AcoSail/kernel_optimize_test
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ALSA: hda - check page continuity

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Check the continuity of allocated pages to reduce the BDL size as much
as possible so that it can use more than 1MB buffers.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Takashi Iwai 2008-07-30 15:13:34 +02:00 committed by Jaroslav Kysela
parent 51e9f2e665
commit fc4abee811
1 changed files with 2 additions and 4 deletions
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6
sound/pci/hda/hda_intel.c
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@ -1012,9 +1012,7 @@ static int setup_bdle(struct snd_pcm_substream *substream,
bdl[0] = cpu_to_le32((u32)addr);
bdl[1] = cpu_to_le32(upper_32_bits(addr));
/* program the size field of the BDL entry */
chunk = PAGE_SIZE - (ofs % PAGE_SIZE);
if (size < chunk)
chunk = size;
chunk = snd_pcm_sgbuf_get_chunk_size(substream, ofs, size);
bdl[2] = cpu_to_le32(chunk);
/* program the IOC to enable interrupt
* only when the whole fragment is processed
@ -1672,7 +1670,7 @@ static int __devinit create_codec_pcm(struct azx *chip, struct hda_codec *codec,
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &azx_pcm_ops);
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
snd_dma_pci_data(chip->pci),
1024 * 64, 1024 * 1024);
1024 * 64, 32 * 1024 * 1024);
chip->pcm[cpcm->device] = pcm;
return 0;
}