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| author | Takashi Iwai <tiwai@suse.de> | 2021-10-17 09:48:58 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2021-10-18 13:32:12 +0200 |
| commit | 73325f60e2ed28f04032d43c2828b73776cfefd0 (patch) | |
| tree | cd1f8757a850644c6d876e130c724131033d429d /include/sound/memalloc.h | |
| parent | a25684a956468ee8bbbee44649e41e5d447e5adc (diff) | |
| download | lwn-73325f60e2ed28f04032d43c2828b73776cfefd0.tar.gz lwn-73325f60e2ed28f04032d43c2828b73776cfefd0.zip | |
ALSA: memalloc: Support for non-coherent page allocation
Following to the addition of non-contiguous pages, this patch adds the
new contiguous non-coherent page allocation to the standard memalloc
helper. Like the previous non-contig type, this non-coherent type is
also directional and requires the explicit sync, too. Hence the
driver using this type of buffer may need to set
SNDRV_PCM_INFO_EXPLICIT_SYNC flag to the PCM hardware.info as well,
unless it's set up in the managed mode.
Link: https://lore.kernel.org/r/20211017074859.24112-3-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/sound/memalloc.h')
| -rw-r--r-- | include/sound/memalloc.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/sound/memalloc.h b/include/sound/memalloc.h index 1457eba1ac53..0bdaa6753282 100644 --- a/include/sound/memalloc.h +++ b/include/sound/memalloc.h @@ -50,6 +50,7 @@ struct snd_dma_device { #endif #define SNDRV_DMA_TYPE_VMALLOC 7 /* vmalloc'ed buffer */ #define SNDRV_DMA_TYPE_NONCONTIG 8 /* non-coherent SG buffer */ +#define SNDRV_DMA_TYPE_NONCOHERENT 9 /* non-coherent buffer */ /* * info for buffer allocation |