Re: [PATCH v15 01/11] phy: rockchip: usbdp: Drop DP HPD handling
From: Manivannan Sadhasivam <mani@kernel.org>
Date: 2026-09-26 05:07:02
Also in:
linux-phy, linux-rockchip, lkml
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 <redacted> # Orange Pi 5 Plus Signed-off-by: Sebastian Reichel <redacted>
Reviewed-by: Manivannan Sadhasivam <redacted> - Mani -- மணிவண்ணன் சதாசிவம்