acp-pcm.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) 2021 Advanced Micro Devices, Inc.
  7//
  8// Authors: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
  9
 10/*
 11 * PCM interface for generic AMD audio ACP DSP block
 12 */
 13#include <sound/pcm_params.h>
 14
 15#include "../ops.h"
 16#include "acp.h"
 17#include "acp-dsp-offset.h"
 18
 19int acp_pcm_hw_params(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream,
 20		      struct snd_pcm_hw_params *params,
 21		      struct snd_sof_platform_stream_params *platform_params)
 22{
 23	struct snd_pcm_runtime *runtime = substream->runtime;
 24	struct acp_dsp_stream *stream = runtime->private_data;
 25	unsigned int buf_offset, index;
 26	u32 size;
 27	int ret;
 28
 29	size = runtime->dma_bytes;
 30	stream->num_pages = PFN_UP(runtime->dma_bytes);
 31	stream->dmab = substream->runtime->dma_buffer_p;
 32
 33	ret = acp_dsp_stream_config(sdev, stream);
 34	if (ret < 0) {
 35		dev_err(sdev->dev, "stream configuration failed\n");
 36		return ret;
 37	}
 38
 39	platform_params->use_phy_address = true;
 40	platform_params->phy_addr = stream->reg_offset;
 41	platform_params->stream_tag = stream->stream_tag;
 42	platform_params->cont_update_posn = 1;
 43
 44	/* write buffer size of stream in scratch memory */
 45
 46	buf_offset = sdev->debug_box.offset +
 47		     offsetof(struct scratch_reg_conf, buf_size);
 48	index = stream->stream_tag - 1;
 49	buf_offset = buf_offset + index * 4;
 50
 51	snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP_SCRATCH_REG_0 + buf_offset, size);
 52
 53	return 0;
 54}
 55EXPORT_SYMBOL_NS(acp_pcm_hw_params, "SND_SOC_SOF_AMD_COMMON");
 56
 57int acp_pcm_open(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream)
 58{
 59	struct acp_dsp_stream *stream;
 60
 61	stream = acp_dsp_stream_get(sdev, 0);
 62	if (!stream)
 63		return -ENODEV;
 64
 65	substream->runtime->private_data = stream;
 66	stream->substream = substream;
 67
 68	return 0;
 69}
 70EXPORT_SYMBOL_NS(acp_pcm_open, "SND_SOC_SOF_AMD_COMMON");
 71
 72int acp_pcm_close(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream)
 73{
 74	struct acp_dsp_stream *stream;
 75
 76	stream = substream->runtime->private_data;
 77	if (!stream) {
 78		dev_err(sdev->dev, "No open stream\n");
 79		return -EINVAL;
 80	}
 81
 82	stream->substream = NULL;
 83	substream->runtime->private_data = NULL;
 84
 85	return acp_dsp_stream_put(sdev, stream);
 86}
 87EXPORT_SYMBOL_NS(acp_pcm_close, "SND_SOC_SOF_AMD_COMMON");
 88
 89snd_pcm_uframes_t acp_pcm_pointer(struct snd_sof_dev *sdev,
 90				  struct snd_pcm_substream *substream)
 91{
 92	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 93	struct snd_soc_component *scomp = sdev->component;
 94	struct snd_sof_pcm_stream *stream;
 95	struct sof_ipc_stream_posn posn;
 96	struct snd_sof_pcm *spcm;
 97	snd_pcm_uframes_t pos;
 98	int ret;
 99
100	spcm = snd_sof_find_spcm_dai(scomp, rtd);
101	if (!spcm) {
102		dev_warn_ratelimited(sdev->dev, "warn: can't find PCM with DAI ID %d\n",
103				     rtd->dai_link->id);
104		return 0;
105	}
106
107	stream = &spcm->stream[substream->stream];
108	ret = snd_sof_ipc_msg_data(sdev, stream, &posn, sizeof(posn));
109	if (ret < 0) {
110		dev_warn(sdev->dev, "failed to read stream position: %d\n", ret);
111		return 0;
112	}
113
114	memcpy(&stream->posn, &posn, sizeof(posn));
115	pos = spcm->stream[substream->stream].posn.host_posn;
116	pos = bytes_to_frames(substream->runtime, pos);
117
118	return pos;
119}
120EXPORT_SYMBOL_NS(acp_pcm_pointer, "SND_SOC_SOF_AMD_COMMON");