1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2d67c46b9STakashi Sakamoto #ifndef SOUND_FIREWIRE_AMDTP_H_INCLUDED 3d67c46b9STakashi Sakamoto #define SOUND_FIREWIRE_AMDTP_H_INCLUDED 4d67c46b9STakashi Sakamoto 5d67c46b9STakashi Sakamoto #include <linux/err.h> 6d67c46b9STakashi Sakamoto #include <linux/interrupt.h> 7d67c46b9STakashi Sakamoto #include <linux/mutex.h> 85955815eSTakashi Sakamoto #include <linux/sched.h> 9d67c46b9STakashi Sakamoto #include <sound/asound.h> 10d67c46b9STakashi Sakamoto #include "packets-buffer.h" 11d67c46b9STakashi Sakamoto 12d67c46b9STakashi Sakamoto /** 13d67c46b9STakashi Sakamoto * enum cip_flags - describes details of the streaming protocol 14d67c46b9STakashi Sakamoto * @CIP_NONBLOCKING: In non-blocking mode, each packet contains 15d67c46b9STakashi Sakamoto * sample_rate/8000 samples, with rounding up or down to adjust 16d67c46b9STakashi Sakamoto * for clock skew and left-over fractional samples. This should 17d67c46b9STakashi Sakamoto * be used if supported by the device. 18d67c46b9STakashi Sakamoto * @CIP_BLOCKING: In blocking mode, each packet contains either zero or 19d67c46b9STakashi Sakamoto * SYT_INTERVAL samples, with these two types alternating so that 20d67c46b9STakashi Sakamoto * the overall sample rate comes out right. 21d67c46b9STakashi Sakamoto * @CIP_EMPTY_WITH_TAG0: Only for in-stream. Empty in-packets have TAG0. 229dae017bSTakashi Sakamoto * @CIP_DBC_IS_END_EVENT: The value of dbc in an packet corresponds to the end 239dae017bSTakashi Sakamoto * of event in the packet. Out of IEC 61883. 24d67c46b9STakashi Sakamoto * @CIP_WRONG_DBS: Only for in-stream. The value of dbs is wrong in in-packets. 25d67c46b9STakashi Sakamoto * The value of data_block_quadlets is used instead of reported value. 26d67c46b9STakashi Sakamoto * @CIP_SKIP_DBC_ZERO_CHECK: Only for in-stream. Packets with zero in dbc is 27d67c46b9STakashi Sakamoto * skipped for detecting discontinuity. 28d67c46b9STakashi Sakamoto * @CIP_EMPTY_HAS_WRONG_DBC: Only for in-stream. The value of dbc in empty 29d67c46b9STakashi Sakamoto * packet is wrong but the others are correct. 30d67c46b9STakashi Sakamoto * @CIP_JUMBO_PAYLOAD: Only for in-stream. The number of data blocks in an 31d67c46b9STakashi Sakamoto * packet is larger than IEC 61883-6 defines. Current implementation 32d67c46b9STakashi Sakamoto * allows 5 times as large as IEC 61883-6 defines. 332128f78fSTakashi Sakamoto * @CIP_HEADER_WITHOUT_EOH: Only for in-stream. CIP Header doesn't include 342128f78fSTakashi Sakamoto * valid EOH. 353b196c39STakashi Sakamoto * @CIP_NO_HEADERS: a lack of headers in packets 36588f2e2cSTakashi Sakamoto * @CIP_UNALIGHED_DBC: Only for in-stream. The value of dbc is not alighed to 37588f2e2cSTakashi Sakamoto * the value of current SYT_INTERVAL; e.g. initial value is not zero. 388070d265STakashi Sakamoto * @CIP_UNAWARE_SYT: For outgoing packet, the value in SYT field of CIP is 0xffff. 398070d265STakashi Sakamoto * For incoming packet, the value in SYT field of CIP is not handled. 40d67c46b9STakashi Sakamoto */ 41d67c46b9STakashi Sakamoto enum cip_flags { 42d67c46b9STakashi Sakamoto CIP_NONBLOCKING = 0x00, 43d67c46b9STakashi Sakamoto CIP_BLOCKING = 0x01, 44dec63cc8STakashi Sakamoto CIP_EMPTY_WITH_TAG0 = 0x02, 45dec63cc8STakashi Sakamoto CIP_DBC_IS_END_EVENT = 0x04, 46dec63cc8STakashi Sakamoto CIP_WRONG_DBS = 0x08, 47dec63cc8STakashi Sakamoto CIP_SKIP_DBC_ZERO_CHECK = 0x10, 4862f00e40STakashi Sakamoto CIP_EMPTY_HAS_WRONG_DBC = 0x20, 4962f00e40STakashi Sakamoto CIP_JUMBO_PAYLOAD = 0x40, 502128f78fSTakashi Sakamoto CIP_HEADER_WITHOUT_EOH = 0x80, 513b196c39STakashi Sakamoto CIP_NO_HEADER = 0x100, 52588f2e2cSTakashi Sakamoto CIP_UNALIGHED_DBC = 0x200, 538070d265STakashi Sakamoto CIP_UNAWARE_SYT = 0x400, 54d67c46b9STakashi Sakamoto }; 55d67c46b9STakashi Sakamoto 56d67c46b9STakashi Sakamoto /** 57d67c46b9STakashi Sakamoto * enum cip_sfc - supported Sampling Frequency Codes (SFCs) 58d67c46b9STakashi Sakamoto * @CIP_SFC_32000: 32,000 data blocks 59d67c46b9STakashi Sakamoto * @CIP_SFC_44100: 44,100 data blocks 60d67c46b9STakashi Sakamoto * @CIP_SFC_48000: 48,000 data blocks 61d67c46b9STakashi Sakamoto * @CIP_SFC_88200: 88,200 data blocks 62d67c46b9STakashi Sakamoto * @CIP_SFC_96000: 96,000 data blocks 63d67c46b9STakashi Sakamoto * @CIP_SFC_176400: 176,400 data blocks 64d67c46b9STakashi Sakamoto * @CIP_SFC_192000: 192,000 data blocks 65d67c46b9STakashi Sakamoto * @CIP_SFC_COUNT: the number of supported SFCs 66d67c46b9STakashi Sakamoto * 67d67c46b9STakashi Sakamoto * These values are used to show nominal Sampling Frequency Code in 68d67c46b9STakashi Sakamoto * Format Dependent Field (FDF) of AMDTP packet header. In IEC 61883-6:2002, 69d67c46b9STakashi Sakamoto * this code means the number of events per second. Actually the code 70d67c46b9STakashi Sakamoto * represents the number of data blocks transferred per second in an AMDTP 71d67c46b9STakashi Sakamoto * stream. 72d67c46b9STakashi Sakamoto * 73d67c46b9STakashi Sakamoto * In IEC 61883-6:2005, some extensions were added to support more types of 74d67c46b9STakashi Sakamoto * data such as 'One Bit LInear Audio', therefore the meaning of SFC became 75d67c46b9STakashi Sakamoto * different depending on the types. 76d67c46b9STakashi Sakamoto * 77d67c46b9STakashi Sakamoto * Currently our implementation is compatible with IEC 61883-6:2002. 78d67c46b9STakashi Sakamoto */ 79d67c46b9STakashi Sakamoto enum cip_sfc { 80d67c46b9STakashi Sakamoto CIP_SFC_32000 = 0, 81d67c46b9STakashi Sakamoto CIP_SFC_44100 = 1, 82d67c46b9STakashi Sakamoto CIP_SFC_48000 = 2, 83d67c46b9STakashi Sakamoto CIP_SFC_88200 = 3, 84d67c46b9STakashi Sakamoto CIP_SFC_96000 = 4, 85d67c46b9STakashi Sakamoto CIP_SFC_176400 = 5, 86d67c46b9STakashi Sakamoto CIP_SFC_192000 = 6, 87d67c46b9STakashi Sakamoto CIP_SFC_COUNT 88d67c46b9STakashi Sakamoto }; 89d67c46b9STakashi Sakamoto 90d67c46b9STakashi Sakamoto struct fw_unit; 91d67c46b9STakashi Sakamoto struct fw_iso_context; 92d67c46b9STakashi Sakamoto struct snd_pcm_substream; 93d67c46b9STakashi Sakamoto struct snd_pcm_runtime; 94d67c46b9STakashi Sakamoto 95d67c46b9STakashi Sakamoto enum amdtp_stream_direction { 96d67c46b9STakashi Sakamoto AMDTP_OUT_STREAM = 0, 97d67c46b9STakashi Sakamoto AMDTP_IN_STREAM 98d67c46b9STakashi Sakamoto }; 99d67c46b9STakashi Sakamoto 10004130cf8STakashi Sakamoto struct pkt_desc { 10104130cf8STakashi Sakamoto u32 cycle; 10204130cf8STakashi Sakamoto u32 syt; 10304130cf8STakashi Sakamoto unsigned int data_blocks; 10404130cf8STakashi Sakamoto unsigned int data_block_counter; 10504130cf8STakashi Sakamoto __be32 *ctx_payload; 106cec371ffSTakashi Sakamoto struct list_head link; 10704130cf8STakashi Sakamoto }; 10804130cf8STakashi Sakamoto 109df075feeSTakashi Sakamoto struct amdtp_stream; 1109a738ad1STakashi Sakamoto typedef unsigned int (*amdtp_stream_process_ctx_payloads_t)( 111df075feeSTakashi Sakamoto struct amdtp_stream *s, 112d2c104a3STakashi Sakamoto const struct pkt_desc *desc, 1130cac60c7STakashi Sakamoto unsigned int count, 114d2c104a3STakashi Sakamoto struct snd_pcm_substream *pcm); 1152472cfb3STakashi Sakamoto 1162472cfb3STakashi Sakamoto struct amdtp_domain; 117d67c46b9STakashi Sakamoto struct amdtp_stream { 118d67c46b9STakashi Sakamoto struct fw_unit *unit; 119ffe66bbeSTakashi Sakamoto // The combination of cip_flags enumeration-constants. 120ffe66bbeSTakashi Sakamoto unsigned int flags; 121d67c46b9STakashi Sakamoto enum amdtp_stream_direction direction; 122d67c46b9STakashi Sakamoto struct mutex mutex; 123d67c46b9STakashi Sakamoto 124d67c46b9STakashi Sakamoto /* For packet processing. */ 125d67c46b9STakashi Sakamoto struct fw_iso_context *context; 126d67c46b9STakashi Sakamoto struct iso_packets_buffer buffer; 127a0e02331STakashi Sakamoto unsigned int queue_size; 128d67c46b9STakashi Sakamoto int packet_index; 129f0117128STakashi Sakamoto struct pkt_desc *packet_descs; 130cec371ffSTakashi Sakamoto struct list_head packet_descs_list; 131f0117128STakashi Sakamoto struct pkt_desc *packet_descs_cursor; 1323b196c39STakashi Sakamoto int tag; 133d3d10a4aSTakashi Sakamoto union { 134d3d10a4aSTakashi Sakamoto struct { 135d3d10a4aSTakashi Sakamoto unsigned int ctx_header_size; 136d3d10a4aSTakashi Sakamoto 137d3d10a4aSTakashi Sakamoto // limit for payload of iso packet. 138f11453c7STakashi Sakamoto unsigned int max_ctx_payload_length; 139d67c46b9STakashi Sakamoto 140d3d10a4aSTakashi Sakamoto // For quirks of CIP headers. 141d3d10a4aSTakashi Sakamoto // Fixed interval of dbc between previos/current 142d3d10a4aSTakashi Sakamoto // packets. 143d3d10a4aSTakashi Sakamoto unsigned int dbc_interval; 144fb25dcc8STakashi Sakamoto 145fb25dcc8STakashi Sakamoto // The device starts multiplexing events to the packet. 146fb25dcc8STakashi Sakamoto bool event_starts; 147f9e5ecdfSTakashi Sakamoto 148f9e5ecdfSTakashi Sakamoto struct { 149f9e5ecdfSTakashi Sakamoto struct seq_desc *descs; 150f9e5ecdfSTakashi Sakamoto unsigned int size; 151cccddec4STakashi Sakamoto unsigned int pos; 152f9e5ecdfSTakashi Sakamoto } cache; 153d3d10a4aSTakashi Sakamoto } tx; 154d3d10a4aSTakashi Sakamoto struct { 155d3d10a4aSTakashi Sakamoto // To generate CIP header. 156d3d10a4aSTakashi Sakamoto unsigned int fdf; 15760dd4929STakashi Sakamoto 15860dd4929STakashi Sakamoto // To generate constant hardware IRQ. 159e229853dSTakashi Sakamoto unsigned int event_count; 1606f24bb8aSTakashi Sakamoto 16113d11f14STakashi Sakamoto // To calculate CIP data blocks and tstamp. 1626f24bb8aSTakashi Sakamoto struct { 1636f24bb8aSTakashi Sakamoto struct seq_desc *descs; 1646f24bb8aSTakashi Sakamoto unsigned int size; 165119c446aSTakashi Sakamoto unsigned int pos; 1666f24bb8aSTakashi Sakamoto } seq; 1676f24bb8aSTakashi Sakamoto 1686f24bb8aSTakashi Sakamoto unsigned int data_block_state; 1696f24bb8aSTakashi Sakamoto unsigned int syt_offset_state; 1706f24bb8aSTakashi Sakamoto unsigned int last_syt_offset; 17139c2649cSTakashi Sakamoto 17239c2649cSTakashi Sakamoto struct amdtp_stream *replay_target; 173c38d8cffSTakashi Sakamoto unsigned int cache_pos; 17460dd4929STakashi Sakamoto } rx; 17560dd4929STakashi Sakamoto } ctx_data; 176d3d10a4aSTakashi Sakamoto 177d67c46b9STakashi Sakamoto /* For CIP headers. */ 178d67c46b9STakashi Sakamoto unsigned int source_node_id_field; 179d67c46b9STakashi Sakamoto unsigned int data_block_quadlets; 180d67c46b9STakashi Sakamoto unsigned int data_block_counter; 1819863874fSTakashi Sakamoto unsigned int sph; 182d67c46b9STakashi Sakamoto unsigned int fmt; 183d67c46b9STakashi Sakamoto 18413d11f14STakashi Sakamoto // Internal flags. 18513d11f14STakashi Sakamoto unsigned int transfer_delay; 186d67c46b9STakashi Sakamoto enum cip_sfc sfc; 187d67c46b9STakashi Sakamoto unsigned int syt_interval; 188d67c46b9STakashi Sakamoto 189d67c46b9STakashi Sakamoto /* For a PCM substream processing. */ 190d67c46b9STakashi Sakamoto struct snd_pcm_substream *pcm; 1914a9bfafcSTakashi Sakamoto snd_pcm_uframes_t pcm_buffer_pointer; 192d67c46b9STakashi Sakamoto unsigned int pcm_period_pointer; 193*a36183f6STakashi Sakamoto unsigned int pcm_frame_multiplier; 194d67c46b9STakashi Sakamoto 195bdaedca7STakashi Sakamoto // To start processing content of packets at the same cycle in several contexts for 196bdaedca7STakashi Sakamoto // each direction. 197b7c7699bSTakashi Sakamoto bool ready_processing; 198bdaedca7STakashi Sakamoto wait_queue_head_t ready_wait; 199705794c5STakashi Sakamoto unsigned int next_cycle; 200d67c46b9STakashi Sakamoto 201df075feeSTakashi Sakamoto /* For backends to process data blocks. */ 202df075feeSTakashi Sakamoto void *protocol; 2039a738ad1STakashi Sakamoto amdtp_stream_process_ctx_payloads_t process_ctx_payloads; 2046261f90bSTakashi Sakamoto 2056261f90bSTakashi Sakamoto // For domain. 206157a53eeSTakashi Sakamoto int channel; 207157a53eeSTakashi Sakamoto int speed; 2086261f90bSTakashi Sakamoto struct list_head list; 2092472cfb3STakashi Sakamoto struct amdtp_domain *domain; 210d67c46b9STakashi Sakamoto }; 211d67c46b9STakashi Sakamoto 212d67c46b9STakashi Sakamoto int amdtp_stream_init(struct amdtp_stream *s, struct fw_unit *unit, 213ffe66bbeSTakashi Sakamoto enum amdtp_stream_direction dir, unsigned int flags, 214df075feeSTakashi Sakamoto unsigned int fmt, 2159a738ad1STakashi Sakamoto amdtp_stream_process_ctx_payloads_t process_ctx_payloads, 216df075feeSTakashi Sakamoto unsigned int protocol_size); 217d67c46b9STakashi Sakamoto void amdtp_stream_destroy(struct amdtp_stream *s); 218d67c46b9STakashi Sakamoto 219df075feeSTakashi Sakamoto int amdtp_stream_set_parameters(struct amdtp_stream *s, unsigned int rate, 220*a36183f6STakashi Sakamoto unsigned int data_block_quadlets, unsigned int pcm_frame_multiplier); 221d67c46b9STakashi Sakamoto unsigned int amdtp_stream_get_max_payload(struct amdtp_stream *s); 222d67c46b9STakashi Sakamoto 223d67c46b9STakashi Sakamoto void amdtp_stream_update(struct amdtp_stream *s); 224d67c46b9STakashi Sakamoto 225d67c46b9STakashi Sakamoto int amdtp_stream_add_pcm_hw_constraints(struct amdtp_stream *s, 226d67c46b9STakashi Sakamoto struct snd_pcm_runtime *runtime); 227df075feeSTakashi Sakamoto 228d67c46b9STakashi Sakamoto void amdtp_stream_pcm_prepare(struct amdtp_stream *s); 229d67c46b9STakashi Sakamoto void amdtp_stream_pcm_abort(struct amdtp_stream *s); 230d67c46b9STakashi Sakamoto 231d67c46b9STakashi Sakamoto extern const unsigned int amdtp_syt_intervals[CIP_SFC_COUNT]; 232d67c46b9STakashi Sakamoto extern const unsigned int amdtp_rate_table[CIP_SFC_COUNT]; 233d67c46b9STakashi Sakamoto 234d67c46b9STakashi Sakamoto /** 235d67c46b9STakashi Sakamoto * amdtp_stream_running - check stream is running or not 236d67c46b9STakashi Sakamoto * @s: the AMDTP stream 237d67c46b9STakashi Sakamoto * 238d67c46b9STakashi Sakamoto * If this function returns true, the stream is running. 239d67c46b9STakashi Sakamoto */ 240d67c46b9STakashi Sakamoto static inline bool amdtp_stream_running(struct amdtp_stream *s) 241d67c46b9STakashi Sakamoto { 242d67c46b9STakashi Sakamoto return !IS_ERR(s->context); 243d67c46b9STakashi Sakamoto } 244d67c46b9STakashi Sakamoto 245d67c46b9STakashi Sakamoto /** 246d67c46b9STakashi Sakamoto * amdtp_streaming_error - check for streaming error 247d67c46b9STakashi Sakamoto * @s: the AMDTP stream 248d67c46b9STakashi Sakamoto * 249d67c46b9STakashi Sakamoto * If this function returns true, the stream's packet queue has stopped due to 250d67c46b9STakashi Sakamoto * an asynchronous error. 251d67c46b9STakashi Sakamoto */ 252d67c46b9STakashi Sakamoto static inline bool amdtp_streaming_error(struct amdtp_stream *s) 253d67c46b9STakashi Sakamoto { 254d67c46b9STakashi Sakamoto return s->packet_index < 0; 255d67c46b9STakashi Sakamoto } 256d67c46b9STakashi Sakamoto 257d67c46b9STakashi Sakamoto /** 258d67c46b9STakashi Sakamoto * amdtp_stream_pcm_running - check PCM substream is running or not 259d67c46b9STakashi Sakamoto * @s: the AMDTP stream 260d67c46b9STakashi Sakamoto * 261d67c46b9STakashi Sakamoto * If this function returns true, PCM substream in the AMDTP stream is running. 262d67c46b9STakashi Sakamoto */ 263d67c46b9STakashi Sakamoto static inline bool amdtp_stream_pcm_running(struct amdtp_stream *s) 264d67c46b9STakashi Sakamoto { 265d67c46b9STakashi Sakamoto return !!s->pcm; 266d67c46b9STakashi Sakamoto } 267d67c46b9STakashi Sakamoto 268d67c46b9STakashi Sakamoto /** 269d67c46b9STakashi Sakamoto * amdtp_stream_pcm_trigger - start/stop playback from a PCM device 270d67c46b9STakashi Sakamoto * @s: the AMDTP stream 271d67c46b9STakashi Sakamoto * @pcm: the PCM device to be started, or %NULL to stop the current device 272d67c46b9STakashi Sakamoto * 273d67c46b9STakashi Sakamoto * Call this function on a running isochronous stream to enable the actual 274d67c46b9STakashi Sakamoto * transmission of PCM data. This function should be called from the PCM 275d67c46b9STakashi Sakamoto * device's .trigger callback. 276d67c46b9STakashi Sakamoto */ 277d67c46b9STakashi Sakamoto static inline void amdtp_stream_pcm_trigger(struct amdtp_stream *s, 278d67c46b9STakashi Sakamoto struct snd_pcm_substream *pcm) 279d67c46b9STakashi Sakamoto { 2806aa7de05SMark Rutland WRITE_ONCE(s->pcm, pcm); 281d67c46b9STakashi Sakamoto } 282d67c46b9STakashi Sakamoto 283cec371ffSTakashi Sakamoto /** 284cec371ffSTakashi Sakamoto * amdtp_stream_next_packet_desc - retrieve next descriptor for amdtp packet. 285cec371ffSTakashi Sakamoto * @s: the AMDTP stream 286cec371ffSTakashi Sakamoto * @desc: the descriptor of packet 287cec371ffSTakashi Sakamoto * 288cec371ffSTakashi Sakamoto * This macro computes next descriptor so that the list of descriptors behaves circular queue. 289cec371ffSTakashi Sakamoto */ 290cec371ffSTakashi Sakamoto #define amdtp_stream_next_packet_desc(s, desc) \ 291cec371ffSTakashi Sakamoto list_next_entry_circular(desc, &s->packet_descs_list, link) 292cec371ffSTakashi Sakamoto 293d67c46b9STakashi Sakamoto static inline bool cip_sfc_is_base_44100(enum cip_sfc sfc) 294d67c46b9STakashi Sakamoto { 295d67c46b9STakashi Sakamoto return sfc & 1; 296d67c46b9STakashi Sakamoto } 297d67c46b9STakashi Sakamoto 29825babf29STakashi Sakamoto struct seq_desc { 29925babf29STakashi Sakamoto unsigned int syt_offset; 30025babf29STakashi Sakamoto unsigned int data_blocks; 30125babf29STakashi Sakamoto }; 30225babf29STakashi Sakamoto 3033ec3d7a3STakashi Sakamoto struct amdtp_domain { 3043ec3d7a3STakashi Sakamoto struct list_head streams; 305d68c3123STakashi Sakamoto 306d68c3123STakashi Sakamoto unsigned int events_per_period; 307a0e02331STakashi Sakamoto unsigned int events_per_buffer; 30803b4816dSTakashi Sakamoto 30903b4816dSTakashi Sakamoto struct amdtp_stream *irq_target; 31025babf29STakashi Sakamoto 311d32872f3STakashi Sakamoto struct { 31226541cb1STakashi Sakamoto unsigned int tx_init_skip; 313da3623abSTakashi Sakamoto unsigned int tx_start; 3149b1fcd9bSTakashi Sakamoto unsigned int rx_start; 315da3623abSTakashi Sakamoto } processing_cycle; 316f9e5ecdfSTakashi Sakamoto 317f9e5ecdfSTakashi Sakamoto struct { 3182f21a177STakashi Sakamoto bool enable:1; 3192f21a177STakashi Sakamoto bool on_the_fly:1; 320f9e5ecdfSTakashi Sakamoto } replay; 3213ec3d7a3STakashi Sakamoto }; 3223ec3d7a3STakashi Sakamoto 3233ec3d7a3STakashi Sakamoto int amdtp_domain_init(struct amdtp_domain *d); 3243ec3d7a3STakashi Sakamoto void amdtp_domain_destroy(struct amdtp_domain *d); 3253ec3d7a3STakashi Sakamoto 326157a53eeSTakashi Sakamoto int amdtp_domain_add_stream(struct amdtp_domain *d, struct amdtp_stream *s, 327157a53eeSTakashi Sakamoto int channel, int speed); 328157a53eeSTakashi Sakamoto 3292f21a177STakashi Sakamoto int amdtp_domain_start(struct amdtp_domain *d, unsigned int tx_init_skip_cycles, bool replay_seq, 3302f21a177STakashi Sakamoto bool replay_on_the_fly); 3316261f90bSTakashi Sakamoto void amdtp_domain_stop(struct amdtp_domain *d); 3326261f90bSTakashi Sakamoto 333d68c3123STakashi Sakamoto static inline int amdtp_domain_set_events_per_period(struct amdtp_domain *d, 334a0e02331STakashi Sakamoto unsigned int events_per_period, 335a0e02331STakashi Sakamoto unsigned int events_per_buffer) 336d68c3123STakashi Sakamoto { 337d68c3123STakashi Sakamoto d->events_per_period = events_per_period; 338a0e02331STakashi Sakamoto d->events_per_buffer = events_per_buffer; 339d68c3123STakashi Sakamoto 340d68c3123STakashi Sakamoto return 0; 341d68c3123STakashi Sakamoto } 342d68c3123STakashi Sakamoto 343f890f9a0STakashi Sakamoto unsigned long amdtp_domain_stream_pcm_pointer(struct amdtp_domain *d, 344f890f9a0STakashi Sakamoto struct amdtp_stream *s); 345e6dcc92fSTakashi Sakamoto int amdtp_domain_stream_pcm_ack(struct amdtp_domain *d, struct amdtp_stream *s); 346e6dcc92fSTakashi Sakamoto 347bdaedca7STakashi Sakamoto /** 348bdaedca7STakashi Sakamoto * amdtp_domain_wait_ready - sleep till being ready to process packets or timeout 349bdaedca7STakashi Sakamoto * @d: the AMDTP domain 350bdaedca7STakashi Sakamoto * @timeout_ms: msec till timeout 351bdaedca7STakashi Sakamoto * 352bdaedca7STakashi Sakamoto * If this function return false, the AMDTP domain should be stopped. 353bdaedca7STakashi Sakamoto */ 354bdaedca7STakashi Sakamoto static inline bool amdtp_domain_wait_ready(struct amdtp_domain *d, unsigned int timeout_ms) 355bdaedca7STakashi Sakamoto { 356bdaedca7STakashi Sakamoto struct amdtp_stream *s; 357bdaedca7STakashi Sakamoto 358bdaedca7STakashi Sakamoto list_for_each_entry(s, &d->streams, list) { 359bdaedca7STakashi Sakamoto unsigned int j = msecs_to_jiffies(timeout_ms); 360bdaedca7STakashi Sakamoto 361bdaedca7STakashi Sakamoto if (wait_event_interruptible_timeout(s->ready_wait, s->ready_processing, j) <= 0) 362bdaedca7STakashi Sakamoto return false; 363bdaedca7STakashi Sakamoto } 364bdaedca7STakashi Sakamoto 365bdaedca7STakashi Sakamoto return true; 366bdaedca7STakashi Sakamoto } 367bdaedca7STakashi Sakamoto 368d67c46b9STakashi Sakamoto #endif 369