/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * ALSA interface to ivtv PCM capture streams * * Copyright (C) 2009,2012 Andy Walls <awalls@md.metrocast.net> * Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com> */ struct snd_card; struct snd_ivtv_card { struct v4l2_device *v4l2_dev; struct snd_card *sc; unsigned int capture_transfer_done; unsigned int hwptr_done_capture; struct snd_pcm_substream *capture_pcm_substream; spinlock_t slock; }; extern int ivtv_alsa_debug; /* * File operations that manipulate the encoder or video or audio subdevices * need to be serialized. Use the same lock we use for v4l2 file ops. */ static inline void snd_ivtv_lock(struct snd_ivtv_card *itvsc) { struct ivtv *itv = to_ivtv(itvsc->v4l2_dev); mutex_lock(&itv->serialize_lock); } static inline void snd_ivtv_unlock(struct snd_ivtv_card *itvsc) { struct ivtv *itv = to_ivtv(itvsc->v4l2_dev); mutex_unlock(&itv->serialize_lock); } #define IVTV_ALSA_DBGFLG_WARN (1 << 0) #define IVTV_ALSA_DBGFLG_INFO (1 << 1) #define IVTV_ALSA_DEBUG(x, type, fmt, args...) \ do { \ if ((x) & ivtv_alsa_debug) \ pr_info("%s-alsa: " type ": " fmt, \ v4l2_dev->name , ## args); \ } while (0) #define IVTV_ALSA_DEBUG_WARN(fmt, args...) \ IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_WARN, "warning", fmt , ## args) #define IVTV_ALSA_DEBUG_INFO(fmt, args...) \ IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_INFO, "info", fmt , ## args) #define IVTV_ALSA_ERR(fmt, args...) \ pr_err("%s-alsa: " fmt, v4l2_dev->name , ## args) #define IVTV_ALSA_WARN(fmt, args...) \ pr_warn("%s-alsa: " fmt, v4l2_dev->name , ## args) #define IVTV_ALSA_INFO(fmt, args...) \ pr_info("%s-alsa: " fmt, v4l2_dev->name , ## args)