static int msm_dai_q6_hdmi_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct msm_dai_q6_hdmi_dai_data *dai_data = dev_get_drvdata(dai->dev);
#ifdef CONFIG_LGE_COMPRESSED_PATH
struct snd_pcm_runtime *runtime = substream->runtime;
struct msm_audio *prtd = runtime->private_data;
#endif
int rc = 0;
if (!test_bit(STATUS_PORT_STARTED, dai_data->status_mask)) {
#ifdef CONFIG_LGE_COMPRESSED_PATH
pr_debug("msm_dai_q6_hdmi_trigger: compressed_open_flag: %d, samplerate: %d\n", compressed_open_flag, dai_data->rate);
if (compressed_open_flag) {
if (hdmi_msm_audio_get_sample_rate() != dai_data->rate) {
switch (dai_data->rate) {
case 48000:
hdmi_msm_samplingrate_setting(HDMI_SAMPLE_RATE_48KHZ);
break;
case 44100:
hdmi_msm_samplingrate_setting(HDMI_SAMPLE_RATE_44_1KHZ);
break;
case 32000:
hdmi_msm_samplingrate_setting(HDMI_SAMPLE_RATE_32KHZ);
break;
default:
hdmi_msm_samplingrate_setting(HDMI_SAMPLE_RATE_48KHZ);
break;
}
}
//afe_port_start_nowait(dai->id, &dai_data->port_config, dai_data->rate);//afe_open(dai->id, &dai_data->port_config, dai_data->rate);
rc = afe_port_start(dai->id, &dai_data->port_config, dai_data->rate);//afe_open(dai->id, &dai_data->port_config, dai_data->rate);
q6asm_session_cmd_connect_afe_port_nowait(prtd->audio_client);
q6asm_iec_60958_frame_rate_write_nowait(prtd->audio_client, dai_data->rate); //keyman, will be updated
}
else {
hdmi_msm_samplingrate_setting(HDMI_SAMPLE_RATE_48KHZ);
#endif //
rc = afe_port_start(dai->id, &dai_data->port_config,
dai_data->rate);
#ifdef CONFIG_LGE_COMPRESSED_PATH
}
#endif //
if (IS_ERR_VALUE(rc))
dev_err(dai->dev, "fail to open AFE port %x\n",
dai->id);
else
set_bit(STATUS_PORT_STARTED,
dai_data->status_mask);
}
return rc;
}
static ssize_t lpa_if_write(struct file *file, const char __user *buf,
size_t count, loff_t *pos)
{
struct lpa_if *lpa_if = file->private_data;
struct audio_buffer *ab;
const char __user *start = buf;
int xfer, rc;
struct sched_param s = { .sched_priority = 1 };
int old_prio = current->rt_priority;
int old_policy = current->policy;
int cap_nice = cap_raised(current_cap(), CAP_SYS_NICE);
/* just for this write, set us real-time */
if (!task_has_rt_policy(current)) {
struct cred *new = prepare_creds();
cap_raise(new->cap_effective, CAP_SYS_NICE);
commit_creds(new);
if ((sched_setscheduler(current, SCHED_RR, &s)) < 0)
pr_err("sched_setscheduler failed\n");
}
mutex_lock(&lpa_if->lock);
if (dma_buf_index < 2) {
ab = lpa_if->audio_buf + dma_buf_index;
if (copy_from_user(ab->data, buf, count)) {
pr_err("copy from user failed\n");
rc = 0;
goto end;
}
mb();
pr_debug("prefill: count %u audio_buf[%u].size %u\n",
count, dma_buf_index, ab->size);
ab->used = 1;
dma_buf_index++;
rc = count;
goto end;
}
if (lpa_if->config != 1) {
pr_err("AUDIO_START did not happen\n");
rc = 0;
goto end;
}
while (count > 0) {
ab = lpa_if->audio_buf + lpa_if->cpu_buf;
rc = wait_event_timeout(lpa_if->wait, (ab->used == 0), 10 * HZ);
if (!rc) {
pr_err("wait_event_timeout failed\n");
rc = buf - start;
goto end;
}
xfer = count;
if (xfer > lpa_if->dma_period_sz)
xfer = lpa_if->dma_period_sz;
if (copy_from_user(ab->data, buf, xfer)) {
pr_err("copy from user failed\n");
rc = buf - start;
goto end;
}
mb();
buf += xfer;
count -= xfer;
ab->used = 1;
pr_debug("xfer %d, size %d, used %d cpu_buf %d\n",
xfer, ab->size, ab->used, lpa_if->cpu_buf);
lpa_if->cpu_buf++;
lpa_if->cpu_buf = lpa_if->cpu_buf % lpa_if->cfg.buffer_count;
}
rc = buf - start;
end:
mutex_unlock(&lpa_if->lock);
/* restore old scheduling policy */
if (!rt_policy(old_policy)) {
struct sched_param v = { .sched_priority = old_prio };
if ((sched_setscheduler(current, old_policy, &v)) < 0)
pr_err("sched_setscheduler failed\n");
if (likely(!cap_nice)) {
struct cred *new = prepare_creds();
cap_lower(new->cap_effective, CAP_SYS_NICE);
commit_creds(new);
}
}
return rc;
}
static int lpa_if_release(struct inode *inode, struct file *file)
{
struct lpa_if *lpa_if = file->private_data;
hdmi_audio_packet_enable(0);
wait_for_dma_cnt_stop(lpa_if->dma_ch);
hdmi_audio_enable(0, HDMI_AUDIO_FIFO_WATER_MARK);
if (lpa_if->config) {
unregister_dma_irq_handler(lpa_if->dma_ch);
dai_stop_hdmi(lpa_if->dma_ch);
lpa_if->config = 0;
}
core_req_bus_bandwith(AUDIO_IF_BUS_ID, 0, 0);
if (hdmi_msm_audio_get_sample_rate() != HDMI_SAMPLE_RATE_48KHZ)
hdmi_msm_audio_sample_rate_reset(HDMI_SAMPLE_RATE_48KHZ);
return 0;
}
static const struct file_operations lpa_if_fops = {
.owner = THIS_MODULE,
.open = lpa_if_open,
.write = lpa_if_write,
.release = lpa_if_release,
.unlocked_ioctl = lpa_if_ioctl,
};
struct miscdevice lpa_if_misc = {
.minor = MISC_DYNAMIC_MINOR,
.name = "msm_lpa_if_out",
.fops = &lpa_if_fops,
};
static int __init lpa_if_init(void)
{
int rc;
lpa_if_ptr = kzalloc(sizeof(struct lpa_if), GFP_KERNEL);
if (!lpa_if_ptr) {
pr_info("No mem for lpa-if\n");
return -ENOMEM;
}
mutex_init(&lpa_if_ptr->lock);
init_waitqueue_head(&lpa_if_ptr->wait);
lpa_if_ptr->buffer = dma_alloc_coherent(NULL, DMA_ALLOC_BUF_SZ,
&(lpa_if_ptr->buffer_phys), GFP_KERNEL);
if (!lpa_if_ptr->buffer) {
pr_err("dma_alloc_coherent failed\n");
kfree(lpa_if_ptr);
return -ENOMEM;
}
pr_info("lpa_if_ptr 0x%08x buf_vir 0x%08x buf_phy 0x%08x "
" buf_zise %u\n", (u32)lpa_if_ptr,
(u32)(lpa_if_ptr->buffer), lpa_if_ptr->buffer_phys,
DMA_ALLOC_BUF_SZ);
rc = misc_register(&lpa_if_misc);
if (rc < 0) {
pr_err("misc_register failed\n");
dma_free_coherent(NULL, DMA_ALLOC_BUF_SZ, lpa_if_ptr->buffer,
lpa_if_ptr->buffer_phys);
kfree(lpa_if_ptr);
}
return rc;
}
device_initcall(lpa_if_init);
static long lpa_if_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
struct lpa_if *lpa_if = file->private_data;
int rc = 0;
unsigned int i;
pr_debug("cmd %u\n", cmd);
mutex_lock(&lpa_if->lock);
switch (cmd) {
case AUDIO_START:
pr_debug("AUDIO_START\n");
if (dma_buf_index == 2) {
if (!lpa_if->config) {
rc = lpa_if_config(lpa_if);
if (rc)
pr_err("lpa_if_config failed\n");
}
} else {
pr_err("did not receved two buffer for "
"AUDIO_STAR\n");
rc = -EPERM;
}
break;
case AUDIO_STOP:
pr_debug("AUDIO_STOP\n");
break;
case AUDIO_FLUSH:
pr_debug("AUDIO_FLUSH\n");
break;
case AUDIO_GET_CONFIG:
pr_debug("AUDIO_GET_CONFIG\n");
if (copy_to_user((void *)arg, &lpa_if->cfg,
sizeof(struct msm_audio_config))) {
rc = -EFAULT;
}
break;
case AUDIO_SET_CONFIG: {
/* Setting default rate as 48khz */
unsigned int cur_sample_rate =
HDMI_SAMPLE_RATE_48KHZ;
struct msm_audio_config config;
pr_debug("AUDIO_SET_CONFIG\n");
if (copy_from_user(&config, (void *)arg, sizeof(config))) {
rc = -EFAULT;
break;
}
lpa_if->dma_period_sz = config.buffer_size;
if ((lpa_if->dma_period_sz * lpa_if->num_periods) >
DMA_ALLOC_BUF_SZ) {
pr_err("Dma buffer size greater than allocated size\n");
return -EINVAL;
}
pr_debug("Dma_period_sz %d\n", lpa_if->dma_period_sz);
if (lpa_if->dma_period_sz < (2 * SZ_4K))
lpa_if->num_periods = 6;
pr_debug("No. of Periods %d\n", lpa_if->num_periods);
lpa_if->cfg.buffer_count = lpa_if->num_periods;
lpa_if->cfg.buffer_size = lpa_if->dma_period_sz *
lpa_if->num_periods;
for (i = 0; i < lpa_if->cfg.buffer_count; i++) {
lpa_if->audio_buf[i].phys =
lpa_if->buffer_phys + i * lpa_if->dma_period_sz;
lpa_if->audio_buf[i].data =
lpa_if->buffer + i * lpa_if->dma_period_sz;
lpa_if->audio_buf[i].size = lpa_if->dma_period_sz;
lpa_if->audio_buf[i].used = 0;
}
pr_debug("Sample rate %d\n", config.sample_rate);
switch (config.sample_rate) {
case 48000:
cur_sample_rate = HDMI_SAMPLE_RATE_48KHZ;
break;
case 44100:
cur_sample_rate = HDMI_SAMPLE_RATE_44_1KHZ;
break;
case 32000:
cur_sample_rate = HDMI_SAMPLE_RATE_32KHZ;
break;
case 88200:
cur_sample_rate = HDMI_SAMPLE_RATE_88_2KHZ;
break;
case 96000:
cur_sample_rate = HDMI_SAMPLE_RATE_96KHZ;
break;
case 176400:
cur_sample_rate = HDMI_SAMPLE_RATE_176_4KHZ;
break;
case 192000:
cur_sample_rate = HDMI_SAMPLE_RATE_192KHZ;
break;
default:
cur_sample_rate = HDMI_SAMPLE_RATE_48KHZ;
}
if (cur_sample_rate != hdmi_msm_audio_get_sample_rate())
hdmi_msm_audio_sample_rate_reset(cur_sample_rate);
else
pr_debug("Previous sample rate and current"
"sample rate are same\n");
break;
}
default:
pr_err("UnKnown Ioctl\n");
rc = -EINVAL;
}
mutex_unlock(&lpa_if->lock);
return rc;
}
