include/sound/soc-dai.h

1 /* SPDX-License-Identifier: GPL-2.0
3  * linux/sound/soc-dai.h -- ALSA SoC Layer
5  * Copyright:	2005-2008 Wolfson Microelectronics. PLC.
66  * define GATED -> CONT. GATED will be selected if both are selected.
82  * - "normal" polarity means signal is available at rising edge of BCLK
83  * - "inverted" polarity means signal is available at falling edge of BCLK
85  * FSYNC "normal" polarity depends on the frame format:
86  * - I2S: frame consists of left then right channel data. Left channel starts
87  *      with falling FSYNC edge, right channel starts with rising FSYNC edge.
88  * - Left/Right Justified: frame consists of left then right channel data.
89  *      Left channel starts with rising FSYNC edge, right channel starts with
90  *      falling FSYNC edge.
91  * - DSP A/B: Frame starts with rising FSYNC edge.
92  * - AC97: Frame starts with rising FSYNC edge.
94  * "Negative" FSYNC polarity is the one opposite of "normal" polarity.
121 /* previous definitions kept for backwards-compatibility, do not use in new contributions */
233 	snd_soc_dai_action(dai, stream, -1);  in snd_soc_dai_deactivate()
320 	 * DAI digital mute - optional.
321 	 * Called by soc-core to minimise any pops.
326 	 * ALSA PCM audio operations - all optional.
327 	 * Called by soc-core during audio PCM operations.
367 	/* probe ordering - for components with runtime dependencies */
456 	/* Symmetry data - only valid if symmetry is being enforced */
480 		&dai->driver->playback : &dai->driver->capture;  in snd_soc_dai_get_pcm_stream()
488 	return dai->stream[stream].widget;  in snd_soc_dai_get_widget()
496 	dai->stream[stream].widget = widget;  in snd_soc_dai_set_widget()
501 #define snd_soc_dai_get_dma_data(dai, ss)	snd_soc_dai_dma_data_get(dai, ss->stream)
504 	return dai->stream[stream].dma_data;  in snd_soc_dai_dma_data_get()
509 #define snd_soc_dai_set_dma_data(dai, ss, data)		snd_soc_dai_dma_data_set(dai, ss->stream, data)
512 	dai->stream[stream].dma_data = data;  in snd_soc_dai_dma_data_set()
523 	return dai->stream[stream].tdm_mask;  in snd_soc_dai_tdm_mask_get()
529 	dai->stream[stream].tdm_mask = tdm_mask;  in snd_soc_dai_tdm_mask_set()
535 	return dai->stream[stream].active;  in snd_soc_dai_stream_active()
541 	dev_set_drvdata(dai->dev, data);  in snd_soc_dai_set_drvdata()
546 	return dev_get_drvdata(dai->dev);  in snd_soc_dai_get_drvdata()
550  * snd_soc_dai_set_stream() - Configures a DAI for stream operation
564 	if (dai->driver->ops->set_stream)  in snd_soc_dai_set_stream()
565 		return dai->driver->ops->set_stream(dai, stream, direction);  in snd_soc_dai_set_stream()
567 		return -ENOTSUPP;  in snd_soc_dai_set_stream()
571  * snd_soc_dai_get_stream() - Retrieves stream from DAI
579  * ERR_PTR(-ENOTSUPP) if callback is not supported;
584 	if (dai->driver->ops->get_stream)  in snd_soc_dai_get_stream()
585 		return dai->driver->ops->get_stream(dai, direction);  in snd_soc_dai_get_stream()
587 		return ERR_PTR(-ENOTSUPP);  in snd_soc_dai_get_stream()