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. 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 >
