diff options
| author | Haynes Mathew George <hgeorge@codeaurora.org> | 2017-04-27 17:30:03 -0700 |
|---|---|---|
| committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2017-07-06 15:23:56 -0700 |
| commit | a1170b1aecf33507bbf1a479367a86c9d83d0080 (patch) | |
| tree | 3c26547e40f1595bd514e9e97442be20b5043e38 /include/uapi/sound | |
| parent | e868dcc8bbe582a3ac9e859c8fd8db54f4e25813 (diff) | |
ASoC: msm: Add hwdep node for NOIRQ FE
ALSA lacks support to accept shared memory supplied
from userspace. But some usecases need to get a shareable
file descriptor for the dma buffer. As an alternate
to adding custom ioctls to the ALSA framework, use
a hwdep node to get a file descriptor to the underlying dma buffer.
Maintain compat mode as well.
CRs-Fixed: 2041151
Change-Id: Id783bb84e8ef59b28e42d982903971625577b9a3
Signed-off-by: Haynes Mathew George <hgeorge@codeaurora.org>
Diffstat (limited to 'include/uapi/sound')
| -rw-r--r-- | include/uapi/sound/devdep_params.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/include/uapi/sound/devdep_params.h b/include/uapi/sound/devdep_params.h index 5061ec0da356..9e3133b76c68 100644 --- a/include/uapi/sound/devdep_params.h +++ b/include/uapi/sound/devdep_params.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2013-2015, The Linux Foundation. All rights reserved. + * Copyright (c) 2013-2015,2017, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -66,4 +66,14 @@ struct dts_eagle_param_desc { uint32_t device; } __packed; +#define HWDEP_FE_BASE 3000 /*unique base for FE hw dep nodes*/ +struct snd_pcm_mmap_fd { + int32_t dir; + int32_t fd; + int32_t size; + int32_t actual_size; +}; + +#define SNDRV_PCM_IOCTL_MMAP_DATA_FD _IOWR('U', 0xd2, struct snd_pcm_mmap_fd) + #endif |