ASoC: SOF: Intel: Probe compress operations

Add HDA handlers for soc_compr_ops and snd_compr_ops which cover probe
related operations. Implementation supports both connection purposes.
These merely define stream setups as core flow is covered by SOF
compress core.
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200218143924.10565-8-cezary.rojewski@intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/intel/Kconfig

@@ -305,6 +305,15 @@ config SND_SOC_SOF_HDA_AUDIO_CODEC
 	  Say Y if you want to enable HDAudio codecs with SOF.
 	  If unsure select "N".
 
+config SND_SOC_SOF_HDA_PROBES
+	bool "SOF enable probes over HDA"
+	depends on SND_SOC_SOF_DEBUG_PROBES
+	help
+	  This option enables the data probing for Intel(R).
+		  Intel(R) Skylake and newer platforms.
+	  Say Y if you want to enable probes.
+	  If unsure, select "N".
+
 config SND_SOC_SOF_HDA_ALWAYS_ENABLE_DMI_L1
 	bool "SOF enable DMI Link L1"
 	help

sound/soc/sof/intel/Makefile

@@ -9,6 +9,7 @@ snd-sof-intel-hda-common-objs := hda.o hda-loader.o hda-stream.o hda-trace.o \
 				 hda-dsp.o hda-ipc.o hda-ctrl.o hda-pcm.o \
 				 hda-dai.o hda-bus.o \
 				 apl.o cnl.o
+snd-sof-intel-hda-common-$(CONFIG_SND_SOC_SOF_HDA_PROBES) += hda-compress.o
 
 snd-sof-intel-hda-objs := hda-codec.o
 

sound/soc/sof/intel/apl.c

@@ -73,6 +73,15 @@ const struct snd_sof_dsp_ops sof_apl_ops = {
 	.pcm_trigger	= hda_dsp_pcm_trigger,
 	.pcm_pointer	= hda_dsp_pcm_pointer,
 
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_PROBES)
+	/* probe callbacks */
+	.probe_assign	= hda_probe_compr_assign,
+	.probe_free	= hda_probe_compr_free,
+	.probe_set_params	= hda_probe_compr_set_params,
+	.probe_trigger	= hda_probe_compr_trigger,
+	.probe_pointer	= hda_probe_compr_pointer,
+#endif
+
 	/* firmware loading */
 	.load_firmware = snd_sof_load_firmware_raw,
 

sound/soc/sof/intel/cnl.c

@@ -284,6 +284,15 @@ const struct snd_sof_dsp_ops sof_cnl_ops = {
 	.pcm_trigger	= hda_dsp_pcm_trigger,
 	.pcm_pointer	= hda_dsp_pcm_pointer,
 
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_PROBES)
+	/* probe callbacks */
+	.probe_assign	= hda_probe_compr_assign,
+	.probe_free	= hda_probe_compr_free,
+	.probe_set_params	= hda_probe_compr_set_params,
+	.probe_trigger	= hda_probe_compr_trigger,
+	.probe_pointer	= hda_probe_compr_pointer,
+#endif
+
 	/* firmware loading */
 	.load_firmware = snd_sof_load_firmware_raw,
 

sound/soc/sof/intel/hda-compress.c

+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+//
+// This file is provided under a dual BSD/GPLv2 license.  When using or
+// redistributing this file, you may do so under either license.
+//
+// Copyright(c) 2019-2020 Intel Corporation. All rights reserved.
+//
+// Author: Cezary Rojewski <cezary.rojewski@intel.com>
+//
+
+#include <sound/hdaudio_ext.h>
+#include <sound/soc.h>
+#include "../sof-priv.h"
+#include "hda.h"
+
+static inline struct hdac_ext_stream *
+hda_compr_get_stream(struct snd_compr_stream *cstream)
+{
+	return cstream->runtime->private_data;
+}
+
+int hda_probe_compr_assign(struct snd_sof_dev *sdev,
+			   struct snd_compr_stream *cstream,
+			   struct snd_soc_dai *dai)
+{
+	struct hdac_ext_stream *stream;
+
+	stream = hda_dsp_stream_get(sdev, cstream->direction);
+	if (!stream)
+		return -EBUSY;
+
+	hdac_stream(stream)->curr_pos = 0;
+	hdac_stream(stream)->cstream = cstream;
+	cstream->runtime->private_data = stream;
+
+	return hdac_stream(stream)->stream_tag;
+}
+
+int hda_probe_compr_free(struct snd_sof_dev *sdev,
+			 struct snd_compr_stream *cstream,
+			 struct snd_soc_dai *dai)
+{
+	struct hdac_ext_stream *stream = hda_compr_get_stream(cstream);
+	int ret;
+
+	ret = hda_dsp_stream_put(sdev, cstream->direction,
+				 hdac_stream(stream)->stream_tag);
+	if (ret < 0) {
+		dev_dbg(sdev->dev, "stream put failed: %d\n", ret);
+		return ret;
+	}
+
+	hdac_stream(stream)->cstream = NULL;
+	cstream->runtime->private_data = NULL;
+
+	return 0;
+}
+
+int hda_probe_compr_set_params(struct snd_sof_dev *sdev,
+			       struct snd_compr_stream *cstream,
+			       struct snd_compr_params *params,
+			       struct snd_soc_dai *dai)
+{
+	struct hdac_ext_stream *stream = hda_compr_get_stream(cstream);
+	struct hdac_stream *hstream = hdac_stream(stream);
+	struct snd_dma_buffer *dmab;
+	u32 bits, rate;
+	int bps, ret;
+
+	dmab = cstream->runtime->dma_buffer_p;
+	/* compr params do not store bit depth, default to S32_LE */
+	bps = snd_pcm_format_physical_width(SNDRV_PCM_FORMAT_S32_LE);
+	if (bps < 0)
+		return bps;
+	bits = hda_dsp_get_bits(sdev, bps);
+	rate = hda_dsp_get_mult_div(sdev, params->codec.sample_rate);
+
+	hstream->format_val = rate | bits | (params->codec.ch_out - 1);
+	hstream->bufsize = cstream->runtime->buffer_size;
+	hstream->period_bytes = cstream->runtime->fragment_size;
+	hstream->no_period_wakeup = 0;
+
+	ret = hda_dsp_stream_hw_params(sdev, stream, dmab, NULL);
+	if (ret < 0) {
+		dev_err(sdev->dev, "error: hdac prepare failed: %x\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+int hda_probe_compr_trigger(struct snd_sof_dev *sdev,
+			    struct snd_compr_stream *cstream, int cmd,
+			    struct snd_soc_dai *dai)
+{
+	struct hdac_ext_stream *stream = hda_compr_get_stream(cstream);
+
+	return hda_dsp_stream_trigger(sdev, stream, cmd);
+}
+
+int hda_probe_compr_pointer(struct snd_sof_dev *sdev,
+			    struct snd_compr_stream *cstream,
+			    struct snd_compr_tstamp *tstamp,
+			    struct snd_soc_dai *dai)
+{
+	struct hdac_ext_stream *stream = hda_compr_get_stream(cstream);
+	struct snd_soc_pcm_stream *pstream;
+
+	pstream = &dai->driver->capture;
+	tstamp->copied_total = hdac_stream(stream)->curr_pos;
+	tstamp->sampling_rate = snd_pcm_rate_bit_to_rate(pstream->rates);
+
+	return 0;
+}

sound/soc/sof/intel/hda.h

@@ -11,6 +11,7 @@
 #ifndef __SOF_INTEL_HDA_H
 #define __SOF_INTEL_HDA_H
 
+#include <sound/compress_driver.h>
 #include <sound/hda_codec.h>
 #include <sound/hdaudio_ext.h>
 #include "shim.h"
@@ -552,6 +553,29 @@ int hda_ipc_pcm_params(struct snd_sof_dev *sdev,
 		       struct snd_pcm_substream *substream,
 		       const struct sof_ipc_pcm_params_reply *reply);
 
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_PROBES)
+/*
+ * Probe Compress Operations.
+ */
+int hda_probe_compr_assign(struct snd_sof_dev *sdev,
+			   struct snd_compr_stream *cstream,
+			   struct snd_soc_dai *dai);
+int hda_probe_compr_free(struct snd_sof_dev *sdev,
+			 struct snd_compr_stream *cstream,
+			 struct snd_soc_dai *dai);
+int hda_probe_compr_set_params(struct snd_sof_dev *sdev,
+			       struct snd_compr_stream *cstream,
+			       struct snd_compr_params *params,
+			       struct snd_soc_dai *dai);
+int hda_probe_compr_trigger(struct snd_sof_dev *sdev,
+			    struct snd_compr_stream *cstream, int cmd,
+			    struct snd_soc_dai *dai);
+int hda_probe_compr_pointer(struct snd_sof_dev *sdev,
+			    struct snd_compr_stream *cstream,
+			    struct snd_compr_tstamp *tstamp,
+			    struct snd_soc_dai *dai);
+#endif
+
 /*
  * DSP IPC Operations.
  */