tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2* Copyright (c) 2016 MediaTek Inc.
3* Author: Tiffany Lin <tiffany.lin@mediatek.com>
4*
5* This program is free software; you can redistribute it and/or modify
6* it under the terms of the GNU General Public License version 2 as
7* published by the Free Software Foundation.
8*
9* This program is distributed in the hope that it will be useful,
10* but WITHOUT ANY WARRANTY; without even the implied warranty of
11* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12* GNU General Public License for more details.
13*/
14
15#include <linux/errno.h>
16#include <linux/wait.h>
17
18#include "mtk_vcodec_drv.h"
19#include "mtk_vcodec_intr.h"
20#include "mtk_vcodec_util.h"
21
22int mtk_vcodec_wait_for_done_ctx(struct mtk_vcodec_ctx *ctx, int command,
23 unsigned int timeout_ms)
24{
25 wait_queue_head_t *waitqueue;
26 long timeout_jiff, ret;
27 int status = 0;
28
29 waitqueue = (wait_queue_head_t *)&ctx->queue;
30 timeout_jiff = msecs_to_jiffies(timeout_ms);
31
32 ret = wait_event_interruptible_timeout(*waitqueue,
33 (ctx->int_cond &&
34 (ctx->int_type == command)),
35 timeout_jiff);
36
37 if (!ret) {
38 status = -1; /* timeout */
39 mtk_v4l2_err("[%d] cmd=%d, ctx->type=%d, wait_event_interruptible_timeout time=%ums out %d %d!",
40 ctx->id, ctx->type, command, timeout_ms,
41 ctx->int_cond, ctx->int_type);
42 } else if (-ERESTARTSYS == ret) {
43 mtk_v4l2_err("[%d] cmd=%d, ctx->type=%d, wait_event_interruptible_timeout interrupted by a signal %d %d",
44 ctx->id, ctx->type, command, ctx->int_cond,
45 ctx->int_type);
46 status = -1;
47 }
48
49 ctx->int_cond = 0;
50 ctx->int_type = 0;
51
52 return status;
53}
54EXPORT_SYMBOL(mtk_vcodec_wait_for_done_ctx);