Hi Kalyan, On Tue, 24 Nov 2020 at 18:27, <kalyan_t@xxxxxxxxxxxxxx> wrote: > > On 2020-11-08 23:25, Amit Pundir wrote: > > On Tue, 4 Aug 2020 at 21:09, Rob Clark <robdclark@xxxxxxxxx> wrote: > >> > >> On Thu, Jul 16, 2020 at 4:36 AM Kalyan Thota <kalyan_t@xxxxxxxxxxxxxx> > >> wrote: > >> > > >> > This change adds support to scale src clk and bandwidth as > >> > per composition requirements. > >> > > >> > Interconnect registration for bw has been moved to mdp > >> > device node from mdss to facilitate the scaling. > >> > > >> > Changes in v1: > >> > - Address armv7 compilation issues with the patch (Rob) > >> > > >> > Signed-off-by: Kalyan Thota <kalyan_t@xxxxxxxxxxxxxx> > >> > >> Reviewed-by: Rob Clark <robdclark@xxxxxxxxxxxx> > >> > > > > Hi Kalyan, Rob, > > > > This patch broke the display on the PocoF1 phone > > (sdm845-xiaomi-beryllium.dts) running AOSP. > > I can boot to UI but the display is frozen soon after that and > > dmesg is full of following errors: > > > > [drm:dpu_core_perf_crtc_update:397] [dpu error]crtc-65: failed to > > update bus bw vote > > [drm:dpu_core_perf_crtc_check:203] [dpu error]exceeds bandwidth: > > 7649746kb > 6800000kb > > [drm:dpu_crtc_atomic_check:969] [dpu error]crtc65 failed performance > > check -7 > > [drm:dpu_core_perf_crtc_check:203] [dpu error]exceeds bandwidth: > > 7649746kb > 6800000kb > > [drm:dpu_crtc_atomic_check:969] [dpu error]crtc65 failed performance > > check -7 > > [drm:dpu_core_perf_crtc_check:203] [dpu error]exceeds bandwidth: > > 7649746kb > 6800000kb > > [drm:dpu_crtc_atomic_check:969] [dpu error]crtc65 failed performance > > check -7 > > > > Here is the full dmesg https://pastebin.ubuntu.com/p/PcSdNgMnYw/. > > Georgi pointed out following patch but it didn't help, > > https://lore.kernel.org/dri-devel/20201027102304.945424-1-dmitry.baryshkov@xxxxxxxxxx/ > > Am I missing any other followup fix? > > > > Regards, > > Amit Pundir > > __ > > Hi Amit, > > Apologies for the delay. No worries at all. > > I have gone through the logs and referred to the below panel file for > the timings. > https://github.com/Matheus-Garbelini/Kernel-Sphinx-Pocophone-F1/blob/master/arch/arm64/boot/dts/qcom/dsi-panel-tianma-fhd-nt36672a-video.dtsi > > if the above is correct file, then below could be the possible root > cause. > > The panel back porch and pw is less and it is causing the prefill bw > requirement to shoot up per layer as currently we are not considering > front porch in the calculation. can you please try the attached patch in > the email as a solution and provide me the feedback, i'll post it as a > formal change. The attached patch worked for me. Thanks a lot for looking closely into this issue. Regards, Amit Pundir > > Thanks, > Kalyan > > _____________________________________________ > > Freedreno mailing list > > Freedreno@xxxxxxxxxxxxxxxxxxxxx > > https://lists.freedesktop.org/mailman/listinfo/freedreno
