root/drivers/media/pci/ivtv/ivtv-alsa.h

INCLUDED FROM

DEFINITIONS

1. snd_ivtv_lock
2. snd_ivtv_unlock

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *  ALSA interface to ivtv PCM capture streams
   4  *
   5  *  Copyright (C) 2009,2012  Andy Walls <awalls@md.metrocast.net>
   6  *  Copyright (C) 2009  Devin Heitmueller <dheitmueller@kernellabs.com>
   7  */
   8 
   9 struct snd_card;
  10 
  11 struct snd_ivtv_card {
  12         struct v4l2_device *v4l2_dev;
  13         struct snd_card *sc;
  14         unsigned int capture_transfer_done;
  15         unsigned int hwptr_done_capture;
  16         struct snd_pcm_substream *capture_pcm_substream;
  17         spinlock_t slock;
  18 };
  19 
  20 extern int ivtv_alsa_debug;
  21 
  22 /*
  23  * File operations that manipulate the encoder or video or audio subdevices
  24  * need to be serialized.  Use the same lock we use for v4l2 file ops.
  25  */
  26 static inline void snd_ivtv_lock(struct snd_ivtv_card *itvsc)
  27 {
  28         struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
  29         mutex_lock(&itv->serialize_lock);
  30 }
  31 
  32 static inline void snd_ivtv_unlock(struct snd_ivtv_card *itvsc)
  33 {
  34         struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
  35         mutex_unlock(&itv->serialize_lock);
  36 }
  37 
  38 #define IVTV_ALSA_DBGFLG_WARN  (1 << 0)
  39 #define IVTV_ALSA_DBGFLG_INFO  (1 << 1)
  40 
  41 #define IVTV_ALSA_DEBUG(x, type, fmt, args...) \
  42         do { \
  43                 if ((x) & ivtv_alsa_debug) \
  44                         pr_info("%s-alsa: " type ": " fmt, \
  45                                 v4l2_dev->name , ## args); \
  46         } while (0)
  47 
  48 #define IVTV_ALSA_DEBUG_WARN(fmt, args...) \
  49         IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_WARN, "warning", fmt , ## args)
  50 
  51 #define IVTV_ALSA_DEBUG_INFO(fmt, args...) \
  52         IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_INFO, "info", fmt , ## args)
  53 
  54 #define IVTV_ALSA_ERR(fmt, args...) \
  55         pr_err("%s-alsa: " fmt, v4l2_dev->name , ## args)
  56 
  57 #define IVTV_ALSA_WARN(fmt, args...) \
  58         pr_warn("%s-alsa: " fmt, v4l2_dev->name , ## args)
  59 
  60 #define IVTV_ALSA_INFO(fmt, args...) \
  61         pr_info("%s-alsa: " fmt, v4l2_dev->name , ## args)