On Mon, Dec 18, 2023 at 1:31 PM Mikhail Gavrilov <mikhail.v.gavrilov@xxxxxxxxx> wrote: > > On Fri, Dec 15, 2023 at 9:14 PM Hamza Mahfooz <hamza.mahfooz@xxxxxxx> wrote: > > > > Can you try the following patch with old fw (version 0x07002100 should > > be fine)?: https://patchwork.freedesktop.org/patch/572298/ > > > > Tested-by: Mikhail Gavrilov <mikhail.v.gavrilov@xxxxxxxxx> on 7900XTX hardware. > > Can I ask? > What does SubVP actually do? > I read on Phoronix that this is new feature of DCN 3.2 hardware > https://www.phoronix.com/news/AMDGPU-Linux-6.5-Improvements > But I didn't notice that anything began to work better after enabling > this feature. > On the contrary, my kernel logs began to become overgrown with > unpleasant errors. > See here: https://gitlab.freedesktop.org/drm/amd/-/issues/2796 > I bisected this issue and bisect heads me to commit > 299004271cbf0315da327c4bd67aec3e7041cb32 which enables SubVP high > refresh rate. > But without SubVP I also had 120Hz and 4K. So I ask again what is the > profit of SubVP? IIRC, SubVP is a power saving feature which allows us to dynamically adjust the memory clocks in more cases with narrow blanking periods. Alex
