Re: [PATCH v7 4/4] drm/tidss: Add OLDI bridge support

[Michael Walle]

On Sat Mar 29, 2025 at 2:39 PM CET, Aradhya Bhatia wrote:
> From: Aradhya Bhatia <a-bhatia1@xxxxxx>
>
> The AM62x and AM62Px SoCs feature 2 OLDI TXes each, which makes it
> possible to connect them in dual-link or cloned single-link OLDI display
> modes. The current OLDI support in tidss_dispc.c can only support for
> a single OLDI TX, connected to a VP and doesn't really support
> configuration of OLDIs in the other modes. The current OLDI support in
> tidss_dispc.c also works on the principle that the OLDI output can only
> be served by one, and only one, DSS video-port. This isn't the case in
> the AM62Px SoC, where there are 2 DSS controllers present that share the
> OLDI TXes.
>
> Having their own devicetree and their own bridge entity will help
> support the various display modes and sharing possiblilities of the OLDI
> hardware.
>
> For all these reasons, add support for the OLDI TXes as DRM bridges.
>
> Reviewed-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>
> Tested-by: Alexander Sverdlin <alexander.sverdlin@xxxxxxxxxxx>
> Signed-off-by: Aradhya Bhatia <a-bhatia1@xxxxxx>
> Signed-off-by: Aradhya Bhatia <aradhya.bhatia@xxxxxxxxx>

Tested-by: Michael Walle <mwalle@xxxxxxxxxx> # on a j722s/am67a

FWIW, I have a few downstream patches to get the DSS on j722s
running.

-michael

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