]> Git Repo - linux.git/blob - drivers/gpu/drm/i915/display/intel_hti.c
net: wan: Add framer framework support
[linux.git] / drivers / gpu / drm / i915 / display / intel_hti.c
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 (DISPLAY_INFO(i915)->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         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
31 u32 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 }
This page took 0.036836 seconds and 4 git commands to generate.