| 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 | } |
| 42 |