** Description changed:
- Because we introduced this commit from stable patches, but only
- backporting this commit is not enough.
+ In the focal kernel, we backported a commit from the stable patches,
+ that commit make the sof driver fail to work, and even make the system
+ hang randomly.
+ The commit we introduced is:
Author: Ranjani Sridharan <ranjani.sridha...@linux.intel.com>
- Date: Mon Nov 4 14:48:12 2019 -0800
+ Date: Mon Nov 4 14:48:12 2019 -0800
ASoC: SOF: topology: set trigger order for FE DAI link
-
+
BugLink: https://bugs.launchpad.net/bugs/1858428
-
+
[ Upstream commit 5eee2b3f60065a2530d13f28e771be48b989eb4c ]
-
+
Set trigger order for FE DAI links to SND_SOC_DPCM_TRIGGER_POST
to trigger the BE DAI's before the FE DAI's. This prevents the
xruns seen on playback pipelines using the link DMA.
-
+
Signed-off-by: Ranjani Sridharan <ranjani.sridha...@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.boss...@linux.intel.com>
Link:
https://lore.kernel.org/r/20191104224812.3393-3-ranjani.sridha...@linux.intel.com
Signed-off-by: Mark Brown <broo...@kernel.org>
Signed-off-by: Sasha Levin <sas...@kernel.org>
Signed-off-by: Seth Forshee <seth.fors...@canonical.com>
+
+
+ [Impact]
+ Booting the focal kernel on the LENOVO X1 corbon 7th and a Dell
+ machine which has dmic on it, the sof driver print lots of errors
+ even it loaded the firmware and topology conf file correctly, and
+ the sof driver fails to initializaton, after booting up, we run:
+ aplay -l, it print out that there is no soundcard. And the system
+ randomly hang.
+
+ [Fix]
+ We backported a patch from stable kernel, that is not enough, the
+ submitter of that patch sent 2 patches out, the stable kernel only
+ integrated the 2nd one, to fix this problem, let's integrate the
+ 1st one as well.
+
+
+ [Test Case]
+ After applied all patches, the sof driver worked well, all audio
+ functions worked well, and the system didn't hang randomly anymore.
+
+ [Regression Risk]
+ Low, these two patches fix FB/BE order issue, we should backport them
+ together. And I have tested the patches on a LENOVO and a Dell machine,
+ all worked well.
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https://bugs.launchpad.net/bugs/1862736
Title:
sof driver fails and print lots of errors in the dmesg (focal)
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