diff options
Diffstat (limited to 'hda_intel-prealloc-4mb-dmabuffer.patch')
| -rw-r--r-- | hda_intel-prealloc-4mb-dmabuffer.patch | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/hda_intel-prealloc-4mb-dmabuffer.patch b/hda_intel-prealloc-4mb-dmabuffer.patch new file mode 100644 index 000000000..36e6aca4f --- /dev/null +++ b/hda_intel-prealloc-4mb-dmabuffer.patch @@ -0,0 +1,47 @@ +From c69fcbd1f60b0842f7c1ad2c95692ffd19c4932b Mon Sep 17 00:00:00 2001 +From: Kyle McMartin <kyle@phobos.i.jkkm.org> +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 + |