drivers/media/platform/mtk-vcodec/mtk_vcodec_intr.c

   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
  22 int 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 }
  54 EXPORT_SYMBOL(mtk_vcodec_wait_for_done_ctx);