ACRN Project Technical Community Meeting Minutes - 05/29/2019
Meeting Minutes Archive: Google doc: https://drive.google.com/drive/u/2/folders/111m6iU3PjSZebOOKzLagYPUWMvseGLeU
ACRN Project TCM - 29th May 2019
Download foil from ACRN Presentation->ACRN_TCM->WW22’19
Q1: GVT-s support multiple users in UOS?
A1: Multiple users support in UOS doesn’t rely on GVT-g
Q2: Can UOS detect virtual display dynamically?
A2: No. Right now GVT-g doesn’t support hot plug in UOS.
Q3: is there any limitation on display resolution?
A3: Yes. To balance the plane numbers and resolution, we had to limit the display resolutions because of limited DDB resource in GPU hardware. Right now we support maximum three monitors with 1080p resolution.
Q4: Is there a monitor and a vdisplay device both in the UOS?
A4: There’s no vdisplay device in UOS. Only a virtual GPU hardware and monitors reported by virtual GPU.
Q5: As far as physical monitor is concerned, how do we switch between display from SOS/UOS-1/UOS-2? Do all of them share the same screen or we need to switch?
A5: The AcrnGT framework doesn’t limit dynamic switch usage, but customers need to modify the code to implement such scenario. For example, users can implement a sysfs node to expose the plane ownership variables so that they can be modify in runtime.
If users want to share one screen, right now, they can set the SOS display on plane 1, UOS display on plane 2, etc.
Q6: does this degrade compositor performance?
A6: Plane restriction will degrade compositor’s performance, because if limited planes exposed to the driver, sometime driver will not be able to leverage the HW composing.
Q7: Do you have a photo of showing displays from SOS and UOS?
A7: No live demo for this TCM talk this week.
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