Trying to reduce boot time for weston and logo from weston

[Daniel Stone]

Hi Arunkumar,

On Mon, 27 Jul 2020 at 06:59, arunkrish20 <arunkrish20 at gmail.com> wrote:
> We are working with the i.MX8 platform. We are working with weston and DRM backend. Below are the version details.
>
> NXP BSP Version: 4.14.98_2.0.0_ga
> SC Firmware Version : 1.3.1
> wayland version 1.16 am
> weston- ivi - 5.0.0

We are currently working our way towards releasing Weston 9.0.0, so
this version is quite old.

> Our requirement is to display the first screen in 2 Seconds.
>
> In the current environment we are able to see the first screen in the 6th seconds.

Ouch, that's quite long.

> We tried to boot the weston in initramfs. But due to size constraints we are not able to. Size comes around 65MB.
>
> Is there any possibility for reducing the size of weston?

Weston itself with the DRM + GL backends only takes around 750kB once
installed. I assume the 65MB comes from extra dependencies, but that
is something you would have to investigate and configure in your Yocto
build. Weston itself does not have many dependencies, and those
dependencies are not large.

> Weston taking 500ms to complete the initialization. Can we reduce this timing? e.g if we block unwanted device probing etc, any idea?
>
> In case if we use separate drm based rendering application for the first screen and switching to weston are seeing blank. Instead of clearing the weston screen buffer can we have a logo on first rendering. so that blank can be avoided between the first drm application to weston rendering.

NXP has forked Weston and written their own backend, which is
responsible for the initialisation (both the time and the blank
screen). The default DRM backend is quite quick to come up and be
responsive, and doesn't blank the screen. So both these issues are
something you'd need to raise with NXP support, as they are due to
NXP's changes to our code.

Cheers,
Daniel