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

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

[Chaoyi Chen]

From: Chaoyi Chen <chaoyi.chen@rock-chips.com>

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@oss.nxp.com>
Signed-off-by: Chaoyi Chen <chaoyi.chen@rock-chips.com>
---
Changes in v3:
- Link to v2: https://lore.kernel.org/all/20260705065832.184-1-kernel@airkyi.com/
- 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@airkyi.com/
- 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
 	help
 	  DisplayPort USB Type-C Alternate Mode allows DisplayPort
 	  displays and adapters to be attached to the USB Type-C
-- 
2.54.0

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

[Heikki Krogerus]

On Thu, Jul 09, 2026 at 02:21:47PM +0800, Chaoyi Chen wrote:
> From: Chaoyi Chen <chaoyi.chen@rock-chips.com>
> 
> 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@oss.nxp.com>
> Signed-off-by: Chaoyi Chen <chaoyi.chen@rock-chips.com>
> ---
> Changes in v3:
> - Link to v2: https://lore.kernel.org/all/20260705065832.184-1-kernel@airkyi.com/
> - 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@airkyi.com/
> - 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

Thanks,

>  	help
>  	  DisplayPort USB Type-C Alternate Mode allows DisplayPort
>  	  displays and adapters to be attached to the USB Type-C
> -- 
> 2.54.0

-- 
heikki