On 2020-03-18 07:30, Dominik Brodowski wrote:
Hi!
While 5.5.x works fine, mainline as of ac309e7744be (v5.6-rc6+) causes me
some sound-related trouble: after boot, the sound works fine -- but once I
suspend and resume my broadwell-based XPS13, I need to switch to headphone
and back to speaker to hear something. But what I hear isn't music but
garbled output.
A few dmesg snippets from v5.6-rc6-9-gac309e7744be which might be of
interest. I've highlighted the lines differing from v.5.5.x which might be
of special interest:
Thank you for the report, Dominik. You definitely got our attention.
I've checked the market: Dell XPS 13 9343, yes? Once you confirm model
id, I'll order a piece immediately to our site.
In regard to logs, thanks for highlighting important lines. Build is of
'rc' so bugs can still be in plenty - any reason for switching to
cutting-edge kernel on production stuff? Our CI didn't detect any
anomalies yet as it is running on 5.5.
I'll direct your ticket on todays meeting. On the first look, issue
seems to be connected with recent changes to /drivers/dma/dmaengine.c.
DesignWare DMA controller drv - which HSW/BDW makes use of - might not
have been updated accordingly. Will dig further on that.
One more, just to make it clear for the rest of the viewers:
> haswell-pcm-audio haswell-pcm-audio: Direct firmware load for
intel/IntcPP01.bin failed with error -2
> haswell-pcm-audio haswell-pcm-audio: fw image intel/IntcPP01.bin not
available(-2)
Back in the ancient days of DSP (HSW/BDW are actually the very first
audio DSP hws for Intel) topology was part of FW - SW could not
configure it and probably that's why library IntcPP01 is attempted to be
loaded on every boot, even if it's not part of configuration for given
hw. Maybe we could make it quieter though..
(these last two messages already are printed a couple of time after boot, and then
again during a suspend/resume cycle. On v.5.5.y, there are similar messages
"no context buffer need to restore!"). Everything is built-in, no modules
are loaded.
Unfortunately, I cannot bisect this issue easily -- i915 was broken for
quite some time on this system[*], prohibiting boot...
Hmm, sounds like that issue is quite old. DSP for Haswell and Broadwell
is available for I2S devices only, so this relates directly to legacy
HDA driver. Compared to Skylake+, HDAudio controller for older platforms
is found within GPU. My advice is to notify the DRM guys about this issue.
Takashi, are you aware of problems with HDMI on HSW/ BDW or should I
just loop Jani and other DRM peps here?
Czarek
