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
  22 static 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
  39 int 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 }
  71
  72 int hda_dsp_trace_release(struct snd_sof_dev *sdev)
  73 {
  74         struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
  75         struct hdac_stream *hstream;
  76
  77         if (hda->dtrace_stream) {
  78                 hstream = &hda->dtrace_stream->hstream;
  79                 hda_dsp_stream_put(sdev,
  80                                    SNDRV_PCM_STREAM_CAPTURE,
  81                                    hstream->stream_tag);
  82                 hda->dtrace_stream = NULL;
  83                 return 0;
  84         }
  85
  86         dev_dbg(sdev->dev, "DMA trace stream is not opened!\n");
  87         return -ENODEV;
  88 }
  89
  90 int hda_dsp_trace_trigger(struct snd_sof_dev *sdev, int cmd)
  91 {
  92         struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
  93
  94         return hda_dsp_stream_trigger(sdev, hda->dtrace_stream, cmd);
  95 }