// SPDX-License-Identifier: MIT
/*
 * Copyright © 2018 Intel Corporation
 */

#include <drm/drm_mipi_dsi.h>
#include <drm/drm_print.h>

#include "intel_display_core.h"
#include "intel_dsi.h"
#include "intel_panel.h"

void intel_dsi_wait_panel_power_cycle(struct intel_dsi *intel_dsi)
{
        ktime_t panel_power_on_time;
        s64 panel_power_off_duration;

        panel_power_on_time = ktime_get_boottime();
        panel_power_off_duration = ktime_ms_delta(panel_power_on_time,
                                                  intel_dsi->panel_power_off_time);

        if (panel_power_off_duration < (s64)intel_dsi->panel_pwr_cycle_delay)
                msleep(intel_dsi->panel_pwr_cycle_delay - panel_power_off_duration);
}

void intel_dsi_shutdown(struct intel_encoder *encoder)
{
        struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);

        intel_dsi_wait_panel_power_cycle(intel_dsi);
}

int intel_dsi_bitrate(const struct intel_dsi *intel_dsi)
{
        int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);

        if (WARN_ON(bpp < 0))
                bpp = 16;

        return intel_dsi->pclk * bpp / intel_dsi->lane_count;
}

int intel_dsi_tlpx_ns(const struct intel_dsi *intel_dsi)
{
        switch (intel_dsi->escape_clk_div) {
        default:
        case 0:
                return 50;
        case 1:
                return 100;
        case 2:
                return 200;
        }
}

int intel_dsi_get_modes(struct drm_connector *connector)
{
        return intel_panel_get_modes(to_intel_connector(connector));
}

enum drm_mode_status intel_dsi_mode_valid(struct drm_connector *connector,
                                          const struct drm_display_mode *mode)
{
        struct intel_display *display = to_intel_display(connector->dev);
        struct intel_connector *intel_connector = to_intel_connector(connector);
        const struct drm_display_mode *fixed_mode =
                intel_panel_fixed_mode(intel_connector, mode);
        int max_dotclk = display->cdclk.max_dotclk_freq;
        enum drm_mode_status status;

        drm_dbg_kms(display->drm, "\n");

        status = intel_panel_mode_valid(intel_connector, mode);
        if (status != MODE_OK)
                return status;

        if (fixed_mode->clock > max_dotclk)
                return MODE_CLOCK_HIGH;

        return intel_mode_valid_max_plane_size(display, mode, 1);
}

struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi,
                                           const struct mipi_dsi_host_ops *funcs,
                                           enum port port)
{
        struct intel_dsi_host *host;
        struct mipi_dsi_device *device;

        host = kzalloc_obj(*host);
        if (!host)
                return NULL;

        host->base.ops = funcs;
        host->intel_dsi = intel_dsi;
        host->port = port;

        /*
         * We should call mipi_dsi_host_register(&host->base) here, but we don't
         * have a host->dev, and we don't have OF stuff either. So just use the
         * dsi framework as a library and hope for the best. Create the dsi
         * devices by ourselves here too. Need to be careful though, because we
         * don't initialize any of the driver model devices here.
         */
        device = kzalloc_obj(*device);
        if (!device) {
                kfree(host);
                return NULL;
        }

        device->host = &host->base;
        host->device = device;

        return host;
}

enum drm_panel_orientation
intel_dsi_get_panel_orientation(struct intel_connector *connector)
{
        struct intel_display *display = to_intel_display(connector);
        enum drm_panel_orientation orientation;

        orientation = connector->panel.vbt.dsi.orientation;
        if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
                return orientation;

        orientation = display->vbt.orientation;
        if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
                return orientation;

        return DRM_MODE_PANEL_ORIENTATION_NORMAL;
}