1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2023 Intel Corporation 4 */ 5 6 #include "i915_drv.h" 7 #include "i915_reg.h" 8 #include "intel_de.h" 9 #include "intel_display_wa.h" 10 11 static void gen11_display_wa_apply(struct drm_i915_private *i915) 12 { 13 /* Wa_14010594013 */ 14 intel_de_rmw(i915, GEN8_CHICKEN_DCPR_1, 0, ICL_DELAY_PMRSP); 15 } 16 17 static void xe_d_display_wa_apply(struct drm_i915_private *i915) 18 { 19 /* Wa_14013723622 */ 20 intel_de_rmw(i915, CLKREQ_POLICY, CLKREQ_POLICY_MEM_UP_OVRD, 0); 21 } 22 23 static void adlp_display_wa_apply(struct drm_i915_private *i915) 24 { 25 /* Wa_22011091694:adlp */ 26 intel_de_rmw(i915, GEN9_CLKGATE_DIS_5, 0, DPCE_GATING_DIS); 27 28 /* Bspec/49189 Initialize Sequence */ 29 intel_de_rmw(i915, GEN8_CHICKEN_DCPR_1, DDI_CLOCK_REG_ACCESS, 0); 30 } 31 32 void intel_display_wa_apply(struct drm_i915_private *i915) 33 { 34 if (IS_ALDERLAKE_P(i915)) 35 adlp_display_wa_apply(i915); 36 else if (DISPLAY_VER(i915) == 12) 37 xe_d_display_wa_apply(i915); 38 else if (DISPLAY_VER(i915) == 11) 39 gen11_display_wa_apply(i915); 40 } 41