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) 2018 Intel Corporation 7 // 8 // Authors: Liam Girdwood <liam.r.girdwood@linux.intel.com> 9 // Ranjani Sridharan <ranjani.sridharan@linux.intel.com> 10 // Rander Wang <rander.wang@intel.com> 11 // Keyon Jie <yang.jie@linux.intel.com> 12 // 13 14 /* 15 * Hardware interface for generic Intel audio DSP HDA IP 16 */ 17 18 #include <linux/moduleparam.h> 19 #include <sound/hda_register.h> 20 #include <sound/pcm_params.h> 21 #include <trace/events/sof_intel.h> 22 #include "../sof-audio.h" 23 #include "../ops.h" 24 #include "hda.h" 25 26 #define SDnFMT_BASE(x) ((x) << 14) 27 #define SDnFMT_MULT(x) (((x) - 1) << 11) 28 #define SDnFMT_DIV(x) (((x) - 1) << 8) 29 #define SDnFMT_BITS(x) ((x) << 4) 30 #define SDnFMT_CHAN(x) ((x) << 0) 31 32 static bool hda_always_enable_dmi_l1; 33 module_param_named(always_enable_dmi_l1, hda_always_enable_dmi_l1, bool, 0444); 34 MODULE_PARM_DESC(always_enable_dmi_l1, "SOF HDA always enable DMI l1"); 35 36 static bool hda_disable_rewinds; 37 module_param_named(disable_rewinds, hda_disable_rewinds, bool, 0444); 38 MODULE_PARM_DESC(disable_rewinds, "SOF HDA disable rewinds"); 39 40 u32 hda_dsp_get_mult_div(struct snd_sof_dev *sdev, int rate) 41 { 42 switch (rate) { 43 case 8000: 44 return SDnFMT_DIV(6); 45 case 9600: 46 return SDnFMT_DIV(5); 47 case 11025: 48 return SDnFMT_BASE(1) | SDnFMT_DIV(4); 49 case 16000: 50 return SDnFMT_DIV(3); 51 case 22050: 52 return SDnFMT_BASE(1) | SDnFMT_DIV(2); 53 case 32000: 54 return SDnFMT_DIV(3) | SDnFMT_MULT(2); 55 case 44100: 56 return SDnFMT_BASE(1); 57 case 48000: 58 return 0; 59 case 88200: 60 return SDnFMT_BASE(1) | SDnFMT_MULT(2); 61 case 96000: 62 return SDnFMT_MULT(2); 63 case 176400: 64 return SDnFMT_BASE(1) | SDnFMT_MULT(4); 65 case 192000: 66 return SDnFMT_MULT(4); 67 default: 68 dev_warn(sdev->dev, "can't find div rate %d using 48kHz\n", 69 rate); 70 return 0; /* use 48KHz if not found */ 71 } 72 }; 73 74 u32 hda_dsp_get_bits(struct snd_sof_dev *sdev, int sample_bits) 75 { 76 switch (sample_bits) { 77 case 8: 78 return SDnFMT_BITS(0); 79 case 16: 80 return SDnFMT_BITS(1); 81 case 20: 82 return SDnFMT_BITS(2); 83 case 24: 84 return SDnFMT_BITS(3); 85 case 32: 86 return SDnFMT_BITS(4); 87 default: 88 dev_warn(sdev->dev, "can't find %d bits using 16bit\n", 89 sample_bits); 90 return SDnFMT_BITS(1); /* use 16bits format if not found */ 91 } 92 }; 93 94 int hda_dsp_pcm_hw_params(struct snd_sof_dev *sdev, 95 struct snd_pcm_substream *substream, 96 struct snd_pcm_hw_params *params, 97 struct snd_sof_platform_stream_params *platform_params) 98 { 99 struct hdac_stream *hstream = substream->runtime->private_data; 100 struct hdac_ext_stream *hext_stream = stream_to_hdac_ext_stream(hstream); 101 struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata; 102 struct snd_dma_buffer *dmab; 103 int ret; 104 105 hstream->substream = substream; 106 107 dmab = substream->runtime->dma_buffer_p; 108 109 /* 110 * Use the codec required format val (which is link_bps adjusted) when 111 * the DSP is not in use 112 */ 113 if (!sdev->dspless_mode_selected) { 114 u32 rate = hda_dsp_get_mult_div(sdev, params_rate(params)); 115 u32 bits = hda_dsp_get_bits(sdev, params_width(params)); 116 117 hstream->format_val = rate | bits | (params_channels(params) - 1); 118 } 119 120 hstream->bufsize = params_buffer_bytes(params); 121 hstream->period_bytes = params_period_bytes(params); 122 hstream->no_period_wakeup = 123 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && 124 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); 125 126 ret = hda_dsp_stream_hw_params(sdev, hext_stream, dmab, params); 127 if (ret < 0) { 128 dev_err(sdev->dev, "error: hdac prepare failed: %d\n", ret); 129 return ret; 130 } 131 132 /* enable SPIB when rewinds are disabled */ 133 if (hda_disable_rewinds) 134 hda_dsp_stream_spib_config(sdev, hext_stream, HDA_DSP_SPIB_ENABLE, 0); 135 else 136 hda_dsp_stream_spib_config(sdev, hext_stream, HDA_DSP_SPIB_DISABLE, 0); 137 138 if (hda) 139 platform_params->no_ipc_position = hda->no_ipc_position; 140 141 platform_params->stream_tag = hstream->stream_tag; 142 143 return 0; 144 } 145 EXPORT_SYMBOL_NS(hda_dsp_pcm_hw_params, SND_SOC_SOF_INTEL_HDA_COMMON); 146 147 /* update SPIB register with appl position */ 148 int hda_dsp_pcm_ack(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream) 149 { 150 struct hdac_stream *hstream = substream->runtime->private_data; 151 struct snd_pcm_runtime *runtime = substream->runtime; 152 ssize_t appl_pos, buf_size; 153 u32 spib; 154 155 appl_pos = frames_to_bytes(runtime, runtime->control->appl_ptr); 156 buf_size = frames_to_bytes(runtime, runtime->buffer_size); 157 158 spib = appl_pos % buf_size; 159 160 /* Allowable value for SPIB is 1 byte to max buffer size */ 161 if (!spib) 162 spib = buf_size; 163 164 sof_io_write(sdev, hstream->spib_addr, spib); 165 166 return 0; 167 } 168 EXPORT_SYMBOL_NS(hda_dsp_pcm_ack, SND_SOC_SOF_INTEL_HDA_COMMON); 169 170 int hda_dsp_pcm_trigger(struct snd_sof_dev *sdev, 171 struct snd_pcm_substream *substream, int cmd) 172 { 173 struct hdac_stream *hstream = substream->runtime->private_data; 174 struct hdac_ext_stream *hext_stream = stream_to_hdac_ext_stream(hstream); 175 176 return hda_dsp_stream_trigger(sdev, hext_stream, cmd); 177 } 178 EXPORT_SYMBOL_NS(hda_dsp_pcm_trigger, SND_SOC_SOF_INTEL_HDA_COMMON); 179 180 snd_pcm_uframes_t hda_dsp_pcm_pointer(struct snd_sof_dev *sdev, 181 struct snd_pcm_substream *substream) 182 { 183 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 184 struct snd_soc_component *scomp = sdev->component; 185 struct hdac_stream *hstream = substream->runtime->private_data; 186 struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata; 187 struct snd_sof_pcm *spcm; 188 snd_pcm_uframes_t pos; 189 190 spcm = snd_sof_find_spcm_dai(scomp, rtd); 191 if (!spcm) { 192 dev_warn_ratelimited(sdev->dev, "warn: can't find PCM with DAI ID %d\n", 193 rtd->dai_link->id); 194 return 0; 195 } 196 197 if (hda && !hda->no_ipc_position) { 198 /* read position from IPC position */ 199 pos = spcm->stream[substream->stream].posn.host_posn; 200 goto found; 201 } 202 203 pos = hda_dsp_stream_get_position(hstream, substream->stream, true); 204 found: 205 pos = bytes_to_frames(substream->runtime, pos); 206 207 trace_sof_intel_hda_dsp_pcm(sdev, hstream, substream, pos); 208 return pos; 209 } 210 EXPORT_SYMBOL_NS(hda_dsp_pcm_pointer, SND_SOC_SOF_INTEL_HDA_COMMON); 211 212 int hda_dsp_pcm_open(struct snd_sof_dev *sdev, 213 struct snd_pcm_substream *substream) 214 { 215 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 216 struct snd_pcm_runtime *runtime = substream->runtime; 217 struct snd_soc_component *scomp = sdev->component; 218 struct hdac_ext_stream *dsp_stream; 219 struct snd_sof_pcm *spcm; 220 int direction = substream->stream; 221 u32 flags = 0; 222 223 spcm = snd_sof_find_spcm_dai(scomp, rtd); 224 if (!spcm) { 225 dev_err(sdev->dev, "error: can't find PCM with DAI ID %d\n", rtd->dai_link->id); 226 return -EINVAL; 227 } 228 229 /* 230 * if we want the .ack to work, we need to prevent the control from being mapped. 231 * The status can still be mapped. 232 */ 233 if (hda_disable_rewinds) 234 runtime->hw.info |= SNDRV_PCM_INFO_NO_REWINDS | SNDRV_PCM_INFO_SYNC_APPLPTR; 235 236 /* 237 * All playback streams are DMI L1 capable, capture streams need 238 * pause push/release to be disabled 239 */ 240 if (hda_always_enable_dmi_l1 && direction == SNDRV_PCM_STREAM_CAPTURE) 241 runtime->hw.info &= ~SNDRV_PCM_INFO_PAUSE; 242 243 if (hda_always_enable_dmi_l1 || 244 direction == SNDRV_PCM_STREAM_PLAYBACK || 245 spcm->stream[substream->stream].d0i3_compatible) 246 flags |= SOF_HDA_STREAM_DMI_L1_COMPATIBLE; 247 248 dsp_stream = hda_dsp_stream_get(sdev, direction, flags); 249 if (!dsp_stream) { 250 dev_err(sdev->dev, "error: no stream available\n"); 251 return -ENODEV; 252 } 253 254 /* minimum as per HDA spec */ 255 snd_pcm_hw_constraint_step(substream->runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 4); 256 257 /* avoid circular buffer wrap in middle of period */ 258 snd_pcm_hw_constraint_integer(substream->runtime, 259 SNDRV_PCM_HW_PARAM_PERIODS); 260 261 /* Limit the maximum number of periods to not exceed the BDL entries count */ 262 if (runtime->hw.periods_max > HDA_DSP_MAX_BDL_ENTRIES) 263 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 264 runtime->hw.periods_min, 265 HDA_DSP_MAX_BDL_ENTRIES); 266 267 /* Only S16 and S32 supported by HDA hardware when used without DSP */ 268 if (sdev->dspless_mode_selected) 269 snd_pcm_hw_constraint_mask64(substream->runtime, SNDRV_PCM_HW_PARAM_FORMAT, 270 SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S32); 271 272 /* 273 * The dsp_max_burst_size_in_ms is the length of the maximum burst size 274 * of the host DMA in the ALSA buffer. 275 * 276 * On playback start the DMA will transfer dsp_max_burst_size_in_ms 277 * amount of data in one initial burst to fill up the host DMA buffer. 278 * Consequent DMA burst sizes are shorter and their length can vary. 279 * To make sure that userspace allocate large enough ALSA buffer we need 280 * to place a constraint on the buffer time. 281 * 282 * On capture the DMA will transfer 1ms chunks. 283 * 284 * Exact dsp_max_burst_size_in_ms constraint is racy, so set the 285 * constraint to a minimum of 2x dsp_max_burst_size_in_ms. 286 */ 287 if (spcm->stream[direction].dsp_max_burst_size_in_ms) 288 snd_pcm_hw_constraint_minmax(substream->runtime, 289 SNDRV_PCM_HW_PARAM_BUFFER_TIME, 290 spcm->stream[direction].dsp_max_burst_size_in_ms * USEC_PER_MSEC * 2, 291 UINT_MAX); 292 293 /* binding pcm substream to hda stream */ 294 substream->runtime->private_data = &dsp_stream->hstream; 295 296 /* 297 * Reset the llp cache values (they are used for LLP compensation in 298 * case the counter is not reset) 299 */ 300 dsp_stream->pplcllpl = 0; 301 dsp_stream->pplcllpu = 0; 302 303 return 0; 304 } 305 EXPORT_SYMBOL_NS(hda_dsp_pcm_open, SND_SOC_SOF_INTEL_HDA_COMMON); 306 307 int hda_dsp_pcm_close(struct snd_sof_dev *sdev, 308 struct snd_pcm_substream *substream) 309 { 310 struct hdac_stream *hstream = substream->runtime->private_data; 311 int direction = substream->stream; 312 int ret; 313 314 ret = hda_dsp_stream_put(sdev, direction, hstream->stream_tag); 315 316 if (ret) { 317 dev_dbg(sdev->dev, "stream %s not opened!\n", substream->name); 318 return -ENODEV; 319 } 320 321 /* unbinding pcm substream to hda stream */ 322 substream->runtime->private_data = NULL; 323 return 0; 324 } 325 EXPORT_SYMBOL_NS(hda_dsp_pcm_close, SND_SOC_SOF_INTEL_HDA_COMMON); 326