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 static int hda_force_pause_support = -1; 41 module_param_named(force_pause_support, hda_force_pause_support, int, 0444); 42 MODULE_PARM_DESC(force_pause_support, 43 "Pause support: -1: Use default, 0: Disable, 1: Enable (default -1)"); 44 45 u32 hda_dsp_get_mult_div(struct snd_sof_dev *sdev, int rate) 46 { 47 switch (rate) { 48 case 8000: 49 return SDnFMT_DIV(6); 50 case 9600: 51 return SDnFMT_DIV(5); 52 case 11025: 53 return SDnFMT_BASE(1) | SDnFMT_DIV(4); 54 case 16000: 55 return SDnFMT_DIV(3); 56 case 22050: 57 return SDnFMT_BASE(1) | SDnFMT_DIV(2); 58 case 32000: 59 return SDnFMT_DIV(3) | SDnFMT_MULT(2); 60 case 44100: 61 return SDnFMT_BASE(1); 62 case 48000: 63 return 0; 64 case 88200: 65 return SDnFMT_BASE(1) | SDnFMT_MULT(2); 66 case 96000: 67 return SDnFMT_MULT(2); 68 case 176400: 69 return SDnFMT_BASE(1) | SDnFMT_MULT(4); 70 case 192000: 71 return SDnFMT_MULT(4); 72 default: 73 dev_warn(sdev->dev, "can't find div rate %d using 48kHz\n", 74 rate); 75 return 0; /* use 48KHz if not found */ 76 } 77 }; 78 79 u32 hda_dsp_get_bits(struct snd_sof_dev *sdev, int sample_bits) 80 { 81 switch (sample_bits) { 82 case 8: 83 return SDnFMT_BITS(0); 84 case 16: 85 return SDnFMT_BITS(1); 86 case 20: 87 return SDnFMT_BITS(2); 88 case 24: 89 return SDnFMT_BITS(3); 90 case 32: 91 return SDnFMT_BITS(4); 92 default: 93 dev_warn(sdev->dev, "can't find %d bits using 16bit\n", 94 sample_bits); 95 return SDnFMT_BITS(1); /* use 16bits format if not found */ 96 } 97 }; 98 99 int hda_dsp_pcm_hw_params(struct snd_sof_dev *sdev, 100 struct snd_pcm_substream *substream, 101 struct snd_pcm_hw_params *params, 102 struct snd_sof_platform_stream_params *platform_params) 103 { 104 struct hdac_stream *hstream = substream->runtime->private_data; 105 struct hdac_ext_stream *hext_stream = stream_to_hdac_ext_stream(hstream); 106 struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata; 107 struct snd_dma_buffer *dmab; 108 int ret; 109 110 hstream->substream = substream; 111 112 dmab = substream->runtime->dma_buffer_p; 113 114 /* 115 * Use the codec required format val (which is link_bps adjusted) when 116 * the DSP is not in use 117 */ 118 if (!sdev->dspless_mode_selected) { 119 u32 rate = hda_dsp_get_mult_div(sdev, params_rate(params)); 120 u32 bits = hda_dsp_get_bits(sdev, params_width(params)); 121 122 hstream->format_val = rate | bits | (params_channels(params) - 1); 123 } 124 125 hstream->bufsize = params_buffer_bytes(params); 126 hstream->period_bytes = params_period_bytes(params); 127 hstream->no_period_wakeup = 128 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && 129 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); 130 131 ret = hda_dsp_stream_hw_params(sdev, hext_stream, dmab, params); 132 if (ret < 0) { 133 dev_err(sdev->dev, "error: hdac prepare failed: %d\n", ret); 134 return ret; 135 } 136 137 /* enable SPIB when rewinds are disabled */ 138 if (hda_disable_rewinds) 139 hda_dsp_stream_spib_config(sdev, hext_stream, HDA_DSP_SPIB_ENABLE, 0); 140 else 141 hda_dsp_stream_spib_config(sdev, hext_stream, HDA_DSP_SPIB_DISABLE, 0); 142 143 if (hda) 144 platform_params->no_ipc_position = hda->no_ipc_position; 145 146 platform_params->stream_tag = hstream->stream_tag; 147 148 return 0; 149 } 150 EXPORT_SYMBOL_NS(hda_dsp_pcm_hw_params, "SND_SOC_SOF_INTEL_HDA_COMMON"); 151 152 /* update SPIB register with appl position */ 153 int hda_dsp_pcm_ack(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream) 154 { 155 struct hdac_stream *hstream = substream->runtime->private_data; 156 struct snd_pcm_runtime *runtime = substream->runtime; 157 ssize_t appl_pos, buf_size; 158 u32 spib; 159 160 appl_pos = frames_to_bytes(runtime, runtime->control->appl_ptr); 161 buf_size = frames_to_bytes(runtime, runtime->buffer_size); 162 163 spib = appl_pos % buf_size; 164 165 /* Allowable value for SPIB is 1 byte to max buffer size */ 166 if (!spib) 167 spib = buf_size; 168 169 sof_io_write(sdev, hstream->spib_addr, spib); 170 171 return 0; 172 } 173 EXPORT_SYMBOL_NS(hda_dsp_pcm_ack, "SND_SOC_SOF_INTEL_HDA_COMMON"); 174 175 int hda_dsp_pcm_trigger(struct snd_sof_dev *sdev, 176 struct snd_pcm_substream *substream, int cmd) 177 { 178 struct hdac_stream *hstream = substream->runtime->private_data; 179 struct hdac_ext_stream *hext_stream = stream_to_hdac_ext_stream(hstream); 180 181 return hda_dsp_stream_trigger(sdev, hext_stream, cmd); 182 } 183 EXPORT_SYMBOL_NS(hda_dsp_pcm_trigger, "SND_SOC_SOF_INTEL_HDA_COMMON"); 184 185 snd_pcm_uframes_t hda_dsp_pcm_pointer(struct snd_sof_dev *sdev, 186 struct snd_pcm_substream *substream) 187 { 188 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 189 struct snd_soc_component *scomp = sdev->component; 190 struct hdac_stream *hstream = substream->runtime->private_data; 191 struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata; 192 struct snd_sof_pcm *spcm; 193 snd_pcm_uframes_t pos; 194 195 spcm = snd_sof_find_spcm_dai(scomp, rtd); 196 if (!spcm) { 197 dev_warn_ratelimited(sdev->dev, "warn: can't find PCM with DAI ID %d\n", 198 rtd->dai_link->id); 199 return 0; 200 } 201 202 if (hda && !hda->no_ipc_position) { 203 /* read position from IPC position */ 204 pos = spcm->stream[substream->stream].posn.host_posn; 205 goto found; 206 } 207 208 pos = hda_dsp_stream_get_position(hstream, substream->stream, true); 209 found: 210 pos = bytes_to_frames(substream->runtime, pos); 211 212 trace_sof_intel_hda_dsp_pcm(sdev, hstream, substream, pos); 213 return pos; 214 } 215 EXPORT_SYMBOL_NS(hda_dsp_pcm_pointer, "SND_SOC_SOF_INTEL_HDA_COMMON"); 216 217 int hda_dsp_pcm_open(struct snd_sof_dev *sdev, 218 struct snd_pcm_substream *substream) 219 { 220 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 221 struct snd_pcm_runtime *runtime = substream->runtime; 222 struct snd_soc_component *scomp = sdev->component; 223 struct hdac_ext_stream *dsp_stream; 224 struct snd_sof_pcm *spcm; 225 int direction = substream->stream; 226 u32 flags = 0; 227 228 spcm = snd_sof_find_spcm_dai(scomp, rtd); 229 if (!spcm) { 230 dev_err(sdev->dev, "error: can't find PCM with DAI ID %d\n", rtd->dai_link->id); 231 return -EINVAL; 232 } 233 234 /* 235 * if we want the .ack to work, we need to prevent the control from being mapped. 236 * The status can still be mapped. 237 */ 238 if (hda_disable_rewinds) 239 runtime->hw.info |= SNDRV_PCM_INFO_NO_REWINDS | SNDRV_PCM_INFO_SYNC_APPLPTR; 240 241 /* 242 * All playback streams are DMI L1 capable, capture streams need 243 * pause push/release to be disabled 244 */ 245 if (hda_always_enable_dmi_l1 && direction == SNDRV_PCM_STREAM_CAPTURE) 246 runtime->hw.info &= ~SNDRV_PCM_INFO_PAUSE; 247 248 /* 249 * Do not advertise the PAUSE support if it is forced to be disabled via 250 * module parameter or if the pause_supported is false for the PCM 251 * device 252 */ 253 if (hda_force_pause_support == 0 || 254 (hda_force_pause_support == -1 && 255 !spcm->stream[substream->stream].pause_supported)) 256 runtime->hw.info &= ~SNDRV_PCM_INFO_PAUSE; 257 258 if (hda_always_enable_dmi_l1 || 259 direction == SNDRV_PCM_STREAM_PLAYBACK || 260 spcm->stream[substream->stream].d0i3_compatible) 261 flags |= SOF_HDA_STREAM_DMI_L1_COMPATIBLE; 262 263 dsp_stream = hda_dsp_stream_get(sdev, direction, flags); 264 if (!dsp_stream) { 265 dev_err(sdev->dev, "error: no stream available\n"); 266 return -ENODEV; 267 } 268 269 /* minimum as per HDA spec */ 270 snd_pcm_hw_constraint_step(substream->runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 4); 271 272 /* avoid circular buffer wrap in middle of period */ 273 snd_pcm_hw_constraint_integer(substream->runtime, 274 SNDRV_PCM_HW_PARAM_PERIODS); 275 276 /* Limit the maximum number of periods to not exceed the BDL entries count */ 277 if (runtime->hw.periods_max > HDA_DSP_MAX_BDL_ENTRIES) 278 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 279 runtime->hw.periods_min, 280 HDA_DSP_MAX_BDL_ENTRIES); 281 282 /* Only S16 and S32 supported by HDA hardware when used without DSP */ 283 if (sdev->dspless_mode_selected) 284 snd_pcm_hw_constraint_mask64(substream->runtime, SNDRV_PCM_HW_PARAM_FORMAT, 285 SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S32); 286 287 /* 288 * The dsp_max_burst_size_in_ms is the length of the maximum burst size 289 * of the host DMA in the ALSA buffer. 290 * 291 * On playback start the DMA will transfer dsp_max_burst_size_in_ms 292 * amount of data in one initial burst to fill up the host DMA buffer. 293 * Consequent DMA burst sizes are shorter and their length can vary. 294 * To make sure that userspace allocate large enough ALSA buffer we need 295 * to place a constraint on the buffer time. 296 * 297 * On capture the DMA will transfer 1ms chunks. 298 * 299 * Exact dsp_max_burst_size_in_ms constraint is racy, so set the 300 * constraint to a minimum of 2x dsp_max_burst_size_in_ms. 301 */ 302 if (spcm->stream[direction].dsp_max_burst_size_in_ms) 303 snd_pcm_hw_constraint_minmax(substream->runtime, 304 SNDRV_PCM_HW_PARAM_BUFFER_TIME, 305 spcm->stream[direction].dsp_max_burst_size_in_ms * USEC_PER_MSEC * 2, 306 UINT_MAX); 307 308 /* binding pcm substream to hda stream */ 309 substream->runtime->private_data = &dsp_stream->hstream; 310 311 /* 312 * Reset the llp cache values (they are used for LLP compensation in 313 * case the counter is not reset) 314 */ 315 dsp_stream->pplcllpl = 0; 316 dsp_stream->pplcllpu = 0; 317 318 return 0; 319 } 320 EXPORT_SYMBOL_NS(hda_dsp_pcm_open, "SND_SOC_SOF_INTEL_HDA_COMMON"); 321 322 int hda_dsp_pcm_close(struct snd_sof_dev *sdev, 323 struct snd_pcm_substream *substream) 324 { 325 struct hdac_stream *hstream = substream->runtime->private_data; 326 int direction = substream->stream; 327 int ret; 328 329 ret = hda_dsp_stream_put(sdev, direction, hstream->stream_tag); 330 331 if (ret) { 332 dev_dbg(sdev->dev, "stream %s not opened!\n", substream->name); 333 return -ENODEV; 334 } 335 336 /* unbinding pcm substream to hda stream */ 337 substream->runtime->private_data = NULL; 338 return 0; 339 } 340 EXPORT_SYMBOL_NS(hda_dsp_pcm_close, "SND_SOC_SOF_INTEL_HDA_COMMON"); 341