On Tue, 2018-06-12 at 09:44 +0200, Lauda, Tomasz wrote:
Xiuli/Liam/Tomasz,
There is a regression due to the set of the bootloader patches on my up squared board. The audio is distorted now.
I reverted these patches and I could hear clean audio.
- Keqiao who may reported similar issue on UP^2.
Hi Keqiao, can you check what Ranjani founded?
Thanks, ~Keyon
Glitches are probably due to the problem with Host DMA not exiting L1 state on time. Bootloader patch enabled L1 cache on APL, so that's why you are seeing the problem now. It will be fixed after my pm_runtime patch will go through.
This may probably also benefit with the new HDA DMA GW optimal programming flow that Marcin has suggested too.
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