17.02.2022 18:00, Sascha Hauer пишет: > On Thu, Feb 17, 2022 at 03:35:08PM +0300, Dmitry Osipenko wrote: >> 17.02.2022 11:29, Sascha Hauer пишет: >>> The rk3568 HDMI has an additional clock that needs to be enabled for the >>> HDMI controller to work. The purpose of that clock is not clear. It is >>> named "hclk" in the downstream driver, so use the same name. >> >> Have you checked that DSI works without the enabled hclk? I'd expect the >> whole VOP to be clock-gated. > > No, I haven't checked that. > > I am not sure where you aiming at. The HCLK_VOP is supplied to the vop2 > as well and the vop2 driver also enables this clock. Still, when the > HDMI registers are accessed before the vop2 driver enables HCLK_VOP then > the system hangs, so the HDMI needs it also. HDMI, MIPI and etc are a part of VOP. I'm curious whether MIPI should also hang, at least datasheet suggests that it should since hclk ungates the AHB part of the VOP's h/w module, which is used for registers access.
