1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2022 Intel Corporation 4 */ 5 6 #include <drm/drm_device.h> 7 #include <drm/drm_print.h> 8 9 #include "intel_de.h" 10 #include "intel_display.h" 11 #include "intel_hti.h" 12 #include "intel_hti_regs.h" 13 intel_hti_init(struct intel_display * display)14void intel_hti_init(struct intel_display *display) 15 { 16 /* 17 * If the platform has HTI, we need to find out whether it has reserved 18 * any display resources before we create our display outputs. 19 */ 20 if (DISPLAY_INFO(display)->has_hti) 21 display->hti.state = intel_de_read(display, HDPORT_STATE); 22 } 23 intel_hti_uses_phy(struct intel_display * display,enum phy phy)24bool intel_hti_uses_phy(struct intel_display *display, enum phy phy) 25 { 26 if (drm_WARN_ON(display->drm, phy == PHY_NONE)) 27 return false; 28 29 return display->hti.state & HDPORT_ENABLED && 30 display->hti.state & HDPORT_DDI_USED(phy); 31 } 32 intel_hti_dpll_mask(struct intel_display * display)33u32 intel_hti_dpll_mask(struct intel_display *display) 34 { 35 if (!(display->hti.state & HDPORT_ENABLED)) 36 return 0; 37 38 /* 39 * Note: This is subtle. The values must coincide with what's defined 40 * for the platform. 41 */ 42 return REG_FIELD_GET(HDPORT_DPLL_USED_MASK, display->hti.state); 43 } 44