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https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
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[ALSA] aica - fix behaviour in poor resource conditions
Fix behaviour in poor resource conditions. With this new patch, tidied with indent and with SNDRV_PCM_TRIGGER_STOP being used. Signed-off by: Adrian McMenamin <adrian@mcmen.demon.co.uk> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Takashi Iwai
Jaroslav Kysela
parent
43bbb6ccc6
commit
d20b9b20e5
2 changed files with 37 additions and 46 deletions
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@ -64,12 +64,6 @@ module_param(enable, bool, 0644);
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MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
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/* Use workqueue */
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static struct spu_work_holder {
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struct work_struct spu_dma_work;
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void *sspointer;
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} spu_working;
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static struct workqueue_struct *aica_queue;
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/* Simple platform device */
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@ -100,9 +94,9 @@ static void spu_write_wait(void)
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break;
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/* To ensure hardware failure doesn't wedge kernel */
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time_count++;
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if (time_count > 0x10000)
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{
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snd_printk("WARNING: G2 FIFO appears to be blocked.\n");
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if (time_count > 0x10000) {
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snd_printk
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("WARNING: G2 FIFO appears to be blocked.\n");
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break;
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}
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}
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@ -226,11 +220,11 @@ static int aica_dma_transfer(int channels, int buffer_size,
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runtime = substream->runtime;
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for (q = 0; q < channels; q++) {
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err = dma_xfer(AICA_DMA_CHANNEL,
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(unsigned long)(runtime->dma_area +
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(AICA_BUFFER_SIZE * q) /
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channels +
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AICA_PERIOD_SIZE *
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period_offset),
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(unsigned long) (runtime->dma_area +
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(AICA_BUFFER_SIZE * q) /
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channels +
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AICA_PERIOD_SIZE *
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period_offset),
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AICA_CHANNEL0_OFFSET + q * CHANNEL_OFFSET +
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AICA_PERIOD_SIZE * period_offset,
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buffer_size / channels, AICA_DMA_MODE);
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@ -244,26 +238,25 @@ static int aica_dma_transfer(int channels, int buffer_size,
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static void startup_aica(struct snd_card_aica *dreamcastcard)
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{
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spu_memload(AICA_CHANNEL0_CONTROL_OFFSET,
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dreamcastcard->channel,
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sizeof(struct aica_channel));
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dreamcastcard->channel, sizeof(struct aica_channel));
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aica_chn_start();
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}
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static void run_spu_dma(struct work_struct *work)
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{
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int buffer_size;
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struct snd_pcm_substream *substream;
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struct snd_pcm_runtime *runtime;
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struct snd_card_aica *dreamcastcard;
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struct spu_work_holder *holder = container_of(work, struct spu_work_holder, spu_dma_work);
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substream = holder-> sspointer;
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dreamcastcard = substream->pcm->private_data;
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runtime = substream->runtime;
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dreamcastcard =
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container_of(work, struct snd_card_aica, spu_dma_work);
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runtime = dreamcastcard->substream->runtime;
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if (unlikely(dreamcastcard->dma_check == 0)) {
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buffer_size = frames_to_bytes(runtime, runtime->buffer_size);
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buffer_size =
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frames_to_bytes(runtime, runtime->buffer_size);
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if (runtime->channels > 1)
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dreamcastcard->channel->flags |= 0x01;
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aica_dma_transfer(runtime->channels, buffer_size, substream);
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aica_dma_transfer(runtime->channels, buffer_size,
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dreamcastcard->substream);
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startup_aica(dreamcastcard);
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dreamcastcard->clicks =
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buffer_size / (AICA_PERIOD_SIZE * runtime->channels);
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@ -271,13 +264,11 @@ static void run_spu_dma(struct work_struct *work)
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} else {
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aica_dma_transfer(runtime->channels,
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AICA_PERIOD_SIZE * runtime->channels,
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substream);
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dreamcastcard->substream);
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snd_pcm_period_elapsed(dreamcastcard->substream);
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dreamcastcard->clicks++;
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if (unlikely(dreamcastcard->clicks >= AICA_PERIOD_NUMBER))
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{
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dreamcastcard->clicks %= AICA_PERIOD_NUMBER;
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}
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mod_timer(&dreamcastcard->timer, jiffies + 1);
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}
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}
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@ -289,7 +280,7 @@ static void aica_period_elapsed(unsigned long timer_var)
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struct snd_pcm_runtime *runtime;
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struct snd_pcm_substream *substream;
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struct snd_card_aica *dreamcastcard;
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substream = (struct snd_pcm_substream *)timer_var;
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substream = (struct snd_pcm_substream *) timer_var;
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runtime = substream->runtime;
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dreamcastcard = substream->pcm->private_data;
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/* Have we played out an additional period? */
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@ -307,27 +298,24 @@ static void aica_period_elapsed(unsigned long timer_var)
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dreamcastcard->current_period = play_period;
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if (unlikely(dreamcastcard->dma_check == 0))
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dreamcastcard->dma_check = 1;
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queue_work(aica_queue, &(spu_working.spu_dma_work));
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queue_work(aica_queue, &(dreamcastcard->spu_dma_work));
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}
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static void spu_begin_dma(struct snd_pcm_substream *substream)
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{
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/* Must be atomic */
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struct snd_card_aica *dreamcastcard;
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struct snd_pcm_runtime *runtime;
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runtime = substream->runtime;
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dreamcastcard = substream->pcm->private_data;
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/* Use queue to do the heavy lifting */
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spu_working.sspointer = substream;
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INIT_WORK(&(spu_working.spu_dma_work), run_spu_dma);
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queue_work(aica_queue, &(spu_working.spu_dma_work));
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/*get the queue to do the work */
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queue_work(aica_queue, &(dreamcastcard->spu_dma_work));
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/* Timer may already be running */
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if (unlikely(dreamcastcard->timer.data)) {
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mod_timer(&dreamcastcard->timer, jiffies + 4);
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return;
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}
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init_timer(&(dreamcastcard->timer));
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dreamcastcard->timer.data = (unsigned long)substream;
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dreamcastcard->timer.data = (unsigned long) substream;
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dreamcastcard->timer.function = aica_period_elapsed;
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dreamcastcard->timer.expires = jiffies + 4;
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add_timer(&(dreamcastcard->timer));
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@ -366,7 +354,9 @@ static int snd_aicapcm_pcm_close(struct snd_pcm_substream
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*substream)
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{
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struct snd_card_aica *dreamcastcard = substream->pcm->private_data;
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del_timer(&dreamcastcard->timer);
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flush_workqueue(aica_queue);
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if (dreamcastcard->timer.data)
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del_timer(&dreamcastcard->timer);
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kfree(dreamcastcard->channel);
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spu_disable();
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return 0;
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@ -385,7 +375,8 @@ static int snd_aicapcm_pcm_hw_params(struct snd_pcm_substream
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{
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/* Allocate a DMA buffer using ALSA built-ins */
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return
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snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
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snd_pcm_lib_malloc_pages(substream,
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params_buffer_bytes(hw_params));
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}
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static int snd_aicapcm_pcm_prepare(struct snd_pcm_substream
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@ -402,15 +393,11 @@ static int snd_aicapcm_pcm_prepare(struct snd_pcm_substream
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static int snd_aicapcm_pcm_trigger(struct snd_pcm_substream
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*substream, int cmd)
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{
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struct snd_card_aica *dreamcastcard;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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spu_begin_dma(substream);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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dreamcastcard = substream->pcm->private_data;
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if (dreamcastcard->timer.data)
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del_timer(&dreamcastcard->timer);
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aica_chn_halt();
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break;
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default:
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@ -444,7 +431,8 @@ static int __init snd_aicapcmchip(struct snd_card_aica
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int err;
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/* AICA has no capture ability */
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err =
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snd_pcm_new(dreamcastcard->card, "AICA PCM", pcm_index, 1, 0, &pcm);
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snd_pcm_new(dreamcastcard->card, "AICA PCM", pcm_index, 1, 0,
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&pcm);
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if (unlikely(err < 0))
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return err;
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pcm->private_data = dreamcastcard;
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@ -524,9 +512,7 @@ static int aica_pcmvolume_put(struct snd_kcontrol *kcontrol,
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dreamcastcard->channel->vol = ucontrol->value.integer.value[0];
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dreamcastcard->master_volume = ucontrol->value.integer.value[0];
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spu_memload(AICA_CHANNEL0_CONTROL_OFFSET,
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dreamcastcard->channel,
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sizeof(struct aica_channel));
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dreamcastcard->channel, sizeof(struct aica_channel));
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return 1;
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}
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@ -610,6 +596,8 @@ static int __init snd_aica_probe(struct platform_device *devptr)
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strcpy(dreamcastcard->card->shortname, SND_AICA_DRIVER);
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strcpy(dreamcastcard->card->longname,
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"Yamaha AICA Super Intelligent Sound Processor for SEGA Dreamcast");
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/* Prepare to use the queue */
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INIT_WORK(&(dreamcastcard->spu_dma_work), run_spu_dma);
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/* Load the PCM 'chip' */
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err = snd_aicapcmchip(dreamcastcard, 0);
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if (unlikely(err < 0))
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@ -663,8 +651,10 @@ static int __init aica_init(void)
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static void __exit aica_exit(void)
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{
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/* Destroy the aica kernel thread */
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destroy_workqueue(aica_queue);
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/* Destroy the aica kernel thread *
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* being extra cautious to check if it exists*/
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if (likely(aica_queue))
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destroy_workqueue(aica_queue);
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platform_device_unregister(pd);
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platform_driver_unregister(&snd_aica_driver);
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/* Kill any sound still playing and reset ARM7 to safe state */
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@ -69,6 +69,7 @@ struct aica_channel {
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};
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struct snd_card_aica {
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struct work_struct spu_dma_work;
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struct snd_card *card;
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struct aica_channel *channel;
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struct snd_pcm_substream *substream;
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