diff options
| author | Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> | 2016-06-05 02:47:19 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-06-28 13:52:12 +0300 |
| commit | 447d7c329145989e96cd0a89970a6e009407bad9 (patch) | |
| tree | 78bb2efe54ae5f6b5586c74e987129f9e4b9a700 /drivers/media/pci/tw686x/tw686x-regs.h | |
| parent | c156c54d796f1b926a72a308dc084eec6eaad1c6 (diff) | |
| download | linux-447d7c329145989e96cd0a89970a6e009407bad9.tar.xz | |
[media] tw686x: audio: Allow to configure the period size
Currently, the driver has a fixed period size of 4096 bytes
(2048 frames). Since this hardware can configure the audio
capture size, this commit allows a period size range of [512-4096].
This is very useful to reduce the audio latency.
Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/pci/tw686x/tw686x-regs.h')
| -rw-r--r-- | drivers/media/pci/tw686x/tw686x-regs.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/media/pci/tw686x/tw686x-regs.h b/drivers/media/pci/tw686x/tw686x-regs.h index 37c39bcd7572..15a956642ef4 100644 --- a/drivers/media/pci/tw686x/tw686x-regs.h +++ b/drivers/media/pci/tw686x/tw686x-regs.h @@ -105,6 +105,10 @@ 0x2d0, 0x2d1, 0x2d2, 0x2d3 }) #define SYS_MODE_DMA_SHIFT 13 +#define AUDIO_DMA_SIZE_SHIFT 19 +#define AUDIO_DMA_SIZE_MIN SZ_512 +#define AUDIO_DMA_SIZE_MAX SZ_4K +#define AUDIO_DMA_SIZE_MASK (SZ_8K - 1) #define DMA_CMD_ENABLE BIT(31) #define INT_STATUS_DMA_TOUT BIT(17) |