CONFIG_SND_HDA_PREALLOC_SIZE: Pre-allocated buffer size for HD-audio driver

General informations

The Linux kernel configuration item CONFIG_SND_HDA_PREALLOC_SIZE has multiple definitions:

Pre-allocated buffer size for HD-audio driver found in sound/hda/Kconfig

The configuration item CONFIG_SND_HDA_PREALLOC_SIZE:

• prompt: Pre-allocated buffer size for HD-audio driver
• type: int
• depends on: (! CONFIG_SND_DMA_SGBUF ) && ( CONFIG_SND_DMA_SGBUF ) && (! CONFIG_SND_DMA_SGBUF )
• defined in sound/hda/Kconfig
• found in Linux kernels: 4.2–4.20, 5.0–5.19, 6.0–6.5, 6.6-rc+HEAD

Help text

Specifies the default pre-allocated buffer-size in kB for the HD-audio driver. A larger buffer (e.g. 2048) is preferred for systems using PulseAudio. The default 64 is chosen just for compatibility reasons. On x86 systems, the default is zero as we need no preallocation.

Note that the pre-allocation size can be changed dynamically via a proc file (/proc/asound/card*/pcm*/sub*/prealloc), too.

Pre-allocated buffer size for HD-audio driver found in sound/pci/hda/Kconfig

The configuration item CONFIG_SND_HDA_PREALLOC_SIZE:

• prompt: Pre-allocated buffer size for HD-audio driver
• type: int
• depends on: (none)
• defined in sound/pci/hda/Kconfig
• found in Linux kernels: 3.1–3.19, 4.0–4.1

Help text

Specifies the default pre-allocated buffer-size in kB for the HD-audio driver. A larger buffer (e.g. 2048) is preferred for systems using PulseAudio. The default 64 is chosen just for compatibility reasons.

Note that the pre-allocation size can be changed dynamically via a proc file (/proc/asound/card*/pcm*/sub*/prealloc), too.

Hardware

LKDDb

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• (none)

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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