On Mon, Sep 08, 2025 at 03:35:23PM +0200, Maud Spierings wrote:
> Hello Neil,
>
> > Add support for the transparent Realtek RTD2171 DP-to-HDMI bridge.
> >
> > Reviewed-by: Dmitry Baryshkov <dmitry.barysh...@oss.qualcomm.com>
> > Signed-off-by: Neil Armstrong <neil.armstr...@linaro.org>
> > ---
> > drivers/gpu/drm/bridge/simple-bridge.c | 5 +++++
> > 1 file changed, 5 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/bridge/simple-bridge.c
> > b/drivers/gpu/drm/bridge/simple-bridge.c
> > index
> > 1f16d568bcc4e0fb56c763244389e6fecbcb2231..e4d0bc2200f8632bcc883102c89c270a17c68d0c
> > 100644
> > --- a/drivers/gpu/drm/bridge/simple-bridge.c
> > +++ b/drivers/gpu/drm/bridge/simple-bridge.c
> > @@ -266,6 +266,11 @@ static const struct of_device_id simple_bridge_match[]
> > = {
> > .data = &(const struct simple_bridge_info) {
> > .connector_type = DRM_MODE_CONNECTOR_HDMIA,
> > },
> > + }, {
> > + .compatible = "realtek,rtd2171",
> > + .data = &(const struct simple_bridge_info) {
> > + .connector_type = DRM_MODE_CONNECTOR_HDMIA,
> > + },
> > }, {
> > .compatible = "ti,opa362",
> > .data = &(const struct simple_bridge_info) {
> >
> > --
> > 2.34.1
>
> I would like to ask again if it may not be a better idea to introduce a
> fallback compatible, once this patchseries lands I will be adding the
I'd say, that's not a good idea. We usually don't have fully datasheets
for those bridges, so we can't be sure that there are no strapping pins
/ other GPIO controls.
> parade,ps185hdm. I don't know how many other variants there are that are
> just simple dp->hdmi bridges that don't require anything other than the
> connector type set to HDMIA. The Thinkbook 16 and zenbook a14 both have HDMI
> connectors, likely with simple bridges too.
>
> Kind regards,
> Maud
--
With best wishes
Dmitry
