On Tue, Dec 10, 2024 at 08:50:51AM +0800, Andy Yan wrote: > > > Hi, > > At 2024-12-10 07:12:26, "Heiko Stübner" <heiko@xxxxxxxxx> wrote: > >Am Montag, 9. Dezember 2024, 17:11:03 CET schrieb Diederik de Haas: > >> Hi, > >> > >> On Mon Dec 9, 2024 at 4:06 PM CET, Daniel Semkowicz wrote: > >> > On 03.12.24 21:54, Heiko Stuebner wrote: > >> > > This series adds a bridge and glue driver for the DSI2 controller found > >> > > in the rk3588 soc from Rockchip, that is based on a Synopsis IP block. > >> > > > >> > > >> > I did more tests with different LVDS displays. I tested following > >> > configurations with DSI/LVDS bridge: > >> > - 1024x600@60.01 > >> > - 1024x768@60.02 > >> > - 1280x800@60.07 > >> > - 1366x768@60.06 > >> > > >> > All of them worked without issues, except 1366x768. > >> > With this resolution, video is blurry, and offset incorrectly > >> > to the left. There are also repeating errors on the console: > >> > > >> > rockchip-drm display-subsystem: [drm] *ERROR* POST_BUF_EMPTY irq err at vp3 > >> > > >> > In correct operation with other resolutions, there is no error. > >> > I am not sure if this is a problem in your series or rather in VOP2 > >> > driver. > > > >This really sounds like something is wrong on the vop side. > >The interrupt is part of the vop, the divisable by 4 things likely too. > > This is a hardware limitation on vop side: > The horizontal resolution must be 4 pixel aligned. Then mode_valid() and atomic_check() must reject modes that don't fit. > > > -- With best wishes Dmitry
