[PATCH v15 01/11] phy: rockchip: usbdp: Drop DP HPD handling

[Manivannan Sadhasivam]

On Tue, Sep 15, 2026 at 05:06:04PM +0200, Sebastian Reichel wrote:
> Drop the HPD handling logic from the USBDP PHY. The registers involved
> require the display controller power domain being enabled and thus the
> HPD signal should be handled by the displayport controller itself.
> Apart from that the HPD handling as it is done here is incorrect and
> misses hotplug events happening after the USB-C connector (e.g. when
> a USB-C to HDMI adapter is involved and the HDMI cable is replugged).
> 
> Proper USB-C DP HPD support requires some restructuring of the DP
> controller driver, which will happen independent of this patch. The
> mainline kernel does not yet support USB-C DP AltMode on RK3588 and
> RK3576, so it is fine to drop this code without adding the counterpart
> in the DRM in an atomic change.
> 
> Tested-by: Igor Paunovic <royalnet026 at gmail.com> # Orange Pi 5 Plus
> Signed-off-by: Sebastian Reichel <sebastian.reichel at collabora.com>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam at oss.qualcomm.com>

- Mani

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