ASoC: SOF: Intel: Add Intel specific HDA trace operations

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>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/sof/intel/hda-trace.c b/sound/soc/sof/intel/hda-trace.c
new file mode 100644 (file)
index 0000000..33b23bd
--- /dev/null
+++ b/sound/soc/sof/intel/hda-trace.c
@@ -0,0 +1,94 @@
+// 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 = 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 = 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 = 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 = sdev->pdata->hw_pdata;
+
+       return hda_dsp_stream_trigger(sdev, hda->dtrace_stream, cmd);
+}