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

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3 * Copyright (c) 2016 MediaTek Inc.
   4 * Author: Tiffany Lin <tiffany.lin@mediatek.com>
   5 */
   6
   7 #include <linux/errno.h>
   8 #include <linux/wait.h>
   9
  10 #include "mtk_vcodec_drv.h"
  11 #include "mtk_vcodec_intr.h"
  12 #include "mtk_vcodec_util.h"
  13
  14 int mtk_vcodec_wait_for_done_ctx(struct mtk_vcodec_ctx  *ctx, int command,
  15                                  unsigned int timeout_ms)
  16 {
  17         wait_queue_head_t *waitqueue;
  18         long timeout_jiff, ret;
  19         int status = 0;
  20
  21         waitqueue = (wait_queue_head_t *)&ctx->queue;
  22         timeout_jiff = msecs_to_jiffies(timeout_ms);
  23
  24         ret = wait_event_interruptible_timeout(*waitqueue,
  25                                 ctx->int_cond,
  26                                 timeout_jiff);
  27
  28         if (!ret) {
  29                 status = -1;    /* timeout */
  30                 mtk_v4l2_err("[%d] cmd=%d, ctx->type=%d, wait_event_interruptible_timeout time=%ums out %d %d!",
  31                                 ctx->id, ctx->type, command, timeout_ms,
  32                                 ctx->int_cond, ctx->int_type);
  33         } else if (-ERESTARTSYS == ret) {
  34                 mtk_v4l2_err("[%d] cmd=%d, ctx->type=%d, wait_event_interruptible_timeout interrupted by a signal %d %d",
  35                                 ctx->id, ctx->type, command, ctx->int_cond,
  36                                 ctx->int_type);
  37                 status = -1;
  38         }
  39
  40         ctx->int_cond = 0;
  41         ctx->int_type = 0;
  42
  43         return status;
  44 }
  45 EXPORT_SYMBOL(mtk_vcodec_wait_for_done_ctx);