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>

1 files changed, 2 insertions, 4 deletions

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index e4d038f423fc..4f80248837e5 100644
--- 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;
 }