sDMA on i.mx7d
From: Alexandre Belloni <hidden>
Date: 2017-02-16 10:42:29
On 15/02/2017 at 14:44:12 -0800, Stefan Agner wrote:
Compiled v4.9 and played a song, I could clearly hear constant "noise"
during playback.
I went back to my v4.8-rc3 + some patches applied back when I tested
audio and submitted the device tree change, and the noise isn't there.
In a "I feel lucky" manor I just reverted the last patch 5881826ded79
("dmaengine: imx-sdma - update the residue calculation for cyclic
channels") and the song sounded clean as always again!
Alexandre, does reverting this helps your issue too?I confirm it is the culprit.
+Nandor, Author of said patch. Any idea?
-- Alexandre Belloni, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com