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| author | Takashi Iwai <tiwai@suse.de> | 2018-08-08 22:23:30 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2018-08-28 13:56:47 +0200 |
| commit | fc478143693d8750dca5e35d03d497bdd0202b3f (patch) | |
| tree | 7cb5ecbc2ef070c9746ebcf35017f7bb62ab593e /sound/pci/hda/hda_controller.c | |
| parent | ALSA: hda: Check the non-cached stream buffers more explicitly (diff) | |
| download | linux-fc478143693d8750dca5e35d03d497bdd0202b3f.tar.xz linux-fc478143693d8750dca5e35d03d497bdd0202b3f.zip | |
ALSA: hda: Use new non-cached allocation for non-snoop mode
Now the ALSA memory allocator helper supports the new non-cached
pages, let's use the new type, SNDRV_DMA_TYPE_DEV_UC_SG, for HD-audio
driver. This allows us to reduce lots of codes.
As another positive side-effect by this patch, the long-standing issue
with non-snoop mode playing in the non-mmap mode is fixed. The core
memalloc helper does the proper pgprot setup for non-cached pages for
vmap(), which was missing in the past.
Reported-and-tested-by: Hans Hu <HansHu@zhaoxin.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/hda/hda_controller.c')
| -rw-r--r-- | sound/pci/hda/hda_controller.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sound/pci/hda/hda_controller.c b/sound/pci/hda/hda_controller.c index a12e594d4e3b..8bc46676c278 100644 --- a/sound/pci/hda/hda_controller.c +++ b/sound/pci/hda/hda_controller.c @@ -732,6 +732,7 @@ int snd_hda_attach_pcm_stream(struct hda_bus *_bus, struct hda_codec *codec, int pcm_dev = cpcm->device; unsigned int size; int s, err; + int type = SNDRV_DMA_TYPE_DEV_SG; list_for_each_entry(apcm, &chip->pcm_list, list) { if (apcm->pcm->device == pcm_dev) { @@ -770,7 +771,9 @@ int snd_hda_attach_pcm_stream(struct hda_bus *_bus, struct hda_codec *codec, size = CONFIG_SND_HDA_PREALLOC_SIZE * 1024; if (size > MAX_PREALLOC_SIZE) size = MAX_PREALLOC_SIZE; - snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG, + if (chip->uc_buffer) + type = SNDRV_DMA_TYPE_DEV_UC_SG; + snd_pcm_lib_preallocate_pages_for_all(pcm, type, chip->card->dev, size, MAX_PREALLOC_SIZE); return 0; |