Re: [PATCH v10 11/18] drm/bridge: analogix_dp: Apply drm_bridge_connector helper

[Damon Ding]

Hi Luca,

On 3/14/2026 1:10 AM, Luca Ceresoli wrote:
> Hello Damon,
>
> On Tue Mar 10, 2026 at 2:24 AM CET, Damon Ding wrote:
> > Initialize bridge_connector for both Rockchip and Exynos encoder sides.
> > Then, make DRM_BRIDGE_ATTACH_NO_CONNECTOR mandatory for Analogix bridge
> > side, as the private &drm_connector is no longer created.
> >
> > The previous &drm_connector_funcs and &drm_connector_helper_funcs APIs
> > are replaced by the corresponding &drm_bridge_funcs APIs:
> >
> > analogix_dp_atomic_check() -> analogix_dp_bridge_atomic_check()
> > analogix_dp_detect()       -> analogix_dp_bridge_detect()
> > analogix_dp_get_modes()    -> analogix_dp_bridge_get_modes()
> >                                analogix_dp_bridge_edid_read()
> >
> > Additionally, the compatibilities of Analogix DP bridge based on whether
> > the next bridge is a 'panel'. If it is, OP_MODES and OP_DETECT are
> > supported; If not (the next bridge is a 'monitor' or a bridge chip),
> > OP_EDID and OP_DETECT are supported.
> >
> > The devm_drm_bridge_add() is placed in analogix_dp_bind() instead of
> > analogix_dp_probe(), because the type of next bridge (the panel, monitor
> > or bridge chip) can only be determined after the probe process has fully
> > completed.
> >
> > Signed-off-by: Damon Ding <damon.ding@xxxxxxxxxxxxxx>
> > Tested-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
> > Tested-by: Heiko Stuebner <heiko@xxxxxxxxx> (on rk3588)
>
> ...
>
> > @@ -73,15 +72,12 @@ static int exynos_dp_bridge_attach(struct analogix_dp_plat_data *plat_data,
> >   				   struct drm_bridge *bridge)
> >   {
> >   	struct exynos_dp_device *dp = to_dp(plat_data);
> > -	enum drm_bridge_attach_flags flags = 0;
> >   	int ret;
> >
> >   	/* Pre-empt DP connector creation if there's a bridge */
> >   	if (plat_data->next_bridge) {
> > -		if (dp->has_of_bridge)
> > -			flags = DRM_BRIDGE_ATTACH_NO_CONNECTOR;
> > -
> > -		ret = drm_bridge_attach(&dp->encoder, plat_data->next_bridge, bridge, flags);
> > +		ret = drm_bridge_attach(&dp->encoder, plat_data->next_bridge, bridge,
> > +					DRM_BRIDGE_ATTACH_NO_CONNECTOR);
>
> Should this be 'flags | DRM_BRIDGE_ATTACH_NO_CONNECTOR' to be future-proof?

Aha, the exynos_dp_bridge_attach() and even 
&analogix_dp_plat_data.attach() have been removed in [PATCH v10 16/18] 
for consistency and simplification. Since the only bridge flag supported 
right now is DRM_BRIDGE_ATTACH_NO_CONNECTOR, let’s leave this as is for 
now. ;-)

Best regards,
Damon