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| author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2011-08-04 17:12:56 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2011-08-04 17:44:36 +0200 |
| commit | 2ae66c26550cd94b0e2606a9275eb0ab7070ad0e (patch) | |
| tree | 2822549ce2ef46d1499402139a2d8f484b00a3ff /Documentation/sound | |
| parent | ALSA: hda - Add basic tracepoints (diff) | |
| download | linux-2ae66c26550cd94b0e2606a9275eb0ab7070ad0e.tar.xz linux-2ae66c26550cd94b0e2606a9275eb0ab7070ad0e.zip | |
ALSA: hda: option to enable arbitrary buffer/period sizes
Add new parameter to disable rounding of buffer/period sizes to
multiples of 128 bytes. This is more efficient in terms of memory
access but isn't required by the HDA spec and prevents users from
specifying exact period/buffer sizes. For example for 44.1kHz, a
period size set to 20ms will be rounded to 19.59ms.
Tested and enabled on Intel HDA controllers. Option is disabled by
default for other controllers.
Tested-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'Documentation/sound')
| -rw-r--r-- | Documentation/sound/alsa/ALSA-Configuration.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt index 89757012c7ff..27126c469f70 100644 --- a/Documentation/sound/alsa/ALSA-Configuration.txt +++ b/Documentation/sound/alsa/ALSA-Configuration.txt @@ -886,6 +886,11 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. disable) power_save_controller - Reset HD-audio controller in power-saving mode (default = on) + align_buffer_size - Force rounding of buffer/period sizes to multiples + of 128 bytes. This is more efficient in terms of memory + access but isn't required by the HDA spec and prevents + users from specifying exact period/buffer sizes. + (default = on) This module supports multiple cards and autoprobe. |