int had_process_hot_unplug(struct snd_intelhad *intelhaddata)
{
int caps, retval = 0;
enum intel_had_aud_buf_type buf_id;
struct had_pvt_data *had_stream;
unsigned long flag_irqs;
pr_debug("Enter:%s", __func__);
had_stream = intelhaddata->private_data;
buf_id = intelhaddata->curr_buf;
spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED) {
pr_debug("Device already disconnected\n");
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
return retval;
} else {
/* Disable Audio */
caps = HDMI_AUDIO_BUFFER_DONE;
retval = had_set_caps(HAD_SET_DISABLE_AUDIO_INT, &caps);
retval = had_set_caps(HAD_SET_DISABLE_AUDIO, NULL);
intelhaddata->ops->enable_audio(intelhaddata->stream_info.had_substream, 0);
}
intelhaddata->drv_status = HAD_DRV_DISCONNECTED;
/* Report to above ALSA layer */
if (intelhaddata->stream_info.had_substream != NULL) {
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
pr_debug("%s: unlock -> sending pcm_stop -> lock\n", __func__);
mutex_lock(&had_mutex);
if (intelhaddata->stream_info.had_substream != NULL)
snd_pcm_stop(intelhaddata->stream_info.had_substream,
SNDRV_PCM_STATE_DISCONNECTED);
mutex_unlock(&had_mutex);
spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
}
had_stream->stream_type = HAD_INIT;
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
kfree(intelhaddata->chmap->chmap);
intelhaddata->chmap->chmap = NULL;
pr_debug("%s: unlocked -> returned\n", __func__);
return retval;
}
/**
* hdmi_audio_suspend - power management suspend function
*
*@haddata: pointer to HAD private data
*@event: pm event for which this method is invoked
*
* This function is called by client driver to suspend the
* hdmi audio.
*/
int hdmi_audio_suspend(void *haddata, hdmi_audio_event_t event)
{
int caps, retval = 0;
struct had_pvt_data *had_stream;
unsigned long flag_irqs;
struct snd_pcm_substream *substream;
struct snd_intelhad *intelhaddata = (struct snd_intelhad *)haddata;
pr_debug("Enter:%s", __func__);
had_stream = intelhaddata->private_data;
substream = intelhaddata->stream_info.had_substream;
if (intelhaddata->dev->power.runtime_status != RPM_SUSPENDED) {
pr_err("audio stream is active\n");
return -EAGAIN;
}
spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED) {
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
pr_debug("had not connected\n");
return retval;
}
if (intelhaddata->drv_status == HAD_DRV_SUSPENDED) {
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
pr_debug("had already suspended\n");
return retval;
}
intelhaddata->drv_status = HAD_DRV_SUSPENDED;
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
/* ToDo: Need to disable UNDERRUN interrupts as well
caps = HDMI_AUDIO_UNDERRUN | HDMI_AUDIO_BUFFER_DONE;
*/
caps = HDMI_AUDIO_BUFFER_DONE;
had_set_caps(HAD_SET_DISABLE_AUDIO_INT, &caps);
had_set_caps(HAD_SET_DISABLE_AUDIO, NULL);
pr_debug("Exit:%s", __func__);
return retval;
}
/**
* hdmi_audio_remove - removes the alsa card
*
*@haddata: pointer to HAD private data
*
* This function is called when the hdmi cable is un-plugged. This function
* free the sound card.
*/
static int __devexit hdmi_audio_remove(struct platform_device *devptr)
{
struct snd_intelhad *intelhaddata = had_data;
int caps;
pr_debug("Enter %s\n", __func__);
if (!intelhaddata)
return 0;
if (intelhaddata->drv_status != HAD_DRV_DISCONNECTED) {
caps = HDMI_AUDIO_UNDERRUN | HDMI_AUDIO_BUFFER_DONE;
had_set_caps(HAD_SET_DISABLE_AUDIO_INT, &caps);
had_set_caps(HAD_SET_DISABLE_AUDIO, NULL);
}
kfree(intelhaddata->flat_data);
snd_card_free(intelhaddata->card);
kfree(intelhaddata->private_data);
kfree(intelhaddata);
return 0;
}
/**
* hdmi_audio_resume - power management resume function
*
*@haddata: pointer to HAD private data
*
* This function is called by client driver to resume the
* hdmi audio.
*/
int hdmi_audio_resume(void *haddata)
{
int caps, retval = 0;
struct snd_intelhad *intelhaddata = (struct snd_intelhad *)haddata;
unsigned long flag_irqs;
pr_debug("Enter:%s", __func__);
spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irqs);
if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED) {
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
pr_debug("had not connected\n");
return 0;
}
if (HAD_DRV_SUSPENDED != intelhaddata->drv_status) {
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
pr_err("had is not in suspended state\n");
return 0;
}
if (had_get_hwstate(intelhaddata)) {
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
pr_err("Failed to resume. Device not accessible\n");
return -ENODEV;
}
intelhaddata->drv_status = HAD_DRV_CONNECTED;
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
/* ToDo: Need to enable UNDERRUN interrupts as well
caps = HDMI_AUDIO_UNDERRUN | HDMI_AUDIO_BUFFER_DONE;
*/
caps = HDMI_AUDIO_BUFFER_DONE;
retval = had_set_caps(HAD_SET_ENABLE_AUDIO_INT, &caps);
retval = had_set_caps(HAD_SET_ENABLE_AUDIO, NULL);
pr_debug("Exit:%s", __func__);
return retval;
}
/**
* snd_intelhad_pcm_trigger - stream activities are handled here
* @substream:substream for which the stream function is called
* @cmd:the stream commamd thats requested from upper layer
* This function is called whenever an a stream activity is invoked
*/
static int snd_intelhad_pcm_trigger(struct snd_pcm_substream *substream,
int cmd)
{
int caps, retval = 0;
unsigned long flag_irq;
struct snd_intelhad *intelhaddata;
struct had_stream_pvt *stream;
struct had_pvt_data *had_stream;
intelhaddata = snd_pcm_substream_chip(substream);
stream = substream->runtime->private_data;
had_stream = intelhaddata->private_data;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
pr_debug("Trigger Start\n");
/* Disable local INTRs till register prgmng is done */
if (had_get_hwstate(intelhaddata)) {
pr_err("_START: HDMI cable plugged-out\n");
retval = -ENODEV;
break;
}
stream->stream_status = STREAM_RUNNING;
spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irq);
had_stream->stream_type = HAD_RUNNING_STREAM;
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irq);
/* Enable Audio */
/* ToDo: Need to enable UNDERRUN interrupts as well
caps = HDMI_AUDIO_UNDERRUN | HDMI_AUDIO_BUFFER_DONE;
*/
caps = HDMI_AUDIO_BUFFER_DONE;
retval = had_set_caps(HAD_SET_ENABLE_AUDIO_INT, &caps);
retval = had_set_caps(HAD_SET_ENABLE_AUDIO, NULL);
had_read_modify(AUD_CONFIG, 1, BIT(0));
pr_debug("Processed _Start\n");
break;
case SNDRV_PCM_TRIGGER_STOP:
pr_debug("Trigger Stop\n");
spin_lock_irqsave(&intelhaddata->had_spinlock, flag_irq);
intelhaddata->stream_info.str_id = 0;
intelhaddata->curr_buf = 0;
/* Stop reporting BUFFER_DONE/UNDERRUN to above layers*/
had_stream->stream_type = HAD_INIT;
spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irq);
/* Disable Audio */
/* ToDo: Need to disable UNDERRUN interrupts as well
caps = HDMI_AUDIO_UNDERRUN | HDMI_AUDIO_BUFFER_DONE;
*/
caps = HDMI_AUDIO_BUFFER_DONE;
had_set_caps(HAD_SET_DISABLE_AUDIO_INT, &caps);
had_set_caps(HAD_SET_DISABLE_AUDIO, NULL);
had_read_modify(AUD_CONFIG, 0, BIT(0));
/* Reset buffer pointers */
had_write_register(AUD_HDMI_STATUS, 1);
had_write_register(AUD_HDMI_STATUS, 0);
stream->stream_status = STREAM_DROPPED;
break;
default:
retval = -EINVAL;
}
return retval;
}
