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| author | Sugar Zhang <sugar.zhang@rock-chips.com> | 2021-09-23 13:50:46 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-09-27 15:01:13 +0300 |
| commit | b0e3b0a7078d71455747025e7deee766d4d43432 (patch) | |
| tree | 0b138b1e7fec57fdf81a7a2b26b6295ed5959241 /sound/soc/soc-generic-dmaengine-pcm.c | |
| parent | d0900042522345ed51127d787f02e1171e110e27 (diff) | |
| download | linux-b0e3b0a7078d71455747025e7deee766d4d43432.tar.xz | |
ASoC: dmaengine: Introduce module option prealloc_buffer_size_kbytes
Currently, The fixed 512KB prealloc buffer size is too larger for
tiny memory kernel (such as 16MB memory). This patch adds the module
option "prealloc_buffer_size_kbytes" to specify prealloc buffer size.
It's suitable for cards which use the generic dmaengine pcm driver
with no config.
Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Link: https://lore.kernel.org/r/1632394246-59341-1-git-send-email-sugar.zhang@rock-chips.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/soc-generic-dmaengine-pcm.c')
| -rw-r--r-- | sound/soc/soc-generic-dmaengine-pcm.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sound/soc/soc-generic-dmaengine-pcm.c b/sound/soc/soc-generic-dmaengine-pcm.c index 4aa48c74f21a..c54c8ca8d715 100644 --- a/sound/soc/soc-generic-dmaengine-pcm.c +++ b/sound/soc/soc-generic-dmaengine-pcm.c @@ -15,6 +15,10 @@ #include <sound/dmaengine_pcm.h> +static unsigned int prealloc_buffer_size_kbytes = 512; +module_param(prealloc_buffer_size_kbytes, uint, 0444); +MODULE_PARM_DESC(prealloc_buffer_size_kbytes, "Preallocate DMA buffer size (KB)."); + /* * The platforms dmaengine driver does not support reporting the amount of * bytes that are still left to transfer. @@ -237,7 +241,7 @@ static int dmaengine_pcm_new(struct snd_soc_component *component, prealloc_buffer_size = config->prealloc_buffer_size; max_buffer_size = config->pcm_hardware->buffer_bytes_max; } else { - prealloc_buffer_size = 512 * 1024; + prealloc_buffer_size = prealloc_buffer_size_kbytes * 1024; max_buffer_size = SIZE_MAX; } |