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 (DISPLAY_INFO(i915)->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	if (drm_WARN_ON(&i915->drm, phy == PHY_NONE))
25		return false;
26
27	return i915->display.hti.state & HDPORT_ENABLED &&
28		i915->display.hti.state & HDPORT_DDI_USED(phy);
29}
30
31u32 intel_hti_dpll_mask(struct drm_i915_private *i915)
32{
33	if (!(i915->display.hti.state & HDPORT_ENABLED))
34		return 0;
35
36	/*
37	 * Note: This is subtle. The values must coincide with what's defined
38	 * for the platform.
39	 */
40	return REG_FIELD_GET(HDPORT_DPLL_USED_MASK, i915->display.hti.state);
41}
42