4538c185 - iio: buffer-dmaengine: Report buffer length requirements

Wed, 11 Dec 2019 11:56:15 +0000

iio: buffer-dmaengine: Report buffer length requirementsThe dmaengine buffer has some length alignment requirements that can differfrom platform to platform. If the length alignment requirements are not metunexpected behavior like dropping of samples can occur.Currently these requirements are not reported and applications need to knowthe requirements of the platform by some out-of-band means.Add a new buffer attribute that reports the length alignment requirementscalled `length_align_bytes`. The reported length alignment is in bytes thatmeans the buffer length alignment in sample sets depends on the number ofenabled channels and the bytes per channel. Applications using thisattribute to determine the buffer size requirements need to consider this.Signed-off-by: Lars-Peter Clausen Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron List of files: /linux-6.15/Documentation/ABI/testing/sysfs-bus-iio-dma-buffer

Changes in sysfs-bus-iio-dma-buffer

4538c185 - iio: buffer-dmaengine: Report buffer length requirements