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disp: msm: sde: accept and reclaim resources on user prompt

Bladeren bron 
Currently, trusted VM accepts and releases the resources
on RM notifications.

In cases, where TUI fails to submit the first frame on the trusted
vm, display cannot rely on the teardown commit IOCTL to release the
resources back to primary VM.

To handle scenarios where RM notification drops, the VM's should be
able to ACCEPT/RECLAIM resources without relying on the RM.

To address above scenarios, this change moves the resource handling
calls from notification handlers to user prompt. With this change,
trusted VM will ACCEPT the resource only on the first frame commit and
primary VM can RECLAIM the resources back if the TUI use case fails
or any of the RM notifications fail to deliver.

Change-Id: Iebb1724a7558e52567f8af1a49e38f8adbec88a0
Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>
This commit is contained in:
Jeykumar Sankaran
2020-08-11 09:58:04 -07:00
gecommit door Gerrit - the friendly Code Review server
bovenliggende de8c973a73
commit 9de6eee40e
5 gewijzigde bestanden met toevoegingen van 364 en 251 verwijderingen
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27
msm/sde/sde_vm_common.c
Bestand weergeven

@@ -300,33 +300,30 @@ int sde_vm_request_valid(struct sde_kms *sde_kms,
switch (new_state) {
case VM_REQ_RELEASE:
if (old_state == VM_REQ_RELEASE)
rc = -EINVAL;
break;
case VM_REQ_NONE:
if (old_state == VM_REQ_RELEASE)
if ((old_state == VM_REQ_RELEASE) ||
!vm_ops->vm_owns_hw(sde_kms))
rc = -EINVAL;
break;
case VM_REQ_ACQUIRE:
/**
* Only the display which requested for HW assignment
* can reclaim it back
*/
if (old_state != VM_REQ_RELEASE)
if (old_state != VM_REQ_RELEASE) {
rc = -EINVAL;
} else if (!vm_ops->vm_owns_hw(sde_kms)) {
if (vm_ops->vm_acquire)
rc = vm_ops->vm_acquire(sde_kms);
else
rc = -EINVAL;
}
break;
default:
SDE_ERROR("invalid vm request\n");
rc = -EINVAL;
};
if (!rc && !vm_ops->vm_owns_hw(sde_kms))
rc = -EINVAL;
SDE_DEBUG("old req: %d new req: %d owns_hw: %d\n",
SDE_DEBUG("old req: %d new req: %d owns_hw: %d, rc: %d\n",
old_state, new_state,
vm_ops->vm_owns_hw(sde_kms));
SDE_EVT32(old_state, new_state, vm_ops->vm_owns_hw(sde_kms));
vm_ops->vm_owns_hw(sde_kms), rc);
SDE_EVT32(old_state, new_state, vm_ops->vm_owns_hw(sde_kms), rc);
return rc;
}