sof/amd/acp-pcm.c

0001 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
0002 //
0003 // This file is provided under a dual BSD/GPLv2 license. When using or
0004 // redistributing this file, you may do so under either license.
0005 //
0006 // Copyright(c) 2021 Advanced Micro Devices, Inc.
0007 //
0008 // Authors: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
0009
0010 /*
0011  * PCM interface for generic AMD audio ACP DSP block
0012  */
0013 #include <sound/pcm_params.h>
0014
0015 #include "../ops.h"
0016 #include "acp.h"
0017 #include "acp-dsp-offset.h"
0018
0019 int acp_pcm_hw_params(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream,
0020               struct snd_pcm_hw_params *params,
0021               struct snd_sof_platform_stream_params *platform_params)
0022 {
0023     struct snd_pcm_runtime *runtime = substream->runtime;
0024     struct acp_dsp_stream *stream = runtime->private_data;
0025     unsigned int buf_offset, index;
0026     u32 size;
0027     int ret;
0028
0029     size = runtime->dma_bytes;
0030     stream->num_pages = PFN_UP(runtime->dma_bytes);
0031     stream->dmab = substream->runtime->dma_buffer_p;
0032
0033     ret = acp_dsp_stream_config(sdev, stream);
0034     if (ret < 0) {
0035         dev_err(sdev->dev, "stream configuration failed\n");
0036         return ret;
0037     }
0038
0039     platform_params->use_phy_address = true;
0040     platform_params->phy_addr = stream->reg_offset;
0041     platform_params->stream_tag = stream->stream_tag;
0042
0043     /* write buffer size of stream in scratch memory */
0044
0045     buf_offset = offsetof(struct scratch_reg_conf, buf_size);
0046     index = stream->stream_tag - 1;
0047     buf_offset = buf_offset + index * 4;
0048
0049     snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP_SCRATCH_REG_0 + buf_offset, size);
0050
0051     return 0;
0052 }
0053 EXPORT_SYMBOL_NS(acp_pcm_hw_params, SND_SOC_SOF_AMD_COMMON);
0054
0055 int acp_pcm_open(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream)
0056 {
0057     struct acp_dsp_stream *stream;
0058
0059     stream = acp_dsp_stream_get(sdev, 0);
0060     if (!stream)
0061         return -ENODEV;
0062
0063     substream->runtime->private_data = stream;
0064     stream->substream = substream;
0065
0066     return 0;
0067 }
0068 EXPORT_SYMBOL_NS(acp_pcm_open, SND_SOC_SOF_AMD_COMMON);
0069
0070 int acp_pcm_close(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream)
0071 {
0072     struct acp_dsp_stream *stream;
0073
0074     stream = substream->runtime->private_data;
0075     if (!stream) {
0076         dev_err(sdev->dev, "No open stream\n");
0077         return -EINVAL;
0078     }
0079
0080     stream->substream = NULL;
0081     substream->runtime->private_data = NULL;
0082
0083     return acp_dsp_stream_put(sdev, stream);
0084 }
0085 EXPORT_SYMBOL_NS(acp_pcm_close, SND_SOC_SOF_AMD_COMMON);