APPLIED: [SRU][Focal][PATCH 0/4] alsa/sof: let sof driver work with topology with volume and led control (focal)

[Seth Forshee]

On Mon, Feb 24, 2020 at 09:13:07AM +0800, Hui Wang wrote:
> BugLink: http://bugs.launchpad.net/bugs/1864398
> 
> [Impact]
> In the ubuntu 20.04, we plan to integrate sof-firmware v1.4.2, the
> topology of this version contains volume and led control, we need
> to add this support in the sof driver, otherwise the sof will crash
> when parsing the topology of v1.4.2.  After adding these patches,
> the sof still coudl work with topology without volume and led control.
> 
> [Fix]
> Backported the patches from mainline kernel v5.5-c1
> 
> [Test Case]
> Install the sof-firmware v1.4.2
> boot the kernel with these patches, sof driver initializes successfully,
> and we could get a working sound card after booting up.
> 
> Install the sof-firmware v1.3.1
> boot the kernel with these patches, sof driver initializes successfully,
> and we could get a working sound card after booting up.
> 
> [Regression Risk]
> Low, the patches are backported from upstream kernel, and I tested
> this patch on Lenovo and Dell dmic machines.

Applied to focal/master-next, thanks!