On Thu Apr 17, 2025 at 2:08 PM BST, Alex Deucher wrote: > On Wed, Apr 16, 2025 at 8:43 PM Fugang Duan <fugang.d...@cixtech.com> wrote: >> >> 发件人: Alex Deucher <alexdeuc...@gmail.com> 发送时间: 2025年4月16日 22:49 >> >收件人: Alexey Klimov <alexey.kli...@linaro.org> >> >On Wed, Apr 16, 2025 at 9:48 AM Alexey Klimov <alexey.kli...@linaro.org> >> >wrote: >> >> >> >> On Wed Apr 16, 2025 at 4:12 AM BST, Fugang Duan wrote: >> >> > 发件人: Alexey Klimov <alexey.kli...@linaro.org> 发送时间: 2025年4月16 >> >日 2:28 >> >> >>#regzbot introduced: v6.12..v6.13 >> >> >> >> [..] >> >> >> >> >>The only change related to hdp_v5_0_flush_hdp() was >> >> >>cf424020e040 drm/amdgpu/hdp5.0: do a posting read when flushing HDP >> >> >> >> >> >>Reverting that commit ^^ did help and resolved that problem. Before >> >> >>sending revert as-is I was interested to know if there supposed to >> >> >>be a proper fix for this or maybe someone is interested to debug this or >> >have any suggestions. >> >> >> >> >> > Can you revert the change and try again >> >> > https://gitlab.com/linux-kernel/linux/-/commit/cf424020e040be35df05b >> >> > 682b546b255e74a420f >> >> >> >> Please read my email in the first place. >> >> Let me quote just in case: >> >> >> >> >The only change related to hdp_v5_0_flush_hdp() was >> >> >cf424020e040 drm/amdgpu/hdp5.0: do a posting read when flushing HDP >> >> >> >> >Reverting that commit ^^ did help and resolved that problem. >> > >> >We can't really revert the change as that will lead to coherency problems. >> >What >> >is the page size on your system? Does the attached patch fix it? >> > >> >Alex >> > >> 4K page size. We can try the fix if we got the environment. > > OK. that patch won't change anything then. Can you try this patch instead?
Config I am using is basically defconfig wrt memory parameters, yeah, i use 4k. So I tested that patch, thank you, and some other different configurations -- nothing helped. Exactly the same behaviour with the same backtrace. So it seems that it is firmware problem after all? Thanks, Alexey
