ALSA: docs: Update document about the default PCM ioctl ops
Mention that it's completely optional now. Link: https://lore.kernel.org/r/20191117085308.23915-5-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
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@ -1341,7 +1341,6 @@ shows only the skeleton, how to build up the PCM interfaces.
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static struct snd_pcm_ops snd_mychip_playback_ops = {
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.open = snd_mychip_playback_open,
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.close = snd_mychip_playback_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = snd_mychip_pcm_hw_params,
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.hw_free = snd_mychip_pcm_hw_free,
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.prepare = snd_mychip_pcm_prepare,
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@ -1353,7 +1352,6 @@ shows only the skeleton, how to build up the PCM interfaces.
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static struct snd_pcm_ops snd_mychip_capture_ops = {
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.open = snd_mychip_capture_open,
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.close = snd_mychip_capture_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = snd_mychip_pcm_hw_params,
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.hw_free = snd_mychip_pcm_hw_free,
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.prepare = snd_mychip_pcm_prepare,
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@ -1456,7 +1454,6 @@ The operators are defined typically like this:
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static struct snd_pcm_ops snd_mychip_playback_ops = {
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.open = snd_mychip_pcm_open,
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.close = snd_mychip_pcm_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = snd_mychip_pcm_hw_params,
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.hw_free = snd_mychip_pcm_hw_free,
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.prepare = snd_mychip_pcm_prepare,
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@ -1913,7 +1910,10 @@ ioctl callback
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~~~~~~~~~~~~~~
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This is used for any special call to pcm ioctls. But usually you can
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pass a generic ioctl callback, :c:func:`snd_pcm_lib_ioctl()`.
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leave it as NULL, then PCM core calls the generic ioctl callback
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function :c:func:`snd_pcm_lib_ioctl()`. If you need to deal with the
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unique setup of channel info or reset procedure, you can pass your own
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callback function here.
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hw_params callback
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~~~~~~~~~~~~~~~~~~~
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