[PATCH v2 3/4] drm/bridge: ti-sn65dsi86: Support DisplayPort (non-eDP) mode

[Doug Anderson]

Hi,

On Wed, Mar 9, 2022 at 9:05 AM Kieran Bingham
<kieran.bingham+renesas at ideasonboard.com> wrote:
>
> >> I think it was done for DRM purpose, to prevent signals meant for a
> >> panel to be connected to a device that could capture video from a DP
> >> source.
>
> Is this better:
>
>         /*
>          * Only eDP pannels which support Alternate Scrambler Seed Reset (ASSR)

s/pannels/panels

>          * are supported by the SN65DSI86. For DisplayPort, disable scrambling
>          * mode.
>          */
>
> I don't know if it answers your 'why' ... and I don't think adding
>  "We think it is for DRM protection"
>
> really suits the comment.

Yeah, that looks pretty good. ...or even:

eDP panels use an Alternate Scrambler Seed compared to displays hooked
up via a full DisplayPort connector. SN65DSI86 only supports the
alternate scrambler seed, not the normal one, so the only way we can
support full DisplayPort displays is by fully turning off the
scrambler.


-Doug