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. 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
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