From: Liam Girdwood liam.r.girdwood@linux.intel.com
Add trace operations for Intel based HDA DSPs
Signed-off-by: Keyon Jie yang.jie@linux.intel.com Signed-off-by: Liam Girdwood liam.r.girdwood@linux.intel.com Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com --- sound/soc/sof/intel/hda-trace.c | 98 +++++++++++++++++++++++++++++++++ 1 file changed, 98 insertions(+) create mode 100644 sound/soc/sof/intel/hda-trace.c
diff --git a/sound/soc/sof/intel/hda-trace.c b/sound/soc/sof/intel/hda-trace.c new file mode 100644 index 000000000000..6fd77d511118 --- /dev/null +++ b/sound/soc/sof/intel/hda-trace.c @@ -0,0 +1,98 @@ +// 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) 2018 Intel Corporation. All rights reserved. +// +// Authors: Liam Girdwood liam.r.girdwood@linux.intel.com +// Ranjani Sridharan ranjani.sridharan@linux.intel.com +// Rander Wang rander.wang@intel.com +// Keyon Jie yang.jie@linux.intel.com +// + +/* + * Hardware interface for generic Intel audio DSP HDA IP + */ + +#include <sound/hdaudio_ext.h> +#include "../ops.h" +#include "hda.h" + +static int hda_dsp_trace_prepare(struct snd_sof_dev *sdev) +{ + struct sof_intel_hda_dev *hda = + (struct sof_intel_hda_dev *)sdev->pdata->hw_pdata; + struct hdac_ext_stream *stream = hda->dtrace_stream; + struct hdac_stream *hstream = &stream->hstream; + struct snd_dma_buffer *dmab = &sdev->dmatb; + int ret; + + hstream->period_bytes = 0;/* initialize period_bytes */ + hstream->bufsize = sdev->dmatb.bytes; + + 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; +} + +int hda_dsp_trace_init(struct snd_sof_dev *sdev, u32 *stream_tag) +{ + struct sof_intel_hda_dev *hda = + (struct sof_intel_hda_dev *)sdev->pdata->hw_pdata; + int ret; + + hda->dtrace_stream = hda_dsp_stream_get(sdev, + SNDRV_PCM_STREAM_CAPTURE); + + if (!hda->dtrace_stream) { + dev_err(sdev->dev, + "error: no available capture stream for DMA trace\n"); + return -ENODEV; + } + + *stream_tag = hda->dtrace_stream->hstream.stream_tag; + + /* + * initialize capture stream, set BDL address and return corresponding + * stream tag which will be sent to the firmware by IPC message. + */ + ret = hda_dsp_trace_prepare(sdev); + if (ret < 0) { + dev_err(sdev->dev, "error: hdac trace init failed: %x\n", ret); + hda_dsp_stream_put(sdev, SNDRV_PCM_STREAM_CAPTURE, *stream_tag); + hda->dtrace_stream = NULL; + *stream_tag = 0; + } + + return ret; +} + +int hda_dsp_trace_release(struct snd_sof_dev *sdev) +{ + struct sof_intel_hda_dev *hda = + (struct sof_intel_hda_dev *)sdev->pdata->hw_pdata; + struct hdac_stream *hstream; + + if (hda->dtrace_stream) { + hstream = &hda->dtrace_stream->hstream; + hda_dsp_stream_put(sdev, + SNDRV_PCM_STREAM_CAPTURE, + hstream->stream_tag); + hda->dtrace_stream = NULL; + return 0; + } + + dev_dbg(sdev->dev, "DMA trace stream is not opened!\n"); + return -ENODEV; +} + +int hda_dsp_trace_trigger(struct snd_sof_dev *sdev, int cmd) +{ + struct sof_intel_hda_dev *hda = + (struct sof_intel_hda_dev *)sdev->pdata->hw_pdata; + + return hda_dsp_stream_trigger(sdev, hda->dtrace_stream, cmd); +}