drivers/gpu/drm/i915/pxp/intel_pxp_pm.c

   1 // SPDX-License-Identifier: MIT
   2 /*
   3  * Copyright(c) 2020 Intel Corporation.
   4  */
   5
   6 #include "intel_pxp.h"
   7 #include "intel_pxp_irq.h"
   8 #include "intel_pxp_pm.h"
   9 #include "intel_pxp_session.h"
  10 #include "i915_drv.h"
  11
  12 void intel_pxp_suspend_prepare(struct intel_pxp *pxp)
  13 {
  14         if (!intel_pxp_is_enabled(pxp))
  15                 return;
  16
  17         pxp->arb_is_valid = false;
  18
  19         intel_pxp_invalidate(pxp);
  20 }
  21
  22 void intel_pxp_suspend(struct intel_pxp *pxp)
  23 {
  24         intel_wakeref_t wakeref;
  25
  26         if (!intel_pxp_is_enabled(pxp))
  27                 return;
  28
  29         with_intel_runtime_pm(&pxp_to_gt(pxp)->i915->runtime_pm, wakeref) {
  30                 intel_pxp_fini_hw(pxp);
  31                 pxp->hw_state_invalidated = false;
  32         }
  33 }
  34
  35 void intel_pxp_resume(struct intel_pxp *pxp)
  36 {
  37         if (!intel_pxp_is_enabled(pxp))
  38                 return;
  39
  40         /*
  41          * The PXP component gets automatically unbound when we go into S3 and
  42          * re-bound after we come out, so in that scenario we can defer the
  43          * hw init to the bind call.
  44          */
  45         if (!pxp->pxp_component)
  46                 return;
  47
  48         intel_pxp_init_hw(pxp);
  49 }
  50
  51 void intel_pxp_runtime_suspend(struct intel_pxp *pxp)
  52 {
  53         if (!intel_pxp_is_enabled(pxp))
  54                 return;
  55
  56         pxp->arb_is_valid = false;
  57
  58         intel_pxp_fini_hw(pxp);
  59
  60         pxp->hw_state_invalidated = false;
  61 }