diff options
| -rw-r--r-- | sound/pci/hda/hda_intel.c | 42 |
1 files changed, 23 insertions, 19 deletions
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index cad9b70..0a6c55b 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -174,7 +174,7 @@ MODULE_DESCRIPTION("Intel HDA driver"); #define ICH6_GSTS_FSTS (1 << 1) /* flush status */ #define ICH6_REG_INTCTL 0x20 #define ICH6_REG_INTSTS 0x24 -#define ICH6_REG_WALCLK 0x30 +#define ICH6_REG_WALLCLK 0x30 /* 24Mhz source */ #define ICH6_REG_SYNC 0x34 #define ICH6_REG_CORBLBASE 0x40 #define ICH6_REG_CORBUBASE 0x44 @@ -340,8 +340,8 @@ struct azx_dev { unsigned int period_bytes; /* size of the period in bytes */ unsigned int frags; /* number for period in the play buffer */ unsigned int fifo_size; /* FIFO size */ - unsigned long start_jiffies; /* start + minimum jiffies */ - unsigned long min_jiffies; /* minimum jiffies before position is valid */ + unsigned long start_wallclk; /* start + minimum wallclk */ + unsigned long period_wallclk; /* wallclk for period */ void __iomem *sd_addr; /* stream descriptor pointer */ @@ -361,7 +361,6 @@ struct azx_dev { unsigned int opened :1; unsigned int running :1; unsigned int irq_pending :1; - unsigned int start_flag: 1; /* stream full start flag */ /* * For VIA: * A flag to ensure DMA position is 0 @@ -1676,8 +1675,9 @@ static int azx_pcm_prepare(struct snd_pcm_substream *substream) return err; } - azx_dev->min_jiffies = (runtime->period_size * HZ) / - (runtime->rate * 2); + /* wallclk has 24Mhz clock source */ + azx_dev->period_wallclk = (((runtime->period_size * 24000) / + runtime->rate) * 1000); azx_setup_controller(chip, azx_dev); if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) azx_dev->fifo_size = azx_sd_readw(azx_dev, SD_FIFOSIZE) + 1; @@ -1731,14 +1731,15 @@ static int azx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) if (s->pcm->card != substream->pcm->card) continue; azx_dev = get_azx_dev(s); - if (rstart) { - azx_dev->start_flag = 1; - azx_dev->start_jiffies = jiffies + azx_dev->min_jiffies; - } - if (start) + if (start) { + azx_dev->start_wallclk = azx_readl(chip, WALLCLK); + if (!rstart) + azx_dev->start_wallclk -= + azx_dev->period_wallclk; azx_stream_start(chip, azx_dev); - else + } else { azx_stream_stop(chip, azx_dev); + } azx_dev->running = start; } spin_unlock(&chip->reg_lock); @@ -1885,13 +1886,14 @@ static snd_pcm_uframes_t azx_pcm_pointer(struct snd_pcm_substream *substream) */ static int azx_position_ok(struct azx *chip, struct azx_dev *azx_dev) { + u32 wallclk; unsigned int pos; int stream; - if (azx_dev->start_flag && - time_before_eq(jiffies, azx_dev->start_jiffies)) + wallclk = azx_readl(chip, WALLCLK); + if ((wallclk - azx_dev->start_wallclk) < + (azx_dev->period_wallclk * 2) / 3) return -1; /* bogus (too early) interrupt */ - azx_dev->start_flag = 0; stream = azx_dev->substream->stream; pos = azx_get_position(chip, azx_dev); @@ -1906,13 +1908,12 @@ static int azx_position_ok(struct azx *chip, struct azx_dev *azx_dev) chip->position_fix[stream] = POS_FIX_POSBUF; } - if (!bdl_pos_adj[chip->dev_index]) - return 1; /* no delayed ack */ if (WARN_ONCE(!azx_dev->period_bytes, "hda-intel: zero azx_dev->period_bytes")) return 0; /* this shouldn't happen! */ if (pos % azx_dev->period_bytes > azx_dev->period_bytes / 2) return 0; /* NG - it's below the period boundary */ + azx_dev->start_wallclk = wallclk; return 1; /* OK, it's fine */ } @@ -1922,7 +1923,7 @@ static int azx_position_ok(struct azx *chip, struct azx_dev *azx_dev) static void azx_irq_pending_work(struct work_struct *work) { struct azx *chip = container_of(work, struct azx, irq_pending_work); - int i, pending; + int i, pending, ok; if (!chip->irq_pending_warned) { printk(KERN_WARNING @@ -1941,11 +1942,14 @@ static void azx_irq_pending_work(struct work_struct *work) !azx_dev->substream || !azx_dev->running) continue; - if (azx_position_ok(chip, azx_dev)) { + ok = azx_position_ok(chip, azx_dev); + if (ok > 0) { azx_dev->irq_pending = 0; spin_unlock(&chip->reg_lock); snd_pcm_period_elapsed(azx_dev->substream); spin_lock(&chip->reg_lock); + } else if (ok < 0) { + pending = 0; /* too early */ } else pending++; } |
