Hello Andy, On Tue, Jul 14, 2026 at 06:08:06PM +0800, Andy Yan wrote: > > @@ -58,6 +59,8 @@ static void dw_dp_rockchip_hpd_sw_sel(void *data, bool > > force_hpd_from_sw) > > > > dp->hpd_sel = force_hpd_from_sw; > > > > + ACQUIRE(pm_runtime_active_auto, pm)(dp->dev); > > This can triger HPD irq for USB-C DP AltMode, but for a standard > DP port, this is no way to acquire runtime, so there will no irq > when plug in.
Right. I don't have any RK3588 or RK3576 system exposing a DP connector directly. This this is non-trivial to test for me :/ I see the following options: 1. Only enable runtime PM when running in USB-C mode 2. Mux the HPD pin as GPIO to support waking up with the controller being suspended; either remux when the controller is awake or use the same mechanism as USB-C to do software based HPD on top of the GPIO (which would allow using any GPIO as HPD). 3. Have a poll function, which wakes up the controller regularly to check the status I consider going for option 1 for now, which allows option 2 to be implemented as a follow up. Mostly to avoid that the series becomes as big and messy as the USBDP PHY series became. Greetings, -- Sebastian
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