diff options
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/hda/hda_intel.c | 91 |
1 files changed, 88 insertions, 3 deletions
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 4f80248837e..52a3adfac7f 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -286,6 +286,11 @@ enum { #define INTEL_SCH_HDA_DEVC 0x78 #define INTEL_SCH_HDA_DEVC_NOSNOOP (0x1<<11) +/* Define IN stream 0 FIFO size offset in VIA controller */ +#define VIA_IN_STREAM0_FIFO_SIZE_OFFSET 0x90 +/* Define VIA HD Audio Device ID*/ +#define VIA_HDAC_DEVICE_ID 0x3288 + /* */ @@ -317,6 +322,12 @@ struct azx_dev { unsigned int running :1; unsigned int irq_pending :1; unsigned int irq_ignore :1; + /* + * For VIA: + * A flag to ensure DMA position is 0 + * when link position is not greater than FIFO size + */ + unsigned int insufficient :1; }; /* CORB/RIRB */ @@ -379,6 +390,7 @@ struct azx { unsigned int polling_mode :1; unsigned int msi :1; unsigned int irq_pending_warned :1; + unsigned int via_dmapos_patch :1; /* enable DMA-position fix for VIA */ /* for debugging */ unsigned int last_cmd; /* last issued command (to sync) */ @@ -818,6 +830,11 @@ static void azx_int_clear(struct azx *chip) /* start a stream */ static void azx_stream_start(struct azx *chip, struct azx_dev *azx_dev) { + /* + * Before stream start, initialize parameter + */ + azx_dev->insufficient = 1; + /* enable SIE */ azx_writeb(chip, INTCTL, azx_readb(chip, INTCTL) | (1 << azx_dev->index)); @@ -1148,7 +1165,8 @@ static int azx_setup_controller(struct azx *chip, struct azx_dev *azx_dev) /* enable the position buffer */ if (chip->position_fix == POS_FIX_POSBUF || - chip->position_fix == POS_FIX_AUTO) { + chip->position_fix == POS_FIX_AUTO || + chip->via_dmapos_patch) { if (!(azx_readl(chip, DPLBASE) & ICH6_DPLBASE_ENABLE)) azx_writel(chip, DPLBASE, (u32)chip->posbuf.addr | ICH6_DPLBASE_ENABLE); @@ -1504,13 +1522,71 @@ static int azx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) return 0; } +/* get the current DMA position with correction on VIA chips */ +static unsigned int azx_via_get_position(struct azx *chip, + struct azx_dev *azx_dev) +{ + unsigned int link_pos, mini_pos, bound_pos; + unsigned int mod_link_pos, mod_dma_pos, mod_mini_pos; + unsigned int fifo_size; + + link_pos = azx_sd_readl(azx_dev, SD_LPIB); + if (azx_dev->index >= 4) { + /* Playback, no problem using link position */ + return link_pos; + } + + /* Capture */ + /* For new chipset, + * use mod to get the DMA position just like old chipset + */ + mod_dma_pos = le32_to_cpu(*azx_dev->posbuf); + mod_dma_pos %= azx_dev->period_bytes; + + /* azx_dev->fifo_size can't get FIFO size of in stream. + * Get from base address + offset. + */ + fifo_size = readw(chip->remap_addr + VIA_IN_STREAM0_FIFO_SIZE_OFFSET); + + if (azx_dev->insufficient) { + /* Link position never gather than FIFO size */ + if (link_pos <= fifo_size) + return 0; + + azx_dev->insufficient = 0; + } + + if (link_pos <= fifo_size) + mini_pos = azx_dev->bufsize + link_pos - fifo_size; + else + mini_pos = link_pos - fifo_size; + + /* Find nearest previous boudary */ + mod_mini_pos = mini_pos % azx_dev->period_bytes; + mod_link_pos = link_pos % azx_dev->period_bytes; + if (mod_link_pos >= fifo_size) + bound_pos = link_pos - mod_link_pos; + else if (mod_dma_pos >= mod_mini_pos) + bound_pos = mini_pos - mod_mini_pos; + else { + bound_pos = mini_pos - mod_mini_pos + azx_dev->period_bytes; + if (bound_pos >= azx_dev->bufsize) + bound_pos = 0; + } + + /* Calculate real DMA position we want */ + return bound_pos + mod_dma_pos; +} + static unsigned int azx_get_position(struct azx *chip, struct azx_dev *azx_dev) { unsigned int pos; - if (chip->position_fix == POS_FIX_POSBUF || - chip->position_fix == POS_FIX_AUTO) { + if (chip->via_dmapos_patch) + pos = azx_via_get_position(chip, azx_dev); + else if (chip->position_fix == POS_FIX_POSBUF || + chip->position_fix == POS_FIX_AUTO) { /* use the position buffer */ pos = le32_to_cpu(*azx_dev->posbuf); } else { @@ -1946,6 +2022,15 @@ static int __devinit check_position_fix(struct azx *chip, int fix) { const struct snd_pci_quirk *q; + /* Check VIA HD Audio Controller exist */ + if (chip->pci->vendor == PCI_VENDOR_ID_VIA && + chip->pci->device == VIA_HDAC_DEVICE_ID) { + chip->via_dmapos_patch = 1; + /* Use link position directly, avoid any transfer problem. */ + return POS_FIX_LPIB; + } + chip->via_dmapos_patch = 0; + if (fix == POS_FIX_AUTO) { q = snd_pci_quirk_lookup(chip->pci, position_fix_list); if (q) { |