LXR linux/drivers/media/pci/ivtv/ivtv-alsa.h

   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
   9struct snd_card;
  10
  11struct 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
  20extern 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 */
  26static 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
  32static 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)
  62