diff options
| author | Takashi Iwai <tiwai@suse.de> | 2006-02-16 21:51:10 +0300 |
|---|---|---|
| committer | Jaroslav Kysela <perex@suse.cz> | 2006-03-22 12:30:14 +0300 |
| commit | 1a56f8d662ec7fc86f2c408d289fa07cdb781746 (patch) | |
| tree | 98093268b0feacbb9d69492113a688dfedacaf4f /sound | |
| parent | 111d3af5f5fbf0e28570f1c01e83444d73c68a25 (diff) | |
| download | linux-1a56f8d662ec7fc86f2c408d289fa07cdb781746.tar.xz | |
[ALSA] hda-intel - Auto-correction of the DMA position mode
Modules: HDA Intel driver
Switch the method to measure the current DMA position automatically
from position-buffer mode to LPIB-read mode with a sanity check.
Some hardwares seems to have problem with the position buffer.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/hda/hda_intel.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 016fbc263e55..c096606970ff 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -250,7 +250,6 @@ struct azx_dev { unsigned int fragsize; /* size of each period in bytes */ unsigned int frags; /* number for period in the play buffer */ unsigned int fifo_size; /* FIFO size */ - unsigned int last_pos; /* last updated period position */ void __iomem *sd_addr; /* stream descriptor pointer */ @@ -261,10 +260,11 @@ struct azx_dev { unsigned int format_val; /* format value to be set in the controller and the codec */ unsigned char stream_tag; /* assigned stream */ unsigned char index; /* stream index */ + /* for sanity check of position buffer */ + unsigned int period_intr; unsigned int opened: 1; unsigned int running: 1; - unsigned int period_updating: 1; }; /* CORB/RIRB */ @@ -804,11 +804,10 @@ static irqreturn_t azx_interrupt(int irq, void* dev_id, struct pt_regs *regs) if (status & azx_dev->sd_int_sta_mask) { azx_sd_writeb(azx_dev, SD_STS, SD_INT_MASK); if (azx_dev->substream && azx_dev->running) { - azx_dev->period_updating = 1; + azx_dev->period_intr++; spin_unlock(&chip->reg_lock); snd_pcm_period_elapsed(azx_dev->substream); spin_lock(&chip->reg_lock); - azx_dev->period_updating = 0; } } } @@ -1119,7 +1118,6 @@ static int azx_pcm_prepare(struct snd_pcm_substream *substream) azx_dev->fifo_size = azx_sd_readw(azx_dev, SD_FIFOSIZE) + 1; else azx_dev->fifo_size = 0; - azx_dev->last_pos = 0; return hinfo->ops.prepare(hinfo, apcm->codec, azx_dev->stream_tag, azx_dev->format_val, substream); @@ -1167,10 +1165,20 @@ static snd_pcm_uframes_t azx_pcm_pointer(struct snd_pcm_substream *substream) struct azx_dev *azx_dev = get_azx_dev(substream); unsigned int pos; - if (chip->position_fix == POS_FIX_POSBUF) { + if (chip->position_fix == POS_FIX_POSBUF || + chip->position_fix == POS_FIX_AUTO) { /* use the position buffer */ pos = *azx_dev->posbuf; + if (chip->position_fix == POS_FIX_AUTO && + azx_dev->period_intr == 1 && ! pos) { + printk(KERN_WARNING + "hda-intel: Invalid position buffer, " + "using LPIB read method instead.\n"); + chip->position_fix = POS_FIX_NONE; + goto read_lpib; + } } else { + read_lpib: /* read LPIB */ pos = azx_sd_readl(azx_dev, SD_LPIB); if (chip->position_fix == POS_FIX_FIFO) @@ -1441,7 +1449,7 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci, chip->irq = -1; chip->driver_type = driver_type; - chip->position_fix = position_fix ? position_fix : POS_FIX_POSBUF; + chip->position_fix = position_fix; chip->single_cmd = single_cmd; #if BITS_PER_LONG != 64 |