1// SPDX-License-Identifier: MIT
 2/*
 3 * Copyright © 2022 Intel Corporation
 4 */
 5
 6#include "i915_drv.h"
 7#include "intel_de.h"
 8#include "intel_display.h"
 9#include "intel_hti.h"
10#include "intel_hti_regs.h"
11
12void intel_hti_init(struct drm_i915_private *i915)
13{
14	/*
15	 * If the platform has HTI, we need to find out whether it has reserved
16	 * any display resources before we create our display outputs.
17	 */
18	if (INTEL_INFO(i915)->display.has_hti)
19		i915->display.hti.state = intel_de_read(i915, HDPORT_STATE);
20}
21
22bool intel_hti_uses_phy(struct drm_i915_private *i915, enum phy phy)
23{
24	return i915->display.hti.state & HDPORT_ENABLED &&
25		i915->display.hti.state & HDPORT_DDI_USED(phy);
26}
27
28u32 intel_hti_dpll_mask(struct drm_i915_private *i915)
29{
30	if (!(i915->display.hti.state & HDPORT_ENABLED))
31		return 0;
32
33	/*
34	 * Note: This is subtle. The values must coincide with what's defined
35	 * for the platform.
36	 */
37	return REG_FIELD_GET(HDPORT_DPLL_USED_MASK, i915->display.hti.state);
38}