ALSA: hda - check page continuity

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>

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index e4d038f..4f80248 100644 (file)
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -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;
 }