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833 lines
23 KiB
833 lines
23 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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// Copyright 2017-2021 NXP |
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#include <linux/dma-mapping.h> |
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#include <linux/slab.h> |
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#include <linux/module.h> |
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#include <linux/delay.h> |
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#include <linux/rpmsg.h> |
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#include <sound/core.h> |
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#include <sound/pcm.h> |
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#include <sound/pcm_params.h> |
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#include <sound/dmaengine_pcm.h> |
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#include <sound/soc.h> |
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#include "imx-pcm.h" |
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#include "fsl_rpmsg.h" |
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#include "imx-pcm-rpmsg.h" |
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static struct snd_pcm_hardware imx_rpmsg_pcm_hardware = { |
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.info = SNDRV_PCM_INFO_INTERLEAVED | |
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SNDRV_PCM_INFO_BLOCK_TRANSFER | |
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SNDRV_PCM_INFO_MMAP | |
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SNDRV_PCM_INFO_MMAP_VALID | |
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SNDRV_PCM_INFO_NO_PERIOD_WAKEUP | |
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SNDRV_PCM_INFO_PAUSE | |
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SNDRV_PCM_INFO_RESUME, |
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.buffer_bytes_max = IMX_DEFAULT_DMABUF_SIZE, |
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.period_bytes_min = 512, |
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.period_bytes_max = 65536, |
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.periods_min = 2, |
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.periods_max = 6000, |
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.fifo_size = 0, |
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}; |
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static int imx_rpmsg_pcm_send_message(struct rpmsg_msg *msg, |
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struct rpmsg_info *info) |
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{ |
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struct rpmsg_device *rpdev = info->rpdev; |
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int ret = 0; |
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mutex_lock(&info->msg_lock); |
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if (!rpdev) { |
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dev_err(info->dev, "rpmsg channel not ready\n"); |
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mutex_unlock(&info->msg_lock); |
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return -EINVAL; |
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} |
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dev_dbg(&rpdev->dev, "send cmd %d\n", msg->s_msg.header.cmd); |
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if (!(msg->s_msg.header.type == MSG_TYPE_C)) |
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reinit_completion(&info->cmd_complete); |
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ret = rpmsg_send(rpdev->ept, (void *)&msg->s_msg, |
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sizeof(struct rpmsg_s_msg)); |
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if (ret) { |
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dev_err(&rpdev->dev, "rpmsg_send failed: %d\n", ret); |
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mutex_unlock(&info->msg_lock); |
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return ret; |
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} |
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/* No receive msg for TYPE_C command */ |
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if (msg->s_msg.header.type == MSG_TYPE_C) { |
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mutex_unlock(&info->msg_lock); |
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return 0; |
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} |
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/* wait response from rpmsg */ |
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ret = wait_for_completion_timeout(&info->cmd_complete, |
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msecs_to_jiffies(RPMSG_TIMEOUT)); |
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if (!ret) { |
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dev_err(&rpdev->dev, "rpmsg_send cmd %d timeout!\n", |
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msg->s_msg.header.cmd); |
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mutex_unlock(&info->msg_lock); |
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return -ETIMEDOUT; |
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} |
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memcpy(&msg->r_msg, &info->r_msg, sizeof(struct rpmsg_r_msg)); |
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memcpy(&info->msg[msg->r_msg.header.cmd].r_msg, |
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&msg->r_msg, sizeof(struct rpmsg_r_msg)); |
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/* |
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* Reset the buffer pointer to be zero, actully we have |
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* set the buffer pointer to be zero in imx_rpmsg_terminate_all |
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* But if there is timer task queued in queue, after it is |
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* executed the buffer pointer will be changed, so need to |
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* reset it again with TERMINATE command. |
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*/ |
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switch (msg->s_msg.header.cmd) { |
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case TX_TERMINATE: |
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info->msg[TX_POINTER].r_msg.param.buffer_offset = 0; |
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break; |
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case RX_TERMINATE: |
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info->msg[RX_POINTER].r_msg.param.buffer_offset = 0; |
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break; |
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default: |
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break; |
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} |
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dev_dbg(&rpdev->dev, "cmd:%d, resp %d\n", msg->s_msg.header.cmd, |
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info->r_msg.param.resp); |
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mutex_unlock(&info->msg_lock); |
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return 0; |
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} |
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static int imx_rpmsg_insert_workqueue(struct snd_pcm_substream *substream, |
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struct rpmsg_msg *msg, |
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struct rpmsg_info *info) |
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{ |
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unsigned long flags; |
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int ret = 0; |
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/* |
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* Queue the work to workqueue. |
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* If the queue is full, drop the message. |
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*/ |
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spin_lock_irqsave(&info->wq_lock, flags); |
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if (info->work_write_index != info->work_read_index) { |
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int index = info->work_write_index; |
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memcpy(&info->work_list[index].msg, msg, |
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sizeof(struct rpmsg_s_msg)); |
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queue_work(info->rpmsg_wq, &info->work_list[index].work); |
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info->work_write_index++; |
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info->work_write_index %= WORK_MAX_NUM; |
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} else { |
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info->msg_drop_count[substream->stream]++; |
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ret = -EPIPE; |
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} |
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spin_unlock_irqrestore(&info->wq_lock, flags); |
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return ret; |
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} |
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static int imx_rpmsg_pcm_hw_params(struct snd_soc_component *component, |
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struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params) |
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{ |
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struct rpmsg_info *info = dev_get_drvdata(component->dev); |
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struct rpmsg_msg *msg; |
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int ret = 0; |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
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msg = &info->msg[TX_HW_PARAM]; |
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msg->s_msg.header.cmd = TX_HW_PARAM; |
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} else { |
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msg = &info->msg[RX_HW_PARAM]; |
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msg->s_msg.header.cmd = RX_HW_PARAM; |
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} |
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msg->s_msg.param.rate = params_rate(params); |
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switch (params_format(params)) { |
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case SNDRV_PCM_FORMAT_S16_LE: |
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msg->s_msg.param.format = RPMSG_S16_LE; |
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break; |
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case SNDRV_PCM_FORMAT_S24_LE: |
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msg->s_msg.param.format = RPMSG_S24_LE; |
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break; |
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case SNDRV_PCM_FORMAT_DSD_U16_LE: |
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msg->s_msg.param.format = RPMSG_DSD_U16_LE; |
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break; |
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case SNDRV_PCM_FORMAT_DSD_U32_LE: |
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msg->s_msg.param.format = RPMSG_DSD_U32_LE; |
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break; |
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default: |
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msg->s_msg.param.format = RPMSG_S32_LE; |
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break; |
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} |
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switch (params_channels(params)) { |
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case 1: |
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msg->s_msg.param.channels = RPMSG_CH_LEFT; |
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break; |
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case 2: |
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msg->s_msg.param.channels = RPMSG_CH_STEREO; |
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break; |
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default: |
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ret = -EINVAL; |
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break; |
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} |
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info->send_message(msg, info); |
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return ret; |
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} |
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static snd_pcm_uframes_t imx_rpmsg_pcm_pointer(struct snd_soc_component *component, |
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struct snd_pcm_substream *substream) |
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{ |
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struct rpmsg_info *info = dev_get_drvdata(component->dev); |
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struct rpmsg_msg *msg; |
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unsigned int pos = 0; |
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int buffer_tail = 0; |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
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msg = &info->msg[TX_PERIOD_DONE + MSG_TYPE_A_NUM]; |
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else |
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msg = &info->msg[RX_PERIOD_DONE + MSG_TYPE_A_NUM]; |
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buffer_tail = msg->r_msg.param.buffer_tail; |
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pos = buffer_tail * snd_pcm_lib_period_bytes(substream); |
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return bytes_to_frames(substream->runtime, pos); |
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} |
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static void imx_rpmsg_timer_callback(struct timer_list *t) |
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{ |
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struct stream_timer *stream_timer = |
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from_timer(stream_timer, t, timer); |
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struct snd_pcm_substream *substream = stream_timer->substream; |
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struct rpmsg_info *info = stream_timer->info; |
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struct rpmsg_msg *msg; |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
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msg = &info->msg[TX_PERIOD_DONE + MSG_TYPE_A_NUM]; |
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msg->s_msg.header.cmd = TX_PERIOD_DONE; |
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} else { |
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msg = &info->msg[RX_PERIOD_DONE + MSG_TYPE_A_NUM]; |
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msg->s_msg.header.cmd = RX_PERIOD_DONE; |
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} |
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imx_rpmsg_insert_workqueue(substream, msg, info); |
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} |
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static int imx_rpmsg_pcm_open(struct snd_soc_component *component, |
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struct snd_pcm_substream *substream) |
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{ |
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struct rpmsg_info *info = dev_get_drvdata(component->dev); |
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struct rpmsg_msg *msg; |
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int ret = 0; |
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int cmd; |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
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msg = &info->msg[TX_OPEN]; |
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msg->s_msg.header.cmd = TX_OPEN; |
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/* reinitialize buffer counter*/ |
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cmd = TX_PERIOD_DONE + MSG_TYPE_A_NUM; |
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info->msg[cmd].s_msg.param.buffer_tail = 0; |
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info->msg[cmd].r_msg.param.buffer_tail = 0; |
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info->msg[TX_POINTER].r_msg.param.buffer_offset = 0; |
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} else { |
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msg = &info->msg[RX_OPEN]; |
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msg->s_msg.header.cmd = RX_OPEN; |
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/* reinitialize buffer counter*/ |
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cmd = RX_PERIOD_DONE + MSG_TYPE_A_NUM; |
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info->msg[cmd].s_msg.param.buffer_tail = 0; |
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info->msg[cmd].r_msg.param.buffer_tail = 0; |
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info->msg[RX_POINTER].r_msg.param.buffer_offset = 0; |
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} |
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info->send_message(msg, info); |
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imx_rpmsg_pcm_hardware.period_bytes_max = |
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imx_rpmsg_pcm_hardware.buffer_bytes_max / 2; |
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snd_soc_set_runtime_hwparams(substream, &imx_rpmsg_pcm_hardware); |
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ret = snd_pcm_hw_constraint_integer(substream->runtime, |
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SNDRV_PCM_HW_PARAM_PERIODS); |
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if (ret < 0) |
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return ret; |
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info->msg_drop_count[substream->stream] = 0; |
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/* Create timer*/ |
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info->stream_timer[substream->stream].info = info; |
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info->stream_timer[substream->stream].substream = substream; |
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timer_setup(&info->stream_timer[substream->stream].timer, |
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imx_rpmsg_timer_callback, 0); |
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return ret; |
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} |
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static int imx_rpmsg_pcm_close(struct snd_soc_component *component, |
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struct snd_pcm_substream *substream) |
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{ |
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); |
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struct rpmsg_info *info = dev_get_drvdata(component->dev); |
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struct rpmsg_msg *msg; |
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int ret = 0; |
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/* Flush work in workqueue to make TX_CLOSE is the last message */ |
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flush_workqueue(info->rpmsg_wq); |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
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msg = &info->msg[TX_CLOSE]; |
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msg->s_msg.header.cmd = TX_CLOSE; |
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} else { |
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msg = &info->msg[RX_CLOSE]; |
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msg->s_msg.header.cmd = RX_CLOSE; |
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} |
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info->send_message(msg, info); |
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del_timer(&info->stream_timer[substream->stream].timer); |
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rtd->dai_link->ignore_suspend = 0; |
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if (info->msg_drop_count[substream->stream]) |
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dev_warn(rtd->dev, "Msg is dropped!, number is %d\n", |
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info->msg_drop_count[substream->stream]); |
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return ret; |
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} |
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static int imx_rpmsg_pcm_prepare(struct snd_soc_component *component, |
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struct snd_pcm_substream *substream) |
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{ |
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struct snd_pcm_runtime *runtime = substream->runtime; |
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struct snd_soc_pcm_runtime *rtd = substream->private_data; |
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struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); |
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struct fsl_rpmsg *rpmsg = dev_get_drvdata(cpu_dai->dev); |
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/* |
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* NON-MMAP mode, NONBLOCK, Version 2, enable lpa in dts |
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* four conditions to determine the lpa is enabled. |
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*/ |
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if ((runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || |
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runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) && |
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rpmsg->enable_lpa) { |
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/* |
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* Ignore suspend operation in low power mode |
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* M core will continue playback music on A core suspend. |
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*/ |
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rtd->dai_link->ignore_suspend = 1; |
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rpmsg->force_lpa = 1; |
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} else { |
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rpmsg->force_lpa = 0; |
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} |
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return 0; |
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} |
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static void imx_rpmsg_pcm_dma_complete(void *arg) |
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{ |
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struct snd_pcm_substream *substream = arg; |
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snd_pcm_period_elapsed(substream); |
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} |
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static int imx_rpmsg_prepare_and_submit(struct snd_soc_component *component, |
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struct snd_pcm_substream *substream) |
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{ |
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struct rpmsg_info *info = dev_get_drvdata(component->dev); |
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struct rpmsg_msg *msg; |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
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msg = &info->msg[TX_BUFFER]; |
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msg->s_msg.header.cmd = TX_BUFFER; |
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} else { |
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msg = &info->msg[RX_BUFFER]; |
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msg->s_msg.header.cmd = RX_BUFFER; |
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} |
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/* Send buffer address and buffer size */ |
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msg->s_msg.param.buffer_addr = substream->runtime->dma_addr; |
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msg->s_msg.param.buffer_size = snd_pcm_lib_buffer_bytes(substream); |
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msg->s_msg.param.period_size = snd_pcm_lib_period_bytes(substream); |
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msg->s_msg.param.buffer_tail = 0; |
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info->num_period[substream->stream] = msg->s_msg.param.buffer_size / |
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msg->s_msg.param.period_size; |
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info->callback[substream->stream] = imx_rpmsg_pcm_dma_complete; |
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info->callback_param[substream->stream] = substream; |
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return imx_rpmsg_insert_workqueue(substream, msg, info); |
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} |
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static int imx_rpmsg_async_issue_pending(struct snd_soc_component *component, |
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struct snd_pcm_substream *substream) |
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{ |
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struct rpmsg_info *info = dev_get_drvdata(component->dev); |
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struct rpmsg_msg *msg; |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
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msg = &info->msg[TX_START]; |
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msg->s_msg.header.cmd = TX_START; |
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} else { |
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msg = &info->msg[RX_START]; |
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msg->s_msg.header.cmd = RX_START; |
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} |
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return imx_rpmsg_insert_workqueue(substream, msg, info); |
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} |
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static int imx_rpmsg_restart(struct snd_soc_component *component, |
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struct snd_pcm_substream *substream) |
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{ |
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struct rpmsg_info *info = dev_get_drvdata(component->dev); |
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struct rpmsg_msg *msg; |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
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msg = &info->msg[TX_RESTART]; |
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msg->s_msg.header.cmd = TX_RESTART; |
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} else { |
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msg = &info->msg[RX_RESTART]; |
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msg->s_msg.header.cmd = RX_RESTART; |
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} |
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return imx_rpmsg_insert_workqueue(substream, msg, info); |
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} |
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static int imx_rpmsg_pause(struct snd_soc_component *component, |
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struct snd_pcm_substream *substream) |
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{ |
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struct rpmsg_info *info = dev_get_drvdata(component->dev); |
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struct rpmsg_msg *msg; |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
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msg = &info->msg[TX_PAUSE]; |
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msg->s_msg.header.cmd = TX_PAUSE; |
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} else { |
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msg = &info->msg[RX_PAUSE]; |
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msg->s_msg.header.cmd = RX_PAUSE; |
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} |
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return imx_rpmsg_insert_workqueue(substream, msg, info); |
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} |
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static int imx_rpmsg_terminate_all(struct snd_soc_component *component, |
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struct snd_pcm_substream *substream) |
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{ |
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struct rpmsg_info *info = dev_get_drvdata(component->dev); |
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struct rpmsg_msg *msg; |
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int cmd; |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
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msg = &info->msg[TX_TERMINATE]; |
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msg->s_msg.header.cmd = TX_TERMINATE; |
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/* Clear buffer count*/ |
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cmd = TX_PERIOD_DONE + MSG_TYPE_A_NUM; |
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info->msg[cmd].s_msg.param.buffer_tail = 0; |
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info->msg[cmd].r_msg.param.buffer_tail = 0; |
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info->msg[TX_POINTER].r_msg.param.buffer_offset = 0; |
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} else { |
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msg = &info->msg[RX_TERMINATE]; |
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msg->s_msg.header.cmd = RX_TERMINATE; |
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/* Clear buffer count*/ |
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cmd = RX_PERIOD_DONE + MSG_TYPE_A_NUM; |
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info->msg[cmd].s_msg.param.buffer_tail = 0; |
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info->msg[cmd].r_msg.param.buffer_tail = 0; |
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info->msg[RX_POINTER].r_msg.param.buffer_offset = 0; |
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} |
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del_timer(&info->stream_timer[substream->stream].timer); |
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return imx_rpmsg_insert_workqueue(substream, msg, info); |
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} |
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static int imx_rpmsg_pcm_trigger(struct snd_soc_component *component, |
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struct snd_pcm_substream *substream, int cmd) |
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{ |
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struct snd_pcm_runtime *runtime = substream->runtime; |
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struct snd_soc_pcm_runtime *rtd = substream->private_data; |
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struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); |
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struct fsl_rpmsg *rpmsg = dev_get_drvdata(cpu_dai->dev); |
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int ret = 0; |
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switch (cmd) { |
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case SNDRV_PCM_TRIGGER_START: |
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ret = imx_rpmsg_prepare_and_submit(component, substream); |
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if (ret) |
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return ret; |
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ret = imx_rpmsg_async_issue_pending(component, substream); |
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break; |
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case SNDRV_PCM_TRIGGER_RESUME: |
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if (rpmsg->force_lpa) |
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break; |
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fallthrough; |
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
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ret = imx_rpmsg_restart(component, substream); |
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break; |
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case SNDRV_PCM_TRIGGER_SUSPEND: |
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if (!rpmsg->force_lpa) { |
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if (runtime->info & SNDRV_PCM_INFO_PAUSE) |
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ret = imx_rpmsg_pause(component, substream); |
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else |
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ret = imx_rpmsg_terminate_all(component, substream); |
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} |
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break; |
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
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ret = imx_rpmsg_pause(component, substream); |
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break; |
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case SNDRV_PCM_TRIGGER_STOP: |
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ret = imx_rpmsg_terminate_all(component, substream); |
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break; |
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default: |
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return -EINVAL; |
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} |
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if (ret) |
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return ret; |
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|
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return 0; |
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} |
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|
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/* |
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* imx_rpmsg_pcm_ack |
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* |
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* Send the period index to M core through rpmsg, but not send |
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* all the period index to M core, reduce some unnessesary msg |
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* to reduce the pressure of rpmsg bandwidth. |
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*/ |
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static int imx_rpmsg_pcm_ack(struct snd_soc_component *component, |
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struct snd_pcm_substream *substream) |
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{ |
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struct snd_pcm_runtime *runtime = substream->runtime; |
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struct snd_soc_pcm_runtime *rtd = substream->private_data; |
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struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); |
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struct fsl_rpmsg *rpmsg = dev_get_drvdata(cpu_dai->dev); |
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struct rpmsg_info *info = dev_get_drvdata(component->dev); |
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snd_pcm_uframes_t period_size = runtime->period_size; |
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snd_pcm_sframes_t avail; |
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struct timer_list *timer; |
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struct rpmsg_msg *msg; |
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unsigned long flags; |
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int buffer_tail = 0; |
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int written_num; |
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|
|
if (!rpmsg->force_lpa) |
|
return 0; |
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
|
msg = &info->msg[TX_PERIOD_DONE + MSG_TYPE_A_NUM]; |
|
msg->s_msg.header.cmd = TX_PERIOD_DONE; |
|
} else { |
|
msg = &info->msg[RX_PERIOD_DONE + MSG_TYPE_A_NUM]; |
|
msg->s_msg.header.cmd = RX_PERIOD_DONE; |
|
} |
|
|
|
msg->s_msg.header.type = MSG_TYPE_C; |
|
|
|
buffer_tail = (frames_to_bytes(runtime, runtime->control->appl_ptr) % |
|
snd_pcm_lib_buffer_bytes(substream)); |
|
buffer_tail = buffer_tail / snd_pcm_lib_period_bytes(substream); |
|
|
|
/* There is update for period index */ |
|
if (buffer_tail != msg->s_msg.param.buffer_tail) { |
|
written_num = buffer_tail - msg->s_msg.param.buffer_tail; |
|
if (written_num < 0) |
|
written_num += runtime->periods; |
|
|
|
msg->s_msg.param.buffer_tail = buffer_tail; |
|
|
|
/* The notification message is updated to latest */ |
|
spin_lock_irqsave(&info->lock[substream->stream], flags); |
|
memcpy(&info->notify[substream->stream], msg, |
|
sizeof(struct rpmsg_s_msg)); |
|
info->notify_updated[substream->stream] = true; |
|
spin_unlock_irqrestore(&info->lock[substream->stream], flags); |
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
|
avail = snd_pcm_playback_hw_avail(runtime); |
|
else |
|
avail = snd_pcm_capture_hw_avail(runtime); |
|
|
|
timer = &info->stream_timer[substream->stream].timer; |
|
/* |
|
* If the data in the buffer is less than one period before |
|
* this fill, which means the data may not enough on M |
|
* core side, we need to send message immediately to let |
|
* M core know the pointer is updated. |
|
* if there is more than one period data in the buffer before |
|
* this fill, which means the data is enough on M core side, |
|
* we can delay one period (using timer) to send the message |
|
* for reduce the message number in workqueue, because the |
|
* pointer may be updated by ack function later, we can |
|
* send latest pointer to M core side. |
|
*/ |
|
if ((avail - written_num * period_size) <= period_size) { |
|
imx_rpmsg_insert_workqueue(substream, msg, info); |
|
} else if (rpmsg->force_lpa && !timer_pending(timer)) { |
|
int time_msec; |
|
|
|
time_msec = (int)(runtime->period_size * 1000 / runtime->rate); |
|
mod_timer(timer, jiffies + msecs_to_jiffies(time_msec)); |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int imx_rpmsg_pcm_new(struct snd_soc_component *component, |
|
struct snd_soc_pcm_runtime *rtd) |
|
{ |
|
struct snd_card *card = rtd->card->snd_card; |
|
struct snd_pcm *pcm = rtd->pcm; |
|
struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); |
|
struct fsl_rpmsg *rpmsg = dev_get_drvdata(cpu_dai->dev); |
|
int ret; |
|
|
|
ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); |
|
if (ret) |
|
return ret; |
|
|
|
imx_rpmsg_pcm_hardware.buffer_bytes_max = rpmsg->buffer_size; |
|
return snd_pcm_set_fixed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_WC, |
|
pcm->card->dev, rpmsg->buffer_size); |
|
} |
|
|
|
static const struct snd_soc_component_driver imx_rpmsg_soc_component = { |
|
.name = IMX_PCM_DRV_NAME, |
|
.pcm_construct = imx_rpmsg_pcm_new, |
|
.open = imx_rpmsg_pcm_open, |
|
.close = imx_rpmsg_pcm_close, |
|
.hw_params = imx_rpmsg_pcm_hw_params, |
|
.trigger = imx_rpmsg_pcm_trigger, |
|
.pointer = imx_rpmsg_pcm_pointer, |
|
.ack = imx_rpmsg_pcm_ack, |
|
.prepare = imx_rpmsg_pcm_prepare, |
|
}; |
|
|
|
static void imx_rpmsg_pcm_work(struct work_struct *work) |
|
{ |
|
struct work_of_rpmsg *work_of_rpmsg; |
|
bool is_notification = false; |
|
struct rpmsg_info *info; |
|
struct rpmsg_msg msg; |
|
unsigned long flags; |
|
|
|
work_of_rpmsg = container_of(work, struct work_of_rpmsg, work); |
|
info = work_of_rpmsg->info; |
|
|
|
/* |
|
* Every work in the work queue, first we check if there |
|
* is update for period is filled, because there may be not |
|
* enough data in M core side, need to let M core know |
|
* data is updated immediately. |
|
*/ |
|
spin_lock_irqsave(&info->lock[TX], flags); |
|
if (info->notify_updated[TX]) { |
|
memcpy(&msg, &info->notify[TX], sizeof(struct rpmsg_s_msg)); |
|
info->notify_updated[TX] = false; |
|
spin_unlock_irqrestore(&info->lock[TX], flags); |
|
info->send_message(&msg, info); |
|
} else { |
|
spin_unlock_irqrestore(&info->lock[TX], flags); |
|
} |
|
|
|
spin_lock_irqsave(&info->lock[RX], flags); |
|
if (info->notify_updated[RX]) { |
|
memcpy(&msg, &info->notify[RX], sizeof(struct rpmsg_s_msg)); |
|
info->notify_updated[RX] = false; |
|
spin_unlock_irqrestore(&info->lock[RX], flags); |
|
info->send_message(&msg, info); |
|
} else { |
|
spin_unlock_irqrestore(&info->lock[RX], flags); |
|
} |
|
|
|
/* Skip the notification message for it has been processed above */ |
|
if (work_of_rpmsg->msg.s_msg.header.type == MSG_TYPE_C && |
|
(work_of_rpmsg->msg.s_msg.header.cmd == TX_PERIOD_DONE || |
|
work_of_rpmsg->msg.s_msg.header.cmd == RX_PERIOD_DONE)) |
|
is_notification = true; |
|
|
|
if (!is_notification) |
|
info->send_message(&work_of_rpmsg->msg, info); |
|
|
|
/* update read index */ |
|
spin_lock_irqsave(&info->wq_lock, flags); |
|
info->work_read_index++; |
|
info->work_read_index %= WORK_MAX_NUM; |
|
spin_unlock_irqrestore(&info->wq_lock, flags); |
|
} |
|
|
|
static int imx_rpmsg_pcm_probe(struct platform_device *pdev) |
|
{ |
|
struct snd_soc_component *component; |
|
struct rpmsg_info *info; |
|
int ret, i; |
|
|
|
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); |
|
if (!info) |
|
return -ENOMEM; |
|
|
|
platform_set_drvdata(pdev, info); |
|
|
|
info->rpdev = container_of(pdev->dev.parent, struct rpmsg_device, dev); |
|
info->dev = &pdev->dev; |
|
/* Setup work queue */ |
|
info->rpmsg_wq = alloc_ordered_workqueue("rpmsg_audio", |
|
WQ_HIGHPRI | |
|
WQ_UNBOUND | |
|
WQ_FREEZABLE); |
|
if (!info->rpmsg_wq) { |
|
dev_err(&pdev->dev, "workqueue create failed\n"); |
|
return -ENOMEM; |
|
} |
|
|
|
/* Write index initialize 1, make it differ with the read index */ |
|
info->work_write_index = 1; |
|
info->send_message = imx_rpmsg_pcm_send_message; |
|
|
|
for (i = 0; i < WORK_MAX_NUM; i++) { |
|
INIT_WORK(&info->work_list[i].work, imx_rpmsg_pcm_work); |
|
info->work_list[i].info = info; |
|
} |
|
|
|
/* Initialize msg */ |
|
for (i = 0; i < MSG_MAX_NUM; i++) { |
|
info->msg[i].s_msg.header.cate = IMX_RPMSG_AUDIO; |
|
info->msg[i].s_msg.header.major = IMX_RMPSG_MAJOR; |
|
info->msg[i].s_msg.header.minor = IMX_RMPSG_MINOR; |
|
info->msg[i].s_msg.header.type = MSG_TYPE_A; |
|
info->msg[i].s_msg.param.audioindex = 0; |
|
} |
|
|
|
init_completion(&info->cmd_complete); |
|
mutex_init(&info->msg_lock); |
|
spin_lock_init(&info->lock[TX]); |
|
spin_lock_init(&info->lock[RX]); |
|
spin_lock_init(&info->wq_lock); |
|
|
|
ret = devm_snd_soc_register_component(&pdev->dev, |
|
&imx_rpmsg_soc_component, |
|
NULL, 0); |
|
if (ret) |
|
goto fail; |
|
|
|
component = snd_soc_lookup_component(&pdev->dev, IMX_PCM_DRV_NAME); |
|
if (!component) { |
|
ret = -EINVAL; |
|
goto fail; |
|
} |
|
#ifdef CONFIG_DEBUG_FS |
|
component->debugfs_prefix = "rpmsg"; |
|
#endif |
|
|
|
return 0; |
|
|
|
fail: |
|
if (info->rpmsg_wq) |
|
destroy_workqueue(info->rpmsg_wq); |
|
|
|
return ret; |
|
} |
|
|
|
static int imx_rpmsg_pcm_remove(struct platform_device *pdev) |
|
{ |
|
struct rpmsg_info *info = platform_get_drvdata(pdev); |
|
|
|
if (info->rpmsg_wq) |
|
destroy_workqueue(info->rpmsg_wq); |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_PM |
|
static int imx_rpmsg_pcm_runtime_resume(struct device *dev) |
|
{ |
|
struct rpmsg_info *info = dev_get_drvdata(dev); |
|
|
|
cpu_latency_qos_add_request(&info->pm_qos_req, 0); |
|
|
|
return 0; |
|
} |
|
|
|
static int imx_rpmsg_pcm_runtime_suspend(struct device *dev) |
|
{ |
|
struct rpmsg_info *info = dev_get_drvdata(dev); |
|
|
|
cpu_latency_qos_remove_request(&info->pm_qos_req); |
|
|
|
return 0; |
|
} |
|
#endif |
|
|
|
#ifdef CONFIG_PM_SLEEP |
|
static int imx_rpmsg_pcm_suspend(struct device *dev) |
|
{ |
|
struct rpmsg_info *info = dev_get_drvdata(dev); |
|
struct rpmsg_msg *rpmsg_tx; |
|
struct rpmsg_msg *rpmsg_rx; |
|
|
|
rpmsg_tx = &info->msg[TX_SUSPEND]; |
|
rpmsg_rx = &info->msg[RX_SUSPEND]; |
|
|
|
rpmsg_tx->s_msg.header.cmd = TX_SUSPEND; |
|
info->send_message(rpmsg_tx, info); |
|
|
|
rpmsg_rx->s_msg.header.cmd = RX_SUSPEND; |
|
info->send_message(rpmsg_rx, info); |
|
|
|
return 0; |
|
} |
|
|
|
static int imx_rpmsg_pcm_resume(struct device *dev) |
|
{ |
|
struct rpmsg_info *info = dev_get_drvdata(dev); |
|
struct rpmsg_msg *rpmsg_tx; |
|
struct rpmsg_msg *rpmsg_rx; |
|
|
|
rpmsg_tx = &info->msg[TX_RESUME]; |
|
rpmsg_rx = &info->msg[RX_RESUME]; |
|
|
|
rpmsg_tx->s_msg.header.cmd = TX_RESUME; |
|
info->send_message(rpmsg_tx, info); |
|
|
|
rpmsg_rx->s_msg.header.cmd = RX_RESUME; |
|
info->send_message(rpmsg_rx, info); |
|
|
|
return 0; |
|
} |
|
#endif /* CONFIG_PM_SLEEP */ |
|
|
|
static const struct dev_pm_ops imx_rpmsg_pcm_pm_ops = { |
|
SET_RUNTIME_PM_OPS(imx_rpmsg_pcm_runtime_suspend, |
|
imx_rpmsg_pcm_runtime_resume, |
|
NULL) |
|
SET_SYSTEM_SLEEP_PM_OPS(imx_rpmsg_pcm_suspend, |
|
imx_rpmsg_pcm_resume) |
|
}; |
|
|
|
static struct platform_driver imx_pcm_rpmsg_driver = { |
|
.probe = imx_rpmsg_pcm_probe, |
|
.remove = imx_rpmsg_pcm_remove, |
|
.driver = { |
|
.name = IMX_PCM_DRV_NAME, |
|
.pm = &imx_rpmsg_pcm_pm_ops, |
|
}, |
|
}; |
|
module_platform_driver(imx_pcm_rpmsg_driver); |
|
|
|
MODULE_DESCRIPTION("Freescale SoC Audio RPMSG PCM interface"); |
|
MODULE_AUTHOR("Shengjiu Wang <[email protected]>"); |
|
MODULE_ALIAS("platform:" IMX_PCM_DRV_NAME); |
|
MODULE_LICENSE("GPL v2");
|
|
|