sof/intel/hda-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) 2018 Intel Corporation. All rights reserved.
0007 //
0008 // Authors: Liam Girdwood <liam.r.girdwood@linux.intel.com>
0009 //      Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
0010 //      Rander Wang <rander.wang@intel.com>
0011 //          Keyon Jie <yang.jie@linux.intel.com>
0012 //
0013
0014 /*
0015  * Hardware interface for generic Intel audio DSP HDA IP
0016  */
0017
0018 #include <linux/moduleparam.h>
0019 #include <sound/hda_register.h>
0020 #include <sound/pcm_params.h>
0021 #include "../sof-audio.h"
0022 #include "../ops.h"
0023 #include "hda.h"
0024
0025 #define SDnFMT_BASE(x)  ((x) << 14)
0026 #define SDnFMT_MULT(x)  (((x) - 1) << 11)
0027 #define SDnFMT_DIV(x)   (((x) - 1) << 8)
0028 #define SDnFMT_BITS(x)  ((x) << 4)
0029 #define SDnFMT_CHAN(x)  ((x) << 0)
0030
0031 static bool hda_always_enable_dmi_l1;
0032 module_param_named(always_enable_dmi_l1, hda_always_enable_dmi_l1, bool, 0444);
0033 MODULE_PARM_DESC(always_enable_dmi_l1, "SOF HDA always enable DMI l1");
0034
0035 static bool hda_disable_rewinds = IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_DISABLE_REWINDS);
0036 module_param_named(disable_rewinds, hda_disable_rewinds, bool, 0444);
0037 MODULE_PARM_DESC(disable_rewinds, "SOF HDA disable rewinds");
0038
0039 u32 hda_dsp_get_mult_div(struct snd_sof_dev *sdev, int rate)
0040 {
0041     switch (rate) {
0042     case 8000:
0043         return SDnFMT_DIV(6);
0044     case 9600:
0045         return SDnFMT_DIV(5);
0046     case 11025:
0047         return SDnFMT_BASE(1) | SDnFMT_DIV(4);
0048     case 16000:
0049         return SDnFMT_DIV(3);
0050     case 22050:
0051         return SDnFMT_BASE(1) | SDnFMT_DIV(2);
0052     case 32000:
0053         return SDnFMT_DIV(3) | SDnFMT_MULT(2);
0054     case 44100:
0055         return SDnFMT_BASE(1);
0056     case 48000:
0057         return 0;
0058     case 88200:
0059         return SDnFMT_BASE(1) | SDnFMT_MULT(2);
0060     case 96000:
0061         return SDnFMT_MULT(2);
0062     case 176400:
0063         return SDnFMT_BASE(1) | SDnFMT_MULT(4);
0064     case 192000:
0065         return SDnFMT_MULT(4);
0066     default:
0067         dev_warn(sdev->dev, "can't find div rate %d using 48kHz\n",
0068              rate);
0069         return 0; /* use 48KHz if not found */
0070     }
0071 };
0072
0073 u32 hda_dsp_get_bits(struct snd_sof_dev *sdev, int sample_bits)
0074 {
0075     switch (sample_bits) {
0076     case 8:
0077         return SDnFMT_BITS(0);
0078     case 16:
0079         return SDnFMT_BITS(1);
0080     case 20:
0081         return SDnFMT_BITS(2);
0082     case 24:
0083         return SDnFMT_BITS(3);
0084     case 32:
0085         return SDnFMT_BITS(4);
0086     default:
0087         dev_warn(sdev->dev, "can't find %d bits using 16bit\n",
0088              sample_bits);
0089         return SDnFMT_BITS(1); /* use 16bits format if not found */
0090     }
0091 };
0092
0093 int hda_dsp_pcm_hw_params(struct snd_sof_dev *sdev,
0094               struct snd_pcm_substream *substream,
0095               struct snd_pcm_hw_params *params,
0096               struct snd_sof_platform_stream_params *platform_params)
0097 {
0098     struct hdac_stream *hstream = substream->runtime->private_data;
0099     struct hdac_ext_stream *hext_stream = stream_to_hdac_ext_stream(hstream);
0100     struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
0101     struct snd_dma_buffer *dmab;
0102     int ret;
0103     u32 size, rate, bits;
0104
0105     size = params_buffer_bytes(params);
0106     rate = hda_dsp_get_mult_div(sdev, params_rate(params));
0107     bits = hda_dsp_get_bits(sdev, params_width(params));
0108
0109     hstream->substream = substream;
0110
0111     dmab = substream->runtime->dma_buffer_p;
0112
0113     hstream->format_val = rate | bits | (params_channels(params) - 1);
0114     hstream->bufsize = size;
0115     hstream->period_bytes = params_period_bytes(params);
0116     hstream->no_period_wakeup  =
0117             (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
0118             (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
0119
0120     ret = hda_dsp_stream_hw_params(sdev, hext_stream, dmab, params);
0121     if (ret < 0) {
0122         dev_err(sdev->dev, "error: hdac prepare failed: %d\n", ret);
0123         return ret;
0124     }
0125
0126     /* enable SPIB when rewinds are disabled */
0127     if (hda_disable_rewinds)
0128         hda_dsp_stream_spib_config(sdev, hext_stream, HDA_DSP_SPIB_ENABLE, 0);
0129     else
0130         hda_dsp_stream_spib_config(sdev, hext_stream, HDA_DSP_SPIB_DISABLE, 0);
0131
0132     if (hda)
0133         platform_params->no_ipc_position = hda->no_ipc_position;
0134
0135     platform_params->stream_tag = hstream->stream_tag;
0136
0137     return 0;
0138 }
0139
0140 /* update SPIB register with appl position */
0141 int hda_dsp_pcm_ack(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream)
0142 {
0143     struct hdac_stream *hstream = substream->runtime->private_data;
0144     struct hdac_ext_stream *hext_stream = stream_to_hdac_ext_stream(hstream);
0145     struct snd_pcm_runtime *runtime = substream->runtime;
0146     ssize_t appl_pos, buf_size;
0147     u32 spib;
0148
0149     appl_pos = frames_to_bytes(runtime, runtime->control->appl_ptr);
0150     buf_size = frames_to_bytes(runtime, runtime->buffer_size);
0151
0152     spib = appl_pos % buf_size;
0153
0154     /* Allowable value for SPIB is 1 byte to max buffer size */
0155     if (!spib)
0156         spib = buf_size;
0157
0158     sof_io_write(sdev, hext_stream->spib_addr, spib);
0159
0160     return 0;
0161 }
0162
0163 int hda_dsp_pcm_trigger(struct snd_sof_dev *sdev,
0164             struct snd_pcm_substream *substream, int cmd)
0165 {
0166     struct hdac_stream *hstream = substream->runtime->private_data;
0167     struct hdac_ext_stream *hext_stream = stream_to_hdac_ext_stream(hstream);
0168
0169     return hda_dsp_stream_trigger(sdev, hext_stream, cmd);
0170 }
0171
0172 snd_pcm_uframes_t hda_dsp_pcm_pointer(struct snd_sof_dev *sdev,
0173                       struct snd_pcm_substream *substream)
0174 {
0175     struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
0176     struct snd_soc_component *scomp = sdev->component;
0177     struct hdac_stream *hstream = substream->runtime->private_data;
0178     struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
0179     struct snd_sof_pcm *spcm;
0180     snd_pcm_uframes_t pos;
0181
0182     spcm = snd_sof_find_spcm_dai(scomp, rtd);
0183     if (!spcm) {
0184         dev_warn_ratelimited(sdev->dev, "warn: can't find PCM with DAI ID %d\n",
0185                      rtd->dai_link->id);
0186         return 0;
0187     }
0188
0189     if (hda && !hda->no_ipc_position) {
0190         /* read position from IPC position */
0191         pos = spcm->stream[substream->stream].posn.host_posn;
0192         goto found;
0193     }
0194
0195     pos = hda_dsp_stream_get_position(hstream, substream->stream, true);
0196 found:
0197     pos = bytes_to_frames(substream->runtime, pos);
0198
0199     dev_vdbg(sdev->dev, "PCM: stream %d dir %d position %lu\n",
0200          hstream->index, substream->stream, pos);
0201     return pos;
0202 }
0203
0204 int hda_dsp_pcm_open(struct snd_sof_dev *sdev,
0205              struct snd_pcm_substream *substream)
0206 {
0207     struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
0208     struct snd_pcm_runtime *runtime = substream->runtime;
0209     struct snd_soc_component *scomp = sdev->component;
0210     struct hdac_ext_stream *dsp_stream;
0211     struct snd_sof_pcm *spcm;
0212     int direction = substream->stream;
0213     u32 flags = 0;
0214
0215     spcm = snd_sof_find_spcm_dai(scomp, rtd);
0216     if (!spcm) {
0217         dev_err(sdev->dev, "error: can't find PCM with DAI ID %d\n", rtd->dai_link->id);
0218         return -EINVAL;
0219     }
0220
0221     /*
0222      * if we want the .ack to work, we need to prevent the control from being mapped.
0223      * The status can still be mapped.
0224      */
0225     if (hda_disable_rewinds)
0226         runtime->hw.info |= SNDRV_PCM_INFO_NO_REWINDS | SNDRV_PCM_INFO_SYNC_APPLPTR;
0227
0228     /*
0229      * All playback streams are DMI L1 capable, capture streams need
0230      * pause push/release to be disabled
0231      */
0232     if (hda_always_enable_dmi_l1 && direction == SNDRV_PCM_STREAM_CAPTURE)
0233         runtime->hw.info &= ~SNDRV_PCM_INFO_PAUSE;
0234
0235     if (hda_always_enable_dmi_l1 ||
0236         direction == SNDRV_PCM_STREAM_PLAYBACK ||
0237         spcm->stream[substream->stream].d0i3_compatible)
0238         flags |= SOF_HDA_STREAM_DMI_L1_COMPATIBLE;
0239
0240     dsp_stream = hda_dsp_stream_get(sdev, direction, flags);
0241     if (!dsp_stream) {
0242         dev_err(sdev->dev, "error: no stream available\n");
0243         return -ENODEV;
0244     }
0245
0246     /* minimum as per HDA spec */
0247     snd_pcm_hw_constraint_step(substream->runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 4);
0248
0249     /* avoid circular buffer wrap in middle of period */
0250     snd_pcm_hw_constraint_integer(substream->runtime,
0251                       SNDRV_PCM_HW_PARAM_PERIODS);
0252
0253     /* binding pcm substream to hda stream */
0254     substream->runtime->private_data = &dsp_stream->hstream;
0255     return 0;
0256 }
0257
0258 int hda_dsp_pcm_close(struct snd_sof_dev *sdev,
0259               struct snd_pcm_substream *substream)
0260 {
0261     struct hdac_stream *hstream = substream->runtime->private_data;
0262     int direction = substream->stream;
0263     int ret;
0264
0265     ret = hda_dsp_stream_put(sdev, direction, hstream->stream_tag);
0266
0267     if (ret) {
0268         dev_dbg(sdev->dev, "stream %s not opened!\n", substream->name);
0269         return -ENODEV;
0270     }
0271
0272     /* unbinding pcm substream to hda stream */
0273     substream->runtime->private_data = NULL;
0274     return 0;
0275 }