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 19 int 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 } 55 EXPORT_SYMBOL_NS(acp_pcm_hw_params, SND_SOC_SOF_AMD_COMMON); 56 57 int 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 } 70 EXPORT_SYMBOL_NS(acp_pcm_open, SND_SOC_SOF_AMD_COMMON); 71 72 int 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 } 87 EXPORT_SYMBOL_NS(acp_pcm_close, SND_SOC_SOF_AMD_COMMON); 88 89 snd_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 = asoc_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 } 120 EXPORT_SYMBOL_NS(acp_pcm_pointer, SND_SOC_SOF_AMD_COMMON); 121