** Summary changed: - To add DMIC support to oem-kernel + Add DMIC support to oem-kernel
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem in Ubuntu. https://bugs.launchpad.net/bugs/1826181 Title: Add DMIC support to oem-kernel Status in HWE Next: New Status in linux-oem package in Ubuntu: New Bug description: - Need to port Intel's 5.0 kernel branch to (Disco) oem-kernel for DMIC (digital MIC) support in some OEM platforms To support digital mic which is directly connected to PCH, Intel recommend Dell and us to use sound:asoc:sof driver. This driver is under upstreaming, so far, only part of the driver is merged to ASoC's tree. Dell already have a couple of laptop models which connect the dmic to PCH, and Dell pushed Intel to prepare a workable sof driver under v5.0 branch, and pused us to integrate this driver, then the dmic can work on those laptop models. (Lenovo also have 2 laptops which has this dmic design) According to Intel's estimation, the whole sof driver can't be upstreamed in a short of period. So Intel provided a branch which contains some upstreamed patches and some not-yet patches. Intel tested the provided branch, and looks the testing result is good. PLease access https://people.canonical.com/~hwang4/sof-doc/ to get the testing result. I also made a simple test after oem-d merged those patches, I didn't find big issues too. There are some patches which touched the common code or the code of other subsystems. Intel said it is safe, and I also looked at those patches, I also think it is safe. But because there are too many changes, let us put this driver into the OEM-D kernel, this driver will not merge to generic kernel. [Impact] Our OEM project need to enable a couple of laptops which connect the dmic directly to the PCH, there is no driver for this design in the linux kernel, so we need to integrate Intel's sof driver. [Fix] Intel provided a sof driver tree based on v5.0, it is for oem-d kernel [Test Case] Intel tested the audio functions, the testing result is good. https://people.canonical.com/~hwang4/sof-doc/Beta%20Test%20Report%20-%20Dell%20Mantis%20(CML)%20%20-%20Apr%2030.pdf I also made a simple test, speaker, headphone, dmic and headset-mic worked. [Regression Risk] Low. So far both Intel side and I have not found any regression introduced by this patchset, and to lower the risk, we only integrate the driver to oem-d kernel, and after the image is ready, the oem project will perform the full-range test. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1826181/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
