[PATCH] drm: rcar-du: Setup planes before enabling CRTC to avoid flicker

[Geert Uytterhoeven]

On Wed, Jun 28, 2017 at 8:50 PM, Laurent Pinchart
<laurent.pinchart+renesas at ideasonboard.com> wrote:
> Commit 52055bafa1ff ("drm: rcar-du: Move plane commit code from CRTC
> start to CRTC resume") changed the order of the plane commit and CRTC
> enable operations to accommodate the runtime PM requirements. However,
> this introduced corruption in the first displayed frame, as the CRTC is
> now enabled without any plane configured. On Gen2 hardware the first
> frame will be black and likely unnoticed, but on Gen3 hardware we end up
> starting the display before the VSP compositor, which is more
> noticeable.
>
> To fix this, revert the order of the commit operations back, and handle
> runtime PM requirements in the CRTC .atomic_begin() and .atomic_enable()
> helper operation handlers.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas at ideasonboard.com>

Fixes: ...

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds