1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
2 // Copyright(c) 2015-18 Intel Corporation.
5 * stream.c - SoundWire Bus stream operations.
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 <sound/soc.h>
20 * Array of supported rows and columns as per MIPI SoundWire Specification 1.1
22 * The rows are arranged as per the array index value programmed
23 * in register. The index 15 has dummy value 0 in order to fill hole.
25 int sdw_rows
[SDW_FRAME_ROWS
] = {48, 50, 60, 64, 75, 80, 125, 147,
26 96, 100, 120, 128, 150, 160, 250, 0,
27 192, 200, 240, 256, 72, 144, 90, 180};
28 EXPORT_SYMBOL(sdw_rows
);
30 int sdw_cols
[SDW_FRAME_COLS
] = {2, 4, 6, 8, 10, 12, 14, 16};
31 EXPORT_SYMBOL(sdw_cols
);
33 int sdw_find_col_index(int col
)
37 for (i
= 0; i
< SDW_FRAME_COLS
; i
++) {
38 if (sdw_cols
[i
] == col
)
42 pr_warn("Requested column not found, selecting lowest column no: 2\n");
45 EXPORT_SYMBOL(sdw_find_col_index
);
47 int sdw_find_row_index(int row
)
51 for (i
= 0; i
< SDW_FRAME_ROWS
; i
++) {
52 if (sdw_rows
[i
] == row
)
56 pr_warn("Requested row not found, selecting lowest row no: 48\n");
59 EXPORT_SYMBOL(sdw_find_row_index
);
61 static int _sdw_program_slave_port_params(struct sdw_bus
*bus
,
62 struct sdw_slave
*slave
,
63 struct sdw_transport_params
*t_params
,
64 enum sdw_dpn_type type
)
66 u32 addr1
, addr2
, addr3
, addr4
;
70 if (bus
->params
.next_bank
) {
71 addr1
= SDW_DPN_OFFSETCTRL2_B1(t_params
->port_num
);
72 addr2
= SDW_DPN_BLOCKCTRL3_B1(t_params
->port_num
);
73 addr3
= SDW_DPN_SAMPLECTRL2_B1(t_params
->port_num
);
74 addr4
= SDW_DPN_HCTRL_B1(t_params
->port_num
);
76 addr1
= SDW_DPN_OFFSETCTRL2_B0(t_params
->port_num
);
77 addr2
= SDW_DPN_BLOCKCTRL3_B0(t_params
->port_num
);
78 addr3
= SDW_DPN_SAMPLECTRL2_B0(t_params
->port_num
);
79 addr4
= SDW_DPN_HCTRL_B0(t_params
->port_num
);
82 /* Program DPN_OffsetCtrl2 registers */
83 ret
= sdw_write(slave
, addr1
, t_params
->offset2
);
85 dev_err(bus
->dev
, "DPN_OffsetCtrl2 register write failed\n");
89 /* Program DPN_BlockCtrl3 register */
90 ret
= sdw_write(slave
, addr2
, t_params
->blk_pkg_mode
);
92 dev_err(bus
->dev
, "DPN_BlockCtrl3 register write failed\n");
97 * Data ports are FULL, SIMPLE and REDUCED. This function handles
98 * FULL and REDUCED only and beyond this point only FULL is
99 * handled, so bail out if we are not FULL data port type
101 if (type
!= SDW_DPN_FULL
)
104 /* Program DPN_SampleCtrl2 register */
105 wbuf
= FIELD_GET(SDW_DPN_SAMPLECTRL_HIGH
, t_params
->sample_interval
- 1);
107 ret
= sdw_write(slave
, addr3
, wbuf
);
109 dev_err(bus
->dev
, "DPN_SampleCtrl2 register write failed\n");
113 /* Program DPN_HCtrl register */
114 wbuf
= FIELD_PREP(SDW_DPN_HCTRL_HSTART
, t_params
->hstart
);
115 wbuf
|= FIELD_PREP(SDW_DPN_HCTRL_HSTOP
, t_params
->hstop
);
117 ret
= sdw_write(slave
, addr4
, wbuf
);
119 dev_err(bus
->dev
, "DPN_HCtrl register write failed\n");
124 static int sdw_program_slave_port_params(struct sdw_bus
*bus
,
125 struct sdw_slave_runtime
*s_rt
,
126 struct sdw_port_runtime
*p_rt
)
128 struct sdw_transport_params
*t_params
= &p_rt
->transport_params
;
129 struct sdw_port_params
*p_params
= &p_rt
->port_params
;
130 struct sdw_slave_prop
*slave_prop
= &s_rt
->slave
->prop
;
131 u32 addr1
, addr2
, addr3
, addr4
, addr5
, addr6
;
132 struct sdw_dpn_prop
*dpn_prop
;
136 dpn_prop
= sdw_get_slave_dpn_prop(s_rt
->slave
,
142 addr1
= SDW_DPN_PORTCTRL(t_params
->port_num
);
143 addr2
= SDW_DPN_BLOCKCTRL1(t_params
->port_num
);
145 if (bus
->params
.next_bank
) {
146 addr3
= SDW_DPN_SAMPLECTRL1_B1(t_params
->port_num
);
147 addr4
= SDW_DPN_OFFSETCTRL1_B1(t_params
->port_num
);
148 addr5
= SDW_DPN_BLOCKCTRL2_B1(t_params
->port_num
);
149 addr6
= SDW_DPN_LANECTRL_B1(t_params
->port_num
);
152 addr3
= SDW_DPN_SAMPLECTRL1_B0(t_params
->port_num
);
153 addr4
= SDW_DPN_OFFSETCTRL1_B0(t_params
->port_num
);
154 addr5
= SDW_DPN_BLOCKCTRL2_B0(t_params
->port_num
);
155 addr6
= SDW_DPN_LANECTRL_B0(t_params
->port_num
);
158 /* Program DPN_PortCtrl register */
159 wbuf
= FIELD_PREP(SDW_DPN_PORTCTRL_DATAMODE
, p_params
->data_mode
);
160 wbuf
|= FIELD_PREP(SDW_DPN_PORTCTRL_FLOWMODE
, p_params
->flow_mode
);
162 ret
= sdw_update(s_rt
->slave
, addr1
, 0xF, wbuf
);
164 dev_err(&s_rt
->slave
->dev
,
165 "DPN_PortCtrl register write failed for port %d\n",
170 if (!dpn_prop
->read_only_wordlength
) {
171 /* Program DPN_BlockCtrl1 register */
172 ret
= sdw_write(s_rt
->slave
, addr2
, (p_params
->bps
- 1));
174 dev_err(&s_rt
->slave
->dev
,
175 "DPN_BlockCtrl1 register write failed for port %d\n",
181 /* Program DPN_SampleCtrl1 register */
182 wbuf
= (t_params
->sample_interval
- 1) & SDW_DPN_SAMPLECTRL_LOW
;
183 ret
= sdw_write(s_rt
->slave
, addr3
, wbuf
);
185 dev_err(&s_rt
->slave
->dev
,
186 "DPN_SampleCtrl1 register write failed for port %d\n",
191 /* Program DPN_OffsetCtrl1 registers */
192 ret
= sdw_write(s_rt
->slave
, addr4
, t_params
->offset1
);
194 dev_err(&s_rt
->slave
->dev
,
195 "DPN_OffsetCtrl1 register write failed for port %d\n",
200 /* Program DPN_BlockCtrl2 register*/
201 if (t_params
->blk_grp_ctrl_valid
) {
202 ret
= sdw_write(s_rt
->slave
, addr5
, t_params
->blk_grp_ctrl
);
204 dev_err(&s_rt
->slave
->dev
,
205 "DPN_BlockCtrl2 reg write failed for port %d\n",
211 /* program DPN_LaneCtrl register */
212 if (slave_prop
->lane_control_support
) {
213 ret
= sdw_write(s_rt
->slave
, addr6
, t_params
->lane_ctrl
);
215 dev_err(&s_rt
->slave
->dev
,
216 "DPN_LaneCtrl register write failed for port %d\n",
222 if (dpn_prop
->type
!= SDW_DPN_SIMPLE
) {
223 ret
= _sdw_program_slave_port_params(bus
, s_rt
->slave
,
224 t_params
, dpn_prop
->type
);
226 dev_err(&s_rt
->slave
->dev
,
227 "Transport reg write failed for port: %d\n",
234 static int sdw_program_master_port_params(struct sdw_bus
*bus
,
235 struct sdw_port_runtime
*p_rt
)
240 * we need to set transport and port parameters for the port.
241 * Transport parameters refers to the sample interval, offsets and
242 * hstart/stop etc of the data. Port parameters refers to word
243 * length, flow mode etc of the port
245 ret
= bus
->port_ops
->dpn_set_port_transport_params(bus
,
246 &p_rt
->transport_params
,
247 bus
->params
.next_bank
);
251 return bus
->port_ops
->dpn_set_port_params(bus
,
253 bus
->params
.next_bank
);
257 * sdw_program_port_params() - Programs transport parameters of Master(s)
260 * @m_rt: Master stream runtime
262 static int sdw_program_port_params(struct sdw_master_runtime
*m_rt
)
264 struct sdw_slave_runtime
*s_rt
= NULL
;
265 struct sdw_bus
*bus
= m_rt
->bus
;
266 struct sdw_port_runtime
*p_rt
;
269 /* Program transport & port parameters for Slave(s) */
270 list_for_each_entry(s_rt
, &m_rt
->slave_rt_list
, m_rt_node
) {
271 list_for_each_entry(p_rt
, &s_rt
->port_list
, port_node
) {
272 ret
= sdw_program_slave_port_params(bus
, s_rt
, p_rt
);
278 /* Program transport & port parameters for Master(s) */
279 list_for_each_entry(p_rt
, &m_rt
->port_list
, port_node
) {
280 ret
= sdw_program_master_port_params(bus
, p_rt
);
289 * sdw_enable_disable_slave_ports: Enable/disable slave data port
292 * @s_rt: slave runtime
293 * @p_rt: port runtime
294 * @en: enable or disable operation
296 * This function only sets the enable/disable bits in the relevant bank, the
297 * actual enable/disable is done with a bank switch
299 static int sdw_enable_disable_slave_ports(struct sdw_bus
*bus
,
300 struct sdw_slave_runtime
*s_rt
,
301 struct sdw_port_runtime
*p_rt
,
304 struct sdw_transport_params
*t_params
= &p_rt
->transport_params
;
308 if (bus
->params
.next_bank
)
309 addr
= SDW_DPN_CHANNELEN_B1(p_rt
->num
);
311 addr
= SDW_DPN_CHANNELEN_B0(p_rt
->num
);
314 * Since bus doesn't support sharing a port across two streams,
315 * it is safe to reset this register
318 ret
= sdw_write(s_rt
->slave
, addr
, p_rt
->ch_mask
);
320 ret
= sdw_write(s_rt
->slave
, addr
, 0x0);
323 dev_err(&s_rt
->slave
->dev
,
324 "Slave chn_en reg write failed:%d port:%d\n",
325 ret
, t_params
->port_num
);
330 static int sdw_enable_disable_master_ports(struct sdw_master_runtime
*m_rt
,
331 struct sdw_port_runtime
*p_rt
,
334 struct sdw_transport_params
*t_params
= &p_rt
->transport_params
;
335 struct sdw_bus
*bus
= m_rt
->bus
;
336 struct sdw_enable_ch enable_ch
;
339 enable_ch
.port_num
= p_rt
->num
;
340 enable_ch
.ch_mask
= p_rt
->ch_mask
;
341 enable_ch
.enable
= en
;
343 /* Perform Master port channel(s) enable/disable */
344 if (bus
->port_ops
->dpn_port_enable_ch
) {
345 ret
= bus
->port_ops
->dpn_port_enable_ch(bus
,
347 bus
->params
.next_bank
);
350 "Master chn_en write failed:%d port:%d\n",
351 ret
, t_params
->port_num
);
356 "dpn_port_enable_ch not supported, %s failed\n",
357 en
? "enable" : "disable");
365 * sdw_enable_disable_ports() - Enable/disable port(s) for Master and
368 * @m_rt: Master stream runtime
369 * @en: mode (enable/disable)
371 static int sdw_enable_disable_ports(struct sdw_master_runtime
*m_rt
, bool en
)
373 struct sdw_port_runtime
*s_port
, *m_port
;
374 struct sdw_slave_runtime
*s_rt
;
377 /* Enable/Disable Slave port(s) */
378 list_for_each_entry(s_rt
, &m_rt
->slave_rt_list
, m_rt_node
) {
379 list_for_each_entry(s_port
, &s_rt
->port_list
, port_node
) {
380 ret
= sdw_enable_disable_slave_ports(m_rt
->bus
, s_rt
,
387 /* Enable/Disable Master port(s) */
388 list_for_each_entry(m_port
, &m_rt
->port_list
, port_node
) {
389 ret
= sdw_enable_disable_master_ports(m_rt
, m_port
, en
);
397 static int sdw_do_port_prep(struct sdw_slave_runtime
*s_rt
,
398 struct sdw_prepare_ch prep_ch
,
399 enum sdw_port_prep_ops cmd
)
401 const struct sdw_slave_ops
*ops
= s_rt
->slave
->ops
;
404 if (ops
->port_prep
) {
405 ret
= ops
->port_prep(s_rt
->slave
, &prep_ch
, cmd
);
407 dev_err(&s_rt
->slave
->dev
,
408 "Slave Port Prep cmd %d failed: %d\n",
417 static int sdw_prep_deprep_slave_ports(struct sdw_bus
*bus
,
418 struct sdw_slave_runtime
*s_rt
,
419 struct sdw_port_runtime
*p_rt
,
422 struct completion
*port_ready
;
423 struct sdw_dpn_prop
*dpn_prop
;
424 struct sdw_prepare_ch prep_ch
;
429 prep_ch
.num
= p_rt
->num
;
430 prep_ch
.ch_mask
= p_rt
->ch_mask
;
432 dpn_prop
= sdw_get_slave_dpn_prop(s_rt
->slave
,
437 "Slave Port:%d properties not found\n", prep_ch
.num
);
441 prep_ch
.prepare
= prep
;
443 prep_ch
.bank
= bus
->params
.next_bank
;
445 if (dpn_prop
->imp_def_interrupts
|| !dpn_prop
->simple_ch_prep_sm
||
446 bus
->params
.s_data_mode
!= SDW_PORT_DATA_MODE_NORMAL
)
450 * Enable interrupt before Port prepare.
451 * For Port de-prepare, it is assumed that port
452 * was prepared earlier
455 ret
= sdw_configure_dpn_intr(s_rt
->slave
, p_rt
->num
, prep
,
456 dpn_prop
->imp_def_interrupts
);
461 /* Inform slave about the impending port prepare */
462 sdw_do_port_prep(s_rt
, prep_ch
, SDW_OPS_PORT_PRE_PREP
);
464 /* Prepare Slave port implementing CP_SM */
465 if (!dpn_prop
->simple_ch_prep_sm
) {
466 addr
= SDW_DPN_PREPARECTRL(p_rt
->num
);
469 ret
= sdw_write(s_rt
->slave
, addr
, p_rt
->ch_mask
);
471 ret
= sdw_write(s_rt
->slave
, addr
, 0x0);
474 dev_err(&s_rt
->slave
->dev
,
475 "Slave prep_ctrl reg write failed\n");
479 /* Wait for completion on port ready */
480 port_ready
= &s_rt
->slave
->port_ready
[prep_ch
.num
];
481 wait_for_completion_timeout(port_ready
,
482 msecs_to_jiffies(dpn_prop
->ch_prep_timeout
));
484 val
= sdw_read(s_rt
->slave
, SDW_DPN_PREPARESTATUS(p_rt
->num
));
485 if ((val
< 0) || (val
& p_rt
->ch_mask
)) {
486 ret
= (val
< 0) ? val
: -ETIMEDOUT
;
487 dev_err(&s_rt
->slave
->dev
,
488 "Chn prep failed for port %d: %d\n", prep_ch
.num
, ret
);
493 /* Inform slaves about ports prepared */
494 sdw_do_port_prep(s_rt
, prep_ch
, SDW_OPS_PORT_POST_PREP
);
496 /* Disable interrupt after Port de-prepare */
498 ret
= sdw_configure_dpn_intr(s_rt
->slave
, p_rt
->num
, prep
,
499 dpn_prop
->imp_def_interrupts
);
504 static int sdw_prep_deprep_master_ports(struct sdw_master_runtime
*m_rt
,
505 struct sdw_port_runtime
*p_rt
,
508 struct sdw_transport_params
*t_params
= &p_rt
->transport_params
;
509 struct sdw_bus
*bus
= m_rt
->bus
;
510 const struct sdw_master_port_ops
*ops
= bus
->port_ops
;
511 struct sdw_prepare_ch prep_ch
;
514 prep_ch
.num
= p_rt
->num
;
515 prep_ch
.ch_mask
= p_rt
->ch_mask
;
516 prep_ch
.prepare
= prep
; /* Prepare/De-prepare */
517 prep_ch
.bank
= bus
->params
.next_bank
;
519 /* Pre-prepare/Pre-deprepare port(s) */
520 if (ops
->dpn_port_prep
) {
521 ret
= ops
->dpn_port_prep(bus
, &prep_ch
);
523 dev_err(bus
->dev
, "Port prepare failed for port:%d\n",
533 * sdw_prep_deprep_ports() - Prepare/De-prepare port(s) for Master(s) and
536 * @m_rt: Master runtime handle
537 * @prep: Prepare or De-prepare
539 static int sdw_prep_deprep_ports(struct sdw_master_runtime
*m_rt
, bool prep
)
541 struct sdw_slave_runtime
*s_rt
;
542 struct sdw_port_runtime
*p_rt
;
545 /* Prepare/De-prepare Slave port(s) */
546 list_for_each_entry(s_rt
, &m_rt
->slave_rt_list
, m_rt_node
) {
547 list_for_each_entry(p_rt
, &s_rt
->port_list
, port_node
) {
548 ret
= sdw_prep_deprep_slave_ports(m_rt
->bus
, s_rt
,
555 /* Prepare/De-prepare Master port(s) */
556 list_for_each_entry(p_rt
, &m_rt
->port_list
, port_node
) {
557 ret
= sdw_prep_deprep_master_ports(m_rt
, p_rt
, prep
);
566 * sdw_notify_config() - Notify bus configuration
568 * @m_rt: Master runtime handle
570 * This function notifies the Master(s) and Slave(s) of the
571 * new bus configuration.
573 static int sdw_notify_config(struct sdw_master_runtime
*m_rt
)
575 struct sdw_slave_runtime
*s_rt
;
576 struct sdw_bus
*bus
= m_rt
->bus
;
577 struct sdw_slave
*slave
;
580 if (bus
->ops
->set_bus_conf
) {
581 ret
= bus
->ops
->set_bus_conf(bus
, &bus
->params
);
586 list_for_each_entry(s_rt
, &m_rt
->slave_rt_list
, m_rt_node
) {
589 if (slave
->ops
->bus_config
) {
590 ret
= slave
->ops
->bus_config(slave
, &bus
->params
);
592 dev_err(bus
->dev
, "Notify Slave: %d failed\n",
603 * sdw_program_params() - Program transport and port parameters for Master(s)
606 * @bus: SDW bus instance
607 * @prepare: true if sdw_program_params() is called by _prepare.
609 static int sdw_program_params(struct sdw_bus
*bus
, bool prepare
)
611 struct sdw_master_runtime
*m_rt
;
614 list_for_each_entry(m_rt
, &bus
->m_rt_list
, bus_node
) {
617 * this loop walks through all master runtimes for a
618 * bus, but the ports can only be configured while
619 * explicitly preparing a stream or handling an
620 * already-prepared stream otherwise.
623 m_rt
->stream
->state
== SDW_STREAM_CONFIGURED
)
626 ret
= sdw_program_port_params(m_rt
);
629 "Program transport params failed: %d\n", ret
);
633 ret
= sdw_notify_config(m_rt
);
636 "Notify bus config failed: %d\n", ret
);
640 /* Enable port(s) on alternate bank for all active streams */
641 if (m_rt
->stream
->state
!= SDW_STREAM_ENABLED
)
644 ret
= sdw_enable_disable_ports(m_rt
, true);
646 dev_err(bus
->dev
, "Enable channel failed: %d\n", ret
);
654 static int sdw_bank_switch(struct sdw_bus
*bus
, int m_rt_count
)
656 int col_index
, row_index
;
658 struct sdw_msg
*wr_msg
;
663 wr_msg
= kzalloc(sizeof(*wr_msg
), GFP_KERNEL
);
667 bus
->defer_msg
.msg
= wr_msg
;
669 wbuf
= kzalloc(sizeof(*wbuf
), GFP_KERNEL
);
675 /* Get row and column index to program register */
676 col_index
= sdw_find_col_index(bus
->params
.col
);
677 row_index
= sdw_find_row_index(bus
->params
.row
);
678 wbuf
[0] = col_index
| (row_index
<< 3);
680 if (bus
->params
.next_bank
)
681 addr
= SDW_SCP_FRAMECTRL_B1
;
683 addr
= SDW_SCP_FRAMECTRL_B0
;
685 sdw_fill_msg(wr_msg
, NULL
, addr
, 1, SDW_BROADCAST_DEV_NUM
,
686 SDW_MSG_FLAG_WRITE
, wbuf
);
687 wr_msg
->ssp_sync
= true;
690 * Set the multi_link flag only when both the hardware supports
691 * and hardware-based sync is required
693 multi_link
= bus
->multi_link
&& (m_rt_count
>= bus
->hw_sync_min_links
);
696 ret
= sdw_transfer_defer(bus
, wr_msg
, &bus
->defer_msg
);
698 ret
= sdw_transfer(bus
, wr_msg
);
701 dev_err(bus
->dev
, "Slave frame_ctrl reg write failed\n");
708 bus
->defer_msg
.msg
= NULL
;
709 bus
->params
.curr_bank
= !bus
->params
.curr_bank
;
710 bus
->params
.next_bank
= !bus
->params
.next_bank
;
719 bus
->defer_msg
.msg
= NULL
;
724 * sdw_ml_sync_bank_switch: Multilink register bank switch
726 * @bus: SDW bus instance
728 * Caller function should free the buffers on error
730 static int sdw_ml_sync_bank_switch(struct sdw_bus
*bus
)
732 unsigned long time_left
;
734 if (!bus
->multi_link
)
737 /* Wait for completion of transfer */
738 time_left
= wait_for_completion_timeout(&bus
->defer_msg
.complete
,
739 bus
->bank_switch_timeout
);
742 dev_err(bus
->dev
, "Controller Timed out on bank switch\n");
746 bus
->params
.curr_bank
= !bus
->params
.curr_bank
;
747 bus
->params
.next_bank
= !bus
->params
.next_bank
;
749 if (bus
->defer_msg
.msg
) {
750 kfree(bus
->defer_msg
.msg
->buf
);
751 kfree(bus
->defer_msg
.msg
);
757 static int do_bank_switch(struct sdw_stream_runtime
*stream
)
759 struct sdw_master_runtime
*m_rt
;
760 const struct sdw_master_ops
*ops
;
762 bool multi_link
= false;
766 m_rt_count
= stream
->m_rt_count
;
768 list_for_each_entry(m_rt
, &stream
->master_list
, stream_node
) {
772 if (bus
->multi_link
&& m_rt_count
>= bus
->hw_sync_min_links
) {
774 mutex_lock(&bus
->msg_lock
);
777 /* Pre-bank switch */
778 if (ops
->pre_bank_switch
) {
779 ret
= ops
->pre_bank_switch(bus
);
782 "Pre bank switch op failed: %d\n", ret
);
788 * Perform Bank switch operation.
789 * For multi link cases, the actual bank switch is
790 * synchronized across all Masters and happens later as a
791 * part of post_bank_switch ops.
793 ret
= sdw_bank_switch(bus
, m_rt_count
);
795 dev_err(bus
->dev
, "Bank switch failed: %d\n", ret
);
801 * For multi link cases, it is expected that the bank switch is
802 * triggered by the post_bank_switch for the first Master in the list
803 * and for the other Masters the post_bank_switch() should return doing
806 list_for_each_entry(m_rt
, &stream
->master_list
, stream_node
) {
810 /* Post-bank switch */
811 if (ops
->post_bank_switch
) {
812 ret
= ops
->post_bank_switch(bus
);
815 "Post bank switch op failed: %d\n",
819 } else if (multi_link
) {
821 "Post bank switch ops not implemented\n");
825 /* Set the bank switch timeout to default, if not set */
826 if (!bus
->bank_switch_timeout
)
827 bus
->bank_switch_timeout
= DEFAULT_BANK_SWITCH_TIMEOUT
;
829 /* Check if bank switch was successful */
830 ret
= sdw_ml_sync_bank_switch(bus
);
833 "multi link bank switch failed: %d\n", ret
);
838 mutex_unlock(&bus
->msg_lock
);
844 list_for_each_entry(m_rt
, &stream
->master_list
, stream_node
) {
846 if (bus
->defer_msg
.msg
) {
847 kfree(bus
->defer_msg
.msg
->buf
);
848 kfree(bus
->defer_msg
.msg
);
855 list_for_each_entry(m_rt
, &stream
->master_list
, stream_node
) {
857 if (mutex_is_locked(&bus
->msg_lock
))
858 mutex_unlock(&bus
->msg_lock
);
866 * sdw_release_stream() - Free the assigned stream runtime
868 * @stream: SoundWire stream runtime
870 * sdw_release_stream should be called only once per stream
872 void sdw_release_stream(struct sdw_stream_runtime
*stream
)
876 EXPORT_SYMBOL(sdw_release_stream
);
879 * sdw_alloc_stream() - Allocate and return stream runtime
881 * @stream_name: SoundWire stream name
883 * Allocates a SoundWire stream runtime instance.
884 * sdw_alloc_stream should be called only once per stream. Typically
885 * invoked from ALSA/ASoC machine/platform driver.
887 struct sdw_stream_runtime
*sdw_alloc_stream(const char *stream_name
)
889 struct sdw_stream_runtime
*stream
;
891 stream
= kzalloc(sizeof(*stream
), GFP_KERNEL
);
895 stream
->name
= stream_name
;
896 INIT_LIST_HEAD(&stream
->master_list
);
897 stream
->state
= SDW_STREAM_ALLOCATED
;
898 stream
->m_rt_count
= 0;
902 EXPORT_SYMBOL(sdw_alloc_stream
);
904 static struct sdw_master_runtime
905 *sdw_find_master_rt(struct sdw_bus
*bus
,
906 struct sdw_stream_runtime
*stream
)
908 struct sdw_master_runtime
*m_rt
;
910 /* Retrieve Bus handle if already available */
911 list_for_each_entry(m_rt
, &stream
->master_list
, stream_node
) {
912 if (m_rt
->bus
== bus
)
920 * sdw_alloc_master_rt() - Allocates and initialize Master runtime handle
922 * @bus: SDW bus instance
923 * @stream_config: Stream configuration
924 * @stream: Stream runtime handle.
926 * This function is to be called with bus_lock held.
928 static struct sdw_master_runtime
929 *sdw_alloc_master_rt(struct sdw_bus
*bus
,
930 struct sdw_stream_config
*stream_config
,
931 struct sdw_stream_runtime
*stream
)
933 struct sdw_master_runtime
*m_rt
;
936 * check if Master is already allocated (as a result of Slave adding
937 * it first), if so skip allocation and go to configure
939 m_rt
= sdw_find_master_rt(bus
, stream
);
943 m_rt
= kzalloc(sizeof(*m_rt
), GFP_KERNEL
);
947 /* Initialization of Master runtime handle */
948 INIT_LIST_HEAD(&m_rt
->port_list
);
949 INIT_LIST_HEAD(&m_rt
->slave_rt_list
);
950 list_add_tail(&m_rt
->stream_node
, &stream
->master_list
);
952 list_add_tail(&m_rt
->bus_node
, &bus
->m_rt_list
);
955 m_rt
->ch_count
= stream_config
->ch_count
;
957 m_rt
->stream
= stream
;
958 m_rt
->direction
= stream_config
->direction
;
964 * sdw_alloc_slave_rt() - Allocate and initialize Slave runtime handle.
966 * @slave: Slave handle
967 * @stream_config: Stream configuration
968 * @stream: Stream runtime handle
970 * This function is to be called with bus_lock held.
972 static struct sdw_slave_runtime
973 *sdw_alloc_slave_rt(struct sdw_slave
*slave
,
974 struct sdw_stream_config
*stream_config
,
975 struct sdw_stream_runtime
*stream
)
977 struct sdw_slave_runtime
*s_rt
;
979 s_rt
= kzalloc(sizeof(*s_rt
), GFP_KERNEL
);
983 INIT_LIST_HEAD(&s_rt
->port_list
);
984 s_rt
->ch_count
= stream_config
->ch_count
;
985 s_rt
->direction
= stream_config
->direction
;
991 static void sdw_master_port_release(struct sdw_bus
*bus
,
992 struct sdw_master_runtime
*m_rt
)
994 struct sdw_port_runtime
*p_rt
, *_p_rt
;
996 list_for_each_entry_safe(p_rt
, _p_rt
, &m_rt
->port_list
, port_node
) {
997 list_del(&p_rt
->port_node
);
1002 static void sdw_slave_port_release(struct sdw_bus
*bus
,
1003 struct sdw_slave
*slave
,
1004 struct sdw_stream_runtime
*stream
)
1006 struct sdw_port_runtime
*p_rt
, *_p_rt
;
1007 struct sdw_master_runtime
*m_rt
;
1008 struct sdw_slave_runtime
*s_rt
;
1010 list_for_each_entry(m_rt
, &stream
->master_list
, stream_node
) {
1011 list_for_each_entry(s_rt
, &m_rt
->slave_rt_list
, m_rt_node
) {
1012 if (s_rt
->slave
!= slave
)
1015 list_for_each_entry_safe(p_rt
, _p_rt
,
1016 &s_rt
->port_list
, port_node
) {
1017 list_del(&p_rt
->port_node
);
1025 * sdw_release_slave_stream() - Free Slave(s) runtime handle
1027 * @slave: Slave handle.
1028 * @stream: Stream runtime handle.
1030 * This function is to be called with bus_lock held.
1032 static void sdw_release_slave_stream(struct sdw_slave
*slave
,
1033 struct sdw_stream_runtime
*stream
)
1035 struct sdw_slave_runtime
*s_rt
, *_s_rt
;
1036 struct sdw_master_runtime
*m_rt
;
1038 list_for_each_entry(m_rt
, &stream
->master_list
, stream_node
) {
1039 /* Retrieve Slave runtime handle */
1040 list_for_each_entry_safe(s_rt
, _s_rt
,
1041 &m_rt
->slave_rt_list
, m_rt_node
) {
1042 if (s_rt
->slave
== slave
) {
1043 list_del(&s_rt
->m_rt_node
);
1052 * sdw_release_master_stream() - Free Master runtime handle
1054 * @m_rt: Master runtime node
1055 * @stream: Stream runtime handle.
1057 * This function is to be called with bus_lock held
1058 * It frees the Master runtime handle and associated Slave(s) runtime
1059 * handle. If this is called first then sdw_release_slave_stream() will have
1060 * no effect as Slave(s) runtime handle would already be freed up.
1062 static void sdw_release_master_stream(struct sdw_master_runtime
*m_rt
,
1063 struct sdw_stream_runtime
*stream
)
1065 struct sdw_slave_runtime
*s_rt
, *_s_rt
;
1067 list_for_each_entry_safe(s_rt
, _s_rt
, &m_rt
->slave_rt_list
, m_rt_node
) {
1068 sdw_slave_port_release(s_rt
->slave
->bus
, s_rt
->slave
, stream
);
1069 sdw_release_slave_stream(s_rt
->slave
, stream
);
1072 list_del(&m_rt
->stream_node
);
1073 list_del(&m_rt
->bus_node
);
1078 * sdw_stream_remove_master() - Remove master from sdw_stream
1080 * @bus: SDW Bus instance
1081 * @stream: SoundWire stream
1083 * This removes and frees port_rt and master_rt from a stream
1085 int sdw_stream_remove_master(struct sdw_bus
*bus
,
1086 struct sdw_stream_runtime
*stream
)
1088 struct sdw_master_runtime
*m_rt
, *_m_rt
;
1090 mutex_lock(&bus
->bus_lock
);
1092 list_for_each_entry_safe(m_rt
, _m_rt
,
1093 &stream
->master_list
, stream_node
) {
1094 if (m_rt
->bus
!= bus
)
1097 sdw_master_port_release(bus
, m_rt
);
1098 sdw_release_master_stream(m_rt
, stream
);
1099 stream
->m_rt_count
--;
1102 if (list_empty(&stream
->master_list
))
1103 stream
->state
= SDW_STREAM_RELEASED
;
1105 mutex_unlock(&bus
->bus_lock
);
1109 EXPORT_SYMBOL(sdw_stream_remove_master
);
1112 * sdw_stream_remove_slave() - Remove slave from sdw_stream
1114 * @slave: SDW Slave instance
1115 * @stream: SoundWire stream
1117 * This removes and frees port_rt and slave_rt from a stream
1119 int sdw_stream_remove_slave(struct sdw_slave
*slave
,
1120 struct sdw_stream_runtime
*stream
)
1122 mutex_lock(&slave
->bus
->bus_lock
);
1124 sdw_slave_port_release(slave
->bus
, slave
, stream
);
1125 sdw_release_slave_stream(slave
, stream
);
1127 mutex_unlock(&slave
->bus
->bus_lock
);
1131 EXPORT_SYMBOL(sdw_stream_remove_slave
);
1134 * sdw_config_stream() - Configure the allocated stream
1137 * @stream: SoundWire stream
1138 * @stream_config: Stream configuration for audio stream
1139 * @is_slave: is API called from Slave or Master
1141 * This function is to be called with bus_lock held.
1143 static int sdw_config_stream(struct device
*dev
,
1144 struct sdw_stream_runtime
*stream
,
1145 struct sdw_stream_config
*stream_config
,
1149 * Update the stream rate, channel and bps based on data
1150 * source. For more than one data source (multilink),
1151 * match the rate, bps, stream type and increment number of channels.
1153 * If rate/bps is zero, it means the values are not set, so skip
1154 * comparison and allow the value to be set and stored in stream
1156 if (stream
->params
.rate
&&
1157 stream
->params
.rate
!= stream_config
->frame_rate
) {
1158 dev_err(dev
, "rate not matching, stream:%s\n", stream
->name
);
1162 if (stream
->params
.bps
&&
1163 stream
->params
.bps
!= stream_config
->bps
) {
1164 dev_err(dev
, "bps not matching, stream:%s\n", stream
->name
);
1168 stream
->type
= stream_config
->type
;
1169 stream
->params
.rate
= stream_config
->frame_rate
;
1170 stream
->params
.bps
= stream_config
->bps
;
1172 /* TODO: Update this check during Device-device support */
1174 stream
->params
.ch_count
+= stream_config
->ch_count
;
1179 static int sdw_is_valid_port_range(struct device
*dev
,
1180 struct sdw_port_runtime
*p_rt
)
1182 if (!SDW_VALID_PORT_RANGE(p_rt
->num
)) {
1184 "SoundWire: Invalid port number :%d\n", p_rt
->num
);
1191 static struct sdw_port_runtime
1192 *sdw_port_alloc(struct device
*dev
,
1193 struct sdw_port_config
*port_config
,
1196 struct sdw_port_runtime
*p_rt
;
1198 p_rt
= kzalloc(sizeof(*p_rt
), GFP_KERNEL
);
1202 p_rt
->ch_mask
= port_config
[port_index
].ch_mask
;
1203 p_rt
->num
= port_config
[port_index
].num
;
1208 static int sdw_master_port_config(struct sdw_bus
*bus
,
1209 struct sdw_master_runtime
*m_rt
,
1210 struct sdw_port_config
*port_config
,
1211 unsigned int num_ports
)
1213 struct sdw_port_runtime
*p_rt
;
1216 /* Iterate for number of ports to perform initialization */
1217 for (i
= 0; i
< num_ports
; i
++) {
1218 p_rt
= sdw_port_alloc(bus
->dev
, port_config
, i
);
1223 * TODO: Check port capabilities for requested
1224 * configuration (audio mode support)
1227 list_add_tail(&p_rt
->port_node
, &m_rt
->port_list
);
1233 static int sdw_slave_port_config(struct sdw_slave
*slave
,
1234 struct sdw_slave_runtime
*s_rt
,
1235 struct sdw_port_config
*port_config
,
1236 unsigned int num_config
)
1238 struct sdw_port_runtime
*p_rt
;
1241 /* Iterate for number of ports to perform initialization */
1242 for (i
= 0; i
< num_config
; i
++) {
1243 p_rt
= sdw_port_alloc(&slave
->dev
, port_config
, i
);
1248 * TODO: Check valid port range as defined by DisCo/
1251 ret
= sdw_is_valid_port_range(&slave
->dev
, p_rt
);
1258 * TODO: Check port capabilities for requested
1259 * configuration (audio mode support)
1262 list_add_tail(&p_rt
->port_node
, &s_rt
->port_list
);
1269 * sdw_stream_add_master() - Allocate and add master runtime to a stream
1271 * @bus: SDW Bus instance
1272 * @stream_config: Stream configuration for audio stream
1273 * @port_config: Port configuration for audio stream
1274 * @num_ports: Number of ports
1275 * @stream: SoundWire stream
1277 int sdw_stream_add_master(struct sdw_bus
*bus
,
1278 struct sdw_stream_config
*stream_config
,
1279 struct sdw_port_config
*port_config
,
1280 unsigned int num_ports
,
1281 struct sdw_stream_runtime
*stream
)
1283 struct sdw_master_runtime
*m_rt
;
1286 mutex_lock(&bus
->bus_lock
);
1289 * For multi link streams, add the second master only if
1290 * the bus supports it.
1291 * Check if bus->multi_link is set
1293 if (!bus
->multi_link
&& stream
->m_rt_count
> 0) {
1295 "Multilink not supported, link %d\n", bus
->link_id
);
1300 m_rt
= sdw_alloc_master_rt(bus
, stream_config
, stream
);
1303 "Master runtime config failed for stream:%s\n",
1309 ret
= sdw_config_stream(bus
->dev
, stream
, stream_config
, false);
1313 ret
= sdw_master_port_config(bus
, m_rt
, port_config
, num_ports
);
1317 stream
->m_rt_count
++;
1322 sdw_release_master_stream(m_rt
, stream
);
1324 mutex_unlock(&bus
->bus_lock
);
1327 EXPORT_SYMBOL(sdw_stream_add_master
);
1330 * sdw_stream_add_slave() - Allocate and add master/slave runtime to a stream
1332 * @slave: SDW Slave instance
1333 * @stream_config: Stream configuration for audio stream
1334 * @stream: SoundWire stream
1335 * @port_config: Port configuration for audio stream
1336 * @num_ports: Number of ports
1338 * It is expected that Slave is added before adding Master
1342 int sdw_stream_add_slave(struct sdw_slave
*slave
,
1343 struct sdw_stream_config
*stream_config
,
1344 struct sdw_port_config
*port_config
,
1345 unsigned int num_ports
,
1346 struct sdw_stream_runtime
*stream
)
1348 struct sdw_slave_runtime
*s_rt
;
1349 struct sdw_master_runtime
*m_rt
;
1352 mutex_lock(&slave
->bus
->bus_lock
);
1355 * If this API is invoked by Slave first then m_rt is not valid.
1356 * So, allocate m_rt and add Slave to it.
1358 m_rt
= sdw_alloc_master_rt(slave
->bus
, stream_config
, stream
);
1360 dev_err(&slave
->dev
,
1361 "alloc master runtime failed for stream:%s\n",
1367 s_rt
= sdw_alloc_slave_rt(slave
, stream_config
, stream
);
1369 dev_err(&slave
->dev
,
1370 "Slave runtime config failed for stream:%s\n",
1376 ret
= sdw_config_stream(&slave
->dev
, stream
, stream_config
, true);
1379 * sdw_release_master_stream will release s_rt in slave_rt_list in
1380 * stream_error case, but s_rt is only added to slave_rt_list
1381 * when sdw_config_stream is successful, so free s_rt explicitly
1382 * when sdw_config_stream is failed.
1388 list_add_tail(&s_rt
->m_rt_node
, &m_rt
->slave_rt_list
);
1390 ret
= sdw_slave_port_config(slave
, s_rt
, port_config
, num_ports
);
1395 * Change stream state to CONFIGURED on first Slave add.
1396 * Bus is not aware of number of Slave(s) in a stream at this
1397 * point so cannot depend on all Slave(s) to be added in order to
1398 * change stream state to CONFIGURED.
1400 stream
->state
= SDW_STREAM_CONFIGURED
;
1405 * we hit error so cleanup the stream, release all Slave(s) and
1408 sdw_release_master_stream(m_rt
, stream
);
1410 mutex_unlock(&slave
->bus
->bus_lock
);
1413 EXPORT_SYMBOL(sdw_stream_add_slave
);
1416 * sdw_get_slave_dpn_prop() - Get Slave port capabilities
1418 * @slave: Slave handle
1419 * @direction: Data direction.
1420 * @port_num: Port number
1422 struct sdw_dpn_prop
*sdw_get_slave_dpn_prop(struct sdw_slave
*slave
,
1423 enum sdw_data_direction direction
,
1424 unsigned int port_num
)
1426 struct sdw_dpn_prop
*dpn_prop
;
1430 if (direction
== SDW_DATA_DIR_TX
) {
1431 num_ports
= hweight32(slave
->prop
.source_ports
);
1432 dpn_prop
= slave
->prop
.src_dpn_prop
;
1434 num_ports
= hweight32(slave
->prop
.sink_ports
);
1435 dpn_prop
= slave
->prop
.sink_dpn_prop
;
1438 for (i
= 0; i
< num_ports
; i
++) {
1439 if (dpn_prop
[i
].num
== port_num
)
1440 return &dpn_prop
[i
];
1447 * sdw_acquire_bus_lock: Acquire bus lock for all Master runtime(s)
1449 * @stream: SoundWire stream
1451 * Acquire bus_lock for each of the master runtime(m_rt) part of this
1452 * stream to reconfigure the bus.
1453 * NOTE: This function is called from SoundWire stream ops and is
1454 * expected that a global lock is held before acquiring bus_lock.
1456 static void sdw_acquire_bus_lock(struct sdw_stream_runtime
*stream
)
1458 struct sdw_master_runtime
*m_rt
;
1459 struct sdw_bus
*bus
= NULL
;
1461 /* Iterate for all Master(s) in Master list */
1462 list_for_each_entry(m_rt
, &stream
->master_list
, stream_node
) {
1465 mutex_lock(&bus
->bus_lock
);
1470 * sdw_release_bus_lock: Release bus lock for all Master runtime(s)
1472 * @stream: SoundWire stream
1474 * Release the previously held bus_lock after reconfiguring the bus.
1475 * NOTE: This function is called from SoundWire stream ops and is
1476 * expected that a global lock is held before releasing bus_lock.
1478 static void sdw_release_bus_lock(struct sdw_stream_runtime
*stream
)
1480 struct sdw_master_runtime
*m_rt
= NULL
;
1481 struct sdw_bus
*bus
= NULL
;
1483 /* Iterate for all Master(s) in Master list */
1484 list_for_each_entry_reverse(m_rt
, &stream
->master_list
, stream_node
) {
1486 mutex_unlock(&bus
->bus_lock
);
1490 static int _sdw_prepare_stream(struct sdw_stream_runtime
*stream
,
1493 struct sdw_master_runtime
*m_rt
;
1494 struct sdw_bus
*bus
= NULL
;
1495 struct sdw_master_prop
*prop
;
1496 struct sdw_bus_params params
;
1499 /* Prepare Master(s) and Slave(s) port(s) associated with stream */
1500 list_for_each_entry(m_rt
, &stream
->master_list
, stream_node
) {
1503 memcpy(¶ms
, &bus
->params
, sizeof(params
));
1505 /* TODO: Support Asynchronous mode */
1506 if ((prop
->max_clk_freq
% stream
->params
.rate
) != 0) {
1507 dev_err(bus
->dev
, "Async mode not supported\n");
1512 goto program_params
;
1514 /* Increment cumulative bus bandwidth */
1515 /* TODO: Update this during Device-Device support */
1516 bus
->params
.bandwidth
+= m_rt
->stream
->params
.rate
*
1517 m_rt
->ch_count
* m_rt
->stream
->params
.bps
;
1519 /* Compute params */
1520 if (bus
->compute_params
) {
1521 ret
= bus
->compute_params(bus
);
1523 dev_err(bus
->dev
, "Compute params failed: %d",
1530 /* Program params */
1531 ret
= sdw_program_params(bus
, true);
1533 dev_err(bus
->dev
, "Program params failed: %d\n", ret
);
1534 goto restore_params
;
1539 pr_err("Configuration error in %s\n", __func__
);
1543 ret
= do_bank_switch(stream
);
1545 dev_err(bus
->dev
, "Bank switch failed: %d\n", ret
);
1546 goto restore_params
;
1549 list_for_each_entry(m_rt
, &stream
->master_list
, stream_node
) {
1552 /* Prepare port(s) on the new clock configuration */
1553 ret
= sdw_prep_deprep_ports(m_rt
, true);
1555 dev_err(bus
->dev
, "Prepare port(s) failed ret = %d\n",
1561 stream
->state
= SDW_STREAM_PREPARED
;
1566 memcpy(&bus
->params
, ¶ms
, sizeof(params
));
1571 * sdw_prepare_stream() - Prepare SoundWire stream
1573 * @stream: Soundwire stream
1575 * Documentation/driver-api/soundwire/stream.rst explains this API in detail
1577 int sdw_prepare_stream(struct sdw_stream_runtime
*stream
)
1579 bool update_params
= true;
1583 pr_err("SoundWire: Handle not found for stream\n");
1587 sdw_acquire_bus_lock(stream
);
1589 if (stream
->state
== SDW_STREAM_PREPARED
) {
1594 if (stream
->state
!= SDW_STREAM_CONFIGURED
&&
1595 stream
->state
!= SDW_STREAM_DEPREPARED
&&
1596 stream
->state
!= SDW_STREAM_DISABLED
) {
1597 pr_err("%s: %s: inconsistent state state %d\n",
1598 __func__
, stream
->name
, stream
->state
);
1604 * when the stream is DISABLED, this means sdw_prepare_stream()
1605 * is called as a result of an underflow or a resume operation.
1606 * In this case, the bus parameters shall not be recomputed, but
1607 * still need to be re-applied
1609 if (stream
->state
== SDW_STREAM_DISABLED
)
1610 update_params
= false;
1612 ret
= _sdw_prepare_stream(stream
, update_params
);
1615 sdw_release_bus_lock(stream
);
1618 EXPORT_SYMBOL(sdw_prepare_stream
);
1620 static int _sdw_enable_stream(struct sdw_stream_runtime
*stream
)
1622 struct sdw_master_runtime
*m_rt
;
1623 struct sdw_bus
*bus
= NULL
;
1626 /* Enable Master(s) and Slave(s) port(s) associated with stream */
1627 list_for_each_entry(m_rt
, &stream
->master_list
, stream_node
) {
1630 /* Program params */
1631 ret
= sdw_program_params(bus
, false);
1633 dev_err(bus
->dev
, "Program params failed: %d\n", ret
);
1637 /* Enable port(s) */
1638 ret
= sdw_enable_disable_ports(m_rt
, true);
1641 "Enable port(s) failed ret: %d\n", ret
);
1647 pr_err("Configuration error in %s\n", __func__
);
1651 ret
= do_bank_switch(stream
);
1653 dev_err(bus
->dev
, "Bank switch failed: %d\n", ret
);
1657 stream
->state
= SDW_STREAM_ENABLED
;
1662 * sdw_enable_stream() - Enable SoundWire stream
1664 * @stream: Soundwire stream
1666 * Documentation/driver-api/soundwire/stream.rst explains this API in detail
1668 int sdw_enable_stream(struct sdw_stream_runtime
*stream
)
1673 pr_err("SoundWire: Handle not found for stream\n");
1677 sdw_acquire_bus_lock(stream
);
1679 if (stream
->state
!= SDW_STREAM_PREPARED
&&
1680 stream
->state
!= SDW_STREAM_DISABLED
) {
1681 pr_err("%s: %s: inconsistent state state %d\n",
1682 __func__
, stream
->name
, stream
->state
);
1687 ret
= _sdw_enable_stream(stream
);
1690 sdw_release_bus_lock(stream
);
1693 EXPORT_SYMBOL(sdw_enable_stream
);
1695 static int _sdw_disable_stream(struct sdw_stream_runtime
*stream
)
1697 struct sdw_master_runtime
*m_rt
;
1700 list_for_each_entry(m_rt
, &stream
->master_list
, stream_node
) {
1701 struct sdw_bus
*bus
= m_rt
->bus
;
1703 /* Disable port(s) */
1704 ret
= sdw_enable_disable_ports(m_rt
, false);
1706 dev_err(bus
->dev
, "Disable port(s) failed: %d\n", ret
);
1710 stream
->state
= SDW_STREAM_DISABLED
;
1712 list_for_each_entry(m_rt
, &stream
->master_list
, stream_node
) {
1713 struct sdw_bus
*bus
= m_rt
->bus
;
1715 /* Program params */
1716 ret
= sdw_program_params(bus
, false);
1718 dev_err(bus
->dev
, "Program params failed: %d\n", ret
);
1723 ret
= do_bank_switch(stream
);
1725 pr_err("Bank switch failed: %d\n", ret
);
1729 /* make sure alternate bank (previous current) is also disabled */
1730 list_for_each_entry(m_rt
, &stream
->master_list
, stream_node
) {
1731 struct sdw_bus
*bus
= m_rt
->bus
;
1733 /* Disable port(s) */
1734 ret
= sdw_enable_disable_ports(m_rt
, false);
1736 dev_err(bus
->dev
, "Disable port(s) failed: %d\n", ret
);
1745 * sdw_disable_stream() - Disable SoundWire stream
1747 * @stream: Soundwire stream
1749 * Documentation/driver-api/soundwire/stream.rst explains this API in detail
1751 int sdw_disable_stream(struct sdw_stream_runtime
*stream
)
1756 pr_err("SoundWire: Handle not found for stream\n");
1760 sdw_acquire_bus_lock(stream
);
1762 if (stream
->state
!= SDW_STREAM_ENABLED
) {
1763 pr_err("%s: %s: inconsistent state state %d\n",
1764 __func__
, stream
->name
, stream
->state
);
1769 ret
= _sdw_disable_stream(stream
);
1772 sdw_release_bus_lock(stream
);
1775 EXPORT_SYMBOL(sdw_disable_stream
);
1777 static int _sdw_deprepare_stream(struct sdw_stream_runtime
*stream
)
1779 struct sdw_master_runtime
*m_rt
;
1780 struct sdw_bus
*bus
;
1783 list_for_each_entry(m_rt
, &stream
->master_list
, stream_node
) {
1785 /* De-prepare port(s) */
1786 ret
= sdw_prep_deprep_ports(m_rt
, false);
1789 "De-prepare port(s) failed: %d\n", ret
);
1793 /* TODO: Update this during Device-Device support */
1794 bus
->params
.bandwidth
-= m_rt
->stream
->params
.rate
*
1795 m_rt
->ch_count
* m_rt
->stream
->params
.bps
;
1797 /* Compute params */
1798 if (bus
->compute_params
) {
1799 ret
= bus
->compute_params(bus
);
1801 dev_err(bus
->dev
, "Compute params failed: %d",
1807 /* Program params */
1808 ret
= sdw_program_params(bus
, false);
1810 dev_err(bus
->dev
, "Program params failed: %d\n", ret
);
1815 stream
->state
= SDW_STREAM_DEPREPARED
;
1816 return do_bank_switch(stream
);
1820 * sdw_deprepare_stream() - Deprepare SoundWire stream
1822 * @stream: Soundwire stream
1824 * Documentation/driver-api/soundwire/stream.rst explains this API in detail
1826 int sdw_deprepare_stream(struct sdw_stream_runtime
*stream
)
1831 pr_err("SoundWire: Handle not found for stream\n");
1835 sdw_acquire_bus_lock(stream
);
1837 if (stream
->state
!= SDW_STREAM_PREPARED
&&
1838 stream
->state
!= SDW_STREAM_DISABLED
) {
1839 pr_err("%s: %s: inconsistent state state %d\n",
1840 __func__
, stream
->name
, stream
->state
);
1845 ret
= _sdw_deprepare_stream(stream
);
1848 sdw_release_bus_lock(stream
);
1851 EXPORT_SYMBOL(sdw_deprepare_stream
);
1853 static int set_stream(struct snd_pcm_substream
*substream
,
1854 struct sdw_stream_runtime
*sdw_stream
)
1856 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
1857 struct snd_soc_dai
*dai
;
1861 /* Set stream pointer on all DAIs */
1862 for_each_rtd_dais(rtd
, i
, dai
) {
1863 ret
= snd_soc_dai_set_sdw_stream(dai
, sdw_stream
, substream
->stream
);
1865 dev_err(rtd
->dev
, "failed to set stream pointer on dai %s", dai
->name
);
1874 * sdw_startup_stream() - Startup SoundWire stream
1876 * @sdw_substream: Soundwire stream
1878 * Documentation/driver-api/soundwire/stream.rst explains this API in detail
1880 int sdw_startup_stream(void *sdw_substream
)
1882 struct snd_pcm_substream
*substream
= sdw_substream
;
1883 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
1884 struct sdw_stream_runtime
*sdw_stream
;
1888 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
1889 name
= kasprintf(GFP_KERNEL
, "%s-Playback", substream
->name
);
1891 name
= kasprintf(GFP_KERNEL
, "%s-Capture", substream
->name
);
1896 sdw_stream
= sdw_alloc_stream(name
);
1898 dev_err(rtd
->dev
, "alloc stream failed for substream DAI %s", substream
->name
);
1903 ret
= set_stream(substream
, sdw_stream
);
1905 goto release_stream
;
1909 sdw_release_stream(sdw_stream
);
1910 set_stream(substream
, NULL
);
1915 EXPORT_SYMBOL(sdw_startup_stream
);
1918 * sdw_shutdown_stream() - Shutdown SoundWire stream
1920 * @sdw_substream: Soundwire stream
1922 * Documentation/driver-api/soundwire/stream.rst explains this API in detail
1924 void sdw_shutdown_stream(void *sdw_substream
)
1926 struct snd_pcm_substream
*substream
= sdw_substream
;
1927 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
1928 struct sdw_stream_runtime
*sdw_stream
;
1929 struct snd_soc_dai
*dai
;
1931 /* Find stream from first CPU DAI */
1932 dai
= asoc_rtd_to_cpu(rtd
, 0);
1934 sdw_stream
= snd_soc_dai_get_sdw_stream(dai
, substream
->stream
);
1936 if (IS_ERR(sdw_stream
)) {
1937 dev_err(rtd
->dev
, "no stream found for DAI %s", dai
->name
);
1941 /* release memory */
1942 kfree(sdw_stream
->name
);
1943 sdw_release_stream(sdw_stream
);
1945 /* clear DAI data */
1946 set_stream(substream
, NULL
);
1948 EXPORT_SYMBOL(sdw_shutdown_stream
);