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 "i915_drv.h"
   7
   8 #include "intel_pxp.h"
   9 #include "intel_pxp_irq.h"
  10 #include "intel_pxp_pm.h"
  11 #include "intel_pxp_session.h"
  12 #include "intel_pxp_types.h"
  13
  14 void intel_pxp_suspend_prepare(struct intel_pxp *pxp)
  15 {
  16         if (!intel_pxp_is_enabled(pxp))
  17                 return;
  18
  19         intel_pxp_end(pxp);
  20
  21         intel_pxp_invalidate(pxp);
  22 }
  23
  24 void intel_pxp_suspend(struct intel_pxp *pxp)
  25 {
  26         intel_wakeref_t wakeref;
  27
  28         if (!intel_pxp_is_enabled(pxp))
  29                 return;
  30
  31         with_intel_runtime_pm(&pxp->ctrl_gt->i915->runtime_pm, wakeref) {
  32                 intel_pxp_fini_hw(pxp);
  33                 pxp->hw_state_invalidated = false;
  34         }
  35 }
  36
  37 void intel_pxp_resume_complete(struct intel_pxp *pxp)
  38 {
  39         if (!intel_pxp_is_enabled(pxp))
  40                 return;
  41
  42         /*
  43          * The PXP component gets automatically unbound when we go into S3 and
  44          * re-bound after we come out, so in that scenario we can defer the
  45          * hw init to the bind call.
  46          * NOTE: GSC-CS backend doesn't rely on components.
  47          */
  48         if (!HAS_ENGINE(pxp->ctrl_gt, GSC0) && !pxp->pxp_component)
  49                 return;
  50
  51         intel_pxp_init_hw(pxp);
  52 }
  53
  54 void intel_pxp_runtime_suspend(struct intel_pxp *pxp)
  55 {
  56         if (!intel_pxp_is_enabled(pxp))
  57                 return;
  58
  59         pxp->arb_is_valid = false;
  60
  61         intel_pxp_fini_hw(pxp);
  62
  63         pxp->hw_state_invalidated = false;
  64 }