

        drm_mode_set_name(mode);

        drm_mode_probed_add(connector, mode);

        connector->display_info.width_mm = 217;
        connector->display_info.height_mm = 136;

        return 1;
}

static const struct drm_panel_funcs osd101t2587_panel_funcs = {
        .disable = osd101t2587_panel_disable,
        .unprepare = osd101t2587_panel_unprepare,
        .prepare = osd101t2587_panel_prepare,
        .enable = osd101t2587_panel_enable,
        .get_modes = osd101t2587_panel_get_modes,
};

static const struct of_device_id osd101t2587_of_match[] = {
        {
                .compatible = "osddisplays,osd101t2587-53ts",
                .data = &default_mode_osd101t2587,
        }, {
                /* sentinel */
        }
};
MODULE_DEVICE_TABLE(of, osd101t2587_of_match);

static int osd101t2587_panel_add(struct osd101t2587_panel *osd101t2587)
{
        struct device *dev = &osd101t2587->dsi->dev;
        int ret;

        osd101t2587->supply = devm_regulator_get(dev, "power");
        if (IS_ERR(osd101t2587->supply))
                return PTR_ERR(osd101t2587->supply);

        ret = drm_panel_of_backlight(&osd101t2587->base);
        if (ret)
                return ret;

        drm_panel_add(&osd101t2587->base);

        return 0;
}

static int osd101t2587_panel_probe(struct mipi_dsi_device *dsi)
{
        struct osd101t2587_panel *osd101t2587;
        const struct of_device_id *id;
        int ret;

        id = of_match_node(osd101t2587_of_match, dsi->dev.of_node);
        if (!id)
                return -ENODEV;

        dsi->lanes = 4;
        dsi->format = MIPI_DSI_FMT_RGB888;
        dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
                          MIPI_DSI_MODE_VIDEO_BURST |
                          MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
                          MIPI_DSI_MODE_NO_EOT_PACKET;

        osd101t2587 = devm_drm_panel_alloc(&dsi->dev, __typeof(*osd101t2587), base,
                                           &osd101t2587_panel_funcs,
                                           DRM_MODE_CONNECTOR_DSI);

        if (IS_ERR(osd101t2587))
                return PTR_ERR(osd101t2587);

        mipi_dsi_set_drvdata(dsi, osd101t2587);

        osd101t2587->dsi = dsi;
        osd101t2587->default_mode = id->data;

        ret = osd101t2587_panel_add(osd101t2587);
        if (ret < 0)
                return ret;

        ret = mipi_dsi_attach(dsi);
        if (ret)
                drm_panel_remove(&osd101t2587->base);

        return ret;
}

static void osd101t2587_panel_remove(struct mipi_dsi_device *dsi)
{
        struct osd101t2587_panel *osd101t2587 = mipi_dsi_get_drvdata(dsi);
        int ret;

        drm_panel_remove(&osd101t2587->base);

        ret = mipi_dsi_detach(dsi);
        if (ret < 0)
                dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
}

static struct mipi_dsi_driver osd101t2587_panel_driver = {
        .driver = {
                .name = "panel-osd-osd101t2587-53ts",
                .of_match_table = osd101t2587_of_match,
        },
        .probe = osd101t2587_panel_probe,
        .remove = osd101t2587_panel_remove,
};
module_mipi_dsi_driver(osd101t2587_panel_driver);

MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
MODULE_DESCRIPTION("OSD101T2587-53TS DSI panel");
MODULE_LICENSE("GPL v2");