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; 10604130cf8STakashi Sakamoto }; 10704130cf8STakashi Sakamoto 108df075feeSTakashi Sakamoto struct amdtp_stream; 1099a738ad1STakashi Sakamoto typedef unsigned int (*amdtp_stream_process_ctx_payloads_t)( 110df075feeSTakashi Sakamoto struct amdtp_stream *s, 111d2c104a3STakashi Sakamoto const struct pkt_desc *desc, 1129a738ad1STakashi Sakamoto unsigned int packets, 113d2c104a3STakashi Sakamoto struct snd_pcm_substream *pcm); 1142472cfb3STakashi Sakamoto 1152472cfb3STakashi Sakamoto struct amdtp_domain; 116d67c46b9STakashi Sakamoto struct amdtp_stream { 117d67c46b9STakashi Sakamoto struct fw_unit *unit; 118ffe66bbeSTakashi Sakamoto // The combination of cip_flags enumeration-constants. 119ffe66bbeSTakashi Sakamoto unsigned int flags; 120d67c46b9STakashi Sakamoto enum amdtp_stream_direction direction; 121d67c46b9STakashi Sakamoto struct mutex mutex; 122d67c46b9STakashi Sakamoto 123d67c46b9STakashi Sakamoto /* For packet processing. */ 124d67c46b9STakashi Sakamoto struct fw_iso_context *context; 125d67c46b9STakashi Sakamoto struct iso_packets_buffer buffer; 126a0e02331STakashi Sakamoto unsigned int queue_size; 127d67c46b9STakashi Sakamoto int packet_index; 12804130cf8STakashi Sakamoto struct pkt_desc *pkt_descs; 1293b196c39STakashi Sakamoto int tag; 130d3d10a4aSTakashi Sakamoto union { 131d3d10a4aSTakashi Sakamoto struct { 132d3d10a4aSTakashi Sakamoto unsigned int ctx_header_size; 133d3d10a4aSTakashi Sakamoto 134d3d10a4aSTakashi Sakamoto // limit for payload of iso packet. 135f11453c7STakashi Sakamoto unsigned int max_ctx_payload_length; 136d67c46b9STakashi Sakamoto 137d3d10a4aSTakashi Sakamoto // For quirks of CIP headers. 138d3d10a4aSTakashi Sakamoto // Fixed interval of dbc between previos/current 139d3d10a4aSTakashi Sakamoto // packets. 140d3d10a4aSTakashi Sakamoto unsigned int dbc_interval; 141fb25dcc8STakashi Sakamoto 142fb25dcc8STakashi Sakamoto // The device starts multiplexing events to the packet. 143fb25dcc8STakashi Sakamoto bool event_starts; 144f9e5ecdfSTakashi Sakamoto 145f9e5ecdfSTakashi Sakamoto struct { 146f9e5ecdfSTakashi Sakamoto struct seq_desc *descs; 147f9e5ecdfSTakashi Sakamoto unsigned int size; 148f9e5ecdfSTakashi Sakamoto unsigned int tail; 149f9e5ecdfSTakashi Sakamoto } cache; 150d3d10a4aSTakashi Sakamoto } tx; 151d3d10a4aSTakashi Sakamoto struct { 152d3d10a4aSTakashi Sakamoto // To generate CIP header. 153d3d10a4aSTakashi Sakamoto unsigned int fdf; 15460dd4929STakashi Sakamoto 15560dd4929STakashi Sakamoto // To generate constant hardware IRQ. 156e229853dSTakashi Sakamoto unsigned int event_count; 1576f24bb8aSTakashi Sakamoto 15813d11f14STakashi Sakamoto // To calculate CIP data blocks and tstamp. 1596f24bb8aSTakashi Sakamoto struct { 1606f24bb8aSTakashi Sakamoto struct seq_desc *descs; 1616f24bb8aSTakashi Sakamoto unsigned int size; 162*119c446aSTakashi Sakamoto unsigned int pos; 1636f24bb8aSTakashi Sakamoto unsigned int head; 1646f24bb8aSTakashi Sakamoto } seq; 1656f24bb8aSTakashi Sakamoto 1666f24bb8aSTakashi Sakamoto unsigned int data_block_state; 1676f24bb8aSTakashi Sakamoto unsigned int syt_offset_state; 1686f24bb8aSTakashi Sakamoto unsigned int last_syt_offset; 16939c2649cSTakashi Sakamoto 17039c2649cSTakashi Sakamoto struct amdtp_stream *replay_target; 17139c2649cSTakashi Sakamoto unsigned int cache_head; 17260dd4929STakashi Sakamoto } rx; 17360dd4929STakashi Sakamoto } ctx_data; 174d3d10a4aSTakashi Sakamoto 175d67c46b9STakashi Sakamoto /* For CIP headers. */ 176d67c46b9STakashi Sakamoto unsigned int source_node_id_field; 177d67c46b9STakashi Sakamoto unsigned int data_block_quadlets; 178d67c46b9STakashi Sakamoto unsigned int data_block_counter; 1799863874fSTakashi Sakamoto unsigned int sph; 180d67c46b9STakashi Sakamoto unsigned int fmt; 181d67c46b9STakashi Sakamoto 18213d11f14STakashi Sakamoto // Internal flags. 18313d11f14STakashi Sakamoto unsigned int transfer_delay; 184d67c46b9STakashi Sakamoto enum cip_sfc sfc; 185d67c46b9STakashi Sakamoto unsigned int syt_interval; 186d67c46b9STakashi Sakamoto 187d67c46b9STakashi Sakamoto /* For a PCM substream processing. */ 188d67c46b9STakashi Sakamoto struct snd_pcm_substream *pcm; 1894a9bfafcSTakashi Sakamoto snd_pcm_uframes_t pcm_buffer_pointer; 190d67c46b9STakashi Sakamoto unsigned int pcm_period_pointer; 191d67c46b9STakashi Sakamoto 192bdaedca7STakashi Sakamoto // To start processing content of packets at the same cycle in several contexts for 193bdaedca7STakashi Sakamoto // each direction. 194b7c7699bSTakashi Sakamoto bool ready_processing; 195bdaedca7STakashi Sakamoto wait_queue_head_t ready_wait; 196705794c5STakashi Sakamoto unsigned int next_cycle; 197d67c46b9STakashi Sakamoto 198df075feeSTakashi Sakamoto /* For backends to process data blocks. */ 199df075feeSTakashi Sakamoto void *protocol; 2009a738ad1STakashi Sakamoto amdtp_stream_process_ctx_payloads_t process_ctx_payloads; 2016261f90bSTakashi Sakamoto 2026261f90bSTakashi Sakamoto // For domain. 203157a53eeSTakashi Sakamoto int channel; 204157a53eeSTakashi Sakamoto int speed; 2056261f90bSTakashi Sakamoto struct list_head list; 2062472cfb3STakashi Sakamoto struct amdtp_domain *domain; 207d67c46b9STakashi Sakamoto }; 208d67c46b9STakashi Sakamoto 209d67c46b9STakashi Sakamoto int amdtp_stream_init(struct amdtp_stream *s, struct fw_unit *unit, 210ffe66bbeSTakashi Sakamoto enum amdtp_stream_direction dir, unsigned int flags, 211df075feeSTakashi Sakamoto unsigned int fmt, 2129a738ad1STakashi Sakamoto amdtp_stream_process_ctx_payloads_t process_ctx_payloads, 213df075feeSTakashi Sakamoto unsigned int protocol_size); 214d67c46b9STakashi Sakamoto void amdtp_stream_destroy(struct amdtp_stream *s); 215d67c46b9STakashi Sakamoto 216df075feeSTakashi Sakamoto int amdtp_stream_set_parameters(struct amdtp_stream *s, unsigned int rate, 217df075feeSTakashi Sakamoto unsigned int data_block_quadlets); 218d67c46b9STakashi Sakamoto unsigned int amdtp_stream_get_max_payload(struct amdtp_stream *s); 219d67c46b9STakashi Sakamoto 220d67c46b9STakashi Sakamoto void amdtp_stream_update(struct amdtp_stream *s); 221d67c46b9STakashi Sakamoto 222d67c46b9STakashi Sakamoto int amdtp_stream_add_pcm_hw_constraints(struct amdtp_stream *s, 223d67c46b9STakashi Sakamoto struct snd_pcm_runtime *runtime); 224df075feeSTakashi Sakamoto 225d67c46b9STakashi Sakamoto void amdtp_stream_pcm_prepare(struct amdtp_stream *s); 226d67c46b9STakashi Sakamoto void amdtp_stream_pcm_abort(struct amdtp_stream *s); 227d67c46b9STakashi Sakamoto 228d67c46b9STakashi Sakamoto extern const unsigned int amdtp_syt_intervals[CIP_SFC_COUNT]; 229d67c46b9STakashi Sakamoto extern const unsigned int amdtp_rate_table[CIP_SFC_COUNT]; 230d67c46b9STakashi Sakamoto 231d67c46b9STakashi Sakamoto /** 232d67c46b9STakashi Sakamoto * amdtp_stream_running - check stream is running or not 233d67c46b9STakashi Sakamoto * @s: the AMDTP stream 234d67c46b9STakashi Sakamoto * 235d67c46b9STakashi Sakamoto * If this function returns true, the stream is running. 236d67c46b9STakashi Sakamoto */ 237d67c46b9STakashi Sakamoto static inline bool amdtp_stream_running(struct amdtp_stream *s) 238d67c46b9STakashi Sakamoto { 239d67c46b9STakashi Sakamoto return !IS_ERR(s->context); 240d67c46b9STakashi Sakamoto } 241d67c46b9STakashi Sakamoto 242d67c46b9STakashi Sakamoto /** 243d67c46b9STakashi Sakamoto * amdtp_streaming_error - check for streaming error 244d67c46b9STakashi Sakamoto * @s: the AMDTP stream 245d67c46b9STakashi Sakamoto * 246d67c46b9STakashi Sakamoto * If this function returns true, the stream's packet queue has stopped due to 247d67c46b9STakashi Sakamoto * an asynchronous error. 248d67c46b9STakashi Sakamoto */ 249d67c46b9STakashi Sakamoto static inline bool amdtp_streaming_error(struct amdtp_stream *s) 250d67c46b9STakashi Sakamoto { 251d67c46b9STakashi Sakamoto return s->packet_index < 0; 252d67c46b9STakashi Sakamoto } 253d67c46b9STakashi Sakamoto 254d67c46b9STakashi Sakamoto /** 255d67c46b9STakashi Sakamoto * amdtp_stream_pcm_running - check PCM substream is running or not 256d67c46b9STakashi Sakamoto * @s: the AMDTP stream 257d67c46b9STakashi Sakamoto * 258d67c46b9STakashi Sakamoto * If this function returns true, PCM substream in the AMDTP stream is running. 259d67c46b9STakashi Sakamoto */ 260d67c46b9STakashi Sakamoto static inline bool amdtp_stream_pcm_running(struct amdtp_stream *s) 261d67c46b9STakashi Sakamoto { 262d67c46b9STakashi Sakamoto return !!s->pcm; 263d67c46b9STakashi Sakamoto } 264d67c46b9STakashi Sakamoto 265d67c46b9STakashi Sakamoto /** 266d67c46b9STakashi Sakamoto * amdtp_stream_pcm_trigger - start/stop playback from a PCM device 267d67c46b9STakashi Sakamoto * @s: the AMDTP stream 268d67c46b9STakashi Sakamoto * @pcm: the PCM device to be started, or %NULL to stop the current device 269d67c46b9STakashi Sakamoto * 270d67c46b9STakashi Sakamoto * Call this function on a running isochronous stream to enable the actual 271d67c46b9STakashi Sakamoto * transmission of PCM data. This function should be called from the PCM 272d67c46b9STakashi Sakamoto * device's .trigger callback. 273d67c46b9STakashi Sakamoto */ 274d67c46b9STakashi Sakamoto static inline void amdtp_stream_pcm_trigger(struct amdtp_stream *s, 275d67c46b9STakashi Sakamoto struct snd_pcm_substream *pcm) 276d67c46b9STakashi Sakamoto { 2776aa7de05SMark Rutland WRITE_ONCE(s->pcm, pcm); 278d67c46b9STakashi Sakamoto } 279d67c46b9STakashi Sakamoto 280d67c46b9STakashi Sakamoto static inline bool cip_sfc_is_base_44100(enum cip_sfc sfc) 281d67c46b9STakashi Sakamoto { 282d67c46b9STakashi Sakamoto return sfc & 1; 283d67c46b9STakashi Sakamoto } 284d67c46b9STakashi Sakamoto 28525babf29STakashi Sakamoto struct seq_desc { 28625babf29STakashi Sakamoto unsigned int syt_offset; 28725babf29STakashi Sakamoto unsigned int data_blocks; 28825babf29STakashi Sakamoto }; 28925babf29STakashi Sakamoto 2903ec3d7a3STakashi Sakamoto struct amdtp_domain { 2913ec3d7a3STakashi Sakamoto struct list_head streams; 292d68c3123STakashi Sakamoto 293d68c3123STakashi Sakamoto unsigned int events_per_period; 294a0e02331STakashi Sakamoto unsigned int events_per_buffer; 29503b4816dSTakashi Sakamoto 29603b4816dSTakashi Sakamoto struct amdtp_stream *irq_target; 29725babf29STakashi Sakamoto 298d32872f3STakashi Sakamoto struct { 29926541cb1STakashi Sakamoto unsigned int tx_init_skip; 300da3623abSTakashi Sakamoto unsigned int tx_start; 3019b1fcd9bSTakashi Sakamoto unsigned int rx_start; 302da3623abSTakashi Sakamoto } processing_cycle; 303f9e5ecdfSTakashi Sakamoto 304f9e5ecdfSTakashi Sakamoto struct { 3052f21a177STakashi Sakamoto bool enable:1; 3062f21a177STakashi Sakamoto bool on_the_fly:1; 307f9e5ecdfSTakashi Sakamoto } replay; 3083ec3d7a3STakashi Sakamoto }; 3093ec3d7a3STakashi Sakamoto 3103ec3d7a3STakashi Sakamoto int amdtp_domain_init(struct amdtp_domain *d); 3113ec3d7a3STakashi Sakamoto void amdtp_domain_destroy(struct amdtp_domain *d); 3123ec3d7a3STakashi Sakamoto 313157a53eeSTakashi Sakamoto int amdtp_domain_add_stream(struct amdtp_domain *d, struct amdtp_stream *s, 314157a53eeSTakashi Sakamoto int channel, int speed); 315157a53eeSTakashi Sakamoto 3162f21a177STakashi Sakamoto int amdtp_domain_start(struct amdtp_domain *d, unsigned int tx_init_skip_cycles, bool replay_seq, 3172f21a177STakashi Sakamoto bool replay_on_the_fly); 3186261f90bSTakashi Sakamoto void amdtp_domain_stop(struct amdtp_domain *d); 3196261f90bSTakashi Sakamoto 320d68c3123STakashi Sakamoto static inline int amdtp_domain_set_events_per_period(struct amdtp_domain *d, 321a0e02331STakashi Sakamoto unsigned int events_per_period, 322a0e02331STakashi Sakamoto unsigned int events_per_buffer) 323d68c3123STakashi Sakamoto { 324d68c3123STakashi Sakamoto d->events_per_period = events_per_period; 325a0e02331STakashi Sakamoto d->events_per_buffer = events_per_buffer; 326d68c3123STakashi Sakamoto 327d68c3123STakashi Sakamoto return 0; 328d68c3123STakashi Sakamoto } 329d68c3123STakashi Sakamoto 330f890f9a0STakashi Sakamoto unsigned long amdtp_domain_stream_pcm_pointer(struct amdtp_domain *d, 331f890f9a0STakashi Sakamoto struct amdtp_stream *s); 332e6dcc92fSTakashi Sakamoto int amdtp_domain_stream_pcm_ack(struct amdtp_domain *d, struct amdtp_stream *s); 333e6dcc92fSTakashi Sakamoto 334bdaedca7STakashi Sakamoto /** 335bdaedca7STakashi Sakamoto * amdtp_domain_wait_ready - sleep till being ready to process packets or timeout 336bdaedca7STakashi Sakamoto * @d: the AMDTP domain 337bdaedca7STakashi Sakamoto * @timeout_ms: msec till timeout 338bdaedca7STakashi Sakamoto * 339bdaedca7STakashi Sakamoto * If this function return false, the AMDTP domain should be stopped. 340bdaedca7STakashi Sakamoto */ 341bdaedca7STakashi Sakamoto static inline bool amdtp_domain_wait_ready(struct amdtp_domain *d, unsigned int timeout_ms) 342bdaedca7STakashi Sakamoto { 343bdaedca7STakashi Sakamoto struct amdtp_stream *s; 344bdaedca7STakashi Sakamoto 345bdaedca7STakashi Sakamoto list_for_each_entry(s, &d->streams, list) { 346bdaedca7STakashi Sakamoto unsigned int j = msecs_to_jiffies(timeout_ms); 347bdaedca7STakashi Sakamoto 348bdaedca7STakashi Sakamoto if (wait_event_interruptible_timeout(s->ready_wait, s->ready_processing, j) <= 0) 349bdaedca7STakashi Sakamoto return false; 350bdaedca7STakashi Sakamoto } 351bdaedca7STakashi Sakamoto 352bdaedca7STakashi Sakamoto return true; 353bdaedca7STakashi Sakamoto } 354bdaedca7STakashi Sakamoto 355d67c46b9STakashi Sakamoto #endif 356