[PATCH 4/9] ASoC: sun8i-codec: Add support for A64 SoC

On Tue, Dec 5, 2017 at 12:04 AM, Maxime Ripard
[off-list ref] wrote:

On Sun, Dec 03, 2017 at 12:41:52PM -0800, Vasily Khoruzhick wrote:

quoted

Digital part of audio codec block in the A64 is very similar to what
is used by the A33(sun8i) devices. However, it uses different LRCK
divider.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>

What makes it impossible to derive from the sample rate and number of
channels?

It's BCLK / LRCK ratio as per A64 user manual, so it doesn't depend on
sample rate. BSP driver always uses a fixed value of 64 here.

Have you tried other sampling rates?

I tried speaker-test with a number of sampling rates and had no
issues. I couldn't try it in mono, since sun4i-i2s supports minimum of
2 channels.

Maxime

--
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com