Re: [PATCH v3] usb: typec: altmodes: select DRM_AUX_HPD_BRIDGE for TYPEC_DP_ALTMODE

[Heikki Krogerus]

On Wed, Jul 15, 2026 at 09:19:24AM +0800, Chaoyi Chen wrote:
> Hi Heikki,
> 
> On 7/13/2026 5:35 PM, Heikki Krogerus wrote:
> > On Thu, Jul 09, 2026 at 02:21:47PM +0800, Chaoyi Chen wrote:
> >> From: Chaoyi Chen <chaoyi.chen@xxxxxxxxxxxxxx>
> >>
> >> When TYPEC_DP_ALTMODE is enabled, DRM_AUX_HPD_BRIDGE is most likely
> >> also needed for embedded platforms. Select it when available.
> >>
> >> Suggested-by: Xu Yang <xu.yang_2@xxxxxxxxxxx>
> >> Signed-off-by: Chaoyi Chen <chaoyi.chen@xxxxxxxxxxxxxx>
> >> ---
> >> Changes in v3:
> >> - Link to v2: https://lore.kernel.org/all/20260705065832.184-1-kernel@xxxxxxxxxx/
> >> - Use the same "select" as v1 to make things simple. 
> >>
> >> Changes in v2:
> >> - Link to v1: https://lore.kernel.org/all/20260702022036.44-1-kernel@xxxxxxxxxx/
> >> - Change "select" to "imply".
> >> ---
> >>
> >>  drivers/usb/typec/altmodes/Kconfig | 1 +
> >>  1 file changed, 1 insertion(+)
> >>
> >> diff --git a/drivers/usb/typec/altmodes/Kconfig b/drivers/usb/typec/altmodes/Kconfig
> >> index 7867fa7c405d..b054c0b6a8d4 100644
> >> --- a/drivers/usb/typec/altmodes/Kconfig
> >> +++ b/drivers/usb/typec/altmodes/Kconfig
> >> @@ -5,6 +5,7 @@ menu "USB Type-C Alternate Mode drivers"
> >>  config TYPEC_DP_ALTMODE
> >>  	tristate "DisplayPort Alternate Mode driver"
> >>  	depends on DRM
> >> +	select DRM_AUX_HPD_BRIDGE if DRM_BRIDGE && OF
> > 
> > Is there really no way of making this into a dependency?
> > Doesn't this, or something like it not work:
> > 
> >         depends on (DRM_AUX_HPD_BRIDGE && DRM_BRIDGE && OF) || !DRM_AUX_HPD_BRIDGE
> >
> 
> I think Xu originally wanted to select this item directly, since it
> wasn't visible in the menu and there was nowhere to select it on some platforms.

But now it is user selectable, no?

Thanks,

-- 
heikki