mirror of https://gitee.com/openkylin/linux.git
[PATCH] v4l: (930) Alsa fixes and improvements
- Fix nasty IRQ hook bug. - Fix multiple board support in saa7134-alsa - Minor comment updates - SAA7134/ALSA IRQ management improvements - Removed superfluous stop_dma() from saa7134-alsa IRQ handler Signed-off-by: Ricardo Cerqueira <v4l@cerqueira.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ricardo Cerqueira
Linus Torvalds
parent
770599d075
commit
c817e76342
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@ -56,6 +56,8 @@ static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
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module_param_array(index, int, NULL, 0444);
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MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s).");
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int position;
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#define dprintk(fmt, arg...) if (debug) \
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printk(KERN_DEBUG "%s/alsa: " fmt, dev->name , ## arg)
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@ -100,13 +102,11 @@ static snd_card_t *snd_saa7134_cards[SNDRV_CARDS];
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*
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* Called when the capture device is released or the buffer overflows
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*
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* - Copied verbatim from saa7134-oss's dsp_dma_stop. Can be dropped
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* if we just share dsp_dma_stop and use it here
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* - Copied verbatim from saa7134-oss's dsp_dma_stop.
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*
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*/
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static void saa7134_dma_stop(struct saa7134_dev *dev)
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{
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dev->dmasound.dma_blk = -1;
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dev->dmasound.dma_running = 0;
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@ -118,8 +118,7 @@ static void saa7134_dma_stop(struct saa7134_dev *dev)
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*
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* Called when preparing the capture device for use
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*
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* - Copied verbatim from saa7134-oss's dsp_dma_start. Can be dropped
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* if we just share dsp_dma_start and use it here
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* - Copied verbatim from saa7134-oss's dsp_dma_start.
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*
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*/
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@ -171,7 +170,6 @@ void saa7134_irq_alsa_done(struct saa7134_dev *dev, unsigned long status)
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dprintk("irq: overrun [full=%d/%d] - Blocks in %d\n",dev->dmasound.read_count,
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dev->dmasound.bufsize, dev->dmasound.blocks);
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snd_pcm_stop(dev->dmasound.substream,SNDRV_PCM_STATE_XRUN);
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saa7134_dma_stop(dev);
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goto done;
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}
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@ -209,7 +207,8 @@ void saa7134_irq_alsa_done(struct saa7134_dev *dev, unsigned long status)
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static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id, struct pt_regs *regs)
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{
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struct saa7134_dev *dev = (struct saa7134_dev*) dev_id;
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snd_card_saa7134_t *saa7134 = dev_id;
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struct saa7134_dev *dev = saa7134->saadev;
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unsigned long report, status;
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int loop, handled = 0;
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@ -253,18 +252,18 @@ static int snd_card_saa7134_capture_trigger(snd_pcm_substream_t * substream,
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int err = 0;
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spin_lock_irq(&dev->slock);
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if (cmd == SNDRV_PCM_TRIGGER_START) {
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if (cmd == SNDRV_PCM_TRIGGER_START) {
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/* start dma */
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saa7134_dma_start(dev);
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} else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
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} else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
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/* stop dma */
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saa7134_dma_stop(dev);
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} else {
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err = -EINVAL;
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}
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} else {
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err = -EINVAL;
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}
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spin_unlock_irq(&dev->slock);
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return err;
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return err;
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}
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/*
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@ -275,8 +274,8 @@ static int snd_card_saa7134_capture_trigger(snd_pcm_substream_t * substream,
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* Must be called during the preparation stage, before memory is
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* allocated
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*
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* - Copied verbatim from saa7134-oss. Can be dropped
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* if we just share dsp_buffer_conf from OSS.
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* - Copied verbatim from saa7134-oss.
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*
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*/
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static int dsp_buffer_conf(struct saa7134_dev *dev, int blksize, int blocks)
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@ -307,8 +306,8 @@ static int dsp_buffer_conf(struct saa7134_dev *dev, int blksize, int blocks)
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* ALSA, but I was unable to use ALSA's own DMA, and had to force the
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* usage of V4L's
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*
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* - Copied verbatim from saa7134-oss. Can be dropped
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* if we just share dsp_buffer_init from OSS.
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* - Copied verbatim from saa7134-oss.
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*
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*/
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static int dsp_buffer_init(struct saa7134_dev *dev)
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@ -369,7 +368,7 @@ static int snd_card_saa7134_capture_prepare(snd_pcm_substream_t * substream)
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err = dsp_buffer_init(dev);
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if (0 != err)
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goto fail2;
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return err;
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/* prepare buffer */
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if (0 != (err = videobuf_dma_pci_map(dev->pci,&dev->dmasound.dma)))
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@ -560,10 +559,8 @@ static void snd_card_saa7134_runtime_free(snd_pcm_runtime_t *runtime)
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static int snd_card_saa7134_hw_params(snd_pcm_substream_t * substream,
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snd_pcm_hw_params_t * hw_params)
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{
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return 0;
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}
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/*
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@ -790,7 +787,6 @@ static int snd_saa7134_capsrc_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_
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static int snd_saa7134_capsrc_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
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{
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snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
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unsigned long flags;
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int change, addr = kcontrol->private_value;
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int left, right;
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u32 anabar, xbarin;
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@ -801,14 +797,14 @@ static int snd_saa7134_capsrc_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_
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left = ucontrol->value.integer.value[0] & 1;
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right = ucontrol->value.integer.value[1] & 1;
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spin_lock_irqsave(&chip->mixer_lock, flags);
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spin_lock_irq(&chip->mixer_lock);
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change = chip->capture_source[addr][0] != left ||
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chip->capture_source[addr][1] != right;
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chip->capture_source[addr][0] = left;
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chip->capture_source[addr][1] = right;
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dev->dmasound.input=addr;
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spin_unlock_irqrestore(&chip->mixer_lock, flags);
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spin_unlock_irq(&chip->mixer_lock);
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if (change) {
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@ -898,28 +894,33 @@ static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
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return 0;
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}
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static int snd_saa7134_free(snd_card_saa7134_t *chip)
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static void snd_saa7134_free(snd_card_t * card)
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{
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return 0;
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return;
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}
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static int snd_saa7134_dev_free(snd_device_t *device)
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{
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snd_card_saa7134_t *chip = device->device_data;
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return snd_saa7134_free(chip);
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if (chip->irq >= 0) {
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synchronize_irq(chip->irq);
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free_irq(chip->irq, (void *) chip);
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}
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return 0;
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}
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/*
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* ALSA initialization
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*
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* Called by saa7134-core, it creates the basic structures and registers
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* the ALSA devices
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* Called by the init routine, once for each saa7134 device present,
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* it creates the basic structures and registers the ALSA devices
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*
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*/
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int alsa_card_saa7134_create (struct saa7134_dev *saadev)
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int alsa_card_saa7134_create(struct saa7134_dev *saadev, int dev)
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{
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static int dev;
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snd_card_t *card;
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snd_card_saa7134_t *chip;
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@ -934,7 +935,7 @@ int alsa_card_saa7134_create (struct saa7134_dev *saadev)
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if (!enable[dev])
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return -ENODEV;
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card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
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card = snd_card_new(index[dev], id[dev], THIS_MODULE, sizeof(snd_card_saa7134_t));
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if (card == NULL)
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return -ENOMEM;
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@ -943,10 +944,8 @@ int alsa_card_saa7134_create (struct saa7134_dev *saadev)
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/* Card "creation" */
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chip = kcalloc(1, sizeof(*chip), GFP_KERNEL);
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if (chip == NULL) {
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return -ENOMEM;
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}
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card->private_free = snd_saa7134_free;
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chip = (snd_card_saa7134_t *) card->private_data;
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spin_lock_init(&chip->lock);
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spin_lock_init(&chip->mixer_lock);
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@ -960,7 +959,7 @@ int alsa_card_saa7134_create (struct saa7134_dev *saadev)
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chip->iobase = pci_resource_start(saadev->pci, 0);
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err = request_irq(saadev->pci->irq, saa7134_alsa_irq,
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SA_SHIRQ | SA_INTERRUPT, saadev->name, saadev);
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SA_SHIRQ | SA_INTERRUPT, saadev->name, (void *)chip);
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if (err < 0) {
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printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
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@ -993,7 +992,6 @@ int alsa_card_saa7134_create (struct saa7134_dev *saadev)
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__nodev:
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snd_card_free(card);
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kfree(chip);
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return err;
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}
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@ -1007,21 +1005,23 @@ int alsa_card_saa7134_create (struct saa7134_dev *saadev)
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static int saa7134_alsa_init(void)
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{
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struct saa7134_dev *saadev = NULL;
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struct list_head *list;
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struct saa7134_dev *saadev = NULL;
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struct list_head *list;
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printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
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position = 0;
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list_for_each(list,&saa7134_devlist) {
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saadev = list_entry(list, struct saa7134_dev, devlist);
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alsa_card_saa7134_create(saadev);
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}
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printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
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list_for_each(list,&saa7134_devlist) {
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saadev = list_entry(list, struct saa7134_dev, devlist);
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alsa_card_saa7134_create(saadev,position);
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position++;
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}
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if (saadev == NULL)
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printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
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return 0;
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}
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/*
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@ -1064,6 +1064,7 @@ static int __devinit saa7134_initdev(struct pci_dev *pci_dev,
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/* check for signal */
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saa7134_irq_video_intl(dev);
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return 0;
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fail5:
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