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

// SPDX-License-Identifier: MIT
/*
 * Copyright(c) 2020 Intel Corporation.
 */

#include "intel_pxp.h"
#include "intel_pxp_irq.h"
#include "intel_pxp_pm.h"
#include "intel_pxp_session.h"

void intel_pxp_suspend(struct intel_pxp *pxp, bool runtime)
{
	if (!intel_pxp_is_enabled(pxp))
		return;

	pxp->arb_is_valid = false;

	/*
	 * Contexts using protected objects keep a runtime PM reference, so we
	 * can only runtime suspend when all of them have been either closed
	 * or banned. Therefore, there is no need to invalidate in that
	 * scenario.
	 */
	if (!runtime)
		intel_pxp_invalidate(pxp);

	intel_pxp_fini_hw(pxp);

	pxp->hw_state_invalidated = false;
}

void intel_pxp_resume(struct intel_pxp *pxp)
{
	if (!intel_pxp_is_enabled(pxp))
		return;

	/*
	 * The PXP component gets automatically unbound when we go into S3 and
	 * re-bound after we come out, so in that scenario we can defer the
	 * hw init to the bind call.
	 */
	if (!pxp->pxp_component)
		return;

	intel_pxp_init_hw(pxp);
}