acp-pcm.c (2315B)
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 43 /* write buffer size of stream in scratch memory */ 44 45 buf_offset = offsetof(struct scratch_reg_conf, buf_size); 46 index = stream->stream_tag - 1; 47 buf_offset = buf_offset + index * 4; 48 49 snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP_SCRATCH_REG_0 + buf_offset, size); 50 51 return 0; 52} 53EXPORT_SYMBOL_NS(acp_pcm_hw_params, SND_SOC_SOF_AMD_COMMON); 54 55int acp_pcm_open(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream) 56{ 57 struct acp_dsp_stream *stream; 58 59 stream = acp_dsp_stream_get(sdev, 0); 60 if (!stream) 61 return -ENODEV; 62 63 substream->runtime->private_data = stream; 64 stream->substream = substream; 65 66 return 0; 67} 68EXPORT_SYMBOL_NS(acp_pcm_open, SND_SOC_SOF_AMD_COMMON); 69 70int acp_pcm_close(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream) 71{ 72 struct acp_dsp_stream *stream; 73 74 stream = substream->runtime->private_data; 75 if (!stream) { 76 dev_err(sdev->dev, "No open stream\n"); 77 return -EINVAL; 78 } 79 80 stream->substream = NULL; 81 substream->runtime->private_data = NULL; 82 83 return acp_dsp_stream_put(sdev, stream); 84} 85EXPORT_SYMBOL_NS(acp_pcm_close, SND_SOC_SOF_AMD_COMMON);