drivers/staging/intel_sst/intel_sst_stream.c

   1 /*
   2  *  intel_sst_stream.c - Intel SST Driver for audio engine
   3  *
   4  *  Copyright (C) 2008-10 Intel Corp
   5  *  Authors:    Vinod Koul <vinod.koul@intel.com>
   6  *              Harsha Priya <priya.harsha@intel.com>
   7  *              Dharageswari R <dharageswari.r@intel.com>
   8  *              KP Jeeja <jeeja.kp@intel.com>
   9  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; version 2 of the License.
  14  *
  15  *  This program is distributed in the hope that it will be useful, but
  16  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  *  General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License along
  21  *  with this program; if not, write to the Free Software Foundation, Inc.,
  22  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  23  *
  24  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  25  *
  26  *  This file contains the stream operations of SST driver
  27  */
  28
  29 #include <linux/pci.h>
  30 #include <linux/firmware.h>
  31 #include <linux/sched.h>
  32 #include "intel_sst_ioctl.h"
  33 #include "intel_sst.h"
  34 #include "intel_sst_fw_ipc.h"
  35 #include "intel_sst_common.h"
  36
  37 /*
  38  * sst_check_device_type - Check the medfield device type
  39  *
  40  * @device: Device to be checked
  41  * @num_ch: Number of channels queried
  42  * @pcm_slot: slot to be enabled for this device
  43  *
  44  * This checks the deivce against the map and calculates pcm_slot value
  45  */
  46 int sst_check_device_type(u32 device, u32 num_chan, u32 *pcm_slot)
  47 {
  48         if (device > MAX_NUM_STREAMS_MFLD) {
  49                 pr_debug("sst: device type invalid %d\n", device);
  50                 return -EINVAL;
  51         }
  52         if (sst_drv_ctx->streams[device].status == STREAM_UN_INIT) {
  53                 if (device == SND_SST_DEVICE_VIBRA && num_chan == 1)
  54                         *pcm_slot = 0x10;
  55                 else if (device == SND_SST_DEVICE_HAPTIC && num_chan == 1)
  56                         *pcm_slot = 0x20;
  57                 else if (device == SND_SST_DEVICE_IHF && num_chan == 1)
  58                         *pcm_slot = 0x04;
  59                 else if (device == SND_SST_DEVICE_IHF && num_chan == 2)
  60                         *pcm_slot = 0x0C;
  61                 else if (device == SND_SST_DEVICE_HEADSET && num_chan == 1)
  62                         *pcm_slot = 0x01;
  63                 else if (device == SND_SST_DEVICE_HEADSET && num_chan == 2)
  64                         *pcm_slot = 0x03;
  65                 else if (device == SND_SST_DEVICE_CAPTURE && num_chan == 1)
  66                         *pcm_slot = 0x01;
  67                 else if (device == SND_SST_DEVICE_CAPTURE && num_chan == 2)
  68                         *pcm_slot = 0x03;
  69                 else if (device == SND_SST_DEVICE_CAPTURE && num_chan == 3)
  70                         *pcm_slot = 0x07;
  71                 else if (device == SND_SST_DEVICE_CAPTURE && num_chan == 4)
  72                         *pcm_slot = 0x0F;
  73                 else {
  74                         pr_debug("sst: No condition satisfied.. ret err\n");
  75                         return -EINVAL;
  76                 }
  77         } else {
  78                 pr_debug("sst: this stream state is not uni-init, is %d\n",
  79                                 sst_drv_ctx->streams[device].status);
  80                 return -EBADRQC;
  81         }
  82         pr_debug("sst: returning slot %x\n", *pcm_slot);
  83         return 0;
  84 }
  85 /**
  86  * get_mrst_stream_id   -       gets a new stream id for use
  87  *
  88  * This functions searches the current streams and allocated an empty stream
  89  * lock stream_lock required to be held before calling this
  90  */
  91 static unsigned int get_mrst_stream_id(void)
  92 {
  93         int i;
  94
  95         for (i = 1; i <= MAX_NUM_STREAMS_MRST; i++) {
  96                 if (sst_drv_ctx->streams[i].status == STREAM_UN_INIT)
  97                         return i;
  98         }
  99         pr_debug("sst: Didnt find empty stream for mrst\n");
 100         return -EBUSY;
 101 }
 102
 103 /**
 104  * sst_alloc_stream - Send msg for a new stream ID
 105  *
 106  * @params:     stream params
 107  * @stream_ops: operation of stream PB/capture
 108  * @codec:      codec for stream
 109  * @device:     device stream to be allocated for
 110  *
 111  * This function is called by any function which wants to start
 112  * a new stream. This also check if a stream exists which is idle
 113  * it initializes idle stream id to this request
 114  */
 115 int sst_alloc_stream(char *params, unsigned int stream_ops,
 116                u8 codec, unsigned int device)
 117 {
 118         struct ipc_post *msg = NULL;
 119         struct snd_sst_alloc_params alloc_param;
 120         unsigned int pcm_slot = 0, num_ch, str_id;
 121         struct snd_sst_stream_params *sparams;
 122         struct stream_info *str_info;
 123
 124         pr_debug("SST DBG:entering sst_alloc_stream\n");
 125         pr_debug("SST DBG:%d %d %d\n", stream_ops, codec, device);
 126
 127         BUG_ON(!params);
 128         sparams = (struct snd_sst_stream_params *)params;
 129         num_ch = sparams->uc.pcm_params.num_chan;
 130         /*check the device type*/
 131         if (sst_drv_ctx->pci_id == SST_MFLD_PCI_ID) {
 132                 if (sst_check_device_type(device, num_ch, &pcm_slot))
 133                         return -EINVAL;
 134                 mutex_lock(&sst_drv_ctx->stream_lock);
 135                 str_id = device;
 136                 mutex_unlock(&sst_drv_ctx->stream_lock);
 137                 pr_debug("SST_DBG: slot %x\n", pcm_slot);
 138         } else {
 139                 mutex_lock(&sst_drv_ctx->stream_lock);
 140                 str_id = get_mrst_stream_id();
 141                 mutex_unlock(&sst_drv_ctx->stream_lock);
 142                 if (str_id <= 0)
 143                         return -EBUSY;
 144         }
 145         /*allocate device type context*/
 146         sst_init_stream(&sst_drv_ctx->streams[str_id], codec,
 147                         str_id, stream_ops, pcm_slot, device);
 148         /* send msg to FW to allocate a stream */
 149         if (sst_create_large_msg(&msg))
 150                 return -ENOMEM;
 151
 152         sst_fill_header(&msg->header, IPC_IA_ALLOC_STREAM, 1, str_id);
 153         msg->header.part.data = sizeof(alloc_param) + sizeof(u32);
 154         alloc_param.str_type.codec_type = codec;
 155         alloc_param.str_type.str_type = SST_STREAM_TYPE_MUSIC;
 156         alloc_param.str_type.operation = stream_ops;
 157         alloc_param.str_type.protected_str = 0; /* non drm */
 158         alloc_param.str_type.time_slots = pcm_slot;
 159         alloc_param.str_type.result = alloc_param.str_type.reserved = 0;
 160         memcpy(&alloc_param.stream_params, params,
 161                         sizeof(struct snd_sst_stream_params));
 162
 163         memcpy(msg->mailbox_data, &msg->header, sizeof(u32));
 164         memcpy(msg->mailbox_data + sizeof(u32), &alloc_param,
 165                         sizeof(alloc_param));
 166         str_info = &sst_drv_ctx->streams[str_id];
 167         str_info->ctrl_blk.condition = false;
 168         str_info->ctrl_blk.ret_code = 0;
 169         str_info->ctrl_blk.on = true;
 170         spin_lock(&sst_drv_ctx->list_spin_lock);
 171         list_add_tail(&msg->node, &sst_drv_ctx->ipc_dispatch_list);
 172         spin_unlock(&sst_drv_ctx->list_spin_lock);
 173         sst_post_message(&sst_drv_ctx->ipc_post_msg_wq);
 174         pr_debug("SST DBG:alloc stream done\n");
 175         return str_id;
 176 }
 177
 178
 179 /*
 180  * sst_alloc_stream_response - process alloc reply
 181  *
 182  * @str_id:     stream id for which the stream has been allocated
 183  * @resp                the stream response from firware
 184  *
 185  * This function is called by firmware as a response to stream allcoation
 186  * request
 187  */
 188 int sst_alloc_stream_response(unsigned int str_id,
 189                                 struct snd_sst_alloc_response *resp)
 190 {
 191         int retval = 0;
 192         struct stream_info *str_info;
 193         struct snd_sst_lib_download *lib_dnld;
 194
 195         pr_debug("SST DEBUG: stream number given = %d\n", str_id);
 196         str_info = &sst_drv_ctx->streams[str_id];
 197         if (resp->str_type.result == SST_LIB_ERR_LIB_DNLD_REQUIRED) {
 198                 lib_dnld = kzalloc(sizeof(*lib_dnld), GFP_KERNEL);
 199                 memcpy(lib_dnld, &resp->lib_dnld, sizeof(*lib_dnld));
 200         } else
 201                 lib_dnld = NULL;
 202         if (str_info->ctrl_blk.on == true) {
 203                 str_info->ctrl_blk.on = false;
 204                 str_info->ctrl_blk.data = lib_dnld;
 205                 str_info->ctrl_blk.condition = true;
 206                 str_info->ctrl_blk.ret_code = resp->str_type.result;
 207                 pr_debug("SST DEBUG: sst_alloc_stream_response: waking up.\n");
 208                 wake_up(&sst_drv_ctx->wait_queue);
 209         }
 210         return retval;
 211 }
 212
 213
 214 /**
 215 * sst_get_fw_info - Send msg to query for firmware configurations
 216 * @info: out param that holds the firmare configurations
 217 *
 218 * This function is called when the firmware configurations are queiried for
 219 */
 220 int sst_get_fw_info(struct snd_sst_fw_info *info)
 221 {
 222         int retval = 0;
 223         struct ipc_post *msg = NULL;
 224
 225         pr_debug("SST DBG:sst_get_fw_info called\n");
 226
 227         if (sst_create_short_msg(&msg)) {
 228                 pr_err("SST ERR: message creation failed\n");
 229                 return -ENOMEM;
 230         }
 231
 232         sst_fill_header(&msg->header, IPC_IA_GET_FW_INFO, 0, 0);
 233         sst_drv_ctx->fw_info_blk.condition = false;
 234         sst_drv_ctx->fw_info_blk.ret_code = 0;
 235         sst_drv_ctx->fw_info_blk.on = true;
 236         sst_drv_ctx->fw_info_blk.data = info;
 237         spin_lock(&sst_drv_ctx->list_spin_lock);
 238         list_add_tail(&msg->node, &sst_drv_ctx->ipc_dispatch_list);
 239         spin_unlock(&sst_drv_ctx->list_spin_lock);
 240         sst_post_message(&sst_drv_ctx->ipc_post_msg_wq);
 241         retval = sst_wait_interruptible_timeout(sst_drv_ctx,
 242                         &sst_drv_ctx->fw_info_blk, SST_BLOCK_TIMEOUT);
 243         if (retval) {
 244                 pr_err("SST ERR: error in fw_info = %d\n", retval);
 245                 retval = -EIO;
 246         }
 247         return retval;
 248 }
 249
 250
 251 /**
 252 * sst_pause_stream - Send msg for a pausing stream
 253 * @str_id:       stream ID
 254 *
 255 * This function is called by any function which wants to pause
 256 * an already running stream.
 257 */
 258 int sst_start_stream(int str_id)
 259 {
 260         int retval = 0;
 261         struct ipc_post *msg = NULL;
 262         struct stream_info *str_info;
 263
 264         pr_debug("sst_start_stream for %d\n", str_id);
 265         retval = sst_validate_strid(str_id);
 266         if (retval)
 267                 return retval;
 268         str_info = &sst_drv_ctx->streams[str_id];
 269         if (str_info->status != STREAM_INIT)
 270                 return -EBADRQC;
 271         if (sst_create_short_msg(&msg))
 272                 return -ENOMEM;
 273
 274         sst_fill_header(&msg->header, IPC_IA_START_STREAM, 0, str_id);
 275         spin_lock(&sst_drv_ctx->list_spin_lock);
 276         list_add_tail(&msg->node, &sst_drv_ctx->ipc_dispatch_list);
 277         spin_unlock(&sst_drv_ctx->list_spin_lock);
 278         sst_post_message(&sst_drv_ctx->ipc_post_msg_wq);
 279         return retval;
 280 }
 281
 282 /*
 283  * sst_pause_stream - Send msg for a pausing stream
 284  * @str_id:      stream ID
 285  *
 286  * This function is called by any function which wants to pause
 287  * an already running stream.
 288  */
 289 int sst_pause_stream(int str_id)
 290 {
 291         int retval = 0;
 292         struct ipc_post *msg = NULL;
 293         struct stream_info *str_info;
 294
 295         pr_debug("SST DBG:sst_pause_stream for %d\n", str_id);
 296         retval = sst_validate_strid(str_id);
 297         if (retval)
 298                 return retval;
 299         str_info = &sst_drv_ctx->streams[str_id];
 300         if (str_info->status == STREAM_PAUSED)
 301                 return 0;
 302         if (str_info->status == STREAM_RUNNING ||
 303                 str_info->status == STREAM_INIT) {
 304                 if (str_info->prev == STREAM_UN_INIT)
 305                         return -EBADRQC;
 306                 if (str_info->ctrl_blk.on == true) {
 307                         pr_err("SST ERR: control path is in use\n ");
 308                         return -EINVAL;
 309                 }
 310                 if (sst_create_short_msg(&msg))
 311                         return -ENOMEM;
 312
 313                 sst_fill_header(&msg->header, IPC_IA_PAUSE_STREAM, 0, str_id);
 314                 str_info->ctrl_blk.condition = false;
 315                 str_info->ctrl_blk.ret_code = 0;
 316                 str_info->ctrl_blk.on = true;
 317                 spin_lock(&sst_drv_ctx->list_spin_lock);
 318                 list_add_tail(&msg->node,
 319                                 &sst_drv_ctx->ipc_dispatch_list);
 320                 spin_unlock(&sst_drv_ctx->list_spin_lock);
 321                 sst_post_message(&sst_drv_ctx->ipc_post_msg_wq);
 322                 retval = sst_wait_interruptible_timeout(sst_drv_ctx,
 323                                 &str_info->ctrl_blk, SST_BLOCK_TIMEOUT);
 324                 if (retval == 0) {
 325                         str_info->prev = str_info->status;
 326                         str_info->status = STREAM_PAUSED;
 327                 } else if (retval == SST_ERR_INVALID_STREAM_ID) {
 328                         retval = -EINVAL;
 329                         mutex_lock(&sst_drv_ctx->stream_lock);
 330                         sst_clean_stream(str_info);
 331                         mutex_unlock(&sst_drv_ctx->stream_lock);
 332                 }
 333         } else {
 334                 retval = -EBADRQC;
 335                 pr_err("SST ERR:BADQRC for stream\n ");
 336         }
 337
 338         return retval;
 339 }
 340
 341 /**
 342  * sst_resume_stream - Send msg for resuming stream
 343  * @str_id:             stream ID
 344  *
 345  * This function is called by any function which wants to resume
 346  * an already paused stream.
 347  */
 348 int sst_resume_stream(int str_id)
 349 {
 350         int retval = 0;
 351         struct ipc_post *msg = NULL;
 352         struct stream_info *str_info;
 353
 354         pr_debug("SST DBG:sst_resume_stream for %d\n", str_id);
 355         retval = sst_validate_strid(str_id);
 356         if (retval)
 357                 return retval;
 358         str_info = &sst_drv_ctx->streams[str_id];
 359         if (str_info->status == STREAM_RUNNING)
 360                         return 0;
 361         if (str_info->status == STREAM_PAUSED) {
 362                 if (str_info->ctrl_blk.on == true) {
 363                         pr_err("SST ERR: control path in use\n");
 364                         return -EINVAL;
 365                 }
 366                 if (sst_create_short_msg(&msg)) {
 367                         pr_err("SST ERR: mem allocation failed\n");
 368                         return -ENOMEM;
 369                 }
 370                 sst_fill_header(&msg->header, IPC_IA_RESUME_STREAM, 0, str_id);
 371                 str_info->ctrl_blk.condition = false;
 372                 str_info->ctrl_blk.ret_code = 0;
 373                 str_info->ctrl_blk.on = true;
 374                 spin_lock(&sst_drv_ctx->list_spin_lock);
 375                 list_add_tail(&msg->node,
 376                                 &sst_drv_ctx->ipc_dispatch_list);
 377                 spin_unlock(&sst_drv_ctx->list_spin_lock);
 378                 sst_post_message(&sst_drv_ctx->ipc_post_msg_wq);
 379                 retval = sst_wait_interruptible_timeout(sst_drv_ctx,
 380                                 &str_info->ctrl_blk, SST_BLOCK_TIMEOUT);
 381                 if (!retval) {
 382                         if (str_info->prev == STREAM_RUNNING)
 383                                 str_info->status = STREAM_RUNNING;
 384                         else
 385                                 str_info->status = STREAM_INIT;
 386                         str_info->prev = STREAM_PAUSED;
 387                 } else if (retval == -SST_ERR_INVALID_STREAM_ID) {
 388                         retval = -EINVAL;
 389                         mutex_lock(&sst_drv_ctx->stream_lock);
 390                         sst_clean_stream(str_info);
 391                         mutex_unlock(&sst_drv_ctx->stream_lock);
 392                 }
 393         } else {
 394                 retval = -EBADRQC;
 395                 pr_err("SST ERR: BADQRC for stream\n");
 396         }
 397
 398         return retval;
 399 }
 400
 401
 402 /**
 403  * sst_drop_stream - Send msg for stopping stream
 404  * @str_id:             stream ID
 405  *
 406  * This function is called by any function which wants to stop
 407  * a stream.
 408  */
 409 int sst_drop_stream(int str_id)
 410 {
 411         int retval = 0;
 412         struct ipc_post *msg = NULL;
 413         struct sst_stream_bufs *bufs = NULL, *_bufs;
 414         struct stream_info *str_info;
 415
 416         pr_debug("SST DBG:sst_drop_stream for %d\n", str_id);
 417         retval = sst_validate_strid(str_id);
 418         if (retval)
 419                 return retval;
 420         str_info = &sst_drv_ctx->streams[str_id];
 421
 422         if (str_info->status != STREAM_UN_INIT &&
 423                 str_info->status != STREAM_DECODE) {
 424                 if (str_info->ctrl_blk.on == true) {
 425                         pr_err("SST ERR: control path in use\n");
 426                         return -EINVAL;
 427                 }
 428                 if (sst_create_short_msg(&msg)) {
 429                         pr_err("SST ERR: mem allocation failed\n");
 430                         return -ENOMEM;
 431                 }
 432                 sst_fill_header(&msg->header, IPC_IA_DROP_STREAM, 0, str_id);
 433                 str_info->ctrl_blk.condition = false;
 434                 str_info->ctrl_blk.ret_code = 0;
 435                 str_info->ctrl_blk.on = true;
 436                 spin_lock(&sst_drv_ctx->list_spin_lock);
 437                 list_add_tail(&msg->node,
 438                                 &sst_drv_ctx->ipc_dispatch_list);
 439                 spin_unlock(&sst_drv_ctx->list_spin_lock);
 440                 sst_post_message(&sst_drv_ctx->ipc_post_msg_wq);
 441                 retval = sst_wait_interruptible_timeout(sst_drv_ctx,
 442                                 &str_info->ctrl_blk, SST_BLOCK_TIMEOUT);
 443                 if (!retval) {
 444                         pr_debug("SST DBG:drop success\n");
 445                         str_info->prev = STREAM_UN_INIT;
 446                         str_info->status = STREAM_INIT;
 447                         if (str_info->src != MAD_DRV) {
 448                                 mutex_lock(&str_info->lock);
 449                                 list_for_each_entry_safe(bufs, _bufs,
 450                                                         &str_info->bufs, node) {
 451                                         list_del(&bufs->node);
 452                                         kfree(bufs);
 453                                 }
 454                                 mutex_unlock(&str_info->lock);
 455                         }
 456                         str_info->cumm_bytes += str_info->curr_bytes;
 457                 } else if (retval == -SST_ERR_INVALID_STREAM_ID) {
 458                         retval = -EINVAL;
 459                         mutex_lock(&sst_drv_ctx->stream_lock);
 460                         sst_clean_stream(str_info);
 461                         mutex_unlock(&sst_drv_ctx->stream_lock);
 462                 }
 463                 if (str_info->data_blk.on == true) {
 464                         str_info->data_blk.condition = true;
 465                         str_info->data_blk.ret_code = retval;
 466                         wake_up(&sst_drv_ctx->wait_queue);
 467                 }
 468         } else {
 469                 retval = -EBADRQC;
 470                 pr_err("SST ERR:BADQRC for stream\n");
 471         }
 472         return retval;
 473 }
 474
 475 /**
 476 * sst_drain_stream - Send msg for draining stream
 477 * @str_id:              stream ID
 478 *
 479 * This function is called by any function which wants to drain
 480 * a stream.
 481 */
 482 int sst_drain_stream(int str_id)
 483 {
 484         int retval = 0;
 485         struct ipc_post *msg = NULL;
 486         struct stream_info *str_info;
 487
 488         pr_debug("SST DBG:sst_drain_stream for %d\n", str_id);
 489         retval = sst_validate_strid(str_id);
 490         if (retval)
 491                 return retval;
 492         str_info = &sst_drv_ctx->streams[str_id];
 493
 494         if (str_info->status != STREAM_RUNNING &&
 495                 str_info->status != STREAM_INIT &&
 496                 str_info->status != STREAM_PAUSED) {
 497                         pr_err("SST ERR: BADQRC for stream = %d\n",
 498                                        str_info->status);
 499                         return -EBADRQC;
 500         }
 501
 502         if (str_info->status == STREAM_INIT) {
 503                 if (sst_create_short_msg(&msg)) {
 504                         pr_err("SST ERR: mem allocation failed\n");
 505                         return -ENOMEM;
 506                 }
 507                 sst_fill_header(&msg->header, IPC_IA_DRAIN_STREAM, 0, str_id);
 508                 spin_lock(&sst_drv_ctx->list_spin_lock);
 509                 list_add_tail(&msg->node, &sst_drv_ctx->ipc_dispatch_list);
 510                 spin_unlock(&sst_drv_ctx->list_spin_lock);
 511                 sst_post_message(&sst_drv_ctx->ipc_post_msg_wq);
 512         } else
 513                 str_info->need_draining = true;
 514         str_info->data_blk.condition = false;
 515         str_info->data_blk.ret_code = 0;
 516         str_info->data_blk.on = true;
 517         retval = sst_wait_interruptible(sst_drv_ctx, &str_info->data_blk);
 518         str_info->need_draining = false;
 519         if (retval == -SST_ERR_INVALID_STREAM_ID) {
 520                 retval = -EINVAL;
 521                 sst_clean_stream(str_info);
 522         }
 523         return retval;
 524 }
 525
 526 /**
 527  * sst_free_stream - Frees a stream
 528  * @str_id:             stream ID
 529  *
 530  * This function is called by any function which wants to free
 531  * a stream.
 532  */
 533 int sst_free_stream(int str_id)
 534 {
 535         int retval = 0;
 536         struct ipc_post *msg = NULL;
 537         struct stream_info *str_info;
 538
 539         pr_debug("SST DBG:sst_free_stream for %d\n", str_id);
 540
 541         retval = sst_validate_strid(str_id);
 542         if (retval)
 543                 return retval;
 544         str_info = &sst_drv_ctx->streams[str_id];
 545
 546         if (str_info->status != STREAM_UN_INIT) {
 547                 if (sst_create_short_msg(&msg)) {
 548                         pr_err("SST ERR: mem allocation failed\n");
 549                         return -ENOMEM;
 550                 }
 551                 sst_fill_header(&msg->header, IPC_IA_FREE_STREAM, 0, str_id);
 552                 spin_lock(&sst_drv_ctx->list_spin_lock);
 553                 list_add_tail(&msg->node, &sst_drv_ctx->ipc_dispatch_list);
 554                 spin_unlock(&sst_drv_ctx->list_spin_lock);
 555                 sst_post_message(&sst_drv_ctx->ipc_post_msg_wq);
 556                 str_info->prev =  str_info->status;
 557                 str_info->status = STREAM_UN_INIT;
 558                 if (str_info->data_blk.on == true) {
 559                         str_info->data_blk.condition = true;
 560                         str_info->data_blk.ret_code = 0;
 561                         wake_up(&sst_drv_ctx->wait_queue);
 562                 }
 563                 mutex_lock(&sst_drv_ctx->stream_lock);
 564                 sst_clean_stream(str_info);
 565                 mutex_unlock(&sst_drv_ctx->stream_lock);
 566                 pr_debug("SST DBG:Stream freed\n");
 567         } else {
 568                 retval = -EBADRQC;
 569                 pr_debug("SST DBG:BADQRC for stream\n");
 570         }
 571
 572         return retval;
 573 }
 574
 575