On Thu, 08 Dec 2022 08:42:00 +0000, Judy Hsiao wrote:

Replace SNDRV_DMA_TYPE_DEV by SNDRV_DMA_TYPE_NONCOHERENT for pcm buffer allocation. We measured about 18x performance improvement when accessing the snd_pcm_mmap() buffer from userspace.

Eg: aarch64 with internal speaker

SNDRV_DMA_TYPE_DEV frames_per_second=66.4557M/s max_time_per_4096_frames=106.094u time_per_4096_frames=61.6351us

[...]

Applied to

broonie/sound.git for-next

Thanks!

[1/1] ASoC: qcom: lpass-platform: Use SNDRV_DMA_TYPE_NONCOHERENT page allocation commit: 01270f905eea786f418cbc2040f7a52b969ef377

All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.

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Thanks, Mark