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 
12 void 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 
22 bool 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 
28 u32 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 }
39