root/drivers/media/pci/cx18/cx18-alsa.h

INCLUDED FROM

DEFINITIONS

1. snd_cx18_lock
2. snd_cx18_unlock

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *  ALSA interface to cx18 PCM capture streams
   4  *
   5  *  Copyright (C) 2009  Andy Walls <awalls@md.metrocast.net>
   6  */
   7 
   8 struct snd_card;
   9 
  10 struct snd_cx18_card {
  11         struct v4l2_device *v4l2_dev;
  12         struct snd_card *sc;
  13         unsigned int capture_transfer_done;
  14         unsigned int hwptr_done_capture;
  15         struct snd_pcm_substream *capture_pcm_substream;
  16         spinlock_t slock;
  17 };
  18 
  19 extern int cx18_alsa_debug;
  20 
  21 /*
  22  * File operations that manipulate the encoder or video or audio subdevices
  23  * need to be serialized.  Use the same lock we use for v4l2 file ops.
  24  */
  25 static inline void snd_cx18_lock(struct snd_cx18_card *cxsc)
  26 {
  27         struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
  28         mutex_lock(&cx->serialize_lock);
  29 }
  30 
  31 static inline void snd_cx18_unlock(struct snd_cx18_card *cxsc)
  32 {
  33         struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
  34         mutex_unlock(&cx->serialize_lock);
  35 }
  36 
  37 #define CX18_ALSA_DBGFLG_WARN  (1 << 0)
  38 #define CX18_ALSA_DBGFLG_INFO  (1 << 1)
  39 
  40 #define CX18_ALSA_DEBUG(x, type, fmt, args...) \
  41         do { \
  42                 if ((x) & cx18_alsa_debug) \
  43                         printk(KERN_INFO "%s-alsa: " type ": " fmt, \
  44                                 v4l2_dev->name , ## args); \
  45         } while (0)
  46 
  47 #define CX18_ALSA_DEBUG_WARN(fmt, args...) \
  48         CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_WARN, "warning", fmt , ## args)
  49 
  50 #define CX18_ALSA_DEBUG_INFO(fmt, args...) \
  51         CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_INFO, "info", fmt , ## args)
  52 
  53 #define CX18_ALSA_ERR(fmt, args...) \
  54         printk(KERN_ERR "%s-alsa: " fmt, v4l2_dev->name , ## args)
  55 
  56 #define CX18_ALSA_WARN(fmt, args...) \
  57         printk(KERN_WARNING "%s-alsa: " fmt, v4l2_dev->name , ## args)
  58 
  59 #define CX18_ALSA_INFO(fmt, args...) \
  60         printk(KERN_INFO "%s-alsa: " fmt, v4l2_dev->name , ## args)