LXR linux/sound/soc/sof/intel/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. All rights reserved.
   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)
  23{
  24        struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
  25        struct hdac_ext_stream *stream = hda->dtrace_stream;
  26        struct hdac_stream *hstream = &stream->hstream;
  27        struct snd_dma_buffer *dmab = &sdev->dmatb;
  28        int ret;
  29
  30        hstream->period_bytes = 0;/* initialize period_bytes */
  31        hstream->bufsize = sdev->dmatb.bytes;
  32
  33        ret = hda_dsp_stream_hw_params(sdev, stream, dmab, NULL);
  34        if (ret < 0)
  35                dev_err(sdev->dev, "error: hdac prepare failed: %x\n", ret);
  36
  37        return ret;
  38}
  39
  40int hda_dsp_trace_init(struct snd_sof_dev *sdev, u32 *stream_tag)
  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,
  46                                                SNDRV_PCM_STREAM_CAPTURE);
  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        *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);
  61        if (ret < 0) {
  62                dev_err(sdev->dev, "error: hdac trace init failed: %x\n", ret);
  63                hda_dsp_stream_put(sdev, SNDRV_PCM_STREAM_CAPTURE, *stream_tag);
  64                hda->dtrace_stream = NULL;
  65                *stream_tag = 0;
  66        }
  67
  68        return ret;
  69}
  70
  71int hda_dsp_trace_release(struct snd_sof_dev *sdev)
  72{
  73        struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
  74        struct hdac_stream *hstream;
  75
  76        if (hda->dtrace_stream) {
  77                hstream = &hda->dtrace_stream->hstream;
  78                hda_dsp_stream_put(sdev,
  79                                   SNDRV_PCM_STREAM_CAPTURE,
  80                                   hstream->stream_tag);
  81                hda->dtrace_stream = NULL;
  82                return 0;
  83        }
  84
  85        dev_dbg(sdev->dev, "DMA trace stream is not opened!\n");
  86        return -ENODEV;
  87}
  88
  89int hda_dsp_trace_trigger(struct snd_sof_dev *sdev, int cmd)
  90{
  91        struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
  92
  93        return hda_dsp_stream_trigger(sdev, hda->dtrace_stream, cmd);
  94}
  95