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msm: camera: reqmgr: Verify the req of two links

Browse source 
The req of two links should be same if current
frame sync with previous frame of sync link, CRM can
do self-correction based on this condition.

CRs-Fixed: 2492019
Change-Id: Idb208958a850ec1fe12f12443e7ecc2e126970d8
Signed-off-by: Depeng Shao <depengs@codeaurora.org>
This commit is contained in:
Depeng Shao 2019-09-19 14:44:53 +08:00
commit 6b38f7e1bf
1 changed files with 49 additions and 4 deletions
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53
drivers/cam_req_mgr/cam_req_mgr_core.c
View file

@ -995,7 +995,8 @@ static int __cam_req_mgr_check_sync_req_is_ready(
struct cam_req_mgr_slot *slot)
{
struct cam_req_mgr_core_link *sync_link = NULL;
int64_t req_id = 0;
struct cam_req_mgr_slot *sync_rd_slot = NULL;
int64_t req_id = 0, sync_req_id = 0;
int sync_slot_idx = 0, sync_rd_idx = 0, rc = 0;
int32_t sync_num_slots = 0;
uint64_t sync_frame_duration = 0;
@ -1009,6 +1010,9 @@ static int __cam_req_mgr_check_sync_req_is_ready(
sync_link = link->sync_link;
req_id = slot->req_id;
sync_num_slots = sync_link->req.in_q->num_slots;
sync_rd_idx = sync_link->req.in_q->rd_idx;
sync_rd_slot = &sync_link->req.in_q->slot[sync_rd_idx];
sync_req_id = sync_rd_slot->req_id;
CAM_DBG(CAM_REQ,
"link_hdl %x req %lld frame_skip_flag %d ",
@ -1091,12 +1095,11 @@ static int __cam_req_mgr_check_sync_req_is_ready(
return -EAGAIN;
}
sync_rd_idx = sync_link->req.in_q->rd_idx;
if ((sync_link->req.in_q->slot[sync_slot_idx].status !=
CRM_SLOT_STATUS_REQ_APPLIED) &&
(((sync_slot_idx - sync_rd_idx + sync_num_slots) %
sync_num_slots) >= 1) &&
(sync_link->req.in_q->slot[sync_rd_idx].status !=
(sync_rd_slot->status !=
CRM_SLOT_STATUS_REQ_APPLIED)) {
CAM_DBG(CAM_CRM,
"Req: %lld [other link] not next req to be applied on link: %x",
@ -1129,7 +1132,14 @@ static int __cam_req_mgr_check_sync_req_is_ready(
CAM_DBG(CAM_CRM,
"Req: %lld ready %d sync_ready %d, ignore sync link next SOF",
req_id, ready, sync_ready);
link->sync_link_sof_skip = true;
/*
* Only skip the frames if current frame sync with
* next frame of sync link.
*/
if (link->sof_timestamp - sync_link->sof_timestamp >
sync_frame_duration / 2)
link->sync_link_sof_skip = true;
return -EINVAL;
} else if (ready == false) {
CAM_DBG(CAM_CRM,
@ -1138,6 +1148,41 @@ static int __cam_req_mgr_check_sync_req_is_ready(
return -EINVAL;
}
/*
* Do the self-correction when the frames are sync,
* we consider that the frames are synced if the
* difference of two SOF timestamp less than
* (sync_frame_duration / 5).
*/
if ((link->sof_timestamp > sync_link->sof_timestamp) &&
(sync_link->sof_timestamp > 0) &&
(link->sof_timestamp - sync_link->sof_timestamp <
sync_frame_duration / 5) &&
(sync_rd_slot->sync_mode == CAM_REQ_MGR_SYNC_MODE_SYNC)) {
/*
* This means current frame should sync with next
* frame of sync link, then the request id of in
* rd slot of two links should be same.
*/
CAM_DBG(CAM_CRM,
"link %x req_id %lld, sync_link %x req_id %lld",
link->link_hdl, req_id,
sync_link->link_hdl, sync_req_id);
if (req_id > sync_req_id) {
CAM_DBG(CAM_CRM,
"link %x too quickly, skip this frame",
link->link_hdl);
return -EAGAIN;
} else if (req_id < sync_req_id) {
CAM_DBG(CAM_CRM,
"sync link %x too quickly, skip next frame of sync link",
sync_link->link_hdl);
link->sync_link_sof_skip = true;
}
}
CAM_DBG(CAM_REQ,
"Req: %lld ready to apply on link: %x [validation successful]",
req_id, link->link_hdl);