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 static void _pxp_resume(struct intel_pxp *pxp, bool take_wakeref)
  38 {
  39         intel_wakeref_t wakeref;
  40
  41         if (!intel_pxp_is_enabled(pxp))
  42                 return;
  43
  44         /*
  45          * The PXP component gets automatically unbound when we go into S3 and
  46          * re-bound after we come out, so in that scenario we can defer the
  47          * hw init to the bind call.
  48          * NOTE: GSC-CS backend doesn't rely on components.
  49          */
  50         if (!HAS_ENGINE(pxp->ctrl_gt, GSC0) && !pxp->pxp_component)
  51                 return;
  52
  53         if (take_wakeref)
  54                 wakeref = intel_runtime_pm_get(&pxp->ctrl_gt->i915->runtime_pm);
  55         intel_pxp_init_hw(pxp);
  56         if (take_wakeref)
  57                 intel_runtime_pm_put(&pxp->ctrl_gt->i915->runtime_pm, wakeref);
  58 }
  59
  60 void intel_pxp_resume_complete(struct intel_pxp *pxp)
  61 {
  62         _pxp_resume(pxp, true);
  63 }
  64
  65 void intel_pxp_runtime_resume(struct intel_pxp *pxp)
  66 {
  67         _pxp_resume(pxp, false);
  68 }
  69
  70 void intel_pxp_runtime_suspend(struct intel_pxp *pxp)
  71 {
  72         if (!intel_pxp_is_enabled(pxp))
  73                 return;
  74
  75         pxp->arb_is_valid = false;
  76
  77         intel_pxp_fini_hw(pxp);
  78
  79         pxp->hw_state_invalidated = false;
  80 }