drivers/gpu/drm/i915/display/intel_display_wa.c

   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 }