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-rw-r--r--drivers/soundwire/stream.c1479
1 files changed, 1479 insertions, 0 deletions
diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c
new file mode 100644
index 000000000000..8974a0fcda1b
--- /dev/null
+++ b/drivers/soundwire/stream.c
@@ -0,0 +1,1479 @@
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 "bus.h"
17
18/*
19 * Array of supported rows and columns as per MIPI SoundWire Specification 1.1
20 *
21 * The rows are arranged as per the array index value programmed
22 * in register. The index 15 has dummy value 0 in order to fill hole.
23 */
24int rows[SDW_FRAME_ROWS] = {48, 50, 60, 64, 75, 80, 125, 147,
25 96, 100, 120, 128, 150, 160, 250, 0,
26 192, 200, 240, 256, 72, 144, 90, 180};
27
28int cols[SDW_FRAME_COLS] = {2, 4, 6, 8, 10, 12, 14, 16};
29
30static int sdw_find_col_index(int col)
31{
32 int i;
33
34 for (i = 0; i < SDW_FRAME_COLS; i++) {
35 if (cols[i] == col)
36 return i;
37 }
38
39 pr_warn("Requested column not found, selecting lowest column no: 2\n");
40 return 0;
41}
42
43static int sdw_find_row_index(int row)
44{
45 int i;
46
47 for (i = 0; i < SDW_FRAME_ROWS; i++) {
48 if (rows[i] == row)
49 return i;
50 }
51
52 pr_warn("Requested row not found, selecting lowest row no: 48\n");
53 return 0;
54}
55static int _sdw_program_slave_port_params(struct sdw_bus *bus,
56 struct sdw_slave *slave,
57 struct sdw_transport_params *t_params,
58 enum sdw_dpn_type type)
59{
60 u32 addr1, addr2, addr3, addr4;
61 int ret;
62 u16 wbuf;
63
64 if (bus->params.next_bank) {
65 addr1 = SDW_DPN_OFFSETCTRL2_B1(t_params->port_num);
66 addr2 = SDW_DPN_BLOCKCTRL3_B1(t_params->port_num);
67 addr3 = SDW_DPN_SAMPLECTRL2_B1(t_params->port_num);
68 addr4 = SDW_DPN_HCTRL_B1(t_params->port_num);
69 } else {
70 addr1 = SDW_DPN_OFFSETCTRL2_B0(t_params->port_num);
71 addr2 = SDW_DPN_BLOCKCTRL3_B0(t_params->port_num);
72 addr3 = SDW_DPN_SAMPLECTRL2_B0(t_params->port_num);
73 addr4 = SDW_DPN_HCTRL_B0(t_params->port_num);
74 }
75
76 /* Program DPN_OffsetCtrl2 registers */
77 ret = sdw_write(slave, addr1, t_params->offset2);
78 if (ret < 0) {
79 dev_err(bus->dev, "DPN_OffsetCtrl2 register write failed");
80 return ret;
81 }
82
83 /* Program DPN_BlockCtrl3 register */
84 ret = sdw_write(slave, addr2, t_params->blk_pkg_mode);
85 if (ret < 0) {
86 dev_err(bus->dev, "DPN_BlockCtrl3 register write failed");
87 return ret;
88 }
89
90 /*
91 * Data ports are FULL, SIMPLE and REDUCED. This function handles
92 * FULL and REDUCED only and and beyond this point only FULL is
93 * handled, so bail out if we are not FULL data port type
94 */
95 if (type != SDW_DPN_FULL)
96 return ret;
97
98 /* Program DPN_SampleCtrl2 register */
99 wbuf = (t_params->sample_interval - 1);
100 wbuf &= SDW_DPN_SAMPLECTRL_HIGH;
101 wbuf >>= SDW_REG_SHIFT(SDW_DPN_SAMPLECTRL_HIGH);
102
103 ret = sdw_write(slave, addr3, wbuf);
104 if (ret < 0) {
105 dev_err(bus->dev, "DPN_SampleCtrl2 register write failed");
106 return ret;
107 }
108
109 /* Program DPN_HCtrl register */
110 wbuf = t_params->hstart;
111 wbuf <<= SDW_REG_SHIFT(SDW_DPN_HCTRL_HSTART);
112 wbuf |= t_params->hstop;
113
114 ret = sdw_write(slave, addr4, wbuf);
115 if (ret < 0)
116 dev_err(bus->dev, "DPN_HCtrl register write failed");
117
118 return ret;
119}
120
121static int sdw_program_slave_port_params(struct sdw_bus *bus,
122 struct sdw_slave_runtime *s_rt,
123 struct sdw_port_runtime *p_rt)
124{
125 struct sdw_transport_params *t_params = &p_rt->transport_params;
126 struct sdw_port_params *p_params = &p_rt->port_params;
127 struct sdw_slave_prop *slave_prop = &s_rt->slave->prop;
128 u32 addr1, addr2, addr3, addr4, addr5, addr6;
129 struct sdw_dpn_prop *dpn_prop;
130 int ret;
131 u8 wbuf;
132
133 dpn_prop = sdw_get_slave_dpn_prop(s_rt->slave,
134 s_rt->direction,
135 t_params->port_num);
136 if (!dpn_prop)
137 return -EINVAL;
138
139 addr1 = SDW_DPN_PORTCTRL(t_params->port_num);
140 addr2 = SDW_DPN_BLOCKCTRL1(t_params->port_num);
141
142 if (bus->params.next_bank) {
143 addr3 = SDW_DPN_SAMPLECTRL1_B1(t_params->port_num);
144 addr4 = SDW_DPN_OFFSETCTRL1_B1(t_params->port_num);
145 addr5 = SDW_DPN_BLOCKCTRL2_B1(t_params->port_num);
146 addr6 = SDW_DPN_LANECTRL_B1(t_params->port_num);
147
148 } else {
149 addr3 = SDW_DPN_SAMPLECTRL1_B0(t_params->port_num);
150 addr4 = SDW_DPN_OFFSETCTRL1_B0(t_params->port_num);
151 addr5 = SDW_DPN_BLOCKCTRL2_B0(t_params->port_num);
152 addr6 = SDW_DPN_LANECTRL_B0(t_params->port_num);
153 }
154
155 /* Program DPN_PortCtrl register */
156 wbuf = p_params->data_mode << SDW_REG_SHIFT(SDW_DPN_PORTCTRL_DATAMODE);
157 wbuf |= p_params->flow_mode;
158
159 ret = sdw_update(s_rt->slave, addr1, 0xF, wbuf);
160 if (ret < 0) {
161 dev_err(&s_rt->slave->dev,
162 "DPN_PortCtrl register write failed for port %d",
163 t_params->port_num);
164 return ret;
165 }
166
167 /* Program DPN_BlockCtrl1 register */
168 ret = sdw_write(s_rt->slave, addr2, (p_params->bps - 1));
169 if (ret < 0) {
170 dev_err(&s_rt->slave->dev,
171 "DPN_BlockCtrl1 register write failed for port %d",
172 t_params->port_num);
173 return ret;
174 }
175
176 /* Program DPN_SampleCtrl1 register */
177 wbuf = (t_params->sample_interval - 1) & SDW_DPN_SAMPLECTRL_LOW;
178 ret = sdw_write(s_rt->slave, addr3, wbuf);
179 if (ret < 0) {
180 dev_err(&s_rt->slave->dev,
181 "DPN_SampleCtrl1 register write failed for port %d",
182 t_params->port_num);
183 return ret;
184 }
185
186 /* Program DPN_OffsetCtrl1 registers */
187 ret = sdw_write(s_rt->slave, addr4, t_params->offset1);
188 if (ret < 0) {
189 dev_err(&s_rt->slave->dev,
190 "DPN_OffsetCtrl1 register write failed for port %d",
191 t_params->port_num);
192 return ret;
193 }
194
195 /* Program DPN_BlockCtrl2 register*/
196 if (t_params->blk_grp_ctrl_valid) {
197 ret = sdw_write(s_rt->slave, addr5, t_params->blk_grp_ctrl);
198 if (ret < 0) {
199 dev_err(&s_rt->slave->dev,
200 "DPN_BlockCtrl2 reg write failed for port %d",
201 t_params->port_num);
202 return ret;
203 }
204 }
205
206 /* program DPN_LaneCtrl register */
207 if (slave_prop->lane_control_support) {
208 ret = sdw_write(s_rt->slave, addr6, t_params->lane_ctrl);
209 if (ret < 0) {
210 dev_err(&s_rt->slave->dev,
211 "DPN_LaneCtrl register write failed for port %d",
212 t_params->port_num);
213 return ret;
214 }
215 }
216
217 if (dpn_prop->type != SDW_DPN_SIMPLE) {
218 ret = _sdw_program_slave_port_params(bus, s_rt->slave,
219 t_params, dpn_prop->type);
220 if (ret < 0)
221 dev_err(&s_rt->slave->dev,
222 "Transport reg write failed for port: %d",
223 t_params->port_num);
224 }
225
226 return ret;
227}
228
229static int sdw_program_master_port_params(struct sdw_bus *bus,
230 struct sdw_port_runtime *p_rt)
231{
232 int ret;
233
234 /*
235 * we need to set transport and port parameters for the port.
236 * Transport parameters refers to the smaple interval, offsets and
237 * hstart/stop etc of the data. Port parameters refers to word
238 * length, flow mode etc of the port
239 */
240 ret = bus->port_ops->dpn_set_port_transport_params(bus,
241 &p_rt->transport_params,
242 bus->params.next_bank);
243 if (ret < 0)
244 return ret;
245
246 return bus->port_ops->dpn_set_port_params(bus,
247 &p_rt->port_params,
248 bus->params.next_bank);
249}
250
251/**
252 * sdw_program_port_params() - Programs transport parameters of Master(s)
253 * and Slave(s)
254 *
255 * @m_rt: Master stream runtime
256 */
257static int sdw_program_port_params(struct sdw_master_runtime *m_rt)
258{
259 struct sdw_slave_runtime *s_rt = NULL;
260 struct sdw_bus *bus = m_rt->bus;
261 struct sdw_port_runtime *p_rt;
262 int ret = 0;
263
264 /* Program transport & port parameters for Slave(s) */
265 list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
266 list_for_each_entry(p_rt, &s_rt->port_list, port_node) {
267 ret = sdw_program_slave_port_params(bus, s_rt, p_rt);
268 if (ret < 0)
269 return ret;
270 }
271 }
272
273 /* Program transport & port parameters for Master(s) */
274 list_for_each_entry(p_rt, &m_rt->port_list, port_node) {
275 ret = sdw_program_master_port_params(bus, p_rt);
276 if (ret < 0)
277 return ret;
278 }
279
280 return 0;
281}
282
283/**
284 * sdw_enable_disable_slave_ports: Enable/disable slave data port
285 *
286 * @bus: bus instance
287 * @s_rt: slave runtime
288 * @p_rt: port runtime
289 * @en: enable or disable operation
290 *
291 * This function only sets the enable/disable bits in the relevant bank, the
292 * actual enable/disable is done with a bank switch
293 */
294static int sdw_enable_disable_slave_ports(struct sdw_bus *bus,
295 struct sdw_slave_runtime *s_rt,
296 struct sdw_port_runtime *p_rt, bool en)
297{
298 struct sdw_transport_params *t_params = &p_rt->transport_params;
299 u32 addr;
300 int ret;
301
302 if (bus->params.next_bank)
303 addr = SDW_DPN_CHANNELEN_B1(p_rt->num);
304 else
305 addr = SDW_DPN_CHANNELEN_B0(p_rt->num);
306
307 /*
308 * Since bus doesn't support sharing a port across two streams,
309 * it is safe to reset this register
310 */
311 if (en)
312 ret = sdw_update(s_rt->slave, addr, 0xFF, p_rt->ch_mask);
313 else
314 ret = sdw_update(s_rt->slave, addr, 0xFF, 0x0);
315
316 if (ret < 0)
317 dev_err(&s_rt->slave->dev,
318 "Slave chn_en reg write failed:%d port:%d",
319 ret, t_params->port_num);
320
321 return ret;
322}
323
324static int sdw_enable_disable_master_ports(struct sdw_master_runtime *m_rt,
325 struct sdw_port_runtime *p_rt, bool en)
326{
327 struct sdw_transport_params *t_params = &p_rt->transport_params;
328 struct sdw_bus *bus = m_rt->bus;
329 struct sdw_enable_ch enable_ch;
330 int ret = 0;
331
332 enable_ch.port_num = p_rt->num;
333 enable_ch.ch_mask = p_rt->ch_mask;
334 enable_ch.enable = en;
335
336 /* Perform Master port channel(s) enable/disable */
337 if (bus->port_ops->dpn_port_enable_ch) {
338 ret = bus->port_ops->dpn_port_enable_ch(bus,
339 &enable_ch, bus->params.next_bank);
340 if (ret < 0) {
341 dev_err(bus->dev,
342 "Master chn_en write failed:%d port:%d",
343 ret, t_params->port_num);
344 return ret;
345 }
346 } else {
347 dev_err(bus->dev,
348 "dpn_port_enable_ch not supported, %s failed\n",
349 en ? "enable" : "disable");
350 return -EINVAL;
351 }
352
353 return 0;
354}
355
356/**
357 * sdw_enable_disable_ports() - Enable/disable port(s) for Master and
358 * Slave(s)
359 *
360 * @m_rt: Master stream runtime
361 * @en: mode (enable/disable)
362 */
363static int sdw_enable_disable_ports(struct sdw_master_runtime *m_rt, bool en)
364{
365 struct sdw_port_runtime *s_port, *m_port;
366 struct sdw_slave_runtime *s_rt = NULL;
367 int ret = 0;
368
369 /* Enable/Disable Slave port(s) */
370 list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
371 list_for_each_entry(s_port, &s_rt->port_list, port_node) {
372 ret = sdw_enable_disable_slave_ports(m_rt->bus, s_rt,
373 s_port, en);
374 if (ret < 0)
375 return ret;
376 }
377 }
378
379 /* Enable/Disable Master port(s) */
380 list_for_each_entry(m_port, &m_rt->port_list, port_node) {
381 ret = sdw_enable_disable_master_ports(m_rt, m_port, en);
382 if (ret < 0)
383 return ret;
384 }
385
386 return 0;
387}
388
389static int sdw_do_port_prep(struct sdw_slave_runtime *s_rt,
390 struct sdw_prepare_ch prep_ch, enum sdw_port_prep_ops cmd)
391{
392 const struct sdw_slave_ops *ops = s_rt->slave->ops;
393 int ret;
394
395 if (ops->port_prep) {
396 ret = ops->port_prep(s_rt->slave, &prep_ch, cmd);
397 if (ret < 0) {
398 dev_err(&s_rt->slave->dev,
399 "Slave Port Prep cmd %d failed: %d", cmd, ret);
400 return ret;
401 }
402 }
403
404 return 0;
405}
406
407static int sdw_prep_deprep_slave_ports(struct sdw_bus *bus,
408 struct sdw_slave_runtime *s_rt,
409 struct sdw_port_runtime *p_rt, bool prep)
410{
411 struct completion *port_ready = NULL;
412 struct sdw_dpn_prop *dpn_prop;
413 struct sdw_prepare_ch prep_ch;
414 unsigned int time_left;
415 bool intr = false;
416 int ret = 0, val;
417 u32 addr;
418
419 prep_ch.num = p_rt->num;
420 prep_ch.ch_mask = p_rt->ch_mask;
421
422 dpn_prop = sdw_get_slave_dpn_prop(s_rt->slave,
423 s_rt->direction,
424 prep_ch.num);
425 if (!dpn_prop) {
426 dev_err(bus->dev,
427 "Slave Port:%d properties not found", prep_ch.num);
428 return -EINVAL;
429 }
430
431 prep_ch.prepare = prep;
432
433 prep_ch.bank = bus->params.next_bank;
434
435 if (dpn_prop->device_interrupts || !dpn_prop->simple_ch_prep_sm)
436 intr = true;
437
438 /*
439 * Enable interrupt before Port prepare.
440 * For Port de-prepare, it is assumed that port
441 * was prepared earlier
442 */
443 if (prep && intr) {
444 ret = sdw_configure_dpn_intr(s_rt->slave, p_rt->num, prep,
445 dpn_prop->device_interrupts);
446 if (ret < 0)
447 return ret;
448 }
449
450 /* Inform slave about the impending port prepare */
451 sdw_do_port_prep(s_rt, prep_ch, SDW_OPS_PORT_PRE_PREP);
452
453 /* Prepare Slave port implementing CP_SM */
454 if (!dpn_prop->simple_ch_prep_sm) {
455 addr = SDW_DPN_PREPARECTRL(p_rt->num);
456
457 if (prep)
458 ret = sdw_update(s_rt->slave, addr,
459 0xFF, p_rt->ch_mask);
460 else
461 ret = sdw_update(s_rt->slave, addr, 0xFF, 0x0);
462
463 if (ret < 0) {
464 dev_err(&s_rt->slave->dev,
465 "Slave prep_ctrl reg write failed");
466 return ret;
467 }
468
469 /* Wait for completion on port ready */
470 port_ready = &s_rt->slave->port_ready[prep_ch.num];
471 time_left = wait_for_completion_timeout(port_ready,
472 msecs_to_jiffies(dpn_prop->ch_prep_timeout));
473
474 val = sdw_read(s_rt->slave, SDW_DPN_PREPARESTATUS(p_rt->num));
475 val &= p_rt->ch_mask;
476 if (!time_left || val) {
477 dev_err(&s_rt->slave->dev,
478 "Chn prep failed for port:%d", prep_ch.num);
479 return -ETIMEDOUT;
480 }
481 }
482
483 /* Inform slaves about ports prepared */
484 sdw_do_port_prep(s_rt, prep_ch, SDW_OPS_PORT_POST_PREP);
485
486 /* Disable interrupt after Port de-prepare */
487 if (!prep && intr)
488 ret = sdw_configure_dpn_intr(s_rt->slave, p_rt->num, prep,
489 dpn_prop->device_interrupts);
490
491 return ret;
492}
493
494static int sdw_prep_deprep_master_ports(struct sdw_master_runtime *m_rt,
495 struct sdw_port_runtime *p_rt, bool prep)
496{
497 struct sdw_transport_params *t_params = &p_rt->transport_params;
498 struct sdw_bus *bus = m_rt->bus;
499 const struct sdw_master_port_ops *ops = bus->port_ops;
500 struct sdw_prepare_ch prep_ch;
501 int ret = 0;
502
503 prep_ch.num = p_rt->num;
504 prep_ch.ch_mask = p_rt->ch_mask;
505 prep_ch.prepare = prep; /* Prepare/De-prepare */
506 prep_ch.bank = bus->params.next_bank;
507
508 /* Pre-prepare/Pre-deprepare port(s) */
509 if (ops->dpn_port_prep) {
510 ret = ops->dpn_port_prep(bus, &prep_ch);
511 if (ret < 0) {
512 dev_err(bus->dev, "Port prepare failed for port:%d",
513 t_params->port_num);
514 return ret;
515 }
516 }
517
518 return ret;
519}
520
521/**
522 * sdw_prep_deprep_ports() - Prepare/De-prepare port(s) for Master(s) and
523 * Slave(s)
524 *
525 * @m_rt: Master runtime handle
526 * @prep: Prepare or De-prepare
527 */
528static int sdw_prep_deprep_ports(struct sdw_master_runtime *m_rt, bool prep)
529{
530 struct sdw_slave_runtime *s_rt = NULL;
531 struct sdw_port_runtime *p_rt;
532 int ret = 0;
533
534 /* Prepare/De-prepare Slave port(s) */
535 list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
536 list_for_each_entry(p_rt, &s_rt->port_list, port_node) {
537 ret = sdw_prep_deprep_slave_ports(m_rt->bus, s_rt,
538 p_rt, prep);
539 if (ret < 0)
540 return ret;
541 }
542 }
543
544 /* Prepare/De-prepare Master port(s) */
545 list_for_each_entry(p_rt, &m_rt->port_list, port_node) {
546 ret = sdw_prep_deprep_master_ports(m_rt, p_rt, prep);
547 if (ret < 0)
548 return ret;
549 }
550
551 return ret;
552}
553
554/**
555 * sdw_notify_config() - Notify bus configuration
556 *
557 * @m_rt: Master runtime handle
558 *
559 * This function notifies the Master(s) and Slave(s) of the
560 * new bus configuration.
561 */
562static int sdw_notify_config(struct sdw_master_runtime *m_rt)
563{
564 struct sdw_slave_runtime *s_rt;
565 struct sdw_bus *bus = m_rt->bus;
566 struct sdw_slave *slave;
567 int ret = 0;
568
569 if (bus->ops->set_bus_conf) {
570 ret = bus->ops->set_bus_conf(bus, &bus->params);
571 if (ret < 0)
572 return ret;
573 }
574
575 list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
576 slave = s_rt->slave;
577
578 if (slave->ops->bus_config) {
579 ret = slave->ops->bus_config(slave, &bus->params);
580 if (ret < 0)
581 dev_err(bus->dev, "Notify Slave: %d failed",
582 slave->dev_num);
583 return ret;
584 }
585 }
586
587 return ret;
588}
589
590/**
591 * sdw_program_params() - Program transport and port parameters for Master(s)
592 * and Slave(s)
593 *
594 * @bus: SDW bus instance
595 */
596static int sdw_program_params(struct sdw_bus *bus)
597{
598 struct sdw_master_runtime *m_rt = NULL;
599 int ret = 0;
600
601 list_for_each_entry(m_rt, &bus->m_rt_list, bus_node) {
602 ret = sdw_program_port_params(m_rt);
603 if (ret < 0) {
604 dev_err(bus->dev,
605 "Program transport params failed: %d", ret);
606 return ret;
607 }
608
609 ret = sdw_notify_config(m_rt);
610 if (ret < 0) {
611 dev_err(bus->dev, "Notify bus config failed: %d", ret);
612 return ret;
613 }
614
615 /* Enable port(s) on alternate bank for all active streams */
616 if (m_rt->stream->state != SDW_STREAM_ENABLED)
617 continue;
618
619 ret = sdw_enable_disable_ports(m_rt, true);
620 if (ret < 0) {
621 dev_err(bus->dev, "Enable channel failed: %d", ret);
622 return ret;
623 }
624 }
625
626 return ret;
627}
628
629static int sdw_bank_switch(struct sdw_bus *bus)
630{
631 int col_index, row_index;
632 struct sdw_msg *wr_msg;
633 u8 *wbuf = NULL;
634 int ret = 0;
635 u16 addr;
636
637 wr_msg = kzalloc(sizeof(*wr_msg), GFP_KERNEL);
638 if (!wr_msg)
639 return -ENOMEM;
640
641 wbuf = kzalloc(sizeof(*wbuf), GFP_KERNEL);
642 if (!wbuf) {
643 ret = -ENOMEM;
644 goto error_1;
645 }
646
647 /* Get row and column index to program register */
648 col_index = sdw_find_col_index(bus->params.col);
649 row_index = sdw_find_row_index(bus->params.row);
650 wbuf[0] = col_index | (row_index << 3);
651
652 if (bus->params.next_bank)
653 addr = SDW_SCP_FRAMECTRL_B1;
654 else
655 addr = SDW_SCP_FRAMECTRL_B0;
656
657 sdw_fill_msg(wr_msg, NULL, addr, 1, SDW_BROADCAST_DEV_NUM,
658 SDW_MSG_FLAG_WRITE, wbuf);
659 wr_msg->ssp_sync = true;
660
661 ret = sdw_transfer(bus, wr_msg);
662 if (ret < 0) {
663 dev_err(bus->dev, "Slave frame_ctrl reg write failed");
664 goto error;
665 }
666
667 kfree(wr_msg);
668 kfree(wbuf);
669 bus->defer_msg.msg = NULL;
670 bus->params.curr_bank = !bus->params.curr_bank;
671 bus->params.next_bank = !bus->params.next_bank;
672
673 return 0;
674
675error:
676 kfree(wbuf);
677error_1:
678 kfree(wr_msg);
679 return ret;
680}
681
682static int do_bank_switch(struct sdw_stream_runtime *stream)
683{
684 struct sdw_master_runtime *m_rt = stream->m_rt;
685 const struct sdw_master_ops *ops;
686 struct sdw_bus *bus = m_rt->bus;
687 int ret = 0;
688
689 ops = bus->ops;
690
691 /* Pre-bank switch */
692 if (ops->pre_bank_switch) {
693 ret = ops->pre_bank_switch(bus);
694 if (ret < 0) {
695 dev_err(bus->dev, "Pre bank switch op failed: %d", ret);
696 return ret;
697 }
698 }
699
700 /* Bank switch */
701 ret = sdw_bank_switch(bus);
702 if (ret < 0) {
703 dev_err(bus->dev, "Bank switch failed: %d", ret);
704 return ret;
705 }
706
707 /* Post-bank switch */
708 if (ops->post_bank_switch) {
709 ret = ops->post_bank_switch(bus);
710 if (ret < 0) {
711 dev_err(bus->dev,
712 "Post bank switch op failed: %d", ret);
713 }
714 }
715
716 return ret;
717}
718
719/**
720 * sdw_release_stream() - Free the assigned stream runtime
721 *
722 * @stream: SoundWire stream runtime
723 *
724 * sdw_release_stream should be called only once per stream
725 */
726void sdw_release_stream(struct sdw_stream_runtime *stream)
727{
728 kfree(stream);
729}
730EXPORT_SYMBOL(sdw_release_stream);
731
732/**
733 * sdw_alloc_stream() - Allocate and return stream runtime
734 *
735 * @stream_name: SoundWire stream name
736 *
737 * Allocates a SoundWire stream runtime instance.
738 * sdw_alloc_stream should be called only once per stream. Typically
739 * invoked from ALSA/ASoC machine/platform driver.
740 */
741struct sdw_stream_runtime *sdw_alloc_stream(char *stream_name)
742{
743 struct sdw_stream_runtime *stream;
744
745 stream = kzalloc(sizeof(*stream), GFP_KERNEL);
746 if (!stream)
747 return NULL;
748
749 stream->name = stream_name;
750 stream->state = SDW_STREAM_ALLOCATED;
751
752 return stream;
753}
754EXPORT_SYMBOL(sdw_alloc_stream);
755
756/**
757 * sdw_alloc_master_rt() - Allocates and initialize Master runtime handle
758 *
759 * @bus: SDW bus instance
760 * @stream_config: Stream configuration
761 * @stream: Stream runtime handle.
762 *
763 * This function is to be called with bus_lock held.
764 */
765static struct sdw_master_runtime
766*sdw_alloc_master_rt(struct sdw_bus *bus,
767 struct sdw_stream_config *stream_config,
768 struct sdw_stream_runtime *stream)
769{
770 struct sdw_master_runtime *m_rt;
771
772 m_rt = stream->m_rt;
773
774 /*
775 * check if Master is already allocated (as a result of Slave adding
776 * it first), if so skip allocation and go to configure
777 */
778 if (m_rt)
779 goto stream_config;
780
781 m_rt = kzalloc(sizeof(*m_rt), GFP_KERNEL);
782 if (!m_rt)
783 return NULL;
784
785 /* Initialization of Master runtime handle */
786 INIT_LIST_HEAD(&m_rt->port_list);
787 INIT_LIST_HEAD(&m_rt->slave_rt_list);
788 stream->m_rt = m_rt;
789
790 list_add_tail(&m_rt->bus_node, &bus->m_rt_list);
791
792stream_config:
793 m_rt->ch_count = stream_config->ch_count;
794 m_rt->bus = bus;
795 m_rt->stream = stream;
796 m_rt->direction = stream_config->direction;
797
798 return m_rt;
799}
800
801/**
802 * sdw_alloc_slave_rt() - Allocate and initialize Slave runtime handle.
803 *
804 * @slave: Slave handle
805 * @stream_config: Stream configuration
806 * @stream: Stream runtime handle
807 *
808 * This function is to be called with bus_lock held.
809 */
810static struct sdw_slave_runtime
811*sdw_alloc_slave_rt(struct sdw_slave *slave,
812 struct sdw_stream_config *stream_config,
813 struct sdw_stream_runtime *stream)
814{
815 struct sdw_slave_runtime *s_rt = NULL;
816
817 s_rt = kzalloc(sizeof(*s_rt), GFP_KERNEL);
818 if (!s_rt)
819 return NULL;
820
821 INIT_LIST_HEAD(&s_rt->port_list);
822 s_rt->ch_count = stream_config->ch_count;
823 s_rt->direction = stream_config->direction;
824 s_rt->slave = slave;
825
826 return s_rt;
827}
828
829static void sdw_master_port_release(struct sdw_bus *bus,
830 struct sdw_master_runtime *m_rt)
831{
832 struct sdw_port_runtime *p_rt, *_p_rt;
833
834 list_for_each_entry_safe(p_rt, _p_rt,
835 &m_rt->port_list, port_node) {
836 list_del(&p_rt->port_node);
837 kfree(p_rt);
838 }
839}
840
841static void sdw_slave_port_release(struct sdw_bus *bus,
842 struct sdw_slave *slave,
843 struct sdw_stream_runtime *stream)
844{
845 struct sdw_port_runtime *p_rt, *_p_rt;
846 struct sdw_master_runtime *m_rt = stream->m_rt;
847 struct sdw_slave_runtime *s_rt;
848
849 list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
850 if (s_rt->slave != slave)
851 continue;
852
853 list_for_each_entry_safe(p_rt, _p_rt,
854 &s_rt->port_list, port_node) {
855 list_del(&p_rt->port_node);
856 kfree(p_rt);
857 }
858 }
859}
860
861/**
862 * sdw_release_slave_stream() - Free Slave(s) runtime handle
863 *
864 * @slave: Slave handle.
865 * @stream: Stream runtime handle.
866 *
867 * This function is to be called with bus_lock held.
868 */
869static void sdw_release_slave_stream(struct sdw_slave *slave,
870 struct sdw_stream_runtime *stream)
871{
872 struct sdw_slave_runtime *s_rt, *_s_rt;
873 struct sdw_master_runtime *m_rt = stream->m_rt;
874
875 /* Retrieve Slave runtime handle */
876 list_for_each_entry_safe(s_rt, _s_rt,
877 &m_rt->slave_rt_list, m_rt_node) {
878
879 if (s_rt->slave == slave) {
880 list_del(&s_rt->m_rt_node);
881 kfree(s_rt);
882 return;
883 }
884 }
885}
886
887/**
888 * sdw_release_master_stream() - Free Master runtime handle
889 *
890 * @stream: Stream runtime handle.
891 *
892 * This function is to be called with bus_lock held
893 * It frees the Master runtime handle and associated Slave(s) runtime
894 * handle. If this is called first then sdw_release_slave_stream() will have
895 * no effect as Slave(s) runtime handle would already be freed up.
896 */
897static void sdw_release_master_stream(struct sdw_stream_runtime *stream)
898{
899 struct sdw_master_runtime *m_rt = stream->m_rt;
900 struct sdw_slave_runtime *s_rt, *_s_rt;
901
902 list_for_each_entry_safe(s_rt, _s_rt,
903 &m_rt->slave_rt_list, m_rt_node)
904 sdw_stream_remove_slave(s_rt->slave, stream);
905
906 list_del(&m_rt->bus_node);
907}
908
909/**
910 * sdw_stream_remove_master() - Remove master from sdw_stream
911 *
912 * @bus: SDW Bus instance
913 * @stream: SoundWire stream
914 *
915 * This removes and frees port_rt and master_rt from a stream
916 */
917int sdw_stream_remove_master(struct sdw_bus *bus,
918 struct sdw_stream_runtime *stream)
919{
920 mutex_lock(&bus->bus_lock);
921
922 sdw_release_master_stream(stream);
923 sdw_master_port_release(bus, stream->m_rt);
924 stream->state = SDW_STREAM_RELEASED;
925 kfree(stream->m_rt);
926 stream->m_rt = NULL;
927
928 mutex_unlock(&bus->bus_lock);
929
930 return 0;
931}
932EXPORT_SYMBOL(sdw_stream_remove_master);
933
934/**
935 * sdw_stream_remove_slave() - Remove slave from sdw_stream
936 *
937 * @slave: SDW Slave instance
938 * @stream: SoundWire stream
939 *
940 * This removes and frees port_rt and slave_rt from a stream
941 */
942int sdw_stream_remove_slave(struct sdw_slave *slave,
943 struct sdw_stream_runtime *stream)
944{
945 mutex_lock(&slave->bus->bus_lock);
946
947 sdw_slave_port_release(slave->bus, slave, stream);
948 sdw_release_slave_stream(slave, stream);
949
950 mutex_unlock(&slave->bus->bus_lock);
951
952 return 0;
953}
954EXPORT_SYMBOL(sdw_stream_remove_slave);
955
956/**
957 * sdw_config_stream() - Configure the allocated stream
958 *
959 * @dev: SDW device
960 * @stream: SoundWire stream
961 * @stream_config: Stream configuration for audio stream
962 * @is_slave: is API called from Slave or Master
963 *
964 * This function is to be called with bus_lock held.
965 */
966static int sdw_config_stream(struct device *dev,
967 struct sdw_stream_runtime *stream,
968 struct sdw_stream_config *stream_config, bool is_slave)
969{
970 /*
971 * Update the stream rate, channel and bps based on data
972 * source. For more than one data source (multilink),
973 * match the rate, bps, stream type and increment number of channels.
974 *
975 * If rate/bps is zero, it means the values are not set, so skip
976 * comparison and allow the value to be set and stored in stream
977 */
978 if (stream->params.rate &&
979 stream->params.rate != stream_config->frame_rate) {
980 dev_err(dev, "rate not matching, stream:%s", stream->name);
981 return -EINVAL;
982 }
983
984 if (stream->params.bps &&
985 stream->params.bps != stream_config->bps) {
986 dev_err(dev, "bps not matching, stream:%s", stream->name);
987 return -EINVAL;
988 }
989
990 stream->type = stream_config->type;
991 stream->params.rate = stream_config->frame_rate;
992 stream->params.bps = stream_config->bps;
993
994 /* TODO: Update this check during Device-device support */
995 if (is_slave)
996 stream->params.ch_count += stream_config->ch_count;
997
998 return 0;
999}
1000
1001static int sdw_is_valid_port_range(struct device *dev,
1002 struct sdw_port_runtime *p_rt)
1003{
1004 if (!SDW_VALID_PORT_RANGE(p_rt->num)) {
1005 dev_err(dev,
1006 "SoundWire: Invalid port number :%d", p_rt->num);
1007 return -EINVAL;
1008 }
1009
1010 return 0;
1011}
1012
1013static struct sdw_port_runtime *sdw_port_alloc(struct device *dev,
1014 struct sdw_port_config *port_config,
1015 int port_index)
1016{
1017 struct sdw_port_runtime *p_rt;
1018
1019 p_rt = kzalloc(sizeof(*p_rt), GFP_KERNEL);
1020 if (!p_rt)
1021 return NULL;
1022
1023 p_rt->ch_mask = port_config[port_index].ch_mask;
1024 p_rt->num = port_config[port_index].num;
1025
1026 return p_rt;
1027}
1028
1029static int sdw_master_port_config(struct sdw_bus *bus,
1030 struct sdw_master_runtime *m_rt,
1031 struct sdw_port_config *port_config,
1032 unsigned int num_ports)
1033{
1034 struct sdw_port_runtime *p_rt;
1035 int i;
1036
1037 /* Iterate for number of ports to perform initialization */
1038 for (i = 0; i < num_ports; i++) {
1039 p_rt = sdw_port_alloc(bus->dev, port_config, i);
1040 if (!p_rt)
1041 return -ENOMEM;
1042
1043 /*
1044 * TODO: Check port capabilities for requested
1045 * configuration (audio mode support)
1046 */
1047
1048 list_add_tail(&p_rt->port_node, &m_rt->port_list);
1049 }
1050
1051 return 0;
1052}
1053
1054static int sdw_slave_port_config(struct sdw_slave *slave,
1055 struct sdw_slave_runtime *s_rt,
1056 struct sdw_port_config *port_config,
1057 unsigned int num_config)
1058{
1059 struct sdw_port_runtime *p_rt;
1060 int i, ret;
1061
1062 /* Iterate for number of ports to perform initialization */
1063 for (i = 0; i < num_config; i++) {
1064 p_rt = sdw_port_alloc(&slave->dev, port_config, i);
1065 if (!p_rt)
1066 return -ENOMEM;
1067
1068 /*
1069 * TODO: Check valid port range as defined by DisCo/
1070 * slave
1071 */
1072 ret = sdw_is_valid_port_range(&slave->dev, p_rt);
1073 if (ret < 0) {
1074 kfree(p_rt);
1075 return ret;
1076 }
1077
1078 /*
1079 * TODO: Check port capabilities for requested
1080 * configuration (audio mode support)
1081 */
1082
1083 list_add_tail(&p_rt->port_node, &s_rt->port_list);
1084 }
1085
1086 return 0;
1087}
1088
1089/**
1090 * sdw_stream_add_master() - Allocate and add master runtime to a stream
1091 *
1092 * @bus: SDW Bus instance
1093 * @stream_config: Stream configuration for audio stream
1094 * @port_config: Port configuration for audio stream
1095 * @num_ports: Number of ports
1096 * @stream: SoundWire stream
1097 */
1098int sdw_stream_add_master(struct sdw_bus *bus,
1099 struct sdw_stream_config *stream_config,
1100 struct sdw_port_config *port_config,
1101 unsigned int num_ports,
1102 struct sdw_stream_runtime *stream)
1103{
1104 struct sdw_master_runtime *m_rt = NULL;
1105 int ret;
1106
1107 mutex_lock(&bus->bus_lock);
1108
1109 m_rt = sdw_alloc_master_rt(bus, stream_config, stream);
1110 if (!m_rt) {
1111 dev_err(bus->dev,
1112 "Master runtime config failed for stream:%s",
1113 stream->name);
1114 ret = -ENOMEM;
1115 goto error;
1116 }
1117
1118 ret = sdw_config_stream(bus->dev, stream, stream_config, false);
1119 if (ret)
1120 goto stream_error;
1121
1122 ret = sdw_master_port_config(bus, m_rt, port_config, num_ports);
1123 if (ret)
1124 goto stream_error;
1125
1126 stream->state = SDW_STREAM_CONFIGURED;
1127
1128stream_error:
1129 sdw_release_master_stream(stream);
1130error:
1131 mutex_unlock(&bus->bus_lock);
1132 return ret;
1133}
1134EXPORT_SYMBOL(sdw_stream_add_master);
1135
1136/**
1137 * sdw_stream_add_slave() - Allocate and add master/slave runtime to a stream
1138 *
1139 * @slave: SDW Slave instance
1140 * @stream_config: Stream configuration for audio stream
1141 * @stream: SoundWire stream
1142 * @port_config: Port configuration for audio stream
1143 * @num_ports: Number of ports
1144 */
1145int sdw_stream_add_slave(struct sdw_slave *slave,
1146 struct sdw_stream_config *stream_config,
1147 struct sdw_port_config *port_config,
1148 unsigned int num_ports,
1149 struct sdw_stream_runtime *stream)
1150{
1151 struct sdw_slave_runtime *s_rt;
1152 struct sdw_master_runtime *m_rt;
1153 int ret;
1154
1155 mutex_lock(&slave->bus->bus_lock);
1156
1157 /*
1158 * If this API is invoked by Slave first then m_rt is not valid.
1159 * So, allocate m_rt and add Slave to it.
1160 */
1161 m_rt = sdw_alloc_master_rt(slave->bus, stream_config, stream);
1162 if (!m_rt) {
1163 dev_err(&slave->dev,
1164 "alloc master runtime failed for stream:%s",
1165 stream->name);
1166 ret = -ENOMEM;
1167 goto error;
1168 }
1169
1170 s_rt = sdw_alloc_slave_rt(slave, stream_config, stream);
1171 if (!s_rt) {
1172 dev_err(&slave->dev,
1173 "Slave runtime config failed for stream:%s",
1174 stream->name);
1175 ret = -ENOMEM;
1176 goto stream_error;
1177 }
1178
1179 ret = sdw_config_stream(&slave->dev, stream, stream_config, true);
1180 if (ret)
1181 goto stream_error;
1182
1183 list_add_tail(&s_rt->m_rt_node, &m_rt->slave_rt_list);
1184
1185 ret = sdw_slave_port_config(slave, s_rt, port_config, num_ports);
1186 if (ret)
1187 goto stream_error;
1188
1189 stream->state = SDW_STREAM_CONFIGURED;
1190 goto error;
1191
1192stream_error:
1193 /*
1194 * we hit error so cleanup the stream, release all Slave(s) and
1195 * Master runtime
1196 */
1197 sdw_release_master_stream(stream);
1198error:
1199 mutex_unlock(&slave->bus->bus_lock);
1200 return ret;
1201}
1202EXPORT_SYMBOL(sdw_stream_add_slave);
1203
1204/**
1205 * sdw_get_slave_dpn_prop() - Get Slave port capabilities
1206 *
1207 * @slave: Slave handle
1208 * @direction: Data direction.
1209 * @port_num: Port number
1210 */
1211struct sdw_dpn_prop *sdw_get_slave_dpn_prop(struct sdw_slave *slave,
1212 enum sdw_data_direction direction,
1213 unsigned int port_num)
1214{
1215 struct sdw_dpn_prop *dpn_prop;
1216 u8 num_ports;
1217 int i;
1218
1219 if (direction == SDW_DATA_DIR_TX) {
1220 num_ports = hweight32(slave->prop.source_ports);
1221 dpn_prop = slave->prop.src_dpn_prop;
1222 } else {
1223 num_ports = hweight32(slave->prop.sink_ports);
1224 dpn_prop = slave->prop.sink_dpn_prop;
1225 }
1226
1227 for (i = 0; i < num_ports; i++) {
1228 dpn_prop = &dpn_prop[i];
1229
1230 if (dpn_prop->num == port_num)
1231 return &dpn_prop[i];
1232 }
1233
1234 return NULL;
1235}
1236
1237static int _sdw_prepare_stream(struct sdw_stream_runtime *stream)
1238{
1239 struct sdw_master_runtime *m_rt = stream->m_rt;
1240 struct sdw_bus *bus = m_rt->bus;
1241 struct sdw_master_prop *prop = NULL;
1242 struct sdw_bus_params params;
1243 int ret;
1244
1245 prop = &bus->prop;
1246 memcpy(&params, &bus->params, sizeof(params));
1247
1248 /* TODO: Support Asynchronous mode */
1249 if ((prop->max_freq % stream->params.rate) != 0) {
1250 dev_err(bus->dev, "Async mode not supported");
1251 return -EINVAL;
1252 }
1253
1254 /* Increment cumulative bus bandwidth */
1255 /* TODO: Update this during Device-Device support */
1256 bus->params.bandwidth += m_rt->stream->params.rate *
1257 m_rt->ch_count * m_rt->stream->params.bps;
1258
1259 /* Program params */
1260 ret = sdw_program_params(bus);
1261 if (ret < 0) {
1262 dev_err(bus->dev, "Program params failed: %d", ret);
1263 goto restore_params;
1264 }
1265
1266 ret = do_bank_switch(stream);
1267 if (ret < 0) {
1268 dev_err(bus->dev, "Bank switch failed: %d", ret);
1269 goto restore_params;
1270 }
1271
1272 /* Prepare port(s) on the new clock configuration */
1273 ret = sdw_prep_deprep_ports(m_rt, true);
1274 if (ret < 0) {
1275 dev_err(bus->dev, "Prepare port(s) failed ret = %d",
1276 ret);
1277 return ret;
1278 }
1279
1280 stream->state = SDW_STREAM_PREPARED;
1281
1282 return ret;
1283
1284restore_params:
1285 memcpy(&bus->params, &params, sizeof(params));
1286 return ret;
1287}
1288
1289/**
1290 * sdw_prepare_stream() - Prepare SoundWire stream
1291 *
1292 * @stream: Soundwire stream
1293 *
1294 * Documentation/soundwire/stream.txt explains this API in detail
1295 */
1296int sdw_prepare_stream(struct sdw_stream_runtime *stream)
1297{
1298 int ret = 0;
1299
1300 if (!stream) {
1301 pr_err("SoundWire: Handle not found for stream");
1302 return -EINVAL;
1303 }
1304
1305 mutex_lock(&stream->m_rt->bus->bus_lock);
1306
1307 ret = _sdw_prepare_stream(stream);
1308 if (ret < 0)
1309 pr_err("Prepare for stream:%s failed: %d", stream->name, ret);
1310
1311 mutex_unlock(&stream->m_rt->bus->bus_lock);
1312 return ret;
1313}
1314EXPORT_SYMBOL(sdw_prepare_stream);
1315
1316static int _sdw_enable_stream(struct sdw_stream_runtime *stream)
1317{
1318 struct sdw_master_runtime *m_rt = stream->m_rt;
1319 struct sdw_bus *bus = m_rt->bus;
1320 int ret;
1321
1322 /* Program params */
1323 ret = sdw_program_params(bus);
1324 if (ret < 0) {
1325 dev_err(bus->dev, "Program params failed: %d", ret);
1326 return ret;
1327 }
1328
1329 /* Enable port(s) */
1330 ret = sdw_enable_disable_ports(m_rt, true);
1331 if (ret < 0) {
1332 dev_err(bus->dev, "Enable port(s) failed ret: %d", ret);
1333 return ret;
1334 }
1335
1336 ret = do_bank_switch(stream);
1337 if (ret < 0) {
1338 dev_err(bus->dev, "Bank switch failed: %d", ret);
1339 return ret;
1340 }
1341
1342 stream->state = SDW_STREAM_ENABLED;
1343 return 0;
1344}
1345
1346/**
1347 * sdw_enable_stream() - Enable SoundWire stream
1348 *
1349 * @stream: Soundwire stream
1350 *
1351 * Documentation/soundwire/stream.txt explains this API in detail
1352 */
1353int sdw_enable_stream(struct sdw_stream_runtime *stream)
1354{
1355 int ret = 0;
1356
1357 if (!stream) {
1358 pr_err("SoundWire: Handle not found for stream");
1359 return -EINVAL;
1360 }
1361
1362 mutex_lock(&stream->m_rt->bus->bus_lock);
1363
1364 ret = _sdw_enable_stream(stream);
1365 if (ret < 0)
1366 pr_err("Enable for stream:%s failed: %d", stream->name, ret);
1367
1368 mutex_unlock(&stream->m_rt->bus->bus_lock);
1369 return ret;
1370}
1371EXPORT_SYMBOL(sdw_enable_stream);
1372
1373static int _sdw_disable_stream(struct sdw_stream_runtime *stream)
1374{
1375 struct sdw_master_runtime *m_rt = stream->m_rt;
1376 struct sdw_bus *bus = m_rt->bus;
1377 int ret;
1378
1379 /* Disable port(s) */
1380 ret = sdw_enable_disable_ports(m_rt, false);
1381 if (ret < 0) {
1382 dev_err(bus->dev, "Disable port(s) failed: %d", ret);
1383 return ret;
1384 }
1385
1386 stream->state = SDW_STREAM_DISABLED;
1387
1388 /* Program params */
1389 ret = sdw_program_params(bus);
1390 if (ret < 0) {
1391 dev_err(bus->dev, "Program params failed: %d", ret);
1392 return ret;
1393 }
1394
1395 return do_bank_switch(stream);
1396}
1397
1398/**
1399 * sdw_disable_stream() - Disable SoundWire stream
1400 *
1401 * @stream: Soundwire stream
1402 *
1403 * Documentation/soundwire/stream.txt explains this API in detail
1404 */
1405int sdw_disable_stream(struct sdw_stream_runtime *stream)
1406{
1407 int ret = 0;
1408
1409 if (!stream) {
1410 pr_err("SoundWire: Handle not found for stream");
1411 return -EINVAL;
1412 }
1413
1414 mutex_lock(&stream->m_rt->bus->bus_lock);
1415
1416 ret = _sdw_disable_stream(stream);
1417 if (ret < 0)
1418 pr_err("Disable for stream:%s failed: %d", stream->name, ret);
1419
1420 mutex_unlock(&stream->m_rt->bus->bus_lock);
1421 return ret;
1422}
1423EXPORT_SYMBOL(sdw_disable_stream);
1424
1425static int _sdw_deprepare_stream(struct sdw_stream_runtime *stream)
1426{
1427 struct sdw_master_runtime *m_rt = stream->m_rt;
1428 struct sdw_bus *bus = m_rt->bus;
1429 int ret = 0;
1430
1431 /* De-prepare port(s) */
1432 ret = sdw_prep_deprep_ports(m_rt, false);
1433 if (ret < 0) {
1434 dev_err(bus->dev, "De-prepare port(s) failed: %d", ret);
1435 return ret;
1436 }
1437
1438 stream->state = SDW_STREAM_DEPREPARED;
1439
1440 /* TODO: Update this during Device-Device support */
1441 bus->params.bandwidth -= m_rt->stream->params.rate *
1442 m_rt->ch_count * m_rt->stream->params.bps;
1443
1444 /* Program params */
1445 ret = sdw_program_params(bus);
1446 if (ret < 0) {
1447 dev_err(bus->dev, "Program params failed: %d", ret);
1448 return ret;
1449 }
1450
1451 return do_bank_switch(stream);
1452}
1453
1454/**
1455 * sdw_deprepare_stream() - Deprepare SoundWire stream
1456 *
1457 * @stream: Soundwire stream
1458 *
1459 * Documentation/soundwire/stream.txt explains this API in detail
1460 */
1461int sdw_deprepare_stream(struct sdw_stream_runtime *stream)
1462{
1463 int ret = 0;
1464
1465 if (!stream) {
1466 pr_err("SoundWire: Handle not found for stream");
1467 return -EINVAL;
1468 }
1469
1470 mutex_lock(&stream->m_rt->bus->bus_lock);
1471
1472 ret = _sdw_deprepare_stream(stream);
1473 if (ret < 0)
1474 pr_err("De-prepare for stream:%d failed: %d", ret, ret);
1475
1476 mutex_unlock(&stream->m_rt->bus->bus_lock);
1477 return ret;
1478}
1479EXPORT_SYMBOL(sdw_deprepare_stream);
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-25 10:12:42 -0400