Hi,
At 2024-12-10 07:12:26, "Heiko Stübner" <he...@sntech.de> 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. > > >Heiko > > >> >> On my PineTab2 I got similar messages about 2 weeks ago: >> rockchip-drm display-subsystem: [drm] *ERROR* POST_BUF_EMPTY irq err at vp1 >> >> Preceding those, I got several panfrost related errors: >> >> panfrost fde60000.gpu: get clock failed -517 >> panfrost fde60000.gpu: clk init failed -517 >> platform fde60000.gpu: deferred probe pending: (reason unknown) >> platform cpufreq-dt: deferred probe pending: (reason unknown) >> vdd_gpu_npu: disabling >> >> But can also be that the PineTab2 (likely) needs regulator-always-on >> and regulator-boot-on in its vdd_gpu_npu node. >> >> > I tried to track down the problem, and it seems to be a generic issue >> > when horizontal line width is not divisible by 4. >> > Lowering line width to 1364px fixes the issue, but of course I have two >> > vertical lines of black pixels on the right. >> > I also made some tests with 720x1280 DSI display. Lowering horizontal >> > line to 718px shows the same problem. With 720px and 716px it works >> > correctly. >> >> I haven't look further into it, but the PT2 has a 1280x800 resolution. >> >> HTH, >> Diederik >> > > >
