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Linux/sound/soc/sof/pm.c

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  1 // SPDX-License-Identifier: (GPL-2.0 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. All rights reserved.
  7 //
  8 // Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
  9 //
 10 
 11 #include "ops.h"
 12 #include "sof-priv.h"
 13 
 14 static int sof_restore_kcontrols(struct snd_sof_dev *sdev)
 15 {
 16         struct snd_sof_control *scontrol;
 17         int ipc_cmd, ctrl_type;
 18         int ret = 0;
 19 
 20         /* restore kcontrol values */
 21         list_for_each_entry(scontrol, &sdev->kcontrol_list, list) {
 22                 /* reset readback offset for scontrol after resuming */
 23                 scontrol->readback_offset = 0;
 24 
 25                 /* notify DSP of kcontrol values */
 26                 switch (scontrol->cmd) {
 27                 case SOF_CTRL_CMD_VOLUME:
 28                 case SOF_CTRL_CMD_ENUM:
 29                 case SOF_CTRL_CMD_SWITCH:
 30                         ipc_cmd = SOF_IPC_COMP_SET_VALUE;
 31                         ctrl_type = SOF_CTRL_TYPE_VALUE_CHAN_SET;
 32                         ret = snd_sof_ipc_set_get_comp_data(sdev->ipc, scontrol,
 33                                                             ipc_cmd, ctrl_type,
 34                                                             scontrol->cmd,
 35                                                             true);
 36                         break;
 37                 case SOF_CTRL_CMD_BINARY:
 38                         ipc_cmd = SOF_IPC_COMP_SET_DATA;
 39                         ctrl_type = SOF_CTRL_TYPE_DATA_SET;
 40                         ret = snd_sof_ipc_set_get_comp_data(sdev->ipc, scontrol,
 41                                                             ipc_cmd, ctrl_type,
 42                                                             scontrol->cmd,
 43                                                             true);
 44                         break;
 45 
 46                 default:
 47                         break;
 48                 }
 49 
 50                 if (ret < 0) {
 51                         dev_err(sdev->dev,
 52                                 "error: failed kcontrol value set for widget: %d\n",
 53                                 scontrol->comp_id);
 54 
 55                         return ret;
 56                 }
 57         }
 58 
 59         return 0;
 60 }
 61 
 62 static int sof_restore_pipelines(struct snd_sof_dev *sdev)
 63 {
 64         struct snd_sof_widget *swidget;
 65         struct snd_sof_route *sroute;
 66         struct sof_ipc_pipe_new *pipeline;
 67         struct snd_sof_dai *dai;
 68         struct sof_ipc_comp_dai *comp_dai;
 69         struct sof_ipc_cmd_hdr *hdr;
 70         int ret;
 71 
 72         /* restore pipeline components */
 73         list_for_each_entry_reverse(swidget, &sdev->widget_list, list) {
 74                 struct sof_ipc_comp_reply r;
 75 
 76                 /* skip if there is no private data */
 77                 if (!swidget->private)
 78                         continue;
 79 
 80                 switch (swidget->id) {
 81                 case snd_soc_dapm_dai_in:
 82                 case snd_soc_dapm_dai_out:
 83                         dai = swidget->private;
 84                         comp_dai = &dai->comp_dai;
 85                         ret = sof_ipc_tx_message(sdev->ipc,
 86                                                  comp_dai->comp.hdr.cmd,
 87                                                  comp_dai, sizeof(*comp_dai),
 88                                                  &r, sizeof(r));
 89                         break;
 90                 case snd_soc_dapm_scheduler:
 91 
 92                         /*
 93                          * During suspend, all DSP cores are powered off.
 94                          * Therefore upon resume, create the pipeline comp
 95                          * and power up the core that the pipeline is
 96                          * scheduled on.
 97                          */
 98                         pipeline = swidget->private;
 99                         ret = sof_load_pipeline_ipc(sdev, pipeline, &r);
100                         break;
101                 default:
102                         hdr = swidget->private;
103                         ret = sof_ipc_tx_message(sdev->ipc, hdr->cmd,
104                                                  swidget->private, hdr->size,
105                                                  &r, sizeof(r));
106                         break;
107                 }
108                 if (ret < 0) {
109                         dev_err(sdev->dev,
110                                 "error: failed to load widget type %d with ID: %d\n",
111                                 swidget->widget->id, swidget->comp_id);
112 
113                         return ret;
114                 }
115         }
116 
117         /* restore pipeline connections */
118         list_for_each_entry_reverse(sroute, &sdev->route_list, list) {
119                 struct sof_ipc_pipe_comp_connect *connect;
120                 struct sof_ipc_reply reply;
121 
122                 /* skip if there's no private data */
123                 if (!sroute->private)
124                         continue;
125 
126                 connect = sroute->private;
127 
128                 /* send ipc */
129                 ret = sof_ipc_tx_message(sdev->ipc,
130                                          connect->hdr.cmd,
131                                          connect, sizeof(*connect),
132                                          &reply, sizeof(reply));
133                 if (ret < 0) {
134                         dev_err(sdev->dev,
135                                 "error: failed to load route sink %s control %s source %s\n",
136                                 sroute->route->sink,
137                                 sroute->route->control ? sroute->route->control
138                                         : "none",
139                                 sroute->route->source);
140 
141                         return ret;
142                 }
143         }
144 
145         /* restore dai links */
146         list_for_each_entry_reverse(dai, &sdev->dai_list, list) {
147                 struct sof_ipc_reply reply;
148                 struct sof_ipc_dai_config *config = dai->dai_config;
149 
150                 if (!config) {
151                         dev_err(sdev->dev, "error: no config for DAI %s\n",
152                                 dai->name);
153                         continue;
154                 }
155 
156                 /*
157                  * The link DMA channel would be invalidated for running
158                  * streams but not for streams that were in the PAUSED
159                  * state during suspend. So invalidate it here before setting
160                  * the dai config in the DSP.
161                  */
162                 if (config->type == SOF_DAI_INTEL_HDA)
163                         config->hda.link_dma_ch = DMA_CHAN_INVALID;
164 
165                 ret = sof_ipc_tx_message(sdev->ipc,
166                                          config->hdr.cmd, config,
167                                          config->hdr.size,
168                                          &reply, sizeof(reply));
169 
170                 if (ret < 0) {
171                         dev_err(sdev->dev,
172                                 "error: failed to set dai config for %s\n",
173                                 dai->name);
174 
175                         return ret;
176                 }
177         }
178 
179         /* complete pipeline */
180         list_for_each_entry(swidget, &sdev->widget_list, list) {
181                 switch (swidget->id) {
182                 case snd_soc_dapm_scheduler:
183                         swidget->complete =
184                                 snd_sof_complete_pipeline(sdev, swidget);
185                         break;
186                 default:
187                         break;
188                 }
189         }
190 
191         /* restore pipeline kcontrols */
192         ret = sof_restore_kcontrols(sdev);
193         if (ret < 0)
194                 dev_err(sdev->dev,
195                         "error: restoring kcontrols after resume\n");
196 
197         return ret;
198 }
199 
200 static int sof_send_pm_ipc(struct snd_sof_dev *sdev, int cmd)
201 {
202         struct sof_ipc_pm_ctx pm_ctx;
203         struct sof_ipc_reply reply;
204 
205         memset(&pm_ctx, 0, sizeof(pm_ctx));
206 
207         /* configure ctx save ipc message */
208         pm_ctx.hdr.size = sizeof(pm_ctx);
209         pm_ctx.hdr.cmd = SOF_IPC_GLB_PM_MSG | cmd;
210 
211         /* send ctx save ipc to dsp */
212         return sof_ipc_tx_message(sdev->ipc, pm_ctx.hdr.cmd, &pm_ctx,
213                                  sizeof(pm_ctx), &reply, sizeof(reply));
214 }
215 
216 static int sof_set_hw_params_upon_resume(struct snd_sof_dev *sdev)
217 {
218         struct snd_pcm_substream *substream;
219         struct snd_sof_pcm *spcm;
220         snd_pcm_state_t state;
221         int dir;
222 
223         /*
224          * SOF requires hw_params to be set-up internally upon resume.
225          * So, set the flag to indicate this for those streams that
226          * have been suspended.
227          */
228         list_for_each_entry(spcm, &sdev->pcm_list, list) {
229                 for (dir = 0; dir <= SNDRV_PCM_STREAM_CAPTURE; dir++) {
230                         substream = spcm->stream[dir].substream;
231                         if (!substream || !substream->runtime)
232                                 continue;
233 
234                         state = substream->runtime->status->state;
235                         if (state == SNDRV_PCM_STATE_SUSPENDED)
236                                 spcm->prepared[dir] = false;
237                 }
238         }
239 
240         /* set internal flag for BE */
241         return snd_sof_dsp_hw_params_upon_resume(sdev);
242 }
243 
244 #if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
245 static void sof_cache_debugfs(struct snd_sof_dev *sdev)
246 {
247         struct snd_sof_dfsentry *dfse;
248 
249         list_for_each_entry(dfse, &sdev->dfsentry_list, list) {
250 
251                 /* nothing to do if debugfs buffer is not IO mem */
252                 if (dfse->type == SOF_DFSENTRY_TYPE_BUF)
253                         continue;
254 
255                 /* cache memory that is only accessible in D0 */
256                 if (dfse->access_type == SOF_DEBUGFS_ACCESS_D0_ONLY)
257                         memcpy_fromio(dfse->cache_buf, dfse->io_mem,
258                                       dfse->size);
259         }
260 }
261 #endif
262 
263 static int sof_resume(struct device *dev, bool runtime_resume)
264 {
265         struct snd_sof_dev *sdev = dev_get_drvdata(dev);
266         int ret;
267 
268         /* do nothing if dsp resume callbacks are not set */
269         if (!sof_ops(sdev)->resume || !sof_ops(sdev)->runtime_resume)
270                 return 0;
271 
272         /*
273          * if the runtime_resume flag is set, call the runtime_resume routine
274          * or else call the system resume routine
275          */
276         if (runtime_resume)
277                 ret = snd_sof_dsp_runtime_resume(sdev);
278         else
279                 ret = snd_sof_dsp_resume(sdev);
280         if (ret < 0) {
281                 dev_err(sdev->dev,
282                         "error: failed to power up DSP after resume\n");
283                 return ret;
284         }
285 
286         /* load the firmware */
287         ret = snd_sof_load_firmware(sdev);
288         if (ret < 0) {
289                 dev_err(sdev->dev,
290                         "error: failed to load DSP firmware after resume %d\n",
291                         ret);
292                 return ret;
293         }
294 
295         /* boot the firmware */
296         ret = snd_sof_run_firmware(sdev);
297         if (ret < 0) {
298                 dev_err(sdev->dev,
299                         "error: failed to boot DSP firmware after resume %d\n",
300                         ret);
301                 return ret;
302         }
303 
304         /* resume DMA trace, only need send ipc */
305         ret = snd_sof_init_trace_ipc(sdev);
306         if (ret < 0) {
307                 /* non fatal */
308                 dev_warn(sdev->dev,
309                          "warning: failed to init trace after resume %d\n",
310                          ret);
311         }
312 
313         /* restore pipelines */
314         ret = sof_restore_pipelines(sdev);
315         if (ret < 0) {
316                 dev_err(sdev->dev,
317                         "error: failed to restore pipeline after resume %d\n",
318                         ret);
319                 return ret;
320         }
321 
322         /* notify DSP of system resume */
323         ret = sof_send_pm_ipc(sdev, SOF_IPC_PM_CTX_RESTORE);
324         if (ret < 0)
325                 dev_err(sdev->dev,
326                         "error: ctx_restore ipc error during resume %d\n",
327                         ret);
328 
329         return ret;
330 }
331 
332 static int sof_suspend(struct device *dev, bool runtime_suspend)
333 {
334         struct snd_sof_dev *sdev = dev_get_drvdata(dev);
335         int ret;
336 
337         /* do nothing if dsp suspend callback is not set */
338         if (!sof_ops(sdev)->suspend)
339                 return 0;
340 
341         /* release trace */
342         snd_sof_release_trace(sdev);
343 
344         /* set restore_stream for all streams during system suspend */
345         if (!runtime_suspend) {
346                 ret = sof_set_hw_params_upon_resume(sdev);
347                 if (ret < 0) {
348                         dev_err(sdev->dev,
349                                 "error: setting hw_params flag during suspend %d\n",
350                                 ret);
351                         return ret;
352                 }
353         }
354 
355 #if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
356         /* cache debugfs contents during runtime suspend */
357         if (runtime_suspend)
358                 sof_cache_debugfs(sdev);
359 #endif
360         /* notify DSP of upcoming power down */
361         ret = sof_send_pm_ipc(sdev, SOF_IPC_PM_CTX_SAVE);
362         if (ret == -EBUSY || ret == -EAGAIN) {
363                 /*
364                  * runtime PM has logic to handle -EBUSY/-EAGAIN so
365                  * pass these errors up
366                  */
367                 dev_err(sdev->dev,
368                         "error: ctx_save ipc error during suspend %d\n",
369                         ret);
370                 return ret;
371         } else if (ret < 0) {
372                 /* FW in unexpected state, continue to power down */
373                 dev_warn(sdev->dev,
374                          "ctx_save ipc error %d, proceeding with suspend\n",
375                          ret);
376         }
377 
378         /* power down all DSP cores */
379         if (runtime_suspend)
380                 ret = snd_sof_dsp_runtime_suspend(sdev, 0);
381         else
382                 ret = snd_sof_dsp_suspend(sdev, 0);
383         if (ret < 0)
384                 dev_err(sdev->dev,
385                         "error: failed to power down DSP during suspend %d\n",
386                         ret);
387 
388         return ret;
389 }
390 
391 int snd_sof_runtime_suspend(struct device *dev)
392 {
393         return sof_suspend(dev, true);
394 }
395 EXPORT_SYMBOL(snd_sof_runtime_suspend);
396 
397 int snd_sof_runtime_idle(struct device *dev)
398 {
399         struct snd_sof_dev *sdev = dev_get_drvdata(dev);
400 
401         return snd_sof_dsp_runtime_idle(sdev);
402 }
403 EXPORT_SYMBOL(snd_sof_runtime_idle);
404 
405 int snd_sof_runtime_resume(struct device *dev)
406 {
407         return sof_resume(dev, true);
408 }
409 EXPORT_SYMBOL(snd_sof_runtime_resume);
410 
411 int snd_sof_resume(struct device *dev)
412 {
413         return sof_resume(dev, false);
414 }
415 EXPORT_SYMBOL(snd_sof_resume);
416 
417 int snd_sof_suspend(struct device *dev)
418 {
419         return sof_suspend(dev, false);
420 }
421 EXPORT_SYMBOL(snd_sof_suspend);
422 

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