1 files changed, 128 insertions, 0 deletions
diff --git a/include/sound/soc-dsp.h b/include/sound/soc-dsp.h
new file mode 100644
index 0000000..033d61a
--- /dev/null
+++ b/include/sound/soc-dsp.h
@@ -0,0 +1,128 @@
+/*
+ * linux/sound/soc-dsp.h -- ALSA SoC DSP
+ *
+ * Author:		Liam Girdwood <lrg@slimlogic.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __LINUX_SND_SOC_DSP_H
+#define __LINUX_SND_SOC_DSP_H
+
+#include <sound/pcm.h>
+
+struct snd_soc_dapm_widget;
+
+/*
+ * Types of runtime_update to perform (e.g. originated from FE PCM ops
+ * or audio route changes triggered by muxes/mixers.
+ */
+#define SND_SOC_DSP_UPDATE_NO	0
+#define SND_SOC_DSP_UPDATE_BE	1
+#define SND_SOC_DSP_UPDATE_FE	2
+
+/*
+ * DSP trigger ordering. Triggering flexibility is required as some DSPs
+ * require triggering before/after their clients/hosts.
+ *
+ * i.e. some clients may want to manually order this call in their PCM
+ * trigger() whilst others will just use the regular core ordering.
+ */
+enum snd_soc_dsp_trigger {
+	SND_SOC_DSP_TRIGGER_PRE		= 0,
+	SND_SOC_DSP_TRIGGER_POST,
+	SND_SOC_DSP_TRIGGER_BESPOKE,
+};
+
+/*
+ * The DSP Frontend -> Backend link state.
+ */
+enum snd_soc_dsp_link_state {
+	SND_SOC_DSP_LINK_STATE_NEW	= 0,	/* newly created path */
+	SND_SOC_DSP_LINK_STATE_FREE,			/* path to be dismantled */
+};
+
+struct snd_soc_dsp_params {
+	struct snd_soc_pcm_runtime *be;
+	struct snd_soc_pcm_runtime *fe;
+	enum snd_soc_dsp_link_state state;
+	struct list_head list_be;
+	struct list_head list_fe;
+	struct snd_pcm_hw_params hw_params;
+#ifdef CONFIG_DEBUG_FS
+	struct dentry *debugfs_state;
+#endif
+};
+
+struct snd_soc_dsp_link {
+	bool capture;
+	bool playback;
+	enum snd_soc_dsp_trigger trigger[2];
+};
+
+/* FE DSP PCM ops - called by soc-core */
+int soc_dsp_fe_dai_open(struct snd_pcm_substream *substream);
+int soc_dsp_fe_dai_close(struct snd_pcm_substream *substream);
+int soc_dsp_fe_dai_prepare(struct snd_pcm_substream *substream);
+int soc_dsp_fe_dai_hw_free(struct snd_pcm_substream *substream);
+int soc_dsp_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd);
+int soc_dsp_fe_dai_hw_params(struct snd_pcm_substream *substream,
+				    struct snd_pcm_hw_params *params);
+
+/* Backend DSP trigger.
+ * Can be called by core or components depending on trigger config.
+ */
+int soc_dsp_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, int cmd);
+
+/* Is this trigger() call required for this FE and stream */
+static inline int snd_soc_dsp_is_trigger_for_fe(struct snd_soc_pcm_runtime *fe,
+		int stream)
+{
+	return (fe->dsp[stream].runtime_update == SND_SOC_DSP_UPDATE_FE);
+}
+
+static inline int snd_soc_dsp_is_op_for_be(struct snd_soc_pcm_runtime *fe,
+		struct snd_soc_pcm_runtime *be, int stream)
+{
+	if ((fe->dsp[stream].runtime_update == SND_SOC_DSP_UPDATE_FE) ||
+	    ((fe->dsp[stream].runtime_update == SND_SOC_DSP_UPDATE_BE) &&
+		  be->dsp[stream].runtime_update))
+		return 1;
+	else
+		return 0;
+}
+
+static inline int snd_soc_dsp_platform_trigger(struct snd_pcm_substream *substream,
+	int cmd, struct snd_soc_platform *platform)
+{
+	if (platform->driver->ops->trigger)
+		return platform->driver->ops->trigger(substream, cmd);
+	return 0;
+}
+
+int soc_dsp_fe_state_count(struct snd_soc_pcm_runtime *be, int stream,
+			enum snd_soc_dsp_state state);
+
+/* Runtime update - open/close Backend DSP paths depending on mixer updates */
+int soc_dsp_runtime_update(struct snd_soc_dapm_widget *widget);
+
+/* Backend DSP suspend and resume */
+int soc_dsp_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute);
+int soc_dsp_fe_suspend(struct snd_soc_pcm_runtime *fe);
+int soc_dsp_be_ac97_cpu_dai_suspend(struct snd_soc_pcm_runtime *fe);
+int soc_dsp_fe_resume(struct snd_soc_pcm_runtime *fe);
+int soc_dsp_be_ac97_cpu_dai_resume(struct snd_soc_pcm_runtime *fe);
+
+/* DAPM stream events for Backend DSP paths */
+int soc_dsp_dapm_stream_event(struct snd_soc_pcm_runtime *fe,
+	int dir, const char *stream, int event);
+
+static inline struct snd_pcm_substream *snd_soc_dsp_get_substream(
+		struct snd_soc_pcm_runtime *be, int stream)
+{
+	return be->pcm->streams[stream].substream;
+}
+
+#endif