1 | // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) |
2 | // Copyright(c) 2015-18 Intel Corporation. |
3 | |
4 | /* |
5 | * stream.c - SoundWire Bus stream operations. |
6 | */ |
7 | |
8 | #include <linux/delay.h> |
9 | #include <linux/device.h> |
10 | #include <linux/init.h> |
11 | #include <linux/module.h> |
12 | #include <linux/mod_devicetable.h> |
13 | #include <linux/slab.h> |
14 | #include <linux/soundwire/sdw_registers.h> |
15 | #include <linux/soundwire/sdw.h> |
16 | #include <linux/soundwire/sdw_type.h> |
17 | #include <sound/soc.h> |
18 | #include "bus.h" |
19 | |
20 | /* |
21 | * Array of supported rows and columns as per MIPI SoundWire Specification 1.1 |
22 | * |
23 | * The rows are arranged as per the array index value programmed |
24 | * in register. The index 15 has dummy value 0 in order to fill hole. |
25 | */ |
26 | int sdw_rows[SDW_FRAME_ROWS] = {48, 50, 60, 64, 75, 80, 125, 147, |
27 | 96, 100, 120, 128, 150, 160, 250, 0, |
28 | 192, 200, 240, 256, 72, 144, 90, 180}; |
29 | EXPORT_SYMBOL(sdw_rows); |
30 | |
31 | int sdw_cols[SDW_FRAME_COLS] = {2, 4, 6, 8, 10, 12, 14, 16}; |
32 | EXPORT_SYMBOL(sdw_cols); |
33 | |
34 | int sdw_find_col_index(int col) |
35 | { |
36 | int i; |
37 | |
38 | for (i = 0; i < SDW_FRAME_COLS; i++) { |
39 | if (sdw_cols[i] == col) |
40 | return i; |
41 | } |
42 | |
43 | pr_warn("Requested column not found, selecting lowest column no: 2\n" ); |
44 | return 0; |
45 | } |
46 | EXPORT_SYMBOL(sdw_find_col_index); |
47 | |
48 | int sdw_find_row_index(int row) |
49 | { |
50 | int i; |
51 | |
52 | for (i = 0; i < SDW_FRAME_ROWS; i++) { |
53 | if (sdw_rows[i] == row) |
54 | return i; |
55 | } |
56 | |
57 | pr_warn("Requested row not found, selecting lowest row no: 48\n" ); |
58 | return 0; |
59 | } |
60 | EXPORT_SYMBOL(sdw_find_row_index); |
61 | |
62 | static int _sdw_program_slave_port_params(struct sdw_bus *bus, |
63 | struct sdw_slave *slave, |
64 | struct sdw_transport_params *t_params, |
65 | enum sdw_dpn_type type) |
66 | { |
67 | u32 addr1, addr2, addr3, addr4; |
68 | int ret; |
69 | u16 wbuf; |
70 | |
71 | if (bus->params.next_bank) { |
72 | addr1 = SDW_DPN_OFFSETCTRL2_B1(t_params->port_num); |
73 | addr2 = SDW_DPN_BLOCKCTRL3_B1(t_params->port_num); |
74 | addr3 = SDW_DPN_SAMPLECTRL2_B1(t_params->port_num); |
75 | addr4 = SDW_DPN_HCTRL_B1(t_params->port_num); |
76 | } else { |
77 | addr1 = SDW_DPN_OFFSETCTRL2_B0(t_params->port_num); |
78 | addr2 = SDW_DPN_BLOCKCTRL3_B0(t_params->port_num); |
79 | addr3 = SDW_DPN_SAMPLECTRL2_B0(t_params->port_num); |
80 | addr4 = SDW_DPN_HCTRL_B0(t_params->port_num); |
81 | } |
82 | |
83 | /* Program DPN_OffsetCtrl2 registers */ |
84 | ret = sdw_write_no_pm(slave, addr: addr1, value: t_params->offset2); |
85 | if (ret < 0) { |
86 | dev_err(bus->dev, "DPN_OffsetCtrl2 register write failed\n" ); |
87 | return ret; |
88 | } |
89 | |
90 | /* Program DPN_BlockCtrl3 register */ |
91 | ret = sdw_write_no_pm(slave, addr: addr2, value: t_params->blk_pkg_mode); |
92 | if (ret < 0) { |
93 | dev_err(bus->dev, "DPN_BlockCtrl3 register write failed\n" ); |
94 | return ret; |
95 | } |
96 | |
97 | /* |
98 | * Data ports are FULL, SIMPLE and REDUCED. This function handles |
99 | * FULL and REDUCED only and beyond this point only FULL is |
100 | * handled, so bail out if we are not FULL data port type |
101 | */ |
102 | if (type != SDW_DPN_FULL) |
103 | return ret; |
104 | |
105 | /* Program DPN_SampleCtrl2 register */ |
106 | wbuf = FIELD_GET(SDW_DPN_SAMPLECTRL_HIGH, t_params->sample_interval - 1); |
107 | |
108 | ret = sdw_write_no_pm(slave, addr: addr3, value: wbuf); |
109 | if (ret < 0) { |
110 | dev_err(bus->dev, "DPN_SampleCtrl2 register write failed\n" ); |
111 | return ret; |
112 | } |
113 | |
114 | /* Program DPN_HCtrl register */ |
115 | wbuf = FIELD_PREP(SDW_DPN_HCTRL_HSTART, t_params->hstart); |
116 | wbuf |= FIELD_PREP(SDW_DPN_HCTRL_HSTOP, t_params->hstop); |
117 | |
118 | ret = sdw_write_no_pm(slave, addr: addr4, value: wbuf); |
119 | if (ret < 0) |
120 | dev_err(bus->dev, "DPN_HCtrl register write failed\n" ); |
121 | |
122 | return ret; |
123 | } |
124 | |
125 | static int sdw_program_slave_port_params(struct sdw_bus *bus, |
126 | struct sdw_slave_runtime *s_rt, |
127 | struct sdw_port_runtime *p_rt) |
128 | { |
129 | struct sdw_transport_params *t_params = &p_rt->transport_params; |
130 | struct sdw_port_params *p_params = &p_rt->port_params; |
131 | struct sdw_slave_prop *slave_prop = &s_rt->slave->prop; |
132 | u32 addr1, addr2, addr3, addr4, addr5, addr6; |
133 | struct sdw_dpn_prop *dpn_prop; |
134 | int ret; |
135 | u8 wbuf; |
136 | |
137 | if (s_rt->slave->is_mockup_device) |
138 | return 0; |
139 | |
140 | dpn_prop = sdw_get_slave_dpn_prop(slave: s_rt->slave, |
141 | direction: s_rt->direction, |
142 | port_num: t_params->port_num); |
143 | if (!dpn_prop) |
144 | return -EINVAL; |
145 | |
146 | addr1 = SDW_DPN_PORTCTRL(t_params->port_num); |
147 | addr2 = SDW_DPN_BLOCKCTRL1(t_params->port_num); |
148 | |
149 | if (bus->params.next_bank) { |
150 | addr3 = SDW_DPN_SAMPLECTRL1_B1(t_params->port_num); |
151 | addr4 = SDW_DPN_OFFSETCTRL1_B1(t_params->port_num); |
152 | addr5 = SDW_DPN_BLOCKCTRL2_B1(t_params->port_num); |
153 | addr6 = SDW_DPN_LANECTRL_B1(t_params->port_num); |
154 | |
155 | } else { |
156 | addr3 = SDW_DPN_SAMPLECTRL1_B0(t_params->port_num); |
157 | addr4 = SDW_DPN_OFFSETCTRL1_B0(t_params->port_num); |
158 | addr5 = SDW_DPN_BLOCKCTRL2_B0(t_params->port_num); |
159 | addr6 = SDW_DPN_LANECTRL_B0(t_params->port_num); |
160 | } |
161 | |
162 | /* Program DPN_PortCtrl register */ |
163 | wbuf = FIELD_PREP(SDW_DPN_PORTCTRL_DATAMODE, p_params->data_mode); |
164 | wbuf |= FIELD_PREP(SDW_DPN_PORTCTRL_FLOWMODE, p_params->flow_mode); |
165 | |
166 | ret = sdw_update_no_pm(slave: s_rt->slave, addr: addr1, mask: 0xF, val: wbuf); |
167 | if (ret < 0) { |
168 | dev_err(&s_rt->slave->dev, |
169 | "DPN_PortCtrl register write failed for port %d\n" , |
170 | t_params->port_num); |
171 | return ret; |
172 | } |
173 | |
174 | if (!dpn_prop->read_only_wordlength) { |
175 | /* Program DPN_BlockCtrl1 register */ |
176 | ret = sdw_write_no_pm(slave: s_rt->slave, addr: addr2, value: (p_params->bps - 1)); |
177 | if (ret < 0) { |
178 | dev_err(&s_rt->slave->dev, |
179 | "DPN_BlockCtrl1 register write failed for port %d\n" , |
180 | t_params->port_num); |
181 | return ret; |
182 | } |
183 | } |
184 | |
185 | /* Program DPN_SampleCtrl1 register */ |
186 | wbuf = (t_params->sample_interval - 1) & SDW_DPN_SAMPLECTRL_LOW; |
187 | ret = sdw_write_no_pm(slave: s_rt->slave, addr: addr3, value: wbuf); |
188 | if (ret < 0) { |
189 | dev_err(&s_rt->slave->dev, |
190 | "DPN_SampleCtrl1 register write failed for port %d\n" , |
191 | t_params->port_num); |
192 | return ret; |
193 | } |
194 | |
195 | /* Program DPN_OffsetCtrl1 registers */ |
196 | ret = sdw_write_no_pm(slave: s_rt->slave, addr: addr4, value: t_params->offset1); |
197 | if (ret < 0) { |
198 | dev_err(&s_rt->slave->dev, |
199 | "DPN_OffsetCtrl1 register write failed for port %d\n" , |
200 | t_params->port_num); |
201 | return ret; |
202 | } |
203 | |
204 | /* Program DPN_BlockCtrl2 register*/ |
205 | if (t_params->blk_grp_ctrl_valid) { |
206 | ret = sdw_write_no_pm(slave: s_rt->slave, addr: addr5, value: t_params->blk_grp_ctrl); |
207 | if (ret < 0) { |
208 | dev_err(&s_rt->slave->dev, |
209 | "DPN_BlockCtrl2 reg write failed for port %d\n" , |
210 | t_params->port_num); |
211 | return ret; |
212 | } |
213 | } |
214 | |
215 | /* program DPN_LaneCtrl register */ |
216 | if (slave_prop->lane_control_support) { |
217 | ret = sdw_write_no_pm(slave: s_rt->slave, addr: addr6, value: t_params->lane_ctrl); |
218 | if (ret < 0) { |
219 | dev_err(&s_rt->slave->dev, |
220 | "DPN_LaneCtrl register write failed for port %d\n" , |
221 | t_params->port_num); |
222 | return ret; |
223 | } |
224 | } |
225 | |
226 | if (dpn_prop->type != SDW_DPN_SIMPLE) { |
227 | ret = _sdw_program_slave_port_params(bus, slave: s_rt->slave, |
228 | t_params, type: dpn_prop->type); |
229 | if (ret < 0) |
230 | dev_err(&s_rt->slave->dev, |
231 | "Transport reg write failed for port: %d\n" , |
232 | t_params->port_num); |
233 | } |
234 | |
235 | return ret; |
236 | } |
237 | |
238 | static int sdw_program_master_port_params(struct sdw_bus *bus, |
239 | struct sdw_port_runtime *p_rt) |
240 | { |
241 | int ret; |
242 | |
243 | /* |
244 | * we need to set transport and port parameters for the port. |
245 | * Transport parameters refers to the sample interval, offsets and |
246 | * hstart/stop etc of the data. Port parameters refers to word |
247 | * length, flow mode etc of the port |
248 | */ |
249 | ret = bus->port_ops->dpn_set_port_transport_params(bus, |
250 | &p_rt->transport_params, |
251 | bus->params.next_bank); |
252 | if (ret < 0) |
253 | return ret; |
254 | |
255 | return bus->port_ops->dpn_set_port_params(bus, |
256 | &p_rt->port_params, |
257 | bus->params.next_bank); |
258 | } |
259 | |
260 | /** |
261 | * sdw_program_port_params() - Programs transport parameters of Master(s) |
262 | * and Slave(s) |
263 | * |
264 | * @m_rt: Master stream runtime |
265 | */ |
266 | static int sdw_program_port_params(struct sdw_master_runtime *m_rt) |
267 | { |
268 | struct sdw_slave_runtime *s_rt; |
269 | struct sdw_bus *bus = m_rt->bus; |
270 | struct sdw_port_runtime *p_rt; |
271 | int ret = 0; |
272 | |
273 | /* Program transport & port parameters for Slave(s) */ |
274 | list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { |
275 | list_for_each_entry(p_rt, &s_rt->port_list, port_node) { |
276 | ret = sdw_program_slave_port_params(bus, s_rt, p_rt); |
277 | if (ret < 0) |
278 | return ret; |
279 | } |
280 | } |
281 | |
282 | /* Program transport & port parameters for Master(s) */ |
283 | list_for_each_entry(p_rt, &m_rt->port_list, port_node) { |
284 | ret = sdw_program_master_port_params(bus, p_rt); |
285 | if (ret < 0) |
286 | return ret; |
287 | } |
288 | |
289 | return 0; |
290 | } |
291 | |
292 | /** |
293 | * sdw_enable_disable_slave_ports: Enable/disable slave data port |
294 | * |
295 | * @bus: bus instance |
296 | * @s_rt: slave runtime |
297 | * @p_rt: port runtime |
298 | * @en: enable or disable operation |
299 | * |
300 | * This function only sets the enable/disable bits in the relevant bank, the |
301 | * actual enable/disable is done with a bank switch |
302 | */ |
303 | static int sdw_enable_disable_slave_ports(struct sdw_bus *bus, |
304 | struct sdw_slave_runtime *s_rt, |
305 | struct sdw_port_runtime *p_rt, |
306 | bool en) |
307 | { |
308 | struct sdw_transport_params *t_params = &p_rt->transport_params; |
309 | u32 addr; |
310 | int ret; |
311 | |
312 | if (bus->params.next_bank) |
313 | addr = SDW_DPN_CHANNELEN_B1(p_rt->num); |
314 | else |
315 | addr = SDW_DPN_CHANNELEN_B0(p_rt->num); |
316 | |
317 | /* |
318 | * Since bus doesn't support sharing a port across two streams, |
319 | * it is safe to reset this register |
320 | */ |
321 | if (en) |
322 | ret = sdw_write_no_pm(slave: s_rt->slave, addr, value: p_rt->ch_mask); |
323 | else |
324 | ret = sdw_write_no_pm(slave: s_rt->slave, addr, value: 0x0); |
325 | |
326 | if (ret < 0) |
327 | dev_err(&s_rt->slave->dev, |
328 | "Slave chn_en reg write failed:%d port:%d\n" , |
329 | ret, t_params->port_num); |
330 | |
331 | return ret; |
332 | } |
333 | |
334 | static int sdw_enable_disable_master_ports(struct sdw_master_runtime *m_rt, |
335 | struct sdw_port_runtime *p_rt, |
336 | bool en) |
337 | { |
338 | struct sdw_transport_params *t_params = &p_rt->transport_params; |
339 | struct sdw_bus *bus = m_rt->bus; |
340 | struct sdw_enable_ch enable_ch; |
341 | int ret; |
342 | |
343 | enable_ch.port_num = p_rt->num; |
344 | enable_ch.ch_mask = p_rt->ch_mask; |
345 | enable_ch.enable = en; |
346 | |
347 | /* Perform Master port channel(s) enable/disable */ |
348 | if (bus->port_ops->dpn_port_enable_ch) { |
349 | ret = bus->port_ops->dpn_port_enable_ch(bus, |
350 | &enable_ch, |
351 | bus->params.next_bank); |
352 | if (ret < 0) { |
353 | dev_err(bus->dev, |
354 | "Master chn_en write failed:%d port:%d\n" , |
355 | ret, t_params->port_num); |
356 | return ret; |
357 | } |
358 | } else { |
359 | dev_err(bus->dev, |
360 | "dpn_port_enable_ch not supported, %s failed\n" , |
361 | en ? "enable" : "disable" ); |
362 | return -EINVAL; |
363 | } |
364 | |
365 | return 0; |
366 | } |
367 | |
368 | /** |
369 | * sdw_enable_disable_ports() - Enable/disable port(s) for Master and |
370 | * Slave(s) |
371 | * |
372 | * @m_rt: Master stream runtime |
373 | * @en: mode (enable/disable) |
374 | */ |
375 | static int sdw_enable_disable_ports(struct sdw_master_runtime *m_rt, bool en) |
376 | { |
377 | struct sdw_port_runtime *s_port, *m_port; |
378 | struct sdw_slave_runtime *s_rt; |
379 | int ret = 0; |
380 | |
381 | /* Enable/Disable Slave port(s) */ |
382 | list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { |
383 | list_for_each_entry(s_port, &s_rt->port_list, port_node) { |
384 | ret = sdw_enable_disable_slave_ports(bus: m_rt->bus, s_rt, |
385 | p_rt: s_port, en); |
386 | if (ret < 0) |
387 | return ret; |
388 | } |
389 | } |
390 | |
391 | /* Enable/Disable Master port(s) */ |
392 | list_for_each_entry(m_port, &m_rt->port_list, port_node) { |
393 | ret = sdw_enable_disable_master_ports(m_rt, p_rt: m_port, en); |
394 | if (ret < 0) |
395 | return ret; |
396 | } |
397 | |
398 | return 0; |
399 | } |
400 | |
401 | static int sdw_do_port_prep(struct sdw_slave_runtime *s_rt, |
402 | struct sdw_prepare_ch prep_ch, |
403 | enum sdw_port_prep_ops cmd) |
404 | { |
405 | int ret = 0; |
406 | struct sdw_slave *slave = s_rt->slave; |
407 | |
408 | mutex_lock(&slave->sdw_dev_lock); |
409 | |
410 | if (slave->probed) { |
411 | struct device *dev = &slave->dev; |
412 | struct sdw_driver *drv = drv_to_sdw_driver(dev->driver); |
413 | |
414 | if (drv->ops && drv->ops->port_prep) { |
415 | ret = drv->ops->port_prep(slave, &prep_ch, cmd); |
416 | if (ret < 0) |
417 | dev_err(dev, "Slave Port Prep cmd %d failed: %d\n" , |
418 | cmd, ret); |
419 | } |
420 | } |
421 | |
422 | mutex_unlock(lock: &slave->sdw_dev_lock); |
423 | |
424 | return ret; |
425 | } |
426 | |
427 | static int sdw_prep_deprep_slave_ports(struct sdw_bus *bus, |
428 | struct sdw_slave_runtime *s_rt, |
429 | struct sdw_port_runtime *p_rt, |
430 | bool prep) |
431 | { |
432 | struct completion *port_ready; |
433 | struct sdw_dpn_prop *dpn_prop; |
434 | struct sdw_prepare_ch prep_ch; |
435 | bool intr = false; |
436 | int ret = 0, val; |
437 | u32 addr; |
438 | |
439 | prep_ch.num = p_rt->num; |
440 | prep_ch.ch_mask = p_rt->ch_mask; |
441 | |
442 | dpn_prop = sdw_get_slave_dpn_prop(slave: s_rt->slave, |
443 | direction: s_rt->direction, |
444 | port_num: prep_ch.num); |
445 | if (!dpn_prop) { |
446 | dev_err(bus->dev, |
447 | "Slave Port:%d properties not found\n" , prep_ch.num); |
448 | return -EINVAL; |
449 | } |
450 | |
451 | prep_ch.prepare = prep; |
452 | |
453 | prep_ch.bank = bus->params.next_bank; |
454 | |
455 | if (dpn_prop->imp_def_interrupts || !dpn_prop->simple_ch_prep_sm || |
456 | bus->params.s_data_mode != SDW_PORT_DATA_MODE_NORMAL) |
457 | intr = true; |
458 | |
459 | /* |
460 | * Enable interrupt before Port prepare. |
461 | * For Port de-prepare, it is assumed that port |
462 | * was prepared earlier |
463 | */ |
464 | if (prep && intr) { |
465 | ret = sdw_configure_dpn_intr(slave: s_rt->slave, port: p_rt->num, enable: prep, |
466 | mask: dpn_prop->imp_def_interrupts); |
467 | if (ret < 0) |
468 | return ret; |
469 | } |
470 | |
471 | /* Inform slave about the impending port prepare */ |
472 | sdw_do_port_prep(s_rt, prep_ch, cmd: prep ? SDW_OPS_PORT_PRE_PREP : SDW_OPS_PORT_PRE_DEPREP); |
473 | |
474 | /* Prepare Slave port implementing CP_SM */ |
475 | if (!dpn_prop->simple_ch_prep_sm) { |
476 | addr = SDW_DPN_PREPARECTRL(p_rt->num); |
477 | |
478 | if (prep) |
479 | ret = sdw_write_no_pm(slave: s_rt->slave, addr, value: p_rt->ch_mask); |
480 | else |
481 | ret = sdw_write_no_pm(slave: s_rt->slave, addr, value: 0x0); |
482 | |
483 | if (ret < 0) { |
484 | dev_err(&s_rt->slave->dev, |
485 | "Slave prep_ctrl reg write failed\n" ); |
486 | return ret; |
487 | } |
488 | |
489 | /* Wait for completion on port ready */ |
490 | port_ready = &s_rt->slave->port_ready[prep_ch.num]; |
491 | wait_for_completion_timeout(x: port_ready, |
492 | timeout: msecs_to_jiffies(m: dpn_prop->ch_prep_timeout)); |
493 | |
494 | val = sdw_read_no_pm(slave: s_rt->slave, SDW_DPN_PREPARESTATUS(p_rt->num)); |
495 | if ((val < 0) || (val & p_rt->ch_mask)) { |
496 | ret = (val < 0) ? val : -ETIMEDOUT; |
497 | dev_err(&s_rt->slave->dev, |
498 | "Chn prep failed for port %d: %d\n" , prep_ch.num, ret); |
499 | return ret; |
500 | } |
501 | } |
502 | |
503 | /* Inform slaves about ports prepared */ |
504 | sdw_do_port_prep(s_rt, prep_ch, cmd: prep ? SDW_OPS_PORT_POST_PREP : SDW_OPS_PORT_POST_DEPREP); |
505 | |
506 | /* Disable interrupt after Port de-prepare */ |
507 | if (!prep && intr) |
508 | ret = sdw_configure_dpn_intr(slave: s_rt->slave, port: p_rt->num, enable: prep, |
509 | mask: dpn_prop->imp_def_interrupts); |
510 | |
511 | return ret; |
512 | } |
513 | |
514 | static int sdw_prep_deprep_master_ports(struct sdw_master_runtime *m_rt, |
515 | struct sdw_port_runtime *p_rt, |
516 | bool prep) |
517 | { |
518 | struct sdw_transport_params *t_params = &p_rt->transport_params; |
519 | struct sdw_bus *bus = m_rt->bus; |
520 | const struct sdw_master_port_ops *ops = bus->port_ops; |
521 | struct sdw_prepare_ch prep_ch; |
522 | int ret = 0; |
523 | |
524 | prep_ch.num = p_rt->num; |
525 | prep_ch.ch_mask = p_rt->ch_mask; |
526 | prep_ch.prepare = prep; /* Prepare/De-prepare */ |
527 | prep_ch.bank = bus->params.next_bank; |
528 | |
529 | /* Pre-prepare/Pre-deprepare port(s) */ |
530 | if (ops->dpn_port_prep) { |
531 | ret = ops->dpn_port_prep(bus, &prep_ch); |
532 | if (ret < 0) { |
533 | dev_err(bus->dev, "Port prepare failed for port:%d\n" , |
534 | t_params->port_num); |
535 | return ret; |
536 | } |
537 | } |
538 | |
539 | return ret; |
540 | } |
541 | |
542 | /** |
543 | * sdw_prep_deprep_ports() - Prepare/De-prepare port(s) for Master(s) and |
544 | * Slave(s) |
545 | * |
546 | * @m_rt: Master runtime handle |
547 | * @prep: Prepare or De-prepare |
548 | */ |
549 | static int sdw_prep_deprep_ports(struct sdw_master_runtime *m_rt, bool prep) |
550 | { |
551 | struct sdw_slave_runtime *s_rt; |
552 | struct sdw_port_runtime *p_rt; |
553 | int ret = 0; |
554 | |
555 | /* Prepare/De-prepare Slave port(s) */ |
556 | list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { |
557 | list_for_each_entry(p_rt, &s_rt->port_list, port_node) { |
558 | ret = sdw_prep_deprep_slave_ports(bus: m_rt->bus, s_rt, |
559 | p_rt, prep); |
560 | if (ret < 0) |
561 | return ret; |
562 | } |
563 | } |
564 | |
565 | /* Prepare/De-prepare Master port(s) */ |
566 | list_for_each_entry(p_rt, &m_rt->port_list, port_node) { |
567 | ret = sdw_prep_deprep_master_ports(m_rt, p_rt, prep); |
568 | if (ret < 0) |
569 | return ret; |
570 | } |
571 | |
572 | return ret; |
573 | } |
574 | |
575 | /** |
576 | * sdw_notify_config() - Notify bus configuration |
577 | * |
578 | * @m_rt: Master runtime handle |
579 | * |
580 | * This function notifies the Master(s) and Slave(s) of the |
581 | * new bus configuration. |
582 | */ |
583 | static int sdw_notify_config(struct sdw_master_runtime *m_rt) |
584 | { |
585 | struct sdw_slave_runtime *s_rt; |
586 | struct sdw_bus *bus = m_rt->bus; |
587 | struct sdw_slave *slave; |
588 | int ret; |
589 | |
590 | if (bus->ops->set_bus_conf) { |
591 | ret = bus->ops->set_bus_conf(bus, &bus->params); |
592 | if (ret < 0) |
593 | return ret; |
594 | } |
595 | |
596 | list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { |
597 | slave = s_rt->slave; |
598 | |
599 | mutex_lock(&slave->sdw_dev_lock); |
600 | |
601 | if (slave->probed) { |
602 | struct device *dev = &slave->dev; |
603 | struct sdw_driver *drv = drv_to_sdw_driver(dev->driver); |
604 | |
605 | if (drv->ops && drv->ops->bus_config) { |
606 | ret = drv->ops->bus_config(slave, &bus->params); |
607 | if (ret < 0) { |
608 | dev_err(dev, "Notify Slave: %d failed\n" , |
609 | slave->dev_num); |
610 | mutex_unlock(lock: &slave->sdw_dev_lock); |
611 | return ret; |
612 | } |
613 | } |
614 | } |
615 | |
616 | mutex_unlock(lock: &slave->sdw_dev_lock); |
617 | } |
618 | |
619 | return 0; |
620 | } |
621 | |
622 | /** |
623 | * sdw_program_params() - Program transport and port parameters for Master(s) |
624 | * and Slave(s) |
625 | * |
626 | * @bus: SDW bus instance |
627 | * @prepare: true if sdw_program_params() is called by _prepare. |
628 | */ |
629 | static int sdw_program_params(struct sdw_bus *bus, bool prepare) |
630 | { |
631 | struct sdw_master_runtime *m_rt; |
632 | int ret = 0; |
633 | |
634 | list_for_each_entry(m_rt, &bus->m_rt_list, bus_node) { |
635 | |
636 | /* |
637 | * this loop walks through all master runtimes for a |
638 | * bus, but the ports can only be configured while |
639 | * explicitly preparing a stream or handling an |
640 | * already-prepared stream otherwise. |
641 | */ |
642 | if (!prepare && |
643 | m_rt->stream->state == SDW_STREAM_CONFIGURED) |
644 | continue; |
645 | |
646 | ret = sdw_program_port_params(m_rt); |
647 | if (ret < 0) { |
648 | dev_err(bus->dev, |
649 | "Program transport params failed: %d\n" , ret); |
650 | return ret; |
651 | } |
652 | |
653 | ret = sdw_notify_config(m_rt); |
654 | if (ret < 0) { |
655 | dev_err(bus->dev, |
656 | "Notify bus config failed: %d\n" , ret); |
657 | return ret; |
658 | } |
659 | |
660 | /* Enable port(s) on alternate bank for all active streams */ |
661 | if (m_rt->stream->state != SDW_STREAM_ENABLED) |
662 | continue; |
663 | |
664 | ret = sdw_enable_disable_ports(m_rt, en: true); |
665 | if (ret < 0) { |
666 | dev_err(bus->dev, "Enable channel failed: %d\n" , ret); |
667 | return ret; |
668 | } |
669 | } |
670 | |
671 | return ret; |
672 | } |
673 | |
674 | static int sdw_bank_switch(struct sdw_bus *bus, int m_rt_count) |
675 | { |
676 | int col_index, row_index; |
677 | bool multi_link; |
678 | struct sdw_msg *wr_msg; |
679 | u8 *wbuf; |
680 | int ret; |
681 | u16 addr; |
682 | |
683 | wr_msg = kzalloc(size: sizeof(*wr_msg), GFP_KERNEL); |
684 | if (!wr_msg) |
685 | return -ENOMEM; |
686 | |
687 | wbuf = kzalloc(size: sizeof(*wbuf), GFP_KERNEL); |
688 | if (!wbuf) { |
689 | ret = -ENOMEM; |
690 | goto error_1; |
691 | } |
692 | |
693 | /* Get row and column index to program register */ |
694 | col_index = sdw_find_col_index(bus->params.col); |
695 | row_index = sdw_find_row_index(bus->params.row); |
696 | wbuf[0] = col_index | (row_index << 3); |
697 | |
698 | if (bus->params.next_bank) |
699 | addr = SDW_SCP_FRAMECTRL_B1; |
700 | else |
701 | addr = SDW_SCP_FRAMECTRL_B0; |
702 | |
703 | sdw_fill_msg(msg: wr_msg, NULL, addr, count: 1, SDW_BROADCAST_DEV_NUM, |
704 | flags: SDW_MSG_FLAG_WRITE, buf: wbuf); |
705 | wr_msg->ssp_sync = true; |
706 | |
707 | /* |
708 | * Set the multi_link flag only when both the hardware supports |
709 | * and hardware-based sync is required |
710 | */ |
711 | multi_link = bus->multi_link && (m_rt_count >= bus->hw_sync_min_links); |
712 | |
713 | if (multi_link) |
714 | ret = sdw_transfer_defer(bus, msg: wr_msg); |
715 | else |
716 | ret = sdw_transfer(bus, msg: wr_msg); |
717 | |
718 | if (ret < 0 && ret != -ENODATA) { |
719 | dev_err(bus->dev, "Slave frame_ctrl reg write failed\n" ); |
720 | goto error; |
721 | } |
722 | |
723 | if (!multi_link) { |
724 | kfree(objp: wbuf); |
725 | kfree(objp: wr_msg); |
726 | bus->defer_msg.msg = NULL; |
727 | bus->params.curr_bank = !bus->params.curr_bank; |
728 | bus->params.next_bank = !bus->params.next_bank; |
729 | } |
730 | |
731 | return 0; |
732 | |
733 | error: |
734 | kfree(objp: wbuf); |
735 | error_1: |
736 | kfree(objp: wr_msg); |
737 | bus->defer_msg.msg = NULL; |
738 | return ret; |
739 | } |
740 | |
741 | /** |
742 | * sdw_ml_sync_bank_switch: Multilink register bank switch |
743 | * |
744 | * @bus: SDW bus instance |
745 | * |
746 | * Caller function should free the buffers on error |
747 | */ |
748 | static int sdw_ml_sync_bank_switch(struct sdw_bus *bus) |
749 | { |
750 | unsigned long time_left; |
751 | |
752 | if (!bus->multi_link) |
753 | return 0; |
754 | |
755 | /* Wait for completion of transfer */ |
756 | time_left = wait_for_completion_timeout(x: &bus->defer_msg.complete, |
757 | timeout: bus->bank_switch_timeout); |
758 | |
759 | if (!time_left) { |
760 | dev_err(bus->dev, "Controller Timed out on bank switch\n" ); |
761 | return -ETIMEDOUT; |
762 | } |
763 | |
764 | bus->params.curr_bank = !bus->params.curr_bank; |
765 | bus->params.next_bank = !bus->params.next_bank; |
766 | |
767 | if (bus->defer_msg.msg) { |
768 | kfree(objp: bus->defer_msg.msg->buf); |
769 | kfree(objp: bus->defer_msg.msg); |
770 | bus->defer_msg.msg = NULL; |
771 | } |
772 | |
773 | return 0; |
774 | } |
775 | |
776 | static int do_bank_switch(struct sdw_stream_runtime *stream) |
777 | { |
778 | struct sdw_master_runtime *m_rt; |
779 | const struct sdw_master_ops *ops; |
780 | struct sdw_bus *bus; |
781 | bool multi_link = false; |
782 | int m_rt_count; |
783 | int ret = 0; |
784 | |
785 | m_rt_count = stream->m_rt_count; |
786 | |
787 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
788 | bus = m_rt->bus; |
789 | ops = bus->ops; |
790 | |
791 | if (bus->multi_link && m_rt_count >= bus->hw_sync_min_links) { |
792 | multi_link = true; |
793 | mutex_lock(&bus->msg_lock); |
794 | } |
795 | |
796 | /* Pre-bank switch */ |
797 | if (ops->pre_bank_switch) { |
798 | ret = ops->pre_bank_switch(bus); |
799 | if (ret < 0) { |
800 | dev_err(bus->dev, |
801 | "Pre bank switch op failed: %d\n" , ret); |
802 | goto msg_unlock; |
803 | } |
804 | } |
805 | |
806 | /* |
807 | * Perform Bank switch operation. |
808 | * For multi link cases, the actual bank switch is |
809 | * synchronized across all Masters and happens later as a |
810 | * part of post_bank_switch ops. |
811 | */ |
812 | ret = sdw_bank_switch(bus, m_rt_count); |
813 | if (ret < 0) { |
814 | dev_err(bus->dev, "Bank switch failed: %d\n" , ret); |
815 | goto error; |
816 | } |
817 | } |
818 | |
819 | /* |
820 | * For multi link cases, it is expected that the bank switch is |
821 | * triggered by the post_bank_switch for the first Master in the list |
822 | * and for the other Masters the post_bank_switch() should return doing |
823 | * nothing. |
824 | */ |
825 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
826 | bus = m_rt->bus; |
827 | ops = bus->ops; |
828 | |
829 | /* Post-bank switch */ |
830 | if (ops->post_bank_switch) { |
831 | ret = ops->post_bank_switch(bus); |
832 | if (ret < 0) { |
833 | dev_err(bus->dev, |
834 | "Post bank switch op failed: %d\n" , |
835 | ret); |
836 | goto error; |
837 | } |
838 | } else if (multi_link) { |
839 | dev_err(bus->dev, |
840 | "Post bank switch ops not implemented\n" ); |
841 | ret = -EINVAL; |
842 | goto error; |
843 | } |
844 | |
845 | /* Set the bank switch timeout to default, if not set */ |
846 | if (!bus->bank_switch_timeout) |
847 | bus->bank_switch_timeout = DEFAULT_BANK_SWITCH_TIMEOUT; |
848 | |
849 | /* Check if bank switch was successful */ |
850 | ret = sdw_ml_sync_bank_switch(bus); |
851 | if (ret < 0) { |
852 | dev_err(bus->dev, |
853 | "multi link bank switch failed: %d\n" , ret); |
854 | goto error; |
855 | } |
856 | |
857 | if (multi_link) |
858 | mutex_unlock(lock: &bus->msg_lock); |
859 | } |
860 | |
861 | return ret; |
862 | |
863 | error: |
864 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
865 | bus = m_rt->bus; |
866 | if (bus->defer_msg.msg) { |
867 | kfree(objp: bus->defer_msg.msg->buf); |
868 | kfree(objp: bus->defer_msg.msg); |
869 | bus->defer_msg.msg = NULL; |
870 | } |
871 | } |
872 | |
873 | msg_unlock: |
874 | |
875 | if (multi_link) { |
876 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
877 | bus = m_rt->bus; |
878 | if (mutex_is_locked(lock: &bus->msg_lock)) |
879 | mutex_unlock(lock: &bus->msg_lock); |
880 | } |
881 | } |
882 | |
883 | return ret; |
884 | } |
885 | |
886 | static struct sdw_port_runtime *sdw_port_alloc(struct list_head *port_list) |
887 | { |
888 | struct sdw_port_runtime *p_rt; |
889 | |
890 | p_rt = kzalloc(size: sizeof(*p_rt), GFP_KERNEL); |
891 | if (!p_rt) |
892 | return NULL; |
893 | |
894 | list_add_tail(new: &p_rt->port_node, head: port_list); |
895 | |
896 | return p_rt; |
897 | } |
898 | |
899 | static int sdw_port_config(struct sdw_port_runtime *p_rt, |
900 | struct sdw_port_config *port_config, |
901 | int port_index) |
902 | { |
903 | p_rt->ch_mask = port_config[port_index].ch_mask; |
904 | p_rt->num = port_config[port_index].num; |
905 | |
906 | /* |
907 | * TODO: Check port capabilities for requested configuration |
908 | */ |
909 | |
910 | return 0; |
911 | } |
912 | |
913 | static void sdw_port_free(struct sdw_port_runtime *p_rt) |
914 | { |
915 | list_del(entry: &p_rt->port_node); |
916 | kfree(objp: p_rt); |
917 | } |
918 | |
919 | static bool sdw_slave_port_allocated(struct sdw_slave_runtime *s_rt) |
920 | { |
921 | return !list_empty(head: &s_rt->port_list); |
922 | } |
923 | |
924 | static void sdw_slave_port_free(struct sdw_slave *slave, |
925 | struct sdw_stream_runtime *stream) |
926 | { |
927 | struct sdw_port_runtime *p_rt, *_p_rt; |
928 | struct sdw_master_runtime *m_rt; |
929 | struct sdw_slave_runtime *s_rt; |
930 | |
931 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
932 | list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { |
933 | if (s_rt->slave != slave) |
934 | continue; |
935 | |
936 | list_for_each_entry_safe(p_rt, _p_rt, |
937 | &s_rt->port_list, port_node) { |
938 | sdw_port_free(p_rt); |
939 | } |
940 | } |
941 | } |
942 | } |
943 | |
944 | static int sdw_slave_port_alloc(struct sdw_slave *slave, |
945 | struct sdw_slave_runtime *s_rt, |
946 | unsigned int num_config) |
947 | { |
948 | struct sdw_port_runtime *p_rt; |
949 | int i; |
950 | |
951 | /* Iterate for number of ports to perform initialization */ |
952 | for (i = 0; i < num_config; i++) { |
953 | p_rt = sdw_port_alloc(port_list: &s_rt->port_list); |
954 | if (!p_rt) |
955 | return -ENOMEM; |
956 | } |
957 | |
958 | return 0; |
959 | } |
960 | |
961 | static int sdw_slave_port_is_valid_range(struct device *dev, int num) |
962 | { |
963 | if (!SDW_VALID_PORT_RANGE(num)) { |
964 | dev_err(dev, "SoundWire: Invalid port number :%d\n" , num); |
965 | return -EINVAL; |
966 | } |
967 | |
968 | return 0; |
969 | } |
970 | |
971 | static int sdw_slave_port_config(struct sdw_slave *slave, |
972 | struct sdw_slave_runtime *s_rt, |
973 | struct sdw_port_config *port_config) |
974 | { |
975 | struct sdw_port_runtime *p_rt; |
976 | int ret; |
977 | int i; |
978 | |
979 | i = 0; |
980 | list_for_each_entry(p_rt, &s_rt->port_list, port_node) { |
981 | /* |
982 | * TODO: Check valid port range as defined by DisCo/ |
983 | * slave |
984 | */ |
985 | ret = sdw_slave_port_is_valid_range(dev: &slave->dev, num: port_config[i].num); |
986 | if (ret < 0) |
987 | return ret; |
988 | |
989 | ret = sdw_port_config(p_rt, port_config, port_index: i); |
990 | if (ret < 0) |
991 | return ret; |
992 | i++; |
993 | } |
994 | |
995 | return 0; |
996 | } |
997 | |
998 | static bool sdw_master_port_allocated(struct sdw_master_runtime *m_rt) |
999 | { |
1000 | return !list_empty(head: &m_rt->port_list); |
1001 | } |
1002 | |
1003 | static void sdw_master_port_free(struct sdw_master_runtime *m_rt) |
1004 | { |
1005 | struct sdw_port_runtime *p_rt, *_p_rt; |
1006 | |
1007 | list_for_each_entry_safe(p_rt, _p_rt, &m_rt->port_list, port_node) { |
1008 | sdw_port_free(p_rt); |
1009 | } |
1010 | } |
1011 | |
1012 | static int sdw_master_port_alloc(struct sdw_master_runtime *m_rt, |
1013 | unsigned int num_ports) |
1014 | { |
1015 | struct sdw_port_runtime *p_rt; |
1016 | int i; |
1017 | |
1018 | /* Iterate for number of ports to perform initialization */ |
1019 | for (i = 0; i < num_ports; i++) { |
1020 | p_rt = sdw_port_alloc(port_list: &m_rt->port_list); |
1021 | if (!p_rt) |
1022 | return -ENOMEM; |
1023 | } |
1024 | |
1025 | return 0; |
1026 | } |
1027 | |
1028 | static int sdw_master_port_config(struct sdw_master_runtime *m_rt, |
1029 | struct sdw_port_config *port_config) |
1030 | { |
1031 | struct sdw_port_runtime *p_rt; |
1032 | int ret; |
1033 | int i; |
1034 | |
1035 | i = 0; |
1036 | list_for_each_entry(p_rt, &m_rt->port_list, port_node) { |
1037 | ret = sdw_port_config(p_rt, port_config, port_index: i); |
1038 | if (ret < 0) |
1039 | return ret; |
1040 | i++; |
1041 | } |
1042 | |
1043 | return 0; |
1044 | } |
1045 | |
1046 | /** |
1047 | * sdw_slave_rt_alloc() - Allocate a Slave runtime handle. |
1048 | * |
1049 | * @slave: Slave handle |
1050 | * @m_rt: Master runtime handle |
1051 | * |
1052 | * This function is to be called with bus_lock held. |
1053 | */ |
1054 | static struct sdw_slave_runtime |
1055 | *sdw_slave_rt_alloc(struct sdw_slave *slave, |
1056 | struct sdw_master_runtime *m_rt) |
1057 | { |
1058 | struct sdw_slave_runtime *s_rt; |
1059 | |
1060 | s_rt = kzalloc(size: sizeof(*s_rt), GFP_KERNEL); |
1061 | if (!s_rt) |
1062 | return NULL; |
1063 | |
1064 | INIT_LIST_HEAD(list: &s_rt->port_list); |
1065 | s_rt->slave = slave; |
1066 | |
1067 | list_add_tail(new: &s_rt->m_rt_node, head: &m_rt->slave_rt_list); |
1068 | |
1069 | return s_rt; |
1070 | } |
1071 | |
1072 | /** |
1073 | * sdw_slave_rt_config() - Configure a Slave runtime handle. |
1074 | * |
1075 | * @s_rt: Slave runtime handle |
1076 | * @stream_config: Stream configuration |
1077 | * |
1078 | * This function is to be called with bus_lock held. |
1079 | */ |
1080 | static int sdw_slave_rt_config(struct sdw_slave_runtime *s_rt, |
1081 | struct sdw_stream_config *stream_config) |
1082 | { |
1083 | s_rt->ch_count = stream_config->ch_count; |
1084 | s_rt->direction = stream_config->direction; |
1085 | |
1086 | return 0; |
1087 | } |
1088 | |
1089 | static struct sdw_slave_runtime *sdw_slave_rt_find(struct sdw_slave *slave, |
1090 | struct sdw_stream_runtime *stream) |
1091 | { |
1092 | struct sdw_slave_runtime *s_rt, *_s_rt; |
1093 | struct sdw_master_runtime *m_rt; |
1094 | |
1095 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
1096 | /* Retrieve Slave runtime handle */ |
1097 | list_for_each_entry_safe(s_rt, _s_rt, |
1098 | &m_rt->slave_rt_list, m_rt_node) { |
1099 | if (s_rt->slave == slave) |
1100 | return s_rt; |
1101 | } |
1102 | } |
1103 | return NULL; |
1104 | } |
1105 | |
1106 | /** |
1107 | * sdw_slave_rt_free() - Free Slave(s) runtime handle |
1108 | * |
1109 | * @slave: Slave handle. |
1110 | * @stream: Stream runtime handle. |
1111 | * |
1112 | * This function is to be called with bus_lock held. |
1113 | */ |
1114 | static void sdw_slave_rt_free(struct sdw_slave *slave, |
1115 | struct sdw_stream_runtime *stream) |
1116 | { |
1117 | struct sdw_slave_runtime *s_rt; |
1118 | |
1119 | s_rt = sdw_slave_rt_find(slave, stream); |
1120 | if (s_rt) { |
1121 | list_del(entry: &s_rt->m_rt_node); |
1122 | kfree(objp: s_rt); |
1123 | } |
1124 | } |
1125 | |
1126 | static struct sdw_master_runtime |
1127 | *sdw_master_rt_find(struct sdw_bus *bus, |
1128 | struct sdw_stream_runtime *stream) |
1129 | { |
1130 | struct sdw_master_runtime *m_rt; |
1131 | |
1132 | /* Retrieve Bus handle if already available */ |
1133 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
1134 | if (m_rt->bus == bus) |
1135 | return m_rt; |
1136 | } |
1137 | |
1138 | return NULL; |
1139 | } |
1140 | |
1141 | /** |
1142 | * sdw_master_rt_alloc() - Allocates a Master runtime handle |
1143 | * |
1144 | * @bus: SDW bus instance |
1145 | * @stream: Stream runtime handle. |
1146 | * |
1147 | * This function is to be called with bus_lock held. |
1148 | */ |
1149 | static struct sdw_master_runtime |
1150 | *sdw_master_rt_alloc(struct sdw_bus *bus, |
1151 | struct sdw_stream_runtime *stream) |
1152 | { |
1153 | struct sdw_master_runtime *m_rt, *walk_m_rt; |
1154 | struct list_head *insert_after; |
1155 | |
1156 | m_rt = kzalloc(size: sizeof(*m_rt), GFP_KERNEL); |
1157 | if (!m_rt) |
1158 | return NULL; |
1159 | |
1160 | /* Initialization of Master runtime handle */ |
1161 | INIT_LIST_HEAD(list: &m_rt->port_list); |
1162 | INIT_LIST_HEAD(list: &m_rt->slave_rt_list); |
1163 | |
1164 | /* |
1165 | * Add in order of bus id so that when taking the bus_lock |
1166 | * of multiple buses they will always be taken in the same |
1167 | * order to prevent a mutex deadlock. |
1168 | */ |
1169 | insert_after = &stream->master_list; |
1170 | list_for_each_entry_reverse(walk_m_rt, &stream->master_list, stream_node) { |
1171 | if (walk_m_rt->bus->id < bus->id) { |
1172 | insert_after = &walk_m_rt->stream_node; |
1173 | break; |
1174 | } |
1175 | } |
1176 | list_add(new: &m_rt->stream_node, head: insert_after); |
1177 | |
1178 | list_add_tail(new: &m_rt->bus_node, head: &bus->m_rt_list); |
1179 | |
1180 | m_rt->bus = bus; |
1181 | m_rt->stream = stream; |
1182 | |
1183 | return m_rt; |
1184 | } |
1185 | |
1186 | /** |
1187 | * sdw_master_rt_config() - Configure Master runtime handle |
1188 | * |
1189 | * @m_rt: Master runtime handle |
1190 | * @stream_config: Stream configuration |
1191 | * |
1192 | * This function is to be called with bus_lock held. |
1193 | */ |
1194 | |
1195 | static int sdw_master_rt_config(struct sdw_master_runtime *m_rt, |
1196 | struct sdw_stream_config *stream_config) |
1197 | { |
1198 | m_rt->ch_count = stream_config->ch_count; |
1199 | m_rt->direction = stream_config->direction; |
1200 | |
1201 | return 0; |
1202 | } |
1203 | |
1204 | /** |
1205 | * sdw_master_rt_free() - Free Master runtime handle |
1206 | * |
1207 | * @m_rt: Master runtime node |
1208 | * @stream: Stream runtime handle. |
1209 | * |
1210 | * This function is to be called with bus_lock held |
1211 | * It frees the Master runtime handle and associated Slave(s) runtime |
1212 | * handle. If this is called first then sdw_slave_rt_free() will have |
1213 | * no effect as Slave(s) runtime handle would already be freed up. |
1214 | */ |
1215 | static void sdw_master_rt_free(struct sdw_master_runtime *m_rt, |
1216 | struct sdw_stream_runtime *stream) |
1217 | { |
1218 | struct sdw_slave_runtime *s_rt, *_s_rt; |
1219 | |
1220 | list_for_each_entry_safe(s_rt, _s_rt, &m_rt->slave_rt_list, m_rt_node) { |
1221 | sdw_slave_port_free(slave: s_rt->slave, stream); |
1222 | sdw_slave_rt_free(slave: s_rt->slave, stream); |
1223 | } |
1224 | |
1225 | list_del(entry: &m_rt->stream_node); |
1226 | list_del(entry: &m_rt->bus_node); |
1227 | kfree(objp: m_rt); |
1228 | } |
1229 | |
1230 | /** |
1231 | * sdw_config_stream() - Configure the allocated stream |
1232 | * |
1233 | * @dev: SDW device |
1234 | * @stream: SoundWire stream |
1235 | * @stream_config: Stream configuration for audio stream |
1236 | * @is_slave: is API called from Slave or Master |
1237 | * |
1238 | * This function is to be called with bus_lock held. |
1239 | */ |
1240 | static int sdw_config_stream(struct device *dev, |
1241 | struct sdw_stream_runtime *stream, |
1242 | struct sdw_stream_config *stream_config, |
1243 | bool is_slave) |
1244 | { |
1245 | /* |
1246 | * Update the stream rate, channel and bps based on data |
1247 | * source. For more than one data source (multilink), |
1248 | * match the rate, bps, stream type and increment number of channels. |
1249 | * |
1250 | * If rate/bps is zero, it means the values are not set, so skip |
1251 | * comparison and allow the value to be set and stored in stream |
1252 | */ |
1253 | if (stream->params.rate && |
1254 | stream->params.rate != stream_config->frame_rate) { |
1255 | dev_err(dev, "rate not matching, stream:%s\n" , stream->name); |
1256 | return -EINVAL; |
1257 | } |
1258 | |
1259 | if (stream->params.bps && |
1260 | stream->params.bps != stream_config->bps) { |
1261 | dev_err(dev, "bps not matching, stream:%s\n" , stream->name); |
1262 | return -EINVAL; |
1263 | } |
1264 | |
1265 | stream->type = stream_config->type; |
1266 | stream->params.rate = stream_config->frame_rate; |
1267 | stream->params.bps = stream_config->bps; |
1268 | |
1269 | /* TODO: Update this check during Device-device support */ |
1270 | if (is_slave) |
1271 | stream->params.ch_count += stream_config->ch_count; |
1272 | |
1273 | return 0; |
1274 | } |
1275 | |
1276 | /** |
1277 | * sdw_get_slave_dpn_prop() - Get Slave port capabilities |
1278 | * |
1279 | * @slave: Slave handle |
1280 | * @direction: Data direction. |
1281 | * @port_num: Port number |
1282 | */ |
1283 | struct sdw_dpn_prop *sdw_get_slave_dpn_prop(struct sdw_slave *slave, |
1284 | enum sdw_data_direction direction, |
1285 | unsigned int port_num) |
1286 | { |
1287 | struct sdw_dpn_prop *dpn_prop; |
1288 | u8 num_ports; |
1289 | int i; |
1290 | |
1291 | if (direction == SDW_DATA_DIR_TX) { |
1292 | num_ports = hweight32(slave->prop.source_ports); |
1293 | dpn_prop = slave->prop.src_dpn_prop; |
1294 | } else { |
1295 | num_ports = hweight32(slave->prop.sink_ports); |
1296 | dpn_prop = slave->prop.sink_dpn_prop; |
1297 | } |
1298 | |
1299 | for (i = 0; i < num_ports; i++) { |
1300 | if (dpn_prop[i].num == port_num) |
1301 | return &dpn_prop[i]; |
1302 | } |
1303 | |
1304 | return NULL; |
1305 | } |
1306 | |
1307 | /** |
1308 | * sdw_acquire_bus_lock: Acquire bus lock for all Master runtime(s) |
1309 | * |
1310 | * @stream: SoundWire stream |
1311 | * |
1312 | * Acquire bus_lock for each of the master runtime(m_rt) part of this |
1313 | * stream to reconfigure the bus. |
1314 | * NOTE: This function is called from SoundWire stream ops and is |
1315 | * expected that a global lock is held before acquiring bus_lock. |
1316 | */ |
1317 | static void sdw_acquire_bus_lock(struct sdw_stream_runtime *stream) |
1318 | { |
1319 | struct sdw_master_runtime *m_rt; |
1320 | struct sdw_bus *bus; |
1321 | |
1322 | /* Iterate for all Master(s) in Master list */ |
1323 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
1324 | bus = m_rt->bus; |
1325 | |
1326 | mutex_lock(&bus->bus_lock); |
1327 | } |
1328 | } |
1329 | |
1330 | /** |
1331 | * sdw_release_bus_lock: Release bus lock for all Master runtime(s) |
1332 | * |
1333 | * @stream: SoundWire stream |
1334 | * |
1335 | * Release the previously held bus_lock after reconfiguring the bus. |
1336 | * NOTE: This function is called from SoundWire stream ops and is |
1337 | * expected that a global lock is held before releasing bus_lock. |
1338 | */ |
1339 | static void sdw_release_bus_lock(struct sdw_stream_runtime *stream) |
1340 | { |
1341 | struct sdw_master_runtime *m_rt; |
1342 | struct sdw_bus *bus; |
1343 | |
1344 | /* Iterate for all Master(s) in Master list */ |
1345 | list_for_each_entry_reverse(m_rt, &stream->master_list, stream_node) { |
1346 | bus = m_rt->bus; |
1347 | mutex_unlock(lock: &bus->bus_lock); |
1348 | } |
1349 | } |
1350 | |
1351 | static int _sdw_prepare_stream(struct sdw_stream_runtime *stream, |
1352 | bool update_params) |
1353 | { |
1354 | struct sdw_master_runtime *m_rt; |
1355 | struct sdw_bus *bus; |
1356 | struct sdw_master_prop *prop; |
1357 | struct sdw_bus_params params; |
1358 | int ret; |
1359 | |
1360 | /* Prepare Master(s) and Slave(s) port(s) associated with stream */ |
1361 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
1362 | bus = m_rt->bus; |
1363 | prop = &bus->prop; |
1364 | memcpy(¶ms, &bus->params, sizeof(params)); |
1365 | |
1366 | /* TODO: Support Asynchronous mode */ |
1367 | if ((prop->max_clk_freq % stream->params.rate) != 0) { |
1368 | dev_err(bus->dev, "Async mode not supported\n" ); |
1369 | return -EINVAL; |
1370 | } |
1371 | |
1372 | if (update_params) { |
1373 | /* Increment cumulative bus bandwidth */ |
1374 | /* TODO: Update this during Device-Device support */ |
1375 | bus->params.bandwidth += m_rt->stream->params.rate * |
1376 | m_rt->ch_count * m_rt->stream->params.bps; |
1377 | |
1378 | /* Compute params */ |
1379 | if (bus->compute_params) { |
1380 | ret = bus->compute_params(bus); |
1381 | if (ret < 0) { |
1382 | dev_err(bus->dev, "Compute params failed: %d\n" , |
1383 | ret); |
1384 | goto restore_params; |
1385 | } |
1386 | } |
1387 | } |
1388 | |
1389 | /* Program params */ |
1390 | ret = sdw_program_params(bus, prepare: true); |
1391 | if (ret < 0) { |
1392 | dev_err(bus->dev, "Program params failed: %d\n" , ret); |
1393 | goto restore_params; |
1394 | } |
1395 | } |
1396 | |
1397 | ret = do_bank_switch(stream); |
1398 | if (ret < 0) { |
1399 | pr_err("%s: do_bank_switch failed: %d\n" , __func__, ret); |
1400 | goto restore_params; |
1401 | } |
1402 | |
1403 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
1404 | bus = m_rt->bus; |
1405 | |
1406 | /* Prepare port(s) on the new clock configuration */ |
1407 | ret = sdw_prep_deprep_ports(m_rt, prep: true); |
1408 | if (ret < 0) { |
1409 | dev_err(bus->dev, "Prepare port(s) failed ret = %d\n" , |
1410 | ret); |
1411 | return ret; |
1412 | } |
1413 | } |
1414 | |
1415 | stream->state = SDW_STREAM_PREPARED; |
1416 | |
1417 | return ret; |
1418 | |
1419 | restore_params: |
1420 | memcpy(&bus->params, ¶ms, sizeof(params)); |
1421 | return ret; |
1422 | } |
1423 | |
1424 | /** |
1425 | * sdw_prepare_stream() - Prepare SoundWire stream |
1426 | * |
1427 | * @stream: Soundwire stream |
1428 | * |
1429 | * Documentation/driver-api/soundwire/stream.rst explains this API in detail |
1430 | */ |
1431 | int sdw_prepare_stream(struct sdw_stream_runtime *stream) |
1432 | { |
1433 | bool update_params = true; |
1434 | int ret; |
1435 | |
1436 | if (!stream) { |
1437 | pr_err("SoundWire: Handle not found for stream\n" ); |
1438 | return -EINVAL; |
1439 | } |
1440 | |
1441 | sdw_acquire_bus_lock(stream); |
1442 | |
1443 | if (stream->state == SDW_STREAM_PREPARED) { |
1444 | ret = 0; |
1445 | goto state_err; |
1446 | } |
1447 | |
1448 | if (stream->state != SDW_STREAM_CONFIGURED && |
1449 | stream->state != SDW_STREAM_DEPREPARED && |
1450 | stream->state != SDW_STREAM_DISABLED) { |
1451 | pr_err("%s: %s: inconsistent state state %d\n" , |
1452 | __func__, stream->name, stream->state); |
1453 | ret = -EINVAL; |
1454 | goto state_err; |
1455 | } |
1456 | |
1457 | /* |
1458 | * when the stream is DISABLED, this means sdw_prepare_stream() |
1459 | * is called as a result of an underflow or a resume operation. |
1460 | * In this case, the bus parameters shall not be recomputed, but |
1461 | * still need to be re-applied |
1462 | */ |
1463 | if (stream->state == SDW_STREAM_DISABLED) |
1464 | update_params = false; |
1465 | |
1466 | ret = _sdw_prepare_stream(stream, update_params); |
1467 | |
1468 | state_err: |
1469 | sdw_release_bus_lock(stream); |
1470 | return ret; |
1471 | } |
1472 | EXPORT_SYMBOL(sdw_prepare_stream); |
1473 | |
1474 | static int _sdw_enable_stream(struct sdw_stream_runtime *stream) |
1475 | { |
1476 | struct sdw_master_runtime *m_rt; |
1477 | struct sdw_bus *bus; |
1478 | int ret; |
1479 | |
1480 | /* Enable Master(s) and Slave(s) port(s) associated with stream */ |
1481 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
1482 | bus = m_rt->bus; |
1483 | |
1484 | /* Program params */ |
1485 | ret = sdw_program_params(bus, prepare: false); |
1486 | if (ret < 0) { |
1487 | dev_err(bus->dev, "%s: Program params failed: %d\n" , __func__, ret); |
1488 | return ret; |
1489 | } |
1490 | |
1491 | /* Enable port(s) */ |
1492 | ret = sdw_enable_disable_ports(m_rt, en: true); |
1493 | if (ret < 0) { |
1494 | dev_err(bus->dev, |
1495 | "Enable port(s) failed ret: %d\n" , ret); |
1496 | return ret; |
1497 | } |
1498 | } |
1499 | |
1500 | ret = do_bank_switch(stream); |
1501 | if (ret < 0) { |
1502 | pr_err("%s: do_bank_switch failed: %d\n" , __func__, ret); |
1503 | return ret; |
1504 | } |
1505 | |
1506 | stream->state = SDW_STREAM_ENABLED; |
1507 | return 0; |
1508 | } |
1509 | |
1510 | /** |
1511 | * sdw_enable_stream() - Enable SoundWire stream |
1512 | * |
1513 | * @stream: Soundwire stream |
1514 | * |
1515 | * Documentation/driver-api/soundwire/stream.rst explains this API in detail |
1516 | */ |
1517 | int sdw_enable_stream(struct sdw_stream_runtime *stream) |
1518 | { |
1519 | int ret; |
1520 | |
1521 | if (!stream) { |
1522 | pr_err("SoundWire: Handle not found for stream\n" ); |
1523 | return -EINVAL; |
1524 | } |
1525 | |
1526 | sdw_acquire_bus_lock(stream); |
1527 | |
1528 | if (stream->state == SDW_STREAM_ENABLED) { |
1529 | ret = 0; |
1530 | goto state_err; |
1531 | } |
1532 | |
1533 | if (stream->state != SDW_STREAM_PREPARED && |
1534 | stream->state != SDW_STREAM_DISABLED) { |
1535 | pr_err("%s: %s: inconsistent state state %d\n" , |
1536 | __func__, stream->name, stream->state); |
1537 | ret = -EINVAL; |
1538 | goto state_err; |
1539 | } |
1540 | |
1541 | ret = _sdw_enable_stream(stream); |
1542 | |
1543 | state_err: |
1544 | sdw_release_bus_lock(stream); |
1545 | return ret; |
1546 | } |
1547 | EXPORT_SYMBOL(sdw_enable_stream); |
1548 | |
1549 | static int _sdw_disable_stream(struct sdw_stream_runtime *stream) |
1550 | { |
1551 | struct sdw_master_runtime *m_rt; |
1552 | int ret; |
1553 | |
1554 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
1555 | struct sdw_bus *bus = m_rt->bus; |
1556 | |
1557 | /* Disable port(s) */ |
1558 | ret = sdw_enable_disable_ports(m_rt, en: false); |
1559 | if (ret < 0) { |
1560 | dev_err(bus->dev, "Disable port(s) failed: %d\n" , ret); |
1561 | return ret; |
1562 | } |
1563 | } |
1564 | stream->state = SDW_STREAM_DISABLED; |
1565 | |
1566 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
1567 | struct sdw_bus *bus = m_rt->bus; |
1568 | |
1569 | /* Program params */ |
1570 | ret = sdw_program_params(bus, prepare: false); |
1571 | if (ret < 0) { |
1572 | dev_err(bus->dev, "%s: Program params failed: %d\n" , __func__, ret); |
1573 | return ret; |
1574 | } |
1575 | } |
1576 | |
1577 | ret = do_bank_switch(stream); |
1578 | if (ret < 0) { |
1579 | pr_err("%s: do_bank_switch failed: %d\n" , __func__, ret); |
1580 | return ret; |
1581 | } |
1582 | |
1583 | /* make sure alternate bank (previous current) is also disabled */ |
1584 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
1585 | struct sdw_bus *bus = m_rt->bus; |
1586 | |
1587 | /* Disable port(s) */ |
1588 | ret = sdw_enable_disable_ports(m_rt, en: false); |
1589 | if (ret < 0) { |
1590 | dev_err(bus->dev, "Disable port(s) failed: %d\n" , ret); |
1591 | return ret; |
1592 | } |
1593 | } |
1594 | |
1595 | return 0; |
1596 | } |
1597 | |
1598 | /** |
1599 | * sdw_disable_stream() - Disable SoundWire stream |
1600 | * |
1601 | * @stream: Soundwire stream |
1602 | * |
1603 | * Documentation/driver-api/soundwire/stream.rst explains this API in detail |
1604 | */ |
1605 | int sdw_disable_stream(struct sdw_stream_runtime *stream) |
1606 | { |
1607 | int ret; |
1608 | |
1609 | if (!stream) { |
1610 | pr_err("SoundWire: Handle not found for stream\n" ); |
1611 | return -EINVAL; |
1612 | } |
1613 | |
1614 | sdw_acquire_bus_lock(stream); |
1615 | |
1616 | if (stream->state == SDW_STREAM_DISABLED) { |
1617 | ret = 0; |
1618 | goto state_err; |
1619 | } |
1620 | |
1621 | if (stream->state != SDW_STREAM_ENABLED) { |
1622 | pr_err("%s: %s: inconsistent state state %d\n" , |
1623 | __func__, stream->name, stream->state); |
1624 | ret = -EINVAL; |
1625 | goto state_err; |
1626 | } |
1627 | |
1628 | ret = _sdw_disable_stream(stream); |
1629 | |
1630 | state_err: |
1631 | sdw_release_bus_lock(stream); |
1632 | return ret; |
1633 | } |
1634 | EXPORT_SYMBOL(sdw_disable_stream); |
1635 | |
1636 | static int _sdw_deprepare_stream(struct sdw_stream_runtime *stream) |
1637 | { |
1638 | struct sdw_master_runtime *m_rt; |
1639 | struct sdw_bus *bus; |
1640 | int ret = 0; |
1641 | |
1642 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
1643 | bus = m_rt->bus; |
1644 | /* De-prepare port(s) */ |
1645 | ret = sdw_prep_deprep_ports(m_rt, prep: false); |
1646 | if (ret < 0) { |
1647 | dev_err(bus->dev, |
1648 | "De-prepare port(s) failed: %d\n" , ret); |
1649 | return ret; |
1650 | } |
1651 | |
1652 | /* TODO: Update this during Device-Device support */ |
1653 | bus->params.bandwidth -= m_rt->stream->params.rate * |
1654 | m_rt->ch_count * m_rt->stream->params.bps; |
1655 | |
1656 | /* Compute params */ |
1657 | if (bus->compute_params) { |
1658 | ret = bus->compute_params(bus); |
1659 | if (ret < 0) { |
1660 | dev_err(bus->dev, "Compute params failed: %d\n" , |
1661 | ret); |
1662 | return ret; |
1663 | } |
1664 | } |
1665 | |
1666 | /* Program params */ |
1667 | ret = sdw_program_params(bus, prepare: false); |
1668 | if (ret < 0) { |
1669 | dev_err(bus->dev, "%s: Program params failed: %d\n" , __func__, ret); |
1670 | return ret; |
1671 | } |
1672 | } |
1673 | |
1674 | stream->state = SDW_STREAM_DEPREPARED; |
1675 | return do_bank_switch(stream); |
1676 | } |
1677 | |
1678 | /** |
1679 | * sdw_deprepare_stream() - Deprepare SoundWire stream |
1680 | * |
1681 | * @stream: Soundwire stream |
1682 | * |
1683 | * Documentation/driver-api/soundwire/stream.rst explains this API in detail |
1684 | */ |
1685 | int sdw_deprepare_stream(struct sdw_stream_runtime *stream) |
1686 | { |
1687 | int ret; |
1688 | |
1689 | if (!stream) { |
1690 | pr_err("SoundWire: Handle not found for stream\n" ); |
1691 | return -EINVAL; |
1692 | } |
1693 | |
1694 | sdw_acquire_bus_lock(stream); |
1695 | |
1696 | if (stream->state == SDW_STREAM_DEPREPARED) { |
1697 | ret = 0; |
1698 | goto state_err; |
1699 | } |
1700 | |
1701 | if (stream->state != SDW_STREAM_PREPARED && |
1702 | stream->state != SDW_STREAM_DISABLED) { |
1703 | pr_err("%s: %s: inconsistent state state %d\n" , |
1704 | __func__, stream->name, stream->state); |
1705 | ret = -EINVAL; |
1706 | goto state_err; |
1707 | } |
1708 | |
1709 | ret = _sdw_deprepare_stream(stream); |
1710 | |
1711 | state_err: |
1712 | sdw_release_bus_lock(stream); |
1713 | return ret; |
1714 | } |
1715 | EXPORT_SYMBOL(sdw_deprepare_stream); |
1716 | |
1717 | static int set_stream(struct snd_pcm_substream *substream, |
1718 | struct sdw_stream_runtime *sdw_stream) |
1719 | { |
1720 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
1721 | struct snd_soc_dai *dai; |
1722 | int ret = 0; |
1723 | int i; |
1724 | |
1725 | /* Set stream pointer on all DAIs */ |
1726 | for_each_rtd_dais(rtd, i, dai) { |
1727 | ret = snd_soc_dai_set_stream(dai, stream: sdw_stream, direction: substream->stream); |
1728 | if (ret < 0) { |
1729 | dev_err(rtd->dev, "failed to set stream pointer on dai %s\n" , dai->name); |
1730 | break; |
1731 | } |
1732 | } |
1733 | |
1734 | return ret; |
1735 | } |
1736 | |
1737 | /** |
1738 | * sdw_alloc_stream() - Allocate and return stream runtime |
1739 | * |
1740 | * @stream_name: SoundWire stream name |
1741 | * |
1742 | * Allocates a SoundWire stream runtime instance. |
1743 | * sdw_alloc_stream should be called only once per stream. Typically |
1744 | * invoked from ALSA/ASoC machine/platform driver. |
1745 | */ |
1746 | struct sdw_stream_runtime *sdw_alloc_stream(const char *stream_name) |
1747 | { |
1748 | struct sdw_stream_runtime *stream; |
1749 | |
1750 | stream = kzalloc(size: sizeof(*stream), GFP_KERNEL); |
1751 | if (!stream) |
1752 | return NULL; |
1753 | |
1754 | stream->name = stream_name; |
1755 | INIT_LIST_HEAD(list: &stream->master_list); |
1756 | stream->state = SDW_STREAM_ALLOCATED; |
1757 | stream->m_rt_count = 0; |
1758 | |
1759 | return stream; |
1760 | } |
1761 | EXPORT_SYMBOL(sdw_alloc_stream); |
1762 | |
1763 | /** |
1764 | * sdw_startup_stream() - Startup SoundWire stream |
1765 | * |
1766 | * @sdw_substream: Soundwire stream |
1767 | * |
1768 | * Documentation/driver-api/soundwire/stream.rst explains this API in detail |
1769 | */ |
1770 | int sdw_startup_stream(void *sdw_substream) |
1771 | { |
1772 | struct snd_pcm_substream *substream = sdw_substream; |
1773 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
1774 | struct sdw_stream_runtime *sdw_stream; |
1775 | char *name; |
1776 | int ret; |
1777 | |
1778 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
1779 | name = kasprintf(GFP_KERNEL, fmt: "%s-Playback" , substream->name); |
1780 | else |
1781 | name = kasprintf(GFP_KERNEL, fmt: "%s-Capture" , substream->name); |
1782 | |
1783 | if (!name) |
1784 | return -ENOMEM; |
1785 | |
1786 | sdw_stream = sdw_alloc_stream(name); |
1787 | if (!sdw_stream) { |
1788 | dev_err(rtd->dev, "alloc stream failed for substream DAI %s\n" , substream->name); |
1789 | ret = -ENOMEM; |
1790 | goto error; |
1791 | } |
1792 | |
1793 | ret = set_stream(substream, sdw_stream); |
1794 | if (ret < 0) |
1795 | goto release_stream; |
1796 | return 0; |
1797 | |
1798 | release_stream: |
1799 | sdw_release_stream(stream: sdw_stream); |
1800 | set_stream(substream, NULL); |
1801 | error: |
1802 | kfree(objp: name); |
1803 | return ret; |
1804 | } |
1805 | EXPORT_SYMBOL(sdw_startup_stream); |
1806 | |
1807 | /** |
1808 | * sdw_shutdown_stream() - Shutdown SoundWire stream |
1809 | * |
1810 | * @sdw_substream: Soundwire stream |
1811 | * |
1812 | * Documentation/driver-api/soundwire/stream.rst explains this API in detail |
1813 | */ |
1814 | void sdw_shutdown_stream(void *sdw_substream) |
1815 | { |
1816 | struct snd_pcm_substream *substream = sdw_substream; |
1817 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
1818 | struct sdw_stream_runtime *sdw_stream; |
1819 | struct snd_soc_dai *dai; |
1820 | |
1821 | /* Find stream from first CPU DAI */ |
1822 | dai = snd_soc_rtd_to_cpu(rtd, 0); |
1823 | |
1824 | sdw_stream = snd_soc_dai_get_stream(dai, direction: substream->stream); |
1825 | |
1826 | if (IS_ERR(ptr: sdw_stream)) { |
1827 | dev_err(rtd->dev, "no stream found for DAI %s\n" , dai->name); |
1828 | return; |
1829 | } |
1830 | |
1831 | /* release memory */ |
1832 | kfree(objp: sdw_stream->name); |
1833 | sdw_release_stream(stream: sdw_stream); |
1834 | |
1835 | /* clear DAI data */ |
1836 | set_stream(substream, NULL); |
1837 | } |
1838 | EXPORT_SYMBOL(sdw_shutdown_stream); |
1839 | |
1840 | /** |
1841 | * sdw_release_stream() - Free the assigned stream runtime |
1842 | * |
1843 | * @stream: SoundWire stream runtime |
1844 | * |
1845 | * sdw_release_stream should be called only once per stream |
1846 | */ |
1847 | void sdw_release_stream(struct sdw_stream_runtime *stream) |
1848 | { |
1849 | kfree(objp: stream); |
1850 | } |
1851 | EXPORT_SYMBOL(sdw_release_stream); |
1852 | |
1853 | /** |
1854 | * sdw_stream_add_master() - Allocate and add master runtime to a stream |
1855 | * |
1856 | * @bus: SDW Bus instance |
1857 | * @stream_config: Stream configuration for audio stream |
1858 | * @port_config: Port configuration for audio stream |
1859 | * @num_ports: Number of ports |
1860 | * @stream: SoundWire stream |
1861 | */ |
1862 | int sdw_stream_add_master(struct sdw_bus *bus, |
1863 | struct sdw_stream_config *stream_config, |
1864 | struct sdw_port_config *port_config, |
1865 | unsigned int num_ports, |
1866 | struct sdw_stream_runtime *stream) |
1867 | { |
1868 | struct sdw_master_runtime *m_rt; |
1869 | bool alloc_master_rt = false; |
1870 | int ret; |
1871 | |
1872 | mutex_lock(&bus->bus_lock); |
1873 | |
1874 | /* |
1875 | * For multi link streams, add the second master only if |
1876 | * the bus supports it. |
1877 | * Check if bus->multi_link is set |
1878 | */ |
1879 | if (!bus->multi_link && stream->m_rt_count > 0) { |
1880 | dev_err(bus->dev, |
1881 | "Multilink not supported, link %d\n" , bus->link_id); |
1882 | ret = -EINVAL; |
1883 | goto unlock; |
1884 | } |
1885 | |
1886 | /* |
1887 | * check if Master is already allocated (e.g. as a result of Slave adding |
1888 | * it first), if so skip allocation and go to configuration |
1889 | */ |
1890 | m_rt = sdw_master_rt_find(bus, stream); |
1891 | if (!m_rt) { |
1892 | m_rt = sdw_master_rt_alloc(bus, stream); |
1893 | if (!m_rt) { |
1894 | dev_err(bus->dev, "%s: Master runtime alloc failed for stream:%s\n" , |
1895 | __func__, stream->name); |
1896 | ret = -ENOMEM; |
1897 | goto unlock; |
1898 | } |
1899 | |
1900 | alloc_master_rt = true; |
1901 | } |
1902 | |
1903 | if (!sdw_master_port_allocated(m_rt)) { |
1904 | ret = sdw_master_port_alloc(m_rt, num_ports); |
1905 | if (ret) |
1906 | goto alloc_error; |
1907 | |
1908 | stream->m_rt_count++; |
1909 | } |
1910 | |
1911 | ret = sdw_master_rt_config(m_rt, stream_config); |
1912 | if (ret < 0) |
1913 | goto unlock; |
1914 | |
1915 | ret = sdw_config_stream(dev: bus->dev, stream, stream_config, is_slave: false); |
1916 | if (ret) |
1917 | goto unlock; |
1918 | |
1919 | ret = sdw_master_port_config(m_rt, port_config); |
1920 | |
1921 | goto unlock; |
1922 | |
1923 | alloc_error: |
1924 | /* |
1925 | * we only cleanup what was allocated in this routine |
1926 | */ |
1927 | if (alloc_master_rt) |
1928 | sdw_master_rt_free(m_rt, stream); |
1929 | unlock: |
1930 | mutex_unlock(lock: &bus->bus_lock); |
1931 | return ret; |
1932 | } |
1933 | EXPORT_SYMBOL(sdw_stream_add_master); |
1934 | |
1935 | /** |
1936 | * sdw_stream_remove_master() - Remove master from sdw_stream |
1937 | * |
1938 | * @bus: SDW Bus instance |
1939 | * @stream: SoundWire stream |
1940 | * |
1941 | * This removes and frees port_rt and master_rt from a stream |
1942 | */ |
1943 | int sdw_stream_remove_master(struct sdw_bus *bus, |
1944 | struct sdw_stream_runtime *stream) |
1945 | { |
1946 | struct sdw_master_runtime *m_rt, *_m_rt; |
1947 | |
1948 | mutex_lock(&bus->bus_lock); |
1949 | |
1950 | list_for_each_entry_safe(m_rt, _m_rt, |
1951 | &stream->master_list, stream_node) { |
1952 | if (m_rt->bus != bus) |
1953 | continue; |
1954 | |
1955 | sdw_master_port_free(m_rt); |
1956 | sdw_master_rt_free(m_rt, stream); |
1957 | stream->m_rt_count--; |
1958 | } |
1959 | |
1960 | if (list_empty(head: &stream->master_list)) |
1961 | stream->state = SDW_STREAM_RELEASED; |
1962 | |
1963 | mutex_unlock(lock: &bus->bus_lock); |
1964 | |
1965 | return 0; |
1966 | } |
1967 | EXPORT_SYMBOL(sdw_stream_remove_master); |
1968 | |
1969 | /** |
1970 | * sdw_stream_add_slave() - Allocate and add master/slave runtime to a stream |
1971 | * |
1972 | * @slave: SDW Slave instance |
1973 | * @stream_config: Stream configuration for audio stream |
1974 | * @stream: SoundWire stream |
1975 | * @port_config: Port configuration for audio stream |
1976 | * @num_ports: Number of ports |
1977 | * |
1978 | * It is expected that Slave is added before adding Master |
1979 | * to the Stream. |
1980 | * |
1981 | */ |
1982 | int sdw_stream_add_slave(struct sdw_slave *slave, |
1983 | struct sdw_stream_config *stream_config, |
1984 | struct sdw_port_config *port_config, |
1985 | unsigned int num_ports, |
1986 | struct sdw_stream_runtime *stream) |
1987 | { |
1988 | struct sdw_slave_runtime *s_rt; |
1989 | struct sdw_master_runtime *m_rt; |
1990 | bool alloc_master_rt = false; |
1991 | bool alloc_slave_rt = false; |
1992 | |
1993 | int ret; |
1994 | |
1995 | mutex_lock(&slave->bus->bus_lock); |
1996 | |
1997 | /* |
1998 | * check if Master is already allocated, if so skip allocation |
1999 | * and go to configuration |
2000 | */ |
2001 | m_rt = sdw_master_rt_find(bus: slave->bus, stream); |
2002 | if (!m_rt) { |
2003 | /* |
2004 | * If this API is invoked by Slave first then m_rt is not valid. |
2005 | * So, allocate m_rt and add Slave to it. |
2006 | */ |
2007 | m_rt = sdw_master_rt_alloc(bus: slave->bus, stream); |
2008 | if (!m_rt) { |
2009 | dev_err(&slave->dev, "%s: Master runtime alloc failed for stream:%s\n" , |
2010 | __func__, stream->name); |
2011 | ret = -ENOMEM; |
2012 | goto unlock; |
2013 | } |
2014 | |
2015 | alloc_master_rt = true; |
2016 | } |
2017 | |
2018 | s_rt = sdw_slave_rt_find(slave, stream); |
2019 | if (!s_rt) { |
2020 | s_rt = sdw_slave_rt_alloc(slave, m_rt); |
2021 | if (!s_rt) { |
2022 | dev_err(&slave->dev, "Slave runtime alloc failed for stream:%s\n" , |
2023 | stream->name); |
2024 | ret = -ENOMEM; |
2025 | goto alloc_error; |
2026 | } |
2027 | |
2028 | alloc_slave_rt = true; |
2029 | } |
2030 | |
2031 | if (!sdw_slave_port_allocated(s_rt)) { |
2032 | ret = sdw_slave_port_alloc(slave, s_rt, num_config: num_ports); |
2033 | if (ret) |
2034 | goto alloc_error; |
2035 | } |
2036 | |
2037 | ret = sdw_master_rt_config(m_rt, stream_config); |
2038 | if (ret) |
2039 | goto unlock; |
2040 | |
2041 | ret = sdw_slave_rt_config(s_rt, stream_config); |
2042 | if (ret) |
2043 | goto unlock; |
2044 | |
2045 | ret = sdw_config_stream(dev: &slave->dev, stream, stream_config, is_slave: true); |
2046 | if (ret) |
2047 | goto unlock; |
2048 | |
2049 | ret = sdw_slave_port_config(slave, s_rt, port_config); |
2050 | if (ret) |
2051 | goto unlock; |
2052 | |
2053 | /* |
2054 | * Change stream state to CONFIGURED on first Slave add. |
2055 | * Bus is not aware of number of Slave(s) in a stream at this |
2056 | * point so cannot depend on all Slave(s) to be added in order to |
2057 | * change stream state to CONFIGURED. |
2058 | */ |
2059 | stream->state = SDW_STREAM_CONFIGURED; |
2060 | goto unlock; |
2061 | |
2062 | alloc_error: |
2063 | /* |
2064 | * we only cleanup what was allocated in this routine. The 'else if' |
2065 | * is intentional, the 'master_rt_free' will call sdw_slave_rt_free() |
2066 | * internally. |
2067 | */ |
2068 | if (alloc_master_rt) |
2069 | sdw_master_rt_free(m_rt, stream); |
2070 | else if (alloc_slave_rt) |
2071 | sdw_slave_rt_free(slave, stream); |
2072 | unlock: |
2073 | mutex_unlock(lock: &slave->bus->bus_lock); |
2074 | return ret; |
2075 | } |
2076 | EXPORT_SYMBOL(sdw_stream_add_slave); |
2077 | |
2078 | /** |
2079 | * sdw_stream_remove_slave() - Remove slave from sdw_stream |
2080 | * |
2081 | * @slave: SDW Slave instance |
2082 | * @stream: SoundWire stream |
2083 | * |
2084 | * This removes and frees port_rt and slave_rt from a stream |
2085 | */ |
2086 | int sdw_stream_remove_slave(struct sdw_slave *slave, |
2087 | struct sdw_stream_runtime *stream) |
2088 | { |
2089 | mutex_lock(&slave->bus->bus_lock); |
2090 | |
2091 | sdw_slave_port_free(slave, stream); |
2092 | sdw_slave_rt_free(slave, stream); |
2093 | |
2094 | mutex_unlock(lock: &slave->bus->bus_lock); |
2095 | |
2096 | return 0; |
2097 | } |
2098 | EXPORT_SYMBOL(sdw_stream_remove_slave); |
2099 | |