[RFC PATCH 00/17] drm: bridge: Samsung MIPI DSIM bridge

[Jagan Teki]

Hi Sam,

On Sun, Jul 25, 2021 at 10:35 PM Sam Ravnborg <sam at ravnborg.org> wrote:
>
> Hi Jagan,
>
> On Sun, Jul 04, 2021 at 02:32:13PM +0530, Jagan Teki wrote:
> > This series supports common bridge support for Samsung MIPI DSIM
> > which is used in Exynos and i.MX8MM SoC's.
> >
> > The final bridge supports both the Exynos and i.MX8MM DSI devices.
> >
> > Right now bridge offers two sets of implementations.
> >
> > A. With component_ops and exynos specific code exclusively for
> >    exynos dsi drivers and it's legacy bindings.
> >
> > B. Without componenet_ops for newly implemented bridges and its
> >    users like i.MX8MM.
> >
> > The future plan is to fix the implementation A) by dropping
> > component_ops and fixing exynos specific code in order to make
> > the bridge more mature to use and the same is mentioned in
> > drivers TODO.
> >
> > Patch 0001 - 0006: Bridge conversion
> > Patch 0007 - 0017: Samsung MIPI DSIM bridge fixes, additions
> >
> > Tested in Engicam i.Core MX8M Mini SoM.
> >
> > Anyone interest, please have a look on this repo
> > https://github.com/openedev/linux/tree/070421-imx8mm-dsim
> >
> > Would appreciate anyone from the exynos team to test it on
> > the exynos platform?
> >
> > Any inputs?
>
> I really like where you are headign with this!
> No testing - sorry. But I will try to provide a bit of feedback on the
> individual patches.
>
> I hope you find a way to move forward with this.

Thanks for the response.

We have found some issues with Bridge conversion on existing exynos
drivers. The component based DSI drivers(like exynos) are difficult to
attach if it involves kms hotplug. kms hotplug would require drm
pointer and that pointer would only available after the bind call
finishes. But the bridge attach in bind call will defer till it find
the attached bridge.

Right now I'm trying to find the proper way to attach the bridges for
component based DSI drivers which involves kms hot-plug.

If you have any ideas on this, please let me know.

Thanks,
Jagan.