hda-trace.c

 1// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
 2//
 3// This file is provided under a dual BSD/GPLv2 license.  When using or
 4// redistributing this file, you may do so under either license.
 5//
 6// Copyright(c) 2018 Intel Corporation
 7//
 8// Authors: Liam Girdwood <liam.r.girdwood@linux.intel.com>
 9//	    Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
10//	    Rander Wang <rander.wang@intel.com>
11//          Keyon Jie <yang.jie@linux.intel.com>
12//
13
14/*
15 * Hardware interface for generic Intel audio DSP HDA IP
16 */
17
18#include <sound/hdaudio_ext.h>
19#include "../ops.h"
20#include "hda.h"
21
22static int hda_dsp_trace_prepare(struct snd_sof_dev *sdev, struct snd_dma_buffer *dmab)
23{
24	struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
25	struct hdac_ext_stream *hext_stream = hda->dtrace_stream;
26	struct hdac_stream *hstream = &hext_stream->hstream;
27	int ret;
28
29	hstream->period_bytes = 0;/* initialize period_bytes */
30	hstream->bufsize = dmab->bytes;
31
32	ret = hda_dsp_stream_hw_params(sdev, hext_stream, dmab, NULL);
33	if (ret < 0)
34		dev_err(sdev->dev, "error: hdac prepare failed: %d\n", ret);
35
36	return ret;
37}
38
39int hda_dsp_trace_init(struct snd_sof_dev *sdev, struct snd_dma_buffer *dmab,
40		       struct sof_ipc_dma_trace_params_ext *dtrace_params)
41{
42	struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
43	int ret;
44
45	hda->dtrace_stream = hda_dsp_stream_get(sdev, SNDRV_PCM_STREAM_CAPTURE,
46						SOF_HDA_STREAM_DMI_L1_COMPATIBLE);
47
48	if (!hda->dtrace_stream) {
49		dev_err(sdev->dev,
50			"error: no available capture stream for DMA trace\n");
51		return -ENODEV;
52	}
53
54	dtrace_params->stream_tag = hda->dtrace_stream->hstream.stream_tag;
55
56	/*
57	 * initialize capture stream, set BDL address and return corresponding
58	 * stream tag which will be sent to the firmware by IPC message.
59	 */
60	ret = hda_dsp_trace_prepare(sdev, dmab);
61	if (ret < 0) {
62		dev_err(sdev->dev, "error: hdac trace init failed: %d\n", ret);
63		hda_dsp_stream_put(sdev, SNDRV_PCM_STREAM_CAPTURE,
64				   dtrace_params->stream_tag);
65		hda->dtrace_stream = NULL;
66		dtrace_params->stream_tag = 0;
67	}
68
69	return ret;
70}
71EXPORT_SYMBOL_NS(hda_dsp_trace_init, "SND_SOC_SOF_INTEL_HDA_COMMON");
72
73int hda_dsp_trace_release(struct snd_sof_dev *sdev)
74{
75	struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
76	struct hdac_stream *hstream;
77
78	if (hda->dtrace_stream) {
79		hstream = &hda->dtrace_stream->hstream;
80		hda_dsp_stream_put(sdev,
81				   SNDRV_PCM_STREAM_CAPTURE,
82				   hstream->stream_tag);
83		hda->dtrace_stream = NULL;
84		return 0;
85	}
86
87	dev_dbg(sdev->dev, "DMA trace stream is not opened!\n");
88	return -ENODEV;
89}
90EXPORT_SYMBOL_NS(hda_dsp_trace_release, "SND_SOC_SOF_INTEL_HDA_COMMON");
91
92int hda_dsp_trace_trigger(struct snd_sof_dev *sdev, int cmd)
93{
94	struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
95
96	return hda_dsp_stream_trigger(sdev, hda->dtrace_stream, cmd);
97}
98EXPORT_SYMBOL_NS(hda_dsp_trace_trigger, "SND_SOC_SOF_INTEL_HDA_COMMON");