From c69fcbd1f60b0842f7c1ad2c95692ffd19c4932b Mon Sep 17 00:00:00 2001 From: Kyle McMartin Date: Mon, 29 Mar 2010 23:56:08 -0400 Subject: hda_intel-prealloc-4mb-dmabuffer --- sound/pci/hda/hda_intel.c | 14 +++++++++++++- 1 files changed, 13 insertions(+), 1 deletions(-) diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 4bb9067..37db515 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -1986,6 +1986,7 @@ azx_attach_pcm_stream(struct hda_bus *bus, struct hda_codec *codec, struct azx_pcm *apcm; int pcm_dev = cpcm->device; int s, err; + size_t prealloc_min = 64*1024; /* 64KB */ if (pcm_dev >= HDA_MAX_PCMS) { snd_printk(KERN_ERR SFX "Invalid PCM device number %d\n", @@ -2019,10 +2020,21 @@ azx_attach_pcm_stream(struct hda_bus *bus, struct hda_codec *codec, if (cpcm->stream[s].substreams) snd_pcm_set_ops(pcm, s, &azx_pcm_ops); } + /* buffer pre-allocation */ + + /* subtle, don't allocate a big buffer for modems... + * also, don't just test 32BIT_MASK, since azx supports + * 64-bit DMA in some cases. + */ + /* lennart wants a 2.2MB buffer for 2sec of 48khz */ + if (pcm->dev_class == SNDRV_PCM_CLASS_GENERIC && + chip->pci->dma_mask >= DMA_32BIT_MASK) + prealloc_min = 4 * 1024 * 1024; /* 4MB */ + snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG, snd_dma_pci_data(chip->pci), - 1024 * 64, 32 * 1024 * 1024); + prealloc_min, 32 * 1024 * 1024); return 0; } -- 1.7.0.1