On Wed, May 20, 2020 at 12:02:25AM -0700, Jeff Kirsher wrote: > From: Ranjani Sridharan <ranjani.sridharan@xxxxxxxxxxxxxxx> > > A client in the SOF (Sound Open Firmware) context is a > device that needs to communicate with the DSP via IPC > messages. The SOF core is responsible for serializing the > IPC messages to the DSP from the different clients. One > example of an SOF client would be an IPC test client that > floods the DSP with test IPC messages to validate if the > serialization works as expected. Multi-client support will > also add the ability to split the existing audio cards > into multiple ones, so as to e.g. to deal with HDMI with a > dedicated client instead of adding HDMI to all cards. > > This patch introduces descriptors for SOF client driver > and SOF client device along with APIs for registering > and unregistering a SOF client driver, sending IPCs from > a client device and accessing the SOF core debugfs root entry. > > Along with this, add a couple of new members to struct > snd_sof_dev that will be used for maintaining the list of > clients. Here is where you are first using a virtual bus driver, and yet, no mention of that at all in the changelog. Why? Why are virtual devices/busses even needed here? greg k-h
