1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
|
// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
//
// This file is provided under a dual BSD/GPLv2 license. When using or
// redistributing this file, you may do so under either license.
//
// Copyright(c) 2018 Intel Corporation. All rights reserved.
//
// Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
//
#include "ops.h"
#include "sof-priv.h"
#include "sof-audio.h"
static int sof_send_pm_ctx_ipc(struct snd_sof_dev *sdev, int cmd)
{
struct sof_ipc_pm_ctx pm_ctx;
struct sof_ipc_reply reply;
memset(&pm_ctx, 0, sizeof(pm_ctx));
/* configure ctx save ipc message */
pm_ctx.hdr.size = sizeof(pm_ctx);
pm_ctx.hdr.cmd = SOF_IPC_GLB_PM_MSG | cmd;
/* send ctx save ipc to dsp */
return sof_ipc_tx_message(sdev->ipc, pm_ctx.hdr.cmd, &pm_ctx,
sizeof(pm_ctx), &reply, sizeof(reply));
}
#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
static void sof_cache_debugfs(struct snd_sof_dev *sdev)
{
struct snd_sof_dfsentry *dfse;
list_for_each_entry(dfse, &sdev->dfsentry_list, list) {
/* nothing to do if debugfs buffer is not IO mem */
if (dfse->type == SOF_DFSENTRY_TYPE_BUF)
continue;
/* cache memory that is only accessible in D0 */
if (dfse->access_type == SOF_DEBUGFS_ACCESS_D0_ONLY)
memcpy_fromio(dfse->cache_buf, dfse->io_mem,
dfse->size);
}
}
#endif
static int sof_resume(struct device *dev, bool runtime_resume)
{
struct snd_sof_dev *sdev = dev_get_drvdata(dev);
enum sof_d0_substate old_d0_substate = sdev->d0_substate;
int ret;
/* do nothing if dsp resume callbacks are not set */
if (!sof_ops(sdev)->resume || !sof_ops(sdev)->runtime_resume)
return 0;
/* DSP was never successfully started, nothing to resume */
if (sdev->first_boot)
return 0;
/* resume from D0I3 */
if (!runtime_resume && old_d0_substate == SOF_DSP_D0I3) {
ret = snd_sof_set_d0_substate(sdev, SOF_DSP_D0I0);
if (ret < 0 && ret != -ENOTSUPP) {
dev_err(sdev->dev,
"error: failed to resume from D0I3 %d\n",
ret);
return ret;
}
}
/*
* if the runtime_resume flag is set, call the runtime_resume routine
* or else call the system resume routine
*/
if (runtime_resume)
ret = snd_sof_dsp_runtime_resume(sdev);
else
ret = snd_sof_dsp_resume(sdev);
if (ret < 0) {
dev_err(sdev->dev,
"error: failed to power up DSP after resume\n");
return ret;
}
/* Nothing further to do if resuming from D0I3 */
if (!runtime_resume && old_d0_substate == SOF_DSP_D0I3)
return 0;
sdev->fw_state = SOF_FW_BOOT_PREPARE;
/* load the firmware */
ret = snd_sof_load_firmware(sdev);
if (ret < 0) {
dev_err(sdev->dev,
"error: failed to load DSP firmware after resume %d\n",
ret);
return ret;
}
sdev->fw_state = SOF_FW_BOOT_IN_PROGRESS;
/*
* Boot the firmware. The FW boot status will be modified
* in snd_sof_run_firmware() depending on the outcome.
*/
ret = snd_sof_run_firmware(sdev);
if (ret < 0) {
dev_err(sdev->dev,
"error: failed to boot DSP firmware after resume %d\n",
ret);
return ret;
}
/* resume DMA trace, only need send ipc */
ret = snd_sof_init_trace_ipc(sdev);
if (ret < 0) {
/* non fatal */
dev_warn(sdev->dev,
"warning: failed to init trace after resume %d\n",
ret);
}
/* restore pipelines */
ret = sof_restore_pipelines(sdev->dev);
if (ret < 0) {
dev_err(sdev->dev,
"error: failed to restore pipeline after resume %d\n",
ret);
return ret;
}
/* notify DSP of system resume */
ret = sof_send_pm_ctx_ipc(sdev, SOF_IPC_PM_CTX_RESTORE);
if (ret < 0)
dev_err(sdev->dev,
"error: ctx_restore ipc error during resume %d\n",
ret);
/* initialize default D0 sub-state */
sdev->d0_substate = SOF_DSP_D0I0;
return ret;
}
static int sof_suspend(struct device *dev, bool runtime_suspend)
{
struct snd_sof_dev *sdev = dev_get_drvdata(dev);
int ret;
/* do nothing if dsp suspend callback is not set */
if (!sof_ops(sdev)->suspend)
return 0;
if (sdev->fw_state != SOF_FW_BOOT_COMPLETE)
goto suspend;
/* set restore_stream for all streams during system suspend */
if (!runtime_suspend) {
ret = sof_set_hw_params_upon_resume(sdev->dev);
if (ret < 0) {
dev_err(sdev->dev,
"error: setting hw_params flag during suspend %d\n",
ret);
return ret;
}
}
if (snd_sof_dsp_d0i3_on_suspend(sdev)) {
/* suspend to D0i3 */
ret = snd_sof_set_d0_substate(sdev, SOF_DSP_D0I3);
if (ret < 0) {
dev_err(sdev->dev, "error: failed to enter D0I3, %d\n",
ret);
return ret;
}
/* Skip to platform-specific suspend if DSP is entering D0I3 */
goto suspend;
}
/* release trace */
snd_sof_release_trace(sdev);
#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
/* cache debugfs contents during runtime suspend */
if (runtime_suspend)
sof_cache_debugfs(sdev);
#endif
/* notify DSP of upcoming power down */
ret = sof_send_pm_ctx_ipc(sdev, SOF_IPC_PM_CTX_SAVE);
if (ret == -EBUSY || ret == -EAGAIN) {
/*
* runtime PM has logic to handle -EBUSY/-EAGAIN so
* pass these errors up
*/
dev_err(sdev->dev,
"error: ctx_save ipc error during suspend %d\n",
ret);
return ret;
} else if (ret < 0) {
/* FW in unexpected state, continue to power down */
dev_warn(sdev->dev,
"ctx_save ipc error %d, proceeding with suspend\n",
ret);
}
suspend:
/* return if the DSP was not probed successfully */
if (sdev->fw_state == SOF_FW_BOOT_NOT_STARTED)
return 0;
/* platform-specific suspend */
if (runtime_suspend)
ret = snd_sof_dsp_runtime_suspend(sdev);
else
ret = snd_sof_dsp_suspend(sdev);
if (ret < 0)
dev_err(sdev->dev,
"error: failed to power down DSP during suspend %d\n",
ret);
/* Do not reset FW state if DSP is in D0I3 */
if (sdev->d0_substate == SOF_DSP_D0I3)
return ret;
/* reset FW state */
sdev->fw_state = SOF_FW_BOOT_NOT_STARTED;
return ret;
}
int snd_sof_runtime_suspend(struct device *dev)
{
return sof_suspend(dev, true);
}
EXPORT_SYMBOL(snd_sof_runtime_suspend);
int snd_sof_runtime_idle(struct device *dev)
{
struct snd_sof_dev *sdev = dev_get_drvdata(dev);
return snd_sof_dsp_runtime_idle(sdev);
}
EXPORT_SYMBOL(snd_sof_runtime_idle);
int snd_sof_runtime_resume(struct device *dev)
{
return sof_resume(dev, true);
}
EXPORT_SYMBOL(snd_sof_runtime_resume);
int snd_sof_set_d0_substate(struct snd_sof_dev *sdev,
enum sof_d0_substate d0_substate)
{
int ret;
if (sdev->d0_substate == d0_substate)
return 0;
/* do platform specific set_state */
ret = snd_sof_dsp_set_power_state(sdev, d0_substate);
if (ret < 0)
return ret;
/* update dsp D0 sub-state */
sdev->d0_substate = d0_substate;
return 0;
}
EXPORT_SYMBOL(snd_sof_set_d0_substate);
/*
* Audio DSP states may transform as below:-
*
* D0I3 compatible stream
* Runtime +---------------------+ opened only, timeout
* suspend | +--------------------+
* +------------+ D0(active) | |
* | | <---------------+ |
* | +--------> | | |
* | |Runtime +--^--+---------^--+--+ The last | |
* | |resume | | | | opened D0I3 | |
* | | | | | | compatible | |
* | | resume| | | | stream closed | |
* | | from | | D3 | | | |
* | | D3 | |suspend | | d0i3 | |
* | | | | | |suspend | |
* | | | | | | | |
* | | | | | | | |
* +-v---+-----------+--v-------+ | | +------+----v----+
* | | | +-----------> |
* | D3 (suspended) | | | D0I3 +-----+
* | | +--------------+ | |
* | | resume from | | |
* +-------------------^--------+ d0i3 suspend +----------------+ |
* | |
* | D3 suspend |
* +------------------------------------------------+
*
* d0i3_suspend = s0_suspend && D0I3 stream opened,
* D3 suspend = !d0i3_suspend,
*/
int snd_sof_resume(struct device *dev)
{
return sof_resume(dev, false);
}
EXPORT_SYMBOL(snd_sof_resume);
int snd_sof_suspend(struct device *dev)
{
return sof_suspend(dev, false);
}
EXPORT_SYMBOL(snd_sof_suspend);
int snd_sof_prepare(struct device *dev)
{
struct snd_sof_dev *sdev = dev_get_drvdata(dev);
#if defined(CONFIG_ACPI)
sdev->s0_suspend = acpi_target_system_state() == ACPI_STATE_S0;
#else
/* will suspend to S3 by default */
sdev->s0_suspend = false;
#endif
return 0;
}
EXPORT_SYMBOL(snd_sof_prepare);
void snd_sof_complete(struct device *dev)
{
struct snd_sof_dev *sdev = dev_get_drvdata(dev);
sdev->s0_suspend = false;
}
EXPORT_SYMBOL(snd_sof_complete);
|
