1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2023 Intel Corporation 4 */ 5 6 #include <drm/drm_print.h> 7 8 #include "i915_reg.h" 9 #include "intel_de.h" 10 #include "intel_display_core.h" 11 #include "intel_display_regs.h" 12 #include "intel_display_wa.h" 13 14 static void gen11_display_wa_apply(struct intel_display *display) 15 { 16 /* Wa_14010594013 */ 17 intel_de_rmw(display, GEN8_CHICKEN_DCPR_1, 0, ICL_DELAY_PMRSP); 18 } 19 20 static void xe_d_display_wa_apply(struct intel_display *display) 21 { 22 /* Wa_14013723622 */ 23 intel_de_rmw(display, CLKREQ_POLICY, CLKREQ_POLICY_MEM_UP_OVRD, 0); 24 } 25 26 static void adlp_display_wa_apply(struct intel_display *display) 27 { 28 /* Wa_22011091694:adlp */ 29 intel_de_rmw(display, GEN9_CLKGATE_DIS_5, 0, DPCE_GATING_DIS); 30 31 /* Bspec/49189 Initialize Sequence */ 32 intel_de_rmw(display, GEN8_CHICKEN_DCPR_1, DDI_CLOCK_REG_ACCESS, 0); 33 } 34 35 void intel_display_wa_apply(struct intel_display *display) 36 { 37 if (display->platform.alderlake_p) 38 adlp_display_wa_apply(display); 39 else if (DISPLAY_VER(display) == 12) 40 xe_d_display_wa_apply(display); 41 else if (DISPLAY_VER(display) == 11) 42 gen11_display_wa_apply(display); 43 } 44 45 /* 46 * Wa_16025573575: 47 * Fixes: Issue with bitbashing on Xe3 based platforms. 48 * Workaround: Set masks bits in GPIO CTL and preserve it during bitbashing sequence. 49 */ 50 static bool intel_display_needs_wa_16025573575(struct intel_display *display) 51 { 52 return DISPLAY_VERx100(display) == 3000 || DISPLAY_VERx100(display) == 3002 || 53 DISPLAY_VERx100(display) == 3500; 54 } 55 56 /* 57 * Wa_14011503117: 58 * Fixes: Before enabling the scaler DE fatal error is masked 59 * Workaround: Unmask the DE fatal error register after enabling the scaler 60 * and after waiting of at least 1 frame. 61 */ 62 bool __intel_display_wa(struct intel_display *display, enum intel_display_wa wa, const char *name) 63 { 64 switch (wa) { 65 case INTEL_DISPLAY_WA_16023588340: 66 return intel_display_needs_wa_16023588340(display); 67 case INTEL_DISPLAY_WA_16025573575: 68 return intel_display_needs_wa_16025573575(display); 69 case INTEL_DISPLAY_WA_14011503117: 70 return DISPLAY_VER(display) == 13; 71 case INTEL_DISPLAY_WA_22014263786: 72 return IS_DISPLAY_VERx100(display, 1100, 1400); 73 default: 74 drm_WARN(display->drm, 1, "Missing Wa number: %s\n", name); 75 break; 76 } 77 78 return false; 79 } 80