On 5/4/26 22:09, Mohit Dsor wrote: > Sorry for the late reply. I am attaching clk_summary and reg_dump in > working and non working case. Lilliput is just a normal display working > with hdmi and has 720p as preferred mode. Yes, I was talking about RB3 > Gen2 only.
Neil, Dmitry, and Mohit: what's the status here? From the outside it looks like this regression is still unfixed with nothing happening for weeks now. Or has progress been made and I just missed it? Ciao, Thorsten > On Sun, Apr 26, 2026 at 4:14 AM Dmitry Baryshkov > <[email protected] > <mailto:[email protected]>> wrote: > > On Sun, Apr 26, 2026 at 03:38:49AM +0530, Mohit Dsor wrote: > > Hi Neil, all, > > > > We are seeing a regression after: > > > > drm/msm: dsi: fix PLL init in bonded mode > > https://lore.kernel.org/r/20251027-topic-sm8x50-fix-dsi-bonded- > [email protected] <https://lore.kernel.org/r/20251027- > [email protected]> > > > > Issue: > > - Resolutions are broken after this change. Like if we try to run > 720p60 it will be 720p30. > > Even though the byte_clk is set correctly, the bridge is > receiving half the byte clock. > > Some divider is getting set which is causing the byte_clk to get > half, ultimately fps to > > get half. Some other resolutions may or may not be broken > > Please provide necessary excerpts from /sys/kernel/debug/clk/clk_summary > for the working and for the broken cases. Also if there is a difference > in DSI PHY registers, please capture those (see > /sys/kernel/debug/dri/*/kms, provide necessary DSI PHY regs). > > > Reproduction: > > - Used QNX RB3Gen2 Core kit with lilliput display and lt9611uxc > dsi to hdmi bridge. > > What is lilliput? What is QNX RB3 Gen2? Is it the normal Thundercomm's > RB3 Gen2 or some other board sold with the same name? > > > - Run 720p60 usecase on hdmi with dsi to hdmi bridge. > > > > Expected behavior: > > - Display should support the expected resolutions correctly. > > > > Actual behavior: > > - No display on lilliput display. > > > > Additional details: > > - Reverting this change locally avoids the issue. > > > > Could you please take a look? > > > > Thanks, > > Mohit > > -- > With best wishes > Dmitry >
