[meta-freescale] Any hope of vblank-synchronized rendering (from vivante) on i.MX6 soon?

[Carlos Rafael Giani]

I wonder why it is single buffered. is it because of the memory 
consumption for a second buffer? The buffers could be flipped, 
eliminating any need for blits, so the memory bandwidth should not be an 
issue.

On 2014-09-23 18:48, Prabhu S wrote:
> i.MX6 X11 EGL is single buffered and there is no support for VSYNC. 
> The tearing with X11 is a known issue. We did investigate to fix this, 
> but the solution becomes too hacky and cannot be used in production 
> systems.
>
> We are adding VSYNC support in Wayland. eglSwapInterval will be 
> supported for FBDEV and Wayland backends in the upcoming release(in 
> january). So Ozone-wayland can take advantage of this.
>
> On Tue, Sep 23, 2014 at 9:55 AM, Carlos Rafael Giani 
> <dv at pseudoterminal.org <mailto:dv at pseudoterminal.org>> wrote:
>
>     On 09/23/2014 04:50 PM, Daiane Angolini wrote:
>
>         On Tue, Sep 23, 2014 at 11:31 AM, Gerard Bucas
>         <gerard.b at tekmagic.net <mailto:gerard.b at tekmagic.net>> wrote:
>
>             I agree Carlos!
>
>             This is a show-stopper for applications in markets like
>             the Digital Signage market - which could be huge for the
>             i.MX6. The i.MX6 could be the best "media player" out
>             there but the problems related to video playback in a
>             browser (like Chrome/Chromium) needs to be solved wih the
>             highest priority and at the highest level.
>
>             There seem to be TWO main issues:
>
>         Do you have only 2 issues? Have you double checked if they
>         are/are not
>         reported in bugzilla?
>
>         Do you have the detailed step-by-step? I want to reproduce them.
>
>         Daiane
>
>
>     Daiane,
>
>     try out the attached HTML example. It draws a white vertical bar
>     on a black background, and moves that bar horizontally. Run this
>     on an imx6 in Chromium in X11, and you will see how severe the
>     tearing is.
>
>     --
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>

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