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msm: vidc: Add memory barrier after queue header update

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Add memory barrier after updating queue header variables
to ensure main memory is updated so that video hardware
reads the updated header values.

CRs-Fixed: 2135048
Change-Id: I1a2778bee16c9093284c4d33980e6985c279f499
Signed-off-by: Vikash Garodia <vgarodia@codeaurora.org>
Signed-off-by: Sanjay Singh <sisanj@codeaurora.org>
This commit is contained in:
Maheshwar Ajja 2017-11-17 15:04:28 +05:30 • committed by Sanjay Singh
parent 412b07f4da
commit 7fef9d4e2d
1 changed files with 10 additions and 0 deletions
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10
drivers/media/platform/msm/vidc/venus_hfi.c
View file

@ -501,6 +501,11 @@ static int __read_queue(struct vidc_iface_q_info *qinfo, u8 *packet,
if (queue->qhdr_read_idx == queue->qhdr_write_idx) {
queue->qhdr_rx_req = receive_request;
/*
* mb() to ensure qhdr is updated in main memory
* so that venus reads the updated header values
*/
mb();
*pb_tx_req_is_set = 0;
dprintk(VIDC_DBG,
"%s queue is empty, rx_req = %u, tx_req = %u, read_idx = %u\n",
@ -548,6 +553,11 @@ static int __read_queue(struct vidc_iface_q_info *qinfo, u8 *packet,
queue->qhdr_rx_req = 0;
else
queue->qhdr_rx_req = receive_request;
/*
* mb() to ensure qhdr is updated in main memory
* so that venus reads the updated header values
*/
mb();
*pb_tx_req_is_set = (1 == queue->qhdr_tx_req) ? 1 : 0;