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disp: msm: sde: add helper to check VM hw availability

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Add a utility function to check if HW has been handed over to
another VM.

Change-Id: Ic36ca1e7f15f7608e69d69fc3f4e7ad40be15704
Signed-off-by: Steve Cohen <cohens@codeaurora.org>
This commit is contained in:
Steve Cohen
2021-08-11 17:59:00 -04:00
parent 9690b545df
commit 7f3b2f0a4b
6 changed files with 40 additions and 36 deletions
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8
msm/sde/sde_connector.c
View File

@@ -131,7 +131,6 @@ static int sde_backlight_device_update_status(struct backlight_device *bd)
struct drm_event event;
int rc = 0;
struct sde_kms *sde_kms;
struct sde_vm_ops *vm_ops;
sde_kms = _sde_connector_get_kms(&c_conn->base);
if (!sde_kms) {
@@ -167,8 +166,7 @@ static int sde_backlight_device_update_status(struct backlight_device *bd)
sde_vm_lock(sde_kms);
vm_ops = sde_vm_get_ops(sde_kms);
if (vm_ops && vm_ops->vm_owns_hw && !vm_ops->vm_owns_hw(sde_kms)) {
if (!sde_vm_owns_hw(sde_kms)) {
SDE_DEBUG("skipping bl update due to HW unavailablity\n");
goto done;
}
@@ -2077,7 +2075,6 @@ static ssize_t _sde_debugfs_conn_cmd_tx_write(struct file *file,
{
struct drm_connector *connector = file->private_data;
struct sde_connector *c_conn = NULL;
struct sde_vm_ops *vm_ops;
struct sde_kms *sde_kms;
char *input, *token, *input_copy, *input_dup = NULL;
const char *delim = " ";
@@ -2107,9 +2104,8 @@ static ssize_t _sde_debugfs_conn_cmd_tx_write(struct file *file,
if (!input)
return -ENOMEM;
vm_ops = sde_vm_get_ops(sde_kms);
sde_vm_lock(sde_kms);
if (vm_ops && vm_ops->vm_owns_hw && !vm_ops->vm_owns_hw(sde_kms)) {
if (!sde_vm_owns_hw(sde_kms)) {
SDE_DEBUG("op not supported due to HW unavailablity\n");
rc = -EOPNOTSUPP;
goto end;

4
msm/sde/sde_crtc.c
View File

@@ -6451,7 +6451,6 @@ static ssize_t _sde_crtc_misr_read(struct file *file,
struct sde_crtc *sde_crtc;
struct sde_kms *sde_kms;
struct sde_crtc_mixer *m;
struct sde_vm_ops *vm_ops;
int i = 0, rc;
ssize_t len = 0;
char buf[MISR_BUFF_SIZE + 1] = {'\0'};
@@ -6472,9 +6471,8 @@ static ssize_t _sde_crtc_misr_read(struct file *file,
if (rc < 0)
return rc;
vm_ops = sde_vm_get_ops(sde_kms);
sde_vm_lock(sde_kms);
if (vm_ops && vm_ops->vm_owns_hw && !vm_ops->vm_owns_hw(sde_kms)) {
if (!sde_vm_owns_hw(sde_kms)) {
SDE_DEBUG("op not supported due to HW unavailability\n");
rc = -EOPNOTSUPP;
goto end;

8
msm/sde/sde_encoder.c
View File

@@ -4046,12 +4046,10 @@ static void sde_encoder_early_wakeup_work_handler(struct kthread_work *work)
{
struct sde_encoder_virt *sde_enc = container_of(work,
struct sde_encoder_virt, early_wakeup_work);
struct sde_vm_ops *vm_ops;
struct sde_kms *sde_kms = to_sde_kms(ddev_to_msm_kms(sde_enc->base.dev));
vm_ops = sde_vm_get_ops(sde_kms);
sde_vm_lock(sde_kms);
if (vm_ops && vm_ops->vm_owns_hw && !vm_ops->vm_owns_hw(sde_kms)) {
if (!sde_vm_owns_hw(sde_kms)) {
sde_vm_unlock(sde_kms);
SDE_DEBUG("skip early wakeup for ENC-%d, HW is owned by other VM\n",
DRMID(&sde_enc->base));
@@ -4751,7 +4749,6 @@ static ssize_t _sde_encoder_misr_read(struct file *file,
struct sde_encoder_virt *sde_enc;
struct sde_kms *sde_kms = NULL;
struct drm_encoder *drm_enc;
struct sde_vm_ops *vm_ops;
int i = 0, len = 0;
char buf[MISR_BUFF_SIZE + 1] = {'\0'};
int rc;
@@ -4777,9 +4774,8 @@ static ssize_t _sde_encoder_misr_read(struct file *file,
if (rc < 0)
return rc;
vm_ops = sde_vm_get_ops(sde_kms);
sde_vm_lock(sde_kms);
if (vm_ops && vm_ops->vm_owns_hw && !vm_ops->vm_owns_hw(sde_kms)) {
if (!sde_vm_owns_hw(sde_kms)) {
SDE_DEBUG("op not supported due to HW unavailablity\n");
rc = -EOPNOTSUPP;
goto end;

20
msm/sde/sde_kms.c
View File

@@ -2765,6 +2765,7 @@ static int sde_kms_check_vm_request(struct msm_kms *kms,
enum sde_crtc_vm_req old_vm_req = VM_REQ_NONE, new_vm_req = VM_REQ_NONE;
struct sde_vm_ops *vm_ops;
bool vm_req_active = false;
bool vm_owns_hw;
enum sde_crtc_idle_pc_state idle_pc_state;
struct sde_mdss_cfg *catalog;
int rc = 0;
@@ -2789,7 +2790,7 @@ static int sde_kms_check_vm_request(struct msm_kms *kms,
return -EINVAL;
sde_vm_lock(sde_kms);
vm_owns_hw = sde_vm_owns_hw(sde_kms);
for_each_oldnew_crtc_in_state(state, crtc, old_cstate, new_cstate, i) {
struct sde_crtc_state *old_state = NULL, *new_state = NULL;
@@ -2814,8 +2815,7 @@ static int sde_kms_check_vm_request(struct msm_kms *kms,
if (rc) {
SDE_ERROR(
"VM transition check failed; o_state:%d, n_state:%d, hw_owner:%d, rc:%d\n",
old_vm_req, new_vm_req,
vm_ops->vm_owns_hw(sde_kms), rc);
old_vm_req, new_vm_req, vm_owns_hw, rc);
goto end;
} else if (old_vm_req == VM_REQ_ACQUIRE &&
new_vm_req == VM_REQ_NONE) {
@@ -2852,9 +2852,8 @@ static int sde_kms_check_vm_request(struct msm_kms *kms,
crtc_encoder_cnt++;
}
SDE_EVT32(old_vm_req, new_vm_req, vm_ops->vm_owns_hw(sde_kms));
SDE_DEBUG("VM o_state:%d, n_state:%d, hw_owner:%d\n", old_vm_req,
new_vm_req, vm_ops->vm_owns_hw(sde_kms));
SDE_EVT32(old_vm_req, new_vm_req, vm_owns_hw);
SDE_DEBUG("VM o_state:%d, n_state:%d, hw_owner:%d\n", old_vm_req, new_vm_req, vm_owns_hw);
for_each_new_connector_in_state(state, connector, new_connstate, i) {
int conn_mask = active_cstate->connector_mask;
@@ -2903,13 +2902,12 @@ static int sde_kms_check_vm_request(struct msm_kms *kms,
goto end;
}
if ((new_vm_req == VM_REQ_ACQUIRE) && !vm_ops->vm_owns_hw(sde_kms)) {
if ((new_vm_req == VM_REQ_ACQUIRE) && !vm_owns_hw) {
rc = vm_ops->vm_acquire(sde_kms);
if (rc) {
SDE_ERROR(
"VM acquire failed; o_state:%d, n_state:%d, hw_owner:%d, rc:%d\n",
old_vm_req, new_vm_req,
vm_ops->vm_owns_hw(sde_kms), rc);
old_vm_req, new_vm_req, vm_owns_hw, rc);
goto end;
}
@@ -5065,7 +5063,6 @@ static int _sde_kms_register_events(struct msm_kms *kms,
struct drm_crtc *crtc;
struct drm_connector *conn;
struct sde_kms *sde_kms;
struct sde_vm_ops *vm_ops;
if (!kms || !obj) {
SDE_ERROR("invalid argument kms %pK obj %pK\n", kms, obj);
@@ -5073,9 +5070,8 @@ static int _sde_kms_register_events(struct msm_kms *kms,
}
sde_kms = to_sde_kms(kms);
vm_ops = sde_vm_get_ops(sde_kms);
sde_vm_lock(sde_kms);
if (vm_ops && vm_ops->vm_owns_hw && !vm_ops->vm_owns_hw(sde_kms)) {
if (!sde_vm_owns_hw(sde_kms)) {
sde_vm_unlock(sde_kms);
SDE_DEBUG("HW is owned by other VM\n");
return -EACCES;

24
msm/sde/sde_vm.h
View File

@@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2020, The Linux Foundation. All rights reserved.
* Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
*/
#ifndef __SDE_VM_H__
@@ -285,6 +285,23 @@ static inline struct sde_vm_ops *sde_vm_get_ops(struct sde_kms *sde_kms)
return &sde_kms->vm->vm_ops;
}
/**
* sde_vm_owns_hw - checks if the executing VM currently has HW ownership (caller must be holding
* the sde_vm_lock)
* @sde_kms - pointer to sde_kms
* @return - true if this VM currently owns the HW
*/
static inline bool sde_vm_owns_hw(struct sde_kms *sde_kms)
{
struct sde_vm_ops *vm_ops = sde_kms ? sde_vm_get_ops(sde_kms) : NULL;
if (vm_ops && vm_ops->vm_owns_hw)
return vm_ops->vm_owns_hw(sde_kms);
return true;
}
#else
static inline int sde_vm_primary_init(struct sde_kms *kms)
{
@@ -314,5 +331,10 @@ static inline struct sde_vm_ops *sde_vm_get_ops(struct sde_kms *sde_kms)
return NULL;
}
static inline bool sde_vm_owns_hw(struct sde_kms *sde_kms)
{
return true;
}
#endif /* IS_ENABLED(CONFIG_DRM_SDE_VM) */
#endif /* __SDE_VM_H__ */

12
msm/sde/sde_vm_common.c
View File

@@ -296,16 +296,13 @@ int sde_vm_request_valid(struct sde_kms *sde_kms,
enum sde_crtc_vm_req old_state,
enum sde_crtc_vm_req new_state)
{
struct sde_vm_ops *vm_ops;
int rc = 0;
vm_ops = &sde_kms->vm->vm_ops;
bool vm_owns_hw = sde_vm_owns_hw(sde_kms);
switch (new_state) {
case VM_REQ_RELEASE:
case VM_REQ_NONE:
if ((old_state == VM_REQ_RELEASE) ||
!vm_ops->vm_owns_hw(sde_kms))
if ((old_state == VM_REQ_RELEASE) || !vm_owns_hw)
rc = -EINVAL;
break;
case VM_REQ_ACQUIRE:
@@ -318,9 +315,8 @@ int sde_vm_request_valid(struct sde_kms *sde_kms,
};
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), rc);
SDE_EVT32(old_state, new_state, vm_ops->vm_owns_hw(sde_kms), rc);
old_state, new_state, vm_owns_hw, rc);
SDE_EVT32(old_state, new_state, vm_owns_hw, rc);
return rc;
}