// SPDX-License-Identifier: MIT
/*
 * Copyright © 2022 Intel Corporation
 */

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

#include "intel_de.h"
#include "intel_display.h"
#include "intel_hti.h"
#include "intel_hti_regs.h"

void intel_hti_init(struct intel_display *display)
{
        /*
         * If the platform has HTI, we need to find out whether it has reserved
         * any display resources before we create our display outputs.
         */
        if (DISPLAY_INFO(display)->has_hti)
                display->hti.state = intel_de_read(display, HDPORT_STATE);
}

bool intel_hti_uses_phy(struct intel_display *display, enum phy phy)
{
        if (drm_WARN_ON(display->drm, phy == PHY_NONE))
                return false;

        return display->hti.state & HDPORT_ENABLED &&
                display->hti.state & HDPORT_DDI_USED(phy);
}

u32 intel_hti_dpll_mask(struct intel_display *display)
{
        if (!(display->hti.state & HDPORT_ENABLED))
                return 0;

        /*
         * Note: This is subtle. The values must coincide with what's defined
         * for the platform.
         */
        return REG_FIELD_GET(HDPORT_DPLL_USED_MASK, display->hti.state);
}